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   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 "arm920t.h"
  25 #include "time_support.h"
  26 #include "target_type.h"
  27
  28
  29 /*
  30  * For information about the ARM920T, see ARM DDI 0151C especially
  31  * Chapter 9 about debug support, which shows how to manipulate each
  32  * of the different scan chains:
  33  *
  34  *   0 ... ARM920 signals, e.g. to rest of SOC (unused here)
  35  *   1 ... debugging; watchpoint and breakpoint status, etc; also
  36  *      MMU and cache access in conjunction with scan chain 15
  37  *   2 ... EmbeddedICE
  38  *   3 ... external boundary scan (SoC-specific, unused here)
  39  *   4 ... access to cache tag RAM
  40  *   6 ... ETM9
  41  *   15 ... access coprocessor 15, "physical" or "interpreted" modes
  42  *      "interpreted" works with a few actual MRC/MCR instructions
  43  *      "physical" provides register-like behaviors.
  44  *
  45  * The ARM922T is similar, but with smaller caches (8K each, vs 16K).
  46  */
  47
  48 #if 0
  49 #define _DEBUG_INSTRUCTION_EXECUTION_
  50 #endif
  51
  52 #define ARM920T_CP15_PHYS_ADDR(x, y, z) ((x << 5) | (y << 1) << (z))
  53
  54 static int arm920t_read_cp15_physical(target_t *target,
  55                 int reg_addr, uint32_t *value)
  56 {
  57         struct arm920t_common *arm920t = target_to_arm920(target);
  58         struct arm_jtag *jtag_info;
  59         struct scan_field fields[4];
  60         uint8_t access_type_buf = 1;
  61         uint8_t reg_addr_buf = reg_addr & 0x3f;
  62         uint8_t nr_w_buf = 0;
  63
  64         jtag_info = &arm920t->arm9tdmi_common.arm7_9_common.jtag_info;
  65
  66         jtag_set_end_state(TAP_IDLE);
  67         arm_jtag_scann(jtag_info, 0xf);
  68         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
  69
  70         fields[0].tap = jtag_info->tap;
  71         fields[0].num_bits = 1;
  72         fields[0].out_value = &access_type_buf;
  73         fields[0].in_value = NULL;
  74
  75         fields[1].tap = jtag_info->tap;
  76         fields[1].num_bits = 32;
  77         fields[1].out_value = NULL;
  78         fields[1].in_value = NULL;
  79
  80         fields[2].tap = jtag_info->tap;
  81         fields[2].num_bits = 6;
  82         fields[2].out_value = &reg_addr_buf;
  83         fields[2].in_value = NULL;
  84
  85         fields[3].tap = jtag_info->tap;
  86         fields[3].num_bits = 1;
  87         fields[3].out_value = &nr_w_buf;
  88         fields[3].in_value = NULL;
  89
  90         jtag_add_dr_scan(4, fields, jtag_get_end_state());
  91
  92         fields[1].in_value = (uint8_t *)value;
  93
  94         jtag_add_dr_scan(4, fields, jtag_get_end_state());
  95
  96         jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)value);
  97
  98 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
  99         jtag_execute_queue();
 100         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
 101 #endif
 102
 103         return ERROR_OK;
 104 }
 105
 106 static int arm920t_write_cp15_physical(target_t *target,
 107                 int reg_addr, uint32_t value)
 108 {
 109         struct arm920t_common *arm920t = target_to_arm920(target);
 110         struct arm_jtag *jtag_info;
 111         struct scan_field fields[4];
 112         uint8_t access_type_buf = 1;
 113         uint8_t reg_addr_buf = reg_addr & 0x3f;
 114         uint8_t nr_w_buf = 1;
 115         uint8_t value_buf[4];
 116
 117         jtag_info = &arm920t->arm9tdmi_common.arm7_9_common.jtag_info;
 118
 119         buf_set_u32(value_buf, 0, 32, value);
 120
 121         jtag_set_end_state(TAP_IDLE);
 122         arm_jtag_scann(jtag_info, 0xf);
 123         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 124
 125         fields[0].tap = jtag_info->tap;
 126         fields[0].num_bits = 1;
 127         fields[0].out_value = &access_type_buf;
 128         fields[0].in_value = NULL;
 129
 130         fields[1].tap = jtag_info->tap;
 131         fields[1].num_bits = 32;
 132         fields[1].out_value = value_buf;
 133         fields[1].in_value = NULL;
 134
 135         fields[2].tap = jtag_info->tap;
 136         fields[2].num_bits = 6;
 137         fields[2].out_value = &reg_addr_buf;
 138         fields[2].in_value = NULL;
 139
 140         fields[3].tap = jtag_info->tap;
 141         fields[3].num_bits = 1;
 142         fields[3].out_value = &nr_w_buf;
 143         fields[3].in_value = NULL;
 144
 145         jtag_add_dr_scan(4, fields, jtag_get_end_state());
 146
 147 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 148         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
 149 #endif
 150
 151         return ERROR_OK;
 152 }
 153
 154 static int arm920t_execute_cp15(target_t *target, uint32_t cp15_opcode,
 155                 uint32_t arm_opcode)
 156 {
 157         int retval;
 158         struct arm920t_common *arm920t = target_to_arm920(target);
 159         struct arm_jtag *jtag_info;
 160         struct scan_field fields[4];
 161         uint8_t access_type_buf = 0;            /* interpreted access */
 162         uint8_t reg_addr_buf = 0x0;
 163         uint8_t nr_w_buf = 0;
 164         uint8_t cp15_opcode_buf[4];
 165
 166         jtag_info = &arm920t->arm9tdmi_common.arm7_9_common.jtag_info;
 167
 168         jtag_set_end_state(TAP_IDLE);
 169         arm_jtag_scann(jtag_info, 0xf);
 170         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 171
 172         buf_set_u32(cp15_opcode_buf, 0, 32, cp15_opcode);
 173
 174         fields[0].tap = jtag_info->tap;
 175         fields[0].num_bits = 1;
 176         fields[0].out_value = &access_type_buf;
 177         fields[0].in_value = NULL;
 178
 179         fields[1].tap = jtag_info->tap;
 180         fields[1].num_bits = 32;
 181         fields[1].out_value = cp15_opcode_buf;
 182         fields[1].in_value = NULL;
 183
 184         fields[2].tap = jtag_info->tap;
 185         fields[2].num_bits = 6;
 186         fields[2].out_value = &reg_addr_buf;
 187         fields[2].in_value = NULL;
 188
 189         fields[3].tap = jtag_info->tap;
 190         fields[3].num_bits = 1;
 191         fields[3].out_value = &nr_w_buf;
 192         fields[3].in_value = NULL;
 193
 194         jtag_add_dr_scan(4, fields, jtag_get_end_state());
 195
 196         arm9tdmi_clock_out(jtag_info, arm_opcode, 0, NULL, 0);
 197         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
 198         retval = arm7_9_execute_sys_speed(target);
 199         if (retval != ERROR_OK)
 200                 return retval;
 201
 202         if ((retval = jtag_execute_queue()) != ERROR_OK)
 203         {
 204                 LOG_ERROR("failed executing JTAG queue");
 205                 return retval;
 206         }
 207
 208         return ERROR_OK;
 209 }
 210
 211 static int arm920t_read_cp15_interpreted(target_t *target,
 212                 uint32_t cp15_opcode, uint32_t address, uint32_t *value)
 213 {
 214         struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
 215         uint32_t* regs_p[1];
 216         uint32_t regs[2];
 217         uint32_t cp15c15 = 0x0;
 218
 219         /* load address into R1 */
 220         regs[1] = address;
 221         arm9tdmi_write_core_regs(target, 0x2, regs);
 222
 223         /* read-modify-write CP15 test state register
 224         * to enable interpreted access mode */
 225         arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
 226         jtag_execute_queue();
 227         cp15c15 |= 1;   /* set interpret mode */
 228         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 229
 230         /* execute CP15 instruction and ARM load (reading from coprocessor) */
 231         arm920t_execute_cp15(target, cp15_opcode, ARMV4_5_LDR(0, 1));
 232
 233         /* disable interpreted access mode */
 234         cp15c15 &= ~1U; /* clear interpret mode */
 235         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 236
 237         /* retrieve value from R0 */
 238         regs_p[0] = value;
 239         arm9tdmi_read_core_regs(target, 0x1, regs_p);
 240         jtag_execute_queue();
 241
 242 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 243         LOG_DEBUG("cp15_opcode: %8.8x, address: %8.8x, value: %8.8x", cp15_opcode, address, *value);
 244 #endif
 245
 246         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
 247                 return ERROR_FAIL;
 248
 249         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = 1;
 250         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).dirty = 1;
 251
 252         return ERROR_OK;
 253 }
 254
 255 static
 256 int arm920t_write_cp15_interpreted(target_t *target,
 257                 uint32_t cp15_opcode, uint32_t value, uint32_t address)
 258 {
 259         uint32_t cp15c15 = 0x0;
 260         struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
 261         uint32_t regs[2];
 262
 263         /* load value, address into R0, R1 */
 264         regs[0] = value;
 265         regs[1] = address;
 266         arm9tdmi_write_core_regs(target, 0x3, regs);
 267
 268         /* read-modify-write CP15 test state register
 269         * to enable interpreted access mode */
 270         arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
 271         jtag_execute_queue();
 272         cp15c15 |= 1;   /* set interpret mode */
 273         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 274
 275         /* execute CP15 instruction and ARM store (writing to coprocessor) */
 276         arm920t_execute_cp15(target, cp15_opcode, ARMV4_5_STR(0, 1));
 277
 278         /* disable interpreted access mode */
 279         cp15c15 &= ~1U; /* set interpret mode */
 280         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 281
 282 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 283         LOG_DEBUG("cp15_opcode: %8.8x, value: %8.8x, address: %8.8x", cp15_opcode, value, address);
 284 #endif
 285
 286         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
 287                 return ERROR_FAIL;
 288
 289         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = 1;
 290         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).dirty = 1;
 291
 292         return ERROR_OK;
 293 }
 294
 295 // EXPORTED to FA256
 296 uint32_t arm920t_get_ttb(target_t *target)
 297 {
 298         int retval;
 299         uint32_t ttb = 0x0;
 300
 301         if ((retval = arm920t_read_cp15_interpreted(target, 0xeebf0f51, 0x0, &ttb)) != ERROR_OK)
 302                 return retval;
 303
 304         return ttb;
 305 }
 306
 307 // EXPORTED to FA256
 308 void arm920t_disable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 309 {
 310         uint32_t cp15_control;
 311
 312         /* read cp15 control register */
 313         arm920t_read_cp15_physical(target, 0x2, &cp15_control);
 314         jtag_execute_queue();
 315
 316         if (mmu)
 317                 cp15_control &= ~0x1U;
 318
 319         if (d_u_cache)
 320                 cp15_control &= ~0x4U;
 321
 322         if (i_cache)
 323                 cp15_control &= ~0x1000U;
 324
 325         arm920t_write_cp15_physical(target, 0x2, cp15_control);
 326 }
 327
 328 // EXPORTED to FA256
 329 void arm920t_enable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 330 {
 331         uint32_t cp15_control;
 332
 333         /* read cp15 control register */
 334         arm920t_read_cp15_physical(target, 0x2, &cp15_control);
 335         jtag_execute_queue();
 336
 337         if (mmu)
 338                 cp15_control |= 0x1U;
 339
 340         if (d_u_cache)
 341                 cp15_control |= 0x4U;
 342
 343         if (i_cache)
 344                 cp15_control |= 0x1000U;
 345
 346         arm920t_write_cp15_physical(target, 0x2, cp15_control);
 347 }
 348
 349 // EXPORTED to FA256
 350 void arm920t_post_debug_entry(target_t *target)
 351 {
 352         uint32_t cp15c15;
 353         struct arm920t_common *arm920t = target_to_arm920(target);
 354
 355         /* examine cp15 control reg */
 356         arm920t_read_cp15_physical(target, 0x2, &arm920t->cp15_control_reg);
 357         jtag_execute_queue();
 358         LOG_DEBUG("cp15_control_reg: %8.8" PRIx32 "", arm920t->cp15_control_reg);
 359
 360         if (arm920t->armv4_5_mmu.armv4_5_cache.ctype == -1)
 361         {
 362                 uint32_t cache_type_reg;
 363                 /* identify caches */
 364                 arm920t_read_cp15_physical(target, 0x1, &cache_type_reg);
 365                 jtag_execute_queue();
 366                 armv4_5_identify_cache(cache_type_reg, &arm920t->armv4_5_mmu.armv4_5_cache);
 367         }
 368
 369         arm920t->armv4_5_mmu.mmu_enabled = (arm920t->cp15_control_reg & 0x1U) ? 1 : 0;
 370         arm920t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (arm920t->cp15_control_reg & 0x4U) ? 1 : 0;
 371         arm920t->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (arm920t->cp15_control_reg & 0x1000U) ? 1 : 0;
 372
 373         /* save i/d fault status and address register */
 374         arm920t_read_cp15_interpreted(target, 0xee150f10, 0x0, &arm920t->d_fsr);
 375         arm920t_read_cp15_interpreted(target, 0xee150f30, 0x0, &arm920t->i_fsr);
 376         arm920t_read_cp15_interpreted(target, 0xee160f10, 0x0, &arm920t->d_far);
 377         arm920t_read_cp15_interpreted(target, 0xee160f30, 0x0, &arm920t->i_far);
 378
 379         LOG_DEBUG("D FSR: 0x%8.8" PRIx32 ", D FAR: 0x%8.8" PRIx32 ", I FSR: 0x%8.8" PRIx32 ", I FAR: 0x%8.8" PRIx32 "",
 380                 arm920t->d_fsr, arm920t->d_far, arm920t->i_fsr, arm920t->i_far);
 381
 382         if (arm920t->preserve_cache)
 383         {
 384                 /* read-modify-write CP15 test state register
 385                  * to disable I/D-cache linefills */
 386                 arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
 387                 jtag_execute_queue();
 388                 cp15c15 |= 0x600;
 389                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 390         }
 391 }
 392
 393 // EXPORTED to FA256
 394 void arm920t_pre_restore_context(target_t *target)
 395 {
 396         uint32_t cp15c15;
 397         struct arm920t_common *arm920t = target_to_arm920(target);
 398
 399         /* restore i/d fault status and address register */
 400         arm920t_write_cp15_interpreted(target, 0xee050f10, arm920t->d_fsr, 0x0);
 401         arm920t_write_cp15_interpreted(target, 0xee050f30, arm920t->i_fsr, 0x0);
 402         arm920t_write_cp15_interpreted(target, 0xee060f10, arm920t->d_far, 0x0);
 403         arm920t_write_cp15_interpreted(target, 0xee060f30, arm920t->i_far, 0x0);
 404
 405         /* read-modify-write CP15 test state register
 406         * to reenable I/D-cache linefills */
 407         if (arm920t->preserve_cache)
 408         {
 409                 arm920t_read_cp15_physical(target, 0x1e, &cp15c15);
 410                 jtag_execute_queue();
 411                 cp15c15 &= ~0x600U;
 412                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 413         }
 414 }
 415
 416 static const char arm920_not[] = "target is not an ARM920";
 417
 418 static int arm920t_verify_pointer(struct command_context_s *cmd_ctx,
 419                 struct arm920t_common *arm920t)
 420 {
 421         if (arm920t->common_magic != ARM920T_COMMON_MAGIC) {
 422                 command_print(cmd_ctx, arm920_not);
 423                 return ERROR_TARGET_INVALID;
 424         }
 425
 426         return ERROR_OK;
 427 }
 428
 429 /** Logs summary of ARM920 state for a halted target. */
 430 int arm920t_arch_state(struct target_s *target)
 431 {
 432         static const char *state[] =
 433         {
 434                 "disabled", "enabled"
 435         };
 436
 437         struct arm920t_common *arm920t = target_to_arm920(target);
 438         struct armv4_5_common_s *armv4_5;
 439
 440         if (arm920t->common_magic != ARM920T_COMMON_MAGIC)
 441         {
 442                 LOG_ERROR("BUG: %s", arm920_not);
 443                 return ERROR_TARGET_INVALID;
 444         }
 445
 446         armv4_5 = &arm920t->arm9tdmi_common.arm7_9_common.armv4_5_common;
 447
 448         LOG_USER("target halted in %s state due to %s, current mode: %s\n"
 449                         "cpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "\n"
 450                         "MMU: %s, D-Cache: %s, I-Cache: %s",
 451                          armv4_5_state_strings[armv4_5->core_state],
 452                          Jim_Nvp_value2name_simple(nvp_target_debug_reason, target->debug_reason)->name,
 453                          armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
 454                          buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 455                          buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
 456                          state[arm920t->armv4_5_mmu.mmu_enabled],
 457                          state[arm920t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
 458                          state[arm920t->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
 459
 460         return ERROR_OK;
 461 }
 462
 463 static int arm920_mmu(struct target_s *target, int *enabled)
 464 {
 465         if (target->state != TARGET_HALTED) {
 466                 LOG_ERROR("%s: target not halted", __func__);
 467                 return ERROR_TARGET_INVALID;
 468         }
 469
 470         *enabled = target_to_arm920(target)->armv4_5_mmu.mmu_enabled;
 471         return ERROR_OK;
 472 }
 473
 474 static int arm920_virt2phys(struct target_s *target,
 475                 uint32_t virt, uint32_t *phys)
 476 {
 477         /** @todo Implement this!  */
 478         LOG_ERROR("%s: not implemented", __func__);
 479         return ERROR_FAIL;
 480 }
 481
 482 /** Reads a buffer, in the specified word size, with current MMU settings. */
 483 int arm920t_read_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
 484 {
 485         int retval;
 486
 487         retval = arm7_9_read_memory(target, address, size, count, buffer);
 488
 489         return retval;
 490 }
 491
 492
 493 static int arm920t_read_phys_memory(struct target_s *target,
 494                 uint32_t address, uint32_t size,
 495                 uint32_t count, uint8_t *buffer)
 496 {
 497         struct arm920t_common *arm920t = target_to_arm920(target);
 498
 499         return armv4_5_mmu_read_physical(target, &arm920t->armv4_5_mmu,
 500                         address, size, count, buffer);
 501 }
 502
 503 static int arm920t_write_phys_memory(struct target_s *target,
 504                 uint32_t address, uint32_t size,
 505                 uint32_t count, uint8_t *buffer)
 506 {
 507         struct arm920t_common *arm920t = target_to_arm920(target);
 508
 509         return armv4_5_mmu_write_physical(target, &arm920t->armv4_5_mmu,
 510                         address, size, count, buffer);
 511 }
 512
 513
 514 /** Writes a buffer, in the specified word size, with current MMU settings. */
 515 int arm920t_write_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
 516 {
 517         int retval;
 518
 519         if ((retval = arm7_9_write_memory(target, address, size, count, buffer)) != ERROR_OK)
 520                 return retval;
 521
 522         /* This fn is used to write breakpoints, so we need to make sure
 523          * that the data cache is flushed and the instruction cache is
 524          * invalidated
 525          */
 526         if (((size == 4) || (size == 2)) && (count == 1))
 527         {
 528                 struct arm920t_common *arm920t = target_to_arm920(target);
 529
 530                 if (arm920t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled)
 531                 {
 532                         LOG_DEBUG("D-Cache enabled, flush and invalidate cache line");
 533                         /* MCR p15,0,Rd,c7,c10,2 */
 534                         retval = arm920t_write_cp15_interpreted(target, 0xee070f5e, 0x0, address);
 535                         if (retval != ERROR_OK)
 536                                 return retval;
 537                 }
 538
 539                 if (arm920t->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
 540                 {
 541                         LOG_DEBUG("I-Cache enabled, invalidating affected I-Cache line");
 542                         retval = arm920t_write_cp15_interpreted(target, 0xee070f35, 0x0, address);
 543                         if (retval != ERROR_OK)
 544                                 return retval;
 545                 }
 546         }
 547
 548         return retval;
 549 }
 550
 551 // EXPORTED to FA256
 552 int arm920t_soft_reset_halt(struct target_s *target)
 553 {
 554         int retval = ERROR_OK;
 555         struct arm920t_common *arm920t = target_to_arm920(target);
 556         struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
 557         struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
 558         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 559
 560         if ((retval = target_halt(target)) != ERROR_OK)
 561         {
 562                 return retval;
 563         }
 564
 565         long long then = timeval_ms();
 566         int timeout;
 567         while (!(timeout = ((timeval_ms()-then) > 1000)))
 568         {
 569                 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1) == 0)
 570                 {
 571                         embeddedice_read_reg(dbg_stat);
 572                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 573                         {
 574                                 return retval;
 575                         }
 576                 } else
 577                 {
 578                         break;
 579                 }
 580                 if (debug_level >= 3)
 581                 {
 582                         /* do not eat all CPU, time out after 1 se*/
 583                         alive_sleep(100);
 584                 } else
 585                 {
 586                         keep_alive();
 587                 }
 588         }
 589         if (timeout)
 590         {
 591                 LOG_ERROR("Failed to halt CPU after 1 sec");
 592                 return ERROR_TARGET_TIMEOUT;
 593         }
 594
 595         target->state = TARGET_HALTED;
 596
 597         /* SVC, ARM state, IRQ and FIQ disabled */
 598         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8, 0xd3);
 599         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 600         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 601
 602         /* start fetching from 0x0 */
 603         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, 0x0);
 604         armv4_5->core_cache->reg_list[15].dirty = 1;
 605         armv4_5->core_cache->reg_list[15].valid = 1;
 606
 607         armv4_5->core_mode = ARMV4_5_MODE_SVC;
 608         armv4_5->core_state = ARMV4_5_STATE_ARM;
 609
 610         arm920t_disable_mmu_caches(target, 1, 1, 1);
 611         arm920t->armv4_5_mmu.mmu_enabled = 0;
 612         arm920t->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
 613         arm920t->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
 614
 615         if ((retval = target_call_event_callbacks(target, TARGET_EVENT_HALTED)) != ERROR_OK)
 616         {
 617                 return retval;
 618         }
 619
 620         return ERROR_OK;
 621 }
 622
 623 int arm920t_init_arch_info(target_t *target, struct arm920t_common *arm920t, struct jtag_tap *tap)
 624 {
 625         struct arm9tdmi_common *arm9tdmi = &arm920t->arm9tdmi_common;
 626         struct arm7_9_common *arm7_9 = &arm9tdmi->arm7_9_common;
 627
 628         /* initialize arm9tdmi specific info (including arm7_9 and armv4_5)
 629          */
 630         arm9tdmi_init_arch_info(target, arm9tdmi, tap);
 631
 632         arm920t->common_magic = ARM920T_COMMON_MAGIC;
 633
 634         arm7_9->post_debug_entry = arm920t_post_debug_entry;
 635         arm7_9->pre_restore_context = arm920t_pre_restore_context;
 636
 637         arm920t->armv4_5_mmu.armv4_5_cache.ctype = -1;
 638         arm920t->armv4_5_mmu.get_ttb = arm920t_get_ttb;
 639         arm920t->armv4_5_mmu.read_memory = arm7_9_read_memory;
 640         arm920t->armv4_5_mmu.write_memory = arm7_9_write_memory;
 641         arm920t->armv4_5_mmu.disable_mmu_caches = arm920t_disable_mmu_caches;
 642         arm920t->armv4_5_mmu.enable_mmu_caches = arm920t_enable_mmu_caches;
 643         arm920t->armv4_5_mmu.has_tiny_pages = 1;
 644         arm920t->armv4_5_mmu.mmu_enabled = 0;
 645
 646         /* disabling linefills leads to lockups, so keep them enabled for now
 647          * this doesn't affect correctness, but might affect timing issues, if
 648          * important data is evicted from the cache during the debug session
 649          * */
 650         arm920t->preserve_cache = 0;
 651
 652         /* override hw single-step capability from ARM9TDMI */
 653         arm7_9->has_single_step = 1;
 654
 655         return ERROR_OK;
 656 }
 657
 658 static int arm920t_target_create(struct target_s *target, Jim_Interp *interp)
 659 {
 660         struct arm920t_common *arm920t = calloc(1,sizeof(struct arm920t_common));
 661
 662         return arm920t_init_arch_info(target, arm920t, target->tap);
 663 }
 664
 665 COMMAND_HANDLER(arm920t_handle_read_cache_command)
 666 {
 667         int retval = ERROR_OK;
 668         target_t *target = get_current_target(cmd_ctx);
 669         struct arm920t_common *arm920t = target_to_arm920(target);
 670         struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
 671         struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
 672         uint32_t cp15c15;
 673         uint32_t cp15_ctrl, cp15_ctrl_saved;
 674         uint32_t regs[16];
 675         uint32_t *regs_p[16];
 676         uint32_t C15_C_D_Ind, C15_C_I_Ind;
 677         int i;
 678         FILE *output;
 679         struct arm920t_cache_line d_cache[8][64], i_cache[8][64];
 680         int segment, index;
 681
 682         retval = arm920t_verify_pointer(cmd_ctx, arm920t);
 683         if (retval != ERROR_OK)
 684                 return retval;
 685
 686         if (argc != 1)
 687         {
 688                 command_print(cmd_ctx, "usage: arm920t read_cache <filename>");
 689                 return ERROR_OK;
 690         }
 691
 692         if ((output = fopen(args[0], "w")) == NULL)
 693         {
 694                 LOG_DEBUG("error opening cache content file");
 695                 return ERROR_OK;
 696         }
 697
 698         for (i = 0; i < 16; i++)
 699                 regs_p[i] = &regs[i];
 700
 701         /* disable MMU and Caches */
 702         arm920t_read_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), &cp15_ctrl);
 703         if ((retval = jtag_execute_queue()) != ERROR_OK)
 704         {
 705                 return retval;
 706         }
 707         cp15_ctrl_saved = cp15_ctrl;
 708         cp15_ctrl &= ~(ARMV4_5_MMU_ENABLED | ARMV4_5_D_U_CACHE_ENABLED | ARMV4_5_I_CACHE_ENABLED);
 709         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), cp15_ctrl);
 710
 711         /* read CP15 test state register */
 712         arm920t_read_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), &cp15c15);
 713         jtag_execute_queue();
 714
 715         /* read DCache content */
 716         fprintf(output, "DCache:\n");
 717
 718         /* go through segments 0 to nsets (8 on ARM920T, 4 on ARM922T) */
 719         for (segment = 0; segment < arm920t->armv4_5_mmu.armv4_5_cache.d_u_size.nsets; segment++)
 720         {
 721                 fprintf(output, "\nsegment: %i\n----------", segment);
 722
 723                 /* Ra: r0 = SBZ(31:8):segment(7:5):SBZ(4:0) */
 724                 regs[0] = 0x0 | (segment << 5);
 725                 arm9tdmi_write_core_regs(target, 0x1, regs);
 726
 727                 /* set interpret mode */
 728                 cp15c15 |= 0x1;
 729                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 730
 731                 /* D CAM Read, loads current victim into C15.C.D.Ind */
 732                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,6,2), ARMV4_5_LDR(1, 0));
 733
 734                 /* read current victim */
 735                 arm920t_read_cp15_physical(target, 0x3d, &C15_C_D_Ind);
 736
 737                 /* clear interpret mode */
 738                 cp15c15 &= ~0x1;
 739                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 740
 741                 for (index = 0; index < 64; index++)
 742                 {
 743                         /* Ra: r0 = index(31:26):SBZ(25:8):segment(7:5):SBZ(4:0) */
 744                         regs[0] = 0x0 | (segment << 5) | (index << 26);
 745                         arm9tdmi_write_core_regs(target, 0x1, regs);
 746
 747                         /* set interpret mode */
 748                         cp15c15 |= 0x1;
 749                         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 750
 751                         /* Write DCache victim */
 752                         arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,9,1,0), ARMV4_5_LDR(1, 0));
 753
 754                         /* Read D RAM */
 755                         arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,10,2), ARMV4_5_LDMIA(0, 0x1fe, 0, 0));
 756
 757                         /* Read D CAM */
 758                         arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,6,2), ARMV4_5_LDR(9, 0));
 759
 760                         /* clear interpret mode */
 761                         cp15c15 &= ~0x1;
 762                         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 763
 764                         /* read D RAM and CAM content */
 765                         arm9tdmi_read_core_regs(target, 0x3fe, regs_p);
 766                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 767                         {
 768                                 return retval;
 769                         }
 770
 771                         d_cache[segment][index].cam = regs[9];
 772
 773                         /* mask LFSR[6] */
 774                         regs[9] &= 0xfffffffe;
 775                         fprintf(output, "\nsegment: %i, index: %i, CAM: 0x%8.8" PRIx32 ", content (%s):\n", segment, index, regs[9], (regs[9] & 0x10) ? "valid" : "invalid");
 776
 777                         for (i = 1; i < 9; i++)
 778                         {
 779                                  d_cache[segment][index].data[i] = regs[i];
 780                                  fprintf(output, "%i: 0x%8.8" PRIx32 "\n", i-1, regs[i]);
 781                         }
 782
 783                 }
 784
 785                 /* Ra: r0 = index(31:26):SBZ(25:8):segment(7:5):SBZ(4:0) */
 786                 regs[0] = 0x0 | (segment << 5) | (C15_C_D_Ind << 26);
 787                 arm9tdmi_write_core_regs(target, 0x1, regs);
 788
 789                 /* set interpret mode */
 790                 cp15c15 |= 0x1;
 791                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 792
 793                 /* Write DCache victim */
 794                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,9,1,0), ARMV4_5_LDR(1, 0));
 795
 796                 /* clear interpret mode */
 797                 cp15c15 &= ~0x1;
 798                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 799         }
 800
 801         /* read ICache content */
 802         fprintf(output, "ICache:\n");
 803
 804         /* go through segments 0 to nsets (8 on ARM920T, 4 on ARM922T) */
 805         for (segment = 0; segment < arm920t->armv4_5_mmu.armv4_5_cache.d_u_size.nsets; segment++)
 806         {
 807                 fprintf(output, "segment: %i\n----------", segment);
 808
 809                 /* Ra: r0 = SBZ(31:8):segment(7:5):SBZ(4:0) */
 810                 regs[0] = 0x0 | (segment << 5);
 811                 arm9tdmi_write_core_regs(target, 0x1, regs);
 812
 813                 /* set interpret mode */
 814                 cp15c15 |= 0x1;
 815                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 816
 817                 /* I CAM Read, loads current victim into C15.C.I.Ind */
 818                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,5,2), ARMV4_5_LDR(1, 0));
 819
 820                 /* read current victim */
 821                 arm920t_read_cp15_physical(target, 0x3b, &C15_C_I_Ind);
 822
 823                 /* clear interpret mode */
 824                 cp15c15 &= ~0x1;
 825                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 826
 827                 for (index = 0; index < 64; index++)
 828                 {
 829                         /* Ra: r0 = index(31:26):SBZ(25:8):segment(7:5):SBZ(4:0) */
 830                         regs[0] = 0x0 | (segment << 5) | (index << 26);
 831                         arm9tdmi_write_core_regs(target, 0x1, regs);
 832
 833                         /* set interpret mode */
 834                         cp15c15 |= 0x1;
 835                         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 836
 837                         /* Write ICache victim */
 838                         arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,9,1,1), ARMV4_5_LDR(1, 0));
 839
 840                         /* Read I RAM */
 841                         arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,9,2), ARMV4_5_LDMIA(0, 0x1fe, 0, 0));
 842
 843                         /* Read I CAM */
 844                         arm920t_execute_cp15(target, ARMV4_5_MCR(15,2,0,15,5,2), ARMV4_5_LDR(9, 0));
 845
 846                         /* clear interpret mode */
 847                         cp15c15 &= ~0x1;
 848                         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 849
 850                         /* read I RAM and CAM content */
 851                         arm9tdmi_read_core_regs(target, 0x3fe, regs_p);
 852                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 853                         {
 854                                 return retval;
 855                         }
 856
 857                         i_cache[segment][index].cam = regs[9];
 858
 859                         /* mask LFSR[6] */
 860                         regs[9] &= 0xfffffffe;
 861                         fprintf(output, "\nsegment: %i, index: %i, CAM: 0x%8.8" PRIx32 ", content (%s):\n", segment, index, regs[9], (regs[9] & 0x10) ? "valid" : "invalid");
 862
 863                         for (i = 1; i < 9; i++)
 864                         {
 865                                  i_cache[segment][index].data[i] = regs[i];
 866                                  fprintf(output, "%i: 0x%8.8" PRIx32 "\n", i-1, regs[i]);
 867                         }
 868                 }
 869
 870                 /* Ra: r0 = index(31:26):SBZ(25:8):segment(7:5):SBZ(4:0) */
 871                 regs[0] = 0x0 | (segment << 5) | (C15_C_D_Ind << 26);
 872                 arm9tdmi_write_core_regs(target, 0x1, regs);
 873
 874                 /* set interpret mode */
 875                 cp15c15 |= 0x1;
 876                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 877
 878                 /* Write ICache victim */
 879                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,9,1,1), ARMV4_5_LDR(1, 0));
 880
 881                 /* clear interpret mode */
 882                 cp15c15 &= ~0x1;
 883                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 884         }
 885
 886         /* restore CP15 MMU and Cache settings */
 887         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), cp15_ctrl_saved);
 888
 889         command_print(cmd_ctx, "cache content successfully output to %s", args[0]);
 890
 891         fclose(output);
 892
 893         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
 894                 return ERROR_FAIL;
 895
 896         /* mark registers dirty. */
 897         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).valid;
 898         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).valid;
 899         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 2).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 2).valid;
 900         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 3).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 3).valid;
 901         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 4).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 4).valid;
 902         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 5).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 5).valid;
 903         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 6).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 6).valid;
 904         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 7).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 7).valid;
 905         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 8).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 8).valid;
 906         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 9).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 9).valid;
 907
 908         return ERROR_OK;
 909 }
 910
 911 COMMAND_HANDLER(arm920t_handle_read_mmu_command)
 912 {
 913         int retval = ERROR_OK;
 914         target_t *target = get_current_target(cmd_ctx);
 915         struct arm920t_common *arm920t = target_to_arm920(target);
 916         struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
 917         struct armv4_5_common_s *armv4_5 = &arm7_9->armv4_5_common;
 918         uint32_t cp15c15;
 919         uint32_t cp15_ctrl, cp15_ctrl_saved;
 920         uint32_t regs[16];
 921         uint32_t *regs_p[16];
 922         int i;
 923         FILE *output;
 924         uint32_t Dlockdown, Ilockdown;
 925         struct arm920t_tlb_entry d_tlb[64], i_tlb[64];
 926         int victim;
 927
 928         retval = arm920t_verify_pointer(cmd_ctx, arm920t);
 929         if (retval != ERROR_OK)
 930                 return retval;
 931
 932         if (argc != 1)
 933         {
 934                 command_print(cmd_ctx, "usage: arm920t read_mmu <filename>");
 935                 return ERROR_OK;
 936         }
 937
 938         if ((output = fopen(args[0], "w")) == NULL)
 939         {
 940                 LOG_DEBUG("error opening mmu content file");
 941                 return ERROR_OK;
 942         }
 943
 944         for (i = 0; i < 16; i++)
 945                 regs_p[i] = &regs[i];
 946
 947         /* disable MMU and Caches */
 948         arm920t_read_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), &cp15_ctrl);
 949         if ((retval = jtag_execute_queue()) != ERROR_OK)
 950         {
 951                 return retval;
 952         }
 953         cp15_ctrl_saved = cp15_ctrl;
 954         cp15_ctrl &= ~(ARMV4_5_MMU_ENABLED | ARMV4_5_D_U_CACHE_ENABLED | ARMV4_5_I_CACHE_ENABLED);
 955         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), cp15_ctrl);
 956
 957         /* read CP15 test state register */
 958         arm920t_read_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), &cp15c15);
 959         if ((retval = jtag_execute_queue()) != ERROR_OK)
 960         {
 961                 return retval;
 962         }
 963
 964         /* prepare reading D TLB content
 965          * */
 966
 967         /* set interpret mode */
 968         cp15c15 |= 0x1;
 969         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 970
 971         /* Read D TLB lockdown */
 972         arm920t_execute_cp15(target, ARMV4_5_MRC(15,0,0,10,0,0), ARMV4_5_LDR(1, 0));
 973
 974         /* clear interpret mode */
 975         cp15c15 &= ~0x1;
 976         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
 977
 978         /* read D TLB lockdown stored to r1 */
 979         arm9tdmi_read_core_regs(target, 0x2, regs_p);
 980         if ((retval = jtag_execute_queue()) != ERROR_OK)
 981         {
 982                 return retval;
 983         }
 984         Dlockdown = regs[1];
 985
 986         for (victim = 0; victim < 64; victim += 8)
 987         {
 988                 /* new lockdown value: base[31:26]:victim[25:20]:SBZ[19:1]:p[0]
 989                  * base remains unchanged, victim goes through entries 0 to 63 */
 990                 regs[1] = (Dlockdown & 0xfc000000) | (victim << 20);
 991                 arm9tdmi_write_core_regs(target, 0x2, regs);
 992
 993                 /* set interpret mode */
 994                 cp15c15 |= 0x1;
 995                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
 996
 997                 /* Write D TLB lockdown */
 998                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,0), ARMV4_5_STR(1, 0));
 999
1000                 /* Read D TLB CAM */
1001                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,6,4), ARMV4_5_LDMIA(0, 0x3fc, 0, 0));
1002
1003                 /* clear interpret mode */
1004                 cp15c15 &= ~0x1;
1005                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
1006
1007                 /* read D TLB CAM content stored to r2-r9 */
1008                 arm9tdmi_read_core_regs(target, 0x3fc, regs_p);
1009                 if ((retval = jtag_execute_queue()) != ERROR_OK)
1010                 {
1011                         return retval;
1012                 }
1013
1014                 for (i = 0; i < 8; i++)
1015                         d_tlb[victim + i].cam = regs[i + 2];
1016         }
1017
1018         for (victim = 0; victim < 64; victim++)
1019         {
1020                 /* new lockdown value: base[31:26]:victim[25:20]:SBZ[19:1]:p[0]
1021                  * base remains unchanged, victim goes through entries 0 to 63 */
1022                 regs[1] = (Dlockdown & 0xfc000000) | (victim << 20);
1023                 arm9tdmi_write_core_regs(target, 0x2, regs);
1024
1025                 /* set interpret mode */
1026                 cp15c15 |= 0x1;
1027                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
1028
1029                 /* Write D TLB lockdown */
1030                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,0), ARMV4_5_STR(1, 0));
1031
1032                 /* Read D TLB RAM1 */
1033                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,10,4), ARMV4_5_LDR(2,0));
1034
1035                 /* Read D TLB RAM2 */
1036                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,2,5), ARMV4_5_LDR(3,0));
1037
1038                 /* clear interpret mode */
1039                 cp15c15 &= ~0x1;
1040                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
1041
1042                 /* read D TLB RAM content stored to r2 and r3 */
1043                 arm9tdmi_read_core_regs(target, 0xc, regs_p);
1044                 if ((retval = jtag_execute_queue()) != ERROR_OK)
1045                 {
1046                         return retval;
1047                 }
1048
1049                 d_tlb[victim].ram1 = regs[2];
1050                 d_tlb[victim].ram2 = regs[3];
1051         }
1052
1053         /* restore D TLB lockdown */
1054         regs[1] = Dlockdown;
1055         arm9tdmi_write_core_regs(target, 0x2, regs);
1056
1057         /* Write D TLB lockdown */
1058         arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,0), ARMV4_5_STR(1, 0));
1059
1060         /* prepare reading I TLB content
1061          * */
1062
1063         /* set interpret mode */
1064         cp15c15 |= 0x1;
1065         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
1066
1067         /* Read I TLB lockdown */
1068         arm920t_execute_cp15(target, ARMV4_5_MRC(15,0,0,10,0,1), ARMV4_5_LDR(1, 0));
1069
1070         /* clear interpret mode */
1071         cp15c15 &= ~0x1;
1072         arm920t_write_cp15_physical(target, 0x1e, cp15c15);
1073
1074         /* read I TLB lockdown stored to r1 */
1075         arm9tdmi_read_core_regs(target, 0x2, regs_p);
1076         if ((retval = jtag_execute_queue()) != ERROR_OK)
1077         {
1078                 return retval;
1079         }
1080         Ilockdown = regs[1];
1081
1082         for (victim = 0; victim < 64; victim += 8)
1083         {
1084                 /* new lockdown value: base[31:26]:victim[25:20]:SBZ[19:1]:p[0]
1085                  * base remains unchanged, victim goes through entries 0 to 63 */
1086                 regs[1] = (Ilockdown & 0xfc000000) | (victim << 20);
1087                 arm9tdmi_write_core_regs(target, 0x2, regs);
1088
1089                 /* set interpret mode */
1090                 cp15c15 |= 0x1;
1091                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
1092
1093                 /* Write I TLB lockdown */
1094                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,1), ARMV4_5_STR(1, 0));
1095
1096                 /* Read I TLB CAM */
1097                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,5,4), ARMV4_5_LDMIA(0, 0x3fc, 0, 0));
1098
1099                 /* clear interpret mode */
1100                 cp15c15 &= ~0x1;
1101                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
1102
1103                 /* read I TLB CAM content stored to r2-r9 */
1104                 arm9tdmi_read_core_regs(target, 0x3fc, regs_p);
1105                 if ((retval = jtag_execute_queue()) != ERROR_OK)
1106                 {
1107                         return retval;
1108                 }
1109
1110                 for (i = 0; i < 8; i++)
1111                         i_tlb[i + victim].cam = regs[i + 2];
1112         }
1113
1114         for (victim = 0; victim < 64; victim++)
1115         {
1116                 /* new lockdown value: base[31:26]:victim[25:20]:SBZ[19:1]:p[0]
1117                  * base remains unchanged, victim goes through entries 0 to 63 */
1118                 regs[1] = (Dlockdown & 0xfc000000) | (victim << 20);
1119                 arm9tdmi_write_core_regs(target, 0x2, regs);
1120
1121                 /* set interpret mode */
1122                 cp15c15 |= 0x1;
1123                 arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0xf, 0), cp15c15);
1124
1125                 /* Write I TLB lockdown */
1126                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,1), ARMV4_5_STR(1, 0));
1127
1128                 /* Read I TLB RAM1 */
1129                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,9,4), ARMV4_5_LDR(2,0));
1130
1131                 /* Read I TLB RAM2 */
1132                 arm920t_execute_cp15(target, ARMV4_5_MCR(15,4,0,15,1,5), ARMV4_5_LDR(3,0));
1133
1134                 /* clear interpret mode */
1135                 cp15c15 &= ~0x1;
1136                 arm920t_write_cp15_physical(target, 0x1e, cp15c15);
1137
1138                 /* read I TLB RAM content stored to r2 and r3 */
1139                 arm9tdmi_read_core_regs(target, 0xc, regs_p);
1140                 if ((retval = jtag_execute_queue()) != ERROR_OK)
1141                 {
1142                         return retval;
1143                 }
1144
1145                 i_tlb[victim].ram1 = regs[2];
1146                 i_tlb[victim].ram2 = regs[3];
1147         }
1148
1149         /* restore I TLB lockdown */
1150         regs[1] = Ilockdown;
1151         arm9tdmi_write_core_regs(target, 0x2, regs);
1152
1153         /* Write I TLB lockdown */
1154         arm920t_execute_cp15(target, ARMV4_5_MCR(15,0,0,10,0,1), ARMV4_5_STR(1, 0));
1155
1156         /* restore CP15 MMU and Cache settings */
1157         arm920t_write_cp15_physical(target, ARM920T_CP15_PHYS_ADDR(0, 0x1, 0), cp15_ctrl_saved);
1158
1159         /* output data to file */
1160         fprintf(output, "D TLB content:\n");
1161         for (i = 0; i < 64; i++)
1162         {
1163                 fprintf(output, "%i: 0x%8.8" PRIx32 " 0x%8.8" PRIx32 " 0x%8.8" PRIx32 " %s\n", i, d_tlb[i].cam, d_tlb[i].ram1, d_tlb[i].ram2, (d_tlb[i].cam & 0x20) ? "(valid)" : "(invalid)");
1164         }
1165
1166         fprintf(output, "\n\nI TLB content:\n");
1167         for (i = 0; i < 64; i++)
1168         {
1169                 fprintf(output, "%i: 0x%8.8" PRIx32 " 0x%8.8" PRIx32 " 0x%8.8" PRIx32 " %s\n", i, i_tlb[i].cam, i_tlb[i].ram1, i_tlb[i].ram2, (i_tlb[i].cam & 0x20) ? "(valid)" : "(invalid)");
1170         }
1171
1172         command_print(cmd_ctx, "mmu content successfully output to %s", args[0]);
1173
1174         fclose(output);
1175
1176         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
1177                 return ERROR_FAIL;
1178
1179         /* mark registers dirty */
1180         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0).valid;
1181         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 1).valid;
1182         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 2).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 2).valid;
1183         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 3).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 3).valid;
1184         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 4).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 4).valid;
1185         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 5).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 5).valid;
1186         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 6).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 6).valid;
1187         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 7).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 7).valid;
1188         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 8).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 8).valid;
1189         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 9).dirty = ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 9).valid;
1190
1191         return ERROR_OK;
1192 }
1193
1194 COMMAND_HANDLER(arm920t_handle_cp15_command)
1195 {
1196         int retval;
1197         target_t *target = get_current_target(cmd_ctx);
1198         struct arm920t_common *arm920t = target_to_arm920(target);
1199
1200         retval = arm920t_verify_pointer(cmd_ctx, arm920t);
1201         if (retval != ERROR_OK)
1202                 return retval;
1203
1204         if (target->state != TARGET_HALTED)
1205         {
1206                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", CMD_NAME);
1207                 return ERROR_OK;
1208         }
1209
1210         /* one or more argument, access a single register (write if second argument is given */
1211         if (argc >= 1)
1212         {
1213                 int address;
1214                 COMMAND_PARSE_NUMBER(int, args[0], address);
1215
1216                 if (argc == 1)
1217                 {
1218                         uint32_t value;
1219                         if ((retval = arm920t_read_cp15_physical(target, address, &value)) != ERROR_OK)
1220                         {
1221                                 command_print(cmd_ctx, "couldn't access reg %i", address);
1222                                 return ERROR_OK;
1223                         }
1224                         if ((retval = jtag_execute_queue()) != ERROR_OK)
1225                         {
1226                                 return retval;
1227                         }
1228
1229                         command_print(cmd_ctx, "%i: %8.8" PRIx32 "", address, value);
1230                 }
1231                 else if (argc == 2)
1232                 {
1233                         uint32_t value;
1234                         COMMAND_PARSE_NUMBER(u32, args[1], value);
1235                         if ((retval = arm920t_write_cp15_physical(target, address, value)) != ERROR_OK)
1236                         {
1237                                 command_print(cmd_ctx, "couldn't access reg %i", address);
1238                                 return ERROR_OK;
1239                         }
1240                         command_print(cmd_ctx, "%i: %8.8" PRIx32 "", address, value);
1241                 }
1242         }
1243
1244         return ERROR_OK;
1245 }
1246
1247 COMMAND_HANDLER(arm920t_handle_cp15i_command)
1248 {
1249         int retval;
1250         target_t *target = get_current_target(cmd_ctx);
1251         struct arm920t_common *arm920t = target_to_arm920(target);
1252
1253         retval = arm920t_verify_pointer(cmd_ctx, arm920t);
1254         if (retval != ERROR_OK)
1255                 return retval;
1256
1257
1258         if (target->state != TARGET_HALTED)
1259         {
1260                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", CMD_NAME);
1261                 return ERROR_OK;
1262         }
1263
1264         /* one or more argument, access a single register (write if second argument is given */
1265         if (argc >= 1)
1266         {
1267                 uint32_t opcode;
1268                 COMMAND_PARSE_NUMBER(u32, args[0], opcode);
1269
1270                 if (argc == 1)
1271                 {
1272                         uint32_t value;
1273                         if ((retval = arm920t_read_cp15_interpreted(target, opcode, 0x0, &value)) != ERROR_OK)
1274                         {
1275                                 command_print(cmd_ctx, "couldn't execute %8.8" PRIx32 "", opcode);
1276                                 return ERROR_OK;
1277                         }
1278
1279                         command_print(cmd_ctx, "%8.8" PRIx32 ": %8.8" PRIx32 "", opcode, value);
1280                 }
1281                 else if (argc == 2)
1282                 {
1283                         uint32_t value;
1284                         COMMAND_PARSE_NUMBER(u32, args[1], value);
1285                         if ((retval = arm920t_write_cp15_interpreted(target, opcode, value, 0)) != ERROR_OK)
1286                         {
1287                                 command_print(cmd_ctx, "couldn't execute %8.8" PRIx32 "", opcode);
1288                                 return ERROR_OK;
1289                         }
1290                         command_print(cmd_ctx, "%8.8" PRIx32 ": %8.8" PRIx32 "", opcode, value);
1291                 }
1292                 else if (argc == 3)
1293                 {
1294                         uint32_t value;
1295                         COMMAND_PARSE_NUMBER(u32, args[1], value);
1296                         uint32_t address;
1297                         COMMAND_PARSE_NUMBER(u32, args[2], address);
1298                         if ((retval = arm920t_write_cp15_interpreted(target, opcode, value, address)) != ERROR_OK)
1299                         {
1300                                 command_print(cmd_ctx, "couldn't execute %8.8" PRIx32 "", opcode);
1301                                 return ERROR_OK;
1302                         }
1303                         command_print(cmd_ctx, "%8.8" PRIx32 ": %8.8" PRIx32 " %8.8" PRIx32 "", opcode, value, address);
1304                 }
1305         }
1306         else
1307         {
1308                 command_print(cmd_ctx, "usage: arm920t cp15i <opcode> [value] [address]");
1309         }
1310
1311         return ERROR_OK;
1312 }
1313
1314 COMMAND_HANDLER(arm920t_handle_cache_info_command)
1315 {
1316         int retval;
1317         target_t *target = get_current_target(cmd_ctx);
1318         struct arm920t_common *arm920t = target_to_arm920(target);
1319
1320         retval = arm920t_verify_pointer(cmd_ctx, arm920t);
1321         if (retval != ERROR_OK)
1322                 return retval;
1323
1324         return armv4_5_handle_cache_info_command(cmd_ctx, &arm920t->armv4_5_mmu.armv4_5_cache);
1325 }
1326
1327
1328 static int arm920t_mrc(target_t *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
1329 {
1330         if (cpnum!=15)
1331         {
1332                 LOG_ERROR("Only cp15 is supported");
1333                 return ERROR_FAIL;
1334         }
1335
1336         return arm920t_read_cp15_interpreted(target, mrc_opcode(cpnum, op1, op2, CRn, CRm), 0, value);
1337 }
1338
1339 static int arm920t_mcr(target_t *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
1340 {
1341         if (cpnum!=15)
1342         {
1343                 LOG_ERROR("Only cp15 is supported");
1344                 return ERROR_FAIL;
1345         }
1346
1347         return arm920t_write_cp15_interpreted(target, mrc_opcode(cpnum, op1, op2, CRn, CRm), 0, value);
1348 }
1349
1350 /** Registers commands to access coprocessor, cache, and MMU resources. */
1351 int arm920t_register_commands(struct command_context_s *cmd_ctx)
1352 {
1353         int retval;
1354         command_t *arm920t_cmd;
1355
1356         retval = arm9tdmi_register_commands(cmd_ctx);
1357
1358         arm920t_cmd = register_command(cmd_ctx, NULL, "arm920t",
1359                         NULL, COMMAND_ANY,
1360                         "arm920t specific commands");
1361
1362         register_command(cmd_ctx, arm920t_cmd, "cp15",
1363                         arm920t_handle_cp15_command, COMMAND_EXEC,
1364                         "display/modify cp15 register <num> [value]");
1365         register_command(cmd_ctx, arm920t_cmd, "cp15i",
1366                         arm920t_handle_cp15i_command, COMMAND_EXEC,
1367                         "display/modify cp15 (interpreted access) "
1368                                 "<opcode> [value] [address]");
1369         register_command(cmd_ctx, arm920t_cmd, "cache_info",
1370                         arm920t_handle_cache_info_command, COMMAND_EXEC,
1371                         "display information about target caches");
1372         register_command(cmd_ctx, arm920t_cmd, "read_cache",
1373                         arm920t_handle_read_cache_command, COMMAND_EXEC,
1374                         "display I/D cache content");
1375         register_command(cmd_ctx, arm920t_cmd, "read_mmu",
1376                         arm920t_handle_read_mmu_command, COMMAND_EXEC,
1377                         "display I/D mmu content");
1378
1379         return retval;
1380 }
1381
1382 /** Holds methods for ARM920 targets. */
1383 struct target_type arm920t_target =
1384 {
1385         .name = "arm920t",
1386
1387         .poll = arm7_9_poll,
1388         .arch_state = arm920t_arch_state,
1389
1390         .target_request_data = arm7_9_target_request_data,
1391
1392         .halt = arm7_9_halt,
1393         .resume = arm7_9_resume,
1394         .step = arm7_9_step,
1395
1396         .assert_reset = arm7_9_assert_reset,
1397         .deassert_reset = arm7_9_deassert_reset,
1398         .soft_reset_halt = arm920t_soft_reset_halt,
1399
1400         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
1401
1402         .read_memory = arm920t_read_memory,
1403         .write_memory = arm920t_write_memory,
1404         .read_phys_memory = arm920t_read_phys_memory,
1405         .write_phys_memory = arm920t_write_phys_memory,
1406         .mmu = arm920_mmu,
1407         .virt2phys = arm920_virt2phys,
1408
1409         .bulk_write_memory = arm7_9_bulk_write_memory,
1410         .checksum_memory = arm7_9_checksum_memory,
1411         .blank_check_memory = arm7_9_blank_check_memory,
1412
1413         .run_algorithm = armv4_5_run_algorithm,
1414
1415         .add_breakpoint = arm7_9_add_breakpoint,
1416         .remove_breakpoint = arm7_9_remove_breakpoint,
1417         .add_watchpoint = arm7_9_add_watchpoint,
1418         .remove_watchpoint = arm7_9_remove_watchpoint,
1419
1420         .register_commands = arm920t_register_commands,
1421         .target_create = arm920t_target_create,
1422         .init_target = arm9tdmi_init_target,
1423         .examine = arm9tdmi_examine,
1424         .mrc = arm920t_mrc,
1425         .mcr = arm920t_mcr,
1426 };