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   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
 102 int arm926ejs_catch_broken_irscan(u8 *captured, void *priv, scan_field_t *field)
 103 {
 104         /* The ARM926EJ-S' instruction register is 4 bits wide */
 105         u8 t = *captured & 0xf;
 106         u8 t2 = *field->in_check_value & 0xf;
 107         if (t == t2)
 108         {
 109                 return ERROR_OK;
 110         }
 111         else if ((t == 0x0f) || (t == 0x00))
 112         {
 113                 LOG_DEBUG("caught ARM926EJ-S invalid Capture-IR result after CP15 access");
 114                 return ERROR_OK;
 115         }
 116         return ERROR_JTAG_QUEUE_FAILED;;
 117 }
 118
 119 #define ARM926EJS_CP15_ADDR(opcode_1, opcode_2, CRn, CRm) ((opcode_1 << 11) | (opcode_2 << 8) | (CRn << 4) | (CRm << 0))
 120
 121 int arm926ejs_cp15_read(target_t *target, u32 op1, u32 op2, u32 CRn, u32 CRm, u32 *value)
 122 {
 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_RTI);
 135         arm_jtag_scann(jtag_info, 0xf);
 136         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 137
 138         fields[0].device = jtag_info->chain_pos;
 139         fields[0].num_bits = 32;
 140         fields[0].out_value = NULL;
 141         fields[0].out_mask = NULL;
 142         fields[0].in_value = NULL;
 143         fields[0].in_check_value = NULL;
 144         fields[0].in_check_mask = NULL;
 145         fields[0].in_handler = NULL;
 146         fields[0].in_handler_priv = NULL;
 147
 148         fields[1].device = jtag_info->chain_pos;
 149         fields[1].num_bits = 1;
 150         fields[1].out_value = &access;
 151         fields[1].out_mask = NULL;
 152         fields[1].in_value = &access;
 153         fields[1].in_check_value = NULL;
 154         fields[1].in_check_mask = NULL;
 155         fields[1].in_handler = NULL;
 156         fields[1].in_handler_priv = NULL;
 157
 158         fields[2].device = jtag_info->chain_pos;
 159         fields[2].num_bits = 14;
 160         fields[2].out_value = address_buf;
 161         fields[2].out_mask = NULL;
 162         fields[2].in_value = NULL;
 163         fields[2].in_check_value = NULL;
 164         fields[2].in_check_mask = NULL;
 165         fields[2].in_handler = NULL;
 166         fields[2].in_handler_priv = NULL;
 167
 168         fields[3].device = jtag_info->chain_pos;
 169         fields[3].num_bits = 1;
 170         fields[3].out_value = &nr_w_buf;
 171         fields[3].out_mask = NULL;
 172         fields[3].in_value = NULL;
 173         fields[3].in_check_value = NULL;
 174         fields[3].in_check_mask = NULL;
 175         fields[3].in_handler = NULL;
 176         fields[3].in_handler_priv = NULL;
 177
 178         jtag_add_dr_scan(4, fields, -1);
 179
 180         fields[0].in_handler_priv = value;
 181         fields[0].in_handler = arm_jtag_buf_to_u32;
 182
 183         /*TODO: add timeout*/
 184         do
 185         {
 186                 /* rescan with NOP, to wait for the access to complete */
 187                 access = 0;
 188                 nr_w_buf = 0;
 189                 jtag_add_dr_scan(4, fields, -1);
 190                 jtag_execute_queue();
 191         } while (buf_get_u32(&access, 0, 1) != 1);
 192
 193 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 194         LOG_DEBUG("addr: 0x%x value: %8.8x", address, *value);
 195 #endif
 196
 197         arm_jtag_set_instr(jtag_info, 0xc, &arm926ejs_catch_broken_irscan);
 198
 199         return ERROR_OK;
 200 }
 201
 202 int arm926ejs_cp15_write(target_t *target, u32 op1, u32 op2, u32 CRn, u32 CRm, u32 value)
 203 {
 204         armv4_5_common_t *armv4_5 = target->arch_info;
 205         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 206         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 207         u32 address = ARM926EJS_CP15_ADDR(op1, op2, CRn, CRm);
 208         scan_field_t fields[4];
 209         u8 value_buf[4];
 210         u8 address_buf[2];
 211         u8 nr_w_buf = 1;
 212         u8 access = 1;
 213
 214         buf_set_u32(address_buf, 0, 14, address);
 215         buf_set_u32(value_buf, 0, 32, value);
 216
 217         jtag_add_end_state(TAP_RTI);
 218         arm_jtag_scann(jtag_info, 0xf);
 219         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 220
 221         fields[0].device = jtag_info->chain_pos;
 222         fields[0].num_bits = 32;
 223         fields[0].out_value = value_buf;
 224         fields[0].out_mask = NULL;
 225         fields[0].in_value = NULL;
 226         fields[0].in_check_value = NULL;
 227         fields[0].in_check_mask = NULL;
 228         fields[0].in_handler = NULL;
 229         fields[0].in_handler_priv = NULL;
 230
 231         fields[1].device = jtag_info->chain_pos;
 232         fields[1].num_bits = 1;
 233         fields[1].out_value = &access;
 234         fields[1].out_mask = NULL;
 235         fields[1].in_value = &access;
 236         fields[1].in_check_value = NULL;
 237         fields[1].in_check_mask = NULL;
 238         fields[1].in_handler = NULL;
 239         fields[1].in_handler_priv = NULL;
 240
 241         fields[2].device = jtag_info->chain_pos;
 242         fields[2].num_bits = 14;
 243         fields[2].out_value = address_buf;
 244         fields[2].out_mask = NULL;
 245         fields[2].in_value = NULL;
 246         fields[2].in_check_value = NULL;
 247         fields[2].in_check_mask = NULL;
 248         fields[2].in_handler = NULL;
 249         fields[2].in_handler_priv = NULL;
 250
 251         fields[3].device = jtag_info->chain_pos;
 252         fields[3].num_bits = 1;
 253         fields[3].out_value = &nr_w_buf;
 254         fields[3].out_mask = NULL;
 255         fields[3].in_value = NULL;
 256         fields[3].in_check_value = NULL;
 257         fields[3].in_check_mask = NULL;
 258         fields[3].in_handler = NULL;
 259         fields[3].in_handler_priv = NULL;
 260
 261         jtag_add_dr_scan(4, fields, -1);
 262         /*TODO: add timeout*/
 263         do
 264         {
 265                 /* rescan with NOP, to wait for the access to complete */
 266                 access = 0;
 267                 nr_w_buf = 0;
 268                 jtag_add_dr_scan(4, fields, -1);
 269                 jtag_execute_queue();
 270         } while (buf_get_u32(&access, 0, 1) != 1);
 271
 272 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 273         LOG_DEBUG("addr: 0x%x value: %8.8x", address, value);
 274 #endif
 275
 276         arm_jtag_set_instr(jtag_info, 0xf, &arm926ejs_catch_broken_irscan);
 277
 278         return ERROR_OK;
 279 }
 280
 281 int arm926ejs_examine_debug_reason(target_t *target)
 282 {
 283         armv4_5_common_t *armv4_5 = target->arch_info;
 284         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 285         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 286         int debug_reason;
 287         int retval;
 288
 289         embeddedice_read_reg(dbg_stat);
 290         if ((retval = jtag_execute_queue()) != ERROR_OK)
 291                 return retval;
 292
 293         debug_reason = buf_get_u32(dbg_stat->value, 6, 4);
 294
 295         switch (debug_reason)
 296         {
 297                 case 1:
 298                         LOG_DEBUG("breakpoint from EICE unit 0");
 299                         target->debug_reason = DBG_REASON_BREAKPOINT;
 300                         break;
 301                 case 2:
 302                         LOG_DEBUG("breakpoint from EICE unit 1");
 303                         target->debug_reason = DBG_REASON_BREAKPOINT;
 304                         break;
 305                 case 3:
 306                         LOG_DEBUG("soft breakpoint (BKPT instruction)");
 307                         target->debug_reason = DBG_REASON_BREAKPOINT;
 308                         break;
 309                 case 4:
 310                         LOG_DEBUG("vector catch breakpoint");
 311                         target->debug_reason = DBG_REASON_BREAKPOINT;
 312                         break;
 313                 case 5:
 314                         LOG_DEBUG("external breakpoint");
 315                         target->debug_reason = DBG_REASON_BREAKPOINT;
 316                         break;
 317                 case 6:
 318                         LOG_DEBUG("watchpoint from EICE unit 0");
 319                         target->debug_reason = DBG_REASON_WATCHPOINT;
 320                         break;
 321                 case 7:
 322                         LOG_DEBUG("watchpoint from EICE unit 1");
 323                         target->debug_reason = DBG_REASON_WATCHPOINT;
 324                         break;
 325                 case 8:
 326                         LOG_DEBUG("external watchpoint");
 327                         target->debug_reason = DBG_REASON_WATCHPOINT;
 328                         break;
 329                 case 9:
 330                         LOG_DEBUG("internal debug request");
 331                         target->debug_reason = DBG_REASON_DBGRQ;
 332                         break;
 333                 case 10:
 334                         LOG_DEBUG("external debug request");
 335                         target->debug_reason = DBG_REASON_DBGRQ;
 336                         break;
 337                 case 11:
 338                         LOG_ERROR("BUG: debug re-entry from system speed access shouldn't be handled here");
 339                         break;
 340                 default:
 341                         LOG_ERROR("BUG: unknown debug reason: 0x%x", debug_reason);
 342                         target->debug_reason = DBG_REASON_DBGRQ;
 343                         retval = ERROR_TARGET_FAILURE;
 344                         break;
 345         }
 346
 347         return retval;
 348 }
 349
 350 u32 arm926ejs_get_ttb(target_t *target)
 351 {
 352         armv4_5_common_t *armv4_5 = target->arch_info;
 353         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 354         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 355         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 356         int retval;
 357         u32 ttb = 0x0;
 358
 359         if ((retval = arm926ejs->read_cp15(target, 0, 0, 2, 0, &ttb)) != ERROR_OK)
 360                 return retval;
 361
 362         return ttb;
 363 }
 364
 365 void arm926ejs_disable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 366 {
 367         armv4_5_common_t *armv4_5 = target->arch_info;
 368         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 369         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 370         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 371         u32 cp15_control;
 372
 373         /* read cp15 control register */
 374         arm926ejs->read_cp15(target, 0, 0, 1, 0, &cp15_control);
 375         jtag_execute_queue();
 376
 377         if (mmu)
 378         {
 379                 /* invalidate TLB */
 380                 arm926ejs->write_cp15(target, 0, 0, 8, 7, 0x0);
 381
 382                 cp15_control &= ~0x1U;
 383         }
 384
 385         if (d_u_cache)
 386         {
 387                 u32 debug_override;
 388                 /* read-modify-write CP15 debug override register
 389                  * to enable "test and clean all" */
 390                 arm926ejs->read_cp15(target, 0, 0, 15, 0, &debug_override);
 391                 debug_override |= 0x80000;
 392                 arm926ejs->write_cp15(target, 0, 0, 15, 0, debug_override);
 393
 394                 /* clean and invalidate DCache */
 395                 arm926ejs->write_cp15(target, 0, 0, 7, 5, 0x0);
 396
 397                 /* write CP15 debug override register
 398                  * to disable "test and clean all" */
 399                 debug_override &= ~0x80000;
 400                 arm926ejs->write_cp15(target, 0, 0, 15, 0, debug_override);
 401
 402                 cp15_control &= ~0x4U;
 403         }
 404
 405         if (i_cache)
 406         {
 407                 /* invalidate ICache */
 408                 arm926ejs->write_cp15(target, 0, 0, 7, 5, 0x0);
 409
 410                 cp15_control &= ~0x1000U;
 411         }
 412
 413         arm926ejs->write_cp15(target, 0, 0, 1, 0, cp15_control);
 414 }
 415
 416 void arm926ejs_enable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 417 {
 418         armv4_5_common_t *armv4_5 = target->arch_info;
 419         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 420         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 421         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 422         u32 cp15_control;
 423
 424         /* read cp15 control register */
 425         arm926ejs->read_cp15(target, 0, 0, 1, 0, &cp15_control);
 426         jtag_execute_queue();
 427
 428         if (mmu)
 429                 cp15_control |= 0x1U;
 430
 431         if (d_u_cache)
 432                 cp15_control |= 0x4U;
 433
 434         if (i_cache)
 435                 cp15_control |= 0x1000U;
 436
 437         arm926ejs->write_cp15(target, 0, 0, 1, 0, cp15_control);
 438 }
 439
 440 void arm926ejs_post_debug_entry(target_t *target)
 441 {
 442         armv4_5_common_t *armv4_5 = target->arch_info;
 443         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 444         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 445         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 446
 447         /* examine cp15 control reg */
 448         arm926ejs->read_cp15(target, 0, 0, 1, 0, &arm926ejs->cp15_control_reg);
 449         jtag_execute_queue();
 450         LOG_DEBUG("cp15_control_reg: %8.8x", arm926ejs->cp15_control_reg);
 451
 452         if (arm926ejs->armv4_5_mmu.armv4_5_cache.ctype == -1)
 453         {
 454                 u32 cache_type_reg;
 455                 /* identify caches */
 456                 arm926ejs->read_cp15(target, 0, 1, 0, 0, &cache_type_reg);
 457                 jtag_execute_queue();
 458                 armv4_5_identify_cache(cache_type_reg, &arm926ejs->armv4_5_mmu.armv4_5_cache);
 459         }
 460
 461         arm926ejs->armv4_5_mmu.mmu_enabled = (arm926ejs->cp15_control_reg & 0x1U) ? 1 : 0;
 462         arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (arm926ejs->cp15_control_reg & 0x4U) ? 1 : 0;
 463         arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (arm926ejs->cp15_control_reg & 0x1000U) ? 1 : 0;
 464
 465         /* save i/d fault status and address register */
 466         arm926ejs->read_cp15(target, 0, 0, 5, 0, &arm926ejs->d_fsr);
 467         arm926ejs->read_cp15(target, 0, 1, 5, 0, &arm926ejs->i_fsr);
 468         arm926ejs->read_cp15(target, 0, 0, 6, 0, &arm926ejs->d_far);
 469
 470         LOG_DEBUG("D FSR: 0x%8.8x, D FAR: 0x%8.8x, I FSR: 0x%8.8x",
 471                 arm926ejs->d_fsr, arm926ejs->d_far, arm926ejs->i_fsr);
 472
 473
 474         u32 cache_dbg_ctrl;
 475
 476         /* read-modify-write CP15 cache debug control register
 477          * to disable I/D-cache linefills and force WT */
 478         arm926ejs->read_cp15(target, 7, 0, 15, 0, &cache_dbg_ctrl);
 479         cache_dbg_ctrl |= 0x7;
 480         arm926ejs->write_cp15(target, 7, 0, 15, 0, cache_dbg_ctrl);
 481 }
 482
 483 void arm926ejs_pre_restore_context(target_t *target)
 484 {
 485         armv4_5_common_t *armv4_5 = target->arch_info;
 486         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 487         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 488         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 489
 490         /* restore i/d fault status and address register */
 491         arm926ejs->write_cp15(target, 0, 0, 5, 0, arm926ejs->d_fsr);
 492         arm926ejs->write_cp15(target, 0, 1, 5, 0, arm926ejs->i_fsr);
 493         arm926ejs->write_cp15(target, 0, 0, 6, 0, arm926ejs->d_far);
 494
 495         u32 cache_dbg_ctrl;
 496
 497         /* read-modify-write CP15 cache debug control register
 498          * to reenable I/D-cache linefills and disable WT */
 499         arm926ejs->read_cp15(target, 7, 0, 15, 0, &cache_dbg_ctrl);
 500         cache_dbg_ctrl &= ~0x7;
 501         arm926ejs->write_cp15(target, 7, 0, 15, 0, cache_dbg_ctrl);
 502 }
 503
 504 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)
 505 {
 506         armv4_5_common_t *armv4_5 = target->arch_info;
 507         arm7_9_common_t *arm7_9;
 508         arm9tdmi_common_t *arm9tdmi;
 509         arm926ejs_common_t *arm926ejs;
 510
 511         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 512         {
 513                 return -1;
 514         }
 515
 516         arm7_9 = armv4_5->arch_info;
 517         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 518         {
 519                 return -1;
 520         }
 521
 522         arm9tdmi = arm7_9->arch_info;
 523         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 524         {
 525                 return -1;
 526         }
 527
 528         arm926ejs = arm9tdmi->arch_info;
 529         if (arm926ejs->common_magic != ARM926EJS_COMMON_MAGIC)
 530         {
 531                 return -1;
 532         }
 533
 534         *armv4_5_p = armv4_5;
 535         *arm7_9_p = arm7_9;
 536         *arm9tdmi_p = arm9tdmi;
 537         *arm926ejs_p = arm926ejs;
 538
 539         return ERROR_OK;
 540 }
 541
 542 int arm926ejs_arch_state(struct target_s *target)
 543 {
 544         armv4_5_common_t *armv4_5 = target->arch_info;
 545         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 546         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 547         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 548
 549         char *state[] =
 550         {
 551                 "disabled", "enabled"
 552         };
 553
 554         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 555         {
 556                 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
 557                 exit(-1);
 558         }
 559
 560         LOG_USER(
 561                         "target halted in %s state due to %s, current mode: %s\n"
 562                         "cpsr: 0x%8.8x pc: 0x%8.8x\n"
 563                         "MMU: %s, D-Cache: %s, I-Cache: %s",
 564                          armv4_5_state_strings[armv4_5->core_state],
 565                          Jim_Nvp_value2name_simple( nvp_target_debug_reason,target->debug_reason)->name,
 566                          armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
 567                          buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 568                          buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
 569                          state[arm926ejs->armv4_5_mmu.mmu_enabled],
 570                          state[arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
 571                          state[arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
 572
 573         return ERROR_OK;
 574 }
 575
 576 int arm926ejs_soft_reset_halt(struct target_s *target)
 577 {
 578         armv4_5_common_t *armv4_5 = target->arch_info;
 579         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 580         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 581         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 582         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 583
 584         target_halt(target);
 585
 586         long long then=timeval_ms();
 587         int timeout;
 588         while (!(timeout=((timeval_ms()-then)>1000)))
 589         {
 590                 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1) == 0)
 591                 {
 592                         embeddedice_read_reg(dbg_stat);
 593                         jtag_execute_queue();
 594                 }  else
 595                 {
 596                         break;
 597                 }
 598                 if (debug_level>=1)
 599                 {
 600                         /* do not eat all CPU, time out after 1 se*/
 601                         alive_sleep(100);
 602                 } else
 603                 {
 604                         keep_alive();
 605                 }
 606         }
 607         if (timeout)
 608         {
 609                 LOG_ERROR("Failed to halt CPU after 1 sec");
 610                 return ERROR_TARGET_TIMEOUT;
 611         }
 612
 613         target->state = TARGET_HALTED;
 614
 615         /* SVC, ARM state, IRQ and FIQ disabled */
 616         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8, 0xd3);
 617         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 618         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 619
 620         /* start fetching from 0x0 */
 621         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, 0x0);
 622         armv4_5->core_cache->reg_list[15].dirty = 1;
 623         armv4_5->core_cache->reg_list[15].valid = 1;
 624
 625         armv4_5->core_mode = ARMV4_5_MODE_SVC;
 626         armv4_5->core_state = ARMV4_5_STATE_ARM;
 627
 628         arm926ejs_disable_mmu_caches(target, 1, 1, 1);
 629         arm926ejs->armv4_5_mmu.mmu_enabled = 0;
 630         arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
 631         arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
 632
 633         target_call_event_callbacks(target, TARGET_EVENT_HALTED);
 634
 635         return ERROR_OK;
 636 }
 637
 638 int arm926ejs_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
 639 {
 640         int retval;
 641         armv4_5_common_t *armv4_5 = target->arch_info;
 642         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 643         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 644         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 645
 646         if ((retval = arm7_9_write_memory(target, address, size, count, buffer)) != ERROR_OK)
 647                 return retval;
 648
 649         /* If ICache is enabled, we have to invalidate affected ICache lines
 650          * the DCache is forced to write-through, so we don't have to clean it here
 651          */
 652         if (arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
 653         {
 654                 if (count <= 1)
 655                 {
 656                         /* invalidate ICache single entry with MVA */
 657                         arm926ejs->write_cp15(target, 0, 1, 7, 5, address);
 658                 }
 659                 else
 660                 {
 661                         /* invalidate ICache */
 662                         arm926ejs->write_cp15(target, 0, 0, 7, 5, address);
 663                 }
 664         }
 665
 666         return retval;
 667 }
 668
 669 int arm926ejs_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 670 {
 671         arm9tdmi_init_target(cmd_ctx, target);
 672
 673         return ERROR_OK;
 674
 675 }
 676
 677 int arm926ejs_quit(void)
 678 {
 679
 680         return ERROR_OK;
 681 }
 682
 683 int arm926ejs_init_arch_info(target_t *target, arm926ejs_common_t *arm926ejs, int chain_pos, const char *variant)
 684 {
 685         arm9tdmi_common_t *arm9tdmi = &arm926ejs->arm9tdmi_common;
 686         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 687
 688         /* initialize arm9tdmi specific info (including arm7_9 and armv4_5)
 689          */
 690         arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
 691
 692         arm9tdmi->arch_info = arm926ejs;
 693         arm926ejs->common_magic = ARM926EJS_COMMON_MAGIC;
 694
 695         arm7_9->post_debug_entry = arm926ejs_post_debug_entry;
 696         arm7_9->pre_restore_context = arm926ejs_pre_restore_context;
 697
 698         arm926ejs->read_cp15 = arm926ejs_cp15_read;
 699         arm926ejs->write_cp15 = arm926ejs_cp15_write;
 700         arm926ejs->armv4_5_mmu.armv4_5_cache.ctype = -1;
 701         arm926ejs->armv4_5_mmu.get_ttb = arm926ejs_get_ttb;
 702         arm926ejs->armv4_5_mmu.read_memory = arm7_9_read_memory;
 703         arm926ejs->armv4_5_mmu.write_memory = arm7_9_write_memory;
 704         arm926ejs->armv4_5_mmu.disable_mmu_caches = arm926ejs_disable_mmu_caches;
 705         arm926ejs->armv4_5_mmu.enable_mmu_caches = arm926ejs_enable_mmu_caches;
 706         arm926ejs->armv4_5_mmu.has_tiny_pages = 1;
 707         arm926ejs->armv4_5_mmu.mmu_enabled = 0;
 708
 709         arm7_9->examine_debug_reason = arm926ejs_examine_debug_reason;
 710
 711         /* The ARM926EJ-S implements the ARMv5TE architecture which
 712          * has the BKPT instruction, so we don't have to use a watchpoint comparator
 713          */
 714         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
 715         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
 716
 717         return ERROR_OK;
 718 }
 719
 720 int arm926ejs_target_create(struct target_s *target, Jim_Interp *interp)
 721 {
 722         arm926ejs_common_t *arm926ejs = calloc(1,sizeof(arm926ejs_common_t));
 723
 724         arm926ejs_init_arch_info(target, arm926ejs, target->chain_position, target->variant);
 725
 726         return ERROR_OK;
 727 }
 728
 729 int arm926ejs_register_commands(struct command_context_s *cmd_ctx)
 730 {
 731         int retval;
 732         command_t *arm926ejs_cmd;
 733
 734
 735         retval = arm9tdmi_register_commands(cmd_ctx);
 736
 737         arm926ejs_cmd = register_command(cmd_ctx, NULL, "arm926ejs", NULL, COMMAND_ANY, "arm926ejs specific commands");
 738
 739         register_command(cmd_ctx, arm926ejs_cmd, "cp15", arm926ejs_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <opcode_1> <opcode_2> <CRn> <CRm> [value]");
 740
 741         register_command(cmd_ctx, arm926ejs_cmd, "cache_info", arm926ejs_handle_cache_info_command, COMMAND_EXEC, "display information about target caches");
 742         register_command(cmd_ctx, arm926ejs_cmd, "virt2phys", arm926ejs_handle_virt2phys_command, COMMAND_EXEC, "translate va to pa <va>");
 743
 744         register_command(cmd_ctx, arm926ejs_cmd, "mdw_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory words <physical addr> [count]");
 745         register_command(cmd_ctx, arm926ejs_cmd, "mdh_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory half-words <physical addr> [count]");
 746         register_command(cmd_ctx, arm926ejs_cmd, "mdb_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory bytes <physical addr> [count]");
 747
 748         register_command(cmd_ctx, arm926ejs_cmd, "mww_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory word <physical addr> <value>");
 749         register_command(cmd_ctx, arm926ejs_cmd, "mwh_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory half-word <physical addr> <value>");
 750         register_command(cmd_ctx, arm926ejs_cmd, "mwb_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory byte <physical addr> <value>");
 751
 752         return ERROR_OK;
 753 }
 754
 755 int arm926ejs_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 756 {
 757         int retval;
 758         target_t *target = get_current_target(cmd_ctx);
 759         armv4_5_common_t *armv4_5;
 760         arm7_9_common_t *arm7_9;
 761         arm9tdmi_common_t *arm9tdmi;
 762         arm926ejs_common_t *arm926ejs;
 763         int opcode_1;
 764         int opcode_2;
 765         int CRn;
 766         int CRm;
 767
 768         if ((argc < 4) || (argc > 5))
 769         {
 770                 command_print(cmd_ctx, "usage: arm926ejs cp15 <opcode_1> <opcode_2> <CRn> <CRm> [value]");
 771                 return ERROR_OK;
 772         }
 773
 774         opcode_1 = strtoul(args[0], NULL, 0);
 775         opcode_2 = strtoul(args[1], NULL, 0);
 776         CRn = strtoul(args[2], NULL, 0);
 777         CRm = strtoul(args[3], NULL, 0);
 778
 779         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 780         {
 781                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 782                 return ERROR_OK;
 783         }
 784
 785         if (target->state != TARGET_HALTED)
 786         {
 787                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 788                 return ERROR_OK;
 789         }
 790
 791         if (argc == 4)
 792         {
 793                 u32 value;
 794                 if ((retval = arm926ejs->read_cp15(target, opcode_1, opcode_2, CRn, CRm, &value)) != ERROR_OK)
 795                 {
 796                         command_print(cmd_ctx, "couldn't access register");
 797                         return ERROR_OK;
 798                 }
 799                 jtag_execute_queue();
 800
 801                 command_print(cmd_ctx, "%i %i %i %i: %8.8x", opcode_1, opcode_2, CRn, CRm, value);
 802         }
 803         else
 804         {
 805                 u32 value = strtoul(args[4], NULL, 0);
 806                 if ((retval = arm926ejs->write_cp15(target, opcode_1, opcode_2, CRn, CRm, value)) != ERROR_OK)
 807                 {
 808                         command_print(cmd_ctx, "couldn't access register");
 809                         return ERROR_OK;
 810                 }
 811                 command_print(cmd_ctx, "%i %i %i %i: %8.8x", opcode_1, opcode_2, CRn, CRm, value);
 812         }
 813
 814         return ERROR_OK;
 815 }
 816
 817 int arm926ejs_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 818 {
 819         target_t *target = get_current_target(cmd_ctx);
 820         armv4_5_common_t *armv4_5;
 821         arm7_9_common_t *arm7_9;
 822         arm9tdmi_common_t *arm9tdmi;
 823         arm926ejs_common_t *arm926ejs;
 824
 825         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 826         {
 827                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 828                 return ERROR_OK;
 829         }
 830
 831         return armv4_5_handle_cache_info_command(cmd_ctx, &arm926ejs->armv4_5_mmu.armv4_5_cache);
 832 }
 833
 834 int arm926ejs_handle_virt2phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 835 {
 836         target_t *target = get_current_target(cmd_ctx);
 837         armv4_5_common_t *armv4_5;
 838         arm7_9_common_t *arm7_9;
 839         arm9tdmi_common_t *arm9tdmi;
 840         arm926ejs_common_t *arm926ejs;
 841         arm_jtag_t *jtag_info;
 842
 843         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 844         {
 845                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 846                 return ERROR_OK;
 847         }
 848
 849         jtag_info = &arm7_9->jtag_info;
 850
 851         if (target->state != TARGET_HALTED)
 852         {
 853                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 854                 return ERROR_OK;
 855         }
 856
 857         return armv4_5_mmu_handle_virt2phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 858 }
 859
 860 int arm926ejs_handle_md_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 861 {
 862         target_t *target = get_current_target(cmd_ctx);
 863         armv4_5_common_t *armv4_5;
 864         arm7_9_common_t *arm7_9;
 865         arm9tdmi_common_t *arm9tdmi;
 866         arm926ejs_common_t *arm926ejs;
 867         arm_jtag_t *jtag_info;
 868
 869         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 870         {
 871                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 872                 return ERROR_OK;
 873         }
 874
 875         jtag_info = &arm7_9->jtag_info;
 876
 877         if (target->state != TARGET_HALTED)
 878         {
 879                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 880                 return ERROR_OK;
 881         }
 882
 883         return armv4_5_mmu_handle_md_phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 884 }
 885
 886 int arm926ejs_handle_mw_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 887 {
 888         target_t *target = get_current_target(cmd_ctx);
 889         armv4_5_common_t *armv4_5;
 890         arm7_9_common_t *arm7_9;
 891         arm9tdmi_common_t *arm9tdmi;
 892         arm926ejs_common_t *arm926ejs;
 893         arm_jtag_t *jtag_info;
 894
 895         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 896         {
 897                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 898                 return ERROR_OK;
 899         }
 900
 901         jtag_info = &arm7_9->jtag_info;
 902
 903         if (target->state != TARGET_HALTED)
 904         {
 905                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 906                 return ERROR_OK;
 907         }
 908
 909         return armv4_5_mmu_handle_mw_phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 910 }
 911 static int arm926ejs_virt2phys(struct target_s *target, u32 virtual, u32 *physical)
 912 {
 913         int retval;
 914         int type;
 915         u32 cb;
 916         int domain;
 917         u32 ap;
 918
 919         armv4_5_common_t *armv4_5;
 920         arm7_9_common_t *arm7_9;
 921         arm9tdmi_common_t *arm9tdmi;
 922         arm926ejs_common_t *arm926ejs;
 923         retval= arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs);
 924         if (retval != ERROR_OK)
 925         {
 926                 return retval;
 927         }
 928         u32 ret = armv4_5_mmu_translate_va(target, &arm926ejs->armv4_5_mmu, virtual, &type, &cb, &domain, &ap);
 929         if (type == -1)
 930         {
 931                 return ret;
 932         }
 933         *physical = ret;
 934         return ERROR_OK;
 935 }
 936
 937 static int arm926ejs_mmu(struct target_s *target, int *enabled)
 938 {
 939         armv4_5_common_t *armv4_5 = target->arch_info;
 940         arm926ejs_common_t *arm926ejs = armv4_5->arch_info;
 941
 942         if (target->state != TARGET_HALTED)
 943         {
 944                 LOG_ERROR("Target not halted");
 945                 return ERROR_TARGET_INVALID;
 946         }
 947         *enabled = arm926ejs->armv4_5_mmu.mmu_enabled;
 948         return ERROR_OK;
 949 }