src/target/arm926ejs.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 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 "arm926ejs.h"
  25 #include "jtag.h"
  26 #include "log.h"
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #if 1
  32 #define _DEBUG_INSTRUCTION_EXECUTION_
  33 #endif
  34
  35 /* cli handling */
  36 int arm926ejs_register_commands(struct command_context_s *cmd_ctx);
  37
  38 int arm926ejs_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  39 int arm926ejs_handle_cp15i_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  40 int arm926ejs_handle_virt2phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  41 int arm926ejs_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  42 int arm926ejs_handle_md_phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  43 int arm926ejs_handle_mw_phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  44
  45 int arm926ejs_handle_read_cache_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  46 int arm926ejs_handle_read_mmu_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  47
  48 /* forward declarations */
  49 int arm926ejs_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
  50 int arm926ejs_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  51 int arm926ejs_quit();
  52 int arm926ejs_arch_state(struct target_s *target, char *buf, int buf_size);
  53 int arm926ejs_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  54 int arm926ejs_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  55 int arm926ejs_soft_reset_halt(struct target_s *target);
  56
  57 #define ARM926EJS_CP15_ADDR(opcode_1, opcode_2, CRn, CRm) ((opcode_1 << 11) | (opcode_2 << 8) | (CRn << 4) | (CRm << 0))
  58
  59 target_type_t arm926ejs_target =
  60 {
  61         .name = "arm926ejs",
  62
  63         .poll = arm7_9_poll,
  64         .arch_state = arm926ejs_arch_state,
  65
  66         .target_request_data = arm7_9_target_request_data,
  67
  68         .halt = arm7_9_halt,
  69         .resume = arm7_9_resume,
  70         .step = arm7_9_step,
  71
  72         .assert_reset = arm7_9_assert_reset,
  73         .deassert_reset = arm7_9_deassert_reset,
  74         .soft_reset_halt = arm926ejs_soft_reset_halt,
  75         .prepare_reset_halt = arm7_9_prepare_reset_halt,
  76
  77         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  78
  79         .read_memory = arm7_9_read_memory,
  80         .write_memory = arm926ejs_write_memory,
  81         .bulk_write_memory = arm7_9_bulk_write_memory,
  82
  83         .run_algorithm = armv4_5_run_algorithm,
  84
  85         .add_breakpoint = arm7_9_add_breakpoint,
  86         .remove_breakpoint = arm7_9_remove_breakpoint,
  87         .add_watchpoint = arm7_9_add_watchpoint,
  88         .remove_watchpoint = arm7_9_remove_watchpoint,
  89
  90         .register_commands = arm926ejs_register_commands,
  91         .target_command = arm926ejs_target_command,
  92         .init_target = arm926ejs_init_target,
  93         .quit = arm926ejs_quit
  94 };
  95
  96 int arm926ejs_catch_broken_irscan(u8 *in_value, void *priv)
  97 {
  98         /* The ARM926EJ-S' instruction register is 4 bits wide */
  99         *in_value &= 0xf;
 100
 101         if ((*in_value == 0x0f) || (*in_value == 0x00))
 102         {
 103                 DEBUG("caught ARM926EJ-S invalid Capture-IR result after CP15 access");
 104                 return ERROR_OK;
 105         }
 106         else
 107         {
 108                 return ERROR_JTAG_QUEUE_FAILED;
 109         }
 110 }
 111
 112 int arm926ejs_read_cp15(target_t *target, u32 address, u32 *value)
 113 {
 114         armv4_5_common_t *armv4_5 = target->arch_info;
 115         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 116         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 117         scan_field_t fields[4];
 118         u8 address_buf[2];
 119         u8 nr_w_buf = 0;
 120         u8 access = 1;
 121         error_handler_t error_handler;
 122
 123         buf_set_u32(address_buf, 0, 14, address);
 124
 125         jtag_add_end_state(TAP_RTI);
 126         arm_jtag_scann(jtag_info, 0xf);
 127         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 128
 129         fields[0].device = jtag_info->chain_pos;
 130         fields[0].num_bits = 32;
 131         fields[0].out_value = NULL;
 132         fields[0].out_mask = NULL;
 133         fields[0].in_value = NULL;
 134         fields[0].in_check_value = NULL;
 135         fields[0].in_check_mask = NULL;
 136         fields[0].in_handler = NULL;
 137         fields[0].in_handler_priv = NULL;
 138
 139         fields[1].device = jtag_info->chain_pos;
 140         fields[1].num_bits = 1;
 141         fields[1].out_value = &access;
 142         fields[1].out_mask = NULL;
 143         fields[1].in_value = &access;
 144         fields[1].in_check_value = NULL;
 145         fields[1].in_check_mask = NULL;
 146         fields[1].in_handler = NULL;
 147         fields[1].in_handler_priv = NULL;
 148
 149         fields[2].device = jtag_info->chain_pos;
 150         fields[2].num_bits = 14;
 151         fields[2].out_value = address_buf;
 152         fields[2].out_mask = NULL;
 153         fields[2].in_value = NULL;
 154         fields[2].in_check_value = NULL;
 155         fields[2].in_check_mask = NULL;
 156         fields[2].in_handler = NULL;
 157         fields[2].in_handler_priv = NULL;
 158
 159         fields[3].device = jtag_info->chain_pos;
 160         fields[3].num_bits = 1;
 161         fields[3].out_value = &nr_w_buf;
 162         fields[3].out_mask = NULL;
 163         fields[3].in_value = NULL;
 164         fields[3].in_check_value = NULL;
 165         fields[3].in_check_mask = NULL;
 166         fields[3].in_handler = NULL;
 167         fields[3].in_handler_priv = NULL;
 168
 169         jtag_add_dr_scan(4, fields, -1, NULL);
 170
 171         fields[0].in_handler_priv = value;
 172         fields[0].in_handler = arm_jtag_buf_to_u32;
 173
 174         do
 175         {
 176                 /* rescan with NOP, to wait for the access to complete */
 177                 access = 0;
 178                 nr_w_buf = 0;
 179                 jtag_add_dr_scan(4, fields, -1, NULL);
 180                 jtag_execute_queue();
 181         } while (buf_get_u32(&access, 0, 1) != 1);
 182
 183 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 184         DEBUG("addr: 0x%x value: %8.8x", address, *value);
 185 #endif
 186
 187         error_handler.error_handler = arm926ejs_catch_broken_irscan;
 188         error_handler.error_handler_priv = NULL;
 189
 190         arm_jtag_set_instr(jtag_info, 0xc, &error_handler);
 191
 192         return ERROR_OK;
 193 }
 194
 195 int arm926ejs_write_cp15(target_t *target, u32 address, u32 value)
 196 {
 197         armv4_5_common_t *armv4_5 = target->arch_info;
 198         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 199         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 200         scan_field_t fields[4];
 201         u8 value_buf[4];
 202         u8 address_buf[2];
 203         u8 nr_w_buf = 1;
 204         u8 access = 1;
 205         error_handler_t error_handler;
 206
 207         buf_set_u32(address_buf, 0, 14, address);
 208         buf_set_u32(value_buf, 0, 32, value);
 209
 210         jtag_add_end_state(TAP_RTI);
 211         arm_jtag_scann(jtag_info, 0xf);
 212         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 213
 214         fields[0].device = jtag_info->chain_pos;
 215         fields[0].num_bits = 32;
 216         fields[0].out_value = value_buf;
 217         fields[0].out_mask = NULL;
 218         fields[0].in_value = NULL;
 219         fields[0].in_check_value = NULL;
 220         fields[0].in_check_mask = NULL;
 221         fields[0].in_handler = NULL;
 222         fields[0].in_handler_priv = NULL;
 223
 224         fields[1].device = jtag_info->chain_pos;
 225         fields[1].num_bits = 1;
 226         fields[1].out_value = &access;
 227         fields[1].out_mask = NULL;
 228         fields[1].in_value = &access;
 229         fields[1].in_check_value = NULL;
 230         fields[1].in_check_mask = NULL;
 231         fields[1].in_handler = NULL;
 232         fields[1].in_handler_priv = NULL;
 233
 234         fields[2].device = jtag_info->chain_pos;
 235         fields[2].num_bits = 14;
 236         fields[2].out_value = address_buf;
 237         fields[2].out_mask = NULL;
 238         fields[2].in_value = NULL;
 239         fields[2].in_check_value = NULL;
 240         fields[2].in_check_mask = NULL;
 241         fields[2].in_handler = NULL;
 242         fields[2].in_handler_priv = NULL;
 243
 244         fields[3].device = jtag_info->chain_pos;
 245         fields[3].num_bits = 1;
 246         fields[3].out_value = &nr_w_buf;
 247         fields[3].out_mask = NULL;
 248         fields[3].in_value = NULL;
 249         fields[3].in_check_value = NULL;
 250         fields[3].in_check_mask = NULL;
 251         fields[3].in_handler = NULL;
 252         fields[3].in_handler_priv = NULL;
 253
 254         jtag_add_dr_scan(4, fields, -1, NULL);
 255
 256         do
 257         {
 258                 /* rescan with NOP, to wait for the access to complete */
 259                 access = 0;
 260                 nr_w_buf = 0;
 261                 jtag_add_dr_scan(4, fields, -1, NULL);
 262                 jtag_execute_queue();
 263         } while (buf_get_u32(&access, 0, 1) != 1);
 264
 265 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 266         DEBUG("addr: 0x%x value: %8.8x", address, value);
 267 #endif
 268
 269         error_handler.error_handler = arm926ejs_catch_broken_irscan;
 270         error_handler.error_handler_priv = NULL;
 271
 272         arm_jtag_set_instr(jtag_info, 0xf, &error_handler);
 273
 274         return ERROR_OK;
 275 }
 276
 277 int arm926ejs_examine_debug_reason(target_t *target)
 278 {
 279         armv4_5_common_t *armv4_5 = target->arch_info;
 280         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 281         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 282         int debug_reason;
 283         int retval;
 284
 285         embeddedice_read_reg(dbg_stat);
 286         if ((retval = jtag_execute_queue()) != ERROR_OK)
 287                 return retval;
 288
 289         debug_reason = buf_get_u32(dbg_stat->value, 6, 4);
 290
 291         switch (debug_reason)
 292         {
 293                 case 1:
 294                         DEBUG("breakpoint from EICE unit 0");
 295                         target->debug_reason = DBG_REASON_BREAKPOINT;
 296                         break;
 297                 case 2:
 298                         DEBUG("breakpoint from EICE unit 1");
 299                         target->debug_reason = DBG_REASON_BREAKPOINT;
 300                         break;
 301                 case 3:
 302                         DEBUG("soft breakpoint (BKPT instruction)");
 303                         target->debug_reason = DBG_REASON_BREAKPOINT;
 304                         break;
 305                 case 4:
 306                         DEBUG("vector catch breakpoint");
 307                         target->debug_reason = DBG_REASON_BREAKPOINT;
 308                         break;
 309                 case 5:
 310                         DEBUG("external breakpoint");
 311                         target->debug_reason = DBG_REASON_BREAKPOINT;
 312                         break;
 313                 case 6:
 314                         DEBUG("watchpoint from EICE unit 0");
 315                         target->debug_reason = DBG_REASON_WATCHPOINT;
 316                         break;
 317                 case 7:
 318                         DEBUG("watchpoint from EICE unit 1");
 319                         target->debug_reason = DBG_REASON_WATCHPOINT;
 320                         break;
 321                 case 8:
 322                         DEBUG("external watchpoint");
 323                         target->debug_reason = DBG_REASON_WATCHPOINT;
 324                         break;
 325                 case 9:
 326                         DEBUG("internal debug request");
 327                         target->debug_reason = DBG_REASON_DBGRQ;
 328                         break;
 329                 case 10:
 330                         DEBUG("external debug request");
 331                         target->debug_reason = DBG_REASON_DBGRQ;
 332                         break;
 333                 case 11:
 334                         ERROR("BUG: debug re-entry from system speed access shouldn't be handled here");
 335                         break;
 336                 default:
 337                         ERROR("BUG: unknown debug reason: 0x%x", debug_reason);
 338                         target->debug_reason = DBG_REASON_DBGRQ;
 339         }
 340
 341         return ERROR_OK;
 342 }
 343
 344 u32 arm926ejs_get_ttb(target_t *target)
 345 {
 346         int retval;
 347         u32 ttb = 0x0;
 348
 349         if ((retval = arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 2, 0), &ttb)) != ERROR_OK)
 350                 return retval;
 351
 352         return ttb;
 353 }
 354
 355 void arm926ejs_disable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 356 {
 357         u32 cp15_control;
 358
 359         /* read cp15 control register */
 360         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 1, 0), &cp15_control);
 361         jtag_execute_queue();
 362
 363         if (mmu)
 364         {
 365                 /* invalidate TLB */
 366                 arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 8, 7), 0x0);
 367
 368                 cp15_control &= ~0x1U;
 369         }
 370
 371         if (d_u_cache)
 372         {
 373                 u32 debug_override;
 374                 /* read-modify-write CP15 debug override register
 375                  * to enable "test and clean all" */
 376                 arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 15, 0), &debug_override);
 377                 debug_override |= 0x80000;
 378                 arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 15, 0), debug_override);
 379
 380                 /* clean and invalidate DCache */
 381                 arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 7, 5), 0x0);
 382
 383                 /* write CP15 debug override register
 384                  * to disable "test and clean all" */
 385                 debug_override &= ~0x80000;
 386                 arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 15, 0), debug_override);
 387
 388                 cp15_control &= ~0x4U;
 389         }
 390
 391         if (i_cache)
 392         {
 393                 /* invalidate ICache */
 394                 arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 7, 5), 0x0);
 395
 396                 cp15_control &= ~0x1000U;
 397         }
 398
 399         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 1, 0), cp15_control);
 400 }
 401
 402 void arm926ejs_enable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 403 {
 404         u32 cp15_control;
 405
 406         /* read cp15 control register */
 407         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 1, 0), &cp15_control);
 408         jtag_execute_queue();
 409
 410         if (mmu)
 411                 cp15_control |= 0x1U;
 412
 413         if (d_u_cache)
 414                 cp15_control |= 0x4U;
 415
 416         if (i_cache)
 417                 cp15_control |= 0x1000U;
 418
 419         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 1, 0), cp15_control);
 420 }
 421
 422 void arm926ejs_post_debug_entry(target_t *target)
 423 {
 424         armv4_5_common_t *armv4_5 = target->arch_info;
 425         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 426         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 427         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 428
 429         /* examine cp15 control reg */
 430         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 1, 0), &arm926ejs->cp15_control_reg);
 431         jtag_execute_queue();
 432         DEBUG("cp15_control_reg: %8.8x", arm926ejs->cp15_control_reg);
 433
 434         if (arm926ejs->armv4_5_mmu.armv4_5_cache.ctype == -1)
 435         {
 436                 u32 cache_type_reg;
 437                 /* identify caches */
 438                 arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 1, 0, 0), &cache_type_reg);
 439                 jtag_execute_queue();
 440                 armv4_5_identify_cache(cache_type_reg, &arm926ejs->armv4_5_mmu.armv4_5_cache);
 441         }
 442
 443         arm926ejs->armv4_5_mmu.mmu_enabled = (arm926ejs->cp15_control_reg & 0x1U) ? 1 : 0;
 444         arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (arm926ejs->cp15_control_reg & 0x4U) ? 1 : 0;
 445         arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (arm926ejs->cp15_control_reg & 0x1000U) ? 1 : 0;
 446
 447         /* save i/d fault status and address register */
 448         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 5, 0), &arm926ejs->d_fsr);
 449         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 1, 5, 0), &arm926ejs->i_fsr);
 450         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 6, 0), &arm926ejs->d_far);
 451
 452         DEBUG("D FSR: 0x%8.8x, D FAR: 0x%8.8x, I FSR: 0x%8.8x",
 453                 arm926ejs->d_fsr, arm926ejs->d_far, arm926ejs->i_fsr);
 454
 455
 456         u32 cache_dbg_ctrl;
 457
 458         /* read-modify-write CP15 cache debug control register
 459          * to disable I/D-cache linefills and force WT */
 460         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(7, 0, 15, 0), &cache_dbg_ctrl);
 461         cache_dbg_ctrl |= 0x7;
 462         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(7, 0, 15, 0), cache_dbg_ctrl);
 463 }
 464
 465 void arm926ejs_pre_restore_context(target_t *target)
 466 {
 467         armv4_5_common_t *armv4_5 = target->arch_info;
 468         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 469         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 470         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 471
 472         /* restore i/d fault status and address register */
 473         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 5, 0), arm926ejs->d_fsr);
 474         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 1, 5, 0), arm926ejs->i_fsr);
 475         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 6, 0), arm926ejs->d_far);
 476
 477         u32 cache_dbg_ctrl;
 478
 479         /* read-modify-write CP15 cache debug control register
 480          * to reenable I/D-cache linefills and disable WT */
 481         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(7, 0, 15, 0), &cache_dbg_ctrl);
 482         cache_dbg_ctrl &= ~0x7;
 483         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(7, 0, 15, 0), cache_dbg_ctrl);
 484 }
 485
 486 int arm926ejs_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, arm926ejs_common_t **arm926ejs_p)
 487 {
 488         armv4_5_common_t *armv4_5 = target->arch_info;
 489         arm7_9_common_t *arm7_9;
 490         arm9tdmi_common_t *arm9tdmi;
 491         arm926ejs_common_t *arm926ejs;
 492
 493         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 494         {
 495                 return -1;
 496         }
 497
 498         arm7_9 = armv4_5->arch_info;
 499         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 500         {
 501                 return -1;
 502         }
 503
 504         arm9tdmi = arm7_9->arch_info;
 505         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 506         {
 507                 return -1;
 508         }
 509
 510         arm926ejs = arm9tdmi->arch_info;
 511         if (arm926ejs->common_magic != ARM926EJS_COMMON_MAGIC)
 512         {
 513                 return -1;
 514         }
 515
 516         *armv4_5_p = armv4_5;
 517         *arm7_9_p = arm7_9;
 518         *arm9tdmi_p = arm9tdmi;
 519         *arm926ejs_p = arm926ejs;
 520
 521         return ERROR_OK;
 522 }
 523
 524 int arm926ejs_arch_state(struct target_s *target, char *buf, int buf_size)
 525 {
 526         armv4_5_common_t *armv4_5 = target->arch_info;
 527         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 528         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 529         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 530
 531         char *state[] =
 532         {
 533                 "disabled", "enabled"
 534         };
 535
 536         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 537         {
 538                 ERROR("BUG: called for a non-ARMv4/5 target");
 539                 exit(-1);
 540         }
 541
 542         snprintf(buf, buf_size,
 543                         "target halted in %s state due to %s, current mode: %s\n"
 544                         "cpsr: 0x%8.8x pc: 0x%8.8x\n"
 545                         "MMU: %s, D-Cache: %s, I-Cache: %s",
 546                          armv4_5_state_strings[armv4_5->core_state],
 547                          target_debug_reason_strings[target->debug_reason],
 548                          armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
 549                          buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 550                          buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
 551                          state[arm926ejs->armv4_5_mmu.mmu_enabled],
 552                          state[arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
 553                          state[arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
 554
 555         return ERROR_OK;
 556 }
 557
 558 int arm926ejs_soft_reset_halt(struct target_s *target)
 559 {
 560         armv4_5_common_t *armv4_5 = target->arch_info;
 561         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 562         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 563         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 564         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 565
 566         if (target->state == TARGET_RUNNING)
 567         {
 568                 target->type->halt(target);
 569         }
 570
 571         while (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1) == 0)
 572         {
 573                 embeddedice_read_reg(dbg_stat);
 574                 jtag_execute_queue();
 575         }
 576
 577         target->state = TARGET_HALTED;
 578
 579         /* SVC, ARM state, IRQ and FIQ disabled */
 580         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8, 0xd3);
 581         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 582         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 583
 584         /* start fetching from 0x0 */
 585         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, 0x0);
 586         armv4_5->core_cache->reg_list[15].dirty = 1;
 587         armv4_5->core_cache->reg_list[15].valid = 1;
 588
 589         armv4_5->core_mode = ARMV4_5_MODE_SVC;
 590         armv4_5->core_state = ARMV4_5_STATE_ARM;
 591
 592         arm926ejs_disable_mmu_caches(target, 1, 1, 1);
 593         arm926ejs->armv4_5_mmu.mmu_enabled = 0;
 594         arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
 595         arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
 596
 597         target_call_event_callbacks(target, TARGET_EVENT_HALTED);
 598
 599         return ERROR_OK;
 600 }
 601
 602 int arm926ejs_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
 603 {
 604         int retval;
 605         armv4_5_common_t *armv4_5 = target->arch_info;
 606         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 607         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 608         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 609
 610         if ((retval = arm7_9_write_memory(target, address, size, count, buffer)) != ERROR_OK)
 611                 return retval;
 612
 613         /* If ICache is enabled, we have to invalidate affected ICache lines
 614          * the DCache is forced to write-through, so we don't have to clean it here
 615          */
 616         if (arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
 617         {
 618                 if (count <= 1)
 619                 {
 620                         /* invalidate ICache single entry with MVA */
 621                         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 1, 7, 5), address);
 622                 }
 623                 else
 624                 {
 625                         /* invalidate ICache */
 626                         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 7, 5), address);
 627                 }
 628         }
 629
 630         return retval;
 631 }
 632
 633 int arm926ejs_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 634 {
 635         arm9tdmi_init_target(cmd_ctx, target);
 636
 637         return ERROR_OK;
 638
 639 }
 640
 641 int arm926ejs_quit()
 642 {
 643
 644         return ERROR_OK;
 645 }
 646
 647 int arm926ejs_init_arch_info(target_t *target, arm926ejs_common_t *arm926ejs, int chain_pos, char *variant)
 648 {
 649         arm9tdmi_common_t *arm9tdmi = &arm926ejs->arm9tdmi_common;
 650         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 651
 652         /* initialize arm9tdmi specific info (including arm7_9 and armv4_5)
 653          */
 654         arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
 655
 656         arm9tdmi->arch_info = arm926ejs;
 657         arm926ejs->common_magic = ARM926EJS_COMMON_MAGIC;
 658
 659         arm7_9->post_debug_entry = arm926ejs_post_debug_entry;
 660         arm7_9->pre_restore_context = arm926ejs_pre_restore_context;
 661
 662         arm926ejs->armv4_5_mmu.armv4_5_cache.ctype = -1;
 663         arm926ejs->armv4_5_mmu.get_ttb = arm926ejs_get_ttb;
 664         arm926ejs->armv4_5_mmu.read_memory = arm7_9_read_memory;
 665         arm926ejs->armv4_5_mmu.write_memory = arm7_9_write_memory;
 666         arm926ejs->armv4_5_mmu.disable_mmu_caches = arm926ejs_disable_mmu_caches;
 667         arm926ejs->armv4_5_mmu.enable_mmu_caches = arm926ejs_enable_mmu_caches;
 668         arm926ejs->armv4_5_mmu.has_tiny_pages = 1;
 669         arm926ejs->armv4_5_mmu.mmu_enabled = 0;
 670
 671         arm7_9->examine_debug_reason = arm926ejs_examine_debug_reason;
 672
 673         /* The ARM926EJ-S implements the ARMv5TE architecture which
 674          * has the BKPT instruction, so we don't have to use a watchpoint comparator
 675          */
 676         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
 677         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
 678
 679         arm7_9->sw_bkpts_use_wp = 0;
 680         arm7_9->sw_bkpts_enabled = 1;
 681
 682         return ERROR_OK;
 683 }
 684
 685 int arm926ejs_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
 686 {
 687         int chain_pos;
 688         char *variant = NULL;
 689         arm926ejs_common_t *arm926ejs = malloc(sizeof(arm926ejs_common_t));
 690
 691         if (argc < 4)
 692         {
 693                 ERROR("'target arm926ejs' requires at least one additional argument");
 694                 exit(-1);
 695         }
 696
 697         chain_pos = strtoul(args[3], NULL, 0);
 698
 699         if (argc >= 5)
 700                 variant = args[4];
 701
 702         DEBUG("chain_pos: %i, variant: %s", chain_pos, variant);
 703
 704         arm926ejs_init_arch_info(target, arm926ejs, chain_pos, variant);
 705
 706         return ERROR_OK;
 707 }
 708
 709 int arm926ejs_register_commands(struct command_context_s *cmd_ctx)
 710 {
 711         int retval;
 712         command_t *arm926ejs_cmd;
 713
 714
 715         retval = arm9tdmi_register_commands(cmd_ctx);
 716
 717         arm926ejs_cmd = register_command(cmd_ctx, NULL, "arm926ejs", NULL, COMMAND_ANY, "arm926ejs specific commands");
 718
 719         register_command(cmd_ctx, arm926ejs_cmd, "cp15", arm926ejs_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <opcode_1> <opcode_2> <CRn> <CRm> [value]");
 720
 721         register_command(cmd_ctx, arm926ejs_cmd, "cache_info", arm926ejs_handle_cache_info_command, COMMAND_EXEC, "display information about target caches");
 722         register_command(cmd_ctx, arm926ejs_cmd, "virt2phys", arm926ejs_handle_virt2phys_command, COMMAND_EXEC, "translate va to pa <va>");
 723
 724         register_command(cmd_ctx, arm926ejs_cmd, "mdw_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory words <physical addr> [count]");
 725         register_command(cmd_ctx, arm926ejs_cmd, "mdh_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory half-words <physical addr> [count]");
 726         register_command(cmd_ctx, arm926ejs_cmd, "mdb_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory bytes <physical addr> [count]");
 727
 728         register_command(cmd_ctx, arm926ejs_cmd, "mww_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory word <physical addr> <value>");
 729         register_command(cmd_ctx, arm926ejs_cmd, "mwh_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory half-word <physical addr> <value>");
 730         register_command(cmd_ctx, arm926ejs_cmd, "mwb_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory byte <physical addr> <value>");
 731
 732         return ERROR_OK;
 733 }
 734
 735 int arm926ejs_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 736 {
 737         int retval;
 738         target_t *target = get_current_target(cmd_ctx);
 739         armv4_5_common_t *armv4_5;
 740         arm7_9_common_t *arm7_9;
 741         arm9tdmi_common_t *arm9tdmi;
 742         arm926ejs_common_t *arm926ejs;
 743         int opcode_1;
 744         int opcode_2;
 745         int CRn;
 746         int CRm;
 747
 748         if ((argc < 4) || (argc > 5))
 749         {
 750                 command_print(cmd_ctx, "usage: arm926ejs cp15 <opcode_1> <opcode_2> <CRn> <CRm> [value]");
 751                 return ERROR_OK;
 752         }
 753
 754         opcode_1 = strtoul(args[0], NULL, 0);
 755         opcode_2 = strtoul(args[1], NULL, 0);
 756         CRn = strtoul(args[2], NULL, 0);
 757         CRm = strtoul(args[3], NULL, 0);
 758
 759         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 760         {
 761                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 762                 return ERROR_OK;
 763         }
 764
 765         if (target->state != TARGET_HALTED)
 766         {
 767                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 768                 return ERROR_OK;
 769         }
 770
 771         if (argc == 4)
 772         {
 773                 u32 value;
 774                 if ((retval = arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(opcode_1, opcode_2, CRn, CRm), &value)) != ERROR_OK)
 775                 {
 776                         command_print(cmd_ctx, "couldn't access register");
 777                         return ERROR_OK;
 778                 }
 779                 jtag_execute_queue();
 780
 781                 command_print(cmd_ctx, "%i %i %i %i: %8.8x", opcode_1, opcode_2, CRn, CRm, value);
 782         }
 783         else
 784         {
 785                 u32 value = strtoul(args[4], NULL, 0);
 786                 if ((retval = arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(opcode_1, opcode_2, CRn, CRm), value)) != ERROR_OK)
 787                 {
 788                         command_print(cmd_ctx, "couldn't access register");
 789                         return ERROR_OK;
 790                 }
 791                 command_print(cmd_ctx, "%i %i %i %i: %8.8x", opcode_1, opcode_2, CRn, CRm, value);
 792         }
 793
 794         return ERROR_OK;
 795 }
 796
 797 int arm926ejs_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 798 {
 799         target_t *target = get_current_target(cmd_ctx);
 800         armv4_5_common_t *armv4_5;
 801         arm7_9_common_t *arm7_9;
 802         arm9tdmi_common_t *arm9tdmi;
 803         arm926ejs_common_t *arm926ejs;
 804
 805         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 806         {
 807                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 808                 return ERROR_OK;
 809         }
 810
 811         return armv4_5_handle_cache_info_command(cmd_ctx, &arm926ejs->armv4_5_mmu.armv4_5_cache);
 812 }
 813
 814 int arm926ejs_handle_virt2phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 815 {
 816         target_t *target = get_current_target(cmd_ctx);
 817         armv4_5_common_t *armv4_5;
 818         arm7_9_common_t *arm7_9;
 819         arm9tdmi_common_t *arm9tdmi;
 820         arm926ejs_common_t *arm926ejs;
 821         arm_jtag_t *jtag_info;
 822
 823         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 824         {
 825                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 826                 return ERROR_OK;
 827         }
 828
 829         jtag_info = &arm7_9->jtag_info;
 830
 831         if (target->state != TARGET_HALTED)
 832         {
 833                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 834                 return ERROR_OK;
 835         }
 836
 837         return armv4_5_mmu_handle_virt2phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 838 }
 839
 840 int arm926ejs_handle_md_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 841 {
 842         target_t *target = get_current_target(cmd_ctx);
 843         armv4_5_common_t *armv4_5;
 844         arm7_9_common_t *arm7_9;
 845         arm9tdmi_common_t *arm9tdmi;
 846         arm926ejs_common_t *arm926ejs;
 847         arm_jtag_t *jtag_info;
 848
 849         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 850         {
 851                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 852                 return ERROR_OK;
 853         }
 854
 855         jtag_info = &arm7_9->jtag_info;
 856
 857         if (target->state != TARGET_HALTED)
 858         {
 859                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 860                 return ERROR_OK;
 861         }
 862
 863         return armv4_5_mmu_handle_md_phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 864 }
 865
 866 int arm926ejs_handle_mw_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 867 {
 868         target_t *target = get_current_target(cmd_ctx);
 869         armv4_5_common_t *armv4_5;
 870         arm7_9_common_t *arm7_9;
 871         arm9tdmi_common_t *arm9tdmi;
 872         arm926ejs_common_t *arm926ejs;
 873         arm_jtag_t *jtag_info;
 874
 875         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 876         {
 877                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 878                 return ERROR_OK;
 879         }
 880
 881         jtag_info = &arm7_9->jtag_info;
 882
 883         if (target->state != TARGET_HALTED)
 884         {
 885                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 886                 return ERROR_OK;
 887         }
 888
 889         return armv4_5_mmu_handle_mw_phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 890 }