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         .prepare_reset_halt = arm7_9_prepare_reset_halt,
  67
  68         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  69
  70         .read_memory = arm7_9_read_memory,
  71         .write_memory = arm7_9_write_memory,
  72         .bulk_write_memory = arm7_9_bulk_write_memory,
  73
  74         .run_algorithm = armv4_5_run_algorithm,
  75
  76         .add_breakpoint = arm7_9_add_breakpoint,
  77         .remove_breakpoint = arm7_9_remove_breakpoint,
  78         .add_watchpoint = arm7_9_add_watchpoint,
  79         .remove_watchpoint = arm7_9_remove_watchpoint,
  80
  81         .register_commands = arm966e_register_commands,
  82         .target_command = arm966e_target_command,
  83         .init_target = arm966e_init_target,
  84         .quit = arm966e_quit,
  85 };
  86
  87 int arm966e_assert_reset(target_t *target)
  88 {
  89         int retval;
  90
  91         DEBUG("target->state: %s", target_state_strings[target->state]);
  92
  93         if (target->state == TARGET_HALTED || target->state == TARGET_UNKNOWN)
  94         {
  95                 /* assert SRST and TRST */
  96                 /* system would get ouf sync if we didn't reset test-logic, too */
  97                 if ((retval = jtag_add_reset(1, 1)) != ERROR_OK)
  98                 {
  99                         if (retval == ERROR_JTAG_RESET_CANT_SRST)
 100                         {
 101                                 WARNING("can't assert srst");
 102                                 return retval;
 103                         }
 104                         else
 105                         {
 106                                 ERROR("unknown error");
 107                                 exit(-1);
 108                         }
 109                 }
 110                 jtag_add_sleep(5000);
 111                 if ((retval = jtag_add_reset(0, 1)) != ERROR_OK)
 112                 {
 113                         if (retval == ERROR_JTAG_RESET_WOULD_ASSERT_TRST)
 114                         {
 115                                 WARNING("srst resets test logic, too");
 116                                 retval = jtag_add_reset(1, 1);
 117                         }
 118                 }
 119         }
 120         else
 121         {
 122                 if ((retval = jtag_add_reset(0, 1)) != ERROR_OK)
 123                 {
 124                         if (retval == ERROR_JTAG_RESET_WOULD_ASSERT_TRST)
 125                         {
 126                                 WARNING("srst resets test logic, too");
 127                                 retval = jtag_add_reset(1, 1);
 128                         }
 129
 130                         if (retval == ERROR_JTAG_RESET_CANT_SRST)
 131                         {
 132                                 WARNING("can't assert srst");
 133                                 return retval;
 134                         }
 135                         else if (retval != ERROR_OK)
 136                         {
 137                                 ERROR("unknown error");
 138                                 exit(-1);
 139                         }
 140                 }
 141         }
 142
 143         target->state = TARGET_RESET;
 144         jtag_add_sleep(50000);
 145
 146         armv4_5_invalidate_core_regs(target);
 147
 148         return ERROR_OK;
 149 }
 150
 151 int arm966e_deassert_reset(target_t *target)
 152 {
 153         arm7_9_deassert_reset( target );
 154
 155         return ERROR_OK;
 156 }
 157
 158 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 159 {
 160         arm9tdmi_init_target(cmd_ctx, target);
 161
 162         return ERROR_OK;
 163 }
 164
 165 int arm966e_quit(void)
 166 {
 167
 168         return ERROR_OK;
 169 }
 170
 171 int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, int chain_pos, char *variant)
 172 {
 173         arm9tdmi_common_t *arm9tdmi = &arm966e->arm9tdmi_common;
 174         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 175
 176         arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
 177
 178         arm9tdmi->arch_info = arm966e;
 179         arm966e->common_magic = ARM966E_COMMON_MAGIC;
 180
 181         /* The ARM966E-S implements the ARMv5TE architecture which
 182          * has the BKPT instruction, so we don't have to use a watchpoint comparator
 183          */
 184         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
 185         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
 186
 187         arm7_9->sw_bkpts_use_wp = 0;
 188         arm7_9->sw_bkpts_enabled = 1;
 189
 190         return ERROR_OK;
 191 }
 192
 193 int arm966e_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
 194 {
 195         int chain_pos;
 196         char *variant = NULL;
 197         arm966e_common_t *arm966e = malloc(sizeof(arm966e_common_t));
 198
 199         if (argc < 4)
 200         {
 201                 ERROR("'target arm966e' requires at least one additional argument");
 202                 exit(-1);
 203         }
 204
 205         chain_pos = strtoul(args[3], NULL, 0);
 206
 207         if (argc >= 5)
 208                 variant = args[4];
 209
 210         DEBUG("chain_pos: %i, variant: %s", chain_pos, variant);
 211
 212         arm966e_init_arch_info(target, arm966e, chain_pos, variant);
 213
 214         return ERROR_OK;
 215 }
 216
 217 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)
 218 {
 219         armv4_5_common_t *armv4_5 = target->arch_info;
 220         arm7_9_common_t *arm7_9;
 221         arm9tdmi_common_t *arm9tdmi;
 222         arm966e_common_t *arm966e;
 223
 224         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 225         {
 226                 return -1;
 227         }
 228
 229         arm7_9 = armv4_5->arch_info;
 230         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 231         {
 232                 return -1;
 233         }
 234
 235         arm9tdmi = arm7_9->arch_info;
 236         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 237         {
 238                 return -1;
 239         }
 240
 241         arm966e = arm9tdmi->arch_info;
 242         if (arm966e->common_magic != ARM966E_COMMON_MAGIC)
 243         {
 244                 return -1;
 245         }
 246
 247         *armv4_5_p = armv4_5;
 248         *arm7_9_p = arm7_9;
 249         *arm9tdmi_p = arm9tdmi;
 250         *arm966e_p = arm966e;
 251
 252         return ERROR_OK;
 253 }
 254
 255 int arm966e_read_cp15(target_t *target, int reg_addr, u32 *value)
 256 {
 257         armv4_5_common_t *armv4_5 = target->arch_info;
 258         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 259         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 260         scan_field_t fields[3];
 261         u8 reg_addr_buf = reg_addr & 0x3f;
 262         u8 nr_w_buf = 0;
 263
 264         jtag_add_end_state(TAP_RTI);
 265         arm_jtag_scann(jtag_info, 0xf);
 266         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 267
 268         fields[0].device = jtag_info->chain_pos;
 269         fields[0].num_bits = 32;
 270         fields[0].out_value = NULL;
 271         fields[0].out_mask = NULL;
 272         fields[0].in_value = NULL;
 273         fields[0].in_check_value = NULL;
 274         fields[0].in_check_mask = NULL;
 275         fields[0].in_handler = NULL;
 276         fields[0].in_handler_priv = NULL;
 277
 278         fields[1].device = jtag_info->chain_pos;
 279         fields[1].num_bits = 6;
 280         fields[1].out_value = &reg_addr_buf;
 281         fields[1].out_mask = NULL;
 282         fields[1].in_value = NULL;
 283         fields[1].in_check_value = NULL;
 284         fields[1].in_check_mask = NULL;
 285         fields[1].in_handler = NULL;
 286         fields[1].in_handler_priv = NULL;
 287
 288         fields[2].device = jtag_info->chain_pos;
 289         fields[2].num_bits = 1;
 290         fields[2].out_value = &nr_w_buf;
 291         fields[2].out_mask = NULL;
 292         fields[2].in_value = NULL;
 293         fields[2].in_check_value = NULL;
 294         fields[2].in_check_mask = NULL;
 295         fields[2].in_handler = NULL;
 296         fields[2].in_handler_priv = NULL;
 297
 298         jtag_add_dr_scan(3, fields, -1, NULL);
 299
 300         fields[0].in_value = (u8*)value;
 301
 302         jtag_add_dr_scan(3, fields, -1, NULL);
 303
 304         return ERROR_OK;
 305 }
 306
 307 int arm966e_write_cp15(target_t *target, int reg_addr, u32 value)
 308 {
 309         armv4_5_common_t *armv4_5 = target->arch_info;
 310         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 311         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 312         scan_field_t fields[3];
 313         u8 reg_addr_buf = reg_addr & 0x3f;
 314         u8 nr_w_buf = 1;
 315
 316         jtag_add_end_state(TAP_RTI);
 317         arm_jtag_scann(jtag_info, 0xf);
 318         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 319
 320         fields[0].device = jtag_info->chain_pos;
 321         fields[0].num_bits = 32;
 322         fields[0].out_value = (u8*)&value;
 323         fields[0].out_mask = NULL;
 324         fields[0].in_value = NULL;
 325         fields[0].in_check_value = NULL;
 326         fields[0].in_check_mask = NULL;
 327         fields[0].in_handler = NULL;
 328         fields[0].in_handler_priv = NULL;
 329
 330         fields[1].device = jtag_info->chain_pos;
 331         fields[1].num_bits = 6;
 332         fields[1].out_value = &reg_addr_buf;
 333         fields[1].out_mask = NULL;
 334         fields[1].in_value = NULL;
 335         fields[1].in_check_value = NULL;
 336         fields[1].in_check_mask = NULL;
 337         fields[1].in_handler = NULL;
 338         fields[1].in_handler_priv = NULL;
 339
 340         fields[2].device = jtag_info->chain_pos;
 341         fields[2].num_bits = 1;
 342         fields[2].out_value = &nr_w_buf;
 343         fields[2].out_mask = NULL;
 344         fields[2].in_value = NULL;
 345         fields[2].in_check_value = NULL;
 346         fields[2].in_check_mask = NULL;
 347         fields[2].in_handler = NULL;
 348         fields[2].in_handler_priv = NULL;
 349
 350         jtag_add_dr_scan(3, fields, -1, NULL);
 351
 352         return ERROR_OK;
 353 }
 354
 355 int arm966e_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 356 {
 357         int retval;
 358         target_t *target = get_current_target(cmd_ctx);
 359         armv4_5_common_t *armv4_5;
 360         arm7_9_common_t *arm7_9;
 361         arm9tdmi_common_t *arm9tdmi;
 362         arm966e_common_t *arm966e;
 363         arm_jtag_t *jtag_info;
 364
 365         if (arm966e_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm966e) != ERROR_OK)
 366         {
 367                 command_print(cmd_ctx, "current target isn't an ARM966e target");
 368                 return ERROR_OK;
 369         }
 370
 371         jtag_info = &arm7_9->jtag_info;
 372
 373         if (target->state != TARGET_HALTED)
 374         {
 375                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 376                 return ERROR_OK;
 377         }
 378
 379         /* one or more argument, access a single register (write if second argument is given */
 380         if (argc >= 1)
 381         {
 382                 int address = strtoul(args[0], NULL, 0);
 383
 384                 if (argc == 1)
 385                 {
 386                         u32 value;
 387                         if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
 388                         {
 389                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 390                                 return ERROR_OK;
 391                         }
 392                         jtag_execute_queue();
 393
 394                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 395                 }
 396                 else if (argc == 2)
 397                 {
 398                         u32 value = strtoul(args[1], NULL, 0);
 399                         if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
 400                         {
 401                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 402                                 return ERROR_OK;
 403                         }
 404                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 405                 }
 406         }
 407
 408         return ERROR_OK;
 409 }
 410
 411 int arm966e_register_commands(struct command_context_s *cmd_ctx)
 412 {
 413         int retval;
 414         command_t *arm966e_cmd;
 415
 416         retval = arm7_9_register_commands(cmd_ctx);
 417         arm966e_cmd = register_command(cmd_ctx, NULL, "arm966e", NULL, COMMAND_ANY, "arm966e specific commands");
 418         register_command(cmd_ctx, arm966e_cmd, "cp15", arm966e_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <num> [value]");
 419
 420         return ERROR_OK;
 421 }