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 <helper/replacements.h>
  24
  25 #include "armv7a.h"
  26 #include "arm_disassembler.h"
  27
  28 #include "register.h"
  29 #include <helper/binarybuffer.h>
  30 #include <helper/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         struct arm_dpm *dpm = armv7a->armv4_5_common.dpm;
  42         int retval;
  43
  44         retval = dpm->prepare(dpm);
  45         if (retval != ERROR_OK)
  46                 return;
  47
  48         /* ARMV4_5_MRC(cpnum, op1, r0, CRn, CRm, op2) */
  49
  50         /* c5/c0 - {data, instruction} fault status registers */
  51         retval = dpm->instr_read_data_r0(dpm,
  52                         ARMV4_5_MRC(15, 0, 0, 5, 0, 0),
  53                         &dfsr);
  54         if (retval != ERROR_OK)
  55                 goto done;
  56
  57         retval = dpm->instr_read_data_r0(dpm,
  58                         ARMV4_5_MRC(15, 0, 0, 5, 0, 1),
  59                         &ifsr);
  60         if (retval != ERROR_OK)
  61                 goto done;
  62
  63         /* c6/c0 - {data, instruction} fault address registers */
  64         retval = dpm->instr_read_data_r0(dpm,
  65                         ARMV4_5_MRC(15, 0, 0, 6, 0, 0),
  66                         &dfar);
  67         if (retval != ERROR_OK)
  68                 goto done;
  69
  70         retval = dpm->instr_read_data_r0(dpm,
  71                         ARMV4_5_MRC(15, 0, 0, 6, 0, 2),
  72                         &ifar);
  73         if (retval != ERROR_OK)
  74                 goto done;
  75
  76         LOG_USER("Data fault registers        DFSR: %8.8" PRIx32
  77                         ", DFAR: %8.8" PRIx32, dfsr, dfar);
  78         LOG_USER("Instruction fault registers IFSR: %8.8" PRIx32
  79                         ", IFAR: %8.8" PRIx32, ifsr, ifar);
  80
  81 done:
  82         /* (void) */ dpm->finish(dpm);
  83 }
  84
  85 int armv7a_arch_state(struct target *target)
  86 {
  87         static const char *state[] =
  88         {
  89                 "disabled", "enabled"
  90         };
  91
  92         struct armv7a_common *armv7a = target_to_armv7a(target);
  93         struct arm *armv4_5 = &armv7a->armv4_5_common;
  94
  95         if (armv7a->common_magic != ARMV7_COMMON_MAGIC)
  96         {
  97                 LOG_ERROR("BUG: called for a non-ARMv7A target");
  98                 return ERROR_INVALID_ARGUMENTS;
  99         }
 100
 101         armv4_5_arch_state(target);
 102
 103         LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s",
 104                  state[armv7a->armv4_5_mmu.mmu_enabled],
 105                  state[armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
 106                  state[armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
 107
 108         if (armv4_5->core_mode == ARMV4_5_MODE_ABT)
 109                 armv7a_show_fault_registers(target);
 110         if (target->debug_reason == DBG_REASON_WATCHPOINT)
 111                 LOG_USER("Watchpoint triggered at PC %#08x",
 112                                 (unsigned) armv7a->dpm.wp_pc);
 113
 114         return ERROR_OK;
 115 }
 116
 117
 118 COMMAND_HANDLER(handle_dap_baseaddr_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_baseaddr_command, swjdp);
 125 }
 126
 127 COMMAND_HANDLER(handle_dap_memaccess_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
 133         return CALL_COMMAND_HANDLER(dap_memaccess_command, swjdp);
 134 }
 135
 136 COMMAND_HANDLER(handle_dap_apsel_command)
 137 {
 138         struct target *target = get_current_target(CMD_CTX);
 139         struct armv7a_common *armv7a = target_to_armv7a(target);
 140         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 141
 142         return CALL_COMMAND_HANDLER(dap_apsel_command, swjdp);
 143 }
 144
 145 COMMAND_HANDLER(handle_dap_apid_command)
 146 {
 147         struct target *target = get_current_target(CMD_CTX);
 148         struct armv7a_common *armv7a = target_to_armv7a(target);
 149         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 150
 151         return CALL_COMMAND_HANDLER(dap_apid_command, swjdp);
 152 }
 153
 154 COMMAND_HANDLER(handle_dap_info_command)
 155 {
 156         struct target *target = get_current_target(CMD_CTX);
 157         struct armv7a_common *armv7a = target_to_armv7a(target);
 158         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 159         uint32_t apsel;
 160
 161         switch (CMD_ARGC) {
 162         case 0:
 163                 apsel = swjdp->apsel;
 164                 break;
 165         case 1:
 166                 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], apsel);
 167                 break;
 168         default:
 169                 return ERROR_COMMAND_SYNTAX_ERROR;
 170         }
 171
 172         return dap_info_command(CMD_CTX, swjdp, apsel);
 173 }
 174
 175 static const struct command_registration armv7a_exec_command_handlers[] = {
 176         {
 177                 .name = "info",
 178                 .handler = &handle_dap_info_command,
 179                 .mode = COMMAND_EXEC,
 180                 .help = "dap info for ap [num], "
 181                         "default currently selected AP",
 182         },
 183         {
 184                 .name = "apsel",
 185                 .handler = &handle_dap_apsel_command,
 186                 .mode = COMMAND_EXEC,
 187                 .help = "select a different AP [num] (default 0)",
 188         },
 189         {
 190                 .name = "apid",
 191                 .handler = &handle_dap_apid_command,
 192                 .mode = COMMAND_EXEC,
 193                 .help = "return id reg from AP [num], "
 194                         "default currently selected AP",
 195         },
 196         {
 197                 .name = "baseaddr",
 198                 .handler = &handle_dap_baseaddr_command,
 199                 .mode = COMMAND_EXEC,
 200                 .help = "return debug base address from AP [num], "
 201                         "default currently selected AP",
 202         },
 203         {
 204                 .name = "memaccess",
 205                 .handler = &handle_dap_memaccess_command,
 206                 .mode = COMMAND_EXEC,
 207                 .help = "set/get number of extra tck for mem-ap memory "
 208                         "bus access [0-255]",
 209         },
 210         COMMAND_REGISTRATION_DONE
 211 };
 212 const struct command_registration armv7a_command_handlers[] = {
 213         {
 214                 .name = "dap",
 215                 .mode = COMMAND_ANY,
 216                 .help = "Cortex DAP command group",
 217                 .chain = armv7a_exec_command_handlers,
 218         },
 219         COMMAND_REGISTRATION_DONE
 220 };
 221