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 1
  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);
  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 static int arm926ejs_virt2phys(struct target_s *target, u32 virtual, u32 *physical);
  57 static int arm926ejs_mmu(struct target_s *target, int *enabled);
  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         .target_request_data = arm7_9_target_request_data,
  67
  68         .halt = arm7_9_halt,
  69         .resume = arm7_9_resume,
  70         .step = arm7_9_step,
  71
  72         .assert_reset = arm7_9_assert_reset,
  73         .deassert_reset = arm7_9_deassert_reset,
  74         .soft_reset_halt = arm926ejs_soft_reset_halt,
  75
  76         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  77
  78         .read_memory = arm7_9_read_memory,
  79         .write_memory = arm926ejs_write_memory,
  80         .bulk_write_memory = arm7_9_bulk_write_memory,
  81         .checksum_memory = arm7_9_checksum_memory,
  82
  83         .run_algorithm = armv4_5_run_algorithm,
  84
  85         .add_breakpoint = arm7_9_add_breakpoint,
  86         .remove_breakpoint = arm7_9_remove_breakpoint,
  87         .add_watchpoint = arm7_9_add_watchpoint,
  88         .remove_watchpoint = arm7_9_remove_watchpoint,
  89
  90         .register_commands = arm926ejs_register_commands,
  91         .target_command = arm926ejs_target_command,
  92         .init_target = arm926ejs_init_target,
  93         .quit = arm926ejs_quit,
  94         .virt2phys = arm926ejs_virt2phys,
  95         .mmu = arm926ejs_mmu
  96 };
  97
  98
  99 int arm926ejs_catch_broken_irscan(u8 *captured, void *priv, scan_field_t *field)
 100 {
 101         /* The ARM926EJ-S' instruction register is 4 bits wide */
 102         u8 t = *captured & 0xf;
 103         u8 t2 = *field->in_check_value & 0xf;
 104         if (t == t2)
 105         {
 106                 return ERROR_OK;
 107         }
 108         else if ((t == 0x0f) || (t == 0x00))
 109         {
 110                 LOG_DEBUG("caught ARM926EJ-S invalid Capture-IR result after CP15 access");
 111                 return ERROR_OK;
 112         }
 113         return ERROR_JTAG_QUEUE_FAILED;;
 114 }
 115
 116 #define ARM926EJS_CP15_ADDR(opcode_1, opcode_2, CRn, CRm) ((opcode_1 << 11) | (opcode_2 << 8) | (CRn << 4) | (CRm << 0))
 117
 118 int arm926ejs_cp15_read(target_t *target, u32 op1, u32 op2, u32 CRn, u32 CRm, u32 *value)
 119 {
 120         armv4_5_common_t *armv4_5 = target->arch_info;
 121         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 122         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 123         u32 address = ARM926EJS_CP15_ADDR(op1, op2, CRn, CRm);
 124         scan_field_t fields[4];
 125         u8 address_buf[2];
 126         u8 nr_w_buf = 0;
 127         u8 access = 1;
 128
 129         buf_set_u32(address_buf, 0, 14, address);
 130
 131         jtag_add_end_state(TAP_RTI);
 132         arm_jtag_scann(jtag_info, 0xf);
 133         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 134
 135         fields[0].device = jtag_info->chain_pos;
 136         fields[0].num_bits = 32;
 137         fields[0].out_value = NULL;
 138         fields[0].out_mask = NULL;
 139         fields[0].in_value = NULL;
 140         fields[0].in_check_value = NULL;
 141         fields[0].in_check_mask = NULL;
 142         fields[0].in_handler = NULL;
 143         fields[0].in_handler_priv = NULL;
 144
 145         fields[1].device = jtag_info->chain_pos;
 146         fields[1].num_bits = 1;
 147         fields[1].out_value = &access;
 148         fields[1].out_mask = NULL;
 149         fields[1].in_value = &access;
 150         fields[1].in_check_value = NULL;
 151         fields[1].in_check_mask = NULL;
 152         fields[1].in_handler = NULL;
 153         fields[1].in_handler_priv = NULL;
 154
 155         fields[2].device = jtag_info->chain_pos;
 156         fields[2].num_bits = 14;
 157         fields[2].out_value = address_buf;
 158         fields[2].out_mask = NULL;
 159         fields[2].in_value = NULL;
 160         fields[2].in_check_value = NULL;
 161         fields[2].in_check_mask = NULL;
 162         fields[2].in_handler = NULL;
 163         fields[2].in_handler_priv = NULL;
 164
 165         fields[3].device = jtag_info->chain_pos;
 166         fields[3].num_bits = 1;
 167         fields[3].out_value = &nr_w_buf;
 168         fields[3].out_mask = NULL;
 169         fields[3].in_value = NULL;
 170         fields[3].in_check_value = NULL;
 171         fields[3].in_check_mask = NULL;
 172         fields[3].in_handler = NULL;
 173         fields[3].in_handler_priv = NULL;
 174
 175         jtag_add_dr_scan(4, fields, -1);
 176
 177         fields[0].in_handler_priv = value;
 178         fields[0].in_handler = arm_jtag_buf_to_u32;
 179
 180         /*TODO: add timeout*/
 181         do
 182         {
 183                 /* rescan with NOP, to wait for the access to complete */
 184                 access = 0;
 185                 nr_w_buf = 0;
 186                 jtag_add_dr_scan(4, fields, -1);
 187                 jtag_execute_queue();
 188         } while (buf_get_u32(&access, 0, 1) != 1);
 189
 190 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 191         LOG_DEBUG("addr: 0x%x value: %8.8x", address, *value);
 192 #endif
 193
 194         arm_jtag_set_instr(jtag_info, 0xc, &arm926ejs_catch_broken_irscan);
 195
 196         return ERROR_OK;
 197 }
 198
 199 int arm926ejs_cp15_write(target_t *target, u32 op1, u32 op2, u32 CRn, u32 CRm, u32 value)
 200 {
 201         armv4_5_common_t *armv4_5 = target->arch_info;
 202         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 203         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 204         u32 address = ARM926EJS_CP15_ADDR(op1, op2, CRn, CRm);
 205         scan_field_t fields[4];
 206         u8 value_buf[4];
 207         u8 address_buf[2];
 208         u8 nr_w_buf = 1;
 209         u8 access = 1;
 210
 211         buf_set_u32(address_buf, 0, 14, address);
 212         buf_set_u32(value_buf, 0, 32, value);
 213
 214         jtag_add_end_state(TAP_RTI);
 215         arm_jtag_scann(jtag_info, 0xf);
 216         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 217
 218         fields[0].device = jtag_info->chain_pos;
 219         fields[0].num_bits = 32;
 220         fields[0].out_value = value_buf;
 221         fields[0].out_mask = NULL;
 222         fields[0].in_value = NULL;
 223         fields[0].in_check_value = NULL;
 224         fields[0].in_check_mask = NULL;
 225         fields[0].in_handler = NULL;
 226         fields[0].in_handler_priv = NULL;
 227
 228         fields[1].device = jtag_info->chain_pos;
 229         fields[1].num_bits = 1;
 230         fields[1].out_value = &access;
 231         fields[1].out_mask = NULL;
 232         fields[1].in_value = &access;
 233         fields[1].in_check_value = NULL;
 234         fields[1].in_check_mask = NULL;
 235         fields[1].in_handler = NULL;
 236         fields[1].in_handler_priv = NULL;
 237
 238         fields[2].device = jtag_info->chain_pos;
 239         fields[2].num_bits = 14;
 240         fields[2].out_value = address_buf;
 241         fields[2].out_mask = NULL;
 242         fields[2].in_value = NULL;
 243         fields[2].in_check_value = NULL;
 244         fields[2].in_check_mask = NULL;
 245         fields[2].in_handler = NULL;
 246         fields[2].in_handler_priv = NULL;
 247
 248         fields[3].device = jtag_info->chain_pos;
 249         fields[3].num_bits = 1;
 250         fields[3].out_value = &nr_w_buf;
 251         fields[3].out_mask = NULL;
 252         fields[3].in_value = NULL;
 253         fields[3].in_check_value = NULL;
 254         fields[3].in_check_mask = NULL;
 255         fields[3].in_handler = NULL;
 256         fields[3].in_handler_priv = NULL;
 257
 258         jtag_add_dr_scan(4, fields, -1);
 259         /*TODO: add timeout*/
 260         do
 261         {
 262                 /* rescan with NOP, to wait for the access to complete */
 263                 access = 0;
 264                 nr_w_buf = 0;
 265                 jtag_add_dr_scan(4, fields, -1);
 266                 jtag_execute_queue();
 267         } while (buf_get_u32(&access, 0, 1) != 1);
 268
 269 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 270         LOG_DEBUG("addr: 0x%x value: %8.8x", address, value);
 271 #endif
 272
 273         arm_jtag_set_instr(jtag_info, 0xf, &arm926ejs_catch_broken_irscan);
 274
 275         return ERROR_OK;
 276 }
 277
 278 int arm926ejs_examine_debug_reason(target_t *target)
 279 {
 280         armv4_5_common_t *armv4_5 = target->arch_info;
 281         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 282         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 283         int debug_reason;
 284         int retval;
 285
 286         embeddedice_read_reg(dbg_stat);
 287         if ((retval = jtag_execute_queue()) != ERROR_OK)
 288                 return retval;
 289
 290         debug_reason = buf_get_u32(dbg_stat->value, 6, 4);
 291
 292         switch (debug_reason)
 293         {
 294                 case 1:
 295                         LOG_DEBUG("breakpoint from EICE unit 0");
 296                         target->debug_reason = DBG_REASON_BREAKPOINT;
 297                         break;
 298                 case 2:
 299                         LOG_DEBUG("breakpoint from EICE unit 1");
 300                         target->debug_reason = DBG_REASON_BREAKPOINT;
 301                         break;
 302                 case 3:
 303                         LOG_DEBUG("soft breakpoint (BKPT instruction)");
 304                         target->debug_reason = DBG_REASON_BREAKPOINT;
 305                         break;
 306                 case 4:
 307                         LOG_DEBUG("vector catch breakpoint");
 308                         target->debug_reason = DBG_REASON_BREAKPOINT;
 309                         break;
 310                 case 5:
 311                         LOG_DEBUG("external breakpoint");
 312                         target->debug_reason = DBG_REASON_BREAKPOINT;
 313                         break;
 314                 case 6:
 315                         LOG_DEBUG("watchpoint from EICE unit 0");
 316                         target->debug_reason = DBG_REASON_WATCHPOINT;
 317                         break;
 318                 case 7:
 319                         LOG_DEBUG("watchpoint from EICE unit 1");
 320                         target->debug_reason = DBG_REASON_WATCHPOINT;
 321                         break;
 322                 case 8:
 323                         LOG_DEBUG("external watchpoint");
 324                         target->debug_reason = DBG_REASON_WATCHPOINT;
 325                         break;
 326                 case 9:
 327                         LOG_DEBUG("internal debug request");
 328                         target->debug_reason = DBG_REASON_DBGRQ;
 329                         break;
 330                 case 10:
 331                         LOG_DEBUG("external debug request");
 332                         target->debug_reason = DBG_REASON_DBGRQ;
 333                         break;
 334                 case 11:
 335                         LOG_ERROR("BUG: debug re-entry from system speed access shouldn't be handled here");
 336                         break;
 337                 default:
 338                         LOG_ERROR("BUG: unknown debug reason: 0x%x", debug_reason);
 339                         target->debug_reason = DBG_REASON_DBGRQ;
 340                         retval = ERROR_TARGET_FAILURE;
 341                         break;
 342         }
 343
 344         return retval;
 345 }
 346
 347 u32 arm926ejs_get_ttb(target_t *target)
 348 {
 349         armv4_5_common_t *armv4_5 = target->arch_info;
 350         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 351         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 352         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 353         int retval;
 354         u32 ttb = 0x0;
 355
 356         if ((retval = arm926ejs->read_cp15(target, 0, 0, 2, 0, &ttb)) != ERROR_OK)
 357                 return retval;
 358
 359         return ttb;
 360 }
 361
 362 void arm926ejs_disable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 363 {
 364         armv4_5_common_t *armv4_5 = target->arch_info;
 365         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 366         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 367         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 368         u32 cp15_control;
 369
 370         /* read cp15 control register */
 371         arm926ejs->read_cp15(target, 0, 0, 1, 0, &cp15_control);
 372         jtag_execute_queue();
 373
 374         if (mmu)
 375         {
 376                 /* invalidate TLB */
 377                 arm926ejs->write_cp15(target, 0, 0, 8, 7, 0x0);
 378
 379                 cp15_control &= ~0x1U;
 380         }
 381
 382         if (d_u_cache)
 383         {
 384                 u32 debug_override;
 385                 /* read-modify-write CP15 debug override register
 386                  * to enable "test and clean all" */
 387                 arm926ejs->read_cp15(target, 0, 0, 15, 0, &debug_override);
 388                 debug_override |= 0x80000;
 389                 arm926ejs->write_cp15(target, 0, 0, 15, 0, debug_override);
 390
 391                 /* clean and invalidate DCache */
 392                 arm926ejs->write_cp15(target, 0, 0, 7, 5, 0x0);
 393
 394                 /* write CP15 debug override register
 395                  * to disable "test and clean all" */
 396                 debug_override &= ~0x80000;
 397                 arm926ejs->write_cp15(target, 0, 0, 15, 0, debug_override);
 398
 399                 cp15_control &= ~0x4U;
 400         }
 401
 402         if (i_cache)
 403         {
 404                 /* invalidate ICache */
 405                 arm926ejs->write_cp15(target, 0, 0, 7, 5, 0x0);
 406
 407                 cp15_control &= ~0x1000U;
 408         }
 409
 410         arm926ejs->write_cp15(target, 0, 0, 1, 0, cp15_control);
 411 }
 412
 413 void arm926ejs_enable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
 414 {
 415         armv4_5_common_t *armv4_5 = target->arch_info;
 416         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 417         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 418         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 419         u32 cp15_control;
 420
 421         /* read cp15 control register */
 422         arm926ejs->read_cp15(target, 0, 0, 1, 0, &cp15_control);
 423         jtag_execute_queue();
 424
 425         if (mmu)
 426                 cp15_control |= 0x1U;
 427
 428         if (d_u_cache)
 429                 cp15_control |= 0x4U;
 430
 431         if (i_cache)
 432                 cp15_control |= 0x1000U;
 433
 434         arm926ejs->write_cp15(target, 0, 0, 1, 0, cp15_control);
 435 }
 436
 437 void arm926ejs_post_debug_entry(target_t *target)
 438 {
 439         armv4_5_common_t *armv4_5 = target->arch_info;
 440         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 441         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 442         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 443
 444         /* examine cp15 control reg */
 445         arm926ejs->read_cp15(target, 0, 0, 1, 0, &arm926ejs->cp15_control_reg);
 446         jtag_execute_queue();
 447         LOG_DEBUG("cp15_control_reg: %8.8x", arm926ejs->cp15_control_reg);
 448
 449         if (arm926ejs->armv4_5_mmu.armv4_5_cache.ctype == -1)
 450         {
 451                 u32 cache_type_reg;
 452                 /* identify caches */
 453                 arm926ejs->read_cp15(target, 0, 1, 0, 0, &cache_type_reg);
 454                 jtag_execute_queue();
 455                 armv4_5_identify_cache(cache_type_reg, &arm926ejs->armv4_5_mmu.armv4_5_cache);
 456         }
 457
 458         arm926ejs->armv4_5_mmu.mmu_enabled = (arm926ejs->cp15_control_reg & 0x1U) ? 1 : 0;
 459         arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (arm926ejs->cp15_control_reg & 0x4U) ? 1 : 0;
 460         arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (arm926ejs->cp15_control_reg & 0x1000U) ? 1 : 0;
 461
 462         /* save i/d fault status and address register */
 463         arm926ejs->read_cp15(target, 0, 0, 5, 0, &arm926ejs->d_fsr);
 464         arm926ejs->read_cp15(target, 0, 1, 5, 0, &arm926ejs->i_fsr);
 465         arm926ejs->read_cp15(target, 0, 0, 6, 0, &arm926ejs->d_far);
 466
 467         LOG_DEBUG("D FSR: 0x%8.8x, D FAR: 0x%8.8x, I FSR: 0x%8.8x",
 468                 arm926ejs->d_fsr, arm926ejs->d_far, arm926ejs->i_fsr);
 469
 470
 471         u32 cache_dbg_ctrl;
 472
 473         /* read-modify-write CP15 cache debug control register
 474          * to disable I/D-cache linefills and force WT */
 475         arm926ejs->read_cp15(target, 7, 0, 15, 0, &cache_dbg_ctrl);
 476         cache_dbg_ctrl |= 0x7;
 477         arm926ejs->write_cp15(target, 7, 0, 15, 0, cache_dbg_ctrl);
 478 }
 479
 480 void arm926ejs_pre_restore_context(target_t *target)
 481 {
 482         armv4_5_common_t *armv4_5 = target->arch_info;
 483         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 484         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 485         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 486
 487         /* restore i/d fault status and address register */
 488         arm926ejs->write_cp15(target, 0, 0, 5, 0, arm926ejs->d_fsr);
 489         arm926ejs->write_cp15(target, 0, 1, 5, 0, arm926ejs->i_fsr);
 490         arm926ejs->write_cp15(target, 0, 0, 6, 0, arm926ejs->d_far);
 491
 492         u32 cache_dbg_ctrl;
 493
 494         /* read-modify-write CP15 cache debug control register
 495          * to reenable I/D-cache linefills and disable WT */
 496         arm926ejs->read_cp15(target, 7, 0, 15, 0, &cache_dbg_ctrl);
 497         cache_dbg_ctrl &= ~0x7;
 498         arm926ejs->write_cp15(target, 7, 0, 15, 0, cache_dbg_ctrl);
 499 }
 500
 501 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)
 502 {
 503         armv4_5_common_t *armv4_5 = target->arch_info;
 504         arm7_9_common_t *arm7_9;
 505         arm9tdmi_common_t *arm9tdmi;
 506         arm926ejs_common_t *arm926ejs;
 507
 508         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 509         {
 510                 return -1;
 511         }
 512
 513         arm7_9 = armv4_5->arch_info;
 514         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 515         {
 516                 return -1;
 517         }
 518
 519         arm9tdmi = arm7_9->arch_info;
 520         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 521         {
 522                 return -1;
 523         }
 524
 525         arm926ejs = arm9tdmi->arch_info;
 526         if (arm926ejs->common_magic != ARM926EJS_COMMON_MAGIC)
 527         {
 528                 return -1;
 529         }
 530
 531         *armv4_5_p = armv4_5;
 532         *arm7_9_p = arm7_9;
 533         *arm9tdmi_p = arm9tdmi;
 534         *arm926ejs_p = arm926ejs;
 535
 536         return ERROR_OK;
 537 }
 538
 539 int arm926ejs_arch_state(struct target_s *target)
 540 {
 541         armv4_5_common_t *armv4_5 = target->arch_info;
 542         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 543         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 544         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 545
 546         char *state[] =
 547         {
 548                 "disabled", "enabled"
 549         };
 550
 551         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 552         {
 553                 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
 554                 exit(-1);
 555         }
 556
 557         LOG_USER(
 558                         "target halted in %s state due to %s, current mode: %s\n"
 559                         "cpsr: 0x%8.8x pc: 0x%8.8x\n"
 560                         "MMU: %s, D-Cache: %s, I-Cache: %s",
 561                          armv4_5_state_strings[armv4_5->core_state],
 562                          target_debug_reason_strings[target->debug_reason],
 563                          armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
 564                          buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 565                          buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
 566                          state[arm926ejs->armv4_5_mmu.mmu_enabled],
 567                          state[arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
 568                          state[arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled]);
 569
 570         return ERROR_OK;
 571 }
 572
 573 int arm926ejs_soft_reset_halt(struct target_s *target)
 574 {
 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         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 580         int i;
 581
 582         target->type->halt(target);
 583
 584         for (i=0; i<10; i++)
 585         {
 586                 if (buf_get_u32(dbg_stat->value, EICE_DBG_STATUS_DBGACK, 1) == 0)
 587                 {
 588                         embeddedice_read_reg(dbg_stat);
 589                         jtag_execute_queue();
 590                 }  else
 591                 {
 592                         break;
 593                 }
 594                 /* do not eat all CPU, time out after 1 se*/
 595                 usleep(100*1000);
 596         }
 597         if (i==10)
 598         {
 599                 LOG_ERROR("Failed to halt CPU after 1 sec");
 600                 return ERROR_TARGET_TIMEOUT;
 601         }
 602
 603         target->state = TARGET_HALTED;
 604
 605         /* SVC, ARM state, IRQ and FIQ disabled */
 606         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8, 0xd3);
 607         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 608         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 609
 610         /* start fetching from 0x0 */
 611         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, 0x0);
 612         armv4_5->core_cache->reg_list[15].dirty = 1;
 613         armv4_5->core_cache->reg_list[15].valid = 1;
 614
 615         armv4_5->core_mode = ARMV4_5_MODE_SVC;
 616         armv4_5->core_state = ARMV4_5_STATE_ARM;
 617
 618         arm926ejs_disable_mmu_caches(target, 1, 1, 1);
 619         arm926ejs->armv4_5_mmu.mmu_enabled = 0;
 620         arm926ejs->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
 621         arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
 622
 623         target_call_event_callbacks(target, TARGET_EVENT_HALTED);
 624
 625         return ERROR_OK;
 626 }
 627
 628 int arm926ejs_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
 629 {
 630         int retval;
 631         armv4_5_common_t *armv4_5 = target->arch_info;
 632         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 633         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 634         arm926ejs_common_t *arm926ejs = arm9tdmi->arch_info;
 635
 636         if ((retval = arm7_9_write_memory(target, address, size, count, buffer)) != ERROR_OK)
 637                 return retval;
 638
 639         /* If ICache is enabled, we have to invalidate affected ICache lines
 640          * the DCache is forced to write-through, so we don't have to clean it here
 641          */
 642         if (arm926ejs->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
 643         {
 644                 if (count <= 1)
 645                 {
 646                         /* invalidate ICache single entry with MVA */
 647                         arm926ejs->write_cp15(target, 0, 1, 7, 5, address);
 648                 }
 649                 else
 650                 {
 651                         /* invalidate ICache */
 652                         arm926ejs->write_cp15(target, 0, 0, 7, 5, address);
 653                 }
 654         }
 655
 656         return retval;
 657 }
 658
 659 int arm926ejs_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 660 {
 661         arm9tdmi_init_target(cmd_ctx, target);
 662
 663         return ERROR_OK;
 664
 665 }
 666
 667 int arm926ejs_quit()
 668 {
 669
 670         return ERROR_OK;
 671 }
 672
 673 int arm926ejs_init_arch_info(target_t *target, arm926ejs_common_t *arm926ejs, int chain_pos, char *variant)
 674 {
 675         arm9tdmi_common_t *arm9tdmi = &arm926ejs->arm9tdmi_common;
 676         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 677
 678         /* initialize arm9tdmi specific info (including arm7_9 and armv4_5)
 679          */
 680         arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
 681
 682         arm9tdmi->arch_info = arm926ejs;
 683         arm926ejs->common_magic = ARM926EJS_COMMON_MAGIC;
 684
 685         arm7_9->post_debug_entry = arm926ejs_post_debug_entry;
 686         arm7_9->pre_restore_context = arm926ejs_pre_restore_context;
 687
 688         arm926ejs->read_cp15 = arm926ejs_cp15_read;
 689         arm926ejs->write_cp15 = arm926ejs_cp15_write;
 690         arm926ejs->armv4_5_mmu.armv4_5_cache.ctype = -1;
 691         arm926ejs->armv4_5_mmu.get_ttb = arm926ejs_get_ttb;
 692         arm926ejs->armv4_5_mmu.read_memory = arm7_9_read_memory;
 693         arm926ejs->armv4_5_mmu.write_memory = arm7_9_write_memory;
 694         arm926ejs->armv4_5_mmu.disable_mmu_caches = arm926ejs_disable_mmu_caches;
 695         arm926ejs->armv4_5_mmu.enable_mmu_caches = arm926ejs_enable_mmu_caches;
 696         arm926ejs->armv4_5_mmu.has_tiny_pages = 1;
 697         arm926ejs->armv4_5_mmu.mmu_enabled = 0;
 698
 699         arm7_9->examine_debug_reason = arm926ejs_examine_debug_reason;
 700
 701         /* The ARM926EJ-S implements the ARMv5TE architecture which
 702          * has the BKPT instruction, so we don't have to use a watchpoint comparator
 703          */
 704         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
 705         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
 706
 707         arm7_9->sw_bkpts_use_wp = 0;
 708         arm7_9->sw_bkpts_enabled = 1;
 709
 710         return ERROR_OK;
 711 }
 712
 713 int arm926ejs_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
 714 {
 715         int chain_pos;
 716         char *variant = NULL;
 717         arm926ejs_common_t *arm926ejs = malloc(sizeof(arm926ejs_common_t));
 718         memset(arm926ejs, 0, sizeof(*arm926ejs));
 719
 720         if (argc < 4)
 721         {
 722                 LOG_ERROR("'target arm926ejs' requires at least one additional argument");
 723                 exit(-1);
 724         }
 725
 726         chain_pos = strtoul(args[3], NULL, 0);
 727
 728         if (argc >= 5)
 729                 variant = args[4];
 730
 731         LOG_DEBUG("chain_pos: %i, variant: %s", chain_pos, variant);
 732
 733         arm926ejs_init_arch_info(target, arm926ejs, chain_pos, variant);
 734
 735         return ERROR_OK;
 736 }
 737
 738 int arm926ejs_register_commands(struct command_context_s *cmd_ctx)
 739 {
 740         int retval;
 741         command_t *arm926ejs_cmd;
 742
 743
 744         retval = arm9tdmi_register_commands(cmd_ctx);
 745
 746         arm926ejs_cmd = register_command(cmd_ctx, NULL, "arm926ejs", NULL, COMMAND_ANY, "arm926ejs specific commands");
 747
 748         register_command(cmd_ctx, arm926ejs_cmd, "cp15", arm926ejs_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <opcode_1> <opcode_2> <CRn> <CRm> [value]");
 749
 750         register_command(cmd_ctx, arm926ejs_cmd, "cache_info", arm926ejs_handle_cache_info_command, COMMAND_EXEC, "display information about target caches");
 751         register_command(cmd_ctx, arm926ejs_cmd, "virt2phys", arm926ejs_handle_virt2phys_command, COMMAND_EXEC, "translate va to pa <va>");
 752
 753         register_command(cmd_ctx, arm926ejs_cmd, "mdw_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory words <physical addr> [count]");
 754         register_command(cmd_ctx, arm926ejs_cmd, "mdh_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory half-words <physical addr> [count]");
 755         register_command(cmd_ctx, arm926ejs_cmd, "mdb_phys", arm926ejs_handle_md_phys_command, COMMAND_EXEC, "display memory bytes <physical addr> [count]");
 756
 757         register_command(cmd_ctx, arm926ejs_cmd, "mww_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory word <physical addr> <value>");
 758         register_command(cmd_ctx, arm926ejs_cmd, "mwh_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory half-word <physical addr> <value>");
 759         register_command(cmd_ctx, arm926ejs_cmd, "mwb_phys", arm926ejs_handle_mw_phys_command, COMMAND_EXEC, "write memory byte <physical addr> <value>");
 760
 761         return ERROR_OK;
 762 }
 763
 764 int arm926ejs_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 765 {
 766         int retval;
 767         target_t *target = get_current_target(cmd_ctx);
 768         armv4_5_common_t *armv4_5;
 769         arm7_9_common_t *arm7_9;
 770         arm9tdmi_common_t *arm9tdmi;
 771         arm926ejs_common_t *arm926ejs;
 772         int opcode_1;
 773         int opcode_2;
 774         int CRn;
 775         int CRm;
 776
 777         if ((argc < 4) || (argc > 5))
 778         {
 779                 command_print(cmd_ctx, "usage: arm926ejs cp15 <opcode_1> <opcode_2> <CRn> <CRm> [value]");
 780                 return ERROR_OK;
 781         }
 782
 783         opcode_1 = strtoul(args[0], NULL, 0);
 784         opcode_2 = strtoul(args[1], NULL, 0);
 785         CRn = strtoul(args[2], NULL, 0);
 786         CRm = strtoul(args[3], NULL, 0);
 787
 788         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 789         {
 790                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 791                 return ERROR_OK;
 792         }
 793
 794         if (target->state != TARGET_HALTED)
 795         {
 796                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 797                 return ERROR_OK;
 798         }
 799
 800         if (argc == 4)
 801         {
 802                 u32 value;
 803                 if ((retval = arm926ejs->read_cp15(target, opcode_1, opcode_2, CRn, CRm, &value)) != ERROR_OK)
 804                 {
 805                         command_print(cmd_ctx, "couldn't access register");
 806                         return ERROR_OK;
 807                 }
 808                 jtag_execute_queue();
 809
 810                 command_print(cmd_ctx, "%i %i %i %i: %8.8x", opcode_1, opcode_2, CRn, CRm, value);
 811         }
 812         else
 813         {
 814                 u32 value = strtoul(args[4], NULL, 0);
 815                 if ((retval = arm926ejs->write_cp15(target, opcode_1, opcode_2, CRn, CRm, value)) != ERROR_OK)
 816                 {
 817                         command_print(cmd_ctx, "couldn't access register");
 818                         return ERROR_OK;
 819                 }
 820                 command_print(cmd_ctx, "%i %i %i %i: %8.8x", opcode_1, opcode_2, CRn, CRm, value);
 821         }
 822
 823         return ERROR_OK;
 824 }
 825
 826 int arm926ejs_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 827 {
 828         target_t *target = get_current_target(cmd_ctx);
 829         armv4_5_common_t *armv4_5;
 830         arm7_9_common_t *arm7_9;
 831         arm9tdmi_common_t *arm9tdmi;
 832         arm926ejs_common_t *arm926ejs;
 833
 834         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 835         {
 836                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 837                 return ERROR_OK;
 838         }
 839
 840         return armv4_5_handle_cache_info_command(cmd_ctx, &arm926ejs->armv4_5_mmu.armv4_5_cache);
 841 }
 842
 843 int arm926ejs_handle_virt2phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 844 {
 845         target_t *target = get_current_target(cmd_ctx);
 846         armv4_5_common_t *armv4_5;
 847         arm7_9_common_t *arm7_9;
 848         arm9tdmi_common_t *arm9tdmi;
 849         arm926ejs_common_t *arm926ejs;
 850         arm_jtag_t *jtag_info;
 851
 852         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 853         {
 854                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 855                 return ERROR_OK;
 856         }
 857
 858         jtag_info = &arm7_9->jtag_info;
 859
 860         if (target->state != TARGET_HALTED)
 861         {
 862                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 863                 return ERROR_OK;
 864         }
 865
 866         return armv4_5_mmu_handle_virt2phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 867 }
 868
 869 int arm926ejs_handle_md_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 870 {
 871         target_t *target = get_current_target(cmd_ctx);
 872         armv4_5_common_t *armv4_5;
 873         arm7_9_common_t *arm7_9;
 874         arm9tdmi_common_t *arm9tdmi;
 875         arm926ejs_common_t *arm926ejs;
 876         arm_jtag_t *jtag_info;
 877
 878         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 879         {
 880                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 881                 return ERROR_OK;
 882         }
 883
 884         jtag_info = &arm7_9->jtag_info;
 885
 886         if (target->state != TARGET_HALTED)
 887         {
 888                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 889                 return ERROR_OK;
 890         }
 891
 892         return armv4_5_mmu_handle_md_phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 893 }
 894
 895 int arm926ejs_handle_mw_phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
 896 {
 897         target_t *target = get_current_target(cmd_ctx);
 898         armv4_5_common_t *armv4_5;
 899         arm7_9_common_t *arm7_9;
 900         arm9tdmi_common_t *arm9tdmi;
 901         arm926ejs_common_t *arm926ejs;
 902         arm_jtag_t *jtag_info;
 903
 904         if (arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs) != ERROR_OK)
 905         {
 906                 command_print(cmd_ctx, "current target isn't an ARM926EJ-S target");
 907                 return ERROR_OK;
 908         }
 909
 910         jtag_info = &arm7_9->jtag_info;
 911
 912         if (target->state != TARGET_HALTED)
 913         {
 914                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 915                 return ERROR_OK;
 916         }
 917
 918         return armv4_5_mmu_handle_mw_phys_command(cmd_ctx, cmd, args, argc, target, &arm926ejs->armv4_5_mmu);
 919 }
 920 static int arm926ejs_virt2phys(struct target_s *target, u32 virtual, u32 *physical)
 921 {
 922         int retval;
 923         int type;
 924         u32 cb;
 925         int domain;
 926         u32 ap;
 927
 928         armv4_5_common_t *armv4_5;
 929         arm7_9_common_t *arm7_9;
 930         arm9tdmi_common_t *arm9tdmi;
 931         arm926ejs_common_t *arm926ejs;
 932         retval= arm926ejs_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm926ejs);
 933         if (retval != ERROR_OK)
 934         {
 935                 return retval;
 936         }
 937         u32 ret = armv4_5_mmu_translate_va(target, &arm926ejs->armv4_5_mmu, virtual, &type, &cb, &domain, &ap);
 938         if (type == -1)
 939         {
 940                 return ret;
 941         }
 942         *physical = ret;
 943         return ERROR_OK;
 944 }
 945
 946 static int arm926ejs_mmu(struct target_s *target, int *enabled)
 947 {
 948         armv4_5_common_t *armv4_5 = target->arch_info;
 949         arm926ejs_common_t *arm926ejs = armv4_5->arch_info;
 950
 951         if (target->state != TARGET_HALTED)
 952         {
 953                 LOG_ERROR("Target not halted");
 954                 return ERROR_TARGET_INVALID;
 955         }
 956         *enabled = arm926ejs->armv4_5_mmu.mmu_enabled;
 957         return ERROR_OK;
 958 }