src/target/arm966e.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "arm966e.h"
  25
  26 #include "arm7_9_common.h"
  27 #include "register.h"
  28 #include "target.h"
  29 #include "armv4_5.h"
  30 #include "embeddedice.h"
  31 #include "log.h"
  32 #include "jtag.h"
  33 #include "arm_jtag.h"
  34
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #if 0
  39 #define _DEBUG_INSTRUCTION_EXECUTION_
  40 #endif
  41
  42 /* cli handling */
  43 int arm966e_register_commands(struct command_context_s *cmd_ctx);
  44
  45 /* forward declarations */
  46 int arm966e_deassert_reset(target_t *target);
  47 int arm966e_assert_reset(target_t *target);
  48 int arm966e_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
  49 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  50 int arm966e_quit(void);
  51
  52 target_type_t arm966e_target =
  53 {
  54         .name = "arm966e",
  55
  56         .poll = arm7_9_poll,
  57         .arch_state = armv4_5_arch_state,
  58
  59         .halt = arm7_9_halt,
  60         .resume = arm7_9_resume,
  61         .step = arm7_9_step,
  62
  63         .assert_reset = arm966e_assert_reset,
  64         .deassert_reset = arm966e_deassert_reset,
  65         .soft_reset_halt = arm7_9_soft_reset_halt,
  66
  67         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  68
  69         .read_memory = arm7_9_read_memory,
  70         .write_memory = arm7_9_write_memory,
  71         .bulk_write_memory = arm7_9_bulk_write_memory,
  72
  73         .run_algorithm = armv4_5_run_algorithm,
  74
  75         .add_breakpoint = arm7_9_add_breakpoint,
  76         .remove_breakpoint = arm7_9_remove_breakpoint,
  77         .add_watchpoint = arm7_9_add_watchpoint,
  78         .remove_watchpoint = arm7_9_remove_watchpoint,
  79
  80         .register_commands = arm966e_register_commands,
  81         .target_command = arm966e_target_command,
  82         .init_target = arm966e_init_target,
  83         .quit = arm966e_quit,
  84 };
  85
  86 int arm966e_assert_reset(target_t *target)
  87 {
  88         armv4_5_common_t *armv4_5 = target->arch_info;
  89         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
  90         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
  91         arm966e_common_t *arm966e = arm9tdmi->arch_info;
  92         reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
  93         int retval;
  94         int trst_asserted_with_srt = 0;
  95
  96         arm966e->monitor_mode_set = 1;
  97
  98         DEBUG("target->state: %s", target_state_strings[target->state]);
  99
 100         if (target->state == TARGET_HALTED || target->state == TARGET_UNKNOWN)
 101         {
 102                 /* assert SRST and TRST */
 103                 /* system would get ouf sync if we didn't reset test-logic, too */
 104                 if ((retval = jtag_add_reset(1, 1)) != ERROR_OK)
 105                 {
 106                         if (retval == ERROR_JTAG_RESET_CANT_SRST)
 107                         {
 108                                 WARNING("can't assert srst");
 109                                 return retval;
 110                         }
 111                         else
 112                         {
 113                                 ERROR("unknown error");
 114                                 exit(-1);
 115                         }
 116                 }
 117                 jtag_add_sleep(5000);
 118                 if ((retval = jtag_add_reset(0, 1)) != ERROR_OK)
 119                 {
 120                         if (retval == ERROR_JTAG_RESET_WOULD_ASSERT_TRST)
 121                         {
 122                                 WARNING("srst resets test logic, too");
 123                                 retval = jtag_add_reset(1, 1);
 124                                 trst_asserted_with_srt = 1;
 125                         }
 126                 }
 127         }
 128         else
 129         {
 130                 if ((retval = jtag_add_reset(0, 1)) != ERROR_OK)
 131                 {
 132                         if (retval == ERROR_JTAG_RESET_WOULD_ASSERT_TRST)
 133                         {
 134                                 WARNING("srst resets test logic, too");
 135                                 retval = jtag_add_reset(1, 1);
 136                                 trst_asserted_with_srt = 1;
 137                         }
 138
 139                         if (retval == ERROR_JTAG_RESET_CANT_SRST)
 140                         {
 141                                 WARNING("can't assert srst");
 142                                 return retval;
 143                         }
 144                         else if (retval != ERROR_OK)
 145                         {
 146                                 ERROR("unknown error");
 147                                 exit(-1);
 148                         }
 149                 }
 150         }
 151
 152         target->state = TARGET_RESET;
 153         jtag_add_sleep(50000);
 154
 155         armv4_5_invalidate_core_regs(target);
 156
 157         if( trst_asserted_with_srt == 0 )
 158         {
 159                 DEBUG("monitor mode needs clearing");
 160
 161                 /* arm9e monitor mode enabled at reset */
 162                 embeddedice_read_reg(dbg_ctrl);
 163                 jtag_execute_queue();
 164
 165                 if(buf_get_u32(dbg_ctrl->value, EICE_DBG_CONTROL_MONEN, 1))
 166                 {
 167                         buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_MONEN, 1, 0);
 168                         embeddedice_store_reg(dbg_ctrl);
 169                         DEBUG("monitor mode disabled");
 170                 }
 171                 arm966e->monitor_mode_set = 0;
 172         }
 173
 174         return ERROR_OK;
 175 }
 176
 177 int arm966e_deassert_reset(target_t *target)
 178 {
 179         armv4_5_common_t *armv4_5 = target->arch_info;
 180         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 181         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 182         arm966e_common_t *arm966e = arm9tdmi->arch_info;
 183         reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
 184
 185         arm7_9_deassert_reset( target );
 186
 187         if( arm966e->monitor_mode_set == 1 )
 188         {
 189                 DEBUG("monitor mode needs clearing");
 190
 191                 /* arm9e monitor mode enabled at reset */
 192                 embeddedice_read_reg(dbg_ctrl);
 193                 jtag_execute_queue();
 194
 195                 if(buf_get_u32(dbg_ctrl->value, EICE_DBG_CONTROL_MONEN, 1))
 196                 {
 197                         buf_set_u32(dbg_ctrl->value, EICE_DBG_CONTROL_MONEN, 1, 0);
 198                         embeddedice_store_reg(dbg_ctrl);
 199                         arm966e->monitor_mode_set = 0;
 200                         DEBUG("monitor mode disabled");
 201                 }
 202         }
 203
 204         return ERROR_OK;
 205 }
 206
 207 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 208 {
 209         arm9tdmi_init_target(cmd_ctx, target);
 210
 211         return ERROR_OK;
 212 }
 213
 214 int arm966e_quit(void)
 215 {
 216
 217         return ERROR_OK;
 218 }
 219
 220 int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, int chain_pos, char *variant)
 221 {
 222         arm9tdmi_common_t *arm9tdmi = &arm966e->arm9tdmi_common;
 223
 224         arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
 225
 226         arm9tdmi->arch_info = arm966e;
 227         arm966e->common_magic = ARM966E_COMMON_MAGIC;
 228
 229         arm9tdmi->has_single_step = 0;
 230         arm9tdmi->has_monitor_mode = 1;
 231
 232         return ERROR_OK;
 233 }
 234
 235 int arm966e_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
 236 {
 237         int chain_pos;
 238         char *variant = NULL;
 239         arm966e_common_t *arm966e = malloc(sizeof(arm966e_common_t));
 240
 241         if (argc < 4)
 242         {
 243                 ERROR("'target arm966e' requires at least one additional argument");
 244                 exit(-1);
 245         }
 246
 247         chain_pos = strtoul(args[3], NULL, 0);
 248
 249         if (argc >= 5)
 250                 variant = args[4];
 251
 252         DEBUG("chain_pos: %i, variant: %s", chain_pos, variant);
 253
 254         arm966e_init_arch_info(target, arm966e, chain_pos, variant);
 255
 256         return ERROR_OK;
 257 }
 258
 259 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)
 260 {
 261         armv4_5_common_t *armv4_5 = target->arch_info;
 262         arm7_9_common_t *arm7_9;
 263         arm9tdmi_common_t *arm9tdmi;
 264         arm966e_common_t *arm966e;
 265
 266         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 267         {
 268                 return -1;
 269         }
 270
 271         arm7_9 = armv4_5->arch_info;
 272         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 273         {
 274                 return -1;
 275         }
 276
 277         arm9tdmi = arm7_9->arch_info;
 278         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 279         {
 280                 return -1;
 281         }
 282
 283         arm966e = arm9tdmi->arch_info;
 284         if (arm966e->common_magic != ARM966E_COMMON_MAGIC)
 285         {
 286                 return -1;
 287         }
 288
 289         *armv4_5_p = armv4_5;
 290         *arm7_9_p = arm7_9;
 291         *arm9tdmi_p = arm9tdmi;
 292         *arm966e_p = arm966e;
 293
 294         return ERROR_OK;
 295 }
 296
 297 int arm966e_read_cp15(target_t *target, int reg_addr, u32 *value)
 298 {
 299         armv4_5_common_t *armv4_5 = target->arch_info;
 300         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 301         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 302         scan_field_t fields[3];
 303         u8 reg_addr_buf = reg_addr & 0x3f;
 304         u8 nr_w_buf = 0;
 305
 306         jtag_add_end_state(TAP_RTI);
 307         arm_jtag_scann(jtag_info, 0xf);
 308         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr);
 309
 310         fields[0].device = jtag_info->chain_pos;
 311         fields[0].num_bits = 32;
 312         fields[0].out_value = NULL;
 313         fields[0].out_mask = NULL;
 314         fields[0].in_value = NULL;
 315         fields[0].in_check_value = NULL;
 316         fields[0].in_check_mask = NULL;
 317         fields[0].in_handler = NULL;
 318         fields[0].in_handler_priv = NULL;
 319
 320         fields[1].device = jtag_info->chain_pos;
 321         fields[1].num_bits = 6;
 322         fields[1].out_value = &reg_addr_buf;
 323         fields[1].out_mask = NULL;
 324         fields[1].in_value = NULL;
 325         fields[1].in_check_value = NULL;
 326         fields[1].in_check_mask = NULL;
 327         fields[1].in_handler = NULL;
 328         fields[1].in_handler_priv = NULL;
 329
 330         fields[2].device = jtag_info->chain_pos;
 331         fields[2].num_bits = 1;
 332         fields[2].out_value = &nr_w_buf;
 333         fields[2].out_mask = NULL;
 334         fields[2].in_value = NULL;
 335         fields[2].in_check_value = NULL;
 336         fields[2].in_check_mask = NULL;
 337         fields[2].in_handler = NULL;
 338         fields[2].in_handler_priv = NULL;
 339
 340         jtag_add_dr_scan(3, fields, -1);
 341
 342         fields[0].in_value = (u8*)value;
 343
 344         jtag_add_dr_scan(3, fields, -1);
 345
 346         return ERROR_OK;
 347 }
 348
 349 int arm966e_write_cp15(target_t *target, int reg_addr, u32 value)
 350 {
 351         armv4_5_common_t *armv4_5 = target->arch_info;
 352         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 353         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 354         scan_field_t fields[3];
 355         u8 reg_addr_buf = reg_addr & 0x3f;
 356         u8 nr_w_buf = 1;
 357
 358         jtag_add_end_state(TAP_RTI);
 359         arm_jtag_scann(jtag_info, 0xf);
 360         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr);
 361
 362         fields[0].device = jtag_info->chain_pos;
 363         fields[0].num_bits = 32;
 364         fields[0].out_value = (u8*)&value;
 365         fields[0].out_mask = NULL;
 366         fields[0].in_value = NULL;
 367         fields[0].in_check_value = NULL;
 368         fields[0].in_check_mask = NULL;
 369         fields[0].in_handler = NULL;
 370         fields[0].in_handler_priv = NULL;
 371
 372         fields[1].device = jtag_info->chain_pos;
 373         fields[1].num_bits = 6;
 374         fields[1].out_value = &reg_addr_buf;
 375         fields[1].out_mask = NULL;
 376         fields[1].in_value = NULL;
 377         fields[1].in_check_value = NULL;
 378         fields[1].in_check_mask = NULL;
 379         fields[1].in_handler = NULL;
 380         fields[1].in_handler_priv = NULL;
 381
 382         fields[2].device = jtag_info->chain_pos;
 383         fields[2].num_bits = 1;
 384         fields[2].out_value = &nr_w_buf;
 385         fields[2].out_mask = NULL;
 386         fields[2].in_value = NULL;
 387         fields[2].in_check_value = NULL;
 388         fields[2].in_check_mask = NULL;
 389         fields[2].in_handler = NULL;
 390         fields[2].in_handler_priv = NULL;
 391
 392         jtag_add_dr_scan(3, fields, -1);
 393
 394         return ERROR_OK;
 395 }
 396
 397 int arm966e_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 398 {
 399         int retval;
 400         target_t *target = get_current_target(cmd_ctx);
 401         armv4_5_common_t *armv4_5;
 402         arm7_9_common_t *arm7_9;
 403         arm9tdmi_common_t *arm9tdmi;
 404         arm966e_common_t *arm966e;
 405         arm_jtag_t *jtag_info;
 406
 407         if (arm966e_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm966e) != ERROR_OK)
 408         {
 409                 command_print(cmd_ctx, "current target isn't an ARM966e target");
 410                 return ERROR_OK;
 411         }
 412
 413         jtag_info = &arm7_9->jtag_info;
 414
 415         if (target->state != TARGET_HALTED)
 416         {
 417                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 418                 return ERROR_OK;
 419         }
 420
 421         /* one or more argument, access a single register (write if second argument is given */
 422         if (argc >= 1)
 423         {
 424                 int address = strtoul(args[0], NULL, 0);
 425
 426                 if (argc == 1)
 427                 {
 428                         u32 value;
 429                         if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
 430                         {
 431                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 432                                 return ERROR_OK;
 433                         }
 434                         jtag_execute_queue();
 435
 436                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 437                 }
 438                 else if (argc == 2)
 439                 {
 440                         u32 value = strtoul(args[1], NULL, 0);
 441                         if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
 442                         {
 443                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 444                                 return ERROR_OK;
 445                         }
 446                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 447                 }
 448         }
 449
 450         return ERROR_OK;
 451 }
 452
 453 int arm966e_register_commands(struct command_context_s *cmd_ctx)
 454 {
 455         int retval;
 456         command_t *arm966e_cmd;
 457
 458         retval = arm7_9_register_commands(cmd_ctx);
 459         arm966e_cmd = register_command(cmd_ctx, NULL, "arm966e", NULL, COMMAND_ANY, "arm966e specific commands");
 460         register_command(cmd_ctx, arm966e_cmd, "cp15", arm966e_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <num> [value]");
 461
 462         return ERROR_OK;
 463 }