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 const char *armv7a_state_strings[] =
  38 {
  39         "ARM", "Thumb", "Jazelle", "ThumbEE"
  40 };
  41
  42 static void armv7a_show_fault_registers(struct target *target)
  43 {
  44         uint32_t dfsr, ifsr, dfar, ifar;
  45         struct armv7a_common *armv7a = target_to_armv7a(target);
  46
  47         armv7a->read_cp15(target, 0, 0, 5, 0, &dfsr);
  48         armv7a->read_cp15(target, 0, 1, 5, 0, &ifsr);
  49         armv7a->read_cp15(target, 0, 0, 6, 0, &dfar);
  50         armv7a->read_cp15(target, 0, 2, 6, 0, &ifar);
  51
  52         LOG_USER("Data fault registers        DFSR: %8.8" PRIx32
  53                         ", DFAR: %8.8" PRIx32, dfsr, dfar);
  54         LOG_USER("Instruction fault registers IFSR: %8.8" PRIx32
  55                         ", IFAR: %8.8" PRIx32, ifsr, ifar);
  56
  57 }
  58
  59 int armv7a_arch_state(struct target *target)
  60 {
  61         static const char *state[] =
  62         {
  63                 "disabled", "enabled"
  64         };
  65
  66         struct armv7a_common *armv7a = target_to_armv7a(target);
  67         struct armv4_5_common_s *armv4_5 = &armv7a->armv4_5_common;
  68
  69         if (armv7a->common_magic != ARMV7_COMMON_MAGIC)
  70         {
  71                 LOG_ERROR("BUG: called for a non-ARMv7A target");
  72                 return ERROR_INVALID_ARGUMENTS;
  73         }
  74
  75         LOG_USER("target halted in %s state due to %s, current mode: %s\n"
  76                          "cpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "\n"
  77                          "MMU: %s, D-Cache: %s, I-Cache: %s",
  78                  armv7a_state_strings[armv7a->core_state],
  79                  Jim_Nvp_value2name_simple(nvp_target_debug_reason,
  80                                 target->debug_reason)->name,
  81                  arm_mode_name(armv4_5->core_mode),
  82                  buf_get_u32(armv4_5->core_cache
  83                                 ->reg_list[ARMV4_5_CPSR].value, 0, 32),
  84                  buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
  85                  state[armv7a->armv4_5_mmu.mmu_enabled],
  86                  state[armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
  87                  state[armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
  88
  89         if (armv4_5->core_mode == ARMV7A_MODE_ABT)
  90                 armv7a_show_fault_registers(target);
  91
  92         return ERROR_OK;
  93 }
  94
  95
  96 COMMAND_HANDLER(handle_dap_baseaddr_command)
  97 {
  98         struct target *target = get_current_target(CMD_CTX);
  99         struct armv7a_common *armv7a = target_to_armv7a(target);
 100         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 101
 102         return CALL_COMMAND_HANDLER(dap_baseaddr_command, swjdp);
 103 }
 104
 105 COMMAND_HANDLER(handle_dap_memaccess_command)
 106 {
 107         struct target *target = get_current_target(CMD_CTX);
 108         struct armv7a_common *armv7a = target_to_armv7a(target);
 109         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 110
 111         return CALL_COMMAND_HANDLER(dap_memaccess_command, swjdp);
 112 }
 113
 114 COMMAND_HANDLER(handle_dap_apsel_command)
 115 {
 116         struct target *target = get_current_target(CMD_CTX);
 117         struct armv7a_common *armv7a = target_to_armv7a(target);
 118         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 119
 120         return CALL_COMMAND_HANDLER(dap_apsel_command, swjdp);
 121 }
 122
 123 COMMAND_HANDLER(handle_dap_apid_command)
 124 {
 125         struct target *target = get_current_target(CMD_CTX);
 126         struct armv7a_common *armv7a = target_to_armv7a(target);
 127         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 128
 129         return CALL_COMMAND_HANDLER(dap_apid_command, swjdp);
 130 }
 131
 132 COMMAND_HANDLER(handle_dap_info_command)
 133 {
 134         struct target *target = get_current_target(CMD_CTX);
 135         struct armv7a_common *armv7a = target_to_armv7a(target);
 136         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 137         uint32_t apsel;
 138
 139         switch (CMD_ARGC) {
 140         case 0:
 141                 apsel = swjdp->apsel;
 142                 break;
 143         case 1:
 144                 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], apsel);
 145                 break;
 146         default:
 147                 return ERROR_COMMAND_SYNTAX_ERROR;
 148         }
 149
 150         return dap_info_command(CMD_CTX, swjdp, apsel);
 151 }
 152
 153 int armv7a_register_commands(struct command_context *cmd_ctx)
 154 {
 155         struct command *arm_adi_v5_dap_cmd;
 156
 157         arm_adi_v5_dap_cmd = register_command(cmd_ctx, NULL, "dap",
 158                         NULL, COMMAND_ANY,
 159                         "cortex dap specific commands");
 160
 161         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "info",
 162                         handle_dap_info_command, COMMAND_EXEC,
 163                         "dap info for ap [num], "
 164                         "default currently selected AP");
 165         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "apsel",
 166                         handle_dap_apsel_command, COMMAND_EXEC,
 167                         "select a different AP [num] (default 0)");
 168         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "apid",
 169                         handle_dap_apid_command, COMMAND_EXEC,
 170                         "return id reg from AP [num], "
 171                         "default currently selected AP");
 172         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "baseaddr",
 173                         handle_dap_baseaddr_command, COMMAND_EXEC,
 174                         "return debug base address from AP [num], "
 175                         "default currently selected AP");
 176         register_command(cmd_ctx, arm_adi_v5_dap_cmd, "memaccess",
 177                         handle_dap_memaccess_command, COMMAND_EXEC,
 178                         "set/get number of extra tck for mem-ap memory "
 179                         "bus access [0-255]");
 180
 181         return ERROR_OK;
 182 }