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 #include "arm_opcodes.h"
  37
  38
  39 static void armv7a_show_fault_registers(struct target *target)
  40 {
  41         uint32_t dfsr, ifsr, dfar, ifar;
  42         struct armv7a_common *armv7a = target_to_armv7a(target);
  43         struct arm_dpm *dpm = armv7a->armv4_5_common.dpm;
  44         int retval;
  45
  46         retval = dpm->prepare(dpm);
  47         if (retval != ERROR_OK)
  48                 return;
  49
  50         /* ARMV4_5_MRC(cpnum, op1, r0, CRn, CRm, op2) */
  51
  52         /* c5/c0 - {data, instruction} fault status registers */
  53         retval = dpm->instr_read_data_r0(dpm,
  54                         ARMV4_5_MRC(15, 0, 0, 5, 0, 0),
  55                         &dfsr);
  56         if (retval != ERROR_OK)
  57                 goto done;
  58
  59         retval = dpm->instr_read_data_r0(dpm,
  60                         ARMV4_5_MRC(15, 0, 0, 5, 0, 1),
  61                         &ifsr);
  62         if (retval != ERROR_OK)
  63                 goto done;
  64
  65         /* c6/c0 - {data, instruction} fault address registers */
  66         retval = dpm->instr_read_data_r0(dpm,
  67                         ARMV4_5_MRC(15, 0, 0, 6, 0, 0),
  68                         &dfar);
  69         if (retval != ERROR_OK)
  70                 goto done;
  71
  72         retval = dpm->instr_read_data_r0(dpm,
  73                         ARMV4_5_MRC(15, 0, 0, 6, 0, 2),
  74                         &ifar);
  75         if (retval != ERROR_OK)
  76                 goto done;
  77
  78         LOG_USER("Data fault registers        DFSR: %8.8" PRIx32
  79                         ", DFAR: %8.8" PRIx32, dfsr, dfar);
  80         LOG_USER("Instruction fault registers IFSR: %8.8" PRIx32
  81                         ", IFAR: %8.8" PRIx32, ifsr, ifar);
  82
  83 done:
  84         /* (void) */ dpm->finish(dpm);
  85 }
  86
  87 int armv7a_arch_state(struct target *target)
  88 {
  89         static const char *state[] =
  90         {
  91                 "disabled", "enabled"
  92         };
  93
  94         struct armv7a_common *armv7a = target_to_armv7a(target);
  95         struct arm *armv4_5 = &armv7a->armv4_5_common;
  96
  97         if (armv7a->common_magic != ARMV7_COMMON_MAGIC)
  98         {
  99                 LOG_ERROR("BUG: called for a non-ARMv7A target");
 100                 return ERROR_INVALID_ARGUMENTS;
 101         }
 102
 103         arm_arch_state(target);
 104
 105         LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s",
 106                  state[armv7a->armv4_5_mmu.mmu_enabled],
 107                  state[armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
 108                  state[armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
 109
 110         if (armv4_5->core_mode == ARM_MODE_ABT)
 111                 armv7a_show_fault_registers(target);
 112         if (target->debug_reason == DBG_REASON_WATCHPOINT)
 113                 LOG_USER("Watchpoint triggered at PC %#08x",
 114                                 (unsigned) armv7a->dpm.wp_pc);
 115
 116         return ERROR_OK;
 117 }
 118
 119
 120 COMMAND_HANDLER(handle_dap_baseaddr_command)
 121 {
 122         struct target *target = get_current_target(CMD_CTX);
 123         struct armv7a_common *armv7a = target_to_armv7a(target);
 124         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 125
 126         return CALL_COMMAND_HANDLER(dap_baseaddr_command, swjdp);
 127 }
 128
 129 COMMAND_HANDLER(handle_dap_memaccess_command)
 130 {
 131         struct target *target = get_current_target(CMD_CTX);
 132         struct armv7a_common *armv7a = target_to_armv7a(target);
 133         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 134
 135         return CALL_COMMAND_HANDLER(dap_memaccess_command, swjdp);
 136 }
 137
 138 COMMAND_HANDLER(handle_dap_apsel_command)
 139 {
 140         struct target *target = get_current_target(CMD_CTX);
 141         struct armv7a_common *armv7a = target_to_armv7a(target);
 142         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 143
 144         return CALL_COMMAND_HANDLER(dap_apsel_command, swjdp);
 145 }
 146
 147 COMMAND_HANDLER(handle_dap_apid_command)
 148 {
 149         struct target *target = get_current_target(CMD_CTX);
 150         struct armv7a_common *armv7a = target_to_armv7a(target);
 151         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 152
 153         return CALL_COMMAND_HANDLER(dap_apid_command, swjdp);
 154 }
 155
 156 COMMAND_HANDLER(handle_dap_info_command)
 157 {
 158         struct target *target = get_current_target(CMD_CTX);
 159         struct armv7a_common *armv7a = target_to_armv7a(target);
 160         struct swjdp_common *swjdp = &armv7a->swjdp_info;
 161         uint32_t apsel;
 162
 163         switch (CMD_ARGC) {
 164         case 0:
 165                 apsel = swjdp->apsel;
 166                 break;
 167         case 1:
 168                 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], apsel);
 169                 break;
 170         default:
 171                 return ERROR_COMMAND_SYNTAX_ERROR;
 172         }
 173
 174         return dap_info_command(CMD_CTX, swjdp, apsel);
 175 }
 176
 177 /* FIXME this table should be part of generic DAP support, and
 178  * be shared by the ARMv7-A/R and ARMv7-M support ...
 179  */
 180 static const struct command_registration armv7a_exec_command_handlers[] = {
 181         {
 182                 .name = "info",
 183                 .handler = handle_dap_info_command,
 184                 .mode = COMMAND_EXEC,
 185                 .help = "display ROM table for MEM-AP "
 186                         "(default currently selected AP)",
 187                 .usage = "[ap_num]",
 188         },
 189         {
 190                 .name = "apsel",
 191                 .handler = handle_dap_apsel_command,
 192                 .mode = COMMAND_EXEC,
 193                 .help = "Set the currently selected AP (default 0) "
 194                         "and display the result",
 195                 .usage = "[ap_num]",
 196         },
 197         {
 198                 .name = "apid",
 199                 .handler = handle_dap_apid_command,
 200                 .mode = COMMAND_EXEC,
 201                 .help = "return ID register from AP "
 202                         "(default currently selected AP)",
 203                 .usage = "[ap_num]",
 204         },
 205         {
 206                 .name = "baseaddr",
 207                 .handler = handle_dap_baseaddr_command,
 208                 .mode = COMMAND_EXEC,
 209                 .help = "return debug base address from MEM-AP "
 210                         "(default currently selected AP)",
 211                 .usage = "[ap_num]",
 212         },
 213         {
 214                 .name = "memaccess",
 215                 .handler = handle_dap_memaccess_command,
 216                 .mode = COMMAND_EXEC,
 217                 .help = "set/get number of extra tck for MEM-AP memory "
 218                         "bus access [0-255]",
 219                 .usage = "[cycles]",
 220         },
 221         COMMAND_REGISTRATION_DONE
 222 };
 223 const struct command_registration armv7a_command_handlers[] = {
 224         {
 225                 .name = "dap",
 226                 .mode = COMMAND_ANY,
 227                 .help = "Cortex DAP command group",
 228                 .chain = armv7a_exec_command_handlers,
 229         },
 230         COMMAND_REGISTRATION_DONE
 231 };
 232