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 const struct command_registration armv7a_command_handlers[] = {
 121         {
 122                 .chain = dap_command_handlers,
 123         },
 124         COMMAND_REGISTRATION_DONE
 125 };
 126