src/target/arm966e.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2008 by Spencer Oliver                                  *
   6  *   spen@spen-soft.co.uk                                                  *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include "arm966e.h"
  28 #include "target_type.h"
  29
  30
  31 #if 0
  32 #define _DEBUG_INSTRUCTION_EXECUTION_
  33 #endif
  34
  35 /* forward declarations */
  36 int arm966e_target_create(struct target_s *target, Jim_Interp *interp);
  37 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  38 int arm966e_quit(void);
  39
  40 target_type_t arm966e_target =
  41 {
  42         .name = "arm966e",
  43
  44         .poll = arm7_9_poll,
  45         .arch_state = armv4_5_arch_state,
  46
  47         .target_request_data = arm7_9_target_request_data,
  48
  49         .halt = arm7_9_halt,
  50         .resume = arm7_9_resume,
  51         .step = arm7_9_step,
  52
  53         .assert_reset = arm7_9_assert_reset,
  54         .deassert_reset = arm7_9_deassert_reset,
  55         .soft_reset_halt = arm7_9_soft_reset_halt,
  56
  57         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  58
  59         .read_memory = arm7_9_read_memory,
  60         .write_memory = arm7_9_write_memory,
  61         .bulk_write_memory = arm7_9_bulk_write_memory,
  62         .checksum_memory = arm7_9_checksum_memory,
  63         .blank_check_memory = arm7_9_blank_check_memory,
  64
  65         .run_algorithm = armv4_5_run_algorithm,
  66
  67         .add_breakpoint = arm7_9_add_breakpoint,
  68         .remove_breakpoint = arm7_9_remove_breakpoint,
  69         .add_watchpoint = arm7_9_add_watchpoint,
  70         .remove_watchpoint = arm7_9_remove_watchpoint,
  71
  72         .register_commands = arm966e_register_commands,
  73         .target_create = arm966e_target_create,
  74         .init_target = arm966e_init_target,
  75         .examine = arm9tdmi_examine,
  76         .quit = arm966e_quit,
  77 };
  78
  79 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
  80 {
  81         arm9tdmi_init_target(cmd_ctx, target);
  82
  83         return ERROR_OK;
  84 }
  85
  86 int arm966e_quit(void)
  87 {
  88         return ERROR_OK;
  89 }
  90
  91 int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, jtag_tap_t *tap)
  92 {
  93         arm9tdmi_common_t *arm9tdmi = &arm966e->arm9tdmi_common;
  94         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
  95
  96         arm9tdmi_init_arch_info(target, arm9tdmi, tap);
  97
  98         arm9tdmi->arch_info = arm966e;
  99         arm966e->common_magic = ARM966E_COMMON_MAGIC;
 100
 101         /* The ARM966E-S implements the ARMv5TE architecture which
 102          * has the BKPT instruction, so we don't have to use a watchpoint comparator
 103          */
 104         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
 105         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
 106
 107         return ERROR_OK;
 108 }
 109
 110 int arm966e_target_create(struct target_s *target, Jim_Interp *interp)
 111 {
 112         arm966e_common_t *arm966e = calloc(1,sizeof(arm966e_common_t));
 113
 114         arm966e_init_arch_info(target, arm966e, target->tap);
 115
 116         return ERROR_OK;
 117 }
 118
 119 int arm966e_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, arm7_9_common_t **arm7_9_p, arm9tdmi_common_t **arm9tdmi_p, arm966e_common_t **arm966e_p)
 120 {
 121         armv4_5_common_t *armv4_5 = target->arch_info;
 122         arm7_9_common_t *arm7_9;
 123         arm9tdmi_common_t *arm9tdmi;
 124         arm966e_common_t *arm966e;
 125
 126         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 127         {
 128                 return -1;
 129         }
 130
 131         arm7_9 = armv4_5->arch_info;
 132         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 133         {
 134                 return -1;
 135         }
 136
 137         arm9tdmi = arm7_9->arch_info;
 138         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 139         {
 140                 return -1;
 141         }
 142
 143         arm966e = arm9tdmi->arch_info;
 144         if (arm966e->common_magic != ARM966E_COMMON_MAGIC)
 145         {
 146                 return -1;
 147         }
 148
 149         *armv4_5_p = armv4_5;
 150         *arm7_9_p = arm7_9;
 151         *arm9tdmi_p = arm9tdmi;
 152         *arm966e_p = arm966e;
 153
 154         return ERROR_OK;
 155 }
 156
 157 int arm966e_read_cp15(target_t *target, int reg_addr, uint32_t *value)
 158 {
 159         int retval = ERROR_OK;
 160         armv4_5_common_t *armv4_5 = target->arch_info;
 161         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 162         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 163         scan_field_t fields[3];
 164         uint8_t reg_addr_buf = reg_addr & 0x3f;
 165         uint8_t nr_w_buf = 0;
 166
 167         jtag_set_end_state(TAP_IDLE);
 168         if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 169         {
 170                 return retval;
 171         }
 172         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 173
 174         fields[0].tap = jtag_info->tap;
 175         fields[0].num_bits = 32;
 176         fields[0].out_value = NULL;
 177         fields[0].in_value = NULL;
 178
 179         fields[1].tap = jtag_info->tap;
 180         fields[1].num_bits = 6;
 181         fields[1].out_value = &reg_addr_buf;
 182         fields[1].in_value = NULL;
 183
 184         fields[2].tap = jtag_info->tap;
 185         fields[2].num_bits = 1;
 186         fields[2].out_value = &nr_w_buf;
 187         fields[2].in_value = NULL;
 188
 189         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 190
 191         fields[1].in_value = (uint8_t *)value;
 192
 193         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 194
 195         jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)value);
 196
 197
 198 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 199         if ((retval = jtag_execute_queue()) != ERROR_OK)
 200         {
 201                 return retval;
 202         }
 203         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
 204 #endif
 205
 206         return ERROR_OK;
 207 }
 208
 209 int arm966e_write_cp15(target_t *target, int reg_addr, uint32_t value)
 210 {
 211         int retval = ERROR_OK;
 212         armv4_5_common_t *armv4_5 = target->arch_info;
 213         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 214         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 215         scan_field_t fields[3];
 216         uint8_t reg_addr_buf = reg_addr & 0x3f;
 217         uint8_t nr_w_buf = 1;
 218         uint8_t value_buf[4];
 219
 220         buf_set_u32(value_buf, 0, 32, value);
 221
 222         jtag_set_end_state(TAP_IDLE);
 223         if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 224         {
 225                 return retval;
 226         }
 227         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 228
 229         fields[0].tap = jtag_info->tap;
 230         fields[0].num_bits = 32;
 231         fields[0].out_value = value_buf;
 232         fields[0].in_value = NULL;
 233
 234         fields[1].tap = jtag_info->tap;
 235         fields[1].num_bits = 6;
 236         fields[1].out_value = &reg_addr_buf;
 237         fields[1].in_value = NULL;
 238
 239         fields[2].tap = jtag_info->tap;
 240         fields[2].num_bits = 1;
 241         fields[2].out_value = &nr_w_buf;
 242         fields[2].in_value = NULL;
 243
 244         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 245
 246 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 247         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
 248 #endif
 249
 250         return ERROR_OK;
 251 }
 252
 253 int arm966e_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 254 {
 255         int retval;
 256         target_t *target = get_current_target(cmd_ctx);
 257         armv4_5_common_t *armv4_5;
 258         arm7_9_common_t *arm7_9;
 259         arm9tdmi_common_t *arm9tdmi;
 260         arm966e_common_t *arm966e;
 261         arm_jtag_t *jtag_info;
 262
 263         if (arm966e_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm966e) != ERROR_OK)
 264         {
 265                 command_print(cmd_ctx, "current target isn't an ARM966e target");
 266                 return ERROR_OK;
 267         }
 268
 269         jtag_info = &arm7_9->jtag_info;
 270
 271         if (target->state != TARGET_HALTED)
 272         {
 273                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 274                 return ERROR_OK;
 275         }
 276
 277         /* one or more argument, access a single register (write if second argument is given */
 278         if (argc >= 1)
 279         {
 280                 int address = strtoul(args[0], NULL, 0);
 281
 282                 if (argc == 1)
 283                 {
 284                         uint32_t value;
 285                         if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
 286                         {
 287                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 288                                 return ERROR_OK;
 289                         }
 290                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 291                         {
 292                                 return retval;
 293                         }
 294
 295                         command_print(cmd_ctx, "%i: %8.8" PRIx32 "", address, value);
 296                 }
 297                 else if (argc == 2)
 298                 {
 299                         uint32_t value = strtoul(args[1], NULL, 0);
 300                         if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
 301                         {
 302                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 303                                 return ERROR_OK;
 304                         }
 305                         command_print(cmd_ctx, "%i: %8.8" PRIx32 "", address, value);
 306                 }
 307         }
 308
 309         return ERROR_OK;
 310 }
 311
 312 int arm966e_register_commands(struct command_context_s *cmd_ctx)
 313 {
 314         int retval;
 315         command_t *arm966e_cmd;
 316
 317         retval = arm9tdmi_register_commands(cmd_ctx);
 318         arm966e_cmd = register_command(cmd_ctx, NULL, "arm966e", NULL, COMMAND_ANY, "arm966e specific commands");
 319         register_command(cmd_ctx, arm966e_cmd, "cp15", arm966e_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <num> [value]");
 320
 321         return retval;
 322 }