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 = calloc(1, sizeof(struct 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->ap_num = pc->ap_num;
  47         mem_ap->arm.common_magic = ARM_COMMON_MAGIC;
  48         mem_ap->arm.dap = pc->dap;
  49
  50         target->arch_info = mem_ap;
  51
  52         return ERROR_OK;
  53 }
  54
  55 static int mem_ap_init_target(struct command_context *cmd_ctx, struct target *target)
  56 {
  57         LOG_DEBUG("%s", __func__);
  58         target->state = TARGET_UNKNOWN;
  59         return ERROR_OK;
  60 }
  61
  62 static int mem_ap_arch_state(struct target *target)
  63 {
  64         LOG_DEBUG("%s", __func__);
  65         return ERROR_OK;
  66 }
  67
  68 static int mem_ap_poll(struct target *target)
  69 {
  70         if (target->state == TARGET_UNKNOWN)
  71                 target->state = TARGET_RUNNING;
  72
  73         return ERROR_OK;
  74 }
  75
  76 static int mem_ap_halt(struct target *target)
  77 {
  78         LOG_DEBUG("%s", __func__);
  79         target->state = TARGET_HALTED;
  80         return ERROR_OK;
  81 }
  82
  83 static int mem_ap_resume(struct target *target, int current, target_addr_t address,
  84                 int handle_breakpoints, int debug_execution)
  85 {
  86         LOG_DEBUG("%s", __func__);
  87         target->state = TARGET_RUNNING;
  88         return ERROR_OK;
  89 }
  90
  91 static int mem_ap_step(struct target *target, int current, target_addr_t address,
  92                                 int handle_breakpoints)
  93 {
  94         LOG_DEBUG("%s", __func__);
  95         target->state = TARGET_HALTED;
  96         return ERROR_OK;
  97 }
  98
  99 static int mem_ap_assert_reset(struct target *target)
 100 {
 101         target->state = TARGET_RESET;
 102
 103         LOG_DEBUG("%s", __func__);
 104         return ERROR_OK;
 105 }
 106
 107 static int mem_ap_examine(struct target *target)
 108 {
 109         struct mem_ap *mem_ap = target->arch_info;
 110
 111         if (!target_was_examined(target)) {
 112                 mem_ap->ap = dap_ap(mem_ap->arm.dap, mem_ap->ap_num);
 113                 target_set_examined(target);
 114                 target->state = TARGET_UNKNOWN;
 115                 return mem_ap_init(mem_ap->ap);
 116         }
 117
 118         return ERROR_OK;
 119 }
 120
 121 static int mem_ap_deassert_reset(struct target *target)
 122 {
 123         if (target->reset_halt)
 124                 target->state = TARGET_HALTED;
 125         else
 126                 target->state = TARGET_RUNNING;
 127
 128         LOG_DEBUG("%s", __func__);
 129         return ERROR_OK;
 130 }
 131
 132 static int mem_ap_read_memory(struct target *target, target_addr_t address,
 133                                uint32_t size, uint32_t count, uint8_t *buffer)
 134 {
 135         struct mem_ap *mem_ap = target->arch_info;
 136
 137         LOG_DEBUG("Reading memory at physical address 0x" TARGET_ADDR_FMT
 138                   "; size %" PRId32 "; count %" PRId32, address, size, count);
 139
 140         if (count == 0 || buffer == NULL)
 141                 return ERROR_COMMAND_SYNTAX_ERROR;
 142
 143         return mem_ap_read_buf(mem_ap->ap, buffer, size, count, address);
 144 }
 145
 146 static int mem_ap_write_memory(struct target *target, target_addr_t address,
 147                                 uint32_t size, uint32_t count,
 148                                 const uint8_t *buffer)
 149 {
 150         struct mem_ap *mem_ap = target->arch_info;
 151
 152         LOG_DEBUG("Writing memory at physical address 0x" TARGET_ADDR_FMT
 153                   "; size %" PRId32 "; count %" PRId32, address, size, count);
 154
 155         if (count == 0 || buffer == NULL)
 156                 return ERROR_COMMAND_SYNTAX_ERROR;
 157
 158         return mem_ap_write_buf(mem_ap->ap, buffer, size, count, address);
 159 }
 160
 161 struct target_type mem_ap_target = {
 162         .name = "mem_ap",
 163
 164         .target_create = mem_ap_target_create,
 165         .init_target = mem_ap_init_target,
 166         .examine = mem_ap_examine,
 167         .target_jim_configure = adiv5_jim_configure,
 168
 169         .poll = mem_ap_poll,
 170         .arch_state = mem_ap_arch_state,
 171
 172         .halt = mem_ap_halt,
 173         .resume = mem_ap_resume,
 174         .step = mem_ap_step,
 175
 176         .assert_reset = mem_ap_assert_reset,
 177         .deassert_reset = mem_ap_deassert_reset,
 178
 179         .read_memory = mem_ap_read_memory,
 180         .write_memory = mem_ap_write_memory,
 181 };