src/target/arm926ejs.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "arm926ejs.h"
  25 #include "jtag.h"
  26 #include "log.h"
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #if 0
  32 #define _DEBUG_INSTRUCTION_EXECUTION_
  33 #endif
  34
  35 /* cli handling */
  36 int arm926ejs_register_commands(struct command_context_s *cmd_ctx);
  37
  38 int arm926ejs_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  39 int arm926ejs_handle_cp15i_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  40 int arm926ejs_handle_virt2phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  41 int arm926ejs_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  42 int arm926ejs_handle_md_phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  43 int arm926ejs_handle_mw_phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  44
  45 int arm926ejs_handle_read_cache_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  46 int arm926ejs_handle_read_mmu_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  47
  48 /* forward declarations */
  49 int arm926ejs_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
  50 int arm926ejs_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  51 int arm926ejs_quit();
  52 int arm926ejs_arch_state(struct target_s *target, char *buf, int buf_size);
  53 int arm926ejs_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  54 int arm926ejs_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  55 int arm926ejs_soft_reset_halt(struct target_s *target);
  56
  57 #define ARM926EJS_CP15_ADDR(opcode_1, opcode_2, CRn, CRm) ((opcode_1 << 11) | (opcode_2 << 8) | (CRn << 4) | (CRm << 0))
  58
  59 target_type_t arm926ejs_target =
  60 {
  61         .name = "arm926ejs",
  62
  63         .poll = arm7_9_poll,
  64         .arch_state = arm926ejs_arch_state,
  65
  66         .halt = arm7_9_halt,
  67         .resume = arm7_9_resume,
  68         .step = arm7_9_step,
  69
  70         .assert_reset = arm7_9_assert_reset,
  71         .deassert_reset = arm7_9_deassert_reset,
  72         .soft_reset_halt = arm926ejs_soft_reset_halt,
  73
  74         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  75
  76         .read_memory = arm7_9_read_memory,
  77         .write_memory = arm926ejs_write_memory,
  78         .bulk_write_memory = arm7_9_bulk_write_memory,
  79
  80         .run_algorithm = armv4_5_run_algorithm,
  81
  82         .add_breakpoint = arm7_9_add_breakpoint,
  83         .remove_breakpoint = arm7_9_remove_breakpoint,
  84         .add_watchpoint = arm7_9_add_watchpoint,
  85         .remove_watchpoint = arm7_9_remove_watchpoint,
  86
  87         .register_commands = arm926ejs_register_commands,
  88         .target_command = arm926ejs_target_command,
  89         .init_target = arm926ejs_init_target,
  90         .quit = arm926ejs_quit
  91 };
  92
  93 int arm926ejs_read_cp15(target_t *target, u32 address, u32 *value)
  94 {
  95         armv4_5_common_t *armv4_5 = target->arch_info;
  96         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
  97         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
  98         scan_field_t fields[4];
  99         u8 address_buf[2];
 100         u8 nr_w_buf = 0;
 101         u8 access = 1;
 102
 103         buf_set_u32(address_buf, 0, 14, address);
 104
 105         jtag_add_end_state(TAP_RTI);
 106         arm_jtag_scann(jtag_info, 0xf);
 107         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr);
 108
 109         fields[0].device = jtag_info->chain_pos;
 110         fields[0].num_bits = 32;
 111         fields[0].out_value = NULL;
 112         fields[0].out_mask = NULL;
 113         fields[0].in_value = NULL;
 114         fields[0].in_check_value = NULL;
 115         fields[0].in_check_mask = NULL;
 116         fields[0].in_handler = NULL;
 117         fields[0].in_handler_priv = NULL;
 118
 119         fields[1].device = jtag_info->chain_pos;
 120         fields[1].num_bits = 1;
 121         fields[1].out_value = &access;
 122         fields[1].out_mask = NULL;
 123         fields[1].in_value = &access;
 124         fields[1].in_check_value = NULL;
 125         fields[1].in_check_mask = NULL;
 126         fields[1].in_handler = NULL;
 127         fields[1].in_handler_priv = NULL;
 128
 129         fields[2].device = jtag_info->chain_pos;
 130         fields[2].num_bits = 14;
 131         fields[2].out_value = address_buf;
 132         fields[2].out_mask = NULL;
 133         fields[2].in_value = NULL;
 134         fields[2].in_check_value = NULL;
 135         fields[2].in_check_mask = NULL;
 136         fields[2].in_handler = NULL;
 137         fields[2].in_handler_priv = NULL;
 138
 139         fields[3].device = jtag_info->chain_pos;
 140         fields[3].num_bits = 1;
 141         fields[3].out_value = &nr_w_buf;
 142         fields[3].out_mask = NULL;
 143         fields[3].in_value = NULL;
 144         fields[3].in_check_value = NULL;
 145         fields[3].in_check_mask = NULL;
 146         fields[3].in_handler = NULL;
 147         fields[3].in_handler_priv = NULL;
 148
 149         jtag_add_dr_scan(4, fields, -1);
 150
 151         /* rescan with NOP, to wait for the access to complete */
 152         access = 0;
 153
 154         fields[0].in_handler_priv = value;
 155         fields[0].in_handler = arm_jtag_buf_to_u32;
 156
 157         do
 158         {
 159                 jtag_add_dr_scan(4, fields, -1);
 160                 jtag_execute_queue();
 161         } while ((access & 1) != 1);
 162
 163 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 164         DEBUG("addr: 0x%x value: %8.8x", address, *value);
 165 #endif
 166
 167         return ERROR_OK;
 168 }
 169
 170 int arm926ejs_write_cp15(target_t *target, u32 address, u32 value)
 171 {
 172         armv4_5_common_t *armv4_5 = target->arch_info;
 173         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 174         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 175         scan_field_t fields[4];
 176         u8 value_buf[4];
 177         u8 address_buf[2];
 178         u8 nr_w_buf = 1;
 179         u8 access = 1;
 180
 181         buf_set_u32(address_buf, 0, 14, address);
 182         buf_set_u32(value_buf, 0, 32, value);
 183
 184         jtag_add_end_state(TAP_RTI);
 185         arm_jtag_scann(jtag_info, 0xf);
 186         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr);
 187
 188         fields[0].device = jtag_info->chain_pos;
 189         fields[0].num_bits = 32;
 190         fields[0].out_value = value_buf;
 191         fields[0].out_mask = NULL;
 192         fields[0].in_value = NULL;
 193         fields[0].in_check_value = NULL;
 194         fields[0].in_check_mask = NULL;
 195         fields[0].in_handler = NULL;
 196         fields[0].in_handler_priv = NULL;
 197
 198         fields[1].device = jtag_info->chain_pos;
 199         fields[1].num_bits = 1;
 200         fields[1].out_value = &access;
 201         fields[1].out_mask = NULL;
 202         fields[1].in_value = &access;
 203         fields[1].in_check_value = NULL;
 204         fields[1].in_check_mask = NULL;
 205         fields[1].in_handler = NULL;
 206         fields[1].in_handler_priv = NULL;
 207
 208         fields[2].device = jtag_info->chain_pos;
 209         fields[2].num_bits = 14;
 210         fields[2].out_value = address_buf;
 211         fields[2].out_mask = NULL;
 212         fields[2].in_value = NULL;
 213         fields[2].in_check_value = NULL;
 214         fields[2].in_check_mask = NULL;
 215         fields[2].in_handler = NULL;
 216         fields[2].in_handler_priv = NULL;
 217
 218         fields[3].device = jtag_info->chain_pos;
 219         fields[3].num_bits = 1;
 220         fields[3].out_value = &nr_w_buf;
 221         fields[3].out_mask = NULL;
 222         fields[3].in_value = NULL;
 223         fields[3].in_check_value = NULL;
 224         fields[3].in_check_mask = NULL;
 225         fields[3].in_handler = NULL;
 226         fields[3].in_handler_priv = NULL;
 227
 228         jtag_add_dr_scan(4, fields, -1);
 229
 230         /* rescan with NOP, to wait for the access to complete */
 231         access = 0;
 232
 233         do
 234         {
 235                 jtag_add_dr_scan(4, fields, -1);
 236                 jtag_execute_queue();
 237         } while (access != 1);
 238
 239 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 240         DEBUG("addr: 0x%x value: %8.8x", address, value);
 241 #endif
 242
 243         return ERROR_OK;
 244 }
 245
 246 int arm926ejs_examine_debug_reason(target_t *target)
 247 {
 248         armv4_5_common_t *armv4_5 = target->arch_info;
 249         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 250         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 251         int debug_reason;
 252         int retval;
 253
 254         embeddedice_read_reg(dbg_stat);
 255         if ((retval = jtag_execute_queue()) != ERROR_OK)
 256                 return retval;
 257
 258         debug_reason = buf_get_u32(dbg_stat->value, 6, 4);
 259
 260         switch (debug_reason)
 261         {
 262                 case 1:
 263                         DEBUG("breakpoint from EICE unit 0");
 264                         target->debug_reason = DBG_REASON_BREAKPOINT;
 265                         break;
 266                 case 2:
 267                         DEBUG("breakpoint from EICE unit 1");
 268                         target->debug_reason = DBG_REASON_BREAKPOINT;
 269                         break;
 270                 case 3:
 271                         DEBUG("soft breakpoint (BKPT instruction)");
 272                         target->debug_reason = DBG_REASON_BREAKPOINT;
 273                         break;
 274                 case 4:
 275                         DEBUG("vector catch breakpoint");
 276                         target->debug_reason = DBG_REASON_BREAKPOINT;
 277                         break;
 278                 case 5:
 279                         DEBUG("external breakpoint");
 280                         target->debug_reason = DBG_REASON_BREAKPOINT;
 281                         break;
 282                 case 6:
 283                         DEBUG("watchpoint from EICE unit 0");
 284                         target->debug_reason = DBG_REASON_WATCHPOINT;
 285                         break;
 286                 case 7:
 287                         DEBUG("watchpoint from EICE unit 1");
 288                         target->debug_reason = DBG_REASON_WATCHPOINT;
 289                         break;
 290                 case 8:
 291                         DEBUG("external watchpoint");
 292                         target->debug_reason = DBG_REASON_WATCHPOINT;
 293                         break;
 294                 case 9:
 295                         DEBUG("internal debug request");
 296                         target->debug_reason = DBG_REASON_DBGRQ;
 297                         break;
 298                 case 10:
 299                         DEBUG("external debug request");
 300                         target->debug_reason = DBG_REASON_DBGRQ;
 301                         break;
 302                 case 11:
 303                         ERROR("BUG: debug re-entry from system speed access shouldn't be handled here");
 304                         break;
 305                 default:
 306                         ERROR("BUG: unknown debug reason: 0x%x", debug_reason);
 307                         target->debug_reason = DBG_REASON_DBGRQ;
 308         }
 309
 310         return ERROR_OK;
 311 }
 312
 313 u32 arm926ejs_get_ttb(target_t *target)
 314 {
 315         int retval;
 316         u32 ttb = 0x0;
 317
 318         if ((retval = arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 2, 0), &ttb)) != ERROR_OK)
 319                 return retval;
 320
 321         return ttb;
 322 }
 323
 324 void arm926ejs_disable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 325 {
 326         u32 cp15_control;
 327
 328         /* read cp15 control register */
 329         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 1, 0), &cp15_control);
 330         jtag_execute_queue();
 331
 332         if (mmu)
 333         {
 334                 /* invalidate TLB */
 335                 arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 8, 7), 0x0);
 336
 337                 cp15_control &= ~0x1U;
 338         }
 339
 340         if (d_u_cache)
 341         {
 342                 u32 debug_override;
 343                 /* read-modify-write CP15 debug override register
 344                  * to enable "test and clean all" */
 345                 arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 15, 0), &debug_override);
 346                 debug_override |= 0x80000;
 347                 arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 15, 0), debug_override);
 348
 349                 /* clean and invalidate DCache */
 350                 arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 7, 5), 0x0);
 351
 352                 /* write CP15 debug override register
 353                  * to disable "test and clean all" */
 354                 debug_override &= ~0x80000;
 355                 arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 15, 0), debug_override);
 356
 357                 cp15_control &= ~0x4U;
 358         }
 359
 360         if (i_cache)
 361         {
 362                 /* invalidate ICache */
 363                 arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 7, 5), 0x0);
 364
 365                 cp15_control &= ~0x1000U;
 366         }
 367
 368         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 1, 0), cp15_control);
 369 }
 370
 371 void arm926ejs_enable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 372 {
 373         u32 cp15_control;
 374
 375         /* read cp15 control register */
 376         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 1, 0), &cp15_control);
 377         jtag_execute_queue();
 378
 379         if (mmu)
 380                 cp15_control |= 0x1U;
 381
 382         if (d_u_cache)
 383                 cp15_control |= 0x4U;
 384
 385         if (i_cache)
 386                 cp15_control |= 0x1000U;
 387
 388         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 1, 0), cp15_control);
 389 }
 390
 391 void arm926ejs_post_debug_entry(target_t *target)
 392 {
 393         armv4_5_common_t *armv4_5 = target->arch_info;
 394         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 395         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 396         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 397
 398         /* examine cp15 control reg */
 399         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 1, 0), &arm926ejs->cp15_control_reg);
 400         jtag_execute_queue();
 401         DEBUG("cp15_control_reg: %8.8x", arm926ejs->cp15_control_reg);
 402
 403         if (arm926ejs->armv4_5_mmu.armv4_5_cache.ctype == -1)
 404         {
 405                 u32 cache_type_reg;
 406                 /* identify caches */
 407                 arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 1, 0, 0), &cache_type_reg);
 408                 jtag_execute_queue();
 409                 armv4_5_identify_cache(cache_type_reg, &arm926ejs->armv4_5_mmu.armv4_5_cache);
 410         }
 411
 412         arm926ejs->armv4_5_mmu.mmu_enabled = (arm926ejs->cp15_control_reg & 0x1U) ? 1 : 0;
 413         arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (arm926ejs->cp15_control_reg & 0x4U) ? 1 : 0;
 414         arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (arm926ejs->cp15_control_reg & 0x1000U) ? 1 : 0;
 415
 416         /* save i/d fault status and address register */
 417         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 5, 0), &arm926ejs->d_fsr);
 418         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 1, 5, 0), &arm926ejs->i_fsr);
 419         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 6, 0), &arm926ejs->d_far);
 420
 421         DEBUG("D FSR: 0x%8.8x, D FAR: 0x%8.8x, I FSR: 0x%8.8x",
 422                 arm926ejs->d_fsr, arm926ejs->d_far, arm926ejs->i_fsr);
 423
 424
 425         u32 cache_dbg_ctrl;
 426
 427         /* read-modify-write CP15 cache debug control register
 428          * to disable I/D-cache linefills and force WT */
 429         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(7, 0, 15, 0), &cache_dbg_ctrl);
 430         cache_dbg_ctrl |= 0x7;
 431         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(7, 0, 15, 0), cache_dbg_ctrl);
 432
 433 }
 434
 435 void arm926ejs_pre_restore_context(target_t *target)
 436 {
 437         armv4_5_common_t *armv4_5 = target->arch_info;
 438         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 439         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 440         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 441
 442         /* restore i/d fault status and address register */
 443         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 5, 0), arm926ejs->d_fsr);
 444         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 1, 5, 0), arm926ejs->i_fsr);
 445         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 6, 0), arm926ejs->d_far);
 446
 447         u32 cache_dbg_ctrl;
 448
 449         /* read-modify-write CP15 cache debug control register
 450          * to reenable I/D-cache linefills and disable WT */
 451         arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(7, 0, 15, 0), &cache_dbg_ctrl);
 452         cache_dbg_ctrl |= 0x7;
 453         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(7, 0, 15, 0), cache_dbg_ctrl);
 454 }
 455
 456 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)
 457 {
 458         armv4_5_common_t *armv4_5 = target->arch_info;
 459         arm7_9_common_t *arm7_9;
 460         arm9tdmi_common_t *arm9tdmi;
 461         arm926ejs_common_t *arm926ejs;
 462
 463         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 464         {
 465                 return -1;
 466         }
 467
 468         arm7_9 = armv4_5->arch_info;
 469         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 470         {
 471                 return -1;
 472         }
 473
 474         arm9tdmi = arm7_9->arch_info;
 475         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 476         {
 477                 return -1;
 478         }
 479
 480         arm926ejs = arm9tdmi->arch_info;
 481         if (arm926ejs->common_magic != ARM926EJS_COMMON_MAGIC)
 482         {
 483                 return -1;
 484         }
 485
 486         *armv4_5_p = armv4_5;
 487         *arm7_9_p = arm7_9;
 488         *arm9tdmi_p = arm9tdmi;
 489         *arm926ejs_p = arm926ejs;
 490
 491         return ERROR_OK;
 492 }
 493
 494 int arm926ejs_arch_state(struct target_s *target, char *buf, int buf_size)
 495 {
 496         armv4_5_common_t *armv4_5 = target->arch_info;
 497         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 498         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 499         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 500
 501         char *state[] =
 502         {
 503                 "disabled", "enabled"
 504         };
 505
 506         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 507         {
 508                 ERROR("BUG: called for a non-ARMv4/5 target");
 509                 exit(-1);
 510         }
 511
 512         snprintf(buf, buf_size,
 513                         "target halted in %s state due to %s, current mode: %s\n"
 514                         "cpsr: 0x%8.8x pc: 0x%8.8x\n"
 515                         "MMU: %s, D-Cache: %s, I-Cache: %s",
 516                          armv4_5_state_strings[armv4_5->core_state],
 517                          target_debug_reason_strings[target->debug_reason],
 518                          armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
 519                          buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 520                          buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
 521                          state[arm926ejs->armv4_5_mmu.mmu_enabled],
 522                          state[arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
 523                          state[arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
 524
 525         return ERROR_OK;
 526 }
 527
 528 int arm926ejs_soft_reset_halt(struct target_s *target)
 529 {
 530         armv4_5_common_t *armv4_5 = target->arch_info;
 531         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 532         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 533         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 534         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 535
 536         if (target->state == TARGET_RUNNING)
 537         {
 538                 target->type->halt(target);
 539         }
 540
 541         while (buf_get_u32(dbg_stat->value, EICE_DBG_CONTROL_DBGACK, 1) == 0)
 542         {
 543                 embeddedice_read_reg(dbg_stat);
 544                 jtag_execute_queue();
 545         }
 546
 547         target->state = TARGET_HALTED;
 548
 549         /* SVC, ARM state, IRQ and FIQ disabled */
 550         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8, 0xd3);
 551         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 552         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 553
 554         /* start fetching from 0x0 */
 555         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, 0x0);
 556         armv4_5->core_cache->reg_list[15].dirty = 1;
 557         armv4_5->core_cache->reg_list[15].valid = 1;
 558
 559         armv4_5->core_mode = ARMV4_5_MODE_SVC;
 560         armv4_5->core_state = ARMV4_5_STATE_ARM;
 561
 562         arm926ejs_disable_mmu_caches(target, 1, 1, 1);
 563         arm926ejs->armv4_5_mmu.mmu_enabled = 0;
 564         arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
 565         arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
 566
 567         target_call_event_callbacks(target, TARGET_EVENT_HALTED);
 568
 569         return ERROR_OK;
 570 }
 571
 572 int arm926ejs_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
 573 {
 574         int retval;
 575         armv4_5_common_t *armv4_5 = target->arch_info;
 576         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 577         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 578         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 579
 580         if ((retval = arm7_9_write_memory(target, address, size, count, buffer)) != ERROR_OK)
 581                 return retval;
 582
 583         /* If ICache is enabled, we have to invalidate affected ICache lines
 584          * the DCache is forced to write-through, so we don't have to clean it here
 585          */
 586         if (arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
 587         {
 588                 if (count <= 1)
 589                 {
 590                         /* invalidate ICache single entry with MVA */
 591                         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 1, 7, 5), address);
 592                 }
 593                 else
 594                 {
 595                         /* invalidate ICache */
 596                         arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(0, 0, 7, 5), address);
 597                 }
 598         }
 599
 600         return retval;
 601 }
 602
 603 int arm926ejs_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 604 {
 605         arm9tdmi_init_target(cmd_ctx, target);
 606
 607         return ERROR_OK;
 608
 609 }
 610
 611 int arm926ejs_quit()
 612 {
 613
 614         return ERROR_OK;
 615 }
 616
 617 int arm926ejs_init_arch_info(target_t *target, arm926ejs_common_t *arm926ejs, int chain_pos, char *variant)
 618 {
 619         arm9tdmi_common_t *arm9tdmi = &arm926ejs->arm9tdmi_common;
 620         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 621
 622         /* initialize arm9tdmi specific info (including arm7_9 and armv4_5)
 623          */
 624         arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
 625
 626         arm9tdmi->arch_info = arm926ejs;
 627         arm926ejs->common_magic = ARM926EJS_COMMON_MAGIC;
 628
 629         arm7_9->post_debug_entry = arm926ejs_post_debug_entry;
 630         arm7_9->pre_restore_context = arm926ejs_pre_restore_context;
 631
 632         arm926ejs->armv4_5_mmu.armv4_5_cache.ctype = -1;
 633         arm926ejs->armv4_5_mmu.get_ttb = arm926ejs_get_ttb;
 634         arm926ejs->armv4_5_mmu.read_memory = arm7_9_read_memory;
 635         arm926ejs->armv4_5_mmu.write_memory = arm7_9_write_memory;
 636         arm926ejs->armv4_5_mmu.disable_mmu_caches = arm926ejs_disable_mmu_caches;
 637         arm926ejs->armv4_5_mmu.enable_mmu_caches = arm926ejs_enable_mmu_caches;
 638         arm926ejs->armv4_5_mmu.has_tiny_pages = 1;
 639         arm926ejs->armv4_5_mmu.mmu_enabled = 0;
 640
 641         arm7_9->examine_debug_reason = arm926ejs_examine_debug_reason;
 642
 643         return ERROR_OK;
 644 }
 645
 646 int arm926ejs_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
 647 {
 648         int chain_pos;
 649         char *variant = NULL;
 650         arm926ejs_common_t *arm926ejs = malloc(sizeof(arm926ejs_common_t));
 651
 652         if (argc < 4)
 653         {
 654                 ERROR("'target arm926ejs' requires at least one additional argument");
 655                 exit(-1);
 656         }
 657
 658         chain_pos = strtoul(args[3], NULL, 0);
 659
 660         if (argc >= 5)
 661                 variant = args[4];
 662
 663         DEBUG("chain_pos: %i, variant: %s", chain_pos, variant);
 664
 665         arm926ejs_init_arch_info(target, arm926ejs, chain_pos, variant);
 666
 667         return ERROR_OK;
 668 }
 669
 670 int arm926ejs_register_commands(struct command_context_s *cmd_ctx)
 671 {
 672         int retval;
 673         command_t *arm926ejs_cmd;
 674
 675
 676         retval = arm9tdmi_register_commands(cmd_ctx);
 677
 678         arm926ejs_cmd = register_command(cmd_ctx, NULL, "arm926ejs", NULL, COMMAND_ANY, "arm926ejs specific commands");
 679
 680         register_command(cmd_ctx, arm926ejs_cmd, "cp15", arm926ejs_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <opcode_1> <opcode_2> <CRn> <CRm> [value]");
 681
 682         register_command(cmd_ctx, arm926ejs_cmd, "cache_info", arm926ejs_handle_cache_info_command, COMMAND_EXEC, "display information about target caches");
 683         register_command(cmd_ctx, arm926ejs_cmd, "virt2phys", arm926ejs_handle_virt2phys_command, COMMAND_EXEC, "translate va to pa <va>");
 684
 685         register_command(cmd_ctx, arm926ejs_cmd, "mdw_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory words <physical addr> [count]");
 686         register_command(cmd_ctx, arm926ejs_cmd, "mdh_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory half-words <physical addr> [count]");
 687         register_command(cmd_ctx, arm926ejs_cmd, "mdb_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory bytes <physical addr> [count]");
 688
 689         register_command(cmd_ctx, arm926ejs_cmd, "mww_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory word <physical addr> <value>");
 690         register_command(cmd_ctx, arm926ejs_cmd, "mwh_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory half-word <physical addr> <value>");
 691         register_command(cmd_ctx, arm926ejs_cmd, "mwb_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory byte <physical addr> <value>");
 692
 693         return ERROR_OK;
 694 }
 695
 696 int arm926ejs_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 697 {
 698         int retval;
 699         target_t *target = get_current_target(cmd_ctx);
 700         armv4_5_common_t *armv4_5;
 701         arm7_9_common_t *arm7_9;
 702         arm9tdmi_common_t *arm9tdmi;
 703         arm926ejs_common_t *arm926ejs;
 704         int opcode_1 = strtoul(args[0], NULL, 0);
 705         int opcode_2 = strtoul(args[1], NULL, 0);
 706         int CRn = strtoul(args[2], NULL, 0);
 707         int CRm = strtoul(args[3], NULL, 0);
 708
 709         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 710         {
 711                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 712                 return ERROR_OK;
 713         }
 714
 715         if (target->state != TARGET_HALTED)
 716         {
 717                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 718                 return ERROR_OK;
 719         }
 720
 721         if ((argc < 4) || (argc > 5))
 722         {
 723                 command_print(cmd_ctx, "usage: arm926ejs cp15 <opcode_1> <opcode_2> <CRn> <CRm> [value]");
 724         }
 725
 726         if (argc == 4)
 727         {
 728                 u32 value;
 729                 if ((retval = arm926ejs_read_cp15(target, ARM926EJS_CP15_ADDR(opcode_1, opcode_2, CRn, CRm), &value)) != ERROR_OK)
 730                 {
 731                         command_print(cmd_ctx, "couldn't access register");
 732                         return ERROR_OK;
 733                 }
 734                 jtag_execute_queue();
 735
 736                 command_print(cmd_ctx, "%i %i %i %i: %8.8x", opcode_1, opcode_2, CRn, CRm, value);
 737         }
 738         else
 739         {
 740                 u32 value = strtoul(args[4], NULL, 0);
 741                 if ((retval = arm926ejs_write_cp15(target, ARM926EJS_CP15_ADDR(opcode_1, opcode_2, CRn, CRm), value)) != ERROR_OK)
 742                 {
 743                         command_print(cmd_ctx, "couldn't access register");
 744                         return ERROR_OK;
 745                 }
 746                 command_print(cmd_ctx, "%i %i %i %i: %8.8x", opcode_1, opcode_2, CRn, CRm, value);
 747         }
 748
 749         return ERROR_OK;
 750 }
 751
 752 int arm926ejs_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 753 {
 754         target_t *target = get_current_target(cmd_ctx);
 755         armv4_5_common_t *armv4_5;
 756         arm7_9_common_t *arm7_9;
 757         arm9tdmi_common_t *arm9tdmi;
 758         arm926ejs_common_t *arm926ejs;
 759
 760         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 761         {
 762                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 763                 return ERROR_OK;
 764         }
 765
 766         return armv4_5_handle_cache_info_command(cmd_ctx, &arm926ejs->armv4_5_mmu.armv4_5_cache);
 767 }
 768
 769 int arm926ejs_handle_virt2phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 770 {
 771         target_t *target = get_current_target(cmd_ctx);
 772         armv4_5_common_t *armv4_5;
 773         arm7_9_common_t *arm7_9;
 774         arm9tdmi_common_t *arm9tdmi;
 775         arm926ejs_common_t *arm926ejs;
 776         arm_jtag_t *jtag_info;
 777
 778         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 779         {
 780                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 781                 return ERROR_OK;
 782         }
 783
 784         jtag_info = &arm7_9->jtag_info;
 785
 786         if (target->state != TARGET_HALTED)
 787         {
 788                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 789                 return ERROR_OK;
 790         }
 791
 792         return armv4_5_mmu_handle_virt2phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 793 }
 794
 795 int arm926ejs_handle_md_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 796 {
 797         target_t *target = get_current_target(cmd_ctx);
 798         armv4_5_common_t *armv4_5;
 799         arm7_9_common_t *arm7_9;
 800         arm9tdmi_common_t *arm9tdmi;
 801         arm926ejs_common_t *arm926ejs;
 802         arm_jtag_t *jtag_info;
 803
 804         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 805         {
 806                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 807                 return ERROR_OK;
 808         }
 809
 810         jtag_info = &arm7_9->jtag_info;
 811
 812         if (target->state != TARGET_HALTED)
 813         {
 814                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 815                 return ERROR_OK;
 816         }
 817
 818         return armv4_5_mmu_handle_md_phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 819 }
 820
 821 int arm926ejs_handle_mw_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 822 {
 823         target_t *target = get_current_target(cmd_ctx);
 824         armv4_5_common_t *armv4_5;
 825         arm7_9_common_t *arm7_9;
 826         arm9tdmi_common_t *arm9tdmi;
 827         arm926ejs_common_t *arm926ejs;
 828         arm_jtag_t *jtag_info;
 829
 830         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 831         {
 832                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 833                 return ERROR_OK;
 834         }
 835
 836         jtag_info = &arm7_9->jtag_info;
 837
 838         if (target->state != TARGET_HALTED)
 839         {
 840                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 841                 return ERROR_OK;
 842         }
 843
 844         return armv4_5_mmu_handle_mw_phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 845 }