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 #include "time_support.h"
  28
  29 #include <stdlib.h>
  30 #include <string.h>
  31
  32 #if 0
  33 #define _DEBUG_INSTRUCTION_EXECUTION_
  34 #endif
  35
  36 /* cli handling */
  37 int arm926ejs_register_commands(struct command_context_s *cmd_ctx);
  38
  39 int arm926ejs_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  40 int arm926ejs_handle_cp15i_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  41 int arm926ejs_handle_virt2phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  42 int arm926ejs_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  43 int arm926ejs_handle_md_phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  44 int arm926ejs_handle_mw_phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  45
  46 int arm926ejs_handle_read_cache_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  47 int arm926ejs_handle_read_mmu_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  48
  49 /* forward declarations */
  50 int arm926ejs_target_create(struct target_s *target, Jim_Interp *interp);
  51 int arm926ejs_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  52 int arm926ejs_quit(void);
  53 int arm926ejs_arch_state(struct target_s *target);
  54 int arm926ejs_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  55 int arm926ejs_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  56 int arm926ejs_soft_reset_halt(struct target_s *target);
  57 static int arm926ejs_virt2phys(struct target_s *target, u32 virtual, u32 *physical);
  58 static int arm926ejs_mmu(struct target_s *target, int *enabled);
  59
  60 target_type_t arm926ejs_target =
  61 {
  62         .name = "arm926ejs",
  63
  64         .poll = arm7_9_poll,
  65         .arch_state = arm926ejs_arch_state,
  66
  67         .target_request_data = arm7_9_target_request_data,
  68
  69         .halt = arm7_9_halt,
  70         .resume = arm7_9_resume,
  71         .step = arm7_9_step,
  72
  73         .assert_reset = arm7_9_assert_reset,
  74         .deassert_reset = arm7_9_deassert_reset,
  75         .soft_reset_halt = arm926ejs_soft_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         .checksum_memory = arm7_9_checksum_memory,
  83         .blank_check_memory = arm7_9_blank_check_memory,
  84
  85         .run_algorithm = armv4_5_run_algorithm,
  86
  87         .add_breakpoint = arm7_9_add_breakpoint,
  88         .remove_breakpoint = arm7_9_remove_breakpoint,
  89         .add_watchpoint = arm7_9_add_watchpoint,
  90         .remove_watchpoint = arm7_9_remove_watchpoint,
  91
  92         .register_commands = arm926ejs_register_commands,
  93         .target_create = arm926ejs_target_create,
  94         .init_target = arm926ejs_init_target,
  95         .examine = arm9tdmi_examine,
  96         .quit = arm926ejs_quit,
  97         .virt2phys = arm926ejs_virt2phys,
  98         .mmu = arm926ejs_mmu
  99 };
 100
 101 int arm926ejs_catch_broken_irscan(u8 *captured, void *priv, scan_field_t *field)
 102 {
 103         /* The ARM926EJ-S' instruction register is 4 bits wide */
 104         u8 t = *captured & 0xf;
 105         u8 t2 = *field->in_check_value & 0xf;
 106         if (t == t2)
 107         {
 108                 return ERROR_OK;
 109         }
 110         else if ((t == 0x0f) || (t == 0x00))
 111         {
 112                 LOG_DEBUG("caught ARM926EJ-S invalid Capture-IR result after CP15 access");
 113                 return ERROR_OK;
 114         }
 115         return ERROR_JTAG_QUEUE_FAILED;;
 116 }
 117
 118 #define ARM926EJS_CP15_ADDR(opcode_1, opcode_2, CRn, CRm) ((opcode_1 << 11) | (opcode_2 << 8) | (CRn << 4) | (CRm << 0))
 119
 120 int arm926ejs_cp15_read(target_t *target, u32 op1, u32 op2, u32 CRn, u32 CRm, u32 *value)
 121 {
 122         int retval = ERROR_OK;
 123         armv4_5_common_t *armv4_5 = target->arch_info;
 124         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 125         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 126         u32 address = ARM926EJS_CP15_ADDR(op1, op2, CRn, CRm);
 127         scan_field_t fields[4];
 128         u8 address_buf[2];
 129         u8 nr_w_buf = 0;
 130         u8 access = 1;
 131
 132         buf_set_u32(address_buf, 0, 14, address);
 133
 134         jtag_add_end_state(TAP_IDLE);
 135         if((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 136         {
 137                 return retval;
 138         }
 139         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 140
 141         fields[0].tap = jtag_info->tap;
 142         fields[0].num_bits = 32;
 143         fields[0].out_value = NULL;
 144         fields[0].out_mask = NULL;
 145         fields[0].in_value = NULL;
 146         fields[0].in_check_value = NULL;
 147         fields[0].in_check_mask = NULL;
 148         fields[0].in_handler = NULL;
 149         fields[0].in_handler_priv = NULL;
 150
 151         fields[1].tap = jtag_info->tap;
 152         fields[1].num_bits = 1;
 153         fields[1].out_value = &access;
 154         fields[1].out_mask = NULL;
 155         fields[1].in_value = &access;
 156         fields[1].in_check_value = NULL;
 157         fields[1].in_check_mask = NULL;
 158         fields[1].in_handler = NULL;
 159         fields[1].in_handler_priv = NULL;
 160
 161         fields[2].tap = jtag_info->tap;
 162         fields[2].num_bits = 14;
 163         fields[2].out_value = address_buf;
 164         fields[2].out_mask = NULL;
 165         fields[2].in_value = NULL;
 166         fields[2].in_check_value = NULL;
 167         fields[2].in_check_mask = NULL;
 168         fields[2].in_handler = NULL;
 169         fields[2].in_handler_priv = NULL;
 170
 171         fields[3].tap = jtag_info->tap;
 172         fields[3].num_bits = 1;
 173         fields[3].out_value = &nr_w_buf;
 174         fields[3].out_mask = NULL;
 175         fields[3].in_value = NULL;
 176         fields[3].in_check_value = NULL;
 177         fields[3].in_check_mask = NULL;
 178         fields[3].in_handler = NULL;
 179         fields[3].in_handler_priv = NULL;
 180
 181         jtag_add_dr_scan(4, fields, -1);
 182
 183         fields[0].in_handler_priv = value;
 184         fields[0].in_handler = arm_jtag_buf_to_u32;
 185
 186         /*TODO: add timeout*/
 187         do
 188         {
 189                 /* rescan with NOP, to wait for the access to complete */
 190                 access = 0;
 191                 nr_w_buf = 0;
 192                 jtag_add_dr_scan(4, fields, -1);
 193                 if((retval = jtag_execute_queue()) != ERROR_OK)
 194                 {
 195                         return retval;
 196                 }
 197         } while (buf_get_u32(&access, 0, 1) != 1);
 198
 199 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 200         LOG_DEBUG("addr: 0x%x value: %8.8x", address, *value);
 201 #endif
 202
 203         arm_jtag_set_instr(jtag_info, 0xc, &arm926ejs_catch_broken_irscan);
 204
 205         return ERROR_OK;
 206 }
 207
 208 int arm926ejs_cp15_write(target_t *target, u32 op1, u32 op2, u32 CRn, u32 CRm, u32 value)
 209 {
 210         int retval = ERROR_OK;
 211         armv4_5_common_t *armv4_5 = target->arch_info;
 212         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 213         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 214         u32 address = ARM926EJS_CP15_ADDR(op1, op2, CRn, CRm);
 215         scan_field_t fields[4];
 216         u8 value_buf[4];
 217         u8 address_buf[2];
 218         u8 nr_w_buf = 1;
 219         u8 access = 1;
 220
 221         buf_set_u32(address_buf, 0, 14, address);
 222         buf_set_u32(value_buf, 0, 32, value);
 223
 224         jtag_add_end_state(TAP_IDLE);
 225         if((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 226         {
 227                 return retval;
 228         }
 229         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 230
 231         fields[0].tap = jtag_info->tap;
 232         fields[0].num_bits = 32;
 233         fields[0].out_value = value_buf;
 234         fields[0].out_mask = NULL;
 235         fields[0].in_value = NULL;
 236         fields[0].in_check_value = NULL;
 237         fields[0].in_check_mask = NULL;
 238         fields[0].in_handler = NULL;
 239         fields[0].in_handler_priv = NULL;
 240
 241         fields[1].tap = jtag_info->tap;
 242         fields[1].num_bits = 1;
 243         fields[1].out_value = &access;
 244         fields[1].out_mask = NULL;
 245         fields[1].in_value = &access;
 246         fields[1].in_check_value = NULL;
 247         fields[1].in_check_mask = NULL;
 248         fields[1].in_handler = NULL;
 249         fields[1].in_handler_priv = NULL;
 250
 251         fields[2].tap = jtag_info->tap;
 252         fields[2].num_bits = 14;
 253         fields[2].out_value = address_buf;
 254         fields[2].out_mask = NULL;
 255         fields[2].in_value = NULL;
 256         fields[2].in_check_value = NULL;
 257         fields[2].in_check_mask = NULL;
 258         fields[2].in_handler = NULL;
 259         fields[2].in_handler_priv = NULL;
 260
 261         fields[3].tap = jtag_info->tap;
 262         fields[3].num_bits = 1;
 263         fields[3].out_value = &nr_w_buf;
 264         fields[3].out_mask = NULL;
 265         fields[3].in_value = NULL;
 266         fields[3].in_check_value = NULL;
 267         fields[3].in_check_mask = NULL;
 268         fields[3].in_handler = NULL;
 269         fields[3].in_handler_priv = NULL;
 270
 271         jtag_add_dr_scan(4, fields, -1);
 272         /*TODO: add timeout*/
 273         do
 274         {
 275                 /* rescan with NOP, to wait for the access to complete */
 276                 access = 0;
 277                 nr_w_buf = 0;
 278                 jtag_add_dr_scan(4, fields, -1);
 279                 if((retval = jtag_execute_queue()) != ERROR_OK)
 280                 {
 281                         return retval;
 282                 }
 283         } while (buf_get_u32(&access, 0, 1) != 1);
 284
 285 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 286         LOG_DEBUG("addr: 0x%x value: %8.8x", address, value);
 287 #endif
 288
 289         arm_jtag_set_instr(jtag_info, 0xf, &arm926ejs_catch_broken_irscan);
 290
 291         return ERROR_OK;
 292 }
 293
 294 int arm926ejs_examine_debug_reason(target_t *target)
 295 {
 296         armv4_5_common_t *armv4_5 = target->arch_info;
 297         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 298         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 299         int debug_reason;
 300         int retval;
 301
 302         embeddedice_read_reg(dbg_stat);
 303         if ((retval = jtag_execute_queue()) != ERROR_OK)
 304                 return retval;
 305
 306         debug_reason = buf_get_u32(dbg_stat->value, 6, 4);
 307
 308         switch (debug_reason)
 309         {
 310                 case 1:
 311                         LOG_DEBUG("breakpoint from EICE unit 0");
 312                         target->debug_reason = DBG_REASON_BREAKPOINT;
 313                         break;
 314                 case 2:
 315                         LOG_DEBUG("breakpoint from EICE unit 1");
 316                         target->debug_reason = DBG_REASON_BREAKPOINT;
 317                         break;
 318                 case 3:
 319                         LOG_DEBUG("soft breakpoint (BKPT instruction)");
 320                         target->debug_reason = DBG_REASON_BREAKPOINT;
 321                         break;
 322                 case 4:
 323                         LOG_DEBUG("vector catch breakpoint");
 324                         target->debug_reason = DBG_REASON_BREAKPOINT;
 325                         break;
 326                 case 5:
 327                         LOG_DEBUG("external breakpoint");
 328                         target->debug_reason = DBG_REASON_BREAKPOINT;
 329                         break;
 330                 case 6:
 331                         LOG_DEBUG("watchpoint from EICE unit 0");
 332                         target->debug_reason = DBG_REASON_WATCHPOINT;
 333                         break;
 334                 case 7:
 335                         LOG_DEBUG("watchpoint from EICE unit 1");
 336                         target->debug_reason = DBG_REASON_WATCHPOINT;
 337                         break;
 338                 case 8:
 339                         LOG_DEBUG("external watchpoint");
 340                         target->debug_reason = DBG_REASON_WATCHPOINT;
 341                         break;
 342                 case 9:
 343                         LOG_DEBUG("internal debug request");
 344                         target->debug_reason = DBG_REASON_DBGRQ;
 345                         break;
 346                 case 10:
 347                         LOG_DEBUG("external debug request");
 348                         target->debug_reason = DBG_REASON_DBGRQ;
 349                         break;
 350                 case 11:
 351                         LOG_ERROR("BUG: debug re-entry from system speed access shouldn't be handled here");
 352                         break;
 353                 case 12:
 354                         /* FIX!!!! here be dragons!!! We need to fail here so
 355                          * the target will interpreted as halted but we won't
 356                          * try to talk to it right now... a resume + halt seems
 357                          * to sync things up again. Please send an email to
 358                          * openocd development mailing list if you have hardware
 359                          * to donate to look into this problem....
 360                          */
 361                         LOG_ERROR("mystery debug reason MOE=0xc. Try issuing a resume + halt.");
 362                         target->debug_reason = DBG_REASON_DBGRQ;
 363                         retval = ERROR_TARGET_FAILURE;
 364                         break;
 365                 default:
 366                         LOG_ERROR("BUG: unknown debug reason: 0x%x", debug_reason);
 367                         target->debug_reason = DBG_REASON_DBGRQ;
 368                         /* if we fail here, we won't talk to the target and it will
 369                          * be reported to be in the halted state */
 370                         retval = ERROR_TARGET_FAILURE;
 371                         break;
 372         }
 373
 374         return retval;
 375 }
 376
 377 u32 arm926ejs_get_ttb(target_t *target)
 378 {
 379         armv4_5_common_t *armv4_5 = target->arch_info;
 380         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 381         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 382         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 383         int retval;
 384         u32 ttb = 0x0;
 385
 386         if ((retval = arm926ejs->read_cp15(target, 0, 0, 2, 0, &ttb)) != ERROR_OK)
 387                 return retval;
 388
 389         return ttb;
 390 }
 391
 392 void arm926ejs_disable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 393 {
 394         armv4_5_common_t *armv4_5 = target->arch_info;
 395         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 396         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 397         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 398         u32 cp15_control;
 399
 400         /* read cp15 control register */
 401         arm926ejs->read_cp15(target, 0, 0, 1, 0, &cp15_control);
 402         jtag_execute_queue();
 403
 404         if (mmu)
 405         {
 406                 /* invalidate TLB */
 407                 arm926ejs->write_cp15(target, 0, 0, 8, 7, 0x0);
 408
 409                 cp15_control &= ~0x1U;
 410         }
 411
 412         if (d_u_cache)
 413         {
 414                 u32 debug_override;
 415                 /* read-modify-write CP15 debug override register
 416                  * to enable "test and clean all" */
 417                 arm926ejs->read_cp15(target, 0, 0, 15, 0, &debug_override);
 418                 debug_override |= 0x80000;
 419                 arm926ejs->write_cp15(target, 0, 0, 15, 0, debug_override);
 420
 421                 /* clean and invalidate DCache */
 422                 arm926ejs->write_cp15(target, 0, 0, 7, 5, 0x0);
 423
 424                 /* write CP15 debug override register
 425                  * to disable "test and clean all" */
 426                 debug_override &= ~0x80000;
 427                 arm926ejs->write_cp15(target, 0, 0, 15, 0, debug_override);
 428
 429                 cp15_control &= ~0x4U;
 430         }
 431
 432         if (i_cache)
 433         {
 434                 /* invalidate ICache */
 435                 arm926ejs->write_cp15(target, 0, 0, 7, 5, 0x0);
 436
 437                 cp15_control &= ~0x1000U;
 438         }
 439
 440         arm926ejs->write_cp15(target, 0, 0, 1, 0, cp15_control);
 441 }
 442
 443 void arm926ejs_enable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 444 {
 445         armv4_5_common_t *armv4_5 = target->arch_info;
 446         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 447         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 448         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 449         u32 cp15_control;
 450
 451         /* read cp15 control register */
 452         arm926ejs->read_cp15(target, 0, 0, 1, 0, &cp15_control);
 453         jtag_execute_queue();
 454
 455         if (mmu)
 456                 cp15_control |= 0x1U;
 457
 458         if (d_u_cache)
 459                 cp15_control |= 0x4U;
 460
 461         if (i_cache)
 462                 cp15_control |= 0x1000U;
 463
 464         arm926ejs->write_cp15(target, 0, 0, 1, 0, cp15_control);
 465 }
 466
 467 void arm926ejs_post_debug_entry(target_t *target)
 468 {
 469         armv4_5_common_t *armv4_5 = target->arch_info;
 470         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 471         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 472         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 473
 474         /* examine cp15 control reg */
 475         arm926ejs->read_cp15(target, 0, 0, 1, 0, &arm926ejs->cp15_control_reg);
 476         jtag_execute_queue();
 477         LOG_DEBUG("cp15_control_reg: %8.8x", arm926ejs->cp15_control_reg);
 478
 479         if (arm926ejs->armv4_5_mmu.armv4_5_cache.ctype == -1)
 480         {
 481                 u32 cache_type_reg;
 482                 /* identify caches */
 483                 arm926ejs->read_cp15(target, 0, 1, 0, 0, &cache_type_reg);
 484                 jtag_execute_queue();
 485                 armv4_5_identify_cache(cache_type_reg, &arm926ejs->armv4_5_mmu.armv4_5_cache);
 486         }
 487
 488         arm926ejs->armv4_5_mmu.mmu_enabled = (arm926ejs->cp15_control_reg & 0x1U) ? 1 : 0;
 489         arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (arm926ejs->cp15_control_reg & 0x4U) ? 1 : 0;
 490         arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (arm926ejs->cp15_control_reg & 0x1000U) ? 1 : 0;
 491
 492         /* save i/d fault status and address register */
 493         arm926ejs->read_cp15(target, 0, 0, 5, 0, &arm926ejs->d_fsr);
 494         arm926ejs->read_cp15(target, 0, 1, 5, 0, &arm926ejs->i_fsr);
 495         arm926ejs->read_cp15(target, 0, 0, 6, 0, &arm926ejs->d_far);
 496
 497         LOG_DEBUG("D FSR: 0x%8.8x, D FAR: 0x%8.8x, I FSR: 0x%8.8x",
 498                 arm926ejs->d_fsr, arm926ejs->d_far, arm926ejs->i_fsr);
 499
 500         u32 cache_dbg_ctrl;
 501
 502         /* read-modify-write CP15 cache debug control register
 503          * to disable I/D-cache linefills and force WT */
 504         arm926ejs->read_cp15(target, 7, 0, 15, 0, &cache_dbg_ctrl);
 505         cache_dbg_ctrl |= 0x7;
 506         arm926ejs->write_cp15(target, 7, 0, 15, 0, cache_dbg_ctrl);
 507 }
 508
 509 void arm926ejs_pre_restore_context(target_t *target)
 510 {
 511         armv4_5_common_t *armv4_5 = target->arch_info;
 512         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 513         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 514         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 515
 516         /* restore i/d fault status and address register */
 517         arm926ejs->write_cp15(target, 0, 0, 5, 0, arm926ejs->d_fsr);
 518         arm926ejs->write_cp15(target, 0, 1, 5, 0, arm926ejs->i_fsr);
 519         arm926ejs->write_cp15(target, 0, 0, 6, 0, arm926ejs->d_far);
 520
 521         u32 cache_dbg_ctrl;
 522
 523         /* read-modify-write CP15 cache debug control register
 524          * to reenable I/D-cache linefills and disable WT */
 525         arm926ejs->read_cp15(target, 7, 0, 15, 0, &cache_dbg_ctrl);
 526         cache_dbg_ctrl &= ~0x7;
 527         arm926ejs->write_cp15(target, 7, 0, 15, 0, cache_dbg_ctrl);
 528 }
 529
 530 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)
 531 {
 532         armv4_5_common_t *armv4_5 = target->arch_info;
 533         arm7_9_common_t *arm7_9;
 534         arm9tdmi_common_t *arm9tdmi;
 535         arm926ejs_common_t *arm926ejs;
 536
 537         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 538         {
 539                 return -1;
 540         }
 541
 542         arm7_9 = armv4_5->arch_info;
 543         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 544         {
 545                 return -1;
 546         }
 547
 548         arm9tdmi = arm7_9->arch_info;
 549         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 550         {
 551                 return -1;
 552         }
 553
 554         arm926ejs = arm9tdmi->arch_info;
 555         if (arm926ejs->common_magic != ARM926EJS_COMMON_MAGIC)
 556         {
 557                 return -1;
 558         }
 559
 560         *armv4_5_p = armv4_5;
 561         *arm7_9_p = arm7_9;
 562         *arm9tdmi_p = arm9tdmi;
 563         *arm926ejs_p = arm926ejs;
 564
 565         return ERROR_OK;
 566 }
 567
 568 int arm926ejs_arch_state(struct target_s *target)
 569 {
 570         armv4_5_common_t *armv4_5 = target->arch_info;
 571         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 572         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 573         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 574
 575         char *state[] =
 576         {
 577                 "disabled", "enabled"
 578         };
 579
 580         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 581         {
 582                 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
 583                 exit(-1);
 584         }
 585
 586         LOG_USER(
 587                         "target halted in %s state due to %s, current mode: %s\n"
 588                         "cpsr: 0x%8.8x pc: 0x%8.8x\n"
 589                         "MMU: %s, D-Cache: %s, I-Cache: %s",
 590                          armv4_5_state_strings[armv4_5->core_state],
 591                          Jim_Nvp_value2name_simple( nvp_target_debug_reason,target->debug_reason)->name,
 592                          armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
 593                          buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 594                          buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
 595                          state[arm926ejs->armv4_5_mmu.mmu_enabled],
 596                          state[arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
 597                          state[arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
 598
 599         return ERROR_OK;
 600 }
 601
 602 int arm926ejs_soft_reset_halt(struct target_s *target)
 603 {
 604         int retval = ERROR_OK;
 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         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 610
 611         if((retval = target_halt(target)) != ERROR_OK)
 612         {
 613                 return retval;
 614         }
 615
 616         long long then=timeval_ms();
 617         int timeout;
 618         while (!(timeout=((timeval_ms()-then)>1000)))
 619         {
 620                 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1) == 0)
 621                 {
 622                         embeddedice_read_reg(dbg_stat);
 623                         if((retval = jtag_execute_queue()) != ERROR_OK)
 624                         {
 625                                 return retval;
 626                         }
 627                 }  else
 628                 {
 629                         break;
 630                 }
 631                 if (debug_level>=1)
 632                 {
 633                         /* do not eat all CPU, time out after 1 se*/
 634                         alive_sleep(100);
 635                 } else
 636                 {
 637                         keep_alive();
 638                 }
 639         }
 640         if (timeout)
 641         {
 642                 LOG_ERROR("Failed to halt CPU after 1 sec");
 643                 return ERROR_TARGET_TIMEOUT;
 644         }
 645
 646         target->state = TARGET_HALTED;
 647
 648         /* SVC, ARM state, IRQ and FIQ disabled */
 649         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8, 0xd3);
 650         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 651         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 652
 653         /* start fetching from 0x0 */
 654         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, 0x0);
 655         armv4_5->core_cache->reg_list[15].dirty = 1;
 656         armv4_5->core_cache->reg_list[15].valid = 1;
 657
 658         armv4_5->core_mode = ARMV4_5_MODE_SVC;
 659         armv4_5->core_state = ARMV4_5_STATE_ARM;
 660
 661         arm926ejs_disable_mmu_caches(target, 1, 1, 1);
 662         arm926ejs->armv4_5_mmu.mmu_enabled = 0;
 663         arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
 664         arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
 665
 666         return target_call_event_callbacks(target, TARGET_EVENT_HALTED);
 667 }
 668
 669 int arm926ejs_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
 670 {
 671         int retval;
 672         armv4_5_common_t *armv4_5 = target->arch_info;
 673         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 674         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 675         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 676
 677         if ((retval = arm7_9_write_memory(target, address, size, count, buffer)) != ERROR_OK)
 678                 return retval;
 679
 680         /* If ICache is enabled, we have to invalidate affected ICache lines
 681          * the DCache is forced to write-through, so we don't have to clean it here
 682          */
 683         if (arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
 684         {
 685                 if (count <= 1)
 686                 {
 687                         /* invalidate ICache single entry with MVA */
 688                         arm926ejs->write_cp15(target, 0, 1, 7, 5, address);
 689                 }
 690                 else
 691                 {
 692                         /* invalidate ICache */
 693                         arm926ejs->write_cp15(target, 0, 0, 7, 5, address);
 694                 }
 695         }
 696
 697         return retval;
 698 }
 699
 700 int arm926ejs_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 701 {
 702         arm9tdmi_init_target(cmd_ctx, target);
 703
 704         return ERROR_OK;
 705 }
 706
 707 int arm926ejs_quit(void)
 708 {
 709         return ERROR_OK;
 710 }
 711
 712 int arm926ejs_init_arch_info(target_t *target, arm926ejs_common_t *arm926ejs, jtag_tap_t *tap)
 713 {
 714         arm9tdmi_common_t *arm9tdmi = &arm926ejs->arm9tdmi_common;
 715         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 716
 717         /* initialize arm9tdmi specific info (including arm7_9 and armv4_5)
 718          */
 719         arm9tdmi_init_arch_info(target, arm9tdmi, tap);
 720
 721         arm9tdmi->arch_info = arm926ejs;
 722         arm926ejs->common_magic = ARM926EJS_COMMON_MAGIC;
 723
 724         arm7_9->post_debug_entry = arm926ejs_post_debug_entry;
 725         arm7_9->pre_restore_context = arm926ejs_pre_restore_context;
 726
 727         arm926ejs->read_cp15 = arm926ejs_cp15_read;
 728         arm926ejs->write_cp15 = arm926ejs_cp15_write;
 729         arm926ejs->armv4_5_mmu.armv4_5_cache.ctype = -1;
 730         arm926ejs->armv4_5_mmu.get_ttb = arm926ejs_get_ttb;
 731         arm926ejs->armv4_5_mmu.read_memory = arm7_9_read_memory;
 732         arm926ejs->armv4_5_mmu.write_memory = arm7_9_write_memory;
 733         arm926ejs->armv4_5_mmu.disable_mmu_caches = arm926ejs_disable_mmu_caches;
 734         arm926ejs->armv4_5_mmu.enable_mmu_caches = arm926ejs_enable_mmu_caches;
 735         arm926ejs->armv4_5_mmu.has_tiny_pages = 1;
 736         arm926ejs->armv4_5_mmu.mmu_enabled = 0;
 737
 738         arm7_9->examine_debug_reason = arm926ejs_examine_debug_reason;
 739
 740         /* The ARM926EJ-S implements the ARMv5TE architecture which
 741          * has the BKPT instruction, so we don't have to use a watchpoint comparator
 742          */
 743         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
 744         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
 745
 746         return ERROR_OK;
 747 }
 748
 749 int arm926ejs_target_create(struct target_s *target, Jim_Interp *interp)
 750 {
 751         arm926ejs_common_t *arm926ejs = calloc(1,sizeof(arm926ejs_common_t));
 752
 753         arm926ejs_init_arch_info(target, arm926ejs, target->tap);
 754
 755         return ERROR_OK;
 756 }
 757
 758 int arm926ejs_register_commands(struct command_context_s *cmd_ctx)
 759 {
 760         int retval;
 761         command_t *arm926ejs_cmd;
 762
 763
 764         retval = arm9tdmi_register_commands(cmd_ctx);
 765
 766         arm926ejs_cmd = register_command(cmd_ctx, NULL, "arm926ejs", NULL, COMMAND_ANY, "arm926ejs specific commands");
 767
 768         register_command(cmd_ctx, arm926ejs_cmd, "cp15", arm926ejs_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <opcode_1> <opcode_2> <CRn> <CRm> [value]");
 769
 770         register_command(cmd_ctx, arm926ejs_cmd, "cache_info", arm926ejs_handle_cache_info_command, COMMAND_EXEC, "display information about target caches");
 771         register_command(cmd_ctx, arm926ejs_cmd, "virt2phys", arm926ejs_handle_virt2phys_command, COMMAND_EXEC, "translate va to pa <va>");
 772
 773         register_command(cmd_ctx, arm926ejs_cmd, "mdw_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory words <physical addr> [count]");
 774         register_command(cmd_ctx, arm926ejs_cmd, "mdh_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory half-words <physical addr> [count]");
 775         register_command(cmd_ctx, arm926ejs_cmd, "mdb_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory bytes <physical addr> [count]");
 776
 777         register_command(cmd_ctx, arm926ejs_cmd, "mww_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory word <physical addr> <value>");
 778         register_command(cmd_ctx, arm926ejs_cmd, "mwh_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory half-word <physical addr> <value>");
 779         register_command(cmd_ctx, arm926ejs_cmd, "mwb_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory byte <physical addr> <value>");
 780
 781         return retval;
 782 }
 783
 784 int arm926ejs_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 785 {
 786         int retval;
 787         target_t *target = get_current_target(cmd_ctx);
 788         armv4_5_common_t *armv4_5;
 789         arm7_9_common_t *arm7_9;
 790         arm9tdmi_common_t *arm9tdmi;
 791         arm926ejs_common_t *arm926ejs;
 792         int opcode_1;
 793         int opcode_2;
 794         int CRn;
 795         int CRm;
 796
 797         if ((argc < 4) || (argc > 5))
 798         {
 799                 command_print(cmd_ctx, "usage: arm926ejs cp15 <opcode_1> <opcode_2> <CRn> <CRm> [value]");
 800                 return ERROR_OK;
 801         }
 802
 803         opcode_1 = strtoul(args[0], NULL, 0);
 804         opcode_2 = strtoul(args[1], NULL, 0);
 805         CRn = strtoul(args[2], NULL, 0);
 806         CRm = strtoul(args[3], NULL, 0);
 807
 808         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 809         {
 810                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 811                 return ERROR_OK;
 812         }
 813
 814         if (target->state != TARGET_HALTED)
 815         {
 816                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 817                 return ERROR_OK;
 818         }
 819
 820         if (argc == 4)
 821         {
 822                 u32 value;
 823                 if ((retval = arm926ejs->read_cp15(target, opcode_1, opcode_2, CRn, CRm, &value)) != ERROR_OK)
 824                 {
 825                         command_print(cmd_ctx, "couldn't access register");
 826                         return ERROR_OK;
 827                 }
 828                 if((retval = jtag_execute_queue()) != ERROR_OK)
 829                 {
 830                         return retval;
 831                 }
 832
 833                 command_print(cmd_ctx, "%i %i %i %i: %8.8x", opcode_1, opcode_2, CRn, CRm, value);
 834         }
 835         else
 836         {
 837                 u32 value = strtoul(args[4], NULL, 0);
 838                 if ((retval = arm926ejs->write_cp15(target, opcode_1, opcode_2, CRn, CRm, value)) != ERROR_OK)
 839                 {
 840                         command_print(cmd_ctx, "couldn't access register");
 841                         return ERROR_OK;
 842                 }
 843                 command_print(cmd_ctx, "%i %i %i %i: %8.8x", opcode_1, opcode_2, CRn, CRm, value);
 844         }
 845
 846         return ERROR_OK;
 847 }
 848
 849 int arm926ejs_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 850 {
 851         target_t *target = get_current_target(cmd_ctx);
 852         armv4_5_common_t *armv4_5;
 853         arm7_9_common_t *arm7_9;
 854         arm9tdmi_common_t *arm9tdmi;
 855         arm926ejs_common_t *arm926ejs;
 856
 857         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 858         {
 859                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 860                 return ERROR_OK;
 861         }
 862
 863         return armv4_5_handle_cache_info_command(cmd_ctx, &arm926ejs->armv4_5_mmu.armv4_5_cache);
 864 }
 865
 866 int arm926ejs_handle_virt2phys_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_virt2phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 890 }
 891
 892 int arm926ejs_handle_md_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 893 {
 894         target_t *target = get_current_target(cmd_ctx);
 895         armv4_5_common_t *armv4_5;
 896         arm7_9_common_t *arm7_9;
 897         arm9tdmi_common_t *arm9tdmi;
 898         arm926ejs_common_t *arm926ejs;
 899         arm_jtag_t *jtag_info;
 900
 901         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 902         {
 903                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 904                 return ERROR_OK;
 905         }
 906
 907         jtag_info = &arm7_9->jtag_info;
 908
 909         if (target->state != TARGET_HALTED)
 910         {
 911                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 912                 return ERROR_OK;
 913         }
 914
 915         return armv4_5_mmu_handle_md_phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 916 }
 917
 918 int arm926ejs_handle_mw_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 919 {
 920         target_t *target = get_current_target(cmd_ctx);
 921         armv4_5_common_t *armv4_5;
 922         arm7_9_common_t *arm7_9;
 923         arm9tdmi_common_t *arm9tdmi;
 924         arm926ejs_common_t *arm926ejs;
 925         arm_jtag_t *jtag_info;
 926
 927         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 928         {
 929                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 930                 return ERROR_OK;
 931         }
 932
 933         jtag_info = &arm7_9->jtag_info;
 934
 935         if (target->state != TARGET_HALTED)
 936         {
 937                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 938                 return ERROR_OK;
 939         }
 940
 941         return armv4_5_mmu_handle_mw_phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 942 }
 943
 944 static int arm926ejs_virt2phys(struct target_s *target, u32 virtual, u32 *physical)
 945 {
 946         int retval;
 947         int type;
 948         u32 cb;
 949         int domain;
 950         u32 ap;
 951
 952         armv4_5_common_t *armv4_5;
 953         arm7_9_common_t *arm7_9;
 954         arm9tdmi_common_t *arm9tdmi;
 955         arm926ejs_common_t *arm926ejs;
 956         retval= arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs);
 957         if (retval != ERROR_OK)
 958         {
 959                 return retval;
 960         }
 961         u32 ret = armv4_5_mmu_translate_va(target, &arm926ejs->armv4_5_mmu, virtual, &type, &cb, &domain, &ap);
 962         if (type == -1)
 963         {
 964                 return ret;
 965         }
 966         *physical = ret;
 967         return ERROR_OK;
 968 }
 969
 970 static int arm926ejs_mmu(struct target_s *target, int *enabled)
 971 {
 972         armv4_5_common_t *armv4_5 = target->arch_info;
 973         arm926ejs_common_t *arm926ejs = armv4_5->arch_info;
 974
 975         if (target->state != TARGET_HALTED)
 976         {
 977                 LOG_ERROR("Target not halted");
 978                 return ERROR_TARGET_INVALID;
 979         }
 980         *enabled = arm926ejs->armv4_5_mmu.mmu_enabled;
 981         return ERROR_OK;
 982 }