365 lines
10 KiB
C
365 lines
10 KiB
C
/***************************************************************************
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* Copyright (C) 2005 by Dominic Rath *
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* Dominic.Rath@gmx.de *
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* *
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* Copyright (C) 2008 by Spencer Oliver *
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* spen@spen-soft.co.uk *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "arm966e.h"
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#include "arm7_9_common.h"
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#include "register.h"
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#include "target.h"
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#include "armv4_5.h"
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#include "embeddedice.h"
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#include "log.h"
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#include "jtag.h"
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#include "arm_jtag.h"
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#include <stdlib.h>
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#include <string.h>
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#if 0
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#define _DEBUG_INSTRUCTION_EXECUTION_
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#endif
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/* cli handling */
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int arm966e_register_commands(struct command_context_s *cmd_ctx);
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/* forward declarations */
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int arm966e_target_create(struct target_s *target, Jim_Interp *interp);
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int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
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int arm966e_quit(void);
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target_type_t arm966e_target =
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{
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.name = "arm966e",
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.poll = arm7_9_poll,
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.arch_state = armv4_5_arch_state,
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.target_request_data = arm7_9_target_request_data,
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.halt = arm7_9_halt,
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.resume = arm7_9_resume,
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.step = arm7_9_step,
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.assert_reset = arm7_9_assert_reset,
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.deassert_reset = arm7_9_deassert_reset,
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.soft_reset_halt = arm7_9_soft_reset_halt,
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.get_gdb_reg_list = armv4_5_get_gdb_reg_list,
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.read_memory = arm7_9_read_memory,
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.write_memory = arm7_9_write_memory,
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.bulk_write_memory = arm7_9_bulk_write_memory,
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.checksum_memory = arm7_9_checksum_memory,
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.blank_check_memory = arm7_9_blank_check_memory,
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.run_algorithm = armv4_5_run_algorithm,
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.add_breakpoint = arm7_9_add_breakpoint,
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.remove_breakpoint = arm7_9_remove_breakpoint,
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.add_watchpoint = arm7_9_add_watchpoint,
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.remove_watchpoint = arm7_9_remove_watchpoint,
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.register_commands = arm966e_register_commands,
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.target_create = arm966e_target_create,
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.init_target = arm966e_init_target,
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.examine = arm9tdmi_examine,
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.quit = arm966e_quit,
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};
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int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
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{
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arm9tdmi_init_target(cmd_ctx, target);
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return ERROR_OK;
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}
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int arm966e_quit(void)
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{
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return ERROR_OK;
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}
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int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, jtag_tap_t *tap, const char *variant)
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{
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arm9tdmi_common_t *arm9tdmi = &arm966e->arm9tdmi_common;
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arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
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arm9tdmi_init_arch_info(target, arm9tdmi, tap, variant);
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arm9tdmi->arch_info = arm966e;
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arm966e->common_magic = ARM966E_COMMON_MAGIC;
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/* The ARM966E-S implements the ARMv5TE architecture which
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* has the BKPT instruction, so we don't have to use a watchpoint comparator
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*/
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arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
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arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
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return ERROR_OK;
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}
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int arm966e_target_create( struct target_s *target, Jim_Interp *interp )
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{
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arm966e_common_t *arm966e = calloc(1,sizeof(arm966e_common_t));
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arm966e_init_arch_info(target, arm966e, target->tap, target->variant);
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return ERROR_OK;
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}
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int arm966e_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, arm7_9_common_t **arm7_9_p, arm9tdmi_common_t **arm9tdmi_p, arm966e_common_t **arm966e_p)
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{
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armv4_5_common_t *armv4_5 = target->arch_info;
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arm7_9_common_t *arm7_9;
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arm9tdmi_common_t *arm9tdmi;
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arm966e_common_t *arm966e;
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if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
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{
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return -1;
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}
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arm7_9 = armv4_5->arch_info;
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if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
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{
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return -1;
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}
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arm9tdmi = arm7_9->arch_info;
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if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
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{
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return -1;
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}
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arm966e = arm9tdmi->arch_info;
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if (arm966e->common_magic != ARM966E_COMMON_MAGIC)
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{
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return -1;
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}
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*armv4_5_p = armv4_5;
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*arm7_9_p = arm7_9;
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*arm9tdmi_p = arm9tdmi;
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*arm966e_p = arm966e;
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return ERROR_OK;
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}
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int arm966e_read_cp15(target_t *target, int reg_addr, u32 *value)
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{
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int retval = ERROR_OK;
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armv4_5_common_t *armv4_5 = target->arch_info;
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arm7_9_common_t *arm7_9 = armv4_5->arch_info;
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arm_jtag_t *jtag_info = &arm7_9->jtag_info;
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scan_field_t fields[3];
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u8 reg_addr_buf = reg_addr & 0x3f;
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u8 nr_w_buf = 0;
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jtag_add_end_state(TAP_RTI);
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if((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
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{
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return retval;
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}
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arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
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fields[0].tap = jtag_info->tap;
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fields[0].num_bits = 32;
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fields[0].out_value = NULL;
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fields[0].out_mask = NULL;
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fields[0].in_value = NULL;
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fields[0].in_check_value = NULL;
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fields[0].in_check_mask = NULL;
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fields[0].in_handler = NULL;
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fields[0].in_handler_priv = NULL;
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fields[1].tap = jtag_info->tap;
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fields[1].num_bits = 6;
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fields[1].out_value = ®_addr_buf;
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fields[1].out_mask = NULL;
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fields[1].in_value = NULL;
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fields[1].in_check_value = NULL;
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fields[1].in_check_mask = NULL;
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fields[1].in_handler = NULL;
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fields[1].in_handler_priv = NULL;
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fields[2].tap = jtag_info->tap;
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fields[2].num_bits = 1;
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fields[2].out_value = &nr_w_buf;
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fields[2].out_mask = NULL;
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fields[2].in_value = NULL;
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fields[2].in_check_value = NULL;
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fields[2].in_check_mask = NULL;
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fields[2].in_handler = NULL;
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fields[2].in_handler_priv = NULL;
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jtag_add_dr_scan(3, fields, -1);
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fields[0].in_handler_priv = value;
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fields[0].in_handler = arm_jtag_buf_to_u32;
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jtag_add_dr_scan(3, fields, -1);
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#ifdef _DEBUG_INSTRUCTION_EXECUTION_
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if((retval = jtag_execute_queue()) != ERROR_OK)
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{
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return retval;
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}
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LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
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#endif
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return ERROR_OK;
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}
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int arm966e_write_cp15(target_t *target, int reg_addr, u32 value)
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{
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int retval = ERROR_OK;
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armv4_5_common_t *armv4_5 = target->arch_info;
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arm7_9_common_t *arm7_9 = armv4_5->arch_info;
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arm_jtag_t *jtag_info = &arm7_9->jtag_info;
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scan_field_t fields[3];
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u8 reg_addr_buf = reg_addr & 0x3f;
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u8 nr_w_buf = 1;
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u8 value_buf[4];
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buf_set_u32(value_buf, 0, 32, value);
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jtag_add_end_state(TAP_RTI);
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if((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
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{
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return retval;
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}
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arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
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fields[0].tap = jtag_info->tap;
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fields[0].num_bits = 32;
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fields[0].out_value = value_buf;
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fields[0].out_mask = NULL;
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fields[0].in_value = NULL;
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fields[0].in_check_value = NULL;
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fields[0].in_check_mask = NULL;
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fields[0].in_handler = NULL;
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fields[0].in_handler_priv = NULL;
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fields[1].tap = jtag_info->tap;
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fields[1].num_bits = 6;
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fields[1].out_value = ®_addr_buf;
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fields[1].out_mask = NULL;
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fields[1].in_value = NULL;
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fields[1].in_check_value = NULL;
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fields[1].in_check_mask = NULL;
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fields[1].in_handler = NULL;
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fields[1].in_handler_priv = NULL;
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fields[2].tap = jtag_info->tap;
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fields[2].num_bits = 1;
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fields[2].out_value = &nr_w_buf;
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fields[2].out_mask = NULL;
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fields[2].in_value = NULL;
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fields[2].in_check_value = NULL;
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fields[2].in_check_mask = NULL;
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fields[2].in_handler = NULL;
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fields[2].in_handler_priv = NULL;
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jtag_add_dr_scan(3, fields, -1);
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#ifdef _DEBUG_INSTRUCTION_EXECUTION_
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LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
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#endif
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return ERROR_OK;
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}
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int arm966e_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
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{
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int retval;
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target_t *target = get_current_target(cmd_ctx);
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armv4_5_common_t *armv4_5;
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arm7_9_common_t *arm7_9;
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arm9tdmi_common_t *arm9tdmi;
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arm966e_common_t *arm966e;
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arm_jtag_t *jtag_info;
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if (arm966e_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm966e) != ERROR_OK)
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{
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command_print(cmd_ctx, "current target isn't an ARM966e target");
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return ERROR_OK;
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}
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jtag_info = &arm7_9->jtag_info;
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if (target->state != TARGET_HALTED)
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{
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command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
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return ERROR_OK;
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}
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/* one or more argument, access a single register (write if second argument is given */
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if (argc >= 1)
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{
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int address = strtoul(args[0], NULL, 0);
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if (argc == 1)
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{
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u32 value;
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if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
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{
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command_print(cmd_ctx, "couldn't access reg %i", address);
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return ERROR_OK;
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}
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if((retval = jtag_execute_queue()) != ERROR_OK)
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{
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return retval;
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}
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command_print(cmd_ctx, "%i: %8.8x", address, value);
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}
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else if (argc == 2)
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{
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u32 value = strtoul(args[1], NULL, 0);
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if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
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{
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command_print(cmd_ctx, "couldn't access reg %i", address);
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return ERROR_OK;
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}
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command_print(cmd_ctx, "%i: %8.8x", address, value);
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}
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}
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return ERROR_OK;
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}
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int arm966e_register_commands(struct command_context_s *cmd_ctx)
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{
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int retval;
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command_t *arm966e_cmd;
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retval = arm9tdmi_register_commands(cmd_ctx);
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arm966e_cmd = register_command(cmd_ctx, NULL, "arm966e", NULL, COMMAND_ANY, "arm966e specific commands");
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register_command(cmd_ctx, arm966e_cmd, "cp15", arm966e_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <num> [value]");
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return retval;
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}
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