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 int mem_ap_arch_state(struct target *target)
  69 {
  70         LOG_DEBUG("%s", __func__);
  71         return ERROR_OK;
  72 }
  73
  74 static int mem_ap_poll(struct target *target)
  75 {
  76         if (target->state == TARGET_UNKNOWN)
  77                 target->state = TARGET_RUNNING;
  78
  79         return ERROR_OK;
  80 }
  81
  82 static int mem_ap_halt(struct target *target)
  83 {
  84         LOG_DEBUG("%s", __func__);
  85         target->state = TARGET_HALTED;
  86         return ERROR_OK;
  87 }
  88
  89 static int mem_ap_resume(struct target *target, int current, target_addr_t address,
  90                 int handle_breakpoints, int debug_execution)
  91 {
  92         LOG_DEBUG("%s", __func__);
  93         target->state = TARGET_RUNNING;
  94         return ERROR_OK;
  95 }
  96
  97 static int mem_ap_step(struct target *target, int current, target_addr_t address,
  98                                 int handle_breakpoints)
  99 {
 100         LOG_DEBUG("%s", __func__);
 101         target->state = TARGET_HALTED;
 102         return ERROR_OK;
 103 }
 104
 105 static int mem_ap_assert_reset(struct target *target)
 106 {
 107         target->state = TARGET_RESET;
 108
 109         LOG_DEBUG("%s", __func__);
 110         return ERROR_OK;
 111 }
 112
 113 static int mem_ap_examine(struct target *target)
 114 {
 115         struct mem_ap *mem_ap = target->arch_info;
 116
 117         if (!target_was_examined(target)) {
 118                 mem_ap->ap = dap_ap(mem_ap->arm.dap, mem_ap->ap_num);
 119                 target_set_examined(target);
 120                 target->state = TARGET_UNKNOWN;
 121                 return mem_ap_init(mem_ap->ap);
 122         }
 123
 124         return ERROR_OK;
 125 }
 126
 127 static int mem_ap_deassert_reset(struct target *target)
 128 {
 129         if (target->reset_halt)
 130                 target->state = TARGET_HALTED;
 131         else
 132                 target->state = TARGET_RUNNING;
 133
 134         LOG_DEBUG("%s", __func__);
 135         return ERROR_OK;
 136 }
 137
 138 static int mem_ap_read_memory(struct target *target, target_addr_t address,
 139                                uint32_t size, uint32_t count, uint8_t *buffer)
 140 {
 141         struct mem_ap *mem_ap = target->arch_info;
 142
 143         LOG_DEBUG("Reading memory at physical address 0x" TARGET_ADDR_FMT
 144                   "; size %" PRId32 "; count %" PRId32, address, size, count);
 145
 146         if (count == 0 || buffer == NULL)
 147                 return ERROR_COMMAND_SYNTAX_ERROR;
 148
 149         return mem_ap_read_buf(mem_ap->ap, buffer, size, count, address);
 150 }
 151
 152 static int mem_ap_write_memory(struct target *target, target_addr_t address,
 153                                 uint32_t size, uint32_t count,
 154                                 const uint8_t *buffer)
 155 {
 156         struct mem_ap *mem_ap = target->arch_info;
 157
 158         LOG_DEBUG("Writing memory at physical address 0x" TARGET_ADDR_FMT
 159                   "; size %" PRId32 "; count %" PRId32, address, size, count);
 160
 161         if (count == 0 || buffer == NULL)
 162                 return ERROR_COMMAND_SYNTAX_ERROR;
 163
 164         return mem_ap_write_buf(mem_ap->ap, buffer, size, count, address);
 165 }
 166
 167 struct target_type mem_ap_target = {
 168         .name = "mem_ap",
 169
 170         .target_create = mem_ap_target_create,
 171         .init_target = mem_ap_init_target,
 172         .examine = mem_ap_examine,
 173         .target_jim_configure = adiv5_jim_configure,
 174
 175         .poll = mem_ap_poll,
 176         .arch_state = mem_ap_arch_state,
 177
 178         .halt = mem_ap_halt,
 179         .resume = mem_ap_resume,
 180         .step = mem_ap_step,
 181
 182         .assert_reset = mem_ap_assert_reset,
 183         .deassert_reset = mem_ap_deassert_reset,
 184
 185         .read_memory = mem_ap_read_memory,
 186         .write_memory = mem_ap_write_memory,
 187 };