src/target/armv7a.c

   1 /***************************************************************************
   2  *    Copyright (C) 2009 by David Brownell                                 *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  18  ***************************************************************************/
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #include "replacements.h"
  24
  25 #include "armv7a.h"
  26 #include "arm_disassembler.h"
  27
  28 #include "register.h"
  29 #include "binarybuffer.h"
  30 #include "command.h"
  31
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <unistd.h>
  35
  36
  37 static void armv7a_show_fault_registers(struct target *target)
  38 {
  39         uint32_t dfsr, ifsr, dfar, ifar;
  40         struct armv7a_common *armv7a = target_to_armv7a(target);
  41
  42         armv7a->read_cp15(target, 0, 0, 5, 0, &dfsr);
  43         armv7a->read_cp15(target, 0, 1, 5, 0, &ifsr);
  44         armv7a->read_cp15(target, 0, 0, 6, 0, &dfar);
  45         armv7a->read_cp15(target, 0, 2, 6, 0, &ifar);
  46
  47         LOG_USER("Data fault registers        DFSR: %8.8" PRIx32
  48                         ", DFAR: %8.8" PRIx32, dfsr, dfar);
  49         LOG_USER("Instruction fault registers IFSR: %8.8" PRIx32
  50                         ", IFAR: %8.8" PRIx32, ifsr, ifar);
  51
  52 }
  53
  54 int armv7a_arch_state(struct target *target)
  55 {
  56         static const char *state[] =
  57         {
  58                 "disabled", "enabled"
  59         };
  60
  61         struct armv7a_common *armv7a = target_to_armv7a(target);
  62         struct armv4_5_common_s *armv4_5 = &armv7a->armv4_5_common;
  63
  64         if (armv7a->common_magic != ARMV7_COMMON_MAGIC)
  65         {
  66                 LOG_ERROR("BUG: called for a non-ARMv7A target");
  67                 return ERROR_INVALID_ARGUMENTS;
  68         }
  69
  70         LOG_USER("target halted in %s state due to %s, current mode: %s\n"
  71                          "cpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "\n"
  72                          "MMU: %s, D-Cache: %s, I-Cache: %s",
  73                  armv4_5_state_strings[armv4_5->core_state],
  74                  Jim_Nvp_value2name_simple(nvp_target_debug_reason,
  75                                 target->debug_reason)->name,
  76                  arm_mode_name(armv4_5->core_mode),
  77                  buf_get_u32(armv4_5->core_cache
  78                                 ->reg_list[ARMV4_5_CPSR].value, 0, 32),
  79                  buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
  80                  state[armv7a->armv4_5_mmu.mmu_enabled],
  81                  state[armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
  82                  state[armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
  83
  84         if (armv4_5->core_mode == ARMV4_5_MODE_ABT)
  85                 armv7a_show_fault_registers(target);
  86
  87         return ERROR_OK;
  88 }
  89
  90
  91 COMMAND_HANDLER(handle_dap_baseaddr_command)
  92 {
  93         struct target *target = get_current_target(CMD_CTX);
  94         struct armv7a_common *armv7a = target_to_armv7a(target);
  95         struct swjdp_common *swjdp = &armv7a->swjdp_info;
  96
  97         return CALL_COMMAND_HANDLER(dap_baseaddr_command, swjdp);
  98 }
  99
 100 COMMAND_HANDLER(handle_dap_memaccess_command)
 101 {
 102         struct target *target = get_current_target(CMD_CTX);
 103         struct armv7a_common *armv7a = target_to_armv7a(target);
 104         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 105
 106         return CALL_COMMAND_HANDLER(dap_memaccess_command, swjdp);
 107 }
 108
 109 COMMAND_HANDLER(handle_dap_apsel_command)
 110 {
 111         struct target *target = get_current_target(CMD_CTX);
 112         struct armv7a_common *armv7a = target_to_armv7a(target);
 113         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 114
 115         return CALL_COMMAND_HANDLER(dap_apsel_command, swjdp);
 116 }
 117
 118 COMMAND_HANDLER(handle_dap_apid_command)
 119 {
 120         struct target *target = get_current_target(CMD_CTX);
 121         struct armv7a_common *armv7a = target_to_armv7a(target);
 122         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 123
 124         return CALL_COMMAND_HANDLER(dap_apid_command, swjdp);
 125 }
 126
 127 COMMAND_HANDLER(handle_dap_info_command)
 128 {
 129         struct target *target = get_current_target(CMD_CTX);
 130         struct armv7a_common *armv7a = target_to_armv7a(target);
 131         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 132         uint32_t apsel;
 133
 134         switch (CMD_ARGC) {
 135         case 0:
 136                 apsel = swjdp->apsel;
 137                 break;
 138         case 1:
 139                 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], apsel);
 140                 break;
 141         default:
 142                 return ERROR_COMMAND_SYNTAX_ERROR;
 143         }
 144
 145         return dap_info_command(CMD_CTX, swjdp, apsel);
 146 }
 147
 148 int armv7a_register_commands(struct command_context *cmd_ctx)
 149 {
 150         struct command *arm_adi_v5_dap_cmd;
 151
 152         arm_adi_v5_dap_cmd = register_command(cmd_ctx, NULL, "dap",
 153                         NULL, COMMAND_ANY,
 154                         "cortex dap specific commands");
 155
 156         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "info",
 157                         handle_dap_info_command, COMMAND_EXEC,
 158                         "dap info for ap [num], "
 159                         "default currently selected AP");
 160         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "apsel",
 161                         handle_dap_apsel_command, COMMAND_EXEC,
 162                         "select a different AP [num] (default 0)");
 163         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "apid",
 164                         handle_dap_apid_command, COMMAND_EXEC,
 165                         "return id reg from AP [num], "
 166                         "default currently selected AP");
 167         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "baseaddr",
 168                         handle_dap_baseaddr_command, COMMAND_EXEC,
 169                         "return debug base address from AP [num], "
 170                         "default currently selected AP");
 171         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "memaccess",
 172                         handle_dap_memaccess_command, COMMAND_EXEC,
 173                         "set/get number of extra tck for mem-ap memory "
 174                         "bus access [0-255]");
 175
 176         return ERROR_OK;
 177 }