src/target/mem_ap.c

   1 /*****************************************************************************
   2  *   Copyright (C) 2016 by Matthias Welwarsky <matthias.welwarsky@sysgo.com> *
   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
  15 #ifdef HAVE_CONFIG_H
  16 #include "config.h"
  17 #endif
  18
  19 #include "target.h"
  20 #include "target_type.h"
  21 #include "arm.h"
  22 #include "arm_adi_v5.h"
  23
  24 #include <jtag/jtag.h>
  25
  26 struct mem_ap {
  27         struct arm arm;
  28         struct adiv5_ap *ap;
  29         int ap_num;
  30 };
  31
  32 static int mem_ap_target_create(struct target *target, Jim_Interp *interp)
  33 {
  34         struct mem_ap *mem_ap;
  35         struct adiv5_private_config *pc;
  36
  37         pc = (struct adiv5_private_config *)target->private_config;
  38         if (pc == NULL)
  39                 return ERROR_FAIL;
  40
  41         if (pc->ap_num == DP_APSEL_INVALID) {
  42                 LOG_ERROR("AP number not specified");
  43                 return ERROR_FAIL;
  44         }
  45
  46         mem_ap = calloc(1, sizeof(struct mem_ap));
  47         if (mem_ap == NULL) {
  48                 LOG_ERROR("Out of memory");
  49                 return ERROR_FAIL;
  50         }
  51
  52         mem_ap->ap_num = pc->ap_num;
  53         mem_ap->arm.common_magic = ARM_COMMON_MAGIC;
  54         mem_ap->arm.dap = pc->dap;
  55
  56         target->arch_info = mem_ap;
  57
  58         return ERROR_OK;
  59 }
  60
  61 static int mem_ap_init_target(struct command_context *cmd_ctx, struct target *target)
  62 {
  63         LOG_DEBUG("%s", __func__);
  64         target->state = TARGET_UNKNOWN;
  65         return ERROR_OK;
  66 }
  67
  68 static void mem_ap_deinit_target(struct target *target)
  69 {
  70         LOG_DEBUG("%s", __func__);
  71
  72         free(target->private_config);
  73         free(target->arch_info);
  74         return;
  75 }
  76
  77 static int mem_ap_arch_state(struct target *target)
  78 {
  79         LOG_DEBUG("%s", __func__);
  80         return ERROR_OK;
  81 }
  82
  83 static int mem_ap_poll(struct target *target)
  84 {
  85         if (target->state == TARGET_UNKNOWN)
  86                 target->state = TARGET_RUNNING;
  87
  88         return ERROR_OK;
  89 }
  90
  91 static int mem_ap_halt(struct target *target)
  92 {
  93         LOG_DEBUG("%s", __func__);
  94         target->state = TARGET_HALTED;
  95         return ERROR_OK;
  96 }
  97
  98 static int mem_ap_resume(struct target *target, int current, target_addr_t address,
  99                 int handle_breakpoints, int debug_execution)
 100 {
 101         LOG_DEBUG("%s", __func__);
 102         target->state = TARGET_RUNNING;
 103         return ERROR_OK;
 104 }
 105
 106 static int mem_ap_step(struct target *target, int current, target_addr_t address,
 107                                 int handle_breakpoints)
 108 {
 109         LOG_DEBUG("%s", __func__);
 110         target->state = TARGET_HALTED;
 111         return ERROR_OK;
 112 }
 113
 114 static int mem_ap_assert_reset(struct target *target)
 115 {
 116         target->state = TARGET_RESET;
 117
 118         LOG_DEBUG("%s", __func__);
 119         return ERROR_OK;
 120 }
 121
 122 static int mem_ap_examine(struct target *target)
 123 {
 124         struct mem_ap *mem_ap = target->arch_info;
 125
 126         if (!target_was_examined(target)) {
 127                 mem_ap->ap = dap_ap(mem_ap->arm.dap, mem_ap->ap_num);
 128                 target_set_examined(target);
 129                 target->state = TARGET_UNKNOWN;
 130                 return mem_ap_init(mem_ap->ap);
 131         }
 132
 133         return ERROR_OK;
 134 }
 135
 136 static int mem_ap_deassert_reset(struct target *target)
 137 {
 138         if (target->reset_halt)
 139                 target->state = TARGET_HALTED;
 140         else
 141                 target->state = TARGET_RUNNING;
 142
 143         LOG_DEBUG("%s", __func__);
 144         return ERROR_OK;
 145 }
 146
 147 static int mem_ap_read_memory(struct target *target, target_addr_t address,
 148                                uint32_t size, uint32_t count, uint8_t *buffer)
 149 {
 150         struct mem_ap *mem_ap = target->arch_info;
 151
 152         LOG_DEBUG("Reading memory at physical address " TARGET_ADDR_FMT
 153                   "; size %" PRIu32 "; count %" PRIu32, address, size, count);
 154
 155         if (count == 0 || buffer == NULL)
 156                 return ERROR_COMMAND_SYNTAX_ERROR;
 157
 158         return mem_ap_read_buf(mem_ap->ap, buffer, size, count, address);
 159 }
 160
 161 static int mem_ap_write_memory(struct target *target, target_addr_t address,
 162                                 uint32_t size, uint32_t count,
 163                                 const uint8_t *buffer)
 164 {
 165         struct mem_ap *mem_ap = target->arch_info;
 166
 167         LOG_DEBUG("Writing memory at physical address " TARGET_ADDR_FMT
 168                   "; size %" PRIu32 "; count %" PRIu32, address, size, count);
 169
 170         if (count == 0 || buffer == NULL)
 171                 return ERROR_COMMAND_SYNTAX_ERROR;
 172
 173         return mem_ap_write_buf(mem_ap->ap, buffer, size, count, address);
 174 }
 175
 176 struct target_type mem_ap_target = {
 177         .name = "mem_ap",
 178
 179         .target_create = mem_ap_target_create,
 180         .init_target = mem_ap_init_target,
 181         .deinit_target = mem_ap_deinit_target,
 182         .examine = mem_ap_examine,
 183         .target_jim_configure = adiv5_jim_configure,
 184
 185         .poll = mem_ap_poll,
 186         .arch_state = mem_ap_arch_state,
 187
 188         .halt = mem_ap_halt,
 189         .resume = mem_ap_resume,
 190         .step = mem_ap_step,
 191
 192         .assert_reset = mem_ap_assert_reset,
 193         .deassert_reset = mem_ap_deassert_reset,
 194
 195         .read_memory = mem_ap_read_memory,
 196         .write_memory = mem_ap_write_memory,
 197 };