git.gag.com Git - fw/openocd/blob - src/target/xscale.c

   1 /***************************************************************************
   2  *   Copyright (C) 2006, 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 "replacements.h"
  25
  26 #include "xscale.h"
  27
  28 #include "register.h"
  29 #include "target.h"
  30 #include "armv4_5.h"
  31 #include "arm_simulator.h"
  32 #include "arm_disassembler.h"
  33 #include "log.h"
  34 #include "jtag.h"
  35 #include "binarybuffer.h"
  36 #include "time_support.h"
  37 #include "breakpoints.h"
  38 #include "fileio.h"
  39
  40 #include <stdlib.h>
  41 #include <string.h>
  42
  43 #include <sys/types.h>
  44 #include <unistd.h>
  45 #include <errno.h>
  46
  47
  48 /* cli handling */
  49 int xscale_register_commands(struct command_context_s *cmd_ctx);
  50
  51 /* forward declarations */
  52 int xscale_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
  53 int xscale_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  54 int xscale_quit();
  55
  56 int xscale_arch_state(struct target_s *target);
  57 int xscale_poll(target_t *target);
  58 int xscale_halt(target_t *target);
  59 int xscale_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution);
  60 int xscale_step(struct target_s *target, int current, u32 address, int handle_breakpoints);
  61 int xscale_debug_entry(target_t *target);
  62 int xscale_restore_context(target_t *target);
  63
  64 int xscale_assert_reset(target_t *target);
  65 int xscale_deassert_reset(target_t *target);
  66 int xscale_soft_reset_halt(struct target_s *target);
  67
  68 int xscale_set_reg_u32(reg_t *reg, u32 value);
  69
  70 int xscale_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode);
  71 int xscale_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, u32 value);
  72
  73 int xscale_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  74 int xscale_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  75 int xscale_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer);
  76 int xscale_checksum_memory(struct target_s *target, u32 address, u32 count, u32* checksum);
  77
  78 int xscale_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
  79 int xscale_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
  80 int xscale_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
  81 int xscale_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
  82 int xscale_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint);
  83 int xscale_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint);
  84 void xscale_enable_watchpoints(struct target_s *target);
  85 void xscale_enable_breakpoints(struct target_s *target);
  86 static int xscale_virt2phys(struct target_s *target, u32 virtual, u32 *physical);
  87 static int xscale_mmu(struct target_s *target, int *enabled);
  88
  89 int xscale_read_trace(target_t *target);
  90
  91 target_type_t xscale_target =
  92 {
  93         .name = "xscale",
  94
  95         .poll = xscale_poll,
  96         .arch_state = xscale_arch_state,
  97
  98         .target_request_data = NULL,
  99
 100         .halt = xscale_halt,
 101         .resume = xscale_resume,
 102         .step = xscale_step,
 103
 104         .assert_reset = xscale_assert_reset,
 105         .deassert_reset = xscale_deassert_reset,
 106         .soft_reset_halt = xscale_soft_reset_halt,
 107
 108         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
 109
 110         .read_memory = xscale_read_memory,
 111         .write_memory = xscale_write_memory,
 112         .bulk_write_memory = xscale_bulk_write_memory,
 113         .checksum_memory = xscale_checksum_memory,
 114         .blank_check_memory = NULL,
 115
 116         .run_algorithm = armv4_5_run_algorithm,
 117
 118         .add_breakpoint = xscale_add_breakpoint,
 119         .remove_breakpoint = xscale_remove_breakpoint,
 120         .add_watchpoint = xscale_add_watchpoint,
 121         .remove_watchpoint = xscale_remove_watchpoint,
 122
 123         .register_commands = xscale_register_commands,
 124         .target_command = xscale_target_command,
 125         .init_target = xscale_init_target,
 126         .quit = xscale_quit,
 127
 128         .virt2phys = xscale_virt2phys,
 129         .mmu = xscale_mmu
 130 };
 131
 132 char* xscale_reg_list[] =
 133 {
 134         "XSCALE_MAINID",                /* 0 */
 135         "XSCALE_CACHETYPE",
 136         "XSCALE_CTRL",
 137         "XSCALE_AUXCTRL",
 138         "XSCALE_TTB",
 139         "XSCALE_DAC",
 140         "XSCALE_FSR",
 141         "XSCALE_FAR",
 142         "XSCALE_PID",
 143         "XSCALE_CPACCESS",
 144         "XSCALE_IBCR0",                 /* 10 */
 145         "XSCALE_IBCR1",
 146         "XSCALE_DBR0",
 147         "XSCALE_DBR1",
 148         "XSCALE_DBCON",
 149         "XSCALE_TBREG",
 150         "XSCALE_CHKPT0",
 151         "XSCALE_CHKPT1",
 152         "XSCALE_DCSR",
 153         "XSCALE_TX",
 154         "XSCALE_RX",                    /* 20 */
 155         "XSCALE_TXRXCTRL",
 156 };
 157
 158 xscale_reg_t xscale_reg_arch_info[] =
 159 {
 160         {XSCALE_MAINID, NULL},
 161         {XSCALE_CACHETYPE, NULL},
 162         {XSCALE_CTRL, NULL},
 163         {XSCALE_AUXCTRL, NULL},
 164         {XSCALE_TTB, NULL},
 165         {XSCALE_DAC, NULL},
 166         {XSCALE_FSR, NULL},
 167         {XSCALE_FAR, NULL},
 168         {XSCALE_PID, NULL},
 169         {XSCALE_CPACCESS, NULL},
 170         {XSCALE_IBCR0, NULL},
 171         {XSCALE_IBCR1, NULL},
 172         {XSCALE_DBR0, NULL},
 173         {XSCALE_DBR1, NULL},
 174         {XSCALE_DBCON, NULL},
 175         {XSCALE_TBREG, NULL},
 176         {XSCALE_CHKPT0, NULL},
 177         {XSCALE_CHKPT1, NULL},
 178         {XSCALE_DCSR, NULL}, /* DCSR accessed via JTAG or SW */
 179         {-1, NULL}, /* TX accessed via JTAG */
 180         {-1, NULL}, /* RX accessed via JTAG */
 181         {-1, NULL}, /* TXRXCTRL implicit access via JTAG */
 182 };
 183
 184 int xscale_reg_arch_type = -1;
 185
 186 int xscale_get_reg(reg_t *reg);
 187 int xscale_set_reg(reg_t *reg, u8 *buf);
 188
 189 int xscale_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, xscale_common_t **xscale_p)
 190 {
 191         armv4_5_common_t *armv4_5 = target->arch_info;
 192         xscale_common_t *xscale = armv4_5->arch_info;
 193
 194         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 195         {
 196                 LOG_ERROR("target isn't an XScale target");
 197                 return -1;
 198         }
 199
 200         if (xscale->common_magic != XSCALE_COMMON_MAGIC)
 201         {
 202                 LOG_ERROR("target isn't an XScale target");
 203                 return -1;
 204         }
 205
 206         *armv4_5_p = armv4_5;
 207         *xscale_p = xscale;
 208
 209         return ERROR_OK;
 210 }
 211
 212 int xscale_jtag_set_instr(int chain_pos, u32 new_instr)
 213 {
 214         jtag_device_t *device = jtag_get_device(chain_pos);
 215
 216         if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr)
 217         {
 218                 scan_field_t field;
 219
 220                 field.device = chain_pos;
 221                 field.num_bits = device->ir_length;
 222                 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
 223                 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
 224                 field.out_mask = NULL;
 225                 field.in_value = NULL;
 226                 jtag_set_check_value(&field, device->expected, device->expected_mask, NULL);
 227
 228                 jtag_add_ir_scan(1, &field, -1);
 229
 230                 free(field.out_value);
 231         }
 232
 233         return ERROR_OK;
 234 }
 235
 236 int xscale_read_dcsr(target_t *target)
 237 {
 238         armv4_5_common_t *armv4_5 = target->arch_info;
 239         xscale_common_t *xscale = armv4_5->arch_info;
 240
 241         int retval;
 242
 243         scan_field_t fields[3];
 244         u8 field0 = 0x0;
 245         u8 field0_check_value = 0x2;
 246         u8 field0_check_mask = 0x7;
 247         u8 field2 = 0x0;
 248         u8 field2_check_value = 0x0;
 249         u8 field2_check_mask = 0x1;
 250
 251         jtag_add_end_state(TAP_PD);
 252         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr);
 253
 254         buf_set_u32(&field0, 1, 1, xscale->hold_rst);
 255         buf_set_u32(&field0, 2, 1, xscale->external_debug_break);
 256
 257         fields[0].device = xscale->jtag_info.chain_pos;
 258         fields[0].num_bits = 3;
 259         fields[0].out_value = &field0;
 260         fields[0].out_mask = NULL;
 261         fields[0].in_value = NULL;
 262         jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
 263
 264         fields[1].device = xscale->jtag_info.chain_pos;
 265         fields[1].num_bits = 32;
 266         fields[1].out_value = NULL;
 267         fields[1].out_mask = NULL;
 268         fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
 269         fields[1].in_handler = NULL;
 270         fields[1].in_handler_priv = NULL;
 271         fields[1].in_check_value = NULL;
 272         fields[1].in_check_mask = NULL;
 273
 274         fields[2].device = xscale->jtag_info.chain_pos;
 275         fields[2].num_bits = 1;
 276         fields[2].out_value = &field2;
 277         fields[2].out_mask = NULL;
 278         fields[2].in_value = NULL;
 279         jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
 280
 281         jtag_add_dr_scan(3, fields, -1);
 282
 283         if ((retval = jtag_execute_queue()) != ERROR_OK)
 284         {
 285                 LOG_ERROR("JTAG error while reading DCSR");
 286                 return retval;
 287         }
 288
 289         xscale->reg_cache->reg_list[XSCALE_DCSR].dirty = 0;
 290         xscale->reg_cache->reg_list[XSCALE_DCSR].valid = 1;
 291
 292         /* write the register with the value we just read
 293          * on this second pass, only the first bit of field0 is guaranteed to be 0)
 294          */
 295         field0_check_mask = 0x1;
 296         fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
 297         fields[1].in_value = NULL;
 298
 299         jtag_add_end_state(TAP_RTI);
 300
 301         jtag_add_dr_scan(3, fields, -1);
 302
 303         /* DANGER!!! this must be here. It will make sure that the arguments
 304          * to jtag_set_check_value() does not go out of scope! */
 305         return jtag_execute_queue();
 306 }
 307
 308 int xscale_receive(target_t *target, u32 *buffer, int num_words)
 309 {
 310         if (num_words==0)
 311                 return ERROR_INVALID_ARGUMENTS;
 312
 313         int retval=ERROR_OK;
 314         armv4_5_common_t *armv4_5 = target->arch_info;
 315         xscale_common_t *xscale = armv4_5->arch_info;
 316
 317         enum tap_state path[3];
 318         scan_field_t fields[3];
 319
 320         u8 *field0 = malloc(num_words * 1);
 321         u8 field0_check_value = 0x2;
 322         u8 field0_check_mask = 0x6;
 323         u32 *field1 = malloc(num_words * 4);
 324         u8 field2_check_value = 0x0;
 325         u8 field2_check_mask = 0x1;
 326         int words_done = 0;
 327         int words_scheduled = 0;
 328
 329         int i;
 330
 331         path[0] = TAP_SDS;
 332         path[1] = TAP_CD;
 333         path[2] = TAP_SD;
 334
 335         fields[0].device = xscale->jtag_info.chain_pos;
 336         fields[0].num_bits = 3;
 337         fields[0].out_value = NULL;
 338         fields[0].out_mask = NULL;
 339         fields[0].in_value = NULL;
 340         jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
 341
 342         fields[1].device = xscale->jtag_info.chain_pos;
 343         fields[1].num_bits = 32;
 344         fields[1].out_value = NULL;
 345         fields[1].out_mask = NULL;
 346         fields[1].in_value = NULL;
 347         fields[1].in_handler = NULL;
 348         fields[1].in_handler_priv = NULL;
 349         fields[1].in_check_value = NULL;
 350         fields[1].in_check_mask = NULL;
 351
 352
 353
 354         fields[2].device = xscale->jtag_info.chain_pos;
 355         fields[2].num_bits = 1;
 356         fields[2].out_value = NULL;
 357         fields[2].out_mask = NULL;
 358         fields[2].in_value = NULL;
 359         jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
 360
 361         jtag_add_end_state(TAP_RTI);
 362         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgtx);
 363         jtag_add_runtest(1, -1); /* ensures that we're in the TAP_RTI state as the above could be a no-op */
 364
 365         /* repeat until all words have been collected */
 366         int attempts=0;
 367         while (words_done < num_words)
 368         {
 369                 /* schedule reads */
 370                 words_scheduled = 0;
 371                 for (i = words_done; i < num_words; i++)
 372                 {
 373                         fields[0].in_value = &field0[i];
 374                         fields[1].in_handler = buf_to_u32_handler;
 375                         fields[1].in_handler_priv = (u8*)&field1[i];
 376
 377                         jtag_add_pathmove(3, path);
 378                         jtag_add_dr_scan(3, fields, TAP_RTI);
 379                         words_scheduled++;
 380                 }
 381
 382                 if ((retval = jtag_execute_queue()) != ERROR_OK)
 383                 {
 384                         LOG_ERROR("JTAG error while receiving data from debug handler");
 385                         break;
 386                 }
 387
 388                 /* examine results */
 389                 for (i = words_done; i < num_words; i++)
 390                 {
 391                         if (!(field0[0] & 1))
 392                         {
 393                                 /* move backwards if necessary */
 394                                 int j;
 395                                 for (j = i; j < num_words - 1; j++)
 396                                 {
 397                                         field0[j] = field0[j+1];
 398                                         field1[j] = field1[j+1];
 399                                 }
 400                                 words_scheduled--;
 401                         }
 402                 }
 403                 if (words_scheduled==0)
 404                 {
 405                         if (attempts++==1000)
 406                         {
 407                                 LOG_ERROR("Failed to receiving data from debug handler after 1000 attempts");
 408                                 retval=ERROR_TARGET_TIMEOUT;
 409                                 break;
 410                         }
 411                 }
 412
 413                 words_done += words_scheduled;
 414         }
 415
 416         for (i = 0; i < num_words; i++)
 417                 *(buffer++) = buf_get_u32((u8*)&field1[i], 0, 32);
 418
 419         free(field1);
 420
 421         return retval;
 422 }
 423
 424 int xscale_read_tx(target_t *target, int consume)
 425 {
 426         armv4_5_common_t *armv4_5 = target->arch_info;
 427         xscale_common_t *xscale = armv4_5->arch_info;
 428         enum tap_state path[3];
 429         enum tap_state noconsume_path[6];
 430
 431         int retval;
 432         struct timeval timeout, now;
 433
 434         scan_field_t fields[3];
 435         u8 field0_in = 0x0;
 436         u8 field0_check_value = 0x2;
 437         u8 field0_check_mask = 0x6;
 438         u8 field2_check_value = 0x0;
 439         u8 field2_check_mask = 0x1;
 440
 441         jtag_add_end_state(TAP_RTI);
 442
 443         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgtx);
 444
 445         path[0] = TAP_SDS;
 446         path[1] = TAP_CD;
 447         path[2] = TAP_SD;
 448
 449         noconsume_path[0] = TAP_SDS;
 450         noconsume_path[1] = TAP_CD;
 451         noconsume_path[2] = TAP_E1D;
 452         noconsume_path[3] = TAP_PD;
 453         noconsume_path[4] = TAP_E2D;
 454         noconsume_path[5] = TAP_SD;
 455
 456         fields[0].device = xscale->jtag_info.chain_pos;
 457         fields[0].num_bits = 3;
 458         fields[0].out_value = NULL;
 459         fields[0].out_mask = NULL;
 460         fields[0].in_value = &field0_in;
 461         jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
 462
 463         fields[1].device = xscale->jtag_info.chain_pos;
 464         fields[1].num_bits = 32;
 465         fields[1].out_value = NULL;
 466         fields[1].out_mask = NULL;
 467         fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_TX].value;
 468         fields[1].in_handler = NULL;
 469         fields[1].in_handler_priv = NULL;
 470         fields[1].in_check_value = NULL;
 471         fields[1].in_check_mask = NULL;
 472
 473
 474
 475         fields[2].device = xscale->jtag_info.chain_pos;
 476         fields[2].num_bits = 1;
 477         fields[2].out_value = NULL;
 478         fields[2].out_mask = NULL;
 479         fields[2].in_value = NULL;
 480         jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
 481
 482         gettimeofday(&timeout, NULL);
 483         timeval_add_time(&timeout, 1, 0);
 484
 485         for (;;)
 486         {
 487                 int i;
 488                 for (i=0; i<100; i++)
 489                 {
 490                         /* if we want to consume the register content (i.e. clear TX_READY),
 491                          * we have to go straight from Capture-DR to Shift-DR
 492                          * otherwise, we go from Capture-DR to Exit1-DR to Pause-DR
 493                         */
 494                         if (consume)
 495                                 jtag_add_pathmove(3, path);
 496                         else
 497                         {
 498                                 jtag_add_pathmove(sizeof(noconsume_path)/sizeof(*noconsume_path), noconsume_path);
 499                         }
 500
 501                         jtag_add_dr_scan(3, fields, TAP_RTI);
 502
 503                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 504                         {
 505                                 LOG_ERROR("JTAG error while reading TX");
 506                                 return ERROR_TARGET_TIMEOUT;
 507                         }
 508
 509                         gettimeofday(&now, NULL);
 510                         if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec)&& (now.tv_usec > timeout.tv_usec)))
 511                         {
 512                                 LOG_ERROR("time out reading TX register");
 513                                 return ERROR_TARGET_TIMEOUT;
 514                         }
 515                         if (!((!(field0_in & 1)) && consume))
 516                         {
 517                                 goto done;
 518                         }
 519                 }
 520                 LOG_DEBUG("waiting 10ms");
 521                 usleep(10*1000); /* avoid flooding the logs */
 522         }
 523         done:
 524
 525         if (!(field0_in & 1))
 526                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 527
 528         return ERROR_OK;
 529 }
 530
 531 int xscale_write_rx(target_t *target)
 532 {
 533         armv4_5_common_t *armv4_5 = target->arch_info;
 534         xscale_common_t *xscale = armv4_5->arch_info;
 535
 536         int retval;
 537         struct timeval timeout, now;
 538
 539         scan_field_t fields[3];
 540         u8 field0_out = 0x0;
 541         u8 field0_in = 0x0;
 542         u8 field0_check_value = 0x2;
 543         u8 field0_check_mask = 0x6;
 544         u8 field2 = 0x0;
 545         u8 field2_check_value = 0x0;
 546         u8 field2_check_mask = 0x1;
 547
 548         jtag_add_end_state(TAP_RTI);
 549
 550         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgrx);
 551
 552         fields[0].device = xscale->jtag_info.chain_pos;
 553         fields[0].num_bits = 3;
 554         fields[0].out_value = &field0_out;
 555         fields[0].out_mask = NULL;
 556         fields[0].in_value = &field0_in;
 557         jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
 558
 559         fields[1].device = xscale->jtag_info.chain_pos;
 560         fields[1].num_bits = 32;
 561         fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_RX].value;
 562         fields[1].out_mask = NULL;
 563         fields[1].in_value = NULL;
 564         fields[1].in_handler = NULL;
 565         fields[1].in_handler_priv = NULL;
 566         fields[1].in_check_value = NULL;
 567         fields[1].in_check_mask = NULL;
 568
 569
 570
 571         fields[2].device = xscale->jtag_info.chain_pos;
 572         fields[2].num_bits = 1;
 573         fields[2].out_value = &field2;
 574         fields[2].out_mask = NULL;
 575         fields[2].in_value = NULL;
 576         jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
 577
 578         gettimeofday(&timeout, NULL);
 579         timeval_add_time(&timeout, 1, 0);
 580
 581         /* poll until rx_read is low */
 582         LOG_DEBUG("polling RX");
 583         for (;;)
 584         {
 585                 int i;
 586                 for (i=0; i<10; i++)
 587                 {
 588                         jtag_add_dr_scan(3, fields, TAP_RTI);
 589
 590                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 591                         {
 592                                 LOG_ERROR("JTAG error while writing RX");
 593                                 return retval;
 594                         }
 595
 596                         gettimeofday(&now, NULL);
 597                         if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec)&& (now.tv_usec > timeout.tv_usec)))
 598                         {
 599                                 LOG_ERROR("time out writing RX register");
 600                                 return ERROR_TARGET_TIMEOUT;
 601                         }
 602                         if (!(field0_in & 1))
 603                                 goto done;
 604                 }
 605                 LOG_DEBUG("waiting 10ms");
 606                 usleep(10*1000); /* wait 10ms to avoid flooding the logs */
 607         }
 608         done:
 609
 610         /* set rx_valid */
 611         field2 = 0x1;
 612         jtag_add_dr_scan(3, fields, TAP_RTI);
 613
 614         if ((retval = jtag_execute_queue()) != ERROR_OK)
 615         {
 616                 LOG_ERROR("JTAG error while writing RX");
 617                 return retval;
 618         }
 619
 620         return ERROR_OK;
 621 }
 622
 623 /* send count elements of size byte to the debug handler */
 624 int xscale_send(target_t *target, u8 *buffer, int count, int size)
 625 {
 626         armv4_5_common_t *armv4_5 = target->arch_info;
 627         xscale_common_t *xscale = armv4_5->arch_info;
 628         u32 t[3];
 629         int bits[3];
 630
 631         int retval;
 632
 633         int done_count = 0;
 634
 635         jtag_add_end_state(TAP_RTI);
 636
 637         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgrx);
 638
 639         bits[0]=3;
 640         t[0]=0;
 641         bits[1]=32;
 642         t[2]=1;
 643         bits[2]=1;
 644         int endianness = target->endianness;
 645         while (done_count++ < count)
 646         {
 647                 switch (size)
 648                 {
 649                 case 4:
 650                         if (endianness == TARGET_LITTLE_ENDIAN)
 651                         {
 652                                 t[1]=le_to_h_u32(buffer);
 653                         } else
 654                         {
 655                                 t[1]=be_to_h_u32(buffer);
 656                         }
 657                         break;
 658                 case 2:
 659                         if (endianness == TARGET_LITTLE_ENDIAN)
 660                         {
 661                                 t[1]=le_to_h_u16(buffer);
 662                         } else
 663                         {
 664                                 t[1]=be_to_h_u16(buffer);
 665                         }
 666                         break;
 667                 case 1:
 668                         t[1]=buffer[0];
 669                         break;
 670                 default:
 671                         LOG_ERROR("BUG: size neither 4, 2 nor 1");
 672                         exit(-1);
 673                 }
 674                 jtag_add_dr_out(xscale->jtag_info.chain_pos,
 675                                 3,
 676                                 bits,
 677                                 t,
 678                                 TAP_RTI);
 679                 buffer += size;
 680         }
 681
 682         if ((retval = jtag_execute_queue()) != ERROR_OK)
 683         {
 684                 LOG_ERROR("JTAG error while sending data to debug handler");
 685                 return retval;
 686         }
 687
 688         return ERROR_OK;
 689 }
 690
 691 int xscale_send_u32(target_t *target, u32 value)
 692 {
 693         armv4_5_common_t *armv4_5 = target->arch_info;
 694         xscale_common_t *xscale = armv4_5->arch_info;
 695
 696         buf_set_u32(xscale->reg_cache->reg_list[XSCALE_RX].value, 0, 32, value);
 697         return xscale_write_rx(target);
 698 }
 699
 700 int xscale_write_dcsr(target_t *target, int hold_rst, int ext_dbg_brk)
 701 {
 702         armv4_5_common_t *armv4_5 = target->arch_info;
 703         xscale_common_t *xscale = armv4_5->arch_info;
 704
 705         int retval;
 706
 707         scan_field_t fields[3];
 708         u8 field0 = 0x0;
 709         u8 field0_check_value = 0x2;
 710         u8 field0_check_mask = 0x7;
 711         u8 field2 = 0x0;
 712         u8 field2_check_value = 0x0;
 713         u8 field2_check_mask = 0x1;
 714
 715         if (hold_rst != -1)
 716                 xscale->hold_rst = hold_rst;
 717
 718         if (ext_dbg_brk != -1)
 719                 xscale->external_debug_break = ext_dbg_brk;
 720
 721         jtag_add_end_state(TAP_RTI);
 722         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr);
 723
 724         buf_set_u32(&field0, 1, 1, xscale->hold_rst);
 725         buf_set_u32(&field0, 2, 1, xscale->external_debug_break);
 726
 727         fields[0].device = xscale->jtag_info.chain_pos;
 728         fields[0].num_bits = 3;
 729         fields[0].out_value = &field0;
 730         fields[0].out_mask = NULL;
 731         fields[0].in_value = NULL;
 732         jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
 733
 734         fields[1].device = xscale->jtag_info.chain_pos;
 735         fields[1].num_bits = 32;
 736         fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
 737         fields[1].out_mask = NULL;
 738         fields[1].in_value = NULL;
 739         fields[1].in_handler = NULL;
 740         fields[1].in_handler_priv = NULL;
 741         fields[1].in_check_value = NULL;
 742         fields[1].in_check_mask = NULL;
 743
 744
 745
 746         fields[2].device = xscale->jtag_info.chain_pos;
 747         fields[2].num_bits = 1;
 748         fields[2].out_value = &field2;
 749         fields[2].out_mask = NULL;
 750         fields[2].in_value = NULL;
 751         jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
 752
 753         jtag_add_dr_scan(3, fields, -1);
 754
 755         if ((retval = jtag_execute_queue()) != ERROR_OK)
 756         {
 757                 LOG_ERROR("JTAG error while writing DCSR");
 758                 return retval;
 759         }
 760
 761         xscale->reg_cache->reg_list[XSCALE_DCSR].dirty = 0;
 762         xscale->reg_cache->reg_list[XSCALE_DCSR].valid = 1;
 763
 764         return ERROR_OK;
 765 }
 766
 767 /* parity of the number of bits 0 if even; 1 if odd. for 32 bit words */
 768 unsigned int parity (unsigned int v)
 769 {
 770         unsigned int ov = v;
 771         v ^= v >> 16;
 772         v ^= v >> 8;
 773         v ^= v >> 4;
 774         v &= 0xf;
 775         LOG_DEBUG("parity of 0x%x is %i", ov, (0x6996 >> v) & 1);
 776         return (0x6996 >> v) & 1;
 777 }
 778
 779 int xscale_load_ic(target_t *target, int mini, u32 va, u32 buffer[8])
 780 {
 781         armv4_5_common_t *armv4_5 = target->arch_info;
 782         xscale_common_t *xscale = armv4_5->arch_info;
 783         u8 packet[4];
 784         u8 cmd;
 785         int word;
 786
 787         scan_field_t fields[2];
 788
 789         LOG_DEBUG("loading miniIC at 0x%8.8x", va);
 790
 791         jtag_add_end_state(TAP_RTI);
 792         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.ldic); /* LDIC */
 793
 794         /* CMD is b010 for Main IC and b011 for Mini IC */
 795         if (mini)
 796                 buf_set_u32(&cmd, 0, 3, 0x3);
 797         else
 798                 buf_set_u32(&cmd, 0, 3, 0x2);
 799
 800         buf_set_u32(&cmd, 3, 3, 0x0);
 801
 802         /* virtual address of desired cache line */
 803         buf_set_u32(packet, 0, 27, va >> 5);
 804
 805         fields[0].device = xscale->jtag_info.chain_pos;
 806         fields[0].num_bits = 6;
 807         fields[0].out_value = &cmd;
 808         fields[0].out_mask = NULL;
 809         fields[0].in_value = NULL;
 810         fields[0].in_check_value = NULL;
 811         fields[0].in_check_mask = NULL;
 812         fields[0].in_handler = NULL;
 813         fields[0].in_handler_priv = NULL;
 814
 815         fields[1].device = xscale->jtag_info.chain_pos;
 816         fields[1].num_bits = 27;
 817         fields[1].out_value = packet;
 818         fields[1].out_mask = NULL;
 819         fields[1].in_value = NULL;
 820         fields[1].in_check_value = NULL;
 821         fields[1].in_check_mask = NULL;
 822         fields[1].in_handler = NULL;
 823         fields[1].in_handler_priv = NULL;
 824
 825         jtag_add_dr_scan(2, fields, -1);
 826
 827         fields[0].num_bits = 32;
 828         fields[0].out_value = packet;
 829
 830         fields[1].num_bits = 1;
 831         fields[1].out_value = &cmd;
 832
 833         for (word = 0; word < 8; word++)
 834         {
 835                 buf_set_u32(packet, 0, 32, buffer[word]);
 836                 cmd = parity(*((u32*)packet));
 837                 jtag_add_dr_scan(2, fields, -1);
 838         }
 839
 840         jtag_execute_queue();
 841
 842         return ERROR_OK;
 843 }
 844
 845 int xscale_invalidate_ic_line(target_t *target, u32 va)
 846 {
 847         armv4_5_common_t *armv4_5 = target->arch_info;
 848         xscale_common_t *xscale = armv4_5->arch_info;
 849         u8 packet[4];
 850         u8 cmd;
 851
 852         scan_field_t fields[2];
 853
 854         jtag_add_end_state(TAP_RTI);
 855         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.ldic); /* LDIC */
 856
 857         /* CMD for invalidate IC line b000, bits [6:4] b000 */
 858         buf_set_u32(&cmd, 0, 6, 0x0);
 859
 860         /* virtual address of desired cache line */
 861         buf_set_u32(packet, 0, 27, va >> 5);
 862
 863         fields[0].device = xscale->jtag_info.chain_pos;
 864         fields[0].num_bits = 6;
 865         fields[0].out_value = &cmd;
 866         fields[0].out_mask = NULL;
 867         fields[0].in_value = NULL;
 868         fields[0].in_check_value = NULL;
 869         fields[0].in_check_mask = NULL;
 870         fields[0].in_handler = NULL;
 871         fields[0].in_handler_priv = NULL;
 872
 873         fields[1].device = xscale->jtag_info.chain_pos;
 874         fields[1].num_bits = 27;
 875         fields[1].out_value = packet;
 876         fields[1].out_mask = NULL;
 877         fields[1].in_value = NULL;
 878         fields[1].in_check_value = NULL;
 879         fields[1].in_check_mask = NULL;
 880         fields[1].in_handler = NULL;
 881         fields[1].in_handler_priv = NULL;
 882
 883         jtag_add_dr_scan(2, fields, -1);
 884
 885         return ERROR_OK;
 886 }
 887
 888 int xscale_update_vectors(target_t *target)
 889 {
 890         armv4_5_common_t *armv4_5 = target->arch_info;
 891         xscale_common_t *xscale = armv4_5->arch_info;
 892         int i;
 893         int retval;
 894
 895         u32 low_reset_branch, high_reset_branch;
 896
 897         for (i = 1; i < 8; i++)
 898         {
 899                 /* if there's a static vector specified for this exception, override */
 900                 if (xscale->static_high_vectors_set & (1 << i))
 901                 {
 902                         xscale->high_vectors[i] = xscale->static_high_vectors[i];
 903                 }
 904                 else
 905                 {
 906                         retval=target_read_u32(target, 0xffff0000 + 4*i, &xscale->high_vectors[i]);
 907                         if (retval == ERROR_TARGET_TIMEOUT)
 908                                 return retval;
 909                         if (retval!=ERROR_OK)
 910                         {
 911                                 /* Some of these reads will fail as part of normal execution */
 912                                 xscale->high_vectors[i] = ARMV4_5_B(0xfffffe, 0);
 913                         }
 914                 }
 915         }
 916
 917         for (i = 1; i < 8; i++)
 918         {
 919                 if (xscale->static_low_vectors_set & (1 << i))
 920                 {
 921                         xscale->low_vectors[i] = xscale->static_low_vectors[i];
 922                 }
 923                 else
 924                 {
 925                         retval=target_read_u32(target, 0x0 + 4*i, &xscale->low_vectors[i]);
 926                         if (retval == ERROR_TARGET_TIMEOUT)
 927                                 return retval;
 928                         if (retval!=ERROR_OK)
 929                         {
 930                                 /* Some of these reads will fail as part of normal execution */
 931                                 xscale->low_vectors[i] = ARMV4_5_B(0xfffffe, 0);
 932                         }
 933                 }
 934         }
 935
 936         /* calculate branches to debug handler */
 937         low_reset_branch = (xscale->handler_address + 0x20 - 0x0 - 0x8) >> 2;
 938         high_reset_branch = (xscale->handler_address + 0x20 - 0xffff0000 - 0x8) >> 2;
 939
 940         xscale->low_vectors[0] = ARMV4_5_B((low_reset_branch & 0xffffff), 0);
 941         xscale->high_vectors[0] = ARMV4_5_B((high_reset_branch & 0xffffff), 0);
 942
 943         /* invalidate and load exception vectors in mini i-cache */
 944         xscale_invalidate_ic_line(target, 0x0);
 945         xscale_invalidate_ic_line(target, 0xffff0000);
 946
 947         xscale_load_ic(target, 1, 0x0, xscale->low_vectors);
 948         xscale_load_ic(target, 1, 0xffff0000, xscale->high_vectors);
 949
 950         return ERROR_OK;
 951 }
 952
 953 int xscale_arch_state(struct target_s *target)
 954 {
 955         armv4_5_common_t *armv4_5 = target->arch_info;
 956         xscale_common_t *xscale = armv4_5->arch_info;
 957
 958         char *state[] =
 959         {
 960                 "disabled", "enabled"
 961         };
 962
 963         char *arch_dbg_reason[] =
 964         {
 965                 "", "\n(processor reset)", "\n(trace buffer full)"
 966         };
 967
 968         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 969         {
 970                 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
 971                 exit(-1);
 972         }
 973
 974         LOG_USER("target halted in %s state due to %s, current mode: %s\n"
 975                         "cpsr: 0x%8.8x pc: 0x%8.8x\n"
 976                         "MMU: %s, D-Cache: %s, I-Cache: %s"
 977                         "%s",
 978                          armv4_5_state_strings[armv4_5->core_state],
 979                          target_debug_reason_strings[target->debug_reason],
 980                          armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
 981                          buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 982                          buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
 983                          state[xscale->armv4_5_mmu.mmu_enabled],
 984                          state[xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
 985                          state[xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled],
 986                          arch_dbg_reason[xscale->arch_debug_reason]);
 987
 988         return ERROR_OK;
 989 }
 990
 991 int xscale_poll(target_t *target)
 992 {
 993         int retval=ERROR_OK;
 994         armv4_5_common_t *armv4_5 = target->arch_info;
 995         xscale_common_t *xscale = armv4_5->arch_info;
 996
 997         if ((target->state == TARGET_RUNNING) || (target->state == TARGET_DEBUG_RUNNING))
 998         {
 999                 enum target_state previous_state = target->state;
1000                 if ((retval = xscale_read_tx(target, 0)) == ERROR_OK)
1001                 {
1002
1003                         /* there's data to read from the tx register, we entered debug state */
1004                         xscale->handler_running = 1;
1005
1006                         target->state = TARGET_HALTED;
1007
1008                         /* process debug entry, fetching current mode regs */
1009                         retval = xscale_debug_entry(target);
1010                 }
1011                 else if (retval != ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
1012                 {
1013                         LOG_USER("error while polling TX register, reset CPU");
1014                         /* here we "lie" so GDB won't get stuck and a reset can be perfomed */
1015                         target->state = TARGET_HALTED;
1016                 }
1017
1018                 /* debug_entry could have overwritten target state (i.e. immediate resume)
1019                  * don't signal event handlers in that case
1020                  */
1021                 if (target->state != TARGET_HALTED)
1022                         return ERROR_OK;
1023
1024                 /* if target was running, signal that we halted
1025                  * otherwise we reentered from debug execution */
1026                 if (previous_state == TARGET_RUNNING)
1027                         target_call_event_callbacks(target, TARGET_EVENT_HALTED);
1028                 else
1029                         target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
1030         }
1031
1032         return retval;
1033 }
1034
1035 int xscale_debug_entry(target_t *target)
1036 {
1037         armv4_5_common_t *armv4_5 = target->arch_info;
1038         xscale_common_t *xscale = armv4_5->arch_info;
1039         u32 pc;
1040         u32 buffer[10];
1041         int i;
1042         int retval;
1043
1044         u32 moe;
1045
1046         /* clear external dbg break (will be written on next DCSR read) */
1047         xscale->external_debug_break = 0;
1048         if ((retval=xscale_read_dcsr(target))!=ERROR_OK)
1049                 return retval;
1050
1051         /* get r0, pc, r1 to r7 and cpsr */
1052         if ((retval=xscale_receive(target, buffer, 10))!=ERROR_OK)
1053                 return retval;
1054
1055         /* move r0 from buffer to register cache */
1056         buf_set_u32(armv4_5->core_cache->reg_list[0].value, 0, 32, buffer[0]);
1057         armv4_5->core_cache->reg_list[15].dirty = 1;
1058         armv4_5->core_cache->reg_list[15].valid = 1;
1059         LOG_DEBUG("r0: 0x%8.8x", buffer[0]);
1060
1061         /* move pc from buffer to register cache */
1062         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, buffer[1]);
1063         armv4_5->core_cache->reg_list[15].dirty = 1;
1064         armv4_5->core_cache->reg_list[15].valid = 1;
1065         LOG_DEBUG("pc: 0x%8.8x", buffer[1]);
1066
1067         /* move data from buffer to register cache */
1068         for (i = 1; i <= 7; i++)
1069         {
1070                 buf_set_u32(armv4_5->core_cache->reg_list[i].value, 0, 32, buffer[1 + i]);
1071                 armv4_5->core_cache->reg_list[i].dirty = 1;
1072                 armv4_5->core_cache->reg_list[i].valid = 1;
1073                 LOG_DEBUG("r%i: 0x%8.8x", i, buffer[i + 1]);
1074         }
1075
1076         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, buffer[9]);
1077         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
1078         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
1079         LOG_DEBUG("cpsr: 0x%8.8x", buffer[9]);
1080
1081         armv4_5->core_mode = buffer[9] & 0x1f;
1082         if (armv4_5_mode_to_number(armv4_5->core_mode) == -1)
1083         {
1084                 target->state = TARGET_UNKNOWN;
1085                 LOG_ERROR("cpsr contains invalid mode value - communication failure");
1086                 return ERROR_TARGET_FAILURE;
1087         }
1088         LOG_DEBUG("target entered debug state in %s mode", armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)]);
1089
1090         if (buffer[9] & 0x20)
1091                 armv4_5->core_state = ARMV4_5_STATE_THUMB;
1092         else
1093                 armv4_5->core_state = ARMV4_5_STATE_ARM;
1094
1095
1096         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
1097                 return ERROR_FAIL;
1098
1099         /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
1100         if ((armv4_5->core_mode != ARMV4_5_MODE_USR) && (armv4_5->core_mode != ARMV4_5_MODE_SYS))
1101         {
1102                 xscale_receive(target, buffer, 8);
1103                 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, buffer[7]);
1104                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).dirty = 0;
1105                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).valid = 1;
1106         }
1107         else
1108         {
1109                 /* r8 to r14, but no spsr */
1110                 xscale_receive(target, buffer, 7);
1111         }
1112
1113         /* move data from buffer to register cache */
1114         for (i = 8; i <= 14; i++)
1115         {
1116                 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).value, 0, 32, buffer[i - 8]);
1117                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = 0;
1118                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid = 1;
1119         }
1120
1121         /* examine debug reason */
1122         xscale_read_dcsr(target);
1123         moe = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 2, 3);
1124
1125         /* stored PC (for calculating fixup) */
1126         pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
1127
1128         switch (moe)
1129         {
1130                 case 0x0: /* Processor reset */
1131                         target->debug_reason = DBG_REASON_DBGRQ;
1132                         xscale->arch_debug_reason = XSCALE_DBG_REASON_RESET;
1133                         pc -= 4;
1134                         break;
1135                 case 0x1: /* Instruction breakpoint hit */
1136                         target->debug_reason = DBG_REASON_BREAKPOINT;
1137                         xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
1138                         pc -= 4;
1139                         break;
1140                 case 0x2: /* Data breakpoint hit */
1141                         target->debug_reason = DBG_REASON_WATCHPOINT;
1142                         xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
1143                         pc -= 4;
1144                         break;
1145                 case 0x3: /* BKPT instruction executed */
1146                         target->debug_reason = DBG_REASON_BREAKPOINT;
1147                         xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
1148                         pc -= 4;
1149                         break;
1150                 case 0x4: /* Ext. debug event */
1151                         target->debug_reason = DBG_REASON_DBGRQ;
1152                         xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
1153                         pc -= 4;
1154                         break;
1155                 case 0x5: /* Vector trap occured */
1156                         target->debug_reason = DBG_REASON_BREAKPOINT;
1157                         xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
1158                         pc -= 4;
1159                         break;
1160                 case 0x6: /* Trace buffer full break */
1161                         target->debug_reason = DBG_REASON_DBGRQ;
1162                         xscale->arch_debug_reason = XSCALE_DBG_REASON_TB_FULL;
1163                         pc -= 4;
1164                         break;
1165                 case 0x7: /* Reserved */
1166                 default:
1167                         LOG_ERROR("Method of Entry is 'Reserved'");
1168                         exit(-1);
1169                         break;
1170         }
1171
1172         /* apply PC fixup */
1173         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, pc);
1174
1175         /* on the first debug entry, identify cache type */
1176         if (xscale->armv4_5_mmu.armv4_5_cache.ctype == -1)
1177         {
1178                 u32 cache_type_reg;
1179
1180                 /* read cp15 cache type register */
1181                 xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CACHETYPE]);
1182                 cache_type_reg = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CACHETYPE].value, 0, 32);
1183
1184                 armv4_5_identify_cache(cache_type_reg, &xscale->armv4_5_mmu.armv4_5_cache);
1185         }
1186
1187         /* examine MMU and Cache settings */
1188         /* read cp15 control register */
1189         xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
1190         xscale->cp15_control_reg = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
1191         xscale->armv4_5_mmu.mmu_enabled = (xscale->cp15_control_reg & 0x1U) ? 1 : 0;
1192         xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (xscale->cp15_control_reg & 0x4U) ? 1 : 0;
1193         xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (xscale->cp15_control_reg & 0x1000U) ? 1 : 0;
1194
1195         /* tracing enabled, read collected trace data */
1196         if (xscale->trace.buffer_enabled)
1197         {
1198                 xscale_read_trace(target);
1199                 xscale->trace.buffer_fill--;
1200
1201                 /* resume if we're still collecting trace data */
1202                 if ((xscale->arch_debug_reason == XSCALE_DBG_REASON_TB_FULL)
1203                         && (xscale->trace.buffer_fill > 0))
1204                 {
1205                         xscale_resume(target, 1, 0x0, 1, 0);
1206                 }
1207                 else
1208                 {
1209                         xscale->trace.buffer_enabled = 0;
1210                 }
1211         }
1212
1213         return ERROR_OK;
1214 }
1215
1216 int xscale_halt(target_t *target)
1217 {
1218         armv4_5_common_t *armv4_5 = target->arch_info;
1219         xscale_common_t *xscale = armv4_5->arch_info;
1220
1221         LOG_DEBUG("target->state: %s", target_state_strings[target->state]);
1222
1223         if (target->state == TARGET_HALTED)
1224         {
1225                 LOG_DEBUG("target was already halted");
1226                 return ERROR_OK;
1227         }
1228         else if (target->state == TARGET_UNKNOWN)
1229         {
1230                 /* this must not happen for a xscale target */
1231                 LOG_ERROR("target was in unknown state when halt was requested");
1232                 return ERROR_TARGET_INVALID;
1233         }
1234         else if (target->state == TARGET_RESET)
1235         {
1236                 LOG_DEBUG("target->state == TARGET_RESET");
1237         }
1238         else
1239         {
1240                 /* assert external dbg break */
1241                 xscale->external_debug_break = 1;
1242                 xscale_read_dcsr(target);
1243
1244                 target->debug_reason = DBG_REASON_DBGRQ;
1245         }
1246
1247         return ERROR_OK;
1248 }
1249
1250 int xscale_enable_single_step(struct target_s *target, u32 next_pc)
1251 {
1252         armv4_5_common_t *armv4_5 = target->arch_info;
1253         xscale_common_t *xscale= armv4_5->arch_info;
1254         reg_t *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0];
1255
1256         if (xscale->ibcr0_used)
1257         {
1258                 breakpoint_t *ibcr0_bp = breakpoint_find(target, buf_get_u32(ibcr0->value, 0, 32) & 0xfffffffe);
1259
1260                 if (ibcr0_bp)
1261                 {
1262                         xscale_unset_breakpoint(target, ibcr0_bp);
1263                 }
1264                 else
1265                 {
1266                         LOG_ERROR("BUG: xscale->ibcr0_used is set, but no breakpoint with that address found");
1267                         exit(-1);
1268                 }
1269         }
1270
1271         xscale_set_reg_u32(ibcr0, next_pc | 0x1);
1272
1273         return ERROR_OK;
1274 }
1275
1276 int xscale_disable_single_step(struct target_s *target)
1277 {
1278         armv4_5_common_t *armv4_5 = target->arch_info;
1279         xscale_common_t *xscale= armv4_5->arch_info;
1280         reg_t *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0];
1281
1282         xscale_set_reg_u32(ibcr0, 0x0);
1283
1284         return ERROR_OK;
1285 }
1286
1287 int xscale_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution)
1288 {
1289         armv4_5_common_t *armv4_5 = target->arch_info;
1290         xscale_common_t *xscale= armv4_5->arch_info;
1291         breakpoint_t *breakpoint = target->breakpoints;
1292
1293         u32 current_pc;
1294
1295         int retval;
1296         int i;
1297
1298         LOG_DEBUG("-");
1299
1300         if (target->state != TARGET_HALTED)
1301         {
1302                 LOG_WARNING("target not halted");
1303                 return ERROR_TARGET_NOT_HALTED;
1304         }
1305
1306         if (!debug_execution)
1307         {
1308                 target_free_all_working_areas(target);
1309         }
1310
1311         /* update vector tables */
1312         if ((retval=xscale_update_vectors(target))!=ERROR_OK)
1313                 return retval;
1314
1315         /* current = 1: continue on current pc, otherwise continue at <address> */
1316         if (!current)
1317                 buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
1318
1319         current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
1320
1321         /* if we're at the reset vector, we have to simulate the branch */
1322         if (current_pc == 0x0)
1323         {
1324                 arm_simulate_step(target, NULL);
1325                 current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
1326         }
1327
1328         /* the front-end may request us not to handle breakpoints */
1329         if (handle_breakpoints)
1330         {
1331                 if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
1332                 {
1333                         u32 next_pc;
1334
1335                         /* there's a breakpoint at the current PC, we have to step over it */
1336                         LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address);
1337                         xscale_unset_breakpoint(target, breakpoint);
1338
1339                         /* calculate PC of next instruction */
1340                         if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK)
1341                         {
1342                                 u32 current_opcode;
1343                                 target_read_u32(target, current_pc, &current_opcode);
1344                                 LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8x", current_opcode);
1345                         }
1346
1347                         LOG_DEBUG("enable single-step");
1348                         xscale_enable_single_step(target, next_pc);
1349
1350                         /* restore banked registers */
1351                         xscale_restore_context(target);
1352
1353                         /* send resume request (command 0x30 or 0x31)
1354                          * clean the trace buffer if it is to be enabled (0x62) */
1355                         if (xscale->trace.buffer_enabled)
1356                         {
1357                                 xscale_send_u32(target, 0x62);
1358                                 xscale_send_u32(target, 0x31);
1359                         }
1360                         else
1361                                 xscale_send_u32(target, 0x30);
1362
1363                         /* send CPSR */
1364                         xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1365                         LOG_DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1366
1367                         for (i = 7; i >= 0; i--)
1368                         {
1369                                 /* send register */
1370                                 xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
1371                                 LOG_DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
1372                         }
1373
1374                         /* send PC */
1375                         xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1376                         LOG_DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1377
1378                         /* wait for and process debug entry */
1379                         xscale_debug_entry(target);
1380
1381                         LOG_DEBUG("disable single-step");
1382                         xscale_disable_single_step(target);
1383
1384                         LOG_DEBUG("set breakpoint at 0x%8.8x", breakpoint->address);
1385                         xscale_set_breakpoint(target, breakpoint);
1386                 }
1387         }
1388
1389         /* enable any pending breakpoints and watchpoints */
1390         xscale_enable_breakpoints(target);
1391         xscale_enable_watchpoints(target);
1392
1393         /* restore banked registers */
1394         xscale_restore_context(target);
1395
1396         /* send resume request (command 0x30 or 0x31)
1397          * clean the trace buffer if it is to be enabled (0x62) */
1398         if (xscale->trace.buffer_enabled)
1399         {
1400                 xscale_send_u32(target, 0x62);
1401                 xscale_send_u32(target, 0x31);
1402         }
1403         else
1404                 xscale_send_u32(target, 0x30);
1405
1406         /* send CPSR */
1407         xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1408         LOG_DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1409
1410         for (i = 7; i >= 0; i--)
1411         {
1412                 /* send register */
1413                 xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
1414                 LOG_DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
1415         }
1416
1417         /* send PC */
1418         xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1419         LOG_DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1420
1421         target->debug_reason = DBG_REASON_NOTHALTED;
1422
1423         if (!debug_execution)
1424         {
1425                 /* registers are now invalid */
1426                 armv4_5_invalidate_core_regs(target);
1427                 target->state = TARGET_RUNNING;
1428                 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1429         }
1430         else
1431         {
1432                 target->state = TARGET_DEBUG_RUNNING;
1433                 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
1434         }
1435
1436         LOG_DEBUG("target resumed");
1437
1438         xscale->handler_running = 1;
1439
1440         return ERROR_OK;
1441 }
1442
1443 int xscale_step(struct target_s *target, int current, u32 address, int handle_breakpoints)
1444 {
1445         armv4_5_common_t *armv4_5 = target->arch_info;
1446         xscale_common_t *xscale = armv4_5->arch_info;
1447         breakpoint_t *breakpoint = target->breakpoints;
1448
1449         u32 current_pc, next_pc;
1450         int i;
1451         int retval;
1452
1453         if (target->state != TARGET_HALTED)
1454         {
1455                 LOG_WARNING("target not halted");
1456                 return ERROR_TARGET_NOT_HALTED;
1457         }
1458
1459         /* current = 1: continue on current pc, otherwise continue at <address> */
1460         if (!current)
1461                 buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
1462
1463         current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
1464
1465         /* if we're at the reset vector, we have to simulate the step */
1466         if (current_pc == 0x0)
1467         {
1468                 arm_simulate_step(target, NULL);
1469                 current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
1470
1471                 target->debug_reason = DBG_REASON_SINGLESTEP;
1472                 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
1473
1474                 return ERROR_OK;
1475         }
1476
1477         /* the front-end may request us not to handle breakpoints */
1478         if (handle_breakpoints)
1479                 if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
1480                 {
1481                         xscale_unset_breakpoint(target, breakpoint);
1482                 }
1483
1484         target->debug_reason = DBG_REASON_SINGLESTEP;
1485
1486         /* calculate PC of next instruction */
1487         if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK)
1488         {
1489                 u32 current_opcode;
1490                 target_read_u32(target, current_pc, &current_opcode);
1491                 LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8x", current_opcode);
1492         }
1493
1494         LOG_DEBUG("enable single-step");
1495         xscale_enable_single_step(target, next_pc);
1496
1497         /* restore banked registers */
1498         xscale_restore_context(target);
1499
1500         /* send resume request (command 0x30 or 0x31)
1501          * clean the trace buffer if it is to be enabled (0x62) */
1502         if (xscale->trace.buffer_enabled)
1503         {
1504                 xscale_send_u32(target, 0x62);
1505                 xscale_send_u32(target, 0x31);
1506         }
1507         else
1508                 xscale_send_u32(target, 0x30);
1509
1510         /* send CPSR */
1511         xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1512         LOG_DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1513
1514         for (i = 7; i >= 0; i--)
1515         {
1516                 /* send register */
1517                 xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
1518                 LOG_DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
1519         }
1520
1521         /* send PC */
1522         xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1523         LOG_DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1524
1525         target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1526
1527         /* registers are now invalid */
1528         armv4_5_invalidate_core_regs(target);
1529
1530         /* wait for and process debug entry */
1531         xscale_debug_entry(target);
1532
1533         LOG_DEBUG("disable single-step");
1534         xscale_disable_single_step(target);
1535
1536         target_call_event_callbacks(target, TARGET_EVENT_HALTED);
1537
1538         if (breakpoint)
1539         {
1540                 xscale_set_breakpoint(target, breakpoint);
1541         }
1542
1543         LOG_DEBUG("target stepped");
1544
1545         return ERROR_OK;
1546
1547 }
1548
1549 int xscale_assert_reset(target_t *target)
1550 {
1551         armv4_5_common_t *armv4_5 = target->arch_info;
1552         xscale_common_t *xscale = armv4_5->arch_info;
1553
1554         LOG_DEBUG("target->state: %s", target_state_strings[target->state]);
1555
1556         /* select DCSR instruction (set endstate to R-T-I to ensure we don't
1557          * end up in T-L-R, which would reset JTAG
1558          */
1559         jtag_add_end_state(TAP_RTI);
1560         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr);
1561
1562         /* set Hold reset, Halt mode and Trap Reset */
1563         buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
1564         buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
1565         xscale_write_dcsr(target, 1, 0);
1566
1567         /* select BYPASS, because having DCSR selected caused problems on the PXA27x */
1568         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, 0x7f);
1569         jtag_execute_queue();
1570
1571         /* assert reset */
1572         jtag_add_reset(0, 1);
1573
1574         /* sleep 1ms, to be sure we fulfill any requirements */
1575         jtag_add_sleep(1000);
1576         jtag_execute_queue();
1577
1578         target->state = TARGET_RESET;
1579
1580         return ERROR_OK;
1581 }
1582
1583 int xscale_deassert_reset(target_t *target)
1584 {
1585         armv4_5_common_t *armv4_5 = target->arch_info;
1586         xscale_common_t *xscale = armv4_5->arch_info;
1587
1588         fileio_t debug_handler;
1589         u32 address;
1590         u32 binary_size;
1591
1592         u32 buf_cnt;
1593         int i;
1594         int retval;
1595
1596         breakpoint_t *breakpoint = target->breakpoints;
1597
1598         LOG_DEBUG("-");
1599
1600         xscale->ibcr_available = 2;
1601         xscale->ibcr0_used = 0;
1602         xscale->ibcr1_used = 0;
1603
1604         xscale->dbr_available = 2;
1605         xscale->dbr0_used = 0;
1606         xscale->dbr1_used = 0;
1607
1608         /* mark all hardware breakpoints as unset */
1609         while (breakpoint)
1610         {
1611                 if (breakpoint->type == BKPT_HARD)
1612                 {
1613                         breakpoint->set = 0;
1614                 }
1615                 breakpoint = breakpoint->next;
1616         }
1617
1618         if (!xscale->handler_installed)
1619         {
1620                 /* release SRST */
1621                 jtag_add_reset(0, 0);
1622
1623                 /* wait 300ms; 150 and 100ms were not enough */
1624                 jtag_add_sleep(300*1000);
1625
1626                 jtag_add_runtest(2030, TAP_RTI);
1627                 jtag_execute_queue();
1628
1629                 /* set Hold reset, Halt mode and Trap Reset */
1630                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
1631                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
1632                 xscale_write_dcsr(target, 1, 0);
1633
1634                 /* Load debug handler */
1635                 if (fileio_open(&debug_handler, "xscale/debug_handler.bin", FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
1636                 {
1637                         return ERROR_OK;
1638                 }
1639
1640                 if ((binary_size = debug_handler.size) % 4)
1641                 {
1642                         LOG_ERROR("debug_handler.bin: size not a multiple of 4");
1643                         exit(-1);
1644                 }
1645
1646                 if (binary_size > 0x800)
1647                 {
1648                         LOG_ERROR("debug_handler.bin: larger than 2kb");
1649                         exit(-1);
1650                 }
1651
1652                 binary_size = CEIL(binary_size, 32) * 32;
1653
1654                 address = xscale->handler_address;
1655                 while (binary_size > 0)
1656                 {
1657                         u32 cache_line[8];
1658                         u8 buffer[32];
1659
1660                         if ((retval = fileio_read(&debug_handler, 32, buffer, &buf_cnt)) != ERROR_OK)
1661                         {
1662
1663                         }
1664
1665                         for (i = 0; i < buf_cnt; i += 4)
1666                         {
1667                                 /* convert LE buffer to host-endian u32 */
1668                                 cache_line[i / 4] = le_to_h_u32(&buffer[i]);
1669                         }
1670
1671                         for (; buf_cnt < 32; buf_cnt += 4)
1672                         {
1673                                         cache_line[buf_cnt / 4] = 0xe1a08008;
1674                         }
1675
1676                         /* only load addresses other than the reset vectors */
1677                         if ((address % 0x400) != 0x0)
1678                         {
1679                                 xscale_load_ic(target, 1, address, cache_line);
1680                         }
1681
1682                         address += buf_cnt;
1683                         binary_size -= buf_cnt;
1684                 };
1685
1686                 xscale_load_ic(target, 1, 0x0, xscale->low_vectors);
1687                 xscale_load_ic(target, 1, 0xffff0000, xscale->high_vectors);
1688
1689                 jtag_add_runtest(30, TAP_RTI);
1690
1691                 jtag_add_sleep(100000);
1692
1693                 /* set Hold reset, Halt mode and Trap Reset */
1694                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
1695                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
1696                 xscale_write_dcsr(target, 1, 0);
1697
1698                 /* clear Hold reset to let the target run (should enter debug handler) */
1699                 xscale_write_dcsr(target, 0, 1);
1700                 target->state = TARGET_RUNNING;
1701
1702                 if ((target->reset_mode != RESET_HALT) && (target->reset_mode != RESET_INIT))
1703                 {
1704                         jtag_add_sleep(10000);
1705
1706                         /* we should have entered debug now */
1707                         xscale_debug_entry(target);
1708                         target->state = TARGET_HALTED;
1709
1710                         /* resume the target */
1711                         xscale_resume(target, 1, 0x0, 1, 0);
1712                 }
1713
1714                 fileio_close(&debug_handler);
1715         }
1716         else
1717         {
1718                 jtag_add_reset(0, 0);
1719         }
1720
1721
1722         return ERROR_OK;
1723 }
1724
1725 int xscale_soft_reset_halt(struct target_s *target)
1726 {
1727
1728         return ERROR_OK;
1729 }
1730
1731 int xscale_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode)
1732 {
1733
1734         return ERROR_OK;
1735 }
1736
1737 int xscale_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, u32 value)
1738 {
1739
1740         return ERROR_OK;
1741 }
1742
1743 int xscale_full_context(target_t *target)
1744 {
1745         armv4_5_common_t *armv4_5 = target->arch_info;
1746
1747         u32 *buffer;
1748
1749         int i, j;
1750
1751         LOG_DEBUG("-");
1752
1753         if (target->state != TARGET_HALTED)
1754         {
1755                 LOG_WARNING("target not halted");
1756                 return ERROR_TARGET_NOT_HALTED;
1757         }
1758
1759         buffer = malloc(4 * 8);
1760
1761         /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1762          * we can't enter User mode on an XScale (unpredictable),
1763          * but User shares registers with SYS
1764          */
1765         for(i = 1; i < 7; i++)
1766         {
1767                 int valid = 1;
1768
1769                 /* check if there are invalid registers in the current mode
1770                  */
1771                 for (j = 0; j <= 16; j++)
1772                 {
1773                         if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid == 0)
1774                                 valid = 0;
1775                 }
1776
1777                 if (!valid)
1778                 {
1779                         u32 tmp_cpsr;
1780
1781                         /* request banked registers */
1782                         xscale_send_u32(target, 0x0);
1783
1784                         tmp_cpsr = 0x0;
1785                         tmp_cpsr |= armv4_5_number_to_mode(i);
1786                         tmp_cpsr |= 0xc0; /* I/F bits */
1787
1788                         /* send CPSR for desired mode */
1789                         xscale_send_u32(target, tmp_cpsr);
1790
1791                         /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
1792                         if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS))
1793                         {
1794                                 xscale_receive(target, buffer, 8);
1795                                 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, buffer[7]);
1796                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0;
1797                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).valid = 1;
1798                         }
1799                         else
1800                         {
1801                                 xscale_receive(target, buffer, 7);
1802                         }
1803
1804                         /* move data from buffer to register cache */
1805                         for (j = 8; j <= 14; j++)
1806                         {
1807                                 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).value, 0, 32, buffer[j - 8]);
1808                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0;
1809                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid = 1;
1810                         }
1811                 }
1812         }
1813
1814         free(buffer);
1815
1816         return ERROR_OK;
1817 }
1818
1819 int xscale_restore_context(target_t *target)
1820 {
1821         armv4_5_common_t *armv4_5 = target->arch_info;
1822
1823         int i, j;
1824
1825         LOG_DEBUG("-");
1826
1827         if (target->state != TARGET_HALTED)
1828         {
1829                 LOG_WARNING("target not halted");
1830                 return ERROR_TARGET_NOT_HALTED;
1831         }
1832
1833         /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1834         * we can't enter User mode on an XScale (unpredictable),
1835         * but User shares registers with SYS
1836         */
1837         for(i = 1; i < 7; i++)
1838         {
1839                 int dirty = 0;
1840
1841                 /* check if there are invalid registers in the current mode
1842                 */
1843                 for (j = 8; j <= 14; j++)
1844                 {
1845                         if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty == 1)
1846                                 dirty = 1;
1847                 }
1848
1849                 /* if not USR/SYS, check if the SPSR needs to be written */
1850                 if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS))
1851                 {
1852                         if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty == 1)
1853                                 dirty = 1;
1854                 }
1855
1856                 if (dirty)
1857                 {
1858                         u32 tmp_cpsr;
1859
1860                         /* send banked registers */
1861                         xscale_send_u32(target, 0x1);
1862
1863                         tmp_cpsr = 0x0;
1864                         tmp_cpsr |= armv4_5_number_to_mode(i);
1865                         tmp_cpsr |= 0xc0; /* I/F bits */
1866
1867                         /* send CPSR for desired mode */
1868                         xscale_send_u32(target, tmp_cpsr);
1869
1870                         /* send banked registers, r8 to r14, and spsr if not in USR/SYS mode */
1871                         for (j = 8; j <= 14; j++)
1872                         {
1873                                 xscale_send_u32(target, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, j).value, 0, 32));
1874                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0;
1875                         }
1876
1877                         if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS))
1878                         {
1879                                 xscale_send_u32(target, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32));
1880                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0;
1881                         }
1882                 }
1883         }
1884
1885         return ERROR_OK;
1886 }
1887
1888 int xscale_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
1889 {
1890         armv4_5_common_t *armv4_5 = target->arch_info;
1891         xscale_common_t *xscale = armv4_5->arch_info;
1892         u32 *buf32;
1893         int i;
1894         int retval;
1895
1896         LOG_DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
1897
1898         if (target->state != TARGET_HALTED)
1899         {
1900                 LOG_WARNING("target not halted");
1901                 return ERROR_TARGET_NOT_HALTED;
1902         }
1903
1904         /* sanitize arguments */
1905         if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
1906                 return ERROR_INVALID_ARGUMENTS;
1907
1908         if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
1909                 return ERROR_TARGET_UNALIGNED_ACCESS;
1910
1911         /* send memory read request (command 0x1n, n: access size) */
1912         if ((retval=xscale_send_u32(target, 0x10 | size))!=ERROR_OK)
1913                 return retval;
1914
1915         /* send base address for read request */
1916         if ((retval=xscale_send_u32(target, address))!=ERROR_OK)
1917                 return retval;
1918
1919         /* send number of requested data words */
1920         if ((retval=xscale_send_u32(target, count))!=ERROR_OK)
1921                 return retval;
1922
1923         /* receive data from target (count times 32-bit words in host endianness) */
1924         buf32 = malloc(4 * count);
1925         if ((retval=xscale_receive(target, buf32, count))!=ERROR_OK)
1926                 return retval;
1927
1928         /* extract data from host-endian buffer into byte stream */
1929         for (i = 0; i < count; i++)
1930         {
1931                 switch (size)
1932                 {
1933                         case 4:
1934                                 target_buffer_set_u32(target, buffer, buf32[i]);
1935                                 buffer += 4;
1936                                 break;
1937                         case 2:
1938                                 target_buffer_set_u16(target, buffer, buf32[i] & 0xffff);
1939                                 buffer += 2;
1940                                 break;
1941                         case 1:
1942                                 *buffer++ = buf32[i] & 0xff;
1943                                 break;
1944                         default:
1945                                 LOG_ERROR("should never get here");
1946                                 exit(-1);
1947                 }
1948         }
1949
1950         free(buf32);
1951
1952         /* examine DCSR, to see if Sticky Abort (SA) got set */
1953         if ((retval=xscale_read_dcsr(target))!=ERROR_OK)
1954                 return retval;
1955         if (buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 5, 1) == 1)
1956         {
1957                 /* clear SA bit */
1958                 if ((retval=xscale_send_u32(target, 0x60))!=ERROR_OK)
1959                         return retval;
1960
1961                 return ERROR_TARGET_DATA_ABORT;
1962         }
1963
1964         return ERROR_OK;
1965 }
1966
1967 int xscale_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
1968 {
1969         armv4_5_common_t *armv4_5 = target->arch_info;
1970         xscale_common_t *xscale = armv4_5->arch_info;
1971         int retval;
1972
1973         LOG_DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
1974
1975         if (target->state != TARGET_HALTED)
1976         {
1977                 LOG_WARNING("target not halted");
1978                 return ERROR_TARGET_NOT_HALTED;
1979         }
1980
1981         /* sanitize arguments */
1982         if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
1983                 return ERROR_INVALID_ARGUMENTS;
1984
1985         if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
1986                 return ERROR_TARGET_UNALIGNED_ACCESS;
1987
1988         /* send memory write request (command 0x2n, n: access size) */
1989         if ((retval=xscale_send_u32(target, 0x20 | size))!=ERROR_OK)
1990                 return retval;
1991
1992         /* send base address for read request */
1993         if ((retval=xscale_send_u32(target, address))!=ERROR_OK)
1994                 return retval;
1995
1996         /* send number of requested data words to be written*/
1997         if ((retval=xscale_send_u32(target, count))!=ERROR_OK)
1998                 return retval;
1999
2000         /* extract data from host-endian buffer into byte stream */
2001 #if 0
2002         for (i = 0; i < count; i++)
2003         {
2004                 switch (size)
2005                 {
2006                         case 4:
2007                                 value = target_buffer_get_u32(target, buffer);
2008                                 xscale_send_u32(target, value);
2009                                 buffer += 4;
2010                                 break;
2011                         case 2:
2012                                 value = target_buffer_get_u16(target, buffer);
2013                                 xscale_send_u32(target, value);
2014                                 buffer += 2;
2015                                 break;
2016                         case 1:
2017                                 value = *buffer;
2018                                 xscale_send_u32(target, value);
2019                                 buffer += 1;
2020                                 break;
2021                         default:
2022                                 LOG_ERROR("should never get here");
2023                                 exit(-1);
2024                 }
2025         }
2026 #endif
2027         if ((retval=xscale_send(target, buffer, count, size))!=ERROR_OK)
2028                 return retval;
2029
2030         /* examine DCSR, to see if Sticky Abort (SA) got set */
2031         if ((retval=xscale_read_dcsr(target))!=ERROR_OK)
2032                 return retval;
2033         if (buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 5, 1) == 1)
2034         {
2035                 /* clear SA bit */
2036                 if ((retval=xscale_send_u32(target, 0x60))!=ERROR_OK)
2037                         return retval;
2038
2039                 return ERROR_TARGET_DATA_ABORT;
2040         }
2041
2042         return ERROR_OK;
2043 }
2044
2045 int xscale_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer)
2046 {
2047         return xscale_write_memory(target, address, 4, count, buffer);
2048 }
2049
2050 int xscale_checksum_memory(struct target_s *target, u32 address, u32 count, u32* checksum)
2051 {
2052         return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2053 }
2054
2055 u32 xscale_get_ttb(target_t *target)
2056 {
2057         armv4_5_common_t *armv4_5 = target->arch_info;
2058         xscale_common_t *xscale = armv4_5->arch_info;
2059         u32 ttb;
2060
2061         xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_TTB]);
2062         ttb = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_TTB].value, 0, 32);
2063
2064         return ttb;
2065 }
2066
2067 void xscale_disable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
2068 {
2069         armv4_5_common_t *armv4_5 = target->arch_info;
2070         xscale_common_t *xscale = armv4_5->arch_info;
2071         u32 cp15_control;
2072
2073         /* read cp15 control register */
2074         xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
2075         cp15_control = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
2076
2077         if (mmu)
2078                 cp15_control &= ~0x1U;
2079
2080         if (d_u_cache)
2081         {
2082                 /* clean DCache */
2083                 xscale_send_u32(target, 0x50);
2084                 xscale_send_u32(target, xscale->cache_clean_address);
2085
2086                 /* invalidate DCache */
2087                 xscale_send_u32(target, 0x51);
2088
2089                 cp15_control &= ~0x4U;
2090         }
2091
2092         if (i_cache)
2093         {
2094                 /* invalidate ICache */
2095                 xscale_send_u32(target, 0x52);
2096                 cp15_control &= ~0x1000U;
2097         }
2098
2099         /* write new cp15 control register */
2100         xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_CTRL], cp15_control);
2101
2102         /* execute cpwait to ensure outstanding operations complete */
2103         xscale_send_u32(target, 0x53);
2104 }
2105
2106 void xscale_enable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
2107 {
2108         armv4_5_common_t *armv4_5 = target->arch_info;
2109         xscale_common_t *xscale = armv4_5->arch_info;
2110         u32 cp15_control;
2111
2112         /* read cp15 control register */
2113         xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
2114         cp15_control = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
2115
2116         if (mmu)
2117                 cp15_control |= 0x1U;
2118
2119         if (d_u_cache)
2120                 cp15_control |= 0x4U;
2121
2122         if (i_cache)
2123                 cp15_control |= 0x1000U;
2124
2125         /* write new cp15 control register */
2126         xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_CTRL], cp15_control);
2127
2128         /* execute cpwait to ensure outstanding operations complete */
2129         xscale_send_u32(target, 0x53);
2130 }
2131
2132 int xscale_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
2133 {
2134         armv4_5_common_t *armv4_5 = target->arch_info;
2135         xscale_common_t *xscale = armv4_5->arch_info;
2136
2137         if (target->state != TARGET_HALTED)
2138         {
2139                 LOG_WARNING("target not halted");
2140                 return ERROR_TARGET_NOT_HALTED;
2141         }
2142
2143         if (xscale->force_hw_bkpts)
2144                 breakpoint->type = BKPT_HARD;
2145
2146         if (breakpoint->set)
2147         {
2148                 LOG_WARNING("breakpoint already set");
2149                 return ERROR_OK;
2150         }
2151
2152         if (breakpoint->type == BKPT_HARD)
2153         {
2154                 u32 value = breakpoint->address | 1;
2155                 if (!xscale->ibcr0_used)
2156                 {
2157                         xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR0], value);
2158                         xscale->ibcr0_used = 1;
2159                         breakpoint->set = 1;    /* breakpoint set on first breakpoint register */
2160                 }
2161                 else if (!xscale->ibcr1_used)
2162                 {
2163                         xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR1], value);
2164                         xscale->ibcr1_used = 1;
2165                         breakpoint->set = 2;    /* breakpoint set on second breakpoint register */
2166                 }
2167                 else
2168                 {
2169                         LOG_ERROR("BUG: no hardware comparator available");
2170                         return ERROR_OK;
2171                 }
2172         }
2173         else if (breakpoint->type == BKPT_SOFT)
2174         {
2175                 if (breakpoint->length == 4)
2176                 {
2177                         /* keep the original instruction in target endianness */
2178                         target->type->read_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr);
2179                         /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */
2180                         target_write_u32(target, breakpoint->address, xscale->arm_bkpt);
2181                 }
2182                 else
2183                 {
2184                         /* keep the original instruction in target endianness */
2185                         target->type->read_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr);
2186                         /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */
2187                         target_write_u32(target, breakpoint->address, xscale->thumb_bkpt);
2188                 }
2189                 breakpoint->set = 1;
2190         }
2191
2192         return ERROR_OK;
2193
2194 }
2195
2196 int xscale_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
2197 {
2198         armv4_5_common_t *armv4_5 = target->arch_info;
2199         xscale_common_t *xscale = armv4_5->arch_info;
2200
2201         if (target->state != TARGET_HALTED)
2202         {
2203                 LOG_WARNING("target not halted");
2204                 return ERROR_TARGET_NOT_HALTED;
2205         }
2206
2207         if (xscale->force_hw_bkpts)
2208         {
2209                 LOG_DEBUG("forcing use of hardware breakpoint at address 0x%8.8x", breakpoint->address);
2210                 breakpoint->type = BKPT_HARD;
2211         }
2212
2213         if ((breakpoint->type == BKPT_HARD) && (xscale->ibcr_available < 1))
2214         {
2215                 LOG_INFO("no breakpoint unit available for hardware breakpoint");
2216                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2217         }
2218         else
2219         {
2220                 xscale->ibcr_available--;
2221         }
2222
2223         if ((breakpoint->length != 2) && (breakpoint->length != 4))
2224         {
2225                 LOG_INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
2226                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2227         }
2228
2229         return ERROR_OK;
2230 }
2231
2232 int xscale_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
2233 {
2234         armv4_5_common_t *armv4_5 = target->arch_info;
2235         xscale_common_t *xscale = armv4_5->arch_info;
2236
2237         if (target->state != TARGET_HALTED)
2238         {
2239                 LOG_WARNING("target not halted");
2240                 return ERROR_TARGET_NOT_HALTED;
2241         }
2242
2243         if (!breakpoint->set)
2244         {
2245                 LOG_WARNING("breakpoint not set");
2246                 return ERROR_OK;
2247         }
2248
2249         if (breakpoint->type == BKPT_HARD)
2250         {
2251                 if (breakpoint->set == 1)
2252                 {
2253                         xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR0], 0x0);
2254                         xscale->ibcr0_used = 0;
2255                 }
2256                 else if (breakpoint->set == 2)
2257                 {
2258                         xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR1], 0x0);
2259                         xscale->ibcr1_used = 0;
2260                 }
2261                 breakpoint->set = 0;
2262         }
2263         else
2264         {
2265                 /* restore original instruction (kept in target endianness) */
2266                 if (breakpoint->length == 4)
2267                 {
2268                         target->type->write_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr);
2269                 }
2270                 else
2271                 {
2272                         target->type->write_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr);
2273                 }
2274                 breakpoint->set = 0;
2275         }
2276
2277         return ERROR_OK;
2278 }
2279
2280 int xscale_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
2281 {
2282         armv4_5_common_t *armv4_5 = target->arch_info;
2283         xscale_common_t *xscale = armv4_5->arch_info;
2284
2285         if (target->state != TARGET_HALTED)
2286         {
2287                 LOG_WARNING("target not halted");
2288                 return ERROR_TARGET_NOT_HALTED;
2289         }
2290
2291         if (breakpoint->set)
2292         {
2293                 xscale_unset_breakpoint(target, breakpoint);
2294         }
2295
2296         if (breakpoint->type == BKPT_HARD)
2297                 xscale->ibcr_available++;
2298
2299         return ERROR_OK;
2300 }
2301
2302 int xscale_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
2303 {
2304         armv4_5_common_t *armv4_5 = target->arch_info;
2305         xscale_common_t *xscale = armv4_5->arch_info;
2306         u8 enable=0;
2307         reg_t *dbcon = &xscale->reg_cache->reg_list[XSCALE_DBCON];
2308         u32 dbcon_value = buf_get_u32(dbcon->value, 0, 32);
2309
2310         if (target->state != TARGET_HALTED)
2311         {
2312                 LOG_WARNING("target not halted");
2313                 return ERROR_TARGET_NOT_HALTED;
2314         }
2315
2316         xscale_get_reg(dbcon);
2317
2318         switch (watchpoint->rw)
2319         {
2320                 case WPT_READ:
2321                         enable = 0x3;
2322                         break;
2323                 case WPT_ACCESS:
2324                         enable = 0x2;
2325                         break;
2326                 case WPT_WRITE:
2327                         enable = 0x1;
2328                         break;
2329                 default:
2330                         LOG_ERROR("BUG: watchpoint->rw neither read, write nor access");
2331         }
2332
2333         if (!xscale->dbr0_used)
2334         {
2335                 xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR0], watchpoint->address);
2336                 dbcon_value |= enable;
2337                 xscale_set_reg_u32(dbcon, dbcon_value);
2338                 watchpoint->set = 1;
2339                 xscale->dbr0_used = 1;
2340         }
2341         else if (!xscale->dbr1_used)
2342         {
2343                 xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR1], watchpoint->address);
2344                 dbcon_value |= enable << 2;
2345                 xscale_set_reg_u32(dbcon, dbcon_value);
2346                 watchpoint->set = 2;
2347                 xscale->dbr1_used = 1;
2348         }
2349         else
2350         {
2351                 LOG_ERROR("BUG: no hardware comparator available");
2352                 return ERROR_OK;
2353         }
2354
2355         return ERROR_OK;
2356 }
2357
2358 int xscale_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
2359 {
2360         armv4_5_common_t *armv4_5 = target->arch_info;
2361         xscale_common_t *xscale = armv4_5->arch_info;
2362
2363         if (target->state != TARGET_HALTED)
2364         {
2365                 LOG_WARNING("target not halted");
2366                 return ERROR_TARGET_NOT_HALTED;
2367         }
2368
2369         if (xscale->dbr_available < 1)
2370         {
2371                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2372         }
2373
2374         if ((watchpoint->length != 1) && (watchpoint->length != 2) && (watchpoint->length != 4))
2375         {
2376                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2377         }
2378
2379         xscale->dbr_available--;
2380
2381         return ERROR_OK;
2382 }
2383
2384 int xscale_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
2385 {
2386         armv4_5_common_t *armv4_5 = target->arch_info;
2387         xscale_common_t *xscale = armv4_5->arch_info;
2388         reg_t *dbcon = &xscale->reg_cache->reg_list[XSCALE_DBCON];
2389         u32 dbcon_value = buf_get_u32(dbcon->value, 0, 32);
2390
2391         if (target->state != TARGET_HALTED)
2392         {
2393                 LOG_WARNING("target not halted");
2394                 return ERROR_TARGET_NOT_HALTED;
2395         }
2396
2397         if (!watchpoint->set)
2398         {
2399                 LOG_WARNING("breakpoint not set");
2400                 return ERROR_OK;
2401         }
2402
2403         if (watchpoint->set == 1)
2404         {
2405                 dbcon_value &= ~0x3;
2406                 xscale_set_reg_u32(dbcon, dbcon_value);
2407                 xscale->dbr0_used = 0;
2408         }
2409         else if (watchpoint->set == 2)
2410         {
2411                 dbcon_value &= ~0xc;
2412                 xscale_set_reg_u32(dbcon, dbcon_value);
2413                 xscale->dbr1_used = 0;
2414         }
2415         watchpoint->set = 0;
2416
2417         return ERROR_OK;
2418 }
2419
2420 int xscale_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
2421 {
2422         armv4_5_common_t *armv4_5 = target->arch_info;
2423         xscale_common_t *xscale = armv4_5->arch_info;
2424
2425         if (target->state != TARGET_HALTED)
2426         {
2427                 LOG_WARNING("target not halted");
2428                 return ERROR_TARGET_NOT_HALTED;
2429         }
2430
2431         if (watchpoint->set)
2432         {
2433                 xscale_unset_watchpoint(target, watchpoint);
2434         }
2435
2436         xscale->dbr_available++;
2437
2438         return ERROR_OK;
2439 }
2440
2441 void xscale_enable_watchpoints(struct target_s *target)
2442 {
2443         watchpoint_t *watchpoint = target->watchpoints;
2444
2445         while (watchpoint)
2446         {
2447                 if (watchpoint->set == 0)
2448                         xscale_set_watchpoint(target, watchpoint);
2449                 watchpoint = watchpoint->next;
2450         }
2451 }
2452
2453 void xscale_enable_breakpoints(struct target_s *target)
2454 {
2455         breakpoint_t *breakpoint = target->breakpoints;
2456
2457         /* set any pending breakpoints */
2458         while (breakpoint)
2459         {
2460                 if (breakpoint->set == 0)
2461                         xscale_set_breakpoint(target, breakpoint);
2462                 breakpoint = breakpoint->next;
2463         }
2464 }
2465
2466 int xscale_get_reg(reg_t *reg)
2467 {
2468         xscale_reg_t *arch_info = reg->arch_info;
2469         target_t *target = arch_info->target;
2470         armv4_5_common_t *armv4_5 = target->arch_info;
2471         xscale_common_t *xscale = armv4_5->arch_info;
2472
2473         /* DCSR, TX and RX are accessible via JTAG */
2474         if (strcmp(reg->name, "XSCALE_DCSR") == 0)
2475         {
2476                 return xscale_read_dcsr(arch_info->target);
2477         }
2478         else if (strcmp(reg->name, "XSCALE_TX") == 0)
2479         {
2480                 /* 1 = consume register content */
2481                 return xscale_read_tx(arch_info->target, 1);
2482         }
2483         else if (strcmp(reg->name, "XSCALE_RX") == 0)
2484         {
2485                 /* can't read from RX register (host -> debug handler) */
2486                 return ERROR_OK;
2487         }
2488         else if (strcmp(reg->name, "XSCALE_TXRXCTRL") == 0)
2489         {
2490                 /* can't (explicitly) read from TXRXCTRL register */
2491                 return ERROR_OK;
2492         }
2493         else /* Other DBG registers have to be transfered by the debug handler */
2494         {
2495                 /* send CP read request (command 0x40) */
2496                 xscale_send_u32(target, 0x40);
2497
2498                 /* send CP register number */
2499                 xscale_send_u32(target, arch_info->dbg_handler_number);
2500
2501                 /* read register value */
2502                 xscale_read_tx(target, 1);
2503                 buf_cpy(xscale->reg_cache->reg_list[XSCALE_TX].value, reg->value, 32);
2504
2505                 reg->dirty = 0;
2506                 reg->valid = 1;
2507         }
2508
2509         return ERROR_OK;
2510 }
2511
2512 int xscale_set_reg(reg_t *reg, u8* buf)
2513 {
2514         xscale_reg_t *arch_info = reg->arch_info;
2515         target_t *target = arch_info->target;
2516         armv4_5_common_t *armv4_5 = target->arch_info;
2517         xscale_common_t *xscale = armv4_5->arch_info;
2518         u32 value = buf_get_u32(buf, 0, 32);
2519
2520         /* DCSR, TX and RX are accessible via JTAG */
2521         if (strcmp(reg->name, "XSCALE_DCSR") == 0)
2522         {
2523                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 0, 32, value);
2524                 return xscale_write_dcsr(arch_info->target, -1, -1);
2525         }
2526         else if (strcmp(reg->name, "XSCALE_RX") == 0)
2527         {
2528                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_RX].value, 0, 32, value);
2529                 return xscale_write_rx(arch_info->target);
2530         }
2531         else if (strcmp(reg->name, "XSCALE_TX") == 0)
2532         {
2533                 /* can't write to TX register (debug-handler -> host) */
2534                 return ERROR_OK;
2535         }
2536         else if (strcmp(reg->name, "XSCALE_TXRXCTRL") == 0)
2537         {
2538                 /* can't (explicitly) write to TXRXCTRL register */
2539                 return ERROR_OK;
2540         }
2541         else /* Other DBG registers have to be transfered by the debug handler */
2542         {
2543                 /* send CP write request (command 0x41) */
2544                 xscale_send_u32(target, 0x41);
2545
2546                 /* send CP register number */
2547                 xscale_send_u32(target, arch_info->dbg_handler_number);
2548
2549                 /* send CP register value */
2550                 xscale_send_u32(target, value);
2551                 buf_set_u32(reg->value, 0, 32, value);
2552         }
2553
2554         return ERROR_OK;
2555 }
2556
2557 /* convenience wrapper to access XScale specific registers */
2558 int xscale_set_reg_u32(reg_t *reg, u32 value)
2559 {
2560         u8 buf[4];
2561
2562         buf_set_u32(buf, 0, 32, value);
2563
2564         return xscale_set_reg(reg, buf);
2565 }
2566
2567 int xscale_write_dcsr_sw(target_t *target, u32 value)
2568 {
2569         /* get pointers to arch-specific information */
2570         armv4_5_common_t *armv4_5 = target->arch_info;
2571         xscale_common_t *xscale = armv4_5->arch_info;
2572         reg_t *dcsr = &xscale->reg_cache->reg_list[XSCALE_DCSR];
2573         xscale_reg_t *dcsr_arch_info = dcsr->arch_info;
2574
2575         /* send CP write request (command 0x41) */
2576         xscale_send_u32(target, 0x41);
2577
2578         /* send CP register number */
2579         xscale_send_u32(target, dcsr_arch_info->dbg_handler_number);
2580
2581         /* send CP register value */
2582         xscale_send_u32(target, value);
2583         buf_set_u32(dcsr->value, 0, 32, value);
2584
2585         return ERROR_OK;
2586 }
2587
2588 int xscale_read_trace(target_t *target)
2589 {
2590         /* get pointers to arch-specific information */
2591         armv4_5_common_t *armv4_5 = target->arch_info;
2592         xscale_common_t *xscale = armv4_5->arch_info;
2593         xscale_trace_data_t **trace_data_p;
2594
2595         /* 258 words from debug handler
2596          * 256 trace buffer entries
2597          * 2 checkpoint addresses
2598          */
2599         u32 trace_buffer[258];
2600         int is_address[256];
2601         int i, j;
2602
2603         if (target->state != TARGET_HALTED)
2604         {
2605                 LOG_WARNING("target must be stopped to read trace data");
2606                 return ERROR_TARGET_NOT_HALTED;
2607         }
2608
2609         /* send read trace buffer command (command 0x61) */
2610         xscale_send_u32(target, 0x61);
2611
2612         /* receive trace buffer content */
2613         xscale_receive(target, trace_buffer, 258);
2614
2615         /* parse buffer backwards to identify address entries */
2616         for (i = 255; i >= 0; i--)
2617         {
2618                 is_address[i] = 0;
2619                 if (((trace_buffer[i] & 0xf0) == 0x90) ||
2620                         ((trace_buffer[i] & 0xf0) == 0xd0))
2621                 {
2622                         if (i >= 3)
2623                                 is_address[--i] = 1;
2624                         if (i >= 2)
2625                                 is_address[--i] = 1;
2626                         if (i >= 1)
2627                                 is_address[--i] = 1;
2628                         if (i >= 0)
2629                                 is_address[--i] = 1;
2630                 }
2631         }
2632
2633
2634         /* search first non-zero entry */
2635         for (j = 0; (j < 256) && (trace_buffer[j] == 0) && (!is_address[j]); j++)
2636                 ;
2637
2638         if (j == 256)
2639         {
2640                 LOG_DEBUG("no trace data collected");
2641                 return ERROR_XSCALE_NO_TRACE_DATA;
2642         }
2643
2644         for (trace_data_p = &xscale->trace.data; *trace_data_p; trace_data_p = &(*trace_data_p)->next)
2645                 ;
2646
2647         *trace_data_p = malloc(sizeof(xscale_trace_data_t));
2648         (*trace_data_p)->next = NULL;
2649         (*trace_data_p)->chkpt0 = trace_buffer[256];
2650         (*trace_data_p)->chkpt1 = trace_buffer[257];
2651         (*trace_data_p)->last_instruction = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
2652         (*trace_data_p)->entries = malloc(sizeof(xscale_trace_entry_t) * (256 - j));
2653         (*trace_data_p)->depth = 256 - j;
2654
2655         for (i = j; i < 256; i++)
2656         {
2657                 (*trace_data_p)->entries[i - j].data = trace_buffer[i];
2658                 if (is_address[i])
2659                         (*trace_data_p)->entries[i - j].type = XSCALE_TRACE_ADDRESS;
2660                 else
2661                         (*trace_data_p)->entries[i - j].type = XSCALE_TRACE_MESSAGE;
2662         }
2663
2664         return ERROR_OK;
2665 }
2666
2667 int xscale_read_instruction(target_t *target, arm_instruction_t *instruction)
2668 {
2669         /* get pointers to arch-specific information */
2670         armv4_5_common_t *armv4_5 = target->arch_info;
2671         xscale_common_t *xscale = armv4_5->arch_info;
2672         int i;
2673         int section = -1;
2674         u32 size_read;
2675         u32 opcode;
2676         int retval;
2677
2678         if (!xscale->trace.image)
2679                 return ERROR_TRACE_IMAGE_UNAVAILABLE;
2680
2681         /* search for the section the current instruction belongs to */
2682         for (i = 0; i < xscale->trace.image->num_sections; i++)
2683         {
2684                 if ((xscale->trace.image->sections[i].base_address <= xscale->trace.current_pc) &&
2685                         (xscale->trace.image->sections[i].base_address + xscale->trace.image->sections[i].size > xscale->trace.current_pc))
2686                 {
2687                         section = i;
2688                         break;
2689                 }
2690         }
2691
2692         if (section == -1)
2693         {
2694                 /* current instruction couldn't be found in the image */
2695                 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
2696         }
2697
2698         if (xscale->trace.core_state == ARMV4_5_STATE_ARM)
2699         {
2700                 u8 buf[4];
2701                 if ((retval = image_read_section(xscale->trace.image, section,
2702                         xscale->trace.current_pc - xscale->trace.image->sections[section].base_address,
2703                         4, buf, &size_read)) != ERROR_OK)
2704                 {
2705                         LOG_ERROR("error while reading instruction: %i", retval);
2706                         return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
2707                 }
2708                 opcode = target_buffer_get_u32(target, buf);
2709                 arm_evaluate_opcode(opcode, xscale->trace.current_pc, instruction);
2710         }
2711         else if (xscale->trace.core_state == ARMV4_5_STATE_THUMB)
2712         {
2713                 u8 buf[2];
2714                 if ((retval = image_read_section(xscale->trace.image, section,
2715                         xscale->trace.current_pc - xscale->trace.image->sections[section].base_address,
2716                         2, buf, &size_read)) != ERROR_OK)
2717                 {
2718                         LOG_ERROR("error while reading instruction: %i", retval);
2719                         return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
2720                 }
2721                 opcode = target_buffer_get_u16(target, buf);
2722                 thumb_evaluate_opcode(opcode, xscale->trace.current_pc, instruction);
2723         }
2724         else
2725         {
2726                 LOG_ERROR("BUG: unknown core state encountered");
2727                 exit(-1);
2728         }
2729
2730         return ERROR_OK;
2731 }
2732
2733 int xscale_branch_address(xscale_trace_data_t *trace_data, int i, u32 *target)
2734 {
2735         /* if there are less than four entries prior to the indirect branch message
2736          * we can't extract the address */
2737         if (i < 4)
2738         {
2739                 return -1;
2740         }
2741
2742         *target = (trace_data->entries[i-1].data) | (trace_data->entries[i-2].data << 8) |
2743                                 (trace_data->entries[i-3].data << 16) | (trace_data->entries[i-4].data << 24);
2744
2745         return 0;
2746 }
2747
2748 int xscale_analyze_trace(target_t *target, command_context_t *cmd_ctx)
2749 {
2750         /* get pointers to arch-specific information */
2751         armv4_5_common_t *armv4_5 = target->arch_info;
2752         xscale_common_t *xscale = armv4_5->arch_info;
2753         int next_pc_ok = 0;
2754         u32 next_pc = 0x0;
2755         xscale_trace_data_t *trace_data = xscale->trace.data;
2756         int retval;
2757
2758         while (trace_data)
2759         {
2760                 int i, chkpt;
2761                 int rollover;
2762                 int branch;
2763                 int exception;
2764                 xscale->trace.core_state = ARMV4_5_STATE_ARM;
2765
2766                 chkpt = 0;
2767                 rollover = 0;
2768
2769                 for (i = 0; i < trace_data->depth; i++)
2770                 {
2771                         next_pc_ok = 0;
2772                         branch = 0;
2773                         exception = 0;
2774
2775                         if (trace_data->entries[i].type == XSCALE_TRACE_ADDRESS)
2776                                 continue;
2777
2778                         switch ((trace_data->entries[i].data & 0xf0) >> 4)
2779                         {
2780                                 case 0:         /* Exceptions */
2781                                 case 1:
2782                                 case 2:
2783                                 case 3:
2784                                 case 4:
2785                                 case 5:
2786                                 case 6:
2787                                 case 7:
2788                                         exception = (trace_data->entries[i].data & 0x70) >> 4;
2789                                         next_pc_ok = 1;
2790                                         next_pc = (trace_data->entries[i].data & 0xf0) >> 2;
2791                                         command_print(cmd_ctx, "--- exception %i ---", (trace_data->entries[i].data & 0xf0) >> 4);
2792                                         break;
2793                                 case 8:         /* Direct Branch */
2794                                         branch = 1;
2795                                         break;
2796                                 case 9:         /* Indirect Branch */
2797                                         branch = 1;
2798                                         if (xscale_branch_address(trace_data, i, &next_pc) == 0)
2799                                         {
2800                                                 next_pc_ok = 1;
2801                                         }
2802                                         break;
2803                                 case 13:        /* Checkpointed Indirect Branch */
2804                                         if (xscale_branch_address(trace_data, i, &next_pc) == 0)
2805                                         {
2806                                                 next_pc_ok = 1;
2807                                                 if (((chkpt == 0) && (next_pc != trace_data->chkpt0))
2808                                                         || ((chkpt == 1) && (next_pc != trace_data->chkpt1)))
2809                                                         LOG_WARNING("checkpointed indirect branch target address doesn't match checkpoint");
2810                                         }
2811                                         /* explicit fall-through */
2812                                 case 12:        /* Checkpointed Direct Branch */
2813                                         branch = 1;
2814                                         if (chkpt == 0)
2815                                         {
2816                                                 next_pc_ok = 1;
2817                                                 next_pc = trace_data->chkpt0;
2818                                                 chkpt++;
2819                                         }
2820                                         else if (chkpt == 1)
2821                                         {
2822                                                 next_pc_ok = 1;
2823                                                 next_pc = trace_data->chkpt0;
2824                                                 chkpt++;
2825                                         }
2826                                         else
2827                                         {
2828                                                 LOG_WARNING("more than two checkpointed branches encountered");
2829                                         }
2830                                         break;
2831                                 case 15:        /* Roll-over */
2832                                         rollover++;
2833                                         continue;
2834                                 default:        /* Reserved */
2835                                         command_print(cmd_ctx, "--- reserved trace message ---");
2836                                         LOG_ERROR("BUG: trace message %i is reserved", (trace_data->entries[i].data & 0xf0) >> 4);
2837                                         return ERROR_OK;
2838                         }
2839
2840                         if (xscale->trace.pc_ok)
2841                         {
2842                                 int executed = (trace_data->entries[i].data & 0xf) + rollover * 16;
2843                                 arm_instruction_t instruction;
2844
2845                                 if ((exception == 6) || (exception == 7))
2846                                 {
2847                                         /* IRQ or FIQ exception, no instruction executed */
2848                                         executed -= 1;
2849                                 }
2850
2851                                 while (executed-- >= 0)
2852                                 {
2853                                         if ((retval = xscale_read_instruction(target, &instruction)) != ERROR_OK)
2854                                         {
2855                                                 /* can't continue tracing with no image available */
2856                                                 if (retval == ERROR_TRACE_IMAGE_UNAVAILABLE)
2857                                                 {
2858                                                         return retval;
2859                                                 }
2860                                                 else if (retval == ERROR_TRACE_INSTRUCTION_UNAVAILABLE)
2861                                                 {
2862                                                         /* TODO: handle incomplete images */
2863                                                 }
2864                                         }
2865
2866                                         /* a precise abort on a load to the PC is included in the incremental
2867                                          * word count, other instructions causing data aborts are not included
2868                                          */
2869                                         if ((executed == 0) && (exception == 4)
2870                                                 && ((instruction.type >= ARM_LDR) && (instruction.type <= ARM_LDM)))
2871                                         {
2872                                                 if ((instruction.type == ARM_LDM)
2873                                                         && ((instruction.info.load_store_multiple.register_list & 0x8000) == 0))
2874                                                 {
2875                                                         executed--;
2876                                                 }
2877                                                 else if (((instruction.type >= ARM_LDR) && (instruction.type <= ARM_LDRSH))
2878                                                         && (instruction.info.load_store.Rd != 15))
2879                                                 {
2880                                                         executed--;
2881                                                 }
2882                                         }
2883
2884                                         /* only the last instruction executed
2885                                          * (the one that caused the control flow change)
2886                                          * could be a taken branch
2887                                          */
2888                                         if (((executed == -1) && (branch == 1)) &&
2889                                                 (((instruction.type == ARM_B) ||
2890                                                         (instruction.type == ARM_BL) ||
2891                                                         (instruction.type == ARM_BLX)) &&
2892                                                         (instruction.info.b_bl_bx_blx.target_address != -1)))
2893                                         {
2894                                                 xscale->trace.current_pc = instruction.info.b_bl_bx_blx.target_address;
2895                                         }
2896                                         else
2897                                         {
2898                                                 xscale->trace.current_pc += (xscale->trace.core_state == ARMV4_5_STATE_ARM) ? 4 : 2;
2899                                         }
2900                                         command_print(cmd_ctx, "%s", instruction.text);
2901                                 }
2902
2903                                 rollover = 0;
2904                         }
2905
2906                         if (next_pc_ok)
2907                         {
2908                                 xscale->trace.current_pc = next_pc;
2909                                 xscale->trace.pc_ok = 1;
2910                         }
2911                 }
2912
2913                 for (; xscale->trace.current_pc < trace_data->last_instruction; xscale->trace.current_pc += (xscale->trace.core_state == ARMV4_5_STATE_ARM) ? 4 : 2)
2914                 {
2915                         arm_instruction_t instruction;
2916                         if ((retval = xscale_read_instruction(target, &instruction)) != ERROR_OK)
2917                         {
2918                                 /* can't continue tracing with no image available */
2919                                 if (retval == ERROR_TRACE_IMAGE_UNAVAILABLE)
2920                                 {
2921                                         return retval;
2922                                 }
2923                                 else if (retval == ERROR_TRACE_INSTRUCTION_UNAVAILABLE)
2924                                 {
2925                                         /* TODO: handle incomplete images */
2926                                 }
2927                         }
2928                         command_print(cmd_ctx, "%s", instruction.text);
2929                 }
2930
2931                 trace_data = trace_data->next;
2932         }
2933
2934         return ERROR_OK;
2935 }
2936
2937 void xscale_build_reg_cache(target_t *target)
2938 {
2939         /* get pointers to arch-specific information */
2940         armv4_5_common_t *armv4_5 = target->arch_info;
2941         xscale_common_t *xscale = armv4_5->arch_info;
2942
2943         reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
2944         xscale_reg_t *arch_info = malloc(sizeof(xscale_reg_arch_info));
2945         int i;
2946         int num_regs = sizeof(xscale_reg_arch_info) / sizeof(xscale_reg_t);
2947
2948         (*cache_p) = armv4_5_build_reg_cache(target, armv4_5);
2949         armv4_5->core_cache = (*cache_p);
2950
2951         /* register a register arch-type for XScale dbg registers only once */
2952         if (xscale_reg_arch_type == -1)
2953                 xscale_reg_arch_type = register_reg_arch_type(xscale_get_reg, xscale_set_reg);
2954
2955         (*cache_p)->next = malloc(sizeof(reg_cache_t));
2956         cache_p = &(*cache_p)->next;
2957
2958         /* fill in values for the xscale reg cache */
2959         (*cache_p)->name = "XScale registers";
2960         (*cache_p)->next = NULL;
2961         (*cache_p)->reg_list = malloc(num_regs * sizeof(reg_t));
2962         (*cache_p)->num_regs = num_regs;
2963
2964         for (i = 0; i < num_regs; i++)
2965         {
2966                 (*cache_p)->reg_list[i].name = xscale_reg_list[i];
2967                 (*cache_p)->reg_list[i].value = calloc(4, 1);
2968                 (*cache_p)->reg_list[i].dirty = 0;
2969                 (*cache_p)->reg_list[i].valid = 0;
2970                 (*cache_p)->reg_list[i].size = 32;
2971                 (*cache_p)->reg_list[i].bitfield_desc = NULL;
2972                 (*cache_p)->reg_list[i].num_bitfields = 0;
2973                 (*cache_p)->reg_list[i].arch_info = &arch_info[i];
2974                 (*cache_p)->reg_list[i].arch_type = xscale_reg_arch_type;
2975                 arch_info[i] = xscale_reg_arch_info[i];
2976                 arch_info[i].target = target;
2977         }
2978
2979         xscale->reg_cache = (*cache_p);
2980 }
2981
2982 int xscale_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
2983 {
2984         return ERROR_OK;
2985 }
2986
2987 int xscale_quit()
2988 {
2989
2990         return ERROR_OK;
2991 }
2992
2993 int xscale_init_arch_info(target_t *target, xscale_common_t *xscale, int chain_pos, char *variant)
2994 {
2995         armv4_5_common_t *armv4_5;
2996         u32 high_reset_branch, low_reset_branch;
2997         int i;
2998
2999         armv4_5 = &xscale->armv4_5_common;
3000
3001         /* store architecture specfic data (none so far) */
3002         xscale->arch_info = NULL;
3003         xscale->common_magic = XSCALE_COMMON_MAGIC;
3004
3005         /* remember the variant (PXA25x, PXA27x, IXP42x, ...) */
3006         xscale->variant = strdup(variant);
3007
3008         /* prepare JTAG information for the new target */
3009         xscale->jtag_info.chain_pos = chain_pos;
3010
3011         xscale->jtag_info.dbgrx = 0x02;
3012         xscale->jtag_info.dbgtx = 0x10;
3013         xscale->jtag_info.dcsr = 0x09;
3014         xscale->jtag_info.ldic = 0x07;
3015
3016         if ((strcmp(xscale->variant, "pxa250") == 0) ||
3017                 (strcmp(xscale->variant, "pxa255") == 0) ||
3018                 (strcmp(xscale->variant, "pxa26x") == 0))
3019         {
3020                 xscale->jtag_info.ir_length = 5;
3021         }
3022         else if ((strcmp(xscale->variant, "pxa27x") == 0) ||
3023                 (strcmp(xscale->variant, "ixp42x") == 0) ||
3024                 (strcmp(xscale->variant, "ixp45x") == 0) ||
3025                 (strcmp(xscale->variant, "ixp46x") == 0))
3026         {
3027                 xscale->jtag_info.ir_length = 7;
3028         }
3029
3030         /* the debug handler isn't installed (and thus not running) at this time */
3031         xscale->handler_installed = 0;
3032         xscale->handler_running = 0;
3033         xscale->handler_address = 0xfe000800;
3034
3035         /* clear the vectors we keep locally for reference */
3036         memset(xscale->low_vectors, 0, sizeof(xscale->low_vectors));
3037         memset(xscale->high_vectors, 0, sizeof(xscale->high_vectors));
3038
3039         /* no user-specified vectors have been configured yet */
3040         xscale->static_low_vectors_set = 0x0;
3041         xscale->static_high_vectors_set = 0x0;
3042
3043         /* calculate branches to debug handler */
3044         low_reset_branch = (xscale->handler_address + 0x20 - 0x0 - 0x8) >> 2;
3045         high_reset_branch = (xscale->handler_address + 0x20 - 0xffff0000 - 0x8) >> 2;
3046
3047         xscale->low_vectors[0] = ARMV4_5_B((low_reset_branch & 0xffffff), 0);
3048         xscale->high_vectors[0] = ARMV4_5_B((high_reset_branch & 0xffffff), 0);
3049
3050         for (i = 1; i <= 7; i++)
3051         {
3052                 xscale->low_vectors[i] = ARMV4_5_B(0xfffffe, 0);
3053                 xscale->high_vectors[i] = ARMV4_5_B(0xfffffe, 0);
3054         }
3055
3056         /* 64kB aligned region used for DCache cleaning */
3057         xscale->cache_clean_address = 0xfffe0000;
3058
3059         xscale->hold_rst = 0;
3060         xscale->external_debug_break = 0;
3061
3062         xscale->force_hw_bkpts = 1;
3063
3064         xscale->ibcr_available = 2;
3065         xscale->ibcr0_used = 0;
3066         xscale->ibcr1_used = 0;
3067
3068         xscale->dbr_available = 2;
3069         xscale->dbr0_used = 0;
3070         xscale->dbr1_used = 0;
3071
3072         xscale->arm_bkpt = ARMV5_BKPT(0x0);
3073         xscale->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
3074
3075         xscale->vector_catch = 0x1;
3076
3077         xscale->trace.capture_status = TRACE_IDLE;
3078         xscale->trace.data = NULL;
3079         xscale->trace.image = NULL;
3080         xscale->trace.buffer_enabled = 0;
3081         xscale->trace.buffer_fill = 0;
3082
3083         /* prepare ARMv4/5 specific information */
3084         armv4_5->arch_info = xscale;
3085         armv4_5->read_core_reg = xscale_read_core_reg;
3086         armv4_5->write_core_reg = xscale_write_core_reg;
3087         armv4_5->full_context = xscale_full_context;
3088
3089         armv4_5_init_arch_info(target, armv4_5);
3090
3091         xscale->armv4_5_mmu.armv4_5_cache.ctype = -1;
3092         xscale->armv4_5_mmu.get_ttb = xscale_get_ttb;
3093         xscale->armv4_5_mmu.read_memory = xscale_read_memory;
3094         xscale->armv4_5_mmu.write_memory = xscale_write_memory;
3095         xscale->armv4_5_mmu.disable_mmu_caches = xscale_disable_mmu_caches;
3096         xscale->armv4_5_mmu.enable_mmu_caches = xscale_enable_mmu_caches;
3097         xscale->armv4_5_mmu.has_tiny_pages = 1;
3098         xscale->armv4_5_mmu.mmu_enabled = 0;
3099
3100         return ERROR_OK;
3101 }
3102
3103 /* target xscale <endianess> <startup_mode> <chain_pos> <variant> */
3104 int xscale_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
3105 {
3106         int chain_pos;
3107         char *variant = NULL;
3108         xscale_common_t *xscale = malloc(sizeof(xscale_common_t));
3109         memset(xscale, 0, sizeof(*xscale));
3110
3111         if (argc < 5)
3112         {
3113                 LOG_ERROR("'target xscale' requires four arguments: <endianess> <startup_mode> <chain_pos> <variant>");
3114                 return ERROR_OK;
3115         }
3116
3117         chain_pos = strtoul(args[3], NULL, 0);
3118
3119         variant = args[4];
3120
3121         xscale_init_arch_info(target, xscale, chain_pos, variant);
3122         xscale_build_reg_cache(target);
3123
3124         return ERROR_OK;
3125 }
3126
3127 int xscale_handle_debug_handler_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3128 {
3129         target_t *target = NULL;
3130         armv4_5_common_t *armv4_5;
3131         xscale_common_t *xscale;
3132
3133         u32 handler_address;
3134
3135         if (argc < 2)
3136         {
3137                 LOG_ERROR("'xscale debug_handler <target#> <address>' command takes two required operands");
3138                 return ERROR_OK;
3139         }
3140
3141         if ((target = get_target_by_num(strtoul(args[0], NULL, 0))) == NULL)
3142         {
3143                 LOG_ERROR("no target '%s' configured", args[0]);
3144                 return ERROR_OK;
3145         }
3146
3147         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3148         {
3149                 return ERROR_OK;
3150         }
3151
3152         handler_address = strtoul(args[1], NULL, 0);
3153
3154         if (((handler_address >= 0x800) && (handler_address <= 0x1fef800)) ||
3155                 ((handler_address >= 0xfe000800) && (handler_address <= 0xfffff800)))
3156         {
3157                 xscale->handler_address = handler_address;
3158         }
3159         else
3160         {
3161                 LOG_ERROR("xscale debug_handler <address> must be between 0x800 and 0x1fef800 or between 0xfe000800 and 0xfffff800");
3162         }
3163
3164         return ERROR_OK;
3165 }
3166
3167 int xscale_handle_cache_clean_address_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3168 {
3169         target_t *target = NULL;
3170         armv4_5_common_t *armv4_5;
3171         xscale_common_t *xscale;
3172
3173         u32 cache_clean_address;
3174
3175         if (argc < 2)
3176         {
3177                 LOG_ERROR("'xscale cache_clean_address <target#> <address>' command takes two required operands");
3178                 return ERROR_OK;
3179         }
3180
3181         if ((target = get_target_by_num(strtoul(args[0], NULL, 0))) == NULL)
3182         {
3183                 LOG_ERROR("no target '%s' configured", args[0]);
3184                 return ERROR_OK;
3185         }
3186
3187         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3188         {
3189                 return ERROR_OK;
3190         }
3191
3192         cache_clean_address = strtoul(args[1], NULL, 0);
3193
3194         if (cache_clean_address & 0xffff)
3195         {
3196                 LOG_ERROR("xscale cache_clean_address <address> must be 64kb aligned");
3197         }
3198         else
3199         {
3200                 xscale->cache_clean_address = cache_clean_address;
3201         }
3202
3203         return ERROR_OK;
3204 }
3205
3206 int xscale_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3207 {
3208         target_t *target = get_current_target(cmd_ctx);
3209         armv4_5_common_t *armv4_5;
3210         xscale_common_t *xscale;
3211
3212         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3213         {
3214                 return ERROR_OK;
3215         }
3216
3217         return armv4_5_handle_cache_info_command(cmd_ctx, &xscale->armv4_5_mmu.armv4_5_cache);
3218 }
3219
3220 static int xscale_virt2phys(struct target_s *target, u32 virtual, u32 *physical)
3221 {
3222         armv4_5_common_t *armv4_5;
3223         xscale_common_t *xscale;
3224         int retval;
3225         int type;
3226         u32 cb;
3227         int domain;
3228         u32 ap;
3229
3230
3231         if ((retval = xscale_get_arch_pointers(target, &armv4_5, &xscale)) != ERROR_OK)
3232         {
3233                 return retval;
3234         }
3235         u32 ret = armv4_5_mmu_translate_va(target, &xscale->armv4_5_mmu, virtual, &type, &cb, &domain, &ap);
3236         if (type == -1)
3237         {
3238                 return ret;
3239         }
3240         *physical = ret;
3241         return ERROR_OK;
3242 }
3243
3244 static int xscale_mmu(struct target_s *target, int *enabled)
3245 {
3246         armv4_5_common_t *armv4_5 = target->arch_info;
3247         xscale_common_t *xscale = armv4_5->arch_info;
3248
3249         if (target->state != TARGET_HALTED)
3250         {
3251                 LOG_ERROR("Target not halted");
3252                 return ERROR_TARGET_INVALID;
3253         }
3254         *enabled = xscale->armv4_5_mmu.mmu_enabled;
3255         return ERROR_OK;
3256 }
3257
3258
3259 int xscale_handle_mmu_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
3260 {
3261         target_t *target = get_current_target(cmd_ctx);
3262         armv4_5_common_t *armv4_5;
3263         xscale_common_t *xscale;
3264
3265         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3266         {
3267                 return ERROR_OK;
3268         }
3269
3270         if (target->state != TARGET_HALTED)
3271         {
3272                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
3273                 return ERROR_OK;
3274         }
3275
3276         if (argc >= 1)
3277         {
3278                 if (strcmp("enable", args[0]) == 0)
3279                 {
3280                         xscale_enable_mmu_caches(target, 1, 0, 0);
3281                         xscale->armv4_5_mmu.mmu_enabled = 1;
3282                 }
3283                 else if (strcmp("disable", args[0]) == 0)
3284                 {
3285                         xscale_disable_mmu_caches(target, 1, 0, 0);
3286                         xscale->armv4_5_mmu.mmu_enabled = 0;
3287                 }
3288         }
3289
3290         command_print(cmd_ctx, "mmu %s", (xscale->armv4_5_mmu.mmu_enabled) ? "enabled" : "disabled");
3291
3292         return ERROR_OK;
3293 }
3294
3295 int xscale_handle_idcache_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
3296 {
3297         target_t *target = get_current_target(cmd_ctx);
3298         armv4_5_common_t *armv4_5;
3299         xscale_common_t *xscale;
3300         int icache = 0, dcache = 0;
3301
3302         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3303         {
3304                 return ERROR_OK;
3305         }
3306
3307         if (target->state != TARGET_HALTED)
3308         {
3309                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
3310                 return ERROR_OK;
3311         }
3312
3313         if (strcmp(cmd, "icache") == 0)
3314                 icache = 1;
3315         else if (strcmp(cmd, "dcache") == 0)
3316                 dcache = 1;
3317
3318         if (argc >= 1)
3319         {
3320                 if (strcmp("enable", args[0]) == 0)
3321                 {
3322                         xscale_enable_mmu_caches(target, 0, dcache, icache);
3323
3324                         if (icache)
3325                                 xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 1;
3326                         else if (dcache)
3327                                 xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 1;
3328                 }
3329                 else if (strcmp("disable", args[0]) == 0)
3330                 {
3331                         xscale_disable_mmu_caches(target, 0, dcache, icache);
3332
3333                         if (icache)
3334                                 xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
3335                         else if (dcache)
3336                                 xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
3337                 }
3338         }
3339
3340         if (icache)
3341                 command_print(cmd_ctx, "icache %s", (xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled) ? "enabled" : "disabled");
3342
3343         if (dcache)
3344                 command_print(cmd_ctx, "dcache %s", (xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled) ? "enabled" : "disabled");
3345
3346         return ERROR_OK;
3347 }
3348
3349 int xscale_handle_vector_catch_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
3350 {
3351         target_t *target = get_current_target(cmd_ctx);
3352         armv4_5_common_t *armv4_5;
3353         xscale_common_t *xscale;
3354
3355         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3356         {
3357                 return ERROR_OK;
3358         }
3359
3360         if (argc < 1)
3361         {
3362                 command_print(cmd_ctx, "usage: xscale vector_catch [mask]");
3363         }
3364         else
3365         {
3366                 xscale->vector_catch = strtoul(args[0], NULL, 0);
3367                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 8, xscale->vector_catch);
3368                 xscale_write_dcsr(target, -1, -1);
3369         }
3370
3371         command_print(cmd_ctx, "vector catch mask: 0x%2.2x", xscale->vector_catch);
3372
3373         return ERROR_OK;
3374 }
3375
3376 int xscale_handle_force_hw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3377 {
3378         target_t *target = get_current_target(cmd_ctx);
3379         armv4_5_common_t *armv4_5;
3380         xscale_common_t *xscale;
3381
3382         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3383         {
3384                 return ERROR_OK;
3385         }
3386
3387         if ((argc >= 1) && (strcmp("enable", args[0]) == 0))
3388         {
3389                 xscale->force_hw_bkpts = 1;
3390         }
3391         else if ((argc >= 1) && (strcmp("disable", args[0]) == 0))
3392         {
3393                 xscale->force_hw_bkpts = 0;
3394         }
3395         else
3396         {
3397                 command_print(cmd_ctx, "usage: xscale force_hw_bkpts <enable|disable>");
3398         }
3399
3400         command_print(cmd_ctx, "force hardware breakpoints %s", (xscale->force_hw_bkpts) ? "enabled" : "disabled");
3401
3402         return ERROR_OK;
3403 }
3404
3405 int xscale_handle_trace_buffer_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3406 {
3407         target_t *target = get_current_target(cmd_ctx);
3408         armv4_5_common_t *armv4_5;
3409         xscale_common_t *xscale;
3410         u32 dcsr_value;
3411
3412         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3413         {
3414                 return ERROR_OK;
3415         }
3416
3417         if (target->state != TARGET_HALTED)
3418         {
3419                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
3420                 return ERROR_OK;
3421         }
3422
3423         if ((argc >= 1) && (strcmp("enable", args[0]) == 0))
3424         {
3425                 xscale_trace_data_t *td, *next_td;
3426                 xscale->trace.buffer_enabled = 1;
3427
3428                 /* free old trace data */
3429                 td = xscale->trace.data;
3430                 while (td)
3431                 {
3432                         next_td = td->next;
3433
3434                         if (td->entries)
3435                                 free(td->entries);
3436                         free(td);
3437                         td = next_td;
3438                 }
3439                 xscale->trace.data = NULL;
3440         }
3441         else if ((argc >= 1) && (strcmp("disable", args[0]) == 0))
3442         {
3443                 xscale->trace.buffer_enabled = 0;
3444         }
3445
3446         if ((argc >= 2) && (strcmp("fill", args[1]) == 0))
3447         {
3448                 if (argc >= 3)
3449                         xscale->trace.buffer_fill = strtoul(args[2], NULL, 0);
3450                 else
3451                         xscale->trace.buffer_fill = 1;
3452         }
3453         else if ((argc >= 2) && (strcmp("wrap", args[1]) == 0))
3454         {
3455                 xscale->trace.buffer_fill = -1;
3456         }
3457
3458         if (xscale->trace.buffer_enabled)
3459         {
3460                 /* if we enable the trace buffer in fill-once
3461                  * mode we know the address of the first instruction */
3462                 xscale->trace.pc_ok = 1;
3463                 xscale->trace.current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
3464         }
3465         else
3466         {
3467                 /* otherwise the address is unknown, and we have no known good PC */
3468                 xscale->trace.pc_ok = 0;
3469         }
3470
3471         command_print(cmd_ctx, "trace buffer %s (%s)",
3472                 (xscale->trace.buffer_enabled) ? "enabled" : "disabled",
3473                 (xscale->trace.buffer_fill > 0) ? "fill" : "wrap");
3474
3475         dcsr_value = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 0, 32);
3476         if (xscale->trace.buffer_fill >= 0)
3477                 xscale_write_dcsr_sw(target, (dcsr_value & 0xfffffffc) | 2);
3478         else
3479                 xscale_write_dcsr_sw(target, dcsr_value & 0xfffffffc);
3480
3481         return ERROR_OK;
3482 }
3483
3484 int xscale_handle_trace_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3485 {
3486         target_t *target;
3487         armv4_5_common_t *armv4_5;
3488         xscale_common_t *xscale;
3489
3490         if (argc < 1)
3491         {
3492                 command_print(cmd_ctx, "usage: xscale trace_image <file> [base address] [type]");
3493                 return ERROR_OK;
3494         }
3495
3496         target = get_current_target(cmd_ctx);
3497
3498         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3499         {
3500                 return ERROR_OK;
3501         }
3502
3503         if (xscale->trace.image)
3504         {
3505                 image_close(xscale->trace.image);
3506                 free(xscale->trace.image);
3507                 command_print(cmd_ctx, "previously loaded image found and closed");
3508         }
3509
3510         xscale->trace.image = malloc(sizeof(image_t));
3511         xscale->trace.image->base_address_set = 0;
3512         xscale->trace.image->start_address_set = 0;
3513
3514         /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
3515         if (argc >= 2)
3516         {
3517                 xscale->trace.image->base_address_set = 1;
3518                 xscale->trace.image->base_address = strtoul(args[1], NULL, 0);
3519         }
3520         else
3521         {
3522                 xscale->trace.image->base_address_set = 0;
3523         }
3524
3525         if (image_open(xscale->trace.image, args[0], (argc >= 3) ? args[2] : NULL) != ERROR_OK)
3526         {
3527                 free(xscale->trace.image);
3528                 xscale->trace.image = NULL;
3529                 return ERROR_OK;
3530         }
3531
3532         return ERROR_OK;
3533 }
3534
3535 int xscale_handle_dump_trace_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3536 {
3537         target_t *target = get_current_target(cmd_ctx);
3538         armv4_5_common_t *armv4_5;
3539         xscale_common_t *xscale;
3540         xscale_trace_data_t *trace_data;
3541         fileio_t file;
3542
3543         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3544         {
3545                 return ERROR_OK;
3546         }
3547
3548         if (target->state != TARGET_HALTED)
3549         {
3550                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
3551                 return ERROR_OK;
3552         }
3553
3554         if (argc < 1)
3555         {
3556                 command_print(cmd_ctx, "usage: xscale dump_trace <file>");
3557                 return ERROR_OK;
3558         }
3559
3560         trace_data = xscale->trace.data;
3561
3562         if (!trace_data)
3563         {
3564                 command_print(cmd_ctx, "no trace data collected");
3565                 return ERROR_OK;
3566         }
3567
3568         if (fileio_open(&file, args[0], FILEIO_WRITE, FILEIO_BINARY) != ERROR_OK)
3569         {
3570                 return ERROR_OK;
3571         }
3572
3573         while (trace_data)
3574         {
3575                 int i;
3576
3577                 fileio_write_u32(&file, trace_data->chkpt0);
3578                 fileio_write_u32(&file, trace_data->chkpt1);
3579                 fileio_write_u32(&file, trace_data->last_instruction);
3580                 fileio_write_u32(&file, trace_data->depth);
3581
3582                 for (i = 0; i < trace_data->depth; i++)
3583                         fileio_write_u32(&file, trace_data->entries[i].data | ((trace_data->entries[i].type & 0xffff) << 16));
3584
3585                 trace_data = trace_data->next;
3586         }
3587
3588         fileio_close(&file);
3589
3590         return ERROR_OK;
3591 }
3592
3593 int xscale_handle_analyze_trace_buffer_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3594 {
3595         target_t *target = get_current_target(cmd_ctx);
3596         armv4_5_common_t *armv4_5;
3597         xscale_common_t *xscale;
3598
3599         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3600         {
3601                 return ERROR_OK;
3602         }
3603
3604         xscale_analyze_trace(target, cmd_ctx);
3605
3606         return ERROR_OK;
3607 }
3608
3609 int xscale_handle_cp15(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
3610 {
3611         target_t *target = get_current_target(cmd_ctx);
3612         armv4_5_common_t *armv4_5;
3613         xscale_common_t *xscale;
3614
3615         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3616         {
3617                 return ERROR_OK;
3618         }
3619
3620         if (target->state != TARGET_HALTED)
3621         {
3622                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
3623                 return ERROR_OK;
3624         }
3625         u32 reg_no = 0;
3626         reg_t *reg = NULL;
3627         if(argc > 0)
3628         {
3629                 reg_no = strtoul(args[0], NULL, 0);
3630                 /*translate from xscale cp15 register no to openocd register*/
3631                 switch(reg_no)
3632                 {
3633                 case 0:
3634                         reg_no = XSCALE_MAINID;
3635                         break;
3636                 case 1:
3637                         reg_no = XSCALE_CTRL;
3638                         break;
3639                 case 2:
3640                         reg_no = XSCALE_TTB;
3641                         break;
3642                 case 3:
3643                         reg_no = XSCALE_DAC;
3644                         break;
3645                 case 5:
3646                         reg_no = XSCALE_FSR;
3647                         break;
3648                 case 6:
3649                         reg_no = XSCALE_FAR;
3650                         break;
3651                 case 13:
3652                         reg_no = XSCALE_PID;
3653                         break;
3654                 case 15:
3655                         reg_no = XSCALE_CPACCESS;
3656                         break;
3657                 default:
3658                         command_print(cmd_ctx, "invalid register number");
3659                         return ERROR_INVALID_ARGUMENTS;
3660                 }
3661                 reg = &xscale->reg_cache->reg_list[reg_no];
3662
3663         }
3664         if(argc == 1)
3665         {
3666                 u32 value;
3667
3668                 /* read cp15 control register */
3669                 xscale_get_reg(reg);
3670                 value = buf_get_u32(reg->value, 0, 32);
3671                 command_print(cmd_ctx, "%s (/%i): 0x%x", reg->name, reg->size, value);
3672         }
3673         else if(argc == 2)
3674         {
3675
3676                 u32 value = strtoul(args[1], NULL, 0);
3677
3678                 /* send CP write request (command 0x41) */
3679                 xscale_send_u32(target, 0x41);
3680
3681                 /* send CP register number */
3682                 xscale_send_u32(target, reg_no);
3683
3684                 /* send CP register value */
3685                 xscale_send_u32(target, value);
3686
3687                 /* execute cpwait to ensure outstanding operations complete */
3688                 xscale_send_u32(target, 0x53);
3689         }
3690         else
3691         {
3692                 command_print(cmd_ctx, "usage: cp15 [register]<, [value]>");
3693         }
3694
3695         return ERROR_OK;
3696 }
3697
3698 int xscale_register_commands(struct command_context_s *cmd_ctx)
3699 {
3700         command_t *xscale_cmd;
3701
3702         xscale_cmd = register_command(cmd_ctx, NULL, "xscale", NULL, COMMAND_ANY, "xscale specific commands");
3703
3704         register_command(cmd_ctx, xscale_cmd, "debug_handler", xscale_handle_debug_handler_command, COMMAND_ANY, "'xscale debug_handler <target#> <address>' command takes two required operands");
3705         register_command(cmd_ctx, xscale_cmd, "cache_clean_address", xscale_handle_cache_clean_address_command, COMMAND_ANY, NULL);
3706
3707         register_command(cmd_ctx, xscale_cmd, "cache_info", xscale_handle_cache_info_command, COMMAND_EXEC, NULL);
3708         register_command(cmd_ctx, xscale_cmd, "mmu", xscale_handle_mmu_command, COMMAND_EXEC, "['enable'|'disable'] the MMU");
3709         register_command(cmd_ctx, xscale_cmd, "icache", xscale_handle_idcache_command, COMMAND_EXEC, "['enable'|'disable'] the ICache");
3710         register_command(cmd_ctx, xscale_cmd, "dcache", xscale_handle_idcache_command, COMMAND_EXEC, "['enable'|'disable'] the DCache");
3711
3712         register_command(cmd_ctx, xscale_cmd, "vector_catch", xscale_handle_idcache_command, COMMAND_EXEC, "<mask> of vectors that should be catched");
3713
3714         register_command(cmd_ctx, xscale_cmd, "trace_buffer", xscale_handle_trace_buffer_command, COMMAND_EXEC, "<enable|disable> ['fill' [n]|'wrap']");
3715
3716         register_command(cmd_ctx, xscale_cmd, "dump_trace", xscale_handle_dump_trace_command, COMMAND_EXEC, "dump content of trace buffer to <file>");
3717         register_command(cmd_ctx, xscale_cmd, "analyze_trace", xscale_handle_analyze_trace_buffer_command, COMMAND_EXEC, "analyze content of trace buffer");
3718         register_command(cmd_ctx, xscale_cmd, "trace_image", xscale_handle_trace_image_command,
3719                 COMMAND_EXEC, "load image from <file> [base address]");
3720
3721         register_command(cmd_ctx, xscale_cmd, "cp15", xscale_handle_cp15, COMMAND_EXEC, "access coproc 15 <register> [value]");
3722
3723         armv4_5_register_commands(cmd_ctx);
3724
3725         return ERROR_OK;
3726 }