From 8b4e882a1630d63bbc9840fa3f968e36b6ac3702 Mon Sep 17 00:00:00 2001 From: drath Date: Fri, 2 Jun 2006 10:36:31 +0000 Subject: - prepare OpenOCD for branching, created ./trunk/ git-svn-id: svn://svn.berlios.de/openocd/trunk@64 b42882b7-edfa-0310-969c-e2dbd0fdcd60 --- src/target/arm7tdmi.c | 780 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 780 insertions(+) create mode 100644 src/target/arm7tdmi.c (limited to 'src/target/arm7tdmi.c') diff --git a/src/target/arm7tdmi.c b/src/target/arm7tdmi.c new file mode 100644 index 0000000..c207947 --- /dev/null +++ b/src/target/arm7tdmi.c @@ -0,0 +1,780 @@ +/*************************************************************************** + * Copyright (C) 2005 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. * + ***************************************************************************/ +#include "config.h" + +#include "arm7tdmi.h" + +#include "arm7_9_common.h" +#include "register.h" +#include "target.h" +#include "armv4_5.h" +#include "embeddedice.h" +#include "etm.h" +#include "log.h" +#include "jtag.h" +#include "arm_jtag.h" + +#include +#include + +#if 0 +#define _DEBUG_INSTRUCTION_EXECUTION_ +#endif + +/* cli handling */ +int arm7tdmi_register_commands(struct command_context_s *cmd_ctx); + +/* forward declarations */ +int arm7tdmi_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target); +int arm7tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target); +int arm7tdmi_quit(); + +/* target function declarations */ +enum target_state arm7tdmi_poll(struct target_s *target); +int arm7tdmi_halt(target_t *target); +int arm7tdmi_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer); + +target_type_t arm7tdmi_target = +{ + .name = "arm7tdmi", + + .poll = arm7_9_poll, + .arch_state = armv4_5_arch_state, + + .halt = arm7_9_halt, + .resume = arm7_9_resume, + .step = arm7_9_step, + + .assert_reset = arm7_9_assert_reset, + .deassert_reset = arm7_9_deassert_reset, + .soft_reset_halt = arm7_9_soft_reset_halt, + + .get_gdb_reg_list = armv4_5_get_gdb_reg_list, + + .read_memory = arm7_9_read_memory, + .write_memory = arm7_9_write_memory, + .bulk_write_memory = arm7_9_bulk_write_memory, + + .run_algorithm = armv4_5_run_algorithm, + + .add_breakpoint = arm7_9_add_breakpoint, + .remove_breakpoint = arm7_9_remove_breakpoint, + .add_watchpoint = arm7_9_add_watchpoint, + .remove_watchpoint = arm7_9_remove_watchpoint, + + .register_commands = arm7tdmi_register_commands, + .target_command = arm7tdmi_target_command, + .init_target = arm7tdmi_init_target, + .quit = arm7tdmi_quit +}; + +int arm7tdmi_examine_debug_reason(target_t *target) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + + /* only check the debug reason if we don't know it already */ + if ((target->debug_reason != DBG_REASON_DBGRQ) + && (target->debug_reason != DBG_REASON_SINGLESTEP)) + { + scan_field_t fields[2]; + u8 databus[4]; + u8 breakpoint; + + jtag_add_end_state(TAP_PD); + + fields[0].device = arm7_9->jtag_info.chain_pos; + fields[0].num_bits = 1; + fields[0].out_value = NULL; + fields[0].out_mask = NULL; + fields[0].in_value = &breakpoint; + 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 = arm7_9->jtag_info.chain_pos; + fields[1].num_bits = 32; + fields[1].out_value = NULL; + fields[1].out_mask = NULL; + fields[1].in_value = databus; + fields[1].in_check_value = NULL; + fields[1].in_check_mask = NULL; + fields[1].in_handler = NULL; + fields[1].in_handler_priv = NULL; + + arm_jtag_scann(&arm7_9->jtag_info, 0x1); + arm_jtag_set_instr(&arm7_9->jtag_info, arm7_9->jtag_info.intest_instr); + + jtag_add_dr_scan(2, fields, TAP_PD); + jtag_execute_queue(); + + fields[0].in_value = NULL; + fields[0].out_value = &breakpoint; + fields[1].in_value = NULL; + fields[1].out_value = databus; + + jtag_add_dr_scan(2, fields, TAP_PD); + + if (breakpoint & 1) + target->debug_reason = DBG_REASON_WATCHPOINT; + else + target->debug_reason = DBG_REASON_BREAKPOINT; + } + + return ERROR_OK; +} + +/* put an instruction in the ARM7TDMI pipeline or write the data bus, and optionally read data */ +int arm7tdmi_clock_out(arm_jtag_t *jtag_info, u32 out, u32 *in, int breakpoint) +{ + scan_field_t fields[2]; + u8 out_buf[4]; + u8 breakpoint_buf; + + out = flip_u32(out, 32); + buf_set_u32(out_buf, 0, 32, out); + buf_set_u32(&breakpoint_buf, 0, 1, breakpoint); + + jtag_add_end_state(TAP_PD); + arm_jtag_scann(jtag_info, 0x1); + arm_jtag_set_instr(jtag_info, jtag_info->intest_instr); + + fields[0].device = jtag_info->chain_pos; + fields[0].num_bits = 1; + fields[0].out_value = &breakpoint_buf; + 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 = jtag_info->chain_pos; + fields[1].num_bits = 32; + fields[1].out_value = out_buf; + fields[1].out_mask = NULL; + if (in) + { + fields[1].in_value = (u8*)in; + fields[1].in_handler = arm_jtag_buf_to_u32_flip; + fields[1].in_handler_priv = in; + } else + { + 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; + + jtag_add_dr_scan(2, fields, -1); + + jtag_add_runtest(0, -1); + +#ifdef _DEBUG_INSTRUCTION_EXECUTION_ +{ + char* in_string; + jtag_execute_queue(); + + if (in) + { + in_string = buf_to_char((u8*)in, 32); + DEBUG("out: 0x%8.8x, in: %s", flip_u32(out, 32), in_string); + free(in_string); + } + else + DEBUG("out: 0x%8.8x", flip_u32(out, 32)); +} +#endif + + return ERROR_OK; +} + +/* put an instruction in the ARM7TDMI pipeline, and optionally read data */ +int arm7tdmi_clock_data_in(arm_jtag_t *jtag_info, u32 *in) +{ + scan_field_t fields[2]; + + jtag_add_end_state(TAP_PD); + arm_jtag_scann(jtag_info, 0x1); + arm_jtag_set_instr(jtag_info, jtag_info->intest_instr); + + fields[0].device = jtag_info->chain_pos; + fields[0].num_bits = 1; + fields[0].out_value = NULL; + 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 = jtag_info->chain_pos; + fields[1].num_bits = 32; + fields[1].out_value = NULL; + fields[1].out_mask = NULL; + fields[1].in_value = (u8*)in; + fields[1].in_handler = arm_jtag_buf_to_u32_flip; + fields[1].in_handler_priv = in; + fields[1].in_check_value = NULL; + fields[1].in_check_mask = NULL; + + jtag_add_dr_scan(2, fields, -1); + + jtag_add_runtest(0, -1); + +#ifdef _DEBUG_INSTRUCTION_EXECUTION_ +{ + char* in_string; + jtag_execute_queue(); + + if (in) + { + in_string = buf_to_char((u8*)in, 32); + DEBUG("in: %s", in_string); + free(in_string); + } +} +#endif + + return ERROR_OK; +} + +void arm7tdmi_change_to_arm(target_t *target, u32 *r0, u32 *pc) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + /* save r0 before using it and put system in ARM state + * to allow common handling of ARM and THUMB debugging */ + + /* fetch STR r0, [r0] */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), NULL, 0); + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0); + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0); + /* nothing fetched, STR r0, [r0] in Execute (2) */ + arm7tdmi_clock_data_in(jtag_info, r0); + + /* MOV r0, r15 fetched, STR in Decode */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_MOV(0, 15), NULL, 0); + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), NULL, 0); + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0); + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0); + /* nothing fetched, STR r0, [r0] in Execute (2) */ + arm7tdmi_clock_data_in(jtag_info, pc); + + /* fetch MOV */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_MOV_IM(0, 0x0), NULL, 0); + + /* fetch BX */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_BX(0), NULL, 0); + /* NOP fetched, BX in Decode, MOV in Execute */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0); + /* NOP fetched, BX in Execute (1) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0); + + jtag_execute_queue(); + + /* fix program counter: + * MOV r0, r15 was the 4th instruction (+6) + * reading PC in Thumb state gives address of instruction + 4 + */ + *pc -= 0xa; + +} + +void arm7tdmi_read_core_regs(target_t *target, u32 mask, u32* core_regs[16]) +{ + int i; + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + /* STMIA r0-15, [r0] at debug speed + * register values will start to appear on 4th DCLK + */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), NULL, 0); + + /* fetch NOP, STM in DECODE stage */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* fetch NOP, STM in EXECUTE stage (1st cycle) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + + for (i = 0; i <= 15; i++) + { + if (mask & (1 << i)) + /* nothing fetched, STM still in EXECUTE (1+i cycle) */ + arm7tdmi_clock_data_in(jtag_info, core_regs[i]); + } + +} + +void arm7tdmi_read_xpsr(target_t *target, u32 *xpsr, int spsr) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + /* MRS r0, cpsr */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_MRS(0, spsr & 1), NULL, 0); + + /* STR r0, [r15] */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_STR(0, 15), NULL, 0); + /* fetch NOP, STR in DECODE stage */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* fetch NOP, STR in EXECUTE stage (1st cycle) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* nothing fetched, STR still in EXECUTE (2nd cycle) */ + arm7tdmi_clock_data_in(jtag_info, xpsr); + +} + +void arm7tdmi_write_xpsr(target_t *target, u32 xpsr, int spsr) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + DEBUG("xpsr: %8.8x, spsr: %i", xpsr, spsr); + + /* MSR1 fetched */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr & 0xff, 0, 1, spsr), NULL, 0); + /* MSR2 fetched, MSR1 in DECODE */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff00) >> 8, 0xc, 2, spsr), NULL, 0); + /* MSR3 fetched, MSR1 in EXECUTE (1), MSR2 in DECODE */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff0000) >> 16, 0x8, 4, spsr), NULL, 0); + /* nothing fetched, MSR1 in EXECUTE (2) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* MSR4 fetched, MSR2 in EXECUTE (1), MSR3 in DECODE */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff000000) >> 24, 0x4, 8, spsr), NULL, 0); + /* nothing fetched, MSR2 in EXECUTE (2) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* NOP fetched, MSR3 in EXECUTE (1), MSR4 in DECODE */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* nothing fetched, MSR3 in EXECUTE (2) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* NOP fetched, MSR4 in EXECUTE (1) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* nothing fetched, MSR4 in EXECUTE (2) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); +} + +void arm7tdmi_write_xpsr_im8(target_t *target, u8 xpsr_im, int rot, int spsr) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + DEBUG("xpsr_im: %2.2x, rot: %i, spsr: %i", xpsr_im, rot, spsr); + + /* MSR fetched */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr_im, rot, 1, spsr), NULL, 0); + /* NOP fetched, MSR in DECODE */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* NOP fetched, MSR in EXECUTE (1) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* nothing fetched, MSR in EXECUTE (2) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + +} + +void arm7tdmi_write_core_regs(target_t *target, u32 mask, u32 core_regs[16]) +{ + int i; + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + /* LDMIA r0-15, [r0] at debug speed + * register values will start to appear on 4th DCLK + */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 0), NULL, 0); + + /* fetch NOP, LDM in DECODE stage */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* fetch NOP, LDM in EXECUTE stage (1st cycle) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + + for (i = 0; i <= 15; i++) + { + if (mask & (1 << i)) + /* nothing fetched, LDM still in EXECUTE (1+i cycle) */ + arm7tdmi_clock_out(jtag_info, core_regs[i], NULL, 0); + } + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + +} + +void arm7tdmi_load_word_regs(target_t *target, u32 mask) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + /* put system-speed load-multiple into the pipeline */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1); + arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 1), NULL, 0); + +} + +void arm7tdmi_load_hword_reg(target_t *target, int num) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + /* put system-speed load half-word into the pipeline */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1); + arm7tdmi_clock_out(jtag_info, ARMV4_5_LDRH_IP(num, 0), NULL, 0); + +} + +void arm7tdmi_load_byte_reg(target_t *target, int num) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + /* put system-speed load byte into the pipeline */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1); + arm7tdmi_clock_out(jtag_info, ARMV4_5_LDRB_IP(num, 0), NULL, 0); + +} + +void arm7tdmi_store_word_regs(target_t *target, u32 mask) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + /* put system-speed store-multiple into the pipeline */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1); + arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask, 0, 1), NULL, 0); + +} + +void arm7tdmi_store_hword_reg(target_t *target, int num) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + /* put system-speed store half-word into the pipeline */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1); + arm7tdmi_clock_out(jtag_info, ARMV4_5_STRH_IP(num, 0), NULL, 0); + +} + +void arm7tdmi_store_byte_reg(target_t *target, int num) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + /* put system-speed store byte into the pipeline */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1); + arm7tdmi_clock_out(jtag_info, ARMV4_5_STRB_IP(num, 0), NULL, 0); + +} + +void arm7tdmi_write_pc(target_t *target, u32 pc) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + /* LDMIA r0-15, [r0] at debug speed + * register values will start to appear on 4th DCLK + */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x8000, 0, 0), NULL, 0); + /* fetch NOP, LDM in DECODE stage */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* fetch NOP, LDM in EXECUTE stage (1st cycle) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* nothing fetched, LDM in EXECUTE stage (1st cycle) load register */ + arm7tdmi_clock_out(jtag_info, pc, NULL, 0); + /* nothing fetched, LDM in EXECUTE stage (2nd cycle) load register */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* nothing fetched, LDM in EXECUTE stage (3rd cycle) load register */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* fetch NOP, LDM in EXECUTE stage (4th cycle) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* fetch NOP, LDM in EXECUTE stage (5th cycle) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); +} + +void arm7tdmi_branch_resume(target_t *target) +{ + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1); + arm7tdmi_clock_out(jtag_info, ARMV4_5_B(0xfffffa, 0), NULL, 0); + +} + +void arm7tdmi_branch_resume_thumb(target_t *target) +{ + DEBUG(""); + + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT]; + + /* LDMIA r0, [r0] at debug speed + * register values will start to appear on 4th DCLK + */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x1, 0, 0), NULL, 0); + + /* fetch NOP, LDM in DECODE stage */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* fetch NOP, LDM in EXECUTE stage (1st cycle) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + /* nothing fetched, LDM in EXECUTE stage (2nd cycle) */ + arm7tdmi_clock_out(jtag_info, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32) | 1, NULL, 0); + /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + + /* Branch and eXchange */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_BX(0), NULL, 0); + + embeddedice_read_reg(dbg_stat); + + /* fetch NOP, BX in DECODE stage */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + + /* target is now in Thumb state */ + embeddedice_read_reg(dbg_stat); + + /* fetch NOP, BX in EXECUTE stage (1st cycle) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0); + + /* target is now in Thumb state */ + embeddedice_read_reg(dbg_stat); + + /* clean r0 bits to avoid alignment problems */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_MOV_IM(0, 0x0), NULL, 0); + /* load r0 value, MOV_IM in Decode*/ + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_LDR(0, 0), NULL, 0); + /* fetch NOP, LDR in Decode, MOV_IM in Execute */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0); + /* fetch NOP, LDR in Execute */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0); + /* nothing fetched, LDR in EXECUTE stage (2nd cycle) */ + arm7tdmi_clock_out(jtag_info, buf_get_u32(armv4_5->core_cache->reg_list[0].value, 0, 32), NULL, 0); + /* nothing fetched, LDR in EXECUTE stage (3rd cycle) */ + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0); + + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0); + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0); + + embeddedice_read_reg(dbg_stat); + + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 1); + arm7tdmi_clock_out(jtag_info, ARMV4_5_T_B(0x7f7), NULL, 0); + +} + +void arm7tdmi_build_reg_cache(target_t *target) +{ + reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache); + /* get pointers to arch-specific information */ + armv4_5_common_t *armv4_5 = target->arch_info; + arm7_9_common_t *arm7_9 = armv4_5->arch_info; + arm_jtag_t *jtag_info = &arm7_9->jtag_info; + arm7tdmi_common_t *arch_info = arm7_9->arch_info; + + + (*cache_p) = armv4_5_build_reg_cache(target, armv4_5); + armv4_5->core_cache = (*cache_p); + + (*cache_p)->next = embeddedice_build_reg_cache(target, jtag_info, 0); + arm7_9->eice_cache = (*cache_p)->next; + + if (arm7_9->has_etm) + { + (*cache_p)->next->next = etm_build_reg_cache(target, jtag_info, 0); + arm7_9->etm_cache = (*cache_p)->next->next; + } + + if (arch_info->has_monitor_mode) + (*cache_p)->next->reg_list[0].size = 6; + else + (*cache_p)->next->reg_list[0].size = 3; + + (*cache_p)->next->reg_list[1].size = 5; + +} + +int arm7tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target) +{ + + arm7tdmi_build_reg_cache(target); + + return ERROR_OK; + +} + +int arm7tdmi_quit() +{ + + return ERROR_OK; +} + +int arm7tdmi_init_arch_info(target_t *target, arm7tdmi_common_t *arm7tdmi, int chain_pos, char *variant) +{ + armv4_5_common_t *armv4_5; + arm7_9_common_t *arm7_9; + int has_etm = 0; + + arm7_9 = &arm7tdmi->arm7_9_common; + armv4_5 = &arm7_9->armv4_5_common; + + /* prepare JTAG information for the new target */ + arm7_9->jtag_info.chain_pos = chain_pos; + arm7_9->jtag_info.scann_size = 4; + + /* register arch-specific functions */ + arm7_9->examine_debug_reason = arm7tdmi_examine_debug_reason; + arm7_9->change_to_arm = arm7tdmi_change_to_arm; + arm7_9->read_core_regs = arm7tdmi_read_core_regs; + arm7_9->read_xpsr = arm7tdmi_read_xpsr; + + arm7_9->write_xpsr = arm7tdmi_write_xpsr; + arm7_9->write_xpsr_im8 = arm7tdmi_write_xpsr_im8; + arm7_9->write_core_regs = arm7tdmi_write_core_regs; + + arm7_9->load_word_regs = arm7tdmi_load_word_regs; + arm7_9->load_hword_reg = arm7tdmi_load_hword_reg; + arm7_9->load_byte_reg = arm7tdmi_load_byte_reg; + + arm7_9->store_word_regs = arm7tdmi_store_word_regs; + arm7_9->store_hword_reg = arm7tdmi_store_hword_reg; + arm7_9->store_byte_reg = arm7tdmi_store_byte_reg; + + arm7_9->write_pc = arm7tdmi_write_pc; + arm7_9->branch_resume = arm7tdmi_branch_resume; + arm7_9->branch_resume_thumb = arm7tdmi_branch_resume_thumb; + + arm7_9->enable_single_step = arm7_9_enable_eice_step; + arm7_9->disable_single_step = arm7_9_disable_eice_step; + + arm7_9->pre_debug_entry = NULL; + arm7_9->post_debug_entry = NULL; + + arm7_9->pre_restore_context = NULL; + arm7_9->post_restore_context = NULL; + + /* initialize arch-specific breakpoint handling */ + buf_set_u32((u8*)(&arm7_9->arm_bkpt), 0, 32, 0xdeeedeee); + buf_set_u32((u8*)(&arm7_9->thumb_bkpt), 0, 16, 0xdeee); + + arm7_9->sw_bkpts_use_wp = 1; + arm7_9->sw_bkpts_enabled = 0; + arm7_9->dbgreq_adjust_pc = 2; + arm7_9->arch_info = arm7tdmi; + + arm7tdmi->has_monitor_mode = 0; + arm7tdmi->arch_info = NULL; + arm7tdmi->common_magic = ARM7TDMI_COMMON_MAGIC; + + if (variant) + { + if (strcmp(variant, "arm7tdmi-s_r4") == 0) + arm7tdmi->has_monitor_mode = 1; + else if (strcmp(variant, "arm7tdmi_r4") == 0) + arm7tdmi->has_monitor_mode = 1; + else if (strcmp(variant, "lpc2000") == 0) + { + arm7tdmi->has_monitor_mode = 1; + has_etm = 1; + } + arm7tdmi->variant = strdup(variant); + } + else + arm7tdmi->variant = strdup(""); + + arm7_9_init_arch_info(target, arm7_9); + + arm7_9->has_etm = has_etm; + + return ERROR_OK; +} + +/* target arm7tdmi */ +int arm7tdmi_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target) +{ + int chain_pos; + char *variant = NULL; + arm7tdmi_common_t *arm7tdmi = malloc(sizeof(arm7tdmi_common_t)); + + if (argc < 4) + { + ERROR("'target arm7tdmi' requires at least one additional argument"); + exit(-1); + } + + chain_pos = strtoul(args[2], NULL, 0); + + if (argc >= 5) + variant = args[4]; + + arm7tdmi_init_arch_info(target, arm7tdmi, chain_pos, variant); + + return ERROR_OK; +} + +int arm7tdmi_register_commands(struct command_context_s *cmd_ctx) +{ + int retval; + + retval = arm7_9_register_commands(cmd_ctx); + + return ERROR_OK; + +} + -- cgit v1.1