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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* 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, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "arm966e.h"
#include "target_type.h"
#include "arm_opcodes.h"
#if 0
#define _DEBUG_INSTRUCTION_EXECUTION_
#endif
int arm966e_init_arch_info(struct target *target, struct arm966e_common *arm966e, struct jtag_tap *tap)
{
struct arm7_9_common *arm7_9 = &arm966e->arm7_9_common;
/* initialize arm7/arm9 specific info (including armv4_5) */
arm9tdmi_init_arch_info(target, arm7_9, tap);
arm966e->common_magic = ARM966E_COMMON_MAGIC;
/* The ARM966E-S implements the ARMv5TE architecture which
* has the BKPT instruction, so we don't have to use a watchpoint comparator
*/
arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
return ERROR_OK;
}
static int arm966e_target_create(struct target *target, Jim_Interp *interp)
{
struct arm966e_common *arm966e = calloc(1, sizeof(struct arm966e_common));
return arm966e_init_arch_info(target, arm966e, target->tap);
}
static int arm966e_verify_pointer(struct command_context *cmd_ctx,
struct arm966e_common *arm966e)
{
if (arm966e->common_magic != ARM966E_COMMON_MAGIC) {
command_print(cmd_ctx, "target is not an ARM966");
return ERROR_TARGET_INVALID;
}
return ERROR_OK;
}
/*
* REVISIT: The "read_cp15" and "write_cp15" commands could hook up
* to eventual mrc() and mcr() routines ... the reg_addr values being
* constructed (for CP15 only) from Opcode_1, Opcode_2, and CRn values.
* See section 7.3 of the ARM966E-S TRM.
*/
static int arm966e_read_cp15(struct target *target, int reg_addr, uint32_t *value)
{
int retval = ERROR_OK;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct arm_jtag *jtag_info = &arm7_9->jtag_info;
struct scan_field fields[3];
uint8_t reg_addr_buf = reg_addr & 0x3f;
uint8_t nr_w_buf = 0;
retval = arm_jtag_scann(jtag_info, 0xf, TAP_IDLE);
if (retval != ERROR_OK)
return retval;
retval = arm_jtag_set_instr(jtag_info->tap, jtag_info->intest_instr, NULL, TAP_IDLE);
if (retval != ERROR_OK)
return retval;
fields[0].num_bits = 32;
/* REVISIT: table 7-2 shows that bits 31-31 need to be
* specified for accessing BIST registers ...
*/
fields[0].out_value = NULL;
fields[0].in_value = NULL;
fields[1].num_bits = 6;
fields[1].out_value = ®_addr_buf;
fields[1].in_value = NULL;
fields[2].num_bits = 1;
fields[2].out_value = &nr_w_buf;
fields[2].in_value = NULL;
jtag_add_dr_scan(jtag_info->tap, 3, fields, TAP_IDLE);
fields[1].in_value = (uint8_t *)value;
jtag_add_dr_scan(jtag_info->tap, 3, fields, TAP_IDLE);
jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)value);
#ifdef _DEBUG_INSTRUCTION_EXECUTION_
retval = jtag_execute_queue();
if (retval != ERROR_OK)
return retval;
LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
#endif
return ERROR_OK;
}
/* EXPORTED to str9x (flash) */
int arm966e_write_cp15(struct target *target, int reg_addr, uint32_t value)
{
int retval = ERROR_OK;
struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
struct arm_jtag *jtag_info = &arm7_9->jtag_info;
struct scan_field fields[3];
uint8_t reg_addr_buf = reg_addr & 0x3f;
uint8_t nr_w_buf = 1;
uint8_t value_buf[4];
buf_set_u32(value_buf, 0, 32, value);
retval = arm_jtag_scann(jtag_info, 0xf, TAP_IDLE);
if (retval != ERROR_OK)
return retval;
retval = arm_jtag_set_instr(jtag_info->tap, jtag_info->intest_instr, NULL, TAP_IDLE);
if (retval != ERROR_OK)
return retval;
fields[0].num_bits = 32;
fields[0].out_value = value_buf;
fields[0].in_value = NULL;
fields[1].num_bits = 6;
fields[1].out_value = ®_addr_buf;
fields[1].in_value = NULL;
fields[2].num_bits = 1;
fields[2].out_value = &nr_w_buf;
fields[2].in_value = NULL;
jtag_add_dr_scan(jtag_info->tap, 3, fields, TAP_IDLE);
#ifdef _DEBUG_INSTRUCTION_EXECUTION_
LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
#endif
return ERROR_OK;
}
COMMAND_HANDLER(arm966e_handle_cp15_command)
{
int retval;
struct target *target = get_current_target(CMD_CTX);
struct arm966e_common *arm966e = target_to_arm966(target);
retval = arm966e_verify_pointer(CMD_CTX, arm966e);
if (retval != ERROR_OK)
return retval;
if (target->state != TARGET_HALTED) {
command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME);
return ERROR_OK;
}
/* one or more argument, access a single register (write if second argument is given */
if (CMD_ARGC >= 1) {
uint32_t address;
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
if (CMD_ARGC == 1) {
uint32_t value;
retval = arm966e_read_cp15(target, address, &value);
if (retval != ERROR_OK) {
command_print(CMD_CTX,
"couldn't access reg %" PRIi32,
address);
return ERROR_OK;
}
retval = jtag_execute_queue();
if (retval != ERROR_OK)
return retval;
command_print(CMD_CTX, "%" PRIi32 ": %8.8" PRIx32,
address, value);
} else if (CMD_ARGC == 2) {
uint32_t value;
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], value);
retval = arm966e_write_cp15(target, address, value);
if (retval != ERROR_OK) {
command_print(CMD_CTX,
"couldn't access reg %" PRIi32,
address);
return ERROR_OK;
}
command_print(CMD_CTX, "%" PRIi32 ": %8.8" PRIx32,
address, value);
}
}
return ERROR_OK;
}
static const struct command_registration arm966e_exec_command_handlers[] = {
{
.name = "cp15",
.handler = arm966e_handle_cp15_command,
.mode = COMMAND_EXEC,
.usage = "regnum [value]",
.help = "display/modify cp15 register",
},
COMMAND_REGISTRATION_DONE
};
const struct command_registration arm966e_command_handlers[] = {
{
.chain = arm9tdmi_command_handlers,
},
{
.name = "arm966e",
.mode = COMMAND_ANY,
.help = "arm966e command group",
.usage = "",
.chain = arm966e_exec_command_handlers,
},
COMMAND_REGISTRATION_DONE
};
/** Holds methods for ARM966 targets. */
struct target_type arm966e_target = {
.name = "arm966e",
.poll = arm7_9_poll,
.arch_state = arm_arch_state,
.target_request_data = arm7_9_target_request_data,
.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 = arm_get_gdb_reg_list,
.read_memory = arm7_9_read_memory,
.write_memory = arm7_9_write_memory_opt,
.checksum_memory = arm_checksum_memory,
.blank_check_memory = arm_blank_check_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,
.commands = arm966e_command_handlers,
.target_create = arm966e_target_create,
.init_target = arm9tdmi_init_target,
.examine = arm7_9_examine,
.check_reset = arm7_9_check_reset,
};
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