diff options
Diffstat (limited to 'src/target/xscale.c')
-rw-r--r-- | src/target/xscale.c | 7598 |
1 files changed, 3799 insertions, 3799 deletions
diff --git a/src/target/xscale.c b/src/target/xscale.c index bfa0f9f..11ae5ee 100644 --- a/src/target/xscale.c +++ b/src/target/xscale.c @@ -1,3799 +1,3799 @@ -/*************************************************************************** - * Copyright (C) 2006, 2007 by Dominic Rath * - * Dominic.Rath@gmx.de * - * * - * This program is free software; you can redistribute it and/or modify * - * it under the terms of the GNU General Public License as published by * - * the Free Software Foundation; either version 2 of the License, or * - * (at your option) any later version. * - * * - * This program is distributed in the hope that it will be useful, * - * but WITHOUT ANY WARRANTY; without even the implied warranty of * - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * - * GNU General Public License for more details. * - * * - * You should have received a copy of the GNU General Public License * - * along with this program; if not, write to the * - * Free Software Foundation, Inc., * - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * - ***************************************************************************/ -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "replacements.h" - -#include "xscale.h" - -#include "register.h" -#include "target.h" -#include "armv4_5.h" -#include "arm_simulator.h" -#include "arm_disassembler.h" -#include "log.h" -#include "jtag.h" -#include "binarybuffer.h" -#include "time_support.h" -#include "breakpoints.h" -#include "fileio.h" - -#include <stdlib.h> -#include <string.h> - -#include <sys/types.h> -#include <unistd.h> -#include <errno.h> - - -/* cli handling */ -int xscale_register_commands(struct command_context_s *cmd_ctx); - -/* forward declarations */ -int xscale_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target); -int xscale_init_target(struct command_context_s *cmd_ctx, struct target_s *target); -int xscale_quit(); - -int xscale_arch_state(struct target_s *target); -int xscale_poll(target_t *target); -int xscale_halt(target_t *target); -int xscale_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution); -int xscale_step(struct target_s *target, int current, u32 address, int handle_breakpoints); -int xscale_debug_entry(target_t *target); -int xscale_restore_context(target_t *target); - -int xscale_assert_reset(target_t *target); -int xscale_deassert_reset(target_t *target); -int xscale_soft_reset_halt(struct target_s *target); -int xscale_prepare_reset_halt(struct target_s *target); - -int xscale_set_reg_u32(reg_t *reg, u32 value); - -int xscale_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode); -int xscale_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, u32 value); - -int xscale_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer); -int xscale_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer); -int xscale_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer); -int xscale_checksum_memory(struct target_s *target, u32 address, u32 count, u32* checksum); - -int xscale_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint); -int xscale_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint); -int xscale_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint); -int xscale_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint); -int xscale_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint); -int xscale_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint); -void xscale_enable_watchpoints(struct target_s *target); -void xscale_enable_breakpoints(struct target_s *target); -static int xscale_virt2phys(struct target_s *target, u32 virtual, u32 *physical); -static int xscale_mmu(struct target_s *target, int *enabled); - -int xscale_read_trace(target_t *target); - -target_type_t xscale_target = -{ - .name = "xscale", - - .poll = xscale_poll, - .arch_state = xscale_arch_state, - - .target_request_data = NULL, - - .halt = xscale_halt, - .resume = xscale_resume, - .step = xscale_step, - - .assert_reset = xscale_assert_reset, - .deassert_reset = xscale_deassert_reset, - .soft_reset_halt = xscale_soft_reset_halt, - .prepare_reset_halt = xscale_prepare_reset_halt, - - .get_gdb_reg_list = armv4_5_get_gdb_reg_list, - - .read_memory = xscale_read_memory, - .write_memory = xscale_write_memory, - .bulk_write_memory = xscale_bulk_write_memory, - .checksum_memory = xscale_checksum_memory, - - .run_algorithm = armv4_5_run_algorithm, - - .add_breakpoint = xscale_add_breakpoint, - .remove_breakpoint = xscale_remove_breakpoint, - .add_watchpoint = xscale_add_watchpoint, - .remove_watchpoint = xscale_remove_watchpoint, - - .register_commands = xscale_register_commands, - .target_command = xscale_target_command, - .init_target = xscale_init_target, - .quit = xscale_quit, - - .virt2phys = xscale_virt2phys, - .mmu = xscale_mmu -}; - -char* xscale_reg_list[] = -{ - "XSCALE_MAINID", /* 0 */ - "XSCALE_CACHETYPE", - "XSCALE_CTRL", - "XSCALE_AUXCTRL", - "XSCALE_TTB", - "XSCALE_DAC", - "XSCALE_FSR", - "XSCALE_FAR", - "XSCALE_PID", - "XSCALE_CPACCESS", - "XSCALE_IBCR0", /* 10 */ - "XSCALE_IBCR1", - "XSCALE_DBR0", - "XSCALE_DBR1", - "XSCALE_DBCON", - "XSCALE_TBREG", - "XSCALE_CHKPT0", - "XSCALE_CHKPT1", - "XSCALE_DCSR", - "XSCALE_TX", - "XSCALE_RX", /* 20 */ - "XSCALE_TXRXCTRL", -}; - -xscale_reg_t xscale_reg_arch_info[] = -{ - {XSCALE_MAINID, NULL}, - {XSCALE_CACHETYPE, NULL}, - {XSCALE_CTRL, NULL}, - {XSCALE_AUXCTRL, NULL}, - {XSCALE_TTB, NULL}, - {XSCALE_DAC, NULL}, - {XSCALE_FSR, NULL}, - {XSCALE_FAR, NULL}, - {XSCALE_PID, NULL}, - {XSCALE_CPACCESS, NULL}, - {XSCALE_IBCR0, NULL}, - {XSCALE_IBCR1, NULL}, - {XSCALE_DBR0, NULL}, - {XSCALE_DBR1, NULL}, - {XSCALE_DBCON, NULL}, - {XSCALE_TBREG, NULL}, - {XSCALE_CHKPT0, NULL}, - {XSCALE_CHKPT1, NULL}, - {XSCALE_DCSR, NULL}, /* DCSR accessed via JTAG or SW */ - {-1, NULL}, /* TX accessed via JTAG */ - {-1, NULL}, /* RX accessed via JTAG */ - {-1, NULL}, /* TXRXCTRL implicit access via JTAG */ -}; - -int xscale_reg_arch_type = -1; - -int xscale_get_reg(reg_t *reg); -int xscale_set_reg(reg_t *reg, u8 *buf); - -int xscale_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, xscale_common_t **xscale_p) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC) - { - ERROR("target isn't an XScale target"); - return -1; - } - - if (xscale->common_magic != XSCALE_COMMON_MAGIC) - { - ERROR("target isn't an XScale target"); - return -1; - } - - *armv4_5_p = armv4_5; - *xscale_p = xscale; - - return ERROR_OK; -} - -int xscale_jtag_set_instr(int chain_pos, u32 new_instr) -{ - jtag_device_t *device = jtag_get_device(chain_pos); - - if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr) - { - scan_field_t field; - - field.device = chain_pos; - field.num_bits = device->ir_length; - field.out_value = calloc(CEIL(field.num_bits, 8), 1); - buf_set_u32(field.out_value, 0, field.num_bits, new_instr); - field.out_mask = NULL; - field.in_value = NULL; - jtag_set_check_value(&field, device->expected, device->expected_mask, NULL); - - jtag_add_ir_scan(1, &field, -1, NULL); - - free(field.out_value); - } - - return ERROR_OK; -} - -int xscale_jtag_callback(enum jtag_event event, void *priv) -{ - switch (event) - { - case JTAG_TRST_ASSERTED: - break; - case JTAG_TRST_RELEASED: - break; - case JTAG_SRST_ASSERTED: - break; - case JTAG_SRST_RELEASED: - break; - default: - WARNING("unhandled JTAG event"); - } - - return ERROR_OK; -} - -int xscale_read_dcsr(target_t *target) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - int retval; - - scan_field_t fields[3]; - u8 field0 = 0x0; - u8 field0_check_value = 0x2; - u8 field0_check_mask = 0x7; - u8 field2 = 0x0; - u8 field2_check_value = 0x0; - u8 field2_check_mask = 0x1; - - jtag_add_end_state(TAP_PD); - xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr); - - buf_set_u32(&field0, 1, 1, xscale->hold_rst); - buf_set_u32(&field0, 2, 1, xscale->external_debug_break); - - fields[0].device = xscale->jtag_info.chain_pos; - fields[0].num_bits = 3; - fields[0].out_value = &field0; - fields[0].out_mask = NULL; - fields[0].in_value = NULL; - jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL); - - fields[1].device = xscale->jtag_info.chain_pos; - fields[1].num_bits = 32; - fields[1].out_value = NULL; - fields[1].out_mask = NULL; - fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value; - fields[1].in_handler = NULL; - fields[1].in_handler_priv = NULL; - fields[1].in_check_value = NULL; - fields[1].in_check_mask = NULL; - - - - fields[2].device = xscale->jtag_info.chain_pos; - fields[2].num_bits = 1; - fields[2].out_value = &field2; - fields[2].out_mask = NULL; - fields[2].in_value = NULL; - jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL); - - jtag_add_dr_scan(3, fields, -1, NULL); - - if ((retval = jtag_execute_queue()) != ERROR_OK) - { - ERROR("JTAG error while reading DCSR"); - return retval; - } - - xscale->reg_cache->reg_list[XSCALE_DCSR].dirty = 0; - xscale->reg_cache->reg_list[XSCALE_DCSR].valid = 1; - - /* write the register with the value we just read - * on this second pass, only the first bit of field0 is guaranteed to be 0) - */ - field0_check_mask = 0x1; - fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value; - fields[1].in_value = NULL; - - jtag_add_end_state(TAP_RTI); - - jtag_add_dr_scan(3, fields, -1, NULL); - - return ERROR_OK; -} - -int xscale_receive(target_t *target, u32 *buffer, int num_words) -{ - int retval = ERROR_OK; - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - enum tap_state path[3]; - scan_field_t fields[3]; - - u8 *field0 = malloc(num_words * 1); - u8 field0_check_value = 0x2; - u8 field0_check_mask = 0x6; - u32 *field1 = malloc(num_words * 4); - u8 field2_check_value = 0x0; - u8 field2_check_mask = 0x1; - int words_done = 0; - int words_scheduled = 0; - - int i; - - path[0] = TAP_SDS; - path[1] = TAP_CD; - path[2] = TAP_SD; - - fields[0].device = xscale->jtag_info.chain_pos; - fields[0].num_bits = 3; - fields[0].out_value = NULL; - fields[0].out_mask = NULL; - /* fields[0].in_value = field0; */ - jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL); - - fields[1].device = xscale->jtag_info.chain_pos; - fields[1].num_bits = 32; - fields[1].out_value = NULL; - fields[1].out_mask = NULL; - fields[1].in_value = NULL; - fields[1].in_handler = NULL; - fields[1].in_handler_priv = NULL; - fields[1].in_check_value = NULL; - fields[1].in_check_mask = NULL; - - - - fields[2].device = xscale->jtag_info.chain_pos; - fields[2].num_bits = 1; - fields[2].out_value = NULL; - fields[2].out_mask = NULL; - fields[2].in_value = NULL; - jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL); - - jtag_add_end_state(TAP_RTI); - xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgtx); - jtag_add_runtest(1, -1); - - /* repeat until all words have been collected */ - int attempts = 0; - while (words_done < num_words) - { - /* schedule reads */ - words_scheduled = 0; - for (i = words_done; i < num_words; i++) - { - fields[0].in_value = &field0[i]; - fields[1].in_handler = buf_to_u32_handler; - fields[1].in_handler_priv = (u8*)&field1[i]; - - jtag_add_pathmove(3, path); - jtag_add_dr_scan(3, fields, TAP_RTI, NULL); - words_scheduled++; - } - - if ((retval = jtag_execute_queue()) != ERROR_OK) - { - ERROR("JTAG error while receiving data from debug handler"); - break; - } - - /* examine results */ - for (i = words_done; i < num_words; i++) - { - if (!(field0[0] & 1)) - { - /* move backwards if necessary */ - int j; - for (j = i; j < num_words - 1; j++) - { - field0[j] = field0[j+1]; - field1[j] = field1[j+1]; - } - words_scheduled--; - } - } - if (words_scheduled == 0) - { - if (attempts++ == 1000) - { - ERROR("Failed to receiving data from debug handler after 1000 attempts"); - retval = ERROR_JTAG_QUEUE_FAILED; - break; - } - } - - words_done += words_scheduled; - } - - for (i = 0; i < num_words; i++) - *(buffer++) = buf_get_u32((u8*)&field1[i], 0, 32); - - free(field1); - - return retval; -} - -int xscale_read_tx(target_t *target, int consume) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - enum tap_state path[3]; - enum tap_state noconsume_path[9]; - - int retval; - struct timeval timeout, now; - - scan_field_t fields[3]; - u8 field0_in = 0x0; - u8 field0_check_value = 0x2; - u8 field0_check_mask = 0x6; - u8 field2_check_value = 0x0; - u8 field2_check_mask = 0x1; - - jtag_add_end_state(TAP_RTI); - - xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgtx); - - path[0] = TAP_SDS; - path[1] = TAP_CD; - path[2] = TAP_SD; - - noconsume_path[0] = TAP_SDS; - noconsume_path[1] = TAP_CD; - noconsume_path[2] = TAP_E1D; - noconsume_path[3] = TAP_PD; - noconsume_path[4] = TAP_E2D; - noconsume_path[5] = TAP_UD; - noconsume_path[6] = TAP_SDS; - noconsume_path[7] = TAP_CD; - noconsume_path[8] = TAP_SD; - - fields[0].device = xscale->jtag_info.chain_pos; - fields[0].num_bits = 3; - fields[0].out_value = NULL; - fields[0].out_mask = NULL; - fields[0].in_value = &field0_in; - jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL); - - fields[1].device = xscale->jtag_info.chain_pos; - fields[1].num_bits = 32; - fields[1].out_value = NULL; - fields[1].out_mask = NULL; - fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_TX].value; - fields[1].in_handler = NULL; - fields[1].in_handler_priv = NULL; - fields[1].in_check_value = NULL; - fields[1].in_check_mask = NULL; - - - - fields[2].device = xscale->jtag_info.chain_pos; - fields[2].num_bits = 1; - fields[2].out_value = NULL; - fields[2].out_mask = NULL; - fields[2].in_value = NULL; - jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL); - - gettimeofday(&timeout, NULL); - timeval_add_time(&timeout, 5, 0); - - do - { - /* if we want to consume the register content (i.e. clear TX_READY), - * we have to go straight from Capture-DR to Shift-DR - * otherwise, we go from Capture-DR to Exit1-DR to Pause-DR - */ - if (consume) - jtag_add_pathmove(3, path); - else - jtag_add_pathmove(sizeof(noconsume_path)/sizeof(*noconsume_path), noconsume_path); - - jtag_add_dr_scan(3, fields, TAP_RTI, NULL); - - if ((retval = jtag_execute_queue()) != ERROR_OK) - { - ERROR("JTAG error while reading TX"); - return ERROR_TARGET_TIMEOUT; - } - - gettimeofday(&now, NULL); - if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec)&& (now.tv_usec > timeout.tv_usec))) - { - ERROR("time out reading TX register"); - return ERROR_TARGET_TIMEOUT; - } - } while ((!(field0_in & 1)) && consume); - - if (!(field0_in & 1)) - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - - return ERROR_OK; -} - -int xscale_write_rx(target_t *target) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - int retval; - struct timeval timeout, now; - - scan_field_t fields[3]; - u8 field0_out = 0x0; - u8 field0_in = 0x0; - u8 field0_check_value = 0x2; - u8 field0_check_mask = 0x6; - u8 field2 = 0x0; - u8 field2_check_value = 0x0; - u8 field2_check_mask = 0x1; - - jtag_add_end_state(TAP_RTI); - - xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgrx); - - fields[0].device = xscale->jtag_info.chain_pos; - fields[0].num_bits = 3; - fields[0].out_value = &field0_out; - fields[0].out_mask = NULL; - fields[0].in_value = &field0_in; - jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL); - - fields[1].device = xscale->jtag_info.chain_pos; - fields[1].num_bits = 32; - fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_RX].value; - fields[1].out_mask = NULL; - fields[1].in_value = NULL; - fields[1].in_handler = NULL; - fields[1].in_handler_priv = NULL; - fields[1].in_check_value = NULL; - fields[1].in_check_mask = NULL; - - - - fields[2].device = xscale->jtag_info.chain_pos; - fields[2].num_bits = 1; - fields[2].out_value = &field2; - fields[2].out_mask = NULL; - fields[2].in_value = NULL; - jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL); - - gettimeofday(&timeout, NULL); - timeval_add_time(&timeout, 5, 0); - - /* poll until rx_read is low */ - DEBUG("polling RX"); - do - { - jtag_add_dr_scan(3, fields, TAP_RTI, NULL); - - if ((retval = jtag_execute_queue()) != ERROR_OK) - { - ERROR("JTAG error while writing RX"); - return retval; - } - - gettimeofday(&now, NULL); - if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec)&& (now.tv_usec > timeout.tv_usec))) - { - ERROR("time out writing RX register"); - return ERROR_TARGET_TIMEOUT; - } - } while (field0_in & 1); - - /* set rx_valid */ - field2 = 0x1; - jtag_add_dr_scan(3, fields, TAP_RTI, NULL); - - if ((retval = jtag_execute_queue()) != ERROR_OK) - { - ERROR("JTAG error while writing RX"); - return retval; - } - - return ERROR_OK; -} - -/* send count elements of size byte to the debug handler */ -int xscale_send(target_t *target, u8 *buffer, int count, int size) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - int retval; - - int done_count = 0; - u8 output[4] = {0, 0, 0, 0}; - - scan_field_t fields[3]; - u8 field0_out = 0x0; - u8 field0_check_value = 0x2; - u8 field0_check_mask = 0x6; - u8 field2 = 0x1; - u8 field2_check_value = 0x0; - u8 field2_check_mask = 0x1; - - jtag_add_end_state(TAP_RTI); - - xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgrx); - - fields[0].device = xscale->jtag_info.chain_pos; - fields[0].num_bits = 3; - fields[0].out_value = &field0_out; - fields[0].out_mask = NULL; - fields[0].in_handler = NULL; - if (!xscale->fast_memory_access) - { - jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL); - } - - fields[1].device = xscale->jtag_info.chain_pos; - fields[1].num_bits = 32; - fields[1].out_value = output; - fields[1].out_mask = NULL; - fields[1].in_value = NULL; - fields[1].in_handler = NULL; - fields[1].in_handler_priv = NULL; - fields[1].in_check_value = NULL; - fields[1].in_check_mask = NULL; - - - - fields[2].device = xscale->jtag_info.chain_pos; - fields[2].num_bits = 1; - fields[2].out_value = &field2; - fields[2].out_mask = NULL; - fields[2].in_value = NULL; - fields[2].in_handler = NULL; - if (!xscale->fast_memory_access) - { - jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL); - } - - if (size==4) - { - int endianness = target->endianness; - while (done_count++ < count) - { - if (endianness == TARGET_LITTLE_ENDIAN) - { - output[0]=buffer[0]; - output[1]=buffer[1]; - output[2]=buffer[2]; - output[3]=buffer[3]; - } else - { - output[0]=buffer[3]; - output[1]=buffer[2]; - output[2]=buffer[1]; - output[3]=buffer[0]; - } - jtag_add_dr_scan(3, fields, TAP_RTI, NULL); - buffer += size; - } - - } else - { - while (done_count++ < count) - { - /* extract sized element from target-endian buffer, and put it - * into little-endian output buffer - */ - switch (size) - { - case 2: - buf_set_u32(output, 0, 32, target_buffer_get_u16(target, buffer)); - break; - case 1: - output[0] = *buffer; - break; - default: - ERROR("BUG: size neither 4, 2 nor 1"); - exit(-1); - } - - jtag_add_dr_scan(3, fields, TAP_RTI, NULL); - buffer += size; - } - - } - - if ((retval = jtag_execute_queue()) != ERROR_OK) - { - ERROR("JTAG error while sending data to debug handler"); - return retval; - } - - return ERROR_OK; -} - -int xscale_send_u32(target_t *target, u32 value) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - buf_set_u32(xscale->reg_cache->reg_list[XSCALE_RX].value, 0, 32, value); - return xscale_write_rx(target); -} - -int xscale_write_dcsr(target_t *target, int hold_rst, int ext_dbg_brk) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - int retval; - - scan_field_t fields[3]; - u8 field0 = 0x0; - u8 field0_check_value = 0x2; - u8 field0_check_mask = 0x7; - u8 field2 = 0x0; - u8 field2_check_value = 0x0; - u8 field2_check_mask = 0x1; - - if (hold_rst != -1) - xscale->hold_rst = hold_rst; - - if (ext_dbg_brk != -1) - xscale->external_debug_break = ext_dbg_brk; - - jtag_add_end_state(TAP_RTI); - xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr); - - buf_set_u32(&field0, 1, 1, xscale->hold_rst); - buf_set_u32(&field0, 2, 1, xscale->external_debug_break); - - fields[0].device = xscale->jtag_info.chain_pos; - fields[0].num_bits = 3; - fields[0].out_value = &field0; - fields[0].out_mask = NULL; - fields[0].in_value = NULL; - jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL); - - fields[1].device = xscale->jtag_info.chain_pos; - fields[1].num_bits = 32; - fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value; - fields[1].out_mask = NULL; - fields[1].in_value = NULL; - fields[1].in_handler = NULL; - fields[1].in_handler_priv = NULL; - fields[1].in_check_value = NULL; - fields[1].in_check_mask = NULL; - - - - fields[2].device = xscale->jtag_info.chain_pos; - fields[2].num_bits = 1; - fields[2].out_value = &field2; - fields[2].out_mask = NULL; - fields[2].in_value = NULL; - jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL); - - jtag_add_dr_scan(3, fields, -1, NULL); - - if ((retval = jtag_execute_queue()) != ERROR_OK) - { - ERROR("JTAG error while writing DCSR"); - return retval; - } - - xscale->reg_cache->reg_list[XSCALE_DCSR].dirty = 0; - xscale->reg_cache->reg_list[XSCALE_DCSR].valid = 1; - - return ERROR_OK; -} - -/* parity of the number of bits 0 if even; 1 if odd. for 32 bit words */ -unsigned int parity (unsigned int v) -{ - unsigned int ov = v; - v ^= v >> 16; - v ^= v >> 8; - v ^= v >> 4; - v &= 0xf; - DEBUG("parity of 0x%x is %i", ov, (0x6996 >> v) & 1); - return (0x6996 >> v) & 1; -} - -int xscale_load_ic(target_t *target, int mini, u32 va, u32 buffer[8]) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - u8 packet[4]; - u8 cmd; - int word; - - scan_field_t fields[2]; - - DEBUG("loading miniIC at 0x%8.8x", va); - - jtag_add_end_state(TAP_RTI); - xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.ldic); /* LDIC */ - - /* CMD is b010 for Main IC and b011 for Mini IC */ - if (mini) - buf_set_u32(&cmd, 0, 3, 0x3); - else - buf_set_u32(&cmd, 0, 3, 0x2); - - buf_set_u32(&cmd, 3, 3, 0x0); - - /* virtual address of desired cache line */ - buf_set_u32(packet, 0, 27, va >> 5); - - fields[0].device = xscale->jtag_info.chain_pos; - fields[0].num_bits = 6; - fields[0].out_value = &cmd; - fields[0].out_mask = NULL; - fields[0].in_value = NULL; - fields[0].in_check_value = NULL; - fields[0].in_check_mask = NULL; - fields[0].in_handler = NULL; - fields[0].in_handler_priv = NULL; - - fields[1].device = xscale->jtag_info.chain_pos; - fields[1].num_bits = 27; - fields[1].out_value = packet; - fields[1].out_mask = NULL; - fields[1].in_value = NULL; - fields[1].in_check_value = NULL; - fields[1].in_check_mask = NULL; - fields[1].in_handler = NULL; - fields[1].in_handler_priv = NULL; - - jtag_add_dr_scan(2, fields, -1, NULL); - - fields[0].num_bits = 32; - fields[0].out_value = packet; - - fields[1].num_bits = 1; - fields[1].out_value = &cmd; - - for (word = 0; word < 8; word++) - { - buf_set_u32(packet, 0, 32, buffer[word]); - cmd = parity(*((u32*)packet)); - jtag_add_dr_scan(2, fields, -1, NULL); - } - - jtag_execute_queue(); - - return ERROR_OK; -} - -int xscale_invalidate_ic_line(target_t *target, u32 va) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - u8 packet[4]; - u8 cmd; - - scan_field_t fields[2]; - - jtag_add_end_state(TAP_RTI); - xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.ldic); /* LDIC */ - - /* CMD for invalidate IC line b000, bits [6:4] b000 */ - buf_set_u32(&cmd, 0, 6, 0x0); - - /* virtual address of desired cache line */ - buf_set_u32(packet, 0, 27, va >> 5); - - fields[0].device = xscale->jtag_info.chain_pos; - fields[0].num_bits = 6; - fields[0].out_value = &cmd; - fields[0].out_mask = NULL; - fields[0].in_value = NULL; - fields[0].in_check_value = NULL; - fields[0].in_check_mask = NULL; - fields[0].in_handler = NULL; - fields[0].in_handler_priv = NULL; - - fields[1].device = xscale->jtag_info.chain_pos; - fields[1].num_bits = 27; - fields[1].out_value = packet; - fields[1].out_mask = NULL; - fields[1].in_value = NULL; - fields[1].in_check_value = NULL; - fields[1].in_check_mask = NULL; - fields[1].in_handler = NULL; - fields[1].in_handler_priv = NULL; - - jtag_add_dr_scan(2, fields, -1, NULL); - - return ERROR_OK; -} - -int xscale_update_vectors(target_t *target) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - int i; - - u32 low_reset_branch, high_reset_branch; - - for (i = 1; i < 8; i++) - { - /* if there's a static vector specified for this exception, override */ - if (xscale->static_high_vectors_set & (1 << i)) - { - xscale->high_vectors[i] = xscale->static_high_vectors[i]; - } - else - { - if (target_read_u32(target, 0xffff0000 + 4*i, &xscale->high_vectors[i]) != ERROR_OK) - { - xscale->high_vectors[i] = ARMV4_5_B(0xfffffe, 0); - } - } - } - - for (i = 1; i < 8; i++) - { - if (xscale->static_low_vectors_set & (1 << i)) - { - xscale->low_vectors[i] = xscale->static_low_vectors[i]; - } - else - { - if (target_read_u32(target, 0x0 + 4*i, &xscale->low_vectors[i]) != ERROR_OK) - { - xscale->low_vectors[i] = ARMV4_5_B(0xfffffe, 0); - } - } - } - - /* calculate branches to debug handler */ - low_reset_branch = (xscale->handler_address + 0x20 - 0x0 - 0x8) >> 2; - high_reset_branch = (xscale->handler_address + 0x20 - 0xffff0000 - 0x8) >> 2; - - xscale->low_vectors[0] = ARMV4_5_B((low_reset_branch & 0xffffff), 0); - xscale->high_vectors[0] = ARMV4_5_B((high_reset_branch & 0xffffff), 0); - - /* invalidate and load exception vectors in mini i-cache */ - xscale_invalidate_ic_line(target, 0x0); - xscale_invalidate_ic_line(target, 0xffff0000); - - xscale_load_ic(target, 1, 0x0, xscale->low_vectors); - xscale_load_ic(target, 1, 0xffff0000, xscale->high_vectors); - - return ERROR_OK; -} - -int xscale_arch_state(struct target_s *target) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - char *state[] = - { - "disabled", "enabled" - }; - - char *arch_dbg_reason[] = - { - "", "\n(processor reset)", "\n(trace buffer full)" - }; - - if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC) - { - ERROR("BUG: called for a non-ARMv4/5 target"); - exit(-1); - } - - USER("target halted in %s state due to %s, current mode: %s\n" - "cpsr: 0x%8.8x pc: 0x%8.8x\n" - "MMU: %s, D-Cache: %s, I-Cache: %s" - "%s", - armv4_5_state_strings[armv4_5->core_state], - target_debug_reason_strings[target->debug_reason], - armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)], - buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32), - buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32), - state[xscale->armv4_5_mmu.mmu_enabled], - state[xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled], - state[xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled], - arch_dbg_reason[xscale->arch_debug_reason]); - - return ERROR_OK; -} - -int xscale_poll(target_t *target) -{ - int retval=ERROR_OK; - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - if ((target->state == TARGET_RUNNING) || (target->state == TARGET_DEBUG_RUNNING)) - { - enum target_state previous_state = target->state; - if ((retval = xscale_read_tx(target, 0)) == ERROR_OK) - { - - /* there's data to read from the tx register, we entered debug state */ - xscale->handler_running = 1; - - target->state = TARGET_HALTED; - - /* process debug entry, fetching current mode regs */ - retval = xscale_debug_entry(target); - } - else if (retval != ERROR_TARGET_RESOURCE_NOT_AVAILABLE) - { - USER("error while polling TX register, reset CPU"); - /* here we "lie" so GDB won't get stuck and a reset can be perfomed */ - target->state = TARGET_HALTED; - } - - /* debug_entry could have overwritten target state (i.e. immediate resume) - * don't signal event handlers in that case - */ - if (target->state != TARGET_HALTED) - return ERROR_OK; - - /* if target was running, signal that we halted - * otherwise we reentered from debug execution */ - if (previous_state == TARGET_RUNNING) - target_call_event_callbacks(target, TARGET_EVENT_HALTED); - else - target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED); - } - return retval; -} - -int xscale_debug_entry(target_t *target) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - u32 pc; - u32 buffer[10]; - int i; - - u32 moe; - - /* clear external dbg break (will be written on next DCSR read) */ - xscale->external_debug_break = 0; - xscale_read_dcsr(target); - - /* get r0, pc, r1 to r7 and cpsr */ - xscale_receive(target, buffer, 10); - - /* move r0 from buffer to register cache */ - buf_set_u32(armv4_5->core_cache->reg_list[0].value, 0, 32, buffer[0]); - armv4_5->core_cache->reg_list[15].dirty = 1; - armv4_5->core_cache->reg_list[15].valid = 1; - DEBUG("r0: 0x%8.8x", buffer[0]); - - /* move pc from buffer to register cache */ - buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, buffer[1]); - armv4_5->core_cache->reg_list[15].dirty = 1; - armv4_5->core_cache->reg_list[15].valid = 1; - DEBUG("pc: 0x%8.8x", buffer[1]); - - /* move data from buffer to register cache */ - for (i = 1; i <= 7; i++) - { - buf_set_u32(armv4_5->core_cache->reg_list[i].value, 0, 32, buffer[1 + i]); - armv4_5->core_cache->reg_list[i].dirty = 1; - armv4_5->core_cache->reg_list[i].valid = 1; - DEBUG("r%i: 0x%8.8x", i, buffer[i + 1]); - } - - buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, buffer[9]); - armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1; - armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1; - DEBUG("cpsr: 0x%8.8x", buffer[9]); - - armv4_5->core_mode = buffer[9] & 0x1f; - if (armv4_5_mode_to_number(armv4_5->core_mode) == -1) - { - target->state = TARGET_UNKNOWN; - ERROR("cpsr contains invalid mode value - communication failure"); - return ERROR_TARGET_FAILURE; - } - DEBUG("target entered debug state in %s mode", armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)]); - - if (buffer[9] & 0x20) - armv4_5->core_state = ARMV4_5_STATE_THUMB; - else - armv4_5->core_state = ARMV4_5_STATE_ARM; - - /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */ - if ((armv4_5->core_mode != ARMV4_5_MODE_USR) && (armv4_5->core_mode != ARMV4_5_MODE_SYS)) - { - xscale_receive(target, buffer, 8); - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, buffer[7]); - ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).dirty = 0; - ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).valid = 1; - } - else - { - /* r8 to r14, but no spsr */ - xscale_receive(target, buffer, 7); - } - - /* move data from buffer to register cache */ - for (i = 8; i <= 14; i++) - { - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).value, 0, 32, buffer[i - 8]); - ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = 0; - ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid = 1; - } - - /* examine debug reason */ - xscale_read_dcsr(target); - moe = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 2, 3); - - /* stored PC (for calculating fixup) */ - pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); - - switch (moe) - { - case 0x0: /* Processor reset */ - target->debug_reason = DBG_REASON_DBGRQ; - xscale->arch_debug_reason = XSCALE_DBG_REASON_RESET; - pc -= 4; - break; - case 0x1: /* Instruction breakpoint hit */ - target->debug_reason = DBG_REASON_BREAKPOINT; - xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC; - pc -= 4; - break; - case 0x2: /* Data breakpoint hit */ - target->debug_reason = DBG_REASON_WATCHPOINT; - xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC; - pc -= 4; - break; - case 0x3: /* BKPT instruction executed */ - target->debug_reason = DBG_REASON_BREAKPOINT; - xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC; - pc -= 4; - break; - case 0x4: /* Ext. debug event */ - target->debug_reason = DBG_REASON_DBGRQ; - xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC; - pc -= 4; - break; - case 0x5: /* Vector trap occured */ - target->debug_reason = DBG_REASON_BREAKPOINT; - xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC; - pc -= 4; - break; - case 0x6: /* Trace buffer full break */ - target->debug_reason = DBG_REASON_DBGRQ; - xscale->arch_debug_reason = XSCALE_DBG_REASON_TB_FULL; - pc -= 4; - break; - case 0x7: /* Reserved */ - default: - ERROR("Method of Entry is 'Reserved'"); - exit(-1); - break; - } - - /* apply PC fixup */ - buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, pc); - - /* on the first debug entry, identify cache type */ - if (xscale->armv4_5_mmu.armv4_5_cache.ctype == -1) - { - u32 cache_type_reg; - - /* read cp15 cache type register */ - xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CACHETYPE]); - cache_type_reg = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CACHETYPE].value, 0, 32); - - armv4_5_identify_cache(cache_type_reg, &xscale->armv4_5_mmu.armv4_5_cache); - } - - /* examine MMU and Cache settings */ - /* read cp15 control register */ - xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]); - xscale->cp15_control_reg = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32); - xscale->armv4_5_mmu.mmu_enabled = (xscale->cp15_control_reg & 0x1U) ? 1 : 0; - xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (xscale->cp15_control_reg & 0x4U) ? 1 : 0; - xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (xscale->cp15_control_reg & 0x1000U) ? 1 : 0; - - /* tracing enabled, read collected trace data */ - if (xscale->trace.buffer_enabled) - { - xscale_read_trace(target); - xscale->trace.buffer_fill--; - - /* resume if we're still collecting trace data */ - if ((xscale->arch_debug_reason == XSCALE_DBG_REASON_TB_FULL) - && (xscale->trace.buffer_fill > 0)) - { - xscale_resume(target, 1, 0x0, 1, 0); - } - else - { - xscale->trace.buffer_enabled = 0; - } - } - - return ERROR_OK; -} - -int xscale_halt(target_t *target) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - DEBUG("target->state: %s", target_state_strings[target->state]); - - if (target->state == TARGET_HALTED) - { - WARNING("target was already halted"); - return ERROR_TARGET_ALREADY_HALTED; - } - else if (target->state == TARGET_UNKNOWN) - { - /* this must not happen for a xscale target */ - ERROR("target was in unknown state when halt was requested"); - return ERROR_TARGET_INVALID; - } - else if (target->state == TARGET_RESET) - { - DEBUG("target->state == TARGET_RESET"); - } - else - { - /* assert external dbg break */ - xscale->external_debug_break = 1; - xscale_read_dcsr(target); - - target->debug_reason = DBG_REASON_DBGRQ; - } - - return ERROR_OK; -} - -int xscale_enable_single_step(struct target_s *target, u32 next_pc) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale= armv4_5->arch_info; - reg_t *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0]; - - if (xscale->ibcr0_used) - { - breakpoint_t *ibcr0_bp = breakpoint_find(target, buf_get_u32(ibcr0->value, 0, 32) & 0xfffffffe); - - if (ibcr0_bp) - { - xscale_unset_breakpoint(target, ibcr0_bp); - } - else - { - ERROR("BUG: xscale->ibcr0_used is set, but no breakpoint with that address found"); - exit(-1); - } - } - - xscale_set_reg_u32(ibcr0, next_pc | 0x1); - - return ERROR_OK; -} - -int xscale_disable_single_step(struct target_s *target) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale= armv4_5->arch_info; - reg_t *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0]; - - xscale_set_reg_u32(ibcr0, 0x0); - - return ERROR_OK; -} - -int xscale_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale= armv4_5->arch_info; - breakpoint_t *breakpoint = target->breakpoints; - - u32 current_pc; - - int retval; - int i; - - DEBUG("-"); - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - if (!debug_execution) - { - target_free_all_working_areas(target); - } - - /* update vector tables */ - xscale_update_vectors(target); - - /* current = 1: continue on current pc, otherwise continue at <address> */ - if (!current) - buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address); - - current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); - - /* if we're at the reset vector, we have to simulate the branch */ - if (current_pc == 0x0) - { - arm_simulate_step(target, NULL); - current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); - } - - /* the front-end may request us not to handle breakpoints */ - if (handle_breakpoints) - { - if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)))) - { - u32 next_pc; - - /* there's a breakpoint at the current PC, we have to step over it */ - DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address); - xscale_unset_breakpoint(target, breakpoint); - - /* calculate PC of next instruction */ - if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK) - { - u32 current_opcode; - target_read_u32(target, current_pc, ¤t_opcode); - ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8x", current_opcode); - } - - DEBUG("enable single-step"); - xscale_enable_single_step(target, next_pc); - - /* restore banked registers */ - xscale_restore_context(target); - - /* send resume request (command 0x30 or 0x31) - * clean the trace buffer if it is to be enabled (0x62) */ - if (xscale->trace.buffer_enabled) - { - xscale_send_u32(target, 0x62); - xscale_send_u32(target, 0x31); - } - else - xscale_send_u32(target, 0x30); - - /* send CPSR */ - xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32)); - DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32)); - - for (i = 7; i >= 0; i--) - { - /* send register */ - xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32)); - DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32)); - } - - /* send PC */ - xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)); - DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)); - - /* wait for and process debug entry */ - xscale_debug_entry(target); - - DEBUG("disable single-step"); - xscale_disable_single_step(target); - - DEBUG("set breakpoint at 0x%8.8x", breakpoint->address); - xscale_set_breakpoint(target, breakpoint); - } - } - - /* enable any pending breakpoints and watchpoints */ - xscale_enable_breakpoints(target); - xscale_enable_watchpoints(target); - - /* restore banked registers */ - xscale_restore_context(target); - - /* send resume request (command 0x30 or 0x31) - * clean the trace buffer if it is to be enabled (0x62) */ - if (xscale->trace.buffer_enabled) - { - xscale_send_u32(target, 0x62); - xscale_send_u32(target, 0x31); - } - else - xscale_send_u32(target, 0x30); - - /* send CPSR */ - xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32)); - DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32)); - - for (i = 7; i >= 0; i--) - { - /* send register */ - xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32)); - DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32)); - } - - /* send PC */ - xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)); - DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)); - - target->debug_reason = DBG_REASON_NOTHALTED; - - if (!debug_execution) - { - /* registers are now invalid */ - armv4_5_invalidate_core_regs(target); - target->state = TARGET_RUNNING; - target_call_event_callbacks(target, TARGET_EVENT_RESUMED); - } - else - { - target->state = TARGET_DEBUG_RUNNING; - target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED); - } - - DEBUG("target resumed"); - - xscale->handler_running = 1; - - return ERROR_OK; -} - -int xscale_step(struct target_s *target, int current, u32 address, int handle_breakpoints) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - breakpoint_t *breakpoint = target->breakpoints; - - u32 current_pc, next_pc; - int i; - int retval; - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - /* current = 1: continue on current pc, otherwise continue at <address> */ - if (!current) - buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address); - - current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); - - /* if we're at the reset vector, we have to simulate the step */ - if (current_pc == 0x0) - { - arm_simulate_step(target, NULL); - current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); - - target->debug_reason = DBG_REASON_SINGLESTEP; - target_call_event_callbacks(target, TARGET_EVENT_HALTED); - - return ERROR_OK; - } - - /* the front-end may request us not to handle breakpoints */ - if (handle_breakpoints) - if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)))) - { - xscale_unset_breakpoint(target, breakpoint); - } - - target->debug_reason = DBG_REASON_SINGLESTEP; - - /* calculate PC of next instruction */ - if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK) - { - u32 current_opcode; - target_read_u32(target, current_pc, ¤t_opcode); - ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8x", current_opcode); - } - - DEBUG("enable single-step"); - xscale_enable_single_step(target, next_pc); - - /* restore banked registers */ - xscale_restore_context(target); - - /* send resume request (command 0x30 or 0x31) - * clean the trace buffer if it is to be enabled (0x62) */ - if (xscale->trace.buffer_enabled) - { - xscale_send_u32(target, 0x62); - xscale_send_u32(target, 0x31); - } - else - xscale_send_u32(target, 0x30); - - /* send CPSR */ - xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32)); - DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32)); - - for (i = 7; i >= 0; i--) - { - /* send register */ - xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32)); - DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32)); - } - - /* send PC */ - xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)); - DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32)); - - target_call_event_callbacks(target, TARGET_EVENT_RESUMED); - - /* registers are now invalid */ - armv4_5_invalidate_core_regs(target); - - /* wait for and process debug entry */ - xscale_debug_entry(target); - - DEBUG("disable single-step"); - xscale_disable_single_step(target); - - target_call_event_callbacks(target, TARGET_EVENT_HALTED); - - if (breakpoint) - { - xscale_set_breakpoint(target, breakpoint); - } - - DEBUG("target stepped"); - - return ERROR_OK; - -} - -int xscale_assert_reset(target_t *target) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - DEBUG("target->state: %s", target_state_strings[target->state]); - - /* select DCSR instruction (set endstate to R-T-I to ensure we don't - * end up in T-L-R, which would reset JTAG - */ - jtag_add_end_state(TAP_RTI); - xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr); - - /* set Hold reset, Halt mode and Trap Reset */ - buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1); - buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1); - xscale_write_dcsr(target, 1, 0); - - /* select BYPASS, because having DCSR selected caused problems on the PXA27x */ - xscale_jtag_set_instr(xscale->jtag_info.chain_pos, 0x7f); - jtag_execute_queue(); - - /* assert reset */ - jtag_add_reset(0, 1); - - /* sleep 1ms, to be sure we fulfill any requirements */ - jtag_add_sleep(1000); - jtag_execute_queue(); - - target->state = TARGET_RESET; - - return ERROR_OK; -} - -int xscale_deassert_reset(target_t *target) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - fileio_t debug_handler; - u32 address; - u32 binary_size; - - u32 buf_cnt; - int i; - int retval; - - breakpoint_t *breakpoint = target->breakpoints; - - DEBUG("-"); - - xscale->ibcr_available = 2; - xscale->ibcr0_used = 0; - xscale->ibcr1_used = 0; - - xscale->dbr_available = 2; - xscale->dbr0_used = 0; - xscale->dbr1_used = 0; - - /* mark all hardware breakpoints as unset */ - while (breakpoint) - { - if (breakpoint->type == BKPT_HARD) - { - breakpoint->set = 0; - } - breakpoint = breakpoint->next; - } - - if (!xscale->handler_installed) - { - /* release SRST */ - jtag_add_reset(0, 0); - - /* wait 300ms; 150 and 100ms were not enough */ - jtag_add_sleep(300*1000); - - jtag_add_runtest(2030, TAP_RTI); - jtag_execute_queue(); - - /* set Hold reset, Halt mode and Trap Reset */ - buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1); - buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1); - xscale_write_dcsr(target, 1, 0); - - /* Load debug handler */ - if (fileio_open(&debug_handler, PKGLIBDIR "/xscale/debug_handler.bin", FILEIO_READ, FILEIO_BINARY) != ERROR_OK) - { - ERROR("file open error: %s", debug_handler.error_str); - return ERROR_OK; - } - - if ((binary_size = debug_handler.size) % 4) - { - ERROR("debug_handler.bin: size not a multiple of 4"); - exit(-1); - } - - if (binary_size > 0x800) - { - ERROR("debug_handler.bin: larger than 2kb"); - exit(-1); - } - - binary_size = CEIL(binary_size, 32) * 32; - - address = xscale->handler_address; - while (binary_size > 0) - { - u32 cache_line[8]; - u8 buffer[32]; - - if ((retval = fileio_read(&debug_handler, 32, buffer, &buf_cnt)) != ERROR_OK) - { - ERROR("reading debug handler failed: %s", debug_handler.error_str); - } - - for (i = 0; i < buf_cnt; i += 4) - { - /* convert LE buffer to host-endian u32 */ - cache_line[i / 4] = le_to_h_u32(&buffer[i]); - } - - for (; buf_cnt < 32; buf_cnt += 4) - { - cache_line[buf_cnt / 4] = 0xe1a08008; - } - - /* only load addresses other than the reset vectors */ - if ((address % 0x400) != 0x0) - { - xscale_load_ic(target, 1, address, cache_line); - } - - address += buf_cnt; - binary_size -= buf_cnt; - }; - - xscale_load_ic(target, 1, 0x0, xscale->low_vectors); - xscale_load_ic(target, 1, 0xffff0000, xscale->high_vectors); - - jtag_add_runtest(30, TAP_RTI); - - jtag_add_sleep(100000); - - /* set Hold reset, Halt mode and Trap Reset */ - buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1); - buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1); - xscale_write_dcsr(target, 1, 0); - - /* clear Hold reset to let the target run (should enter debug handler) */ - xscale_write_dcsr(target, 0, 1); - target->state = TARGET_RUNNING; - - if ((target->reset_mode != RESET_HALT) && (target->reset_mode != RESET_INIT)) - { - jtag_add_sleep(10000); - - /* we should have entered debug now */ - xscale_debug_entry(target); - target->state = TARGET_HALTED; - - /* resume the target */ - xscale_resume(target, 1, 0x0, 1, 0); - } - - fileio_close(&debug_handler); - } - else - { - jtag_add_reset(0, 0); - } - - - return ERROR_OK; -} - -int xscale_soft_reset_halt(struct target_s *target) -{ - - return ERROR_OK; -} - -int xscale_prepare_reset_halt(struct target_s *target) -{ - /* nothing to be done for reset_halt on XScale targets - * we always halt after a reset to upload the debug handler - */ - return ERROR_OK; -} - -int xscale_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode) -{ - - return ERROR_OK; -} - -int xscale_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, u32 value) -{ - - return ERROR_OK; -} - -int xscale_full_context(target_t *target) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - - u32 *buffer; - - int i, j; - - DEBUG("-"); - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - buffer = malloc(4 * 8); - - /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS) - * we can't enter User mode on an XScale (unpredictable), - * but User shares registers with SYS - */ - for(i = 1; i < 7; i++) - { - int valid = 1; - - /* check if there are invalid registers in the current mode - */ - for (j = 0; j <= 16; j++) - { - if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid == 0) - valid = 0; - } - - if (!valid) - { - u32 tmp_cpsr; - - /* request banked registers */ - xscale_send_u32(target, 0x0); - - tmp_cpsr = 0x0; - tmp_cpsr |= armv4_5_number_to_mode(i); - tmp_cpsr |= 0xc0; /* I/F bits */ - - /* send CPSR for desired mode */ - xscale_send_u32(target, tmp_cpsr); - - /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */ - if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS)) - { - xscale_receive(target, buffer, 8); - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, buffer[7]); - ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0; - ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).valid = 1; - } - else - { - xscale_receive(target, buffer, 7); - } - - /* move data from buffer to register cache */ - for (j = 8; j <= 14; j++) - { - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).value, 0, 32, buffer[j - 8]); - ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0; - ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid = 1; - } - } - } - - free(buffer); - - return ERROR_OK; -} - -int xscale_restore_context(target_t *target) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - - int i, j; - - DEBUG("-"); - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS) - * we can't enter User mode on an XScale (unpredictable), - * but User shares registers with SYS - */ - for(i = 1; i < 7; i++) - { - int dirty = 0; - - /* check if there are invalid registers in the current mode - */ - for (j = 8; j <= 14; j++) - { - if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty == 1) - dirty = 1; - } - - /* if not USR/SYS, check if the SPSR needs to be written */ - if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS)) - { - if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty == 1) - dirty = 1; - } - - if (dirty) - { - u32 tmp_cpsr; - - /* send banked registers */ - xscale_send_u32(target, 0x1); - - tmp_cpsr = 0x0; - tmp_cpsr |= armv4_5_number_to_mode(i); - tmp_cpsr |= 0xc0; /* I/F bits */ - - /* send CPSR for desired mode */ - xscale_send_u32(target, tmp_cpsr); - - /* send banked registers, r8 to r14, and spsr if not in USR/SYS mode */ - for (j = 8; j <= 14; j++) - { - xscale_send_u32(target, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, j).value, 0, 32)); - ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0; - } - - if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS)) - { - xscale_send_u32(target, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32)); - ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0; - } - } - } - - return ERROR_OK; -} - -int xscale_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - u32 *buf32; - int i; - - DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count); - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - /* sanitize arguments */ - if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer)) - return ERROR_INVALID_ARGUMENTS; - - if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u))) - return ERROR_TARGET_UNALIGNED_ACCESS; - - /* send memory read request (command 0x1n, n: access size) */ - xscale_send_u32(target, 0x10 | size); - - /* send base address for read request */ - xscale_send_u32(target, address); - - /* send number of requested data words */ - xscale_send_u32(target, count); - - /* receive data from target (count times 32-bit words in host endianness) */ - buf32 = malloc(4 * count); - xscale_receive(target, buf32, count); - - /* extract data from host-endian buffer into byte stream */ - for (i = 0; i < count; i++) - { - switch (size) - { - case 4: - target_buffer_set_u32(target, buffer, buf32[i]); - buffer += 4; - break; - case 2: - target_buffer_set_u16(target, buffer, buf32[i] & 0xffff); - buffer += 2; - break; - case 1: - *buffer++ = buf32[i] & 0xff; - break; - default: - ERROR("should never get here"); - exit(-1); - } - } - - free(buf32); - - /* examine DCSR, to see if Sticky Abort (SA) got set */ - xscale_read_dcsr(target); - if (buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 5, 1) == 1) - { - /* clear SA bit */ - xscale_send_u32(target, 0x60); - - return ERROR_TARGET_DATA_ABORT; - } - - return ERROR_OK; -} - -int xscale_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count); - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - /* sanitize arguments */ - if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer)) - return ERROR_INVALID_ARGUMENTS; - - if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u))) - return ERROR_TARGET_UNALIGNED_ACCESS; - - /* send memory write request (command 0x2n, n: access size) */ - xscale_send_u32(target, 0x20 | size); - - /* send base address for read request */ - xscale_send_u32(target, address); - - /* send number of requested data words to be written*/ - xscale_send_u32(target, count); - - /* extract data from host-endian buffer into byte stream */ -#if 0 - for (i = 0; i < count; i++) - { - switch (size) - { - case 4: - value = target_buffer_get_u32(target, buffer); - xscale_send_u32(target, value); - buffer += 4; - break; - case 2: - value = target_buffer_get_u16(target, buffer); - xscale_send_u32(target, value); - buffer += 2; - break; - case 1: - value = *buffer; - xscale_send_u32(target, value); - buffer += 1; - break; - default: - ERROR("should never get here"); - exit(-1); - } - } -#endif - xscale_send(target, buffer, count, size); - - /* examine DCSR, to see if Sticky Abort (SA) got set */ - xscale_read_dcsr(target); - if (buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 5, 1) == 1) - { - /* clear SA bit */ - xscale_send_u32(target, 0x60); - - return ERROR_TARGET_DATA_ABORT; - } - - return ERROR_OK; -} - -int xscale_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer) -{ - return xscale_write_memory(target, address, 4, count, buffer); -} - -int xscale_checksum_memory(struct target_s *target, u32 address, u32 count, u32* checksum) -{ - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; -} - -u32 xscale_get_ttb(target_t *target) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - u32 ttb; - - xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_TTB]); - ttb = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_TTB].value, 0, 32); - - return ttb; -} - -void xscale_disable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - u32 cp15_control; - - /* read cp15 control register */ - xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]); - cp15_control = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32); - - if (mmu) - cp15_control &= ~0x1U; - - if (d_u_cache) - { - /* clean DCache */ - xscale_send_u32(target, 0x50); - xscale_send_u32(target, xscale->cache_clean_address); - - /* invalidate DCache */ - xscale_send_u32(target, 0x51); - - cp15_control &= ~0x4U; - } - - if (i_cache) - { - /* invalidate ICache */ - xscale_send_u32(target, 0x52); - cp15_control &= ~0x1000U; - } - - /* write new cp15 control register */ - xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_CTRL], cp15_control); - - /* execute cpwait to ensure outstanding operations complete */ - xscale_send_u32(target, 0x53); -} - -void xscale_enable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - u32 cp15_control; - - /* read cp15 control register */ - xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]); - cp15_control = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32); - - if (mmu) - cp15_control |= 0x1U; - - if (d_u_cache) - cp15_control |= 0x4U; - - if (i_cache) - cp15_control |= 0x1000U; - - /* write new cp15 control register */ - xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_CTRL], cp15_control); - - /* execute cpwait to ensure outstanding operations complete */ - xscale_send_u32(target, 0x53); -} - -int xscale_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - if (xscale->force_hw_bkpts) - breakpoint->type = BKPT_HARD; - - if (breakpoint->set) - { - WARNING("breakpoint already set"); - return ERROR_OK; - } - - if (breakpoint->type == BKPT_HARD) - { - u32 value = breakpoint->address | 1; - if (!xscale->ibcr0_used) - { - xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR0], value); - xscale->ibcr0_used = 1; - breakpoint->set = 1; /* breakpoint set on first breakpoint register */ - } - else if (!xscale->ibcr1_used) - { - xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR1], value); - xscale->ibcr1_used = 1; - breakpoint->set = 2; /* breakpoint set on second breakpoint register */ - } - else - { - ERROR("BUG: no hardware comparator available"); - return ERROR_OK; - } - } - else if (breakpoint->type == BKPT_SOFT) - { - if (breakpoint->length == 4) - { - /* keep the original instruction in target endianness */ - target->type->read_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr); - /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */ - target_write_u32(target, breakpoint->address, xscale->arm_bkpt); - } - else - { - /* keep the original instruction in target endianness */ - target->type->read_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr); - /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */ - target_write_u32(target, breakpoint->address, xscale->thumb_bkpt); - } - breakpoint->set = 1; - } - - return ERROR_OK; - -} - -int xscale_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - if (xscale->force_hw_bkpts) - { - DEBUG("forcing use of hardware breakpoint at address 0x%8.8x", breakpoint->address); - breakpoint->type = BKPT_HARD; - } - - if ((breakpoint->type == BKPT_HARD) && (xscale->ibcr_available < 1)) - { - INFO("no breakpoint unit available for hardware breakpoint"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - else - { - xscale->ibcr_available--; - } - - if ((breakpoint->length != 2) && (breakpoint->length != 4)) - { - INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - - return ERROR_OK; -} - -int xscale_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - if (!breakpoint->set) - { - WARNING("breakpoint not set"); - return ERROR_OK; - } - - if (breakpoint->type == BKPT_HARD) - { - if (breakpoint->set == 1) - { - xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR0], 0x0); - xscale->ibcr0_used = 0; - } - else if (breakpoint->set == 2) - { - xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR1], 0x0); - xscale->ibcr1_used = 0; - } - breakpoint->set = 0; - } - else - { - /* restore original instruction (kept in target endianness) */ - if (breakpoint->length == 4) - { - target->type->write_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr); - } - else - { - target->type->write_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr); - } - breakpoint->set = 0; - } - - return ERROR_OK; -} - -int xscale_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - if (breakpoint->set) - { - xscale_unset_breakpoint(target, breakpoint); - } - - if (breakpoint->type == BKPT_HARD) - xscale->ibcr_available++; - - return ERROR_OK; -} - -int xscale_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - u8 enable = 0; - reg_t *dbcon = &xscale->reg_cache->reg_list[XSCALE_DBCON]; - u32 dbcon_value = buf_get_u32(dbcon->value, 0, 32); - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - xscale_get_reg(dbcon); - - switch (watchpoint->rw) - { - case WPT_READ: - enable = 0x3; - break; - case WPT_ACCESS: - enable = 0x2; - break; - case WPT_WRITE: - enable = 0x1; - break; - default: - ERROR("BUG: watchpoint->rw neither read, write nor access"); - } - - if (!xscale->dbr0_used) - { - xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR0], watchpoint->address); - dbcon_value |= enable; - xscale_set_reg_u32(dbcon, dbcon_value); - watchpoint->set = 1; - xscale->dbr0_used = 1; - } - else if (!xscale->dbr1_used) - { - xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR1], watchpoint->address); - dbcon_value |= enable << 2; - xscale_set_reg_u32(dbcon, dbcon_value); - watchpoint->set = 2; - xscale->dbr1_used = 1; - } - else - { - ERROR("BUG: no hardware comparator available"); - return ERROR_OK; - } - - return ERROR_OK; -} - -int xscale_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - if (xscale->dbr_available < 1) - { - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - - if ((watchpoint->length != 1) && (watchpoint->length != 2) && (watchpoint->length != 4)) - { - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - - xscale->dbr_available--; - - return ERROR_OK; -} - -int xscale_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - reg_t *dbcon = &xscale->reg_cache->reg_list[XSCALE_DBCON]; - u32 dbcon_value = buf_get_u32(dbcon->value, 0, 32); - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - if (!watchpoint->set) - { - WARNING("breakpoint not set"); - return ERROR_OK; - } - - if (watchpoint->set == 1) - { - dbcon_value &= ~0x3; - xscale_set_reg_u32(dbcon, dbcon_value); - xscale->dbr0_used = 0; - } - else if (watchpoint->set == 2) - { - dbcon_value &= ~0xc; - xscale_set_reg_u32(dbcon, dbcon_value); - xscale->dbr1_used = 0; - } - watchpoint->set = 0; - - return ERROR_OK; -} - -int xscale_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - if (target->state != TARGET_HALTED) - { - WARNING("target not halted"); - return ERROR_TARGET_NOT_HALTED; - } - - if (watchpoint->set) - { - xscale_unset_watchpoint(target, watchpoint); - } - - xscale->dbr_available++; - - return ERROR_OK; -} - -void xscale_enable_watchpoints(struct target_s *target) -{ - watchpoint_t *watchpoint = target->watchpoints; - - while (watchpoint) - { - if (watchpoint->set == 0) - xscale_set_watchpoint(target, watchpoint); - watchpoint = watchpoint->next; - } -} - -void xscale_enable_breakpoints(struct target_s *target) -{ - breakpoint_t *breakpoint = target->breakpoints; - - /* set any pending breakpoints */ - while (breakpoint) - { - if (breakpoint->set == 0) - xscale_set_breakpoint(target, breakpoint); - breakpoint = breakpoint->next; - } -} - -int xscale_get_reg(reg_t *reg) -{ - xscale_reg_t *arch_info = reg->arch_info; - target_t *target = arch_info->target; - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - /* DCSR, TX and RX are accessible via JTAG */ - if (strcmp(reg->name, "XSCALE_DCSR") == 0) - { - return xscale_read_dcsr(arch_info->target); - } - else if (strcmp(reg->name, "XSCALE_TX") == 0) - { - /* 1 = consume register content */ - return xscale_read_tx(arch_info->target, 1); - } - else if (strcmp(reg->name, "XSCALE_RX") == 0) - { - /* can't read from RX register (host -> debug handler) */ - return ERROR_OK; - } - else if (strcmp(reg->name, "XSCALE_TXRXCTRL") == 0) - { - /* can't (explicitly) read from TXRXCTRL register */ - return ERROR_OK; - } - else /* Other DBG registers have to be transfered by the debug handler */ - { - /* send CP read request (command 0x40) */ - xscale_send_u32(target, 0x40); - - /* send CP register number */ - xscale_send_u32(target, arch_info->dbg_handler_number); - - /* read register value */ - xscale_read_tx(target, 1); - buf_cpy(xscale->reg_cache->reg_list[XSCALE_TX].value, reg->value, 32); - - reg->dirty = 0; - reg->valid = 1; - } - - return ERROR_OK; -} - -int xscale_set_reg(reg_t *reg, u8* buf) -{ - xscale_reg_t *arch_info = reg->arch_info; - target_t *target = arch_info->target; - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - u32 value = buf_get_u32(buf, 0, 32); - - /* DCSR, TX and RX are accessible via JTAG */ - if (strcmp(reg->name, "XSCALE_DCSR") == 0) - { - buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 0, 32, value); - return xscale_write_dcsr(arch_info->target, -1, -1); - } - else if (strcmp(reg->name, "XSCALE_RX") == 0) - { - buf_set_u32(xscale->reg_cache->reg_list[XSCALE_RX].value, 0, 32, value); - return xscale_write_rx(arch_info->target); - } - else if (strcmp(reg->name, "XSCALE_TX") == 0) - { - /* can't write to TX register (debug-handler -> host) */ - return ERROR_OK; - } - else if (strcmp(reg->name, "XSCALE_TXRXCTRL") == 0) - { - /* can't (explicitly) write to TXRXCTRL register */ - return ERROR_OK; - } - else /* Other DBG registers have to be transfered by the debug handler */ - { - /* send CP write request (command 0x41) */ - xscale_send_u32(target, 0x41); - - /* send CP register number */ - xscale_send_u32(target, arch_info->dbg_handler_number); - - /* send CP register value */ - xscale_send_u32(target, value); - buf_set_u32(reg->value, 0, 32, value); - } - - return ERROR_OK; -} - -/* convenience wrapper to access XScale specific registers */ -int xscale_set_reg_u32(reg_t *reg, u32 value) -{ - u8 buf[4]; - - buf_set_u32(buf, 0, 32, value); - - return xscale_set_reg(reg, buf); -} - -int xscale_write_dcsr_sw(target_t *target, u32 value) -{ - /* get pointers to arch-specific information */ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - reg_t *dcsr = &xscale->reg_cache->reg_list[XSCALE_DCSR]; - xscale_reg_t *dcsr_arch_info = dcsr->arch_info; - - /* send CP write request (command 0x41) */ - xscale_send_u32(target, 0x41); - - /* send CP register number */ - xscale_send_u32(target, dcsr_arch_info->dbg_handler_number); - - /* send CP register value */ - xscale_send_u32(target, value); - buf_set_u32(dcsr->value, 0, 32, value); - - return ERROR_OK; -} - -int xscale_read_trace(target_t *target) -{ - /* get pointers to arch-specific information */ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - xscale_trace_data_t **trace_data_p; - - /* 258 words from debug handler - * 256 trace buffer entries - * 2 checkpoint addresses - */ - u32 trace_buffer[258]; - int is_address[256]; - int i, j; - - if (target->state != TARGET_HALTED) - { - WARNING("target must be stopped to read trace data"); - return ERROR_TARGET_NOT_HALTED; - } - - /* send read trace buffer command (command 0x61) */ - xscale_send_u32(target, 0x61); - - /* receive trace buffer content */ - xscale_receive(target, trace_buffer, 258); - - /* parse buffer backwards to identify address entries */ - for (i = 255; i >= 0; i--) - { - is_address[i] = 0; - if (((trace_buffer[i] & 0xf0) == 0x90) || - ((trace_buffer[i] & 0xf0) == 0xd0)) - { - if (i >= 3) - is_address[--i] = 1; - if (i >= 2) - is_address[--i] = 1; - if (i >= 1) - is_address[--i] = 1; - if (i >= 0) - is_address[--i] = 1; - } - } - - - /* search first non-zero entry */ - for (j = 0; (j < 256) && (trace_buffer[j] == 0) && (!is_address[j]); j++) - ; - - if (j == 256) - { - DEBUG("no trace data collected"); - return ERROR_XSCALE_NO_TRACE_DATA; - } - - for (trace_data_p = &xscale->trace.data; *trace_data_p; trace_data_p = &(*trace_data_p)->next) - ; - - *trace_data_p = malloc(sizeof(xscale_trace_data_t)); - (*trace_data_p)->next = NULL; - (*trace_data_p)->chkpt0 = trace_buffer[256]; - (*trace_data_p)->chkpt1 = trace_buffer[257]; - (*trace_data_p)->last_instruction = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); - (*trace_data_p)->entries = malloc(sizeof(xscale_trace_entry_t) * (256 - j)); - (*trace_data_p)->depth = 256 - j; - - for (i = j; i < 256; i++) - { - (*trace_data_p)->entries[i - j].data = trace_buffer[i]; - if (is_address[i]) - (*trace_data_p)->entries[i - j].type = XSCALE_TRACE_ADDRESS; - else - (*trace_data_p)->entries[i - j].type = XSCALE_TRACE_MESSAGE; - } - - return ERROR_OK; -} - -int xscale_read_instruction(target_t *target, arm_instruction_t *instruction) -{ - /* get pointers to arch-specific information */ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - int i; - int section = -1; - u32 size_read; - u32 opcode; - int retval; - - if (!xscale->trace.image) - return ERROR_TRACE_IMAGE_UNAVAILABLE; - - /* search for the section the current instruction belongs to */ - for (i = 0; i < xscale->trace.image->num_sections; i++) - { - if ((xscale->trace.image->sections[i].base_address <= xscale->trace.current_pc) && - (xscale->trace.image->sections[i].base_address + xscale->trace.image->sections[i].size > xscale->trace.current_pc)) - { - section = i; - break; - } - } - - if (section == -1) - { - /* current instruction couldn't be found in the image */ - return ERROR_TRACE_INSTRUCTION_UNAVAILABLE; - } - - if (xscale->trace.core_state == ARMV4_5_STATE_ARM) - { - u8 buf[4]; - if ((retval = image_read_section(xscale->trace.image, section, - xscale->trace.current_pc - xscale->trace.image->sections[section].base_address, - 4, buf, &size_read)) != ERROR_OK) - { - ERROR("error while reading instruction: %i", retval); - return ERROR_TRACE_INSTRUCTION_UNAVAILABLE; - } - opcode = target_buffer_get_u32(target, buf); - arm_evaluate_opcode(opcode, xscale->trace.current_pc, instruction); - } - else if (xscale->trace.core_state == ARMV4_5_STATE_THUMB) - { - u8 buf[2]; - if ((retval = image_read_section(xscale->trace.image, section, - xscale->trace.current_pc - xscale->trace.image->sections[section].base_address, - 2, buf, &size_read)) != ERROR_OK) - { - ERROR("error while reading instruction: %i", retval); - return ERROR_TRACE_INSTRUCTION_UNAVAILABLE; - } - opcode = target_buffer_get_u16(target, buf); - thumb_evaluate_opcode(opcode, xscale->trace.current_pc, instruction); - } - else - { - ERROR("BUG: unknown core state encountered"); - exit(-1); - } - - return ERROR_OK; -} - -int xscale_branch_address(xscale_trace_data_t *trace_data, int i, u32 *target) -{ - /* if there are less than four entries prior to the indirect branch message - * we can't extract the address */ - if (i < 4) - { - return -1; - } - - *target = (trace_data->entries[i-1].data) | (trace_data->entries[i-2].data << 8) | - (trace_data->entries[i-3].data << 16) | (trace_data->entries[i-4].data << 24); - - return 0; -} - -int xscale_analyze_trace(target_t *target, command_context_t *cmd_ctx) -{ - /* get pointers to arch-specific information */ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - int next_pc_ok = 0; - u32 next_pc = 0x0; - xscale_trace_data_t *trace_data = xscale->trace.data; - int retval; - - while (trace_data) - { - int i, chkpt; - int rollover; - int branch; - int exception; - xscale->trace.core_state = ARMV4_5_STATE_ARM; - - chkpt = 0; - rollover = 0; - - for (i = 0; i < trace_data->depth; i++) - { - next_pc_ok = 0; - branch = 0; - exception = 0; - - if (trace_data->entries[i].type == XSCALE_TRACE_ADDRESS) - continue; - - switch ((trace_data->entries[i].data & 0xf0) >> 4) - { - case 0: /* Exceptions */ - case 1: - case 2: - case 3: - case 4: - case 5: - case 6: - case 7: - exception = (trace_data->entries[i].data & 0x70) >> 4; - next_pc_ok = 1; - next_pc = (trace_data->entries[i].data & 0xf0) >> 2; - command_print(cmd_ctx, "--- exception %i ---", (trace_data->entries[i].data & 0xf0) >> 4); - break; - case 8: /* Direct Branch */ - branch = 1; - break; - case 9: /* Indirect Branch */ - branch = 1; - if (xscale_branch_address(trace_data, i, &next_pc) == 0) - { - next_pc_ok = 1; - } - break; - case 13: /* Checkpointed Indirect Branch */ - if (xscale_branch_address(trace_data, i, &next_pc) == 0) - { - next_pc_ok = 1; - if (((chkpt == 0) && (next_pc != trace_data->chkpt0)) - || ((chkpt == 1) && (next_pc != trace_data->chkpt1))) - WARNING("checkpointed indirect branch target address doesn't match checkpoint"); - } - /* explicit fall-through */ - case 12: /* Checkpointed Direct Branch */ - branch = 1; - if (chkpt == 0) - { - next_pc_ok = 1; - next_pc = trace_data->chkpt0; - chkpt++; - } - else if (chkpt == 1) - { - next_pc_ok = 1; - next_pc = trace_data->chkpt0; - chkpt++; - } - else - { - WARNING("more than two checkpointed branches encountered"); - } - break; - case 15: /* Roll-over */ - rollover++; - continue; - default: /* Reserved */ - command_print(cmd_ctx, "--- reserved trace message ---"); - ERROR("BUG: trace message %i is reserved", (trace_data->entries[i].data & 0xf0) >> 4); - return ERROR_OK; - } - - if (xscale->trace.pc_ok) - { - int executed = (trace_data->entries[i].data & 0xf) + rollover * 16; - arm_instruction_t instruction; - - if ((exception == 6) || (exception == 7)) - { - /* IRQ or FIQ exception, no instruction executed */ - executed -= 1; - } - - while (executed-- >= 0) - { - if ((retval = xscale_read_instruction(target, &instruction)) != ERROR_OK) - { - /* can't continue tracing with no image available */ - if (retval == ERROR_TRACE_IMAGE_UNAVAILABLE) - { - return retval; - } - else if (retval == ERROR_TRACE_INSTRUCTION_UNAVAILABLE) - { - /* TODO: handle incomplete images */ - } - } - - /* a precise abort on a load to the PC is included in the incremental - * word count, other instructions causing data aborts are not included - */ - if ((executed == 0) && (exception == 4) - && ((instruction.type >= ARM_LDR) && (instruction.type <= ARM_LDM))) - { - if ((instruction.type == ARM_LDM) - && ((instruction.info.load_store_multiple.register_list & 0x8000) == 0)) - { - executed--; - } - else if (((instruction.type >= ARM_LDR) && (instruction.type <= ARM_LDRSH)) - && (instruction.info.load_store.Rd != 15)) - { - executed--; - } - } - - /* only the last instruction executed - * (the one that caused the control flow change) - * could be a taken branch - */ - if (((executed == -1) && (branch == 1)) && - (((instruction.type == ARM_B) || - (instruction.type == ARM_BL) || - (instruction.type == ARM_BLX)) && - (instruction.info.b_bl_bx_blx.target_address != -1))) - { - xscale->trace.current_pc = instruction.info.b_bl_bx_blx.target_address; - } - else - { - xscale->trace.current_pc += (xscale->trace.core_state == ARMV4_5_STATE_ARM) ? 4 : 2; - } - command_print(cmd_ctx, "%s", instruction.text); - } - - rollover = 0; - } - - if (next_pc_ok) - { - xscale->trace.current_pc = next_pc; - xscale->trace.pc_ok = 1; - } - } - - for (; xscale->trace.current_pc < trace_data->last_instruction; xscale->trace.current_pc += (xscale->trace.core_state == ARMV4_5_STATE_ARM) ? 4 : 2) - { - arm_instruction_t instruction; - if ((retval = xscale_read_instruction(target, &instruction)) != ERROR_OK) - { - /* can't continue tracing with no image available */ - if (retval == ERROR_TRACE_IMAGE_UNAVAILABLE) - { - return retval; - } - else if (retval == ERROR_TRACE_INSTRUCTION_UNAVAILABLE) - { - /* TODO: handle incomplete images */ - } - } - command_print(cmd_ctx, "%s", instruction.text); - } - - trace_data = trace_data->next; - } - - return ERROR_OK; -} - -void xscale_build_reg_cache(target_t *target) -{ - /* get pointers to arch-specific information */ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache); - xscale_reg_t *arch_info = malloc(sizeof(xscale_reg_arch_info)); - int i; - int num_regs = sizeof(xscale_reg_arch_info) / sizeof(xscale_reg_t); - - (*cache_p) = armv4_5_build_reg_cache(target, armv4_5); - armv4_5->core_cache = (*cache_p); - - /* register a register arch-type for XScale dbg registers only once */ - if (xscale_reg_arch_type == -1) - xscale_reg_arch_type = register_reg_arch_type(xscale_get_reg, xscale_set_reg); - - (*cache_p)->next = malloc(sizeof(reg_cache_t)); - cache_p = &(*cache_p)->next; - - /* fill in values for the xscale reg cache */ - (*cache_p)->name = "XScale registers"; - (*cache_p)->next = NULL; - (*cache_p)->reg_list = malloc(num_regs * sizeof(reg_t)); - (*cache_p)->num_regs = num_regs; - - for (i = 0; i < num_regs; i++) - { - (*cache_p)->reg_list[i].name = xscale_reg_list[i]; - (*cache_p)->reg_list[i].value = calloc(4, 1); - (*cache_p)->reg_list[i].dirty = 0; - (*cache_p)->reg_list[i].valid = 0; - (*cache_p)->reg_list[i].size = 32; - (*cache_p)->reg_list[i].bitfield_desc = NULL; - (*cache_p)->reg_list[i].num_bitfields = 0; - (*cache_p)->reg_list[i].arch_info = &arch_info[i]; - (*cache_p)->reg_list[i].arch_type = xscale_reg_arch_type; - arch_info[i] = xscale_reg_arch_info[i]; - arch_info[i].target = target; - } - - xscale->reg_cache = (*cache_p); -} - -int xscale_init_target(struct command_context_s *cmd_ctx, struct target_s *target) -{ - if (startup_mode != DAEMON_RESET) - { - ERROR("XScale target requires a reset"); - ERROR("Reset target to enable debug"); - } - - /* assert TRST once during startup */ - jtag_add_reset(1, 0); - jtag_add_sleep(5000); - jtag_add_reset(0, 0); - jtag_execute_queue(); - - return ERROR_OK; -} - -int xscale_quit() -{ - - return ERROR_OK; -} - -int xscale_init_arch_info(target_t *target, xscale_common_t *xscale, int chain_pos, char *variant) -{ - armv4_5_common_t *armv4_5; - u32 high_reset_branch, low_reset_branch; - int i; - - armv4_5 = &xscale->armv4_5_common; - - /* store architecture specfic data (none so far) */ - xscale->arch_info = NULL; - xscale->common_magic = XSCALE_COMMON_MAGIC; - - /* remember the variant (PXA25x, PXA27x, IXP42x, ...) */ - xscale->variant = strdup(variant); - - /* prepare JTAG information for the new target */ - xscale->jtag_info.chain_pos = chain_pos; - jtag_register_event_callback(xscale_jtag_callback, target); - - xscale->jtag_info.dbgrx = 0x02; - xscale->jtag_info.dbgtx = 0x10; - xscale->jtag_info.dcsr = 0x09; - xscale->jtag_info.ldic = 0x07; - - if ((strcmp(xscale->variant, "pxa250") == 0) || - (strcmp(xscale->variant, "pxa255") == 0) || - (strcmp(xscale->variant, "pxa26x") == 0)) - { - xscale->jtag_info.ir_length = 5; - } - else if ((strcmp(xscale->variant, "pxa27x") == 0) || - (strcmp(xscale->variant, "ixp42x") == 0) || - (strcmp(xscale->variant, "ixp45x") == 0) || - (strcmp(xscale->variant, "ixp46x") == 0)) - { - xscale->jtag_info.ir_length = 7; - } - - /* the debug handler isn't installed (and thus not running) at this time */ - xscale->handler_installed = 0; - xscale->handler_running = 0; - xscale->handler_address = 0xfe000800; - - /* clear the vectors we keep locally for reference */ - memset(xscale->low_vectors, 0, sizeof(xscale->low_vectors)); - memset(xscale->high_vectors, 0, sizeof(xscale->high_vectors)); - - /* no user-specified vectors have been configured yet */ - xscale->static_low_vectors_set = 0x0; - xscale->static_high_vectors_set = 0x0; - - /* calculate branches to debug handler */ - low_reset_branch = (xscale->handler_address + 0x20 - 0x0 - 0x8) >> 2; - high_reset_branch = (xscale->handler_address + 0x20 - 0xffff0000 - 0x8) >> 2; - - xscale->low_vectors[0] = ARMV4_5_B((low_reset_branch & 0xffffff), 0); - xscale->high_vectors[0] = ARMV4_5_B((high_reset_branch & 0xffffff), 0); - - for (i = 1; i <= 7; i++) - { - xscale->low_vectors[i] = ARMV4_5_B(0xfffffe, 0); - xscale->high_vectors[i] = ARMV4_5_B(0xfffffe, 0); - } - - /* 64kB aligned region used for DCache cleaning */ - xscale->cache_clean_address = 0xfffe0000; - - xscale->hold_rst = 0; - xscale->external_debug_break = 0; - - xscale->force_hw_bkpts = 1; - - xscale->ibcr_available = 2; - xscale->ibcr0_used = 0; - xscale->ibcr1_used = 0; - - xscale->dbr_available = 2; - xscale->dbr0_used = 0; - xscale->dbr1_used = 0; - - xscale->arm_bkpt = ARMV5_BKPT(0x0); - xscale->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff; - - xscale->vector_catch = 0x1; - - xscale->trace.capture_status = TRACE_IDLE; - xscale->trace.data = NULL; - xscale->trace.image = NULL; - xscale->trace.buffer_enabled = 0; - xscale->trace.buffer_fill = 0; - - /* prepare ARMv4/5 specific information */ - armv4_5->arch_info = xscale; - armv4_5->read_core_reg = xscale_read_core_reg; - armv4_5->write_core_reg = xscale_write_core_reg; - armv4_5->full_context = xscale_full_context; - - armv4_5_init_arch_info(target, armv4_5); - - xscale->armv4_5_mmu.armv4_5_cache.ctype = -1; - xscale->armv4_5_mmu.get_ttb = xscale_get_ttb; - xscale->armv4_5_mmu.read_memory = xscale_read_memory; - xscale->armv4_5_mmu.write_memory = xscale_write_memory; - xscale->armv4_5_mmu.disable_mmu_caches = xscale_disable_mmu_caches; - xscale->armv4_5_mmu.enable_mmu_caches = xscale_enable_mmu_caches; - xscale->armv4_5_mmu.has_tiny_pages = 1; - xscale->armv4_5_mmu.mmu_enabled = 0; - - xscale->fast_memory_access = 0; - - return ERROR_OK; -} - -/* target xscale <endianess> <startup_mode> <chain_pos> <variant> */ -int xscale_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target) -{ - int chain_pos; - char *variant = NULL; - xscale_common_t *xscale = malloc(sizeof(xscale_common_t)); - - if (argc < 5) - { - ERROR("'target xscale' requires four arguments: <endianess> <startup_mode> <chain_pos> <variant>"); - return ERROR_OK; - } - - chain_pos = strtoul(args[3], NULL, 0); - - variant = args[4]; - - xscale_init_arch_info(target, xscale, chain_pos, variant); - xscale_build_reg_cache(target); - - return ERROR_OK; -} - -int xscale_handle_debug_handler_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = NULL; - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - - u32 handler_address; - - if (argc < 2) - { - ERROR("'xscale debug_handler <target#> <address>' command takes two required operands"); - return ERROR_OK; - } - - if ((target = get_target_by_num(strtoul(args[0], NULL, 0))) == NULL) - { - ERROR("no target '%s' configured", args[0]); - return ERROR_OK; - } - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - handler_address = strtoul(args[1], NULL, 0); - - if (((handler_address >= 0x800) && (handler_address <= 0x1fef800)) || - ((handler_address >= 0xfe000800) && (handler_address <= 0xfffff800))) - { - xscale->handler_address = handler_address; - } - else - { - ERROR("xscale debug_handler <address> must be between 0x800 and 0x1fef800 or between 0xfe000800 and 0xfffff800"); - } - - return ERROR_OK; -} - -int xscale_handle_cache_clean_address_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = NULL; - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - - u32 cache_clean_address; - - if (argc < 2) - { - ERROR("'xscale cache_clean_address <target#> <address>' command takes two required operands"); - return ERROR_OK; - } - - if ((target = get_target_by_num(strtoul(args[0], NULL, 0))) == NULL) - { - ERROR("no target '%s' configured", args[0]); - return ERROR_OK; - } - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - cache_clean_address = strtoul(args[1], NULL, 0); - - if (cache_clean_address & 0xffff) - { - ERROR("xscale cache_clean_address <address> must be 64kb aligned"); - } - else - { - xscale->cache_clean_address = cache_clean_address; - } - - return ERROR_OK; -} - -int xscale_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - return armv4_5_handle_cache_info_command(cmd_ctx, &xscale->armv4_5_mmu.armv4_5_cache); -} - -static int xscale_virt2phys(struct target_s *target, u32 virtual, u32 *physical) -{ - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - int retval; - int type; - u32 cb; - int domain; - u32 ap; - - if ((retval = xscale_get_arch_pointers(target, &armv4_5, &xscale)) != ERROR_OK) - { - return retval; - } - u32 ret = armv4_5_mmu_translate_va(target, &xscale->armv4_5_mmu, virtual, &type, &cb, &domain, &ap); - if (type == -1) - { - return ret; - } - - *physical = ret; - return ERROR_OK; -} - -static int xscale_mmu(struct target_s *target, int *enabled) -{ - armv4_5_common_t *armv4_5 = target->arch_info; - xscale_common_t *xscale = armv4_5->arch_info; - - if (target->state != TARGET_HALTED) - { - ERROR("Target not halted"); - return ERROR_TARGET_INVALID; - } - - *enabled = xscale->armv4_5_mmu.mmu_enabled; - return ERROR_OK; -} - -int xscale_handle_mmu_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - if (target->state != TARGET_HALTED) - { - command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd); - return ERROR_OK; - } - - if (argc >= 1) - { - if (strcmp("enable", args[0]) == 0) - { - xscale_enable_mmu_caches(target, 1, 0, 0); - xscale->armv4_5_mmu.mmu_enabled = 1; - } - else if (strcmp("disable", args[0]) == 0) - { - xscale_disable_mmu_caches(target, 1, 0, 0); - xscale->armv4_5_mmu.mmu_enabled = 0; - } - } - - command_print(cmd_ctx, "mmu %s", (xscale->armv4_5_mmu.mmu_enabled) ? "enabled" : "disabled"); - - return ERROR_OK; -} - -int xscale_handle_idcache_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - int icache = 0, dcache = 0; - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - if (target->state != TARGET_HALTED) - { - command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd); - return ERROR_OK; - } - - if (strcmp(cmd, "icache") == 0) - icache = 1; - else if (strcmp(cmd, "dcache") == 0) - dcache = 1; - - if (argc >= 1) - { - if (strcmp("enable", args[0]) == 0) - { - xscale_enable_mmu_caches(target, 0, dcache, icache); - - if (icache) - xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 1; - else if (dcache) - xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 1; - } - else if (strcmp("disable", args[0]) == 0) - { - xscale_disable_mmu_caches(target, 0, dcache, icache); - - if (icache) - xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0; - else if (dcache) - xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0; - } - } - - if (icache) - command_print(cmd_ctx, "icache %s", (xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled) ? "enabled" : "disabled"); - - if (dcache) - command_print(cmd_ctx, "dcache %s", (xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled) ? "enabled" : "disabled"); - - return ERROR_OK; -} - -int xscale_handle_vector_catch_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - if (argc < 1) - { - command_print(cmd_ctx, "usage: xscale vector_catch [mask]"); - } - else - { - xscale->vector_catch = strtoul(args[0], NULL, 0); - buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 8, xscale->vector_catch); - xscale_write_dcsr(target, -1, -1); - } - - command_print(cmd_ctx, "vector catch mask: 0x%2.2x", xscale->vector_catch); - - return ERROR_OK; -} - -int xscale_handle_force_hw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - if ((argc >= 1) && (strcmp("enable", args[0]) == 0)) - { - xscale->force_hw_bkpts = 1; - } - else if ((argc >= 1) && (strcmp("disable", args[0]) == 0)) - { - xscale->force_hw_bkpts = 0; - } - else - { - command_print(cmd_ctx, "usage: xscale force_hw_bkpts <enable|disable>"); - } - - command_print(cmd_ctx, "force hardware breakpoints %s", (xscale->force_hw_bkpts) ? "enabled" : "disabled"); - - return ERROR_OK; -} - -int xscale_handle_trace_buffer_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - u32 dcsr_value; - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - if (target->state != TARGET_HALTED) - { - command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd); - return ERROR_OK; - } - - if ((argc >= 1) && (strcmp("enable", args[0]) == 0)) - { - xscale_trace_data_t *td, *next_td; - xscale->trace.buffer_enabled = 1; - - /* free old trace data */ - td = xscale->trace.data; - while (td) - { - next_td = td->next; - - if (td->entries) - free(td->entries); - free(td); - td = next_td; - } - xscale->trace.data = NULL; - } - else if ((argc >= 1) && (strcmp("disable", args[0]) == 0)) - { - xscale->trace.buffer_enabled = 0; - } - - if ((argc >= 2) && (strcmp("fill", args[1]) == 0)) - { - if (argc >= 3) - xscale->trace.buffer_fill = strtoul(args[2], NULL, 0); - else - xscale->trace.buffer_fill = 1; - } - else if ((argc >= 2) && (strcmp("wrap", args[1]) == 0)) - { - xscale->trace.buffer_fill = -1; - } - - if (xscale->trace.buffer_enabled) - { - /* if we enable the trace buffer in fill-once - * mode we know the address of the first instruction */ - xscale->trace.pc_ok = 1; - xscale->trace.current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); - } - else - { - /* otherwise the address is unknown, and we have no known good PC */ - xscale->trace.pc_ok = 0; - } - - command_print(cmd_ctx, "trace buffer %s (%s)", - (xscale->trace.buffer_enabled) ? "enabled" : "disabled", - (xscale->trace.buffer_fill > 0) ? "fill" : "wrap"); - - dcsr_value = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 0, 32); - if (xscale->trace.buffer_fill >= 0) - xscale_write_dcsr_sw(target, (dcsr_value & 0xfffffffc) | 2); - else - xscale_write_dcsr_sw(target, dcsr_value & 0xfffffffc); - - return ERROR_OK; -} - -int xscale_handle_trace_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target; - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - - if (argc < 1) - { - command_print(cmd_ctx, "usage: xscale trace_image <file> [base address] [type]"); - return ERROR_OK; - } - - target = get_current_target(cmd_ctx); - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - if (xscale->trace.image) - { - image_close(xscale->trace.image); - free(xscale->trace.image); - command_print(cmd_ctx, "previously loaded image found and closed"); - } - - xscale->trace.image = malloc(sizeof(image_t)); - xscale->trace.image->base_address_set = 0; - xscale->trace.image->start_address_set = 0; - - /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */ - if (argc >= 2) - { - xscale->trace.image->base_address_set = 1; - xscale->trace.image->base_address = strtoul(args[1], NULL, 0); - } - else - { - xscale->trace.image->base_address_set = 0; - } - - if (image_open(xscale->trace.image, args[0], (argc >= 3) ? args[2] : NULL) != ERROR_OK) - { - command_print(cmd_ctx, "image opening error: %s", xscale->trace.image->error_str); - free(xscale->trace.image); - xscale->trace.image = NULL; - return ERROR_OK; - } - - return ERROR_OK; -} - -int xscale_handle_dump_trace_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - xscale_trace_data_t *trace_data; - fileio_t file; - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - if (target->state != TARGET_HALTED) - { - command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd); - return ERROR_OK; - } - - if (argc < 1) - { - command_print(cmd_ctx, "usage: xscale dump_trace <file>"); - return ERROR_OK; - } - - trace_data = xscale->trace.data; - - if (!trace_data) - { - command_print(cmd_ctx, "no trace data collected"); - return ERROR_OK; - } - - if (fileio_open(&file, args[0], FILEIO_WRITE, FILEIO_BINARY) != ERROR_OK) - { - command_print(cmd_ctx, "file open error: %s", file.error_str); - return ERROR_OK; - } - - while (trace_data) - { - int i; - - fileio_write_u32(&file, trace_data->chkpt0); - fileio_write_u32(&file, trace_data->chkpt1); - fileio_write_u32(&file, trace_data->last_instruction); - fileio_write_u32(&file, trace_data->depth); - - for (i = 0; i < trace_data->depth; i++) - fileio_write_u32(&file, trace_data->entries[i].data | ((trace_data->entries[i].type & 0xffff) << 16)); - - trace_data = trace_data->next; - } - - fileio_close(&file); - - return ERROR_OK; -} - -int xscale_handle_analyze_trace_buffer_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - xscale_analyze_trace(target, cmd_ctx); - - return ERROR_OK; -} - -int xscale_handle_cp15(command_context_t *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - if (target->state != TARGET_HALTED) - { - command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd); - return ERROR_OK; - } - u32 reg_no = 0; - reg_t *reg = NULL; - if(argc > 0) - { - reg_no = strtoul(args[0], NULL, 0); - /*translate from xscale cp15 register no to openocd register*/ - switch(reg_no) - { - case 0: - reg_no = XSCALE_MAINID; - break; - case 1: - reg_no = XSCALE_CTRL; - break; - case 2: - reg_no = XSCALE_TTB; - break; - case 3: - reg_no = XSCALE_DAC; - break; - case 5: - reg_no = XSCALE_FSR; - break; - case 6: - reg_no = XSCALE_FAR; - break; - case 13: - reg_no = XSCALE_PID; - break; - case 15: - reg_no = XSCALE_CPACCESS; - break; - default: - command_print(cmd_ctx, "invalid register number"); - return ERROR_INVALID_ARGUMENTS; - } - reg = &xscale->reg_cache->reg_list[reg_no]; - - } - if(argc == 1) - { - u32 value; - - /* read cp15 control register */ - xscale_get_reg(reg); - value = buf_get_u32(reg->value, 0, 32); - command_print(cmd_ctx, "%s (/%i): 0x%x", reg->name, reg->size, value); - } - else if(argc == 2) - { - - u32 value = strtoul(args[1], NULL, 0); - - /* send CP write request (command 0x41) */ - xscale_send_u32(target, 0x41); - - /* send CP register number */ - xscale_send_u32(target, reg_no); - - /* send CP register value */ - xscale_send_u32(target, value); - - /* execute cpwait to ensure outstanding operations complete */ - xscale_send_u32(target, 0x53); - } - else - { - command_print(cmd_ctx, "usage: cp15 [register]<, [value]>"); - } - - return ERROR_OK; -} - -int handle_xscale_fast_memory_access_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) -{ - target_t *target = get_current_target(cmd_ctx); - armv4_5_common_t *armv4_5; - xscale_common_t *xscale; - - if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK) - { - return ERROR_OK; - } - - if (argc == 1) - { - if (strcmp("enable", args[0]) == 0) - { - xscale->fast_memory_access = 1; - } - else if (strcmp("disable", args[0]) == 0) - { - xscale->fast_memory_access = 0; - } - else - { - return ERROR_COMMAND_SYNTAX_ERROR; - } - } else if (argc!=0) - { - return ERROR_COMMAND_SYNTAX_ERROR; - } - - command_print(cmd_ctx, "fast memory access is %s", (xscale->fast_memory_access) ? "enabled" : "disabled"); - - return ERROR_OK; -} - -int xscale_register_commands(struct command_context_s *cmd_ctx) -{ - command_t *xscale_cmd; - - xscale_cmd = register_command(cmd_ctx, NULL, "xscale", NULL, COMMAND_ANY, "xscale specific commands"); - - register_command(cmd_ctx, xscale_cmd, "debug_handler", xscale_handle_debug_handler_command, COMMAND_ANY, "'xscale debug_handler <target#> <address>' command takes two required operands"); - register_command(cmd_ctx, xscale_cmd, "cache_clean_address", xscale_handle_cache_clean_address_command, COMMAND_ANY, NULL); - - register_command(cmd_ctx, xscale_cmd, "cache_info", xscale_handle_cache_info_command, COMMAND_EXEC, NULL); - register_command(cmd_ctx, xscale_cmd, "mmu", xscale_handle_mmu_command, COMMAND_EXEC, "['enable'|'disable'] the MMU"); - register_command(cmd_ctx, xscale_cmd, "icache", xscale_handle_idcache_command, COMMAND_EXEC, "['enable'|'disable'] the ICache"); - register_command(cmd_ctx, xscale_cmd, "dcache", xscale_handle_idcache_command, COMMAND_EXEC, "['enable'|'disable'] the DCache"); - - register_command(cmd_ctx, xscale_cmd, "vector_catch", xscale_handle_idcache_command, COMMAND_EXEC, "<mask> of vectors that should be catched"); - - register_command(cmd_ctx, xscale_cmd, "trace_buffer", xscale_handle_trace_buffer_command, COMMAND_EXEC, "<enable|disable> ['fill' [n]|'wrap']"); - - register_command(cmd_ctx, xscale_cmd, "dump_trace", xscale_handle_dump_trace_command, COMMAND_EXEC, "dump content of trace buffer to <file>"); - register_command(cmd_ctx, xscale_cmd, "analyze_trace", xscale_handle_analyze_trace_buffer_command, COMMAND_EXEC, "analyze content of trace buffer"); - register_command(cmd_ctx, xscale_cmd, "trace_image", xscale_handle_trace_image_command, - COMMAND_EXEC, "load image from <file> [base address]"); - - register_command(cmd_ctx, xscale_cmd, "cp15", xscale_handle_cp15, COMMAND_EXEC, "access coproc 15 <register> [value]"); - register_command(cmd_ctx, xscale_cmd, "fast_memory_access", handle_xscale_fast_memory_access_command, - COMMAND_ANY, "use fast memory accesses instead of slower but potentially unsafe slow accesses <enable|disable>"); - - armv4_5_register_commands(cmd_ctx); - - return ERROR_OK; -} +/***************************************************************************
+ * Copyright (C) 2006, 2007 by Dominic Rath *
+ * Dominic.Rath@gmx.de *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ ***************************************************************************/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "replacements.h"
+
+#include "xscale.h"
+
+#include "register.h"
+#include "target.h"
+#include "armv4_5.h"
+#include "arm_simulator.h"
+#include "arm_disassembler.h"
+#include "log.h"
+#include "jtag.h"
+#include "binarybuffer.h"
+#include "time_support.h"
+#include "breakpoints.h"
+#include "fileio.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+
+
+/* cli handling */
+int xscale_register_commands(struct command_context_s *cmd_ctx);
+
+/* forward declarations */
+int xscale_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
+int xscale_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
+int xscale_quit();
+
+int xscale_arch_state(struct target_s *target);
+int xscale_poll(target_t *target);
+int xscale_halt(target_t *target);
+int xscale_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution);
+int xscale_step(struct target_s *target, int current, u32 address, int handle_breakpoints);
+int xscale_debug_entry(target_t *target);
+int xscale_restore_context(target_t *target);
+
+int xscale_assert_reset(target_t *target);
+int xscale_deassert_reset(target_t *target);
+int xscale_soft_reset_halt(struct target_s *target);
+int xscale_prepare_reset_halt(struct target_s *target);
+
+int xscale_set_reg_u32(reg_t *reg, u32 value);
+
+int xscale_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode);
+int xscale_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, u32 value);
+
+int xscale_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
+int xscale_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
+int xscale_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer);
+int xscale_checksum_memory(struct target_s *target, u32 address, u32 count, u32* checksum);
+
+int xscale_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
+int xscale_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
+int xscale_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
+int xscale_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
+int xscale_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint);
+int xscale_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint);
+void xscale_enable_watchpoints(struct target_s *target);
+void xscale_enable_breakpoints(struct target_s *target);
+static int xscale_virt2phys(struct target_s *target, u32 virtual, u32 *physical);
+static int xscale_mmu(struct target_s *target, int *enabled);
+
+int xscale_read_trace(target_t *target);
+
+target_type_t xscale_target =
+{
+ .name = "xscale",
+
+ .poll = xscale_poll,
+ .arch_state = xscale_arch_state,
+
+ .target_request_data = NULL,
+
+ .halt = xscale_halt,
+ .resume = xscale_resume,
+ .step = xscale_step,
+
+ .assert_reset = xscale_assert_reset,
+ .deassert_reset = xscale_deassert_reset,
+ .soft_reset_halt = xscale_soft_reset_halt,
+ .prepare_reset_halt = xscale_prepare_reset_halt,
+
+ .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
+
+ .read_memory = xscale_read_memory,
+ .write_memory = xscale_write_memory,
+ .bulk_write_memory = xscale_bulk_write_memory,
+ .checksum_memory = xscale_checksum_memory,
+
+ .run_algorithm = armv4_5_run_algorithm,
+
+ .add_breakpoint = xscale_add_breakpoint,
+ .remove_breakpoint = xscale_remove_breakpoint,
+ .add_watchpoint = xscale_add_watchpoint,
+ .remove_watchpoint = xscale_remove_watchpoint,
+
+ .register_commands = xscale_register_commands,
+ .target_command = xscale_target_command,
+ .init_target = xscale_init_target,
+ .quit = xscale_quit,
+
+ .virt2phys = xscale_virt2phys,
+ .mmu = xscale_mmu
+};
+
+char* xscale_reg_list[] =
+{
+ "XSCALE_MAINID", /* 0 */
+ "XSCALE_CACHETYPE",
+ "XSCALE_CTRL",
+ "XSCALE_AUXCTRL",
+ "XSCALE_TTB",
+ "XSCALE_DAC",
+ "XSCALE_FSR",
+ "XSCALE_FAR",
+ "XSCALE_PID",
+ "XSCALE_CPACCESS",
+ "XSCALE_IBCR0", /* 10 */
+ "XSCALE_IBCR1",
+ "XSCALE_DBR0",
+ "XSCALE_DBR1",
+ "XSCALE_DBCON",
+ "XSCALE_TBREG",
+ "XSCALE_CHKPT0",
+ "XSCALE_CHKPT1",
+ "XSCALE_DCSR",
+ "XSCALE_TX",
+ "XSCALE_RX", /* 20 */
+ "XSCALE_TXRXCTRL",
+};
+
+xscale_reg_t xscale_reg_arch_info[] =
+{
+ {XSCALE_MAINID, NULL},
+ {XSCALE_CACHETYPE, NULL},
+ {XSCALE_CTRL, NULL},
+ {XSCALE_AUXCTRL, NULL},
+ {XSCALE_TTB, NULL},
+ {XSCALE_DAC, NULL},
+ {XSCALE_FSR, NULL},
+ {XSCALE_FAR, NULL},
+ {XSCALE_PID, NULL},
+ {XSCALE_CPACCESS, NULL},
+ {XSCALE_IBCR0, NULL},
+ {XSCALE_IBCR1, NULL},
+ {XSCALE_DBR0, NULL},
+ {XSCALE_DBR1, NULL},
+ {XSCALE_DBCON, NULL},
+ {XSCALE_TBREG, NULL},
+ {XSCALE_CHKPT0, NULL},
+ {XSCALE_CHKPT1, NULL},
+ {XSCALE_DCSR, NULL}, /* DCSR accessed via JTAG or SW */
+ {-1, NULL}, /* TX accessed via JTAG */
+ {-1, NULL}, /* RX accessed via JTAG */
+ {-1, NULL}, /* TXRXCTRL implicit access via JTAG */
+};
+
+int xscale_reg_arch_type = -1;
+
+int xscale_get_reg(reg_t *reg);
+int xscale_set_reg(reg_t *reg, u8 *buf);
+
+int xscale_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, xscale_common_t **xscale_p)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
+ {
+ ERROR("target isn't an XScale target");
+ return -1;
+ }
+
+ if (xscale->common_magic != XSCALE_COMMON_MAGIC)
+ {
+ ERROR("target isn't an XScale target");
+ return -1;
+ }
+
+ *armv4_5_p = armv4_5;
+ *xscale_p = xscale;
+
+ return ERROR_OK;
+}
+
+int xscale_jtag_set_instr(int chain_pos, u32 new_instr)
+{
+ jtag_device_t *device = jtag_get_device(chain_pos);
+
+ if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr)
+ {
+ scan_field_t field;
+
+ field.device = chain_pos;
+ field.num_bits = device->ir_length;
+ field.out_value = calloc(CEIL(field.num_bits, 8), 1);
+ buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
+ field.out_mask = NULL;
+ field.in_value = NULL;
+ jtag_set_check_value(&field, device->expected, device->expected_mask, NULL);
+
+ jtag_add_ir_scan(1, &field, -1);
+
+ free(field.out_value);
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_jtag_callback(enum jtag_event event, void *priv)
+{
+ switch (event)
+ {
+ case JTAG_TRST_ASSERTED:
+ break;
+ case JTAG_TRST_RELEASED:
+ break;
+ case JTAG_SRST_ASSERTED:
+ break;
+ case JTAG_SRST_RELEASED:
+ break;
+ default:
+ WARNING("unhandled JTAG event");
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_read_dcsr(target_t *target)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ int retval;
+
+ scan_field_t fields[3];
+ u8 field0 = 0x0;
+ u8 field0_check_value = 0x2;
+ u8 field0_check_mask = 0x7;
+ u8 field2 = 0x0;
+ u8 field2_check_value = 0x0;
+ u8 field2_check_mask = 0x1;
+
+ jtag_add_end_state(TAP_PD);
+ xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr);
+
+ buf_set_u32(&field0, 1, 1, xscale->hold_rst);
+ buf_set_u32(&field0, 2, 1, xscale->external_debug_break);
+
+ fields[0].device = xscale->jtag_info.chain_pos;
+ fields[0].num_bits = 3;
+ fields[0].out_value = &field0;
+ fields[0].out_mask = NULL;
+ fields[0].in_value = NULL;
+ jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
+
+ fields[1].device = xscale->jtag_info.chain_pos;
+ fields[1].num_bits = 32;
+ fields[1].out_value = NULL;
+ fields[1].out_mask = NULL;
+ fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
+ fields[1].in_handler = NULL;
+ fields[1].in_handler_priv = NULL;
+ fields[1].in_check_value = NULL;
+ fields[1].in_check_mask = NULL;
+
+
+
+ fields[2].device = xscale->jtag_info.chain_pos;
+ fields[2].num_bits = 1;
+ fields[2].out_value = &field2;
+ fields[2].out_mask = NULL;
+ fields[2].in_value = NULL;
+ jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
+
+ jtag_add_dr_scan(3, fields, -1);
+
+ if ((retval = jtag_execute_queue()) != ERROR_OK)
+ {
+ ERROR("JTAG error while reading DCSR");
+ return retval;
+ }
+
+ xscale->reg_cache->reg_list[XSCALE_DCSR].dirty = 0;
+ xscale->reg_cache->reg_list[XSCALE_DCSR].valid = 1;
+
+ /* write the register with the value we just read
+ * on this second pass, only the first bit of field0 is guaranteed to be 0)
+ */
+ field0_check_mask = 0x1;
+ fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
+ fields[1].in_value = NULL;
+
+ jtag_add_end_state(TAP_RTI);
+
+ jtag_add_dr_scan(3, fields, -1);
+
+ return ERROR_OK;
+}
+
+int xscale_receive(target_t *target, u32 *buffer, int num_words)
+{
+ int retval = ERROR_OK;
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ enum tap_state path[3];
+ scan_field_t fields[3];
+
+ u8 *field0 = malloc(num_words * 1);
+ u8 field0_check_value = 0x2;
+ u8 field0_check_mask = 0x6;
+ u32 *field1 = malloc(num_words * 4);
+ u8 field2_check_value = 0x0;
+ u8 field2_check_mask = 0x1;
+ int words_done = 0;
+ int words_scheduled = 0;
+
+ int i;
+
+ path[0] = TAP_SDS;
+ path[1] = TAP_CD;
+ path[2] = TAP_SD;
+
+ fields[0].device = xscale->jtag_info.chain_pos;
+ fields[0].num_bits = 3;
+ fields[0].out_value = NULL;
+ fields[0].out_mask = NULL;
+ /* fields[0].in_value = field0; */
+ jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
+
+ fields[1].device = xscale->jtag_info.chain_pos;
+ fields[1].num_bits = 32;
+ fields[1].out_value = NULL;
+ fields[1].out_mask = NULL;
+ fields[1].in_value = NULL;
+ fields[1].in_handler = NULL;
+ fields[1].in_handler_priv = NULL;
+ fields[1].in_check_value = NULL;
+ fields[1].in_check_mask = NULL;
+
+
+
+ fields[2].device = xscale->jtag_info.chain_pos;
+ fields[2].num_bits = 1;
+ fields[2].out_value = NULL;
+ fields[2].out_mask = NULL;
+ fields[2].in_value = NULL;
+ jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
+
+ jtag_add_end_state(TAP_RTI);
+ xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgtx);
+ jtag_add_runtest(1, -1);
+
+ /* repeat until all words have been collected */
+ int attempts = 0;
+ while (words_done < num_words)
+ {
+ /* schedule reads */
+ words_scheduled = 0;
+ for (i = words_done; i < num_words; i++)
+ {
+ fields[0].in_value = &field0[i];
+ fields[1].in_handler = buf_to_u32_handler;
+ fields[1].in_handler_priv = (u8*)&field1[i];
+
+ jtag_add_pathmove(3, path);
+ jtag_add_dr_scan(3, fields, TAP_RTI);
+ words_scheduled++;
+ }
+
+ if ((retval = jtag_execute_queue()) != ERROR_OK)
+ {
+ ERROR("JTAG error while receiving data from debug handler");
+ break;
+ }
+
+ /* examine results */
+ for (i = words_done; i < num_words; i++)
+ {
+ if (!(field0[0] & 1))
+ {
+ /* move backwards if necessary */
+ int j;
+ for (j = i; j < num_words - 1; j++)
+ {
+ field0[j] = field0[j+1];
+ field1[j] = field1[j+1];
+ }
+ words_scheduled--;
+ }
+ }
+ if (words_scheduled == 0)
+ {
+ if (attempts++ == 1000)
+ {
+ ERROR("Failed to receiving data from debug handler after 1000 attempts");
+ retval = ERROR_JTAG_QUEUE_FAILED;
+ break;
+ }
+ }
+
+ words_done += words_scheduled;
+ }
+
+ for (i = 0; i < num_words; i++)
+ *(buffer++) = buf_get_u32((u8*)&field1[i], 0, 32);
+
+ free(field1);
+
+ return retval;
+}
+
+int xscale_read_tx(target_t *target, int consume)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ enum tap_state path[3];
+ enum tap_state noconsume_path[9];
+
+ int retval;
+ struct timeval timeout, now;
+
+ scan_field_t fields[3];
+ u8 field0_in = 0x0;
+ u8 field0_check_value = 0x2;
+ u8 field0_check_mask = 0x6;
+ u8 field2_check_value = 0x0;
+ u8 field2_check_mask = 0x1;
+
+ jtag_add_end_state(TAP_RTI);
+
+ xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgtx);
+
+ path[0] = TAP_SDS;
+ path[1] = TAP_CD;
+ path[2] = TAP_SD;
+
+ noconsume_path[0] = TAP_SDS;
+ noconsume_path[1] = TAP_CD;
+ noconsume_path[2] = TAP_E1D;
+ noconsume_path[3] = TAP_PD;
+ noconsume_path[4] = TAP_E2D;
+ noconsume_path[5] = TAP_UD;
+ noconsume_path[6] = TAP_SDS;
+ noconsume_path[7] = TAP_CD;
+ noconsume_path[8] = TAP_SD;
+
+ fields[0].device = xscale->jtag_info.chain_pos;
+ fields[0].num_bits = 3;
+ fields[0].out_value = NULL;
+ fields[0].out_mask = NULL;
+ fields[0].in_value = &field0_in;
+ jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
+
+ fields[1].device = xscale->jtag_info.chain_pos;
+ fields[1].num_bits = 32;
+ fields[1].out_value = NULL;
+ fields[1].out_mask = NULL;
+ fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_TX].value;
+ fields[1].in_handler = NULL;
+ fields[1].in_handler_priv = NULL;
+ fields[1].in_check_value = NULL;
+ fields[1].in_check_mask = NULL;
+
+
+
+ fields[2].device = xscale->jtag_info.chain_pos;
+ fields[2].num_bits = 1;
+ fields[2].out_value = NULL;
+ fields[2].out_mask = NULL;
+ fields[2].in_value = NULL;
+ jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
+
+ gettimeofday(&timeout, NULL);
+ timeval_add_time(&timeout, 5, 0);
+
+ do
+ {
+ /* if we want to consume the register content (i.e. clear TX_READY),
+ * we have to go straight from Capture-DR to Shift-DR
+ * otherwise, we go from Capture-DR to Exit1-DR to Pause-DR
+ */
+ if (consume)
+ jtag_add_pathmove(3, path);
+ else
+ jtag_add_pathmove(sizeof(noconsume_path)/sizeof(*noconsume_path), noconsume_path);
+
+ jtag_add_dr_scan(3, fields, TAP_RTI);
+
+ if ((retval = jtag_execute_queue()) != ERROR_OK)
+ {
+ ERROR("JTAG error while reading TX");
+ return ERROR_TARGET_TIMEOUT;
+ }
+
+ gettimeofday(&now, NULL);
+ if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec)&& (now.tv_usec > timeout.tv_usec)))
+ {
+ ERROR("time out reading TX register");
+ return ERROR_TARGET_TIMEOUT;
+ }
+ } while ((!(field0_in & 1)) && consume);
+
+ if (!(field0_in & 1))
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+
+ return ERROR_OK;
+}
+
+int xscale_write_rx(target_t *target)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ int retval;
+ struct timeval timeout, now;
+
+ scan_field_t fields[3];
+ u8 field0_out = 0x0;
+ u8 field0_in = 0x0;
+ u8 field0_check_value = 0x2;
+ u8 field0_check_mask = 0x6;
+ u8 field2 = 0x0;
+ u8 field2_check_value = 0x0;
+ u8 field2_check_mask = 0x1;
+
+ jtag_add_end_state(TAP_RTI);
+
+ xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgrx);
+
+ fields[0].device = xscale->jtag_info.chain_pos;
+ fields[0].num_bits = 3;
+ fields[0].out_value = &field0_out;
+ fields[0].out_mask = NULL;
+ fields[0].in_value = &field0_in;
+ jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
+
+ fields[1].device = xscale->jtag_info.chain_pos;
+ fields[1].num_bits = 32;
+ fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_RX].value;
+ fields[1].out_mask = NULL;
+ fields[1].in_value = NULL;
+ fields[1].in_handler = NULL;
+ fields[1].in_handler_priv = NULL;
+ fields[1].in_check_value = NULL;
+ fields[1].in_check_mask = NULL;
+
+
+
+ fields[2].device = xscale->jtag_info.chain_pos;
+ fields[2].num_bits = 1;
+ fields[2].out_value = &field2;
+ fields[2].out_mask = NULL;
+ fields[2].in_value = NULL;
+ jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
+
+ gettimeofday(&timeout, NULL);
+ timeval_add_time(&timeout, 5, 0);
+
+ /* poll until rx_read is low */
+ DEBUG("polling RX");
+ do
+ {
+ jtag_add_dr_scan(3, fields, TAP_RTI);
+
+ if ((retval = jtag_execute_queue()) != ERROR_OK)
+ {
+ ERROR("JTAG error while writing RX");
+ return retval;
+ }
+
+ gettimeofday(&now, NULL);
+ if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec)&& (now.tv_usec > timeout.tv_usec)))
+ {
+ ERROR("time out writing RX register");
+ return ERROR_TARGET_TIMEOUT;
+ }
+ } while (field0_in & 1);
+
+ /* set rx_valid */
+ field2 = 0x1;
+ jtag_add_dr_scan(3, fields, TAP_RTI);
+
+ if ((retval = jtag_execute_queue()) != ERROR_OK)
+ {
+ ERROR("JTAG error while writing RX");
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+/* send count elements of size byte to the debug handler */
+int xscale_send(target_t *target, u8 *buffer, int count, int size)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ int retval;
+
+ int done_count = 0;
+ u8 output[4] = {0, 0, 0, 0};
+
+ scan_field_t fields[3];
+ u8 field0_out = 0x0;
+ u8 field0_check_value = 0x2;
+ u8 field0_check_mask = 0x6;
+ u8 field2 = 0x1;
+ u8 field2_check_value = 0x0;
+ u8 field2_check_mask = 0x1;
+
+ jtag_add_end_state(TAP_RTI);
+
+ xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgrx);
+
+ fields[0].device = xscale->jtag_info.chain_pos;
+ fields[0].num_bits = 3;
+ fields[0].out_value = &field0_out;
+ fields[0].out_mask = NULL;
+ fields[0].in_handler = NULL;
+ if (!xscale->fast_memory_access)
+ {
+ jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
+ }
+
+ fields[1].device = xscale->jtag_info.chain_pos;
+ fields[1].num_bits = 32;
+ fields[1].out_value = output;
+ fields[1].out_mask = NULL;
+ fields[1].in_value = NULL;
+ fields[1].in_handler = NULL;
+ fields[1].in_handler_priv = NULL;
+ fields[1].in_check_value = NULL;
+ fields[1].in_check_mask = NULL;
+
+
+
+ fields[2].device = xscale->jtag_info.chain_pos;
+ fields[2].num_bits = 1;
+ fields[2].out_value = &field2;
+ fields[2].out_mask = NULL;
+ fields[2].in_value = NULL;
+ fields[2].in_handler = NULL;
+ if (!xscale->fast_memory_access)
+ {
+ jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
+ }
+
+ if (size==4)
+ {
+ int endianness = target->endianness;
+ while (done_count++ < count)
+ {
+ if (endianness == TARGET_LITTLE_ENDIAN)
+ {
+ output[0]=buffer[0];
+ output[1]=buffer[1];
+ output[2]=buffer[2];
+ output[3]=buffer[3];
+ } else
+ {
+ output[0]=buffer[3];
+ output[1]=buffer[2];
+ output[2]=buffer[1];
+ output[3]=buffer[0];
+ }
+ jtag_add_dr_scan(3, fields, TAP_RTI);
+ buffer += size;
+ }
+
+ } else
+ {
+ while (done_count++ < count)
+ {
+ /* extract sized element from target-endian buffer, and put it
+ * into little-endian output buffer
+ */
+ switch (size)
+ {
+ case 2:
+ buf_set_u32(output, 0, 32, target_buffer_get_u16(target, buffer));
+ break;
+ case 1:
+ output[0] = *buffer;
+ break;
+ default:
+ ERROR("BUG: size neither 4, 2 nor 1");
+ exit(-1);
+ }
+
+ jtag_add_dr_scan(3, fields, TAP_RTI);
+ buffer += size;
+ }
+
+ }
+
+ if ((retval = jtag_execute_queue()) != ERROR_OK)
+ {
+ ERROR("JTAG error while sending data to debug handler");
+ return retval;
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_send_u32(target_t *target, u32 value)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ buf_set_u32(xscale->reg_cache->reg_list[XSCALE_RX].value, 0, 32, value);
+ return xscale_write_rx(target);
+}
+
+int xscale_write_dcsr(target_t *target, int hold_rst, int ext_dbg_brk)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ int retval;
+
+ scan_field_t fields[3];
+ u8 field0 = 0x0;
+ u8 field0_check_value = 0x2;
+ u8 field0_check_mask = 0x7;
+ u8 field2 = 0x0;
+ u8 field2_check_value = 0x0;
+ u8 field2_check_mask = 0x1;
+
+ if (hold_rst != -1)
+ xscale->hold_rst = hold_rst;
+
+ if (ext_dbg_brk != -1)
+ xscale->external_debug_break = ext_dbg_brk;
+
+ jtag_add_end_state(TAP_RTI);
+ xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr);
+
+ buf_set_u32(&field0, 1, 1, xscale->hold_rst);
+ buf_set_u32(&field0, 2, 1, xscale->external_debug_break);
+
+ fields[0].device = xscale->jtag_info.chain_pos;
+ fields[0].num_bits = 3;
+ fields[0].out_value = &field0;
+ fields[0].out_mask = NULL;
+ fields[0].in_value = NULL;
+ jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
+
+ fields[1].device = xscale->jtag_info.chain_pos;
+ fields[1].num_bits = 32;
+ fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
+ fields[1].out_mask = NULL;
+ fields[1].in_value = NULL;
+ fields[1].in_handler = NULL;
+ fields[1].in_handler_priv = NULL;
+ fields[1].in_check_value = NULL;
+ fields[1].in_check_mask = NULL;
+
+
+
+ fields[2].device = xscale->jtag_info.chain_pos;
+ fields[2].num_bits = 1;
+ fields[2].out_value = &field2;
+ fields[2].out_mask = NULL;
+ fields[2].in_value = NULL;
+ jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
+
+ jtag_add_dr_scan(3, fields, -1);
+
+ if ((retval = jtag_execute_queue()) != ERROR_OK)
+ {
+ ERROR("JTAG error while writing DCSR");
+ return retval;
+ }
+
+ xscale->reg_cache->reg_list[XSCALE_DCSR].dirty = 0;
+ xscale->reg_cache->reg_list[XSCALE_DCSR].valid = 1;
+
+ return ERROR_OK;
+}
+
+/* parity of the number of bits 0 if even; 1 if odd. for 32 bit words */
+unsigned int parity (unsigned int v)
+{
+ unsigned int ov = v;
+ v ^= v >> 16;
+ v ^= v >> 8;
+ v ^= v >> 4;
+ v &= 0xf;
+ DEBUG("parity of 0x%x is %i", ov, (0x6996 >> v) & 1);
+ return (0x6996 >> v) & 1;
+}
+
+int xscale_load_ic(target_t *target, int mini, u32 va, u32 buffer[8])
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ u8 packet[4];
+ u8 cmd;
+ int word;
+
+ scan_field_t fields[2];
+
+ DEBUG("loading miniIC at 0x%8.8x", va);
+
+ jtag_add_end_state(TAP_RTI);
+ xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.ldic); /* LDIC */
+
+ /* CMD is b010 for Main IC and b011 for Mini IC */
+ if (mini)
+ buf_set_u32(&cmd, 0, 3, 0x3);
+ else
+ buf_set_u32(&cmd, 0, 3, 0x2);
+
+ buf_set_u32(&cmd, 3, 3, 0x0);
+
+ /* virtual address of desired cache line */
+ buf_set_u32(packet, 0, 27, va >> 5);
+
+ fields[0].device = xscale->jtag_info.chain_pos;
+ fields[0].num_bits = 6;
+ fields[0].out_value = &cmd;
+ fields[0].out_mask = NULL;
+ fields[0].in_value = NULL;
+ fields[0].in_check_value = NULL;
+ fields[0].in_check_mask = NULL;
+ fields[0].in_handler = NULL;
+ fields[0].in_handler_priv = NULL;
+
+ fields[1].device = xscale->jtag_info.chain_pos;
+ fields[1].num_bits = 27;
+ fields[1].out_value = packet;
+ fields[1].out_mask = NULL;
+ fields[1].in_value = NULL;
+ fields[1].in_check_value = NULL;
+ fields[1].in_check_mask = NULL;
+ fields[1].in_handler = NULL;
+ fields[1].in_handler_priv = NULL;
+
+ jtag_add_dr_scan(2, fields, -1);
+
+ fields[0].num_bits = 32;
+ fields[0].out_value = packet;
+
+ fields[1].num_bits = 1;
+ fields[1].out_value = &cmd;
+
+ for (word = 0; word < 8; word++)
+ {
+ buf_set_u32(packet, 0, 32, buffer[word]);
+ cmd = parity(*((u32*)packet));
+ jtag_add_dr_scan(2, fields, -1);
+ }
+
+ jtag_execute_queue();
+
+ return ERROR_OK;
+}
+
+int xscale_invalidate_ic_line(target_t *target, u32 va)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ u8 packet[4];
+ u8 cmd;
+
+ scan_field_t fields[2];
+
+ jtag_add_end_state(TAP_RTI);
+ xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.ldic); /* LDIC */
+
+ /* CMD for invalidate IC line b000, bits [6:4] b000 */
+ buf_set_u32(&cmd, 0, 6, 0x0);
+
+ /* virtual address of desired cache line */
+ buf_set_u32(packet, 0, 27, va >> 5);
+
+ fields[0].device = xscale->jtag_info.chain_pos;
+ fields[0].num_bits = 6;
+ fields[0].out_value = &cmd;
+ fields[0].out_mask = NULL;
+ fields[0].in_value = NULL;
+ fields[0].in_check_value = NULL;
+ fields[0].in_check_mask = NULL;
+ fields[0].in_handler = NULL;
+ fields[0].in_handler_priv = NULL;
+
+ fields[1].device = xscale->jtag_info.chain_pos;
+ fields[1].num_bits = 27;
+ fields[1].out_value = packet;
+ fields[1].out_mask = NULL;
+ fields[1].in_value = NULL;
+ fields[1].in_check_value = NULL;
+ fields[1].in_check_mask = NULL;
+ fields[1].in_handler = NULL;
+ fields[1].in_handler_priv = NULL;
+
+ jtag_add_dr_scan(2, fields, -1);
+
+ return ERROR_OK;
+}
+
+int xscale_update_vectors(target_t *target)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ int i;
+
+ u32 low_reset_branch, high_reset_branch;
+
+ for (i = 1; i < 8; i++)
+ {
+ /* if there's a static vector specified for this exception, override */
+ if (xscale->static_high_vectors_set & (1 << i))
+ {
+ xscale->high_vectors[i] = xscale->static_high_vectors[i];
+ }
+ else
+ {
+ if (target_read_u32(target, 0xffff0000 + 4*i, &xscale->high_vectors[i]) != ERROR_OK)
+ {
+ xscale->high_vectors[i] = ARMV4_5_B(0xfffffe, 0);
+ }
+ }
+ }
+
+ for (i = 1; i < 8; i++)
+ {
+ if (xscale->static_low_vectors_set & (1 << i))
+ {
+ xscale->low_vectors[i] = xscale->static_low_vectors[i];
+ }
+ else
+ {
+ if (target_read_u32(target, 0x0 + 4*i, &xscale->low_vectors[i]) != ERROR_OK)
+ {
+ xscale->low_vectors[i] = ARMV4_5_B(0xfffffe, 0);
+ }
+ }
+ }
+
+ /* calculate branches to debug handler */
+ low_reset_branch = (xscale->handler_address + 0x20 - 0x0 - 0x8) >> 2;
+ high_reset_branch = (xscale->handler_address + 0x20 - 0xffff0000 - 0x8) >> 2;
+
+ xscale->low_vectors[0] = ARMV4_5_B((low_reset_branch & 0xffffff), 0);
+ xscale->high_vectors[0] = ARMV4_5_B((high_reset_branch & 0xffffff), 0);
+
+ /* invalidate and load exception vectors in mini i-cache */
+ xscale_invalidate_ic_line(target, 0x0);
+ xscale_invalidate_ic_line(target, 0xffff0000);
+
+ xscale_load_ic(target, 1, 0x0, xscale->low_vectors);
+ xscale_load_ic(target, 1, 0xffff0000, xscale->high_vectors);
+
+ return ERROR_OK;
+}
+
+int xscale_arch_state(struct target_s *target)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ char *state[] =
+ {
+ "disabled", "enabled"
+ };
+
+ char *arch_dbg_reason[] =
+ {
+ "", "\n(processor reset)", "\n(trace buffer full)"
+ };
+
+ if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
+ {
+ ERROR("BUG: called for a non-ARMv4/5 target");
+ exit(-1);
+ }
+
+ USER("target halted in %s state due to %s, current mode: %s\n"
+ "cpsr: 0x%8.8x pc: 0x%8.8x\n"
+ "MMU: %s, D-Cache: %s, I-Cache: %s"
+ "%s",
+ armv4_5_state_strings[armv4_5->core_state],
+ target_debug_reason_strings[target->debug_reason],
+ armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
+ buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
+ buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
+ state[xscale->armv4_5_mmu.mmu_enabled],
+ state[xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
+ state[xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled],
+ arch_dbg_reason[xscale->arch_debug_reason]);
+
+ return ERROR_OK;
+}
+
+int xscale_poll(target_t *target)
+{
+ int retval=ERROR_OK;
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ if ((target->state == TARGET_RUNNING) || (target->state == TARGET_DEBUG_RUNNING))
+ {
+ enum target_state previous_state = target->state;
+ if ((retval = xscale_read_tx(target, 0)) == ERROR_OK)
+ {
+
+ /* there's data to read from the tx register, we entered debug state */
+ xscale->handler_running = 1;
+
+ target->state = TARGET_HALTED;
+
+ /* process debug entry, fetching current mode regs */
+ retval = xscale_debug_entry(target);
+ }
+ else if (retval != ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
+ {
+ USER("error while polling TX register, reset CPU");
+ /* here we "lie" so GDB won't get stuck and a reset can be perfomed */
+ target->state = TARGET_HALTED;
+ }
+
+ /* debug_entry could have overwritten target state (i.e. immediate resume)
+ * don't signal event handlers in that case
+ */
+ if (target->state != TARGET_HALTED)
+ return ERROR_OK;
+
+ /* if target was running, signal that we halted
+ * otherwise we reentered from debug execution */
+ if (previous_state == TARGET_RUNNING)
+ target_call_event_callbacks(target, TARGET_EVENT_HALTED);
+ else
+ target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
+ }
+ return retval;
+}
+
+int xscale_debug_entry(target_t *target)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ u32 pc;
+ u32 buffer[10];
+ int i;
+
+ u32 moe;
+
+ /* clear external dbg break (will be written on next DCSR read) */
+ xscale->external_debug_break = 0;
+ xscale_read_dcsr(target);
+
+ /* get r0, pc, r1 to r7 and cpsr */
+ xscale_receive(target, buffer, 10);
+
+ /* move r0 from buffer to register cache */
+ buf_set_u32(armv4_5->core_cache->reg_list[0].value, 0, 32, buffer[0]);
+ armv4_5->core_cache->reg_list[15].dirty = 1;
+ armv4_5->core_cache->reg_list[15].valid = 1;
+ DEBUG("r0: 0x%8.8x", buffer[0]);
+
+ /* move pc from buffer to register cache */
+ buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, buffer[1]);
+ armv4_5->core_cache->reg_list[15].dirty = 1;
+ armv4_5->core_cache->reg_list[15].valid = 1;
+ DEBUG("pc: 0x%8.8x", buffer[1]);
+
+ /* move data from buffer to register cache */
+ for (i = 1; i <= 7; i++)
+ {
+ buf_set_u32(armv4_5->core_cache->reg_list[i].value, 0, 32, buffer[1 + i]);
+ armv4_5->core_cache->reg_list[i].dirty = 1;
+ armv4_5->core_cache->reg_list[i].valid = 1;
+ DEBUG("r%i: 0x%8.8x", i, buffer[i + 1]);
+ }
+
+ buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, buffer[9]);
+ armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
+ armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
+ DEBUG("cpsr: 0x%8.8x", buffer[9]);
+
+ armv4_5->core_mode = buffer[9] & 0x1f;
+ if (armv4_5_mode_to_number(armv4_5->core_mode) == -1)
+ {
+ target->state = TARGET_UNKNOWN;
+ ERROR("cpsr contains invalid mode value - communication failure");
+ return ERROR_TARGET_FAILURE;
+ }
+ DEBUG("target entered debug state in %s mode", armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)]);
+
+ if (buffer[9] & 0x20)
+ armv4_5->core_state = ARMV4_5_STATE_THUMB;
+ else
+ armv4_5->core_state = ARMV4_5_STATE_ARM;
+
+ /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
+ if ((armv4_5->core_mode != ARMV4_5_MODE_USR) && (armv4_5->core_mode != ARMV4_5_MODE_SYS))
+ {
+ xscale_receive(target, buffer, 8);
+ buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, buffer[7]);
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).dirty = 0;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).valid = 1;
+ }
+ else
+ {
+ /* r8 to r14, but no spsr */
+ xscale_receive(target, buffer, 7);
+ }
+
+ /* move data from buffer to register cache */
+ for (i = 8; i <= 14; i++)
+ {
+ buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).value, 0, 32, buffer[i - 8]);
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = 0;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid = 1;
+ }
+
+ /* examine debug reason */
+ xscale_read_dcsr(target);
+ moe = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 2, 3);
+
+ /* stored PC (for calculating fixup) */
+ pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
+
+ switch (moe)
+ {
+ case 0x0: /* Processor reset */
+ target->debug_reason = DBG_REASON_DBGRQ;
+ xscale->arch_debug_reason = XSCALE_DBG_REASON_RESET;
+ pc -= 4;
+ break;
+ case 0x1: /* Instruction breakpoint hit */
+ target->debug_reason = DBG_REASON_BREAKPOINT;
+ xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
+ pc -= 4;
+ break;
+ case 0x2: /* Data breakpoint hit */
+ target->debug_reason = DBG_REASON_WATCHPOINT;
+ xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
+ pc -= 4;
+ break;
+ case 0x3: /* BKPT instruction executed */
+ target->debug_reason = DBG_REASON_BREAKPOINT;
+ xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
+ pc -= 4;
+ break;
+ case 0x4: /* Ext. debug event */
+ target->debug_reason = DBG_REASON_DBGRQ;
+ xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
+ pc -= 4;
+ break;
+ case 0x5: /* Vector trap occured */
+ target->debug_reason = DBG_REASON_BREAKPOINT;
+ xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
+ pc -= 4;
+ break;
+ case 0x6: /* Trace buffer full break */
+ target->debug_reason = DBG_REASON_DBGRQ;
+ xscale->arch_debug_reason = XSCALE_DBG_REASON_TB_FULL;
+ pc -= 4;
+ break;
+ case 0x7: /* Reserved */
+ default:
+ ERROR("Method of Entry is 'Reserved'");
+ exit(-1);
+ break;
+ }
+
+ /* apply PC fixup */
+ buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, pc);
+
+ /* on the first debug entry, identify cache type */
+ if (xscale->armv4_5_mmu.armv4_5_cache.ctype == -1)
+ {
+ u32 cache_type_reg;
+
+ /* read cp15 cache type register */
+ xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CACHETYPE]);
+ cache_type_reg = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CACHETYPE].value, 0, 32);
+
+ armv4_5_identify_cache(cache_type_reg, &xscale->armv4_5_mmu.armv4_5_cache);
+ }
+
+ /* examine MMU and Cache settings */
+ /* read cp15 control register */
+ xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
+ xscale->cp15_control_reg = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
+ xscale->armv4_5_mmu.mmu_enabled = (xscale->cp15_control_reg & 0x1U) ? 1 : 0;
+ xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (xscale->cp15_control_reg & 0x4U) ? 1 : 0;
+ xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (xscale->cp15_control_reg & 0x1000U) ? 1 : 0;
+
+ /* tracing enabled, read collected trace data */
+ if (xscale->trace.buffer_enabled)
+ {
+ xscale_read_trace(target);
+ xscale->trace.buffer_fill--;
+
+ /* resume if we're still collecting trace data */
+ if ((xscale->arch_debug_reason == XSCALE_DBG_REASON_TB_FULL)
+ && (xscale->trace.buffer_fill > 0))
+ {
+ xscale_resume(target, 1, 0x0, 1, 0);
+ }
+ else
+ {
+ xscale->trace.buffer_enabled = 0;
+ }
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_halt(target_t *target)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ DEBUG("target->state: %s", target_state_strings[target->state]);
+
+ if (target->state == TARGET_HALTED)
+ {
+ WARNING("target was already halted");
+ return ERROR_TARGET_ALREADY_HALTED;
+ }
+ else if (target->state == TARGET_UNKNOWN)
+ {
+ /* this must not happen for a xscale target */
+ ERROR("target was in unknown state when halt was requested");
+ return ERROR_TARGET_INVALID;
+ }
+ else if (target->state == TARGET_RESET)
+ {
+ DEBUG("target->state == TARGET_RESET");
+ }
+ else
+ {
+ /* assert external dbg break */
+ xscale->external_debug_break = 1;
+ xscale_read_dcsr(target);
+
+ target->debug_reason = DBG_REASON_DBGRQ;
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_enable_single_step(struct target_s *target, u32 next_pc)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale= armv4_5->arch_info;
+ reg_t *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0];
+
+ if (xscale->ibcr0_used)
+ {
+ breakpoint_t *ibcr0_bp = breakpoint_find(target, buf_get_u32(ibcr0->value, 0, 32) & 0xfffffffe);
+
+ if (ibcr0_bp)
+ {
+ xscale_unset_breakpoint(target, ibcr0_bp);
+ }
+ else
+ {
+ ERROR("BUG: xscale->ibcr0_used is set, but no breakpoint with that address found");
+ exit(-1);
+ }
+ }
+
+ xscale_set_reg_u32(ibcr0, next_pc | 0x1);
+
+ return ERROR_OK;
+}
+
+int xscale_disable_single_step(struct target_s *target)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale= armv4_5->arch_info;
+ reg_t *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0];
+
+ xscale_set_reg_u32(ibcr0, 0x0);
+
+ return ERROR_OK;
+}
+
+int xscale_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale= armv4_5->arch_info;
+ breakpoint_t *breakpoint = target->breakpoints;
+
+ u32 current_pc;
+
+ int retval;
+ int i;
+
+ DEBUG("-");
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (!debug_execution)
+ {
+ target_free_all_working_areas(target);
+ }
+
+ /* update vector tables */
+ xscale_update_vectors(target);
+
+ /* current = 1: continue on current pc, otherwise continue at <address> */
+ if (!current)
+ buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
+
+ current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
+
+ /* if we're at the reset vector, we have to simulate the branch */
+ if (current_pc == 0x0)
+ {
+ arm_simulate_step(target, NULL);
+ current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
+ }
+
+ /* the front-end may request us not to handle breakpoints */
+ if (handle_breakpoints)
+ {
+ if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
+ {
+ u32 next_pc;
+
+ /* there's a breakpoint at the current PC, we have to step over it */
+ DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address);
+ xscale_unset_breakpoint(target, breakpoint);
+
+ /* calculate PC of next instruction */
+ if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK)
+ {
+ u32 current_opcode;
+ target_read_u32(target, current_pc, ¤t_opcode);
+ ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8x", current_opcode);
+ }
+
+ DEBUG("enable single-step");
+ xscale_enable_single_step(target, next_pc);
+
+ /* restore banked registers */
+ xscale_restore_context(target);
+
+ /* send resume request (command 0x30 or 0x31)
+ * clean the trace buffer if it is to be enabled (0x62) */
+ if (xscale->trace.buffer_enabled)
+ {
+ xscale_send_u32(target, 0x62);
+ xscale_send_u32(target, 0x31);
+ }
+ else
+ xscale_send_u32(target, 0x30);
+
+ /* send CPSR */
+ xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
+ DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
+
+ for (i = 7; i >= 0; i--)
+ {
+ /* send register */
+ xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
+ DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
+ }
+
+ /* send PC */
+ xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
+ DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
+
+ /* wait for and process debug entry */
+ xscale_debug_entry(target);
+
+ DEBUG("disable single-step");
+ xscale_disable_single_step(target);
+
+ DEBUG("set breakpoint at 0x%8.8x", breakpoint->address);
+ xscale_set_breakpoint(target, breakpoint);
+ }
+ }
+
+ /* enable any pending breakpoints and watchpoints */
+ xscale_enable_breakpoints(target);
+ xscale_enable_watchpoints(target);
+
+ /* restore banked registers */
+ xscale_restore_context(target);
+
+ /* send resume request (command 0x30 or 0x31)
+ * clean the trace buffer if it is to be enabled (0x62) */
+ if (xscale->trace.buffer_enabled)
+ {
+ xscale_send_u32(target, 0x62);
+ xscale_send_u32(target, 0x31);
+ }
+ else
+ xscale_send_u32(target, 0x30);
+
+ /* send CPSR */
+ xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
+ DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
+
+ for (i = 7; i >= 0; i--)
+ {
+ /* send register */
+ xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
+ DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
+ }
+
+ /* send PC */
+ xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
+ DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
+
+ target->debug_reason = DBG_REASON_NOTHALTED;
+
+ if (!debug_execution)
+ {
+ /* registers are now invalid */
+ armv4_5_invalidate_core_regs(target);
+ target->state = TARGET_RUNNING;
+ target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
+ }
+ else
+ {
+ target->state = TARGET_DEBUG_RUNNING;
+ target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
+ }
+
+ DEBUG("target resumed");
+
+ xscale->handler_running = 1;
+
+ return ERROR_OK;
+}
+
+int xscale_step(struct target_s *target, int current, u32 address, int handle_breakpoints)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ breakpoint_t *breakpoint = target->breakpoints;
+
+ u32 current_pc, next_pc;
+ int i;
+ int retval;
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ /* current = 1: continue on current pc, otherwise continue at <address> */
+ if (!current)
+ buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
+
+ current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
+
+ /* if we're at the reset vector, we have to simulate the step */
+ if (current_pc == 0x0)
+ {
+ arm_simulate_step(target, NULL);
+ current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
+
+ target->debug_reason = DBG_REASON_SINGLESTEP;
+ target_call_event_callbacks(target, TARGET_EVENT_HALTED);
+
+ return ERROR_OK;
+ }
+
+ /* the front-end may request us not to handle breakpoints */
+ if (handle_breakpoints)
+ if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
+ {
+ xscale_unset_breakpoint(target, breakpoint);
+ }
+
+ target->debug_reason = DBG_REASON_SINGLESTEP;
+
+ /* calculate PC of next instruction */
+ if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK)
+ {
+ u32 current_opcode;
+ target_read_u32(target, current_pc, ¤t_opcode);
+ ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8x", current_opcode);
+ }
+
+ DEBUG("enable single-step");
+ xscale_enable_single_step(target, next_pc);
+
+ /* restore banked registers */
+ xscale_restore_context(target);
+
+ /* send resume request (command 0x30 or 0x31)
+ * clean the trace buffer if it is to be enabled (0x62) */
+ if (xscale->trace.buffer_enabled)
+ {
+ xscale_send_u32(target, 0x62);
+ xscale_send_u32(target, 0x31);
+ }
+ else
+ xscale_send_u32(target, 0x30);
+
+ /* send CPSR */
+ xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
+ DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
+
+ for (i = 7; i >= 0; i--)
+ {
+ /* send register */
+ xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
+ DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
+ }
+
+ /* send PC */
+ xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
+ DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
+
+ target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
+
+ /* registers are now invalid */
+ armv4_5_invalidate_core_regs(target);
+
+ /* wait for and process debug entry */
+ xscale_debug_entry(target);
+
+ DEBUG("disable single-step");
+ xscale_disable_single_step(target);
+
+ target_call_event_callbacks(target, TARGET_EVENT_HALTED);
+
+ if (breakpoint)
+ {
+ xscale_set_breakpoint(target, breakpoint);
+ }
+
+ DEBUG("target stepped");
+
+ return ERROR_OK;
+
+}
+
+int xscale_assert_reset(target_t *target)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ DEBUG("target->state: %s", target_state_strings[target->state]);
+
+ /* select DCSR instruction (set endstate to R-T-I to ensure we don't
+ * end up in T-L-R, which would reset JTAG
+ */
+ jtag_add_end_state(TAP_RTI);
+ xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr);
+
+ /* set Hold reset, Halt mode and Trap Reset */
+ buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
+ buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
+ xscale_write_dcsr(target, 1, 0);
+
+ /* select BYPASS, because having DCSR selected caused problems on the PXA27x */
+ xscale_jtag_set_instr(xscale->jtag_info.chain_pos, 0x7f);
+ jtag_execute_queue();
+
+ /* assert reset */
+ jtag_add_reset(0, 1);
+
+ /* sleep 1ms, to be sure we fulfill any requirements */
+ jtag_add_sleep(1000);
+ jtag_execute_queue();
+
+ target->state = TARGET_RESET;
+
+ return ERROR_OK;
+}
+
+int xscale_deassert_reset(target_t *target)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ fileio_t debug_handler;
+ u32 address;
+ u32 binary_size;
+
+ u32 buf_cnt;
+ int i;
+ int retval;
+
+ breakpoint_t *breakpoint = target->breakpoints;
+
+ DEBUG("-");
+
+ xscale->ibcr_available = 2;
+ xscale->ibcr0_used = 0;
+ xscale->ibcr1_used = 0;
+
+ xscale->dbr_available = 2;
+ xscale->dbr0_used = 0;
+ xscale->dbr1_used = 0;
+
+ /* mark all hardware breakpoints as unset */
+ while (breakpoint)
+ {
+ if (breakpoint->type == BKPT_HARD)
+ {
+ breakpoint->set = 0;
+ }
+ breakpoint = breakpoint->next;
+ }
+
+ if (!xscale->handler_installed)
+ {
+ /* release SRST */
+ jtag_add_reset(0, 0);
+
+ /* wait 300ms; 150 and 100ms were not enough */
+ jtag_add_sleep(300*1000);
+
+ jtag_add_runtest(2030, TAP_RTI);
+ jtag_execute_queue();
+
+ /* set Hold reset, Halt mode and Trap Reset */
+ buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
+ buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
+ xscale_write_dcsr(target, 1, 0);
+
+ /* Load debug handler */
+ if (fileio_open(&debug_handler, PKGLIBDIR "/xscale/debug_handler.bin", FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
+ {
+ ERROR("file open error: %s", debug_handler.error_str);
+ return ERROR_OK;
+ }
+
+ if ((binary_size = debug_handler.size) % 4)
+ {
+ ERROR("debug_handler.bin: size not a multiple of 4");
+ exit(-1);
+ }
+
+ if (binary_size > 0x800)
+ {
+ ERROR("debug_handler.bin: larger than 2kb");
+ exit(-1);
+ }
+
+ binary_size = CEIL(binary_size, 32) * 32;
+
+ address = xscale->handler_address;
+ while (binary_size > 0)
+ {
+ u32 cache_line[8];
+ u8 buffer[32];
+
+ if ((retval = fileio_read(&debug_handler, 32, buffer, &buf_cnt)) != ERROR_OK)
+ {
+ ERROR("reading debug handler failed: %s", debug_handler.error_str);
+ }
+
+ for (i = 0; i < buf_cnt; i += 4)
+ {
+ /* convert LE buffer to host-endian u32 */
+ cache_line[i / 4] = le_to_h_u32(&buffer[i]);
+ }
+
+ for (; buf_cnt < 32; buf_cnt += 4)
+ {
+ cache_line[buf_cnt / 4] = 0xe1a08008;
+ }
+
+ /* only load addresses other than the reset vectors */
+ if ((address % 0x400) != 0x0)
+ {
+ xscale_load_ic(target, 1, address, cache_line);
+ }
+
+ address += buf_cnt;
+ binary_size -= buf_cnt;
+ };
+
+ xscale_load_ic(target, 1, 0x0, xscale->low_vectors);
+ xscale_load_ic(target, 1, 0xffff0000, xscale->high_vectors);
+
+ jtag_add_runtest(30, TAP_RTI);
+
+ jtag_add_sleep(100000);
+
+ /* set Hold reset, Halt mode and Trap Reset */
+ buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
+ buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
+ xscale_write_dcsr(target, 1, 0);
+
+ /* clear Hold reset to let the target run (should enter debug handler) */
+ xscale_write_dcsr(target, 0, 1);
+ target->state = TARGET_RUNNING;
+
+ if ((target->reset_mode != RESET_HALT) && (target->reset_mode != RESET_INIT))
+ {
+ jtag_add_sleep(10000);
+
+ /* we should have entered debug now */
+ xscale_debug_entry(target);
+ target->state = TARGET_HALTED;
+
+ /* resume the target */
+ xscale_resume(target, 1, 0x0, 1, 0);
+ }
+
+ fileio_close(&debug_handler);
+ }
+ else
+ {
+ jtag_add_reset(0, 0);
+ }
+
+
+ return ERROR_OK;
+}
+
+int xscale_soft_reset_halt(struct target_s *target)
+{
+
+ return ERROR_OK;
+}
+
+int xscale_prepare_reset_halt(struct target_s *target)
+{
+ /* nothing to be done for reset_halt on XScale targets
+ * we always halt after a reset to upload the debug handler
+ */
+ return ERROR_OK;
+}
+
+int xscale_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode)
+{
+
+ return ERROR_OK;
+}
+
+int xscale_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, u32 value)
+{
+
+ return ERROR_OK;
+}
+
+int xscale_full_context(target_t *target)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+
+ u32 *buffer;
+
+ int i, j;
+
+ DEBUG("-");
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ buffer = malloc(4 * 8);
+
+ /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
+ * we can't enter User mode on an XScale (unpredictable),
+ * but User shares registers with SYS
+ */
+ for(i = 1; i < 7; i++)
+ {
+ int valid = 1;
+
+ /* check if there are invalid registers in the current mode
+ */
+ for (j = 0; j <= 16; j++)
+ {
+ if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid == 0)
+ valid = 0;
+ }
+
+ if (!valid)
+ {
+ u32 tmp_cpsr;
+
+ /* request banked registers */
+ xscale_send_u32(target, 0x0);
+
+ tmp_cpsr = 0x0;
+ tmp_cpsr |= armv4_5_number_to_mode(i);
+ tmp_cpsr |= 0xc0; /* I/F bits */
+
+ /* send CPSR for desired mode */
+ xscale_send_u32(target, tmp_cpsr);
+
+ /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
+ if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS))
+ {
+ xscale_receive(target, buffer, 8);
+ buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, buffer[7]);
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).valid = 1;
+ }
+ else
+ {
+ xscale_receive(target, buffer, 7);
+ }
+
+ /* move data from buffer to register cache */
+ for (j = 8; j <= 14; j++)
+ {
+ buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).value, 0, 32, buffer[j - 8]);
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0;
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid = 1;
+ }
+ }
+ }
+
+ free(buffer);
+
+ return ERROR_OK;
+}
+
+int xscale_restore_context(target_t *target)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+
+ int i, j;
+
+ DEBUG("-");
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
+ * we can't enter User mode on an XScale (unpredictable),
+ * but User shares registers with SYS
+ */
+ for(i = 1; i < 7; i++)
+ {
+ int dirty = 0;
+
+ /* check if there are invalid registers in the current mode
+ */
+ for (j = 8; j <= 14; j++)
+ {
+ if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty == 1)
+ dirty = 1;
+ }
+
+ /* if not USR/SYS, check if the SPSR needs to be written */
+ if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS))
+ {
+ if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty == 1)
+ dirty = 1;
+ }
+
+ if (dirty)
+ {
+ u32 tmp_cpsr;
+
+ /* send banked registers */
+ xscale_send_u32(target, 0x1);
+
+ tmp_cpsr = 0x0;
+ tmp_cpsr |= armv4_5_number_to_mode(i);
+ tmp_cpsr |= 0xc0; /* I/F bits */
+
+ /* send CPSR for desired mode */
+ xscale_send_u32(target, tmp_cpsr);
+
+ /* send banked registers, r8 to r14, and spsr if not in USR/SYS mode */
+ for (j = 8; j <= 14; j++)
+ {
+ xscale_send_u32(target, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, j).value, 0, 32));
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0;
+ }
+
+ if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS))
+ {
+ xscale_send_u32(target, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32));
+ ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0;
+ }
+ }
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ u32 *buf32;
+ int i;
+
+ DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ /* sanitize arguments */
+ if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
+ return ERROR_INVALID_ARGUMENTS;
+
+ if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
+ return ERROR_TARGET_UNALIGNED_ACCESS;
+
+ /* send memory read request (command 0x1n, n: access size) */
+ xscale_send_u32(target, 0x10 | size);
+
+ /* send base address for read request */
+ xscale_send_u32(target, address);
+
+ /* send number of requested data words */
+ xscale_send_u32(target, count);
+
+ /* receive data from target (count times 32-bit words in host endianness) */
+ buf32 = malloc(4 * count);
+ xscale_receive(target, buf32, count);
+
+ /* extract data from host-endian buffer into byte stream */
+ for (i = 0; i < count; i++)
+ {
+ switch (size)
+ {
+ case 4:
+ target_buffer_set_u32(target, buffer, buf32[i]);
+ buffer += 4;
+ break;
+ case 2:
+ target_buffer_set_u16(target, buffer, buf32[i] & 0xffff);
+ buffer += 2;
+ break;
+ case 1:
+ *buffer++ = buf32[i] & 0xff;
+ break;
+ default:
+ ERROR("should never get here");
+ exit(-1);
+ }
+ }
+
+ free(buf32);
+
+ /* examine DCSR, to see if Sticky Abort (SA) got set */
+ xscale_read_dcsr(target);
+ if (buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 5, 1) == 1)
+ {
+ /* clear SA bit */
+ xscale_send_u32(target, 0x60);
+
+ return ERROR_TARGET_DATA_ABORT;
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ /* sanitize arguments */
+ if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
+ return ERROR_INVALID_ARGUMENTS;
+
+ if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
+ return ERROR_TARGET_UNALIGNED_ACCESS;
+
+ /* send memory write request (command 0x2n, n: access size) */
+ xscale_send_u32(target, 0x20 | size);
+
+ /* send base address for read request */
+ xscale_send_u32(target, address);
+
+ /* send number of requested data words to be written*/
+ xscale_send_u32(target, count);
+
+ /* extract data from host-endian buffer into byte stream */
+#if 0
+ for (i = 0; i < count; i++)
+ {
+ switch (size)
+ {
+ case 4:
+ value = target_buffer_get_u32(target, buffer);
+ xscale_send_u32(target, value);
+ buffer += 4;
+ break;
+ case 2:
+ value = target_buffer_get_u16(target, buffer);
+ xscale_send_u32(target, value);
+ buffer += 2;
+ break;
+ case 1:
+ value = *buffer;
+ xscale_send_u32(target, value);
+ buffer += 1;
+ break;
+ default:
+ ERROR("should never get here");
+ exit(-1);
+ }
+ }
+#endif
+ xscale_send(target, buffer, count, size);
+
+ /* examine DCSR, to see if Sticky Abort (SA) got set */
+ xscale_read_dcsr(target);
+ if (buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 5, 1) == 1)
+ {
+ /* clear SA bit */
+ xscale_send_u32(target, 0x60);
+
+ return ERROR_TARGET_DATA_ABORT;
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer)
+{
+ return xscale_write_memory(target, address, 4, count, buffer);
+}
+
+int xscale_checksum_memory(struct target_s *target, u32 address, u32 count, u32* checksum)
+{
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+}
+
+u32 xscale_get_ttb(target_t *target)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ u32 ttb;
+
+ xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_TTB]);
+ ttb = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_TTB].value, 0, 32);
+
+ return ttb;
+}
+
+void xscale_disable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ u32 cp15_control;
+
+ /* read cp15 control register */
+ xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
+ cp15_control = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
+
+ if (mmu)
+ cp15_control &= ~0x1U;
+
+ if (d_u_cache)
+ {
+ /* clean DCache */
+ xscale_send_u32(target, 0x50);
+ xscale_send_u32(target, xscale->cache_clean_address);
+
+ /* invalidate DCache */
+ xscale_send_u32(target, 0x51);
+
+ cp15_control &= ~0x4U;
+ }
+
+ if (i_cache)
+ {
+ /* invalidate ICache */
+ xscale_send_u32(target, 0x52);
+ cp15_control &= ~0x1000U;
+ }
+
+ /* write new cp15 control register */
+ xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_CTRL], cp15_control);
+
+ /* execute cpwait to ensure outstanding operations complete */
+ xscale_send_u32(target, 0x53);
+}
+
+void xscale_enable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ u32 cp15_control;
+
+ /* read cp15 control register */
+ xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
+ cp15_control = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
+
+ if (mmu)
+ cp15_control |= 0x1U;
+
+ if (d_u_cache)
+ cp15_control |= 0x4U;
+
+ if (i_cache)
+ cp15_control |= 0x1000U;
+
+ /* write new cp15 control register */
+ xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_CTRL], cp15_control);
+
+ /* execute cpwait to ensure outstanding operations complete */
+ xscale_send_u32(target, 0x53);
+}
+
+int xscale_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (xscale->force_hw_bkpts)
+ breakpoint->type = BKPT_HARD;
+
+ if (breakpoint->set)
+ {
+ WARNING("breakpoint already set");
+ return ERROR_OK;
+ }
+
+ if (breakpoint->type == BKPT_HARD)
+ {
+ u32 value = breakpoint->address | 1;
+ if (!xscale->ibcr0_used)
+ {
+ xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR0], value);
+ xscale->ibcr0_used = 1;
+ breakpoint->set = 1; /* breakpoint set on first breakpoint register */
+ }
+ else if (!xscale->ibcr1_used)
+ {
+ xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR1], value);
+ xscale->ibcr1_used = 1;
+ breakpoint->set = 2; /* breakpoint set on second breakpoint register */
+ }
+ else
+ {
+ ERROR("BUG: no hardware comparator available");
+ return ERROR_OK;
+ }
+ }
+ else if (breakpoint->type == BKPT_SOFT)
+ {
+ if (breakpoint->length == 4)
+ {
+ /* keep the original instruction in target endianness */
+ target->type->read_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr);
+ /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */
+ target_write_u32(target, breakpoint->address, xscale->arm_bkpt);
+ }
+ else
+ {
+ /* keep the original instruction in target endianness */
+ target->type->read_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr);
+ /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */
+ target_write_u32(target, breakpoint->address, xscale->thumb_bkpt);
+ }
+ breakpoint->set = 1;
+ }
+
+ return ERROR_OK;
+
+}
+
+int xscale_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (xscale->force_hw_bkpts)
+ {
+ DEBUG("forcing use of hardware breakpoint at address 0x%8.8x", breakpoint->address);
+ breakpoint->type = BKPT_HARD;
+ }
+
+ if ((breakpoint->type == BKPT_HARD) && (xscale->ibcr_available < 1))
+ {
+ INFO("no breakpoint unit available for hardware breakpoint");
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ }
+ else
+ {
+ xscale->ibcr_available--;
+ }
+
+ if ((breakpoint->length != 2) && (breakpoint->length != 4))
+ {
+ INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (!breakpoint->set)
+ {
+ WARNING("breakpoint not set");
+ return ERROR_OK;
+ }
+
+ if (breakpoint->type == BKPT_HARD)
+ {
+ if (breakpoint->set == 1)
+ {
+ xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR0], 0x0);
+ xscale->ibcr0_used = 0;
+ }
+ else if (breakpoint->set == 2)
+ {
+ xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR1], 0x0);
+ xscale->ibcr1_used = 0;
+ }
+ breakpoint->set = 0;
+ }
+ else
+ {
+ /* restore original instruction (kept in target endianness) */
+ if (breakpoint->length == 4)
+ {
+ target->type->write_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr);
+ }
+ else
+ {
+ target->type->write_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr);
+ }
+ breakpoint->set = 0;
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (breakpoint->set)
+ {
+ xscale_unset_breakpoint(target, breakpoint);
+ }
+
+ if (breakpoint->type == BKPT_HARD)
+ xscale->ibcr_available++;
+
+ return ERROR_OK;
+}
+
+int xscale_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ u8 enable = 0;
+ reg_t *dbcon = &xscale->reg_cache->reg_list[XSCALE_DBCON];
+ u32 dbcon_value = buf_get_u32(dbcon->value, 0, 32);
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ xscale_get_reg(dbcon);
+
+ switch (watchpoint->rw)
+ {
+ case WPT_READ:
+ enable = 0x3;
+ break;
+ case WPT_ACCESS:
+ enable = 0x2;
+ break;
+ case WPT_WRITE:
+ enable = 0x1;
+ break;
+ default:
+ ERROR("BUG: watchpoint->rw neither read, write nor access");
+ }
+
+ if (!xscale->dbr0_used)
+ {
+ xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR0], watchpoint->address);
+ dbcon_value |= enable;
+ xscale_set_reg_u32(dbcon, dbcon_value);
+ watchpoint->set = 1;
+ xscale->dbr0_used = 1;
+ }
+ else if (!xscale->dbr1_used)
+ {
+ xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR1], watchpoint->address);
+ dbcon_value |= enable << 2;
+ xscale_set_reg_u32(dbcon, dbcon_value);
+ watchpoint->set = 2;
+ xscale->dbr1_used = 1;
+ }
+ else
+ {
+ ERROR("BUG: no hardware comparator available");
+ return ERROR_OK;
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (xscale->dbr_available < 1)
+ {
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ }
+
+ if ((watchpoint->length != 1) && (watchpoint->length != 2) && (watchpoint->length != 4))
+ {
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ }
+
+ xscale->dbr_available--;
+
+ return ERROR_OK;
+}
+
+int xscale_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ reg_t *dbcon = &xscale->reg_cache->reg_list[XSCALE_DBCON];
+ u32 dbcon_value = buf_get_u32(dbcon->value, 0, 32);
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (!watchpoint->set)
+ {
+ WARNING("breakpoint not set");
+ return ERROR_OK;
+ }
+
+ if (watchpoint->set == 1)
+ {
+ dbcon_value &= ~0x3;
+ xscale_set_reg_u32(dbcon, dbcon_value);
+ xscale->dbr0_used = 0;
+ }
+ else if (watchpoint->set == 2)
+ {
+ dbcon_value &= ~0xc;
+ xscale_set_reg_u32(dbcon, dbcon_value);
+ xscale->dbr1_used = 0;
+ }
+ watchpoint->set = 0;
+
+ return ERROR_OK;
+}
+
+int xscale_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (watchpoint->set)
+ {
+ xscale_unset_watchpoint(target, watchpoint);
+ }
+
+ xscale->dbr_available++;
+
+ return ERROR_OK;
+}
+
+void xscale_enable_watchpoints(struct target_s *target)
+{
+ watchpoint_t *watchpoint = target->watchpoints;
+
+ while (watchpoint)
+ {
+ if (watchpoint->set == 0)
+ xscale_set_watchpoint(target, watchpoint);
+ watchpoint = watchpoint->next;
+ }
+}
+
+void xscale_enable_breakpoints(struct target_s *target)
+{
+ breakpoint_t *breakpoint = target->breakpoints;
+
+ /* set any pending breakpoints */
+ while (breakpoint)
+ {
+ if (breakpoint->set == 0)
+ xscale_set_breakpoint(target, breakpoint);
+ breakpoint = breakpoint->next;
+ }
+}
+
+int xscale_get_reg(reg_t *reg)
+{
+ xscale_reg_t *arch_info = reg->arch_info;
+ target_t *target = arch_info->target;
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ /* DCSR, TX and RX are accessible via JTAG */
+ if (strcmp(reg->name, "XSCALE_DCSR") == 0)
+ {
+ return xscale_read_dcsr(arch_info->target);
+ }
+ else if (strcmp(reg->name, "XSCALE_TX") == 0)
+ {
+ /* 1 = consume register content */
+ return xscale_read_tx(arch_info->target, 1);
+ }
+ else if (strcmp(reg->name, "XSCALE_RX") == 0)
+ {
+ /* can't read from RX register (host -> debug handler) */
+ return ERROR_OK;
+ }
+ else if (strcmp(reg->name, "XSCALE_TXRXCTRL") == 0)
+ {
+ /* can't (explicitly) read from TXRXCTRL register */
+ return ERROR_OK;
+ }
+ else /* Other DBG registers have to be transfered by the debug handler */
+ {
+ /* send CP read request (command 0x40) */
+ xscale_send_u32(target, 0x40);
+
+ /* send CP register number */
+ xscale_send_u32(target, arch_info->dbg_handler_number);
+
+ /* read register value */
+ xscale_read_tx(target, 1);
+ buf_cpy(xscale->reg_cache->reg_list[XSCALE_TX].value, reg->value, 32);
+
+ reg->dirty = 0;
+ reg->valid = 1;
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_set_reg(reg_t *reg, u8* buf)
+{
+ xscale_reg_t *arch_info = reg->arch_info;
+ target_t *target = arch_info->target;
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ u32 value = buf_get_u32(buf, 0, 32);
+
+ /* DCSR, TX and RX are accessible via JTAG */
+ if (strcmp(reg->name, "XSCALE_DCSR") == 0)
+ {
+ buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 0, 32, value);
+ return xscale_write_dcsr(arch_info->target, -1, -1);
+ }
+ else if (strcmp(reg->name, "XSCALE_RX") == 0)
+ {
+ buf_set_u32(xscale->reg_cache->reg_list[XSCALE_RX].value, 0, 32, value);
+ return xscale_write_rx(arch_info->target);
+ }
+ else if (strcmp(reg->name, "XSCALE_TX") == 0)
+ {
+ /* can't write to TX register (debug-handler -> host) */
+ return ERROR_OK;
+ }
+ else if (strcmp(reg->name, "XSCALE_TXRXCTRL") == 0)
+ {
+ /* can't (explicitly) write to TXRXCTRL register */
+ return ERROR_OK;
+ }
+ else /* Other DBG registers have to be transfered by the debug handler */
+ {
+ /* send CP write request (command 0x41) */
+ xscale_send_u32(target, 0x41);
+
+ /* send CP register number */
+ xscale_send_u32(target, arch_info->dbg_handler_number);
+
+ /* send CP register value */
+ xscale_send_u32(target, value);
+ buf_set_u32(reg->value, 0, 32, value);
+ }
+
+ return ERROR_OK;
+}
+
+/* convenience wrapper to access XScale specific registers */
+int xscale_set_reg_u32(reg_t *reg, u32 value)
+{
+ u8 buf[4];
+
+ buf_set_u32(buf, 0, 32, value);
+
+ return xscale_set_reg(reg, buf);
+}
+
+int xscale_write_dcsr_sw(target_t *target, u32 value)
+{
+ /* get pointers to arch-specific information */
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ reg_t *dcsr = &xscale->reg_cache->reg_list[XSCALE_DCSR];
+ xscale_reg_t *dcsr_arch_info = dcsr->arch_info;
+
+ /* send CP write request (command 0x41) */
+ xscale_send_u32(target, 0x41);
+
+ /* send CP register number */
+ xscale_send_u32(target, dcsr_arch_info->dbg_handler_number);
+
+ /* send CP register value */
+ xscale_send_u32(target, value);
+ buf_set_u32(dcsr->value, 0, 32, value);
+
+ return ERROR_OK;
+}
+
+int xscale_read_trace(target_t *target)
+{
+ /* get pointers to arch-specific information */
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ xscale_trace_data_t **trace_data_p;
+
+ /* 258 words from debug handler
+ * 256 trace buffer entries
+ * 2 checkpoint addresses
+ */
+ u32 trace_buffer[258];
+ int is_address[256];
+ int i, j;
+
+ if (target->state != TARGET_HALTED)
+ {
+ WARNING("target must be stopped to read trace data");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ /* send read trace buffer command (command 0x61) */
+ xscale_send_u32(target, 0x61);
+
+ /* receive trace buffer content */
+ xscale_receive(target, trace_buffer, 258);
+
+ /* parse buffer backwards to identify address entries */
+ for (i = 255; i >= 0; i--)
+ {
+ is_address[i] = 0;
+ if (((trace_buffer[i] & 0xf0) == 0x90) ||
+ ((trace_buffer[i] & 0xf0) == 0xd0))
+ {
+ if (i >= 3)
+ is_address[--i] = 1;
+ if (i >= 2)
+ is_address[--i] = 1;
+ if (i >= 1)
+ is_address[--i] = 1;
+ if (i >= 0)
+ is_address[--i] = 1;
+ }
+ }
+
+
+ /* search first non-zero entry */
+ for (j = 0; (j < 256) && (trace_buffer[j] == 0) && (!is_address[j]); j++)
+ ;
+
+ if (j == 256)
+ {
+ DEBUG("no trace data collected");
+ return ERROR_XSCALE_NO_TRACE_DATA;
+ }
+
+ for (trace_data_p = &xscale->trace.data; *trace_data_p; trace_data_p = &(*trace_data_p)->next)
+ ;
+
+ *trace_data_p = malloc(sizeof(xscale_trace_data_t));
+ (*trace_data_p)->next = NULL;
+ (*trace_data_p)->chkpt0 = trace_buffer[256];
+ (*trace_data_p)->chkpt1 = trace_buffer[257];
+ (*trace_data_p)->last_instruction = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
+ (*trace_data_p)->entries = malloc(sizeof(xscale_trace_entry_t) * (256 - j));
+ (*trace_data_p)->depth = 256 - j;
+
+ for (i = j; i < 256; i++)
+ {
+ (*trace_data_p)->entries[i - j].data = trace_buffer[i];
+ if (is_address[i])
+ (*trace_data_p)->entries[i - j].type = XSCALE_TRACE_ADDRESS;
+ else
+ (*trace_data_p)->entries[i - j].type = XSCALE_TRACE_MESSAGE;
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_read_instruction(target_t *target, arm_instruction_t *instruction)
+{
+ /* get pointers to arch-specific information */
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ int i;
+ int section = -1;
+ u32 size_read;
+ u32 opcode;
+ int retval;
+
+ if (!xscale->trace.image)
+ return ERROR_TRACE_IMAGE_UNAVAILABLE;
+
+ /* search for the section the current instruction belongs to */
+ for (i = 0; i < xscale->trace.image->num_sections; i++)
+ {
+ if ((xscale->trace.image->sections[i].base_address <= xscale->trace.current_pc) &&
+ (xscale->trace.image->sections[i].base_address + xscale->trace.image->sections[i].size > xscale->trace.current_pc))
+ {
+ section = i;
+ break;
+ }
+ }
+
+ if (section == -1)
+ {
+ /* current instruction couldn't be found in the image */
+ return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
+ }
+
+ if (xscale->trace.core_state == ARMV4_5_STATE_ARM)
+ {
+ u8 buf[4];
+ if ((retval = image_read_section(xscale->trace.image, section,
+ xscale->trace.current_pc - xscale->trace.image->sections[section].base_address,
+ 4, buf, &size_read)) != ERROR_OK)
+ {
+ ERROR("error while reading instruction: %i", retval);
+ return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
+ }
+ opcode = target_buffer_get_u32(target, buf);
+ arm_evaluate_opcode(opcode, xscale->trace.current_pc, instruction);
+ }
+ else if (xscale->trace.core_state == ARMV4_5_STATE_THUMB)
+ {
+ u8 buf[2];
+ if ((retval = image_read_section(xscale->trace.image, section,
+ xscale->trace.current_pc - xscale->trace.image->sections[section].base_address,
+ 2, buf, &size_read)) != ERROR_OK)
+ {
+ ERROR("error while reading instruction: %i", retval);
+ return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
+ }
+ opcode = target_buffer_get_u16(target, buf);
+ thumb_evaluate_opcode(opcode, xscale->trace.current_pc, instruction);
+ }
+ else
+ {
+ ERROR("BUG: unknown core state encountered");
+ exit(-1);
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_branch_address(xscale_trace_data_t *trace_data, int i, u32 *target)
+{
+ /* if there are less than four entries prior to the indirect branch message
+ * we can't extract the address */
+ if (i < 4)
+ {
+ return -1;
+ }
+
+ *target = (trace_data->entries[i-1].data) | (trace_data->entries[i-2].data << 8) |
+ (trace_data->entries[i-3].data << 16) | (trace_data->entries[i-4].data << 24);
+
+ return 0;
+}
+
+int xscale_analyze_trace(target_t *target, command_context_t *cmd_ctx)
+{
+ /* get pointers to arch-specific information */
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+ int next_pc_ok = 0;
+ u32 next_pc = 0x0;
+ xscale_trace_data_t *trace_data = xscale->trace.data;
+ int retval;
+
+ while (trace_data)
+ {
+ int i, chkpt;
+ int rollover;
+ int branch;
+ int exception;
+ xscale->trace.core_state = ARMV4_5_STATE_ARM;
+
+ chkpt = 0;
+ rollover = 0;
+
+ for (i = 0; i < trace_data->depth; i++)
+ {
+ next_pc_ok = 0;
+ branch = 0;
+ exception = 0;
+
+ if (trace_data->entries[i].type == XSCALE_TRACE_ADDRESS)
+ continue;
+
+ switch ((trace_data->entries[i].data & 0xf0) >> 4)
+ {
+ case 0: /* Exceptions */
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ case 6:
+ case 7:
+ exception = (trace_data->entries[i].data & 0x70) >> 4;
+ next_pc_ok = 1;
+ next_pc = (trace_data->entries[i].data & 0xf0) >> 2;
+ command_print(cmd_ctx, "--- exception %i ---", (trace_data->entries[i].data & 0xf0) >> 4);
+ break;
+ case 8: /* Direct Branch */
+ branch = 1;
+ break;
+ case 9: /* Indirect Branch */
+ branch = 1;
+ if (xscale_branch_address(trace_data, i, &next_pc) == 0)
+ {
+ next_pc_ok = 1;
+ }
+ break;
+ case 13: /* Checkpointed Indirect Branch */
+ if (xscale_branch_address(trace_data, i, &next_pc) == 0)
+ {
+ next_pc_ok = 1;
+ if (((chkpt == 0) && (next_pc != trace_data->chkpt0))
+ || ((chkpt == 1) && (next_pc != trace_data->chkpt1)))
+ WARNING("checkpointed indirect branch target address doesn't match checkpoint");
+ }
+ /* explicit fall-through */
+ case 12: /* Checkpointed Direct Branch */
+ branch = 1;
+ if (chkpt == 0)
+ {
+ next_pc_ok = 1;
+ next_pc = trace_data->chkpt0;
+ chkpt++;
+ }
+ else if (chkpt == 1)
+ {
+ next_pc_ok = 1;
+ next_pc = trace_data->chkpt0;
+ chkpt++;
+ }
+ else
+ {
+ WARNING("more than two checkpointed branches encountered");
+ }
+ break;
+ case 15: /* Roll-over */
+ rollover++;
+ continue;
+ default: /* Reserved */
+ command_print(cmd_ctx, "--- reserved trace message ---");
+ ERROR("BUG: trace message %i is reserved", (trace_data->entries[i].data & 0xf0) >> 4);
+ return ERROR_OK;
+ }
+
+ if (xscale->trace.pc_ok)
+ {
+ int executed = (trace_data->entries[i].data & 0xf) + rollover * 16;
+ arm_instruction_t instruction;
+
+ if ((exception == 6) || (exception == 7))
+ {
+ /* IRQ or FIQ exception, no instruction executed */
+ executed -= 1;
+ }
+
+ while (executed-- >= 0)
+ {
+ if ((retval = xscale_read_instruction(target, &instruction)) != ERROR_OK)
+ {
+ /* can't continue tracing with no image available */
+ if (retval == ERROR_TRACE_IMAGE_UNAVAILABLE)
+ {
+ return retval;
+ }
+ else if (retval == ERROR_TRACE_INSTRUCTION_UNAVAILABLE)
+ {
+ /* TODO: handle incomplete images */
+ }
+ }
+
+ /* a precise abort on a load to the PC is included in the incremental
+ * word count, other instructions causing data aborts are not included
+ */
+ if ((executed == 0) && (exception == 4)
+ && ((instruction.type >= ARM_LDR) && (instruction.type <= ARM_LDM)))
+ {
+ if ((instruction.type == ARM_LDM)
+ && ((instruction.info.load_store_multiple.register_list & 0x8000) == 0))
+ {
+ executed--;
+ }
+ else if (((instruction.type >= ARM_LDR) && (instruction.type <= ARM_LDRSH))
+ && (instruction.info.load_store.Rd != 15))
+ {
+ executed--;
+ }
+ }
+
+ /* only the last instruction executed
+ * (the one that caused the control flow change)
+ * could be a taken branch
+ */
+ if (((executed == -1) && (branch == 1)) &&
+ (((instruction.type == ARM_B) ||
+ (instruction.type == ARM_BL) ||
+ (instruction.type == ARM_BLX)) &&
+ (instruction.info.b_bl_bx_blx.target_address != -1)))
+ {
+ xscale->trace.current_pc = instruction.info.b_bl_bx_blx.target_address;
+ }
+ else
+ {
+ xscale->trace.current_pc += (xscale->trace.core_state == ARMV4_5_STATE_ARM) ? 4 : 2;
+ }
+ command_print(cmd_ctx, "%s", instruction.text);
+ }
+
+ rollover = 0;
+ }
+
+ if (next_pc_ok)
+ {
+ xscale->trace.current_pc = next_pc;
+ xscale->trace.pc_ok = 1;
+ }
+ }
+
+ for (; xscale->trace.current_pc < trace_data->last_instruction; xscale->trace.current_pc += (xscale->trace.core_state == ARMV4_5_STATE_ARM) ? 4 : 2)
+ {
+ arm_instruction_t instruction;
+ if ((retval = xscale_read_instruction(target, &instruction)) != ERROR_OK)
+ {
+ /* can't continue tracing with no image available */
+ if (retval == ERROR_TRACE_IMAGE_UNAVAILABLE)
+ {
+ return retval;
+ }
+ else if (retval == ERROR_TRACE_INSTRUCTION_UNAVAILABLE)
+ {
+ /* TODO: handle incomplete images */
+ }
+ }
+ command_print(cmd_ctx, "%s", instruction.text);
+ }
+
+ trace_data = trace_data->next;
+ }
+
+ return ERROR_OK;
+}
+
+void xscale_build_reg_cache(target_t *target)
+{
+ /* get pointers to arch-specific information */
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
+ xscale_reg_t *arch_info = malloc(sizeof(xscale_reg_arch_info));
+ int i;
+ int num_regs = sizeof(xscale_reg_arch_info) / sizeof(xscale_reg_t);
+
+ (*cache_p) = armv4_5_build_reg_cache(target, armv4_5);
+ armv4_5->core_cache = (*cache_p);
+
+ /* register a register arch-type for XScale dbg registers only once */
+ if (xscale_reg_arch_type == -1)
+ xscale_reg_arch_type = register_reg_arch_type(xscale_get_reg, xscale_set_reg);
+
+ (*cache_p)->next = malloc(sizeof(reg_cache_t));
+ cache_p = &(*cache_p)->next;
+
+ /* fill in values for the xscale reg cache */
+ (*cache_p)->name = "XScale registers";
+ (*cache_p)->next = NULL;
+ (*cache_p)->reg_list = malloc(num_regs * sizeof(reg_t));
+ (*cache_p)->num_regs = num_regs;
+
+ for (i = 0; i < num_regs; i++)
+ {
+ (*cache_p)->reg_list[i].name = xscale_reg_list[i];
+ (*cache_p)->reg_list[i].value = calloc(4, 1);
+ (*cache_p)->reg_list[i].dirty = 0;
+ (*cache_p)->reg_list[i].valid = 0;
+ (*cache_p)->reg_list[i].size = 32;
+ (*cache_p)->reg_list[i].bitfield_desc = NULL;
+ (*cache_p)->reg_list[i].num_bitfields = 0;
+ (*cache_p)->reg_list[i].arch_info = &arch_info[i];
+ (*cache_p)->reg_list[i].arch_type = xscale_reg_arch_type;
+ arch_info[i] = xscale_reg_arch_info[i];
+ arch_info[i].target = target;
+ }
+
+ xscale->reg_cache = (*cache_p);
+}
+
+int xscale_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
+{
+ if (startup_mode != DAEMON_RESET)
+ {
+ ERROR("XScale target requires a reset");
+ ERROR("Reset target to enable debug");
+ }
+
+ /* assert TRST once during startup */
+ jtag_add_reset(1, 0);
+ jtag_add_sleep(5000);
+ jtag_add_reset(0, 0);
+ jtag_execute_queue();
+
+ return ERROR_OK;
+}
+
+int xscale_quit()
+{
+
+ return ERROR_OK;
+}
+
+int xscale_init_arch_info(target_t *target, xscale_common_t *xscale, int chain_pos, char *variant)
+{
+ armv4_5_common_t *armv4_5;
+ u32 high_reset_branch, low_reset_branch;
+ int i;
+
+ armv4_5 = &xscale->armv4_5_common;
+
+ /* store architecture specfic data (none so far) */
+ xscale->arch_info = NULL;
+ xscale->common_magic = XSCALE_COMMON_MAGIC;
+
+ /* remember the variant (PXA25x, PXA27x, IXP42x, ...) */
+ xscale->variant = strdup(variant);
+
+ /* prepare JTAG information for the new target */
+ xscale->jtag_info.chain_pos = chain_pos;
+ jtag_register_event_callback(xscale_jtag_callback, target);
+
+ xscale->jtag_info.dbgrx = 0x02;
+ xscale->jtag_info.dbgtx = 0x10;
+ xscale->jtag_info.dcsr = 0x09;
+ xscale->jtag_info.ldic = 0x07;
+
+ if ((strcmp(xscale->variant, "pxa250") == 0) ||
+ (strcmp(xscale->variant, "pxa255") == 0) ||
+ (strcmp(xscale->variant, "pxa26x") == 0))
+ {
+ xscale->jtag_info.ir_length = 5;
+ }
+ else if ((strcmp(xscale->variant, "pxa27x") == 0) ||
+ (strcmp(xscale->variant, "ixp42x") == 0) ||
+ (strcmp(xscale->variant, "ixp45x") == 0) ||
+ (strcmp(xscale->variant, "ixp46x") == 0))
+ {
+ xscale->jtag_info.ir_length = 7;
+ }
+
+ /* the debug handler isn't installed (and thus not running) at this time */
+ xscale->handler_installed = 0;
+ xscale->handler_running = 0;
+ xscale->handler_address = 0xfe000800;
+
+ /* clear the vectors we keep locally for reference */
+ memset(xscale->low_vectors, 0, sizeof(xscale->low_vectors));
+ memset(xscale->high_vectors, 0, sizeof(xscale->high_vectors));
+
+ /* no user-specified vectors have been configured yet */
+ xscale->static_low_vectors_set = 0x0;
+ xscale->static_high_vectors_set = 0x0;
+
+ /* calculate branches to debug handler */
+ low_reset_branch = (xscale->handler_address + 0x20 - 0x0 - 0x8) >> 2;
+ high_reset_branch = (xscale->handler_address + 0x20 - 0xffff0000 - 0x8) >> 2;
+
+ xscale->low_vectors[0] = ARMV4_5_B((low_reset_branch & 0xffffff), 0);
+ xscale->high_vectors[0] = ARMV4_5_B((high_reset_branch & 0xffffff), 0);
+
+ for (i = 1; i <= 7; i++)
+ {
+ xscale->low_vectors[i] = ARMV4_5_B(0xfffffe, 0);
+ xscale->high_vectors[i] = ARMV4_5_B(0xfffffe, 0);
+ }
+
+ /* 64kB aligned region used for DCache cleaning */
+ xscale->cache_clean_address = 0xfffe0000;
+
+ xscale->hold_rst = 0;
+ xscale->external_debug_break = 0;
+
+ xscale->force_hw_bkpts = 1;
+
+ xscale->ibcr_available = 2;
+ xscale->ibcr0_used = 0;
+ xscale->ibcr1_used = 0;
+
+ xscale->dbr_available = 2;
+ xscale->dbr0_used = 0;
+ xscale->dbr1_used = 0;
+
+ xscale->arm_bkpt = ARMV5_BKPT(0x0);
+ xscale->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
+
+ xscale->vector_catch = 0x1;
+
+ xscale->trace.capture_status = TRACE_IDLE;
+ xscale->trace.data = NULL;
+ xscale->trace.image = NULL;
+ xscale->trace.buffer_enabled = 0;
+ xscale->trace.buffer_fill = 0;
+
+ /* prepare ARMv4/5 specific information */
+ armv4_5->arch_info = xscale;
+ armv4_5->read_core_reg = xscale_read_core_reg;
+ armv4_5->write_core_reg = xscale_write_core_reg;
+ armv4_5->full_context = xscale_full_context;
+
+ armv4_5_init_arch_info(target, armv4_5);
+
+ xscale->armv4_5_mmu.armv4_5_cache.ctype = -1;
+ xscale->armv4_5_mmu.get_ttb = xscale_get_ttb;
+ xscale->armv4_5_mmu.read_memory = xscale_read_memory;
+ xscale->armv4_5_mmu.write_memory = xscale_write_memory;
+ xscale->armv4_5_mmu.disable_mmu_caches = xscale_disable_mmu_caches;
+ xscale->armv4_5_mmu.enable_mmu_caches = xscale_enable_mmu_caches;
+ xscale->armv4_5_mmu.has_tiny_pages = 1;
+ xscale->armv4_5_mmu.mmu_enabled = 0;
+
+ xscale->fast_memory_access = 0;
+
+ return ERROR_OK;
+}
+
+/* target xscale <endianess> <startup_mode> <chain_pos> <variant> */
+int xscale_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
+{
+ int chain_pos;
+ char *variant = NULL;
+ xscale_common_t *xscale = malloc(sizeof(xscale_common_t));
+
+ if (argc < 5)
+ {
+ ERROR("'target xscale' requires four arguments: <endianess> <startup_mode> <chain_pos> <variant>");
+ return ERROR_OK;
+ }
+
+ chain_pos = strtoul(args[3], NULL, 0);
+
+ variant = args[4];
+
+ xscale_init_arch_info(target, xscale, chain_pos, variant);
+ xscale_build_reg_cache(target);
+
+ return ERROR_OK;
+}
+
+int xscale_handle_debug_handler_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target = NULL;
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+
+ u32 handler_address;
+
+ if (argc < 2)
+ {
+ ERROR("'xscale debug_handler <target#> <address>' command takes two required operands");
+ return ERROR_OK;
+ }
+
+ if ((target = get_target_by_num(strtoul(args[0], NULL, 0))) == NULL)
+ {
+ ERROR("no target '%s' configured", args[0]);
+ return ERROR_OK;
+ }
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ handler_address = strtoul(args[1], NULL, 0);
+
+ if (((handler_address >= 0x800) && (handler_address <= 0x1fef800)) ||
+ ((handler_address >= 0xfe000800) && (handler_address <= 0xfffff800)))
+ {
+ xscale->handler_address = handler_address;
+ }
+ else
+ {
+ ERROR("xscale debug_handler <address> must be between 0x800 and 0x1fef800 or between 0xfe000800 and 0xfffff800");
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_handle_cache_clean_address_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target = NULL;
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+
+ u32 cache_clean_address;
+
+ if (argc < 2)
+ {
+ ERROR("'xscale cache_clean_address <target#> <address>' command takes two required operands");
+ return ERROR_OK;
+ }
+
+ if ((target = get_target_by_num(strtoul(args[0], NULL, 0))) == NULL)
+ {
+ ERROR("no target '%s' configured", args[0]);
+ return ERROR_OK;
+ }
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ cache_clean_address = strtoul(args[1], NULL, 0);
+
+ if (cache_clean_address & 0xffff)
+ {
+ ERROR("xscale cache_clean_address <address> must be 64kb aligned");
+ }
+ else
+ {
+ xscale->cache_clean_address = cache_clean_address;
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target = get_current_target(cmd_ctx);
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ return armv4_5_handle_cache_info_command(cmd_ctx, &xscale->armv4_5_mmu.armv4_5_cache);
+}
+
+static int xscale_virt2phys(struct target_s *target, u32 virtual, u32 *physical)
+{
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+ int retval;
+ int type;
+ u32 cb;
+ int domain;
+ u32 ap;
+
+ if ((retval = xscale_get_arch_pointers(target, &armv4_5, &xscale)) != ERROR_OK)
+ {
+ return retval;
+ }
+ u32 ret = armv4_5_mmu_translate_va(target, &xscale->armv4_5_mmu, virtual, &type, &cb, &domain, &ap);
+ if (type == -1)
+ {
+ return ret;
+ }
+
+ *physical = ret;
+ return ERROR_OK;
+}
+
+static int xscale_mmu(struct target_s *target, int *enabled)
+{
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ xscale_common_t *xscale = armv4_5->arch_info;
+
+ if (target->state != TARGET_HALTED)
+ {
+ ERROR("Target not halted");
+ return ERROR_TARGET_INVALID;
+ }
+
+ *enabled = xscale->armv4_5_mmu.mmu_enabled;
+ return ERROR_OK;
+}
+
+int xscale_handle_mmu_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target = get_current_target(cmd_ctx);
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ if (target->state != TARGET_HALTED)
+ {
+ command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
+ return ERROR_OK;
+ }
+
+ if (argc >= 1)
+ {
+ if (strcmp("enable", args[0]) == 0)
+ {
+ xscale_enable_mmu_caches(target, 1, 0, 0);
+ xscale->armv4_5_mmu.mmu_enabled = 1;
+ }
+ else if (strcmp("disable", args[0]) == 0)
+ {
+ xscale_disable_mmu_caches(target, 1, 0, 0);
+ xscale->armv4_5_mmu.mmu_enabled = 0;
+ }
+ }
+
+ command_print(cmd_ctx, "mmu %s", (xscale->armv4_5_mmu.mmu_enabled) ? "enabled" : "disabled");
+
+ return ERROR_OK;
+}
+
+int xscale_handle_idcache_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target = get_current_target(cmd_ctx);
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+ int icache = 0, dcache = 0;
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ if (target->state != TARGET_HALTED)
+ {
+ command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
+ return ERROR_OK;
+ }
+
+ if (strcmp(cmd, "icache") == 0)
+ icache = 1;
+ else if (strcmp(cmd, "dcache") == 0)
+ dcache = 1;
+
+ if (argc >= 1)
+ {
+ if (strcmp("enable", args[0]) == 0)
+ {
+ xscale_enable_mmu_caches(target, 0, dcache, icache);
+
+ if (icache)
+ xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 1;
+ else if (dcache)
+ xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 1;
+ }
+ else if (strcmp("disable", args[0]) == 0)
+ {
+ xscale_disable_mmu_caches(target, 0, dcache, icache);
+
+ if (icache)
+ xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
+ else if (dcache)
+ xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
+ }
+ }
+
+ if (icache)
+ command_print(cmd_ctx, "icache %s", (xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled) ? "enabled" : "disabled");
+
+ if (dcache)
+ command_print(cmd_ctx, "dcache %s", (xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled) ? "enabled" : "disabled");
+
+ return ERROR_OK;
+}
+
+int xscale_handle_vector_catch_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target = get_current_target(cmd_ctx);
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ if (argc < 1)
+ {
+ command_print(cmd_ctx, "usage: xscale vector_catch [mask]");
+ }
+ else
+ {
+ xscale->vector_catch = strtoul(args[0], NULL, 0);
+ buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 8, xscale->vector_catch);
+ xscale_write_dcsr(target, -1, -1);
+ }
+
+ command_print(cmd_ctx, "vector catch mask: 0x%2.2x", xscale->vector_catch);
+
+ return ERROR_OK;
+}
+
+int xscale_handle_force_hw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target = get_current_target(cmd_ctx);
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ if ((argc >= 1) && (strcmp("enable", args[0]) == 0))
+ {
+ xscale->force_hw_bkpts = 1;
+ }
+ else if ((argc >= 1) && (strcmp("disable", args[0]) == 0))
+ {
+ xscale->force_hw_bkpts = 0;
+ }
+ else
+ {
+ command_print(cmd_ctx, "usage: xscale force_hw_bkpts <enable|disable>");
+ }
+
+ command_print(cmd_ctx, "force hardware breakpoints %s", (xscale->force_hw_bkpts) ? "enabled" : "disabled");
+
+ return ERROR_OK;
+}
+
+int xscale_handle_trace_buffer_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target = get_current_target(cmd_ctx);
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+ u32 dcsr_value;
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ if (target->state != TARGET_HALTED)
+ {
+ command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
+ return ERROR_OK;
+ }
+
+ if ((argc >= 1) && (strcmp("enable", args[0]) == 0))
+ {
+ xscale_trace_data_t *td, *next_td;
+ xscale->trace.buffer_enabled = 1;
+
+ /* free old trace data */
+ td = xscale->trace.data;
+ while (td)
+ {
+ next_td = td->next;
+
+ if (td->entries)
+ free(td->entries);
+ free(td);
+ td = next_td;
+ }
+ xscale->trace.data = NULL;
+ }
+ else if ((argc >= 1) && (strcmp("disable", args[0]) == 0))
+ {
+ xscale->trace.buffer_enabled = 0;
+ }
+
+ if ((argc >= 2) && (strcmp("fill", args[1]) == 0))
+ {
+ if (argc >= 3)
+ xscale->trace.buffer_fill = strtoul(args[2], NULL, 0);
+ else
+ xscale->trace.buffer_fill = 1;
+ }
+ else if ((argc >= 2) && (strcmp("wrap", args[1]) == 0))
+ {
+ xscale->trace.buffer_fill = -1;
+ }
+
+ if (xscale->trace.buffer_enabled)
+ {
+ /* if we enable the trace buffer in fill-once
+ * mode we know the address of the first instruction */
+ xscale->trace.pc_ok = 1;
+ xscale->trace.current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
+ }
+ else
+ {
+ /* otherwise the address is unknown, and we have no known good PC */
+ xscale->trace.pc_ok = 0;
+ }
+
+ command_print(cmd_ctx, "trace buffer %s (%s)",
+ (xscale->trace.buffer_enabled) ? "enabled" : "disabled",
+ (xscale->trace.buffer_fill > 0) ? "fill" : "wrap");
+
+ dcsr_value = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 0, 32);
+ if (xscale->trace.buffer_fill >= 0)
+ xscale_write_dcsr_sw(target, (dcsr_value & 0xfffffffc) | 2);
+ else
+ xscale_write_dcsr_sw(target, dcsr_value & 0xfffffffc);
+
+ return ERROR_OK;
+}
+
+int xscale_handle_trace_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target;
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+
+ if (argc < 1)
+ {
+ command_print(cmd_ctx, "usage: xscale trace_image <file> [base address] [type]");
+ return ERROR_OK;
+ }
+
+ target = get_current_target(cmd_ctx);
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ if (xscale->trace.image)
+ {
+ image_close(xscale->trace.image);
+ free(xscale->trace.image);
+ command_print(cmd_ctx, "previously loaded image found and closed");
+ }
+
+ xscale->trace.image = malloc(sizeof(image_t));
+ xscale->trace.image->base_address_set = 0;
+ xscale->trace.image->start_address_set = 0;
+
+ /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
+ if (argc >= 2)
+ {
+ xscale->trace.image->base_address_set = 1;
+ xscale->trace.image->base_address = strtoul(args[1], NULL, 0);
+ }
+ else
+ {
+ xscale->trace.image->base_address_set = 0;
+ }
+
+ if (image_open(xscale->trace.image, args[0], (argc >= 3) ? args[2] : NULL) != ERROR_OK)
+ {
+ command_print(cmd_ctx, "image opening error: %s", xscale->trace.image->error_str);
+ free(xscale->trace.image);
+ xscale->trace.image = NULL;
+ return ERROR_OK;
+ }
+
+ return ERROR_OK;
+}
+
+int xscale_handle_dump_trace_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target = get_current_target(cmd_ctx);
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+ xscale_trace_data_t *trace_data;
+ fileio_t file;
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ if (target->state != TARGET_HALTED)
+ {
+ command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
+ return ERROR_OK;
+ }
+
+ if (argc < 1)
+ {
+ command_print(cmd_ctx, "usage: xscale dump_trace <file>");
+ return ERROR_OK;
+ }
+
+ trace_data = xscale->trace.data;
+
+ if (!trace_data)
+ {
+ command_print(cmd_ctx, "no trace data collected");
+ return ERROR_OK;
+ }
+
+ if (fileio_open(&file, args[0], FILEIO_WRITE, FILEIO_BINARY) != ERROR_OK)
+ {
+ command_print(cmd_ctx, "file open error: %s", file.error_str);
+ return ERROR_OK;
+ }
+
+ while (trace_data)
+ {
+ int i;
+
+ fileio_write_u32(&file, trace_data->chkpt0);
+ fileio_write_u32(&file, trace_data->chkpt1);
+ fileio_write_u32(&file, trace_data->last_instruction);
+ fileio_write_u32(&file, trace_data->depth);
+
+ for (i = 0; i < trace_data->depth; i++)
+ fileio_write_u32(&file, trace_data->entries[i].data | ((trace_data->entries[i].type & 0xffff) << 16));
+
+ trace_data = trace_data->next;
+ }
+
+ fileio_close(&file);
+
+ return ERROR_OK;
+}
+
+int xscale_handle_analyze_trace_buffer_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target = get_current_target(cmd_ctx);
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ xscale_analyze_trace(target, cmd_ctx);
+
+ return ERROR_OK;
+}
+
+int xscale_handle_cp15(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target = get_current_target(cmd_ctx);
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ if (target->state != TARGET_HALTED)
+ {
+ command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
+ return ERROR_OK;
+ }
+ u32 reg_no = 0;
+ reg_t *reg = NULL;
+ if(argc > 0)
+ {
+ reg_no = strtoul(args[0], NULL, 0);
+ /*translate from xscale cp15 register no to openocd register*/
+ switch(reg_no)
+ {
+ case 0:
+ reg_no = XSCALE_MAINID;
+ break;
+ case 1:
+ reg_no = XSCALE_CTRL;
+ break;
+ case 2:
+ reg_no = XSCALE_TTB;
+ break;
+ case 3:
+ reg_no = XSCALE_DAC;
+ break;
+ case 5:
+ reg_no = XSCALE_FSR;
+ break;
+ case 6:
+ reg_no = XSCALE_FAR;
+ break;
+ case 13:
+ reg_no = XSCALE_PID;
+ break;
+ case 15:
+ reg_no = XSCALE_CPACCESS;
+ break;
+ default:
+ command_print(cmd_ctx, "invalid register number");
+ return ERROR_INVALID_ARGUMENTS;
+ }
+ reg = &xscale->reg_cache->reg_list[reg_no];
+
+ }
+ if(argc == 1)
+ {
+ u32 value;
+
+ /* read cp15 control register */
+ xscale_get_reg(reg);
+ value = buf_get_u32(reg->value, 0, 32);
+ command_print(cmd_ctx, "%s (/%i): 0x%x", reg->name, reg->size, value);
+ }
+ else if(argc == 2)
+ {
+
+ u32 value = strtoul(args[1], NULL, 0);
+
+ /* send CP write request (command 0x41) */
+ xscale_send_u32(target, 0x41);
+
+ /* send CP register number */
+ xscale_send_u32(target, reg_no);
+
+ /* send CP register value */
+ xscale_send_u32(target, value);
+
+ /* execute cpwait to ensure outstanding operations complete */
+ xscale_send_u32(target, 0x53);
+ }
+ else
+ {
+ command_print(cmd_ctx, "usage: cp15 [register]<, [value]>");
+ }
+
+ return ERROR_OK;
+}
+
+int handle_xscale_fast_memory_access_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ target_t *target = get_current_target(cmd_ctx);
+ armv4_5_common_t *armv4_5;
+ xscale_common_t *xscale;
+
+ if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
+ {
+ return ERROR_OK;
+ }
+
+ if (argc == 1)
+ {
+ if (strcmp("enable", args[0]) == 0)
+ {
+ xscale->fast_memory_access = 1;
+ }
+ else if (strcmp("disable", args[0]) == 0)
+ {
+ xscale->fast_memory_access = 0;
+ }
+ else
+ {
+ return ERROR_COMMAND_SYNTAX_ERROR;
+ }
+ } else if (argc!=0)
+ {
+ return ERROR_COMMAND_SYNTAX_ERROR;
+ }
+
+ command_print(cmd_ctx, "fast memory access is %s", (xscale->fast_memory_access) ? "enabled" : "disabled");
+
+ return ERROR_OK;
+}
+
+int xscale_register_commands(struct command_context_s *cmd_ctx)
+{
+ command_t *xscale_cmd;
+
+ xscale_cmd = register_command(cmd_ctx, NULL, "xscale", NULL, COMMAND_ANY, "xscale specific commands");
+
+ register_command(cmd_ctx, xscale_cmd, "debug_handler", xscale_handle_debug_handler_command, COMMAND_ANY, "'xscale debug_handler <target#> <address>' command takes two required operands");
+ register_command(cmd_ctx, xscale_cmd, "cache_clean_address", xscale_handle_cache_clean_address_command, COMMAND_ANY, NULL);
+
+ register_command(cmd_ctx, xscale_cmd, "cache_info", xscale_handle_cache_info_command, COMMAND_EXEC, NULL);
+ register_command(cmd_ctx, xscale_cmd, "mmu", xscale_handle_mmu_command, COMMAND_EXEC, "['enable'|'disable'] the MMU");
+ register_command(cmd_ctx, xscale_cmd, "icache", xscale_handle_idcache_command, COMMAND_EXEC, "['enable'|'disable'] the ICache");
+ register_command(cmd_ctx, xscale_cmd, "dcache", xscale_handle_idcache_command, COMMAND_EXEC, "['enable'|'disable'] the DCache");
+
+ register_command(cmd_ctx, xscale_cmd, "vector_catch", xscale_handle_idcache_command, COMMAND_EXEC, "<mask> of vectors that should be catched");
+
+ register_command(cmd_ctx, xscale_cmd, "trace_buffer", xscale_handle_trace_buffer_command, COMMAND_EXEC, "<enable|disable> ['fill' [n]|'wrap']");
+
+ register_command(cmd_ctx, xscale_cmd, "dump_trace", xscale_handle_dump_trace_command, COMMAND_EXEC, "dump content of trace buffer to <file>");
+ register_command(cmd_ctx, xscale_cmd, "analyze_trace", xscale_handle_analyze_trace_buffer_command, COMMAND_EXEC, "analyze content of trace buffer");
+ register_command(cmd_ctx, xscale_cmd, "trace_image", xscale_handle_trace_image_command,
+ COMMAND_EXEC, "load image from <file> [base address]");
+
+ register_command(cmd_ctx, xscale_cmd, "cp15", xscale_handle_cp15, COMMAND_EXEC, "access coproc 15 <register> [value]");
+ register_command(cmd_ctx, xscale_cmd, "fast_memory_access", handle_xscale_fast_memory_access_command,
+ COMMAND_ANY, "use fast memory accesses instead of slower but potentially unsafe slow accesses <enable|disable>");
+
+ armv4_5_register_commands(cmd_ctx);
+
+ return ERROR_OK;
+}
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