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