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   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 int xscale_prepare_reset_halt(struct target_s *target);
  68
  69 int xscale_set_reg_u32(reg_t *reg, u32 value);
  70
  71 int xscale_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode);
  72 int xscale_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, u32 value);
  73
  74 int xscale_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  75 int xscale_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  76 int xscale_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer);
  77 int xscale_checksum_memory(struct target_s *target, u32 address, u32 count, u32* checksum);
  78
  79 int xscale_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
  80 int xscale_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
  81 int xscale_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
  82 int xscale_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
  83 int xscale_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint);
  84 int xscale_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint);
  85 void xscale_enable_watchpoints(struct target_s *target);
  86 void xscale_enable_breakpoints(struct target_s *target);
  87 static int xscale_virt2phys(struct target_s *target, u32 virtual, u32 *physical);
  88 static int xscale_mmu(struct target_s *target, int *enabled);
  89
  90 int xscale_read_trace(target_t *target);
  91
  92 target_type_t xscale_target =
  93 {
  94         .name = "xscale",
  95
  96         .poll = xscale_poll,
  97         .arch_state = xscale_arch_state,
  98
  99         .target_request_data = NULL,
 100
 101         .halt = xscale_halt,
 102         .resume = xscale_resume,
 103         .step = xscale_step,
 104
 105         .assert_reset = xscale_assert_reset,
 106         .deassert_reset = xscale_deassert_reset,
 107         .soft_reset_halt = xscale_soft_reset_halt,
 108         .prepare_reset_halt = xscale_prepare_reset_halt,
 109
 110         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
 111
 112         .read_memory = xscale_read_memory,
 113         .write_memory = xscale_write_memory,
 114         .bulk_write_memory = xscale_bulk_write_memory,
 115         .checksum_memory = xscale_checksum_memory,
 116
 117         .run_algorithm = armv4_5_run_algorithm,
 118
 119         .add_breakpoint = xscale_add_breakpoint,
 120         .remove_breakpoint = xscale_remove_breakpoint,
 121         .add_watchpoint = xscale_add_watchpoint,
 122         .remove_watchpoint = xscale_remove_watchpoint,
 123
 124         .register_commands = xscale_register_commands,
 125         .target_command = xscale_target_command,
 126         .init_target = xscale_init_target,
 127         .quit = xscale_quit,
 128
 129         .virt2phys = xscale_virt2phys,
 130         .mmu = xscale_mmu
 131 };
 132
 133 char* xscale_reg_list[] =
 134 {
 135         "XSCALE_MAINID",                /* 0 */
 136         "XSCALE_CACHETYPE",
 137         "XSCALE_CTRL",
 138         "XSCALE_AUXCTRL",
 139         "XSCALE_TTB",
 140         "XSCALE_DAC",
 141         "XSCALE_FSR",
 142         "XSCALE_FAR",
 143         "XSCALE_PID",
 144         "XSCALE_CPACCESS",
 145         "XSCALE_IBCR0",                 /* 10 */
 146         "XSCALE_IBCR1",
 147         "XSCALE_DBR0",
 148         "XSCALE_DBR1",
 149         "XSCALE_DBCON",
 150         "XSCALE_TBREG",
 151         "XSCALE_CHKPT0",
 152         "XSCALE_CHKPT1",
 153         "XSCALE_DCSR",
 154         "XSCALE_TX",
 155         "XSCALE_RX",                    /* 20 */
 156         "XSCALE_TXRXCTRL",
 157 };
 158
 159 xscale_reg_t xscale_reg_arch_info[] =
 160 {
 161         {XSCALE_MAINID, NULL},
 162         {XSCALE_CACHETYPE, NULL},
 163         {XSCALE_CTRL, NULL},
 164         {XSCALE_AUXCTRL, NULL},
 165         {XSCALE_TTB, NULL},
 166         {XSCALE_DAC, NULL},
 167         {XSCALE_FSR, NULL},
 168         {XSCALE_FAR, NULL},
 169         {XSCALE_PID, NULL},
 170         {XSCALE_CPACCESS, NULL},
 171         {XSCALE_IBCR0, NULL},
 172         {XSCALE_IBCR1, NULL},
 173         {XSCALE_DBR0, NULL},
 174         {XSCALE_DBR1, NULL},
 175         {XSCALE_DBCON, NULL},
 176         {XSCALE_TBREG, NULL},
 177         {XSCALE_CHKPT0, NULL},
 178         {XSCALE_CHKPT1, NULL},
 179         {XSCALE_DCSR, NULL}, /* DCSR accessed via JTAG or SW */
 180         {-1, NULL}, /* TX accessed via JTAG */
 181         {-1, NULL}, /* RX accessed via JTAG */
 182         {-1, NULL}, /* TXRXCTRL implicit access via JTAG */
 183 };
 184
 185 int xscale_reg_arch_type = -1;
 186
 187 int xscale_get_reg(reg_t *reg);
 188 int xscale_set_reg(reg_t *reg, u8 *buf);
 189
 190 int xscale_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, xscale_common_t **xscale_p)
 191 {
 192         armv4_5_common_t *armv4_5 = target->arch_info;
 193         xscale_common_t *xscale = armv4_5->arch_info;
 194
 195         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 196         {
 197                 ERROR("target isn't an XScale target");
 198                 return -1;
 199         }
 200
 201         if (xscale->common_magic != XSCALE_COMMON_MAGIC)
 202         {
 203                 ERROR("target isn't an XScale target");
 204                 return -1;
 205         }
 206
 207         *armv4_5_p = armv4_5;
 208         *xscale_p = xscale;
 209
 210         return ERROR_OK;
 211 }
 212
 213 int xscale_jtag_set_instr(int chain_pos, u32 new_instr)
 214 {
 215         jtag_device_t *device = jtag_get_device(chain_pos);
 216
 217         if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr)
 218         {
 219                 scan_field_t field;
 220
 221                 field.device = chain_pos;
 222                 field.num_bits = device->ir_length;
 223                 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
 224                 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
 225                 field.out_mask = NULL;
 226                 field.in_value = NULL;
 227                 jtag_set_check_value(&field, device->expected, device->expected_mask, NULL);
 228
 229                 jtag_add_ir_scan(1, &field, -1);
 230
 231                 free(field.out_value);
 232         }
 233
 234         return ERROR_OK;
 235 }
 236
 237 int xscale_read_dcsr(target_t *target)
 238 {
 239         armv4_5_common_t *armv4_5 = target->arch_info;
 240         xscale_common_t *xscale = armv4_5->arch_info;
 241
 242         int retval;
 243
 244         scan_field_t fields[3];
 245         u8 field0 = 0x0;
 246         u8 field0_check_value = 0x2;
 247         u8 field0_check_mask = 0x7;
 248         u8 field2 = 0x0;
 249         u8 field2_check_value = 0x0;
 250         u8 field2_check_mask = 0x1;
 251
 252         jtag_add_end_state(TAP_PD);
 253         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr);
 254
 255         buf_set_u32(&field0, 1, 1, xscale->hold_rst);
 256         buf_set_u32(&field0, 2, 1, xscale->external_debug_break);
 257
 258         fields[0].device = xscale->jtag_info.chain_pos;
 259         fields[0].num_bits = 3;
 260         fields[0].out_value = &field0;
 261         fields[0].out_mask = NULL;
 262         fields[0].in_value = NULL;
 263         jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
 264
 265         fields[1].device = xscale->jtag_info.chain_pos;
 266         fields[1].num_bits = 32;
 267         fields[1].out_value = NULL;
 268         fields[1].out_mask = NULL;
 269         fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
 270         fields[1].in_handler = NULL;
 271         fields[1].in_handler_priv = NULL;
 272         fields[1].in_check_value = NULL;
 273         fields[1].in_check_mask = NULL;
 274
 275         fields[2].device = xscale->jtag_info.chain_pos;
 276         fields[2].num_bits = 1;
 277         fields[2].out_value = &field2;
 278         fields[2].out_mask = NULL;
 279         fields[2].in_value = NULL;
 280         jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
 281
 282         jtag_add_dr_scan(3, fields, -1);
 283
 284         if ((retval = jtag_execute_queue()) != ERROR_OK)
 285         {
 286                 ERROR("JTAG error while reading DCSR");
 287                 return retval;
 288         }
 289
 290         xscale->reg_cache->reg_list[XSCALE_DCSR].dirty = 0;
 291         xscale->reg_cache->reg_list[XSCALE_DCSR].valid = 1;
 292
 293         /* write the register with the value we just read
 294          * on this second pass, only the first bit of field0 is guaranteed to be 0)
 295          */
 296         field0_check_mask = 0x1;
 297         fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
 298         fields[1].in_value = NULL;
 299
 300         jtag_add_end_state(TAP_RTI);
 301
 302         jtag_add_dr_scan(3, fields, -1);
 303
 304         /* DANGER!!! this must be here. It will make sure that the arguments
 305          * to jtag_set_check_value() does not go out of scope! */
 306         return jtag_execute_queue();
 307 }
 308
 309 int xscale_receive(target_t *target, u32 *buffer, int num_words)
 310 {
 311         if (num_words==0)
 312                 return ERROR_INVALID_ARGUMENTS;
 313
 314         int retval=ERROR_OK;
 315         armv4_5_common_t *armv4_5 = target->arch_info;
 316         xscale_common_t *xscale = armv4_5->arch_info;
 317
 318         enum tap_state path[3];
 319         scan_field_t fields[3];
 320
 321         u8 *field0 = malloc(num_words * 1);
 322         u8 field0_check_value = 0x2;
 323         u8 field0_check_mask = 0x6;
 324         u32 *field1 = malloc(num_words * 4);
 325         u8 field2_check_value = 0x0;
 326         u8 field2_check_mask = 0x1;
 327         int words_done = 0;
 328         int words_scheduled = 0;
 329
 330         int i;
 331
 332         path[0] = TAP_SDS;
 333         path[1] = TAP_CD;
 334         path[2] = TAP_SD;
 335
 336         fields[0].device = xscale->jtag_info.chain_pos;
 337         fields[0].num_bits = 3;
 338         fields[0].out_value = NULL;
 339         fields[0].out_mask = NULL;
 340         fields[0].in_value = NULL;
 341         jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
 342
 343         fields[1].device = xscale->jtag_info.chain_pos;
 344         fields[1].num_bits = 32;
 345         fields[1].out_value = NULL;
 346         fields[1].out_mask = NULL;
 347         fields[1].in_value = NULL;
 348         fields[1].in_handler = NULL;
 349         fields[1].in_handler_priv = NULL;
 350         fields[1].in_check_value = NULL;
 351         fields[1].in_check_mask = NULL;
 352
 353
 354
 355         fields[2].device = xscale->jtag_info.chain_pos;
 356         fields[2].num_bits = 1;
 357         fields[2].out_value = NULL;
 358         fields[2].out_mask = NULL;
 359         fields[2].in_value = NULL;
 360         jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
 361
 362         jtag_add_end_state(TAP_RTI);
 363         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgtx);
 364         jtag_add_runtest(1, -1); /* ensures that we're in the TAP_RTI state as the above could be a no-op */
 365
 366         /* repeat until all words have been collected */
 367         int attempts=0;
 368         while (words_done < num_words)
 369         {
 370                 /* schedule reads */
 371                 words_scheduled = 0;
 372                 for (i = words_done; i < num_words; i++)
 373                 {
 374                         fields[0].in_value = &field0[i];
 375                         fields[1].in_handler = buf_to_u32_handler;
 376                         fields[1].in_handler_priv = (u8*)&field1[i];
 377
 378                         jtag_add_pathmove(3, path);
 379                         jtag_add_dr_scan(3, fields, TAP_RTI);
 380                         words_scheduled++;
 381                 }
 382
 383                 if ((retval = jtag_execute_queue()) != ERROR_OK)
 384                 {
 385                         ERROR("JTAG error while receiving data from debug handler");
 386                         break;
 387                 }
 388
 389                 /* examine results */
 390                 for (i = words_done; i < num_words; i++)
 391                 {
 392                         if (!(field0[0] & 1))
 393                         {
 394                                 /* move backwards if necessary */
 395                                 int j;
 396                                 for (j = i; j < num_words - 1; j++)
 397                                 {
 398                                         field0[j] = field0[j+1];
 399                                         field1[j] = field1[j+1];
 400                                 }
 401                                 words_scheduled--;
 402                         }
 403                 }
 404                 if (words_scheduled==0)
 405                 {
 406                         if (attempts++==1000)
 407                         {
 408                                 ERROR("Failed to receiving data from debug handler after 1000 attempts");
 409                                 retval=ERROR_TARGET_TIMEOUT;
 410                                 break;
 411                         }
 412                 }
 413
 414                 words_done += words_scheduled;
 415         }
 416
 417         for (i = 0; i < num_words; i++)
 418                 *(buffer++) = buf_get_u32((u8*)&field1[i], 0, 32);
 419
 420         free(field1);
 421
 422         return retval;
 423 }
 424
 425 int xscale_read_tx(target_t *target, int consume)
 426 {
 427         armv4_5_common_t *armv4_5 = target->arch_info;
 428         xscale_common_t *xscale = armv4_5->arch_info;
 429         enum tap_state path[3];
 430         enum tap_state noconsume_path[9];
 431
 432         int retval;
 433         struct timeval timeout, now;
 434
 435         scan_field_t fields[3];
 436         u8 field0_in = 0x0;
 437         u8 field0_check_value = 0x2;
 438         u8 field0_check_mask = 0x6;
 439         u8 field2_check_value = 0x0;
 440         u8 field2_check_mask = 0x1;
 441
 442         jtag_add_end_state(TAP_RTI);
 443
 444         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgtx);
 445
 446         path[0] = TAP_SDS;
 447         path[1] = TAP_CD;
 448         path[2] = TAP_SD;
 449
 450         noconsume_path[0] = TAP_SDS;
 451         noconsume_path[1] = TAP_CD;
 452         noconsume_path[2] = TAP_E1D;
 453         noconsume_path[3] = TAP_PD;
 454         noconsume_path[4] = TAP_E2D;
 455         noconsume_path[5] = TAP_UD;
 456         noconsume_path[6] = TAP_SDS;
 457         noconsume_path[7] = TAP_CD;
 458         noconsume_path[8] = TAP_SD;
 459
 460         fields[0].device = xscale->jtag_info.chain_pos;
 461         fields[0].num_bits = 3;
 462         fields[0].out_value = NULL;
 463         fields[0].out_mask = NULL;
 464         fields[0].in_value = &field0_in;
 465         jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
 466
 467         fields[1].device = xscale->jtag_info.chain_pos;
 468         fields[1].num_bits = 32;
 469         fields[1].out_value = NULL;
 470         fields[1].out_mask = NULL;
 471         fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_TX].value;
 472         fields[1].in_handler = NULL;
 473         fields[1].in_handler_priv = NULL;
 474         fields[1].in_check_value = NULL;
 475         fields[1].in_check_mask = NULL;
 476
 477
 478
 479         fields[2].device = xscale->jtag_info.chain_pos;
 480         fields[2].num_bits = 1;
 481         fields[2].out_value = NULL;
 482         fields[2].out_mask = NULL;
 483         fields[2].in_value = NULL;
 484         jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
 485
 486         gettimeofday(&timeout, NULL);
 487         timeval_add_time(&timeout, 5, 0);
 488
 489         for (;;)
 490         {
 491                 /* if we want to consume the register content (i.e. clear TX_READY),
 492                  * we have to go straight from Capture-DR to Shift-DR
 493                  * otherwise, we go from Capture-DR to Exit1-DR to Pause-DR
 494                 */
 495                 if (consume)
 496                         jtag_add_pathmove(3, path);
 497                 else
 498                         jtag_add_pathmove(sizeof(noconsume_path)/sizeof(*noconsume_path), noconsume_path);
 499
 500                 jtag_add_dr_scan(3, fields, TAP_RTI);
 501
 502                 if ((retval = jtag_execute_queue()) != ERROR_OK)
 503                 {
 504                         ERROR("JTAG error while reading TX");
 505                         return ERROR_TARGET_TIMEOUT;
 506                 }
 507
 508                 gettimeofday(&now, NULL);
 509                 if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec)&& (now.tv_usec > timeout.tv_usec)))
 510                 {
 511                         ERROR("time out reading TX register");
 512                         return ERROR_TARGET_TIMEOUT;
 513                 }
 514                 if (!((!(field0_in & 1)) && consume))
 515                 {
 516                         break;
 517                 }
 518                 usleep(500*1000); /* avoid flooding the logs */
 519         }
 520
 521         if (!(field0_in & 1))
 522                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 523
 524         return ERROR_OK;
 525 }
 526
 527 int xscale_write_rx(target_t *target)
 528 {
 529         armv4_5_common_t *armv4_5 = target->arch_info;
 530         xscale_common_t *xscale = armv4_5->arch_info;
 531
 532         int retval;
 533         struct timeval timeout, now;
 534
 535         scan_field_t fields[3];
 536         u8 field0_out = 0x0;
 537         u8 field0_in = 0x0;
 538         u8 field0_check_value = 0x2;
 539         u8 field0_check_mask = 0x6;
 540         u8 field2 = 0x0;
 541         u8 field2_check_value = 0x0;
 542         u8 field2_check_mask = 0x1;
 543
 544         jtag_add_end_state(TAP_RTI);
 545
 546         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgrx);
 547
 548         fields[0].device = xscale->jtag_info.chain_pos;
 549         fields[0].num_bits = 3;
 550         fields[0].out_value = &field0_out;
 551         fields[0].out_mask = NULL;
 552         fields[0].in_value = &field0_in;
 553         jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
 554
 555         fields[1].device = xscale->jtag_info.chain_pos;
 556         fields[1].num_bits = 32;
 557         fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_RX].value;
 558         fields[1].out_mask = NULL;
 559         fields[1].in_value = NULL;
 560         fields[1].in_handler = NULL;
 561         fields[1].in_handler_priv = NULL;
 562         fields[1].in_check_value = NULL;
 563         fields[1].in_check_mask = NULL;
 564
 565
 566
 567         fields[2].device = xscale->jtag_info.chain_pos;
 568         fields[2].num_bits = 1;
 569         fields[2].out_value = &field2;
 570         fields[2].out_mask = NULL;
 571         fields[2].in_value = NULL;
 572         jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
 573
 574         gettimeofday(&timeout, NULL);
 575         timeval_add_time(&timeout, 5, 0);
 576
 577         /* poll until rx_read is low */
 578         DEBUG("polling RX");
 579         for (;;)
 580         {
 581                 jtag_add_dr_scan(3, fields, TAP_RTI);
 582
 583                 if ((retval = jtag_execute_queue()) != ERROR_OK)
 584                 {
 585                         ERROR("JTAG error while writing RX");
 586                         return retval;
 587                 }
 588
 589                 gettimeofday(&now, NULL);
 590                 if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec)&& (now.tv_usec > timeout.tv_usec)))
 591                 {
 592                         ERROR("time out writing RX register");
 593                         return ERROR_TARGET_TIMEOUT;
 594                 }
 595                 if (!(field0_in & 1))
 596                         break;
 597                 usleep(500*1000); /* wait 500ms to avoid flooding the logs */
 598         }
 599
 600         /* set rx_valid */
 601         field2 = 0x1;
 602         jtag_add_dr_scan(3, fields, TAP_RTI);
 603
 604         if ((retval = jtag_execute_queue()) != ERROR_OK)
 605         {
 606                 ERROR("JTAG error while writing RX");
 607                 return retval;
 608         }
 609
 610         return ERROR_OK;
 611 }
 612
 613 /* send count elements of size byte to the debug handler */
 614 int xscale_send(target_t *target, u8 *buffer, int count, int size)
 615 {
 616         armv4_5_common_t *armv4_5 = target->arch_info;
 617         xscale_common_t *xscale = armv4_5->arch_info;
 618
 619         int retval;
 620
 621         int done_count = 0;
 622         u8 output[4] = {0, 0, 0, 0};
 623
 624         scan_field_t fields[3];
 625         u8 field0_out = 0x0;
 626         u8 field0_check_value = 0x2;
 627         u8 field0_check_mask = 0x6;
 628         u8 field2 = 0x1;
 629         u8 field2_check_value = 0x0;
 630         u8 field2_check_mask = 0x1;
 631
 632         jtag_add_end_state(TAP_RTI);
 633
 634         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dbgrx);
 635
 636         fields[0].device = xscale->jtag_info.chain_pos;
 637         fields[0].num_bits = 3;
 638         fields[0].out_value = &field0_out;
 639         fields[0].out_mask = NULL;
 640         fields[0].in_handler = NULL;
 641         fields[0].in_value = NULL;
 642         if (!xscale->fast_memory_access)
 643         {
 644                 jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
 645         }
 646
 647         fields[1].device = xscale->jtag_info.chain_pos;
 648         fields[1].num_bits = 32;
 649         fields[1].out_value = output;
 650         fields[1].out_mask = NULL;
 651         fields[1].in_value = NULL;
 652         fields[1].in_handler = NULL;
 653         fields[1].in_handler_priv = NULL;
 654         fields[1].in_check_value = NULL;
 655         fields[1].in_check_mask = NULL;
 656
 657
 658
 659         fields[2].device = xscale->jtag_info.chain_pos;
 660         fields[2].num_bits = 1;
 661         fields[2].out_value = &field2;
 662         fields[2].out_mask = NULL;
 663         fields[2].in_value = NULL;
 664         fields[2].in_handler = NULL;
 665         if (!xscale->fast_memory_access)
 666         {
 667                 jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
 668         }
 669
 670         if (size==4)
 671         {
 672                 int endianness = target->endianness;
 673                 while (done_count++ < count)
 674                 {
 675                         if (endianness == TARGET_LITTLE_ENDIAN)
 676                         {
 677                                 output[0]=buffer[0];
 678                                 output[1]=buffer[1];
 679                                 output[2]=buffer[2];
 680                                 output[3]=buffer[3];
 681                         } else
 682                         {
 683                                 output[0]=buffer[3];
 684                                 output[1]=buffer[2];
 685                                 output[2]=buffer[1];
 686                                 output[3]=buffer[0];
 687                         }
 688                         jtag_add_dr_scan(3, fields, TAP_RTI);
 689                         buffer += size;
 690                 }
 691
 692         } else
 693         {
 694                 while (done_count++ < count)
 695                 {
 696                         /* extract sized element from target-endian buffer, and put it
 697                          * into little-endian output buffer
 698                          */
 699                         switch (size)
 700                         {
 701                                 case 2:
 702                                         buf_set_u32(output, 0, 32, target_buffer_get_u16(target, buffer));
 703                                         break;
 704                                 case 1:
 705                                         output[0] = *buffer;
 706                                         break;
 707                                 default:
 708                                         ERROR("BUG: size neither 4, 2 nor 1");
 709                                         exit(-1);
 710                         }
 711
 712                         jtag_add_dr_scan(3, fields, TAP_RTI);
 713                         buffer += size;
 714                 }
 715
 716         }
 717
 718         if ((retval = jtag_execute_queue()) != ERROR_OK)
 719         {
 720                 ERROR("JTAG error while sending data to debug handler");
 721                 return retval;
 722         }
 723
 724         return ERROR_OK;
 725 }
 726
 727 int xscale_send_u32(target_t *target, u32 value)
 728 {
 729         armv4_5_common_t *armv4_5 = target->arch_info;
 730         xscale_common_t *xscale = armv4_5->arch_info;
 731
 732         buf_set_u32(xscale->reg_cache->reg_list[XSCALE_RX].value, 0, 32, value);
 733         return xscale_write_rx(target);
 734 }
 735
 736 int xscale_write_dcsr(target_t *target, int hold_rst, int ext_dbg_brk)
 737 {
 738         armv4_5_common_t *armv4_5 = target->arch_info;
 739         xscale_common_t *xscale = armv4_5->arch_info;
 740
 741         int retval;
 742
 743         scan_field_t fields[3];
 744         u8 field0 = 0x0;
 745         u8 field0_check_value = 0x2;
 746         u8 field0_check_mask = 0x7;
 747         u8 field2 = 0x0;
 748         u8 field2_check_value = 0x0;
 749         u8 field2_check_mask = 0x1;
 750
 751         if (hold_rst != -1)
 752                 xscale->hold_rst = hold_rst;
 753
 754         if (ext_dbg_brk != -1)
 755                 xscale->external_debug_break = ext_dbg_brk;
 756
 757         jtag_add_end_state(TAP_RTI);
 758         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr);
 759
 760         buf_set_u32(&field0, 1, 1, xscale->hold_rst);
 761         buf_set_u32(&field0, 2, 1, xscale->external_debug_break);
 762
 763         fields[0].device = xscale->jtag_info.chain_pos;
 764         fields[0].num_bits = 3;
 765         fields[0].out_value = &field0;
 766         fields[0].out_mask = NULL;
 767         fields[0].in_value = NULL;
 768         jtag_set_check_value(fields+0, &field0_check_value, &field0_check_mask, NULL);
 769
 770         fields[1].device = xscale->jtag_info.chain_pos;
 771         fields[1].num_bits = 32;
 772         fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
 773         fields[1].out_mask = NULL;
 774         fields[1].in_value = NULL;
 775         fields[1].in_handler = NULL;
 776         fields[1].in_handler_priv = NULL;
 777         fields[1].in_check_value = NULL;
 778         fields[1].in_check_mask = NULL;
 779
 780
 781
 782         fields[2].device = xscale->jtag_info.chain_pos;
 783         fields[2].num_bits = 1;
 784         fields[2].out_value = &field2;
 785         fields[2].out_mask = NULL;
 786         fields[2].in_value = NULL;
 787         jtag_set_check_value(fields+2, &field2_check_value, &field2_check_mask, NULL);
 788
 789         jtag_add_dr_scan(3, fields, -1);
 790
 791         if ((retval = jtag_execute_queue()) != ERROR_OK)
 792         {
 793                 ERROR("JTAG error while writing DCSR");
 794                 return retval;
 795         }
 796
 797         xscale->reg_cache->reg_list[XSCALE_DCSR].dirty = 0;
 798         xscale->reg_cache->reg_list[XSCALE_DCSR].valid = 1;
 799
 800         return ERROR_OK;
 801 }
 802
 803 /* parity of the number of bits 0 if even; 1 if odd. for 32 bit words */
 804 unsigned int parity (unsigned int v)
 805 {
 806         unsigned int ov = v;
 807         v ^= v >> 16;
 808         v ^= v >> 8;
 809         v ^= v >> 4;
 810         v &= 0xf;
 811         DEBUG("parity of 0x%x is %i", ov, (0x6996 >> v) & 1);
 812         return (0x6996 >> v) & 1;
 813 }
 814
 815 int xscale_load_ic(target_t *target, int mini, u32 va, u32 buffer[8])
 816 {
 817         armv4_5_common_t *armv4_5 = target->arch_info;
 818         xscale_common_t *xscale = armv4_5->arch_info;
 819         u8 packet[4];
 820         u8 cmd;
 821         int word;
 822
 823         scan_field_t fields[2];
 824
 825         DEBUG("loading miniIC at 0x%8.8x", va);
 826
 827         jtag_add_end_state(TAP_RTI);
 828         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.ldic); /* LDIC */
 829
 830         /* CMD is b010 for Main IC and b011 for Mini IC */
 831         if (mini)
 832                 buf_set_u32(&cmd, 0, 3, 0x3);
 833         else
 834                 buf_set_u32(&cmd, 0, 3, 0x2);
 835
 836         buf_set_u32(&cmd, 3, 3, 0x0);
 837
 838         /* virtual address of desired cache line */
 839         buf_set_u32(packet, 0, 27, va >> 5);
 840
 841         fields[0].device = xscale->jtag_info.chain_pos;
 842         fields[0].num_bits = 6;
 843         fields[0].out_value = &cmd;
 844         fields[0].out_mask = NULL;
 845         fields[0].in_value = NULL;
 846         fields[0].in_check_value = NULL;
 847         fields[0].in_check_mask = NULL;
 848         fields[0].in_handler = NULL;
 849         fields[0].in_handler_priv = NULL;
 850
 851         fields[1].device = xscale->jtag_info.chain_pos;
 852         fields[1].num_bits = 27;
 853         fields[1].out_value = packet;
 854         fields[1].out_mask = NULL;
 855         fields[1].in_value = NULL;
 856         fields[1].in_check_value = NULL;
 857         fields[1].in_check_mask = NULL;
 858         fields[1].in_handler = NULL;
 859         fields[1].in_handler_priv = NULL;
 860
 861         jtag_add_dr_scan(2, fields, -1);
 862
 863         fields[0].num_bits = 32;
 864         fields[0].out_value = packet;
 865
 866         fields[1].num_bits = 1;
 867         fields[1].out_value = &cmd;
 868
 869         for (word = 0; word < 8; word++)
 870         {
 871                 buf_set_u32(packet, 0, 32, buffer[word]);
 872                 cmd = parity(*((u32*)packet));
 873                 jtag_add_dr_scan(2, fields, -1);
 874         }
 875
 876         jtag_execute_queue();
 877
 878         return ERROR_OK;
 879 }
 880
 881 int xscale_invalidate_ic_line(target_t *target, u32 va)
 882 {
 883         armv4_5_common_t *armv4_5 = target->arch_info;
 884         xscale_common_t *xscale = armv4_5->arch_info;
 885         u8 packet[4];
 886         u8 cmd;
 887
 888         scan_field_t fields[2];
 889
 890         jtag_add_end_state(TAP_RTI);
 891         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.ldic); /* LDIC */
 892
 893         /* CMD for invalidate IC line b000, bits [6:4] b000 */
 894         buf_set_u32(&cmd, 0, 6, 0x0);
 895
 896         /* virtual address of desired cache line */
 897         buf_set_u32(packet, 0, 27, va >> 5);
 898
 899         fields[0].device = xscale->jtag_info.chain_pos;
 900         fields[0].num_bits = 6;
 901         fields[0].out_value = &cmd;
 902         fields[0].out_mask = NULL;
 903         fields[0].in_value = NULL;
 904         fields[0].in_check_value = NULL;
 905         fields[0].in_check_mask = NULL;
 906         fields[0].in_handler = NULL;
 907         fields[0].in_handler_priv = NULL;
 908
 909         fields[1].device = xscale->jtag_info.chain_pos;
 910         fields[1].num_bits = 27;
 911         fields[1].out_value = packet;
 912         fields[1].out_mask = NULL;
 913         fields[1].in_value = NULL;
 914         fields[1].in_check_value = NULL;
 915         fields[1].in_check_mask = NULL;
 916         fields[1].in_handler = NULL;
 917         fields[1].in_handler_priv = NULL;
 918
 919         jtag_add_dr_scan(2, fields, -1);
 920
 921         return ERROR_OK;
 922 }
 923
 924 int xscale_update_vectors(target_t *target)
 925 {
 926         armv4_5_common_t *armv4_5 = target->arch_info;
 927         xscale_common_t *xscale = armv4_5->arch_info;
 928         int i;
 929         int retval;
 930
 931         u32 low_reset_branch, high_reset_branch;
 932
 933         for (i = 1; i < 8; i++)
 934         {
 935                 /* if there's a static vector specified for this exception, override */
 936                 if (xscale->static_high_vectors_set & (1 << i))
 937                 {
 938                         xscale->high_vectors[i] = xscale->static_high_vectors[i];
 939                 }
 940                 else
 941                 {
 942                         retval=target_read_u32(target, 0xffff0000 + 4*i, &xscale->high_vectors[i]);
 943                         if (retval == ERROR_TARGET_TIMEOUT)
 944                                 return retval;
 945                         if (retval!=ERROR_OK)
 946                         {
 947                                 /* Some of these reads will fail as part of normal execution */
 948                                 xscale->high_vectors[i] = ARMV4_5_B(0xfffffe, 0);
 949                         }
 950                 }
 951         }
 952
 953         for (i = 1; i < 8; i++)
 954         {
 955                 if (xscale->static_low_vectors_set & (1 << i))
 956                 {
 957                         xscale->low_vectors[i] = xscale->static_low_vectors[i];
 958                 }
 959                 else
 960                 {
 961                         retval=target_read_u32(target, 0x0 + 4*i, &xscale->low_vectors[i]);
 962                         if (retval == ERROR_TARGET_TIMEOUT)
 963                                 return retval;
 964                         if (retval!=ERROR_OK)
 965                         {
 966                                 /* Some of these reads will fail as part of normal execution */
 967                                 xscale->low_vectors[i] = ARMV4_5_B(0xfffffe, 0);
 968                         }
 969                 }
 970         }
 971
 972         /* calculate branches to debug handler */
 973         low_reset_branch = (xscale->handler_address + 0x20 - 0x0 - 0x8) >> 2;
 974         high_reset_branch = (xscale->handler_address + 0x20 - 0xffff0000 - 0x8) >> 2;
 975
 976         xscale->low_vectors[0] = ARMV4_5_B((low_reset_branch & 0xffffff), 0);
 977         xscale->high_vectors[0] = ARMV4_5_B((high_reset_branch & 0xffffff), 0);
 978
 979         /* invalidate and load exception vectors in mini i-cache */
 980         xscale_invalidate_ic_line(target, 0x0);
 981         xscale_invalidate_ic_line(target, 0xffff0000);
 982
 983         xscale_load_ic(target, 1, 0x0, xscale->low_vectors);
 984         xscale_load_ic(target, 1, 0xffff0000, xscale->high_vectors);
 985
 986         return ERROR_OK;
 987 }
 988
 989 int xscale_arch_state(struct target_s *target)
 990 {
 991         armv4_5_common_t *armv4_5 = target->arch_info;
 992         xscale_common_t *xscale = armv4_5->arch_info;
 993
 994         char *state[] =
 995         {
 996                 "disabled", "enabled"
 997         };
 998
 999         char *arch_dbg_reason[] =
1000         {
1001                 "", "\n(processor reset)", "\n(trace buffer full)"
1002         };
1003
1004         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
1005         {
1006                 ERROR("BUG: called for a non-ARMv4/5 target");
1007                 exit(-1);
1008         }
1009
1010         USER("target halted in %s state due to %s, current mode: %s\n"
1011                         "cpsr: 0x%8.8x pc: 0x%8.8x\n"
1012                         "MMU: %s, D-Cache: %s, I-Cache: %s"
1013                         "%s",
1014                          armv4_5_state_strings[armv4_5->core_state],
1015                          target_debug_reason_strings[target->debug_reason],
1016                          armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
1017                          buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
1018                          buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32),
1019                          state[xscale->armv4_5_mmu.mmu_enabled],
1020                          state[xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
1021                          state[xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled],
1022                          arch_dbg_reason[xscale->arch_debug_reason]);
1023
1024         return ERROR_OK;
1025 }
1026
1027 int xscale_poll(target_t *target)
1028 {
1029         int retval=ERROR_OK;
1030         armv4_5_common_t *armv4_5 = target->arch_info;
1031         xscale_common_t *xscale = armv4_5->arch_info;
1032
1033         if ((target->state == TARGET_RUNNING) || (target->state == TARGET_DEBUG_RUNNING))
1034         {
1035                 enum target_state previous_state = target->state;
1036                 if ((retval = xscale_read_tx(target, 0)) == ERROR_OK)
1037                 {
1038
1039                         /* there's data to read from the tx register, we entered debug state */
1040                         xscale->handler_running = 1;
1041
1042                         target->state = TARGET_HALTED;
1043
1044                         /* process debug entry, fetching current mode regs */
1045                         retval = xscale_debug_entry(target);
1046                 }
1047                 else if (retval != ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
1048                 {
1049                         USER("error while polling TX register, reset CPU");
1050                         /* here we "lie" so GDB won't get stuck and a reset can be perfomed */
1051                         target->state = TARGET_HALTED;
1052                 }
1053
1054                 /* debug_entry could have overwritten target state (i.e. immediate resume)
1055                  * don't signal event handlers in that case
1056                  */
1057                 if (target->state != TARGET_HALTED)
1058                         return ERROR_OK;
1059
1060                 /* if target was running, signal that we halted
1061                  * otherwise we reentered from debug execution */
1062                 if (previous_state == TARGET_RUNNING)
1063                         target_call_event_callbacks(target, TARGET_EVENT_HALTED);
1064                 else
1065                         target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
1066         }
1067
1068         return retval;
1069 }
1070
1071 int xscale_debug_entry(target_t *target)
1072 {
1073         armv4_5_common_t *armv4_5 = target->arch_info;
1074         xscale_common_t *xscale = armv4_5->arch_info;
1075         u32 pc;
1076         u32 buffer[10];
1077         int i;
1078         int retval;
1079
1080         u32 moe;
1081
1082         /* clear external dbg break (will be written on next DCSR read) */
1083         xscale->external_debug_break = 0;
1084         if ((retval=xscale_read_dcsr(target))!=ERROR_OK)
1085                 return retval;
1086
1087         /* get r0, pc, r1 to r7 and cpsr */
1088         if ((retval=xscale_receive(target, buffer, 10))!=ERROR_OK)
1089                 return retval;
1090
1091         /* move r0 from buffer to register cache */
1092         buf_set_u32(armv4_5->core_cache->reg_list[0].value, 0, 32, buffer[0]);
1093         armv4_5->core_cache->reg_list[15].dirty = 1;
1094         armv4_5->core_cache->reg_list[15].valid = 1;
1095         DEBUG("r0: 0x%8.8x", buffer[0]);
1096
1097         /* move pc from buffer to register cache */
1098         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, buffer[1]);
1099         armv4_5->core_cache->reg_list[15].dirty = 1;
1100         armv4_5->core_cache->reg_list[15].valid = 1;
1101         DEBUG("pc: 0x%8.8x", buffer[1]);
1102
1103         /* move data from buffer to register cache */
1104         for (i = 1; i <= 7; i++)
1105         {
1106                 buf_set_u32(armv4_5->core_cache->reg_list[i].value, 0, 32, buffer[1 + i]);
1107                 armv4_5->core_cache->reg_list[i].dirty = 1;
1108                 armv4_5->core_cache->reg_list[i].valid = 1;
1109                 DEBUG("r%i: 0x%8.8x", i, buffer[i + 1]);
1110         }
1111
1112         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, buffer[9]);
1113         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
1114         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
1115         DEBUG("cpsr: 0x%8.8x", buffer[9]);
1116
1117         armv4_5->core_mode = buffer[9] & 0x1f;
1118         if (armv4_5_mode_to_number(armv4_5->core_mode) == -1)
1119         {
1120                 target->state = TARGET_UNKNOWN;
1121                 ERROR("cpsr contains invalid mode value - communication failure");
1122                 return ERROR_TARGET_FAILURE;
1123         }
1124         DEBUG("target entered debug state in %s mode", armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)]);
1125
1126         if (buffer[9] & 0x20)
1127                 armv4_5->core_state = ARMV4_5_STATE_THUMB;
1128         else
1129                 armv4_5->core_state = ARMV4_5_STATE_ARM;
1130
1131         /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
1132         if ((armv4_5->core_mode != ARMV4_5_MODE_USR) && (armv4_5->core_mode != ARMV4_5_MODE_SYS))
1133         {
1134                 xscale_receive(target, buffer, 8);
1135                 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, buffer[7]);
1136                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).dirty = 0;
1137                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).valid = 1;
1138         }
1139         else
1140         {
1141                 /* r8 to r14, but no spsr */
1142                 xscale_receive(target, buffer, 7);
1143         }
1144
1145         /* move data from buffer to register cache */
1146         for (i = 8; i <= 14; i++)
1147         {
1148                 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).value, 0, 32, buffer[i - 8]);
1149                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).dirty = 0;
1150                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).valid = 1;
1151         }
1152
1153         /* examine debug reason */
1154         xscale_read_dcsr(target);
1155         moe = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 2, 3);
1156
1157         /* stored PC (for calculating fixup) */
1158         pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
1159
1160         switch (moe)
1161         {
1162                 case 0x0: /* Processor reset */
1163                         target->debug_reason = DBG_REASON_DBGRQ;
1164                         xscale->arch_debug_reason = XSCALE_DBG_REASON_RESET;
1165                         pc -= 4;
1166                         break;
1167                 case 0x1: /* Instruction breakpoint hit */
1168                         target->debug_reason = DBG_REASON_BREAKPOINT;
1169                         xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
1170                         pc -= 4;
1171                         break;
1172                 case 0x2: /* Data breakpoint hit */
1173                         target->debug_reason = DBG_REASON_WATCHPOINT;
1174                         xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
1175                         pc -= 4;
1176                         break;
1177                 case 0x3: /* BKPT instruction executed */
1178                         target->debug_reason = DBG_REASON_BREAKPOINT;
1179                         xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
1180                         pc -= 4;
1181                         break;
1182                 case 0x4: /* Ext. debug event */
1183                         target->debug_reason = DBG_REASON_DBGRQ;
1184                         xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
1185                         pc -= 4;
1186                         break;
1187                 case 0x5: /* Vector trap occured */
1188                         target->debug_reason = DBG_REASON_BREAKPOINT;
1189                         xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
1190                         pc -= 4;
1191                         break;
1192                 case 0x6: /* Trace buffer full break */
1193                         target->debug_reason = DBG_REASON_DBGRQ;
1194                         xscale->arch_debug_reason = XSCALE_DBG_REASON_TB_FULL;
1195                         pc -= 4;
1196                         break;
1197                 case 0x7: /* Reserved */
1198                 default:
1199                         ERROR("Method of Entry is 'Reserved'");
1200                         exit(-1);
1201                         break;
1202         }
1203
1204         /* apply PC fixup */
1205         buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, pc);
1206
1207         /* on the first debug entry, identify cache type */
1208         if (xscale->armv4_5_mmu.armv4_5_cache.ctype == -1)
1209         {
1210                 u32 cache_type_reg;
1211
1212                 /* read cp15 cache type register */
1213                 xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CACHETYPE]);
1214                 cache_type_reg = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CACHETYPE].value, 0, 32);
1215
1216                 armv4_5_identify_cache(cache_type_reg, &xscale->armv4_5_mmu.armv4_5_cache);
1217         }
1218
1219         /* examine MMU and Cache settings */
1220         /* read cp15 control register */
1221         xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
1222         xscale->cp15_control_reg = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
1223         xscale->armv4_5_mmu.mmu_enabled = (xscale->cp15_control_reg & 0x1U) ? 1 : 0;
1224         xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = (xscale->cp15_control_reg & 0x4U) ? 1 : 0;
1225         xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = (xscale->cp15_control_reg & 0x1000U) ? 1 : 0;
1226
1227         /* tracing enabled, read collected trace data */
1228         if (xscale->trace.buffer_enabled)
1229         {
1230                 xscale_read_trace(target);
1231                 xscale->trace.buffer_fill--;
1232
1233                 /* resume if we're still collecting trace data */
1234                 if ((xscale->arch_debug_reason == XSCALE_DBG_REASON_TB_FULL)
1235                         && (xscale->trace.buffer_fill > 0))
1236                 {
1237                         xscale_resume(target, 1, 0x0, 1, 0);
1238                 }
1239                 else
1240                 {
1241                         xscale->trace.buffer_enabled = 0;
1242                 }
1243         }
1244
1245         return ERROR_OK;
1246 }
1247
1248 int xscale_halt(target_t *target)
1249 {
1250         armv4_5_common_t *armv4_5 = target->arch_info;
1251         xscale_common_t *xscale = armv4_5->arch_info;
1252
1253         DEBUG("target->state: %s", target_state_strings[target->state]);
1254
1255         if (target->state == TARGET_HALTED)
1256         {
1257                 WARNING("target was already halted");
1258                 return ERROR_OK;
1259         }
1260         else if (target->state == TARGET_UNKNOWN)
1261         {
1262                 /* this must not happen for a xscale target */
1263                 ERROR("target was in unknown state when halt was requested");
1264                 return ERROR_TARGET_INVALID;
1265         }
1266         else if (target->state == TARGET_RESET)
1267         {
1268                 DEBUG("target->state == TARGET_RESET");
1269         }
1270         else
1271         {
1272                 /* assert external dbg break */
1273                 xscale->external_debug_break = 1;
1274                 xscale_read_dcsr(target);
1275
1276                 target->debug_reason = DBG_REASON_DBGRQ;
1277         }
1278
1279         return ERROR_OK;
1280 }
1281
1282 int xscale_enable_single_step(struct target_s *target, u32 next_pc)
1283 {
1284         armv4_5_common_t *armv4_5 = target->arch_info;
1285         xscale_common_t *xscale= armv4_5->arch_info;
1286         reg_t *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0];
1287
1288         if (xscale->ibcr0_used)
1289         {
1290                 breakpoint_t *ibcr0_bp = breakpoint_find(target, buf_get_u32(ibcr0->value, 0, 32) & 0xfffffffe);
1291
1292                 if (ibcr0_bp)
1293                 {
1294                         xscale_unset_breakpoint(target, ibcr0_bp);
1295                 }
1296                 else
1297                 {
1298                         ERROR("BUG: xscale->ibcr0_used is set, but no breakpoint with that address found");
1299                         exit(-1);
1300                 }
1301         }
1302
1303         xscale_set_reg_u32(ibcr0, next_pc | 0x1);
1304
1305         return ERROR_OK;
1306 }
1307
1308 int xscale_disable_single_step(struct target_s *target)
1309 {
1310         armv4_5_common_t *armv4_5 = target->arch_info;
1311         xscale_common_t *xscale= armv4_5->arch_info;
1312         reg_t *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0];
1313
1314         xscale_set_reg_u32(ibcr0, 0x0);
1315
1316         return ERROR_OK;
1317 }
1318
1319 int xscale_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution)
1320 {
1321         armv4_5_common_t *armv4_5 = target->arch_info;
1322         xscale_common_t *xscale= armv4_5->arch_info;
1323         breakpoint_t *breakpoint = target->breakpoints;
1324
1325         u32 current_pc;
1326
1327         int retval;
1328         int i;
1329
1330         DEBUG("-");
1331
1332         if (target->state != TARGET_HALTED)
1333         {
1334                 WARNING("target not halted");
1335                 return ERROR_TARGET_NOT_HALTED;
1336         }
1337
1338         if (!debug_execution)
1339         {
1340                 target_free_all_working_areas(target);
1341         }
1342
1343         /* update vector tables */
1344         if ((retval=xscale_update_vectors(target))!=ERROR_OK)
1345                 return retval;
1346
1347         /* current = 1: continue on current pc, otherwise continue at <address> */
1348         if (!current)
1349                 buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
1350
1351         current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
1352
1353         /* if we're at the reset vector, we have to simulate the branch */
1354         if (current_pc == 0x0)
1355         {
1356                 arm_simulate_step(target, NULL);
1357                 current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
1358         }
1359
1360         /* the front-end may request us not to handle breakpoints */
1361         if (handle_breakpoints)
1362         {
1363                 if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
1364                 {
1365                         u32 next_pc;
1366
1367                         /* there's a breakpoint at the current PC, we have to step over it */
1368                         DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address);
1369                         xscale_unset_breakpoint(target, breakpoint);
1370
1371                         /* calculate PC of next instruction */
1372                         if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK)
1373                         {
1374                                 u32 current_opcode;
1375                                 target_read_u32(target, current_pc, &current_opcode);
1376                                 ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8x", current_opcode);
1377                         }
1378
1379                         DEBUG("enable single-step");
1380                         xscale_enable_single_step(target, next_pc);
1381
1382                         /* restore banked registers */
1383                         xscale_restore_context(target);
1384
1385                         /* send resume request (command 0x30 or 0x31)
1386                          * clean the trace buffer if it is to be enabled (0x62) */
1387                         if (xscale->trace.buffer_enabled)
1388                         {
1389                                 xscale_send_u32(target, 0x62);
1390                                 xscale_send_u32(target, 0x31);
1391                         }
1392                         else
1393                                 xscale_send_u32(target, 0x30);
1394
1395                         /* send CPSR */
1396                         xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1397                         DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1398
1399                         for (i = 7; i >= 0; i--)
1400                         {
1401                                 /* send register */
1402                                 xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
1403                                 DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
1404                         }
1405
1406                         /* send PC */
1407                         xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1408                         DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1409
1410                         /* wait for and process debug entry */
1411                         xscale_debug_entry(target);
1412
1413                         DEBUG("disable single-step");
1414                         xscale_disable_single_step(target);
1415
1416                         DEBUG("set breakpoint at 0x%8.8x", breakpoint->address);
1417                         xscale_set_breakpoint(target, breakpoint);
1418                 }
1419         }
1420
1421         /* enable any pending breakpoints and watchpoints */
1422         xscale_enable_breakpoints(target);
1423         xscale_enable_watchpoints(target);
1424
1425         /* restore banked registers */
1426         xscale_restore_context(target);
1427
1428         /* send resume request (command 0x30 or 0x31)
1429          * clean the trace buffer if it is to be enabled (0x62) */
1430         if (xscale->trace.buffer_enabled)
1431         {
1432                 xscale_send_u32(target, 0x62);
1433                 xscale_send_u32(target, 0x31);
1434         }
1435         else
1436                 xscale_send_u32(target, 0x30);
1437
1438         /* send CPSR */
1439         xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1440         DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1441
1442         for (i = 7; i >= 0; i--)
1443         {
1444                 /* send register */
1445                 xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
1446                 DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
1447         }
1448
1449         /* send PC */
1450         xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1451         DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1452
1453         target->debug_reason = DBG_REASON_NOTHALTED;
1454
1455         if (!debug_execution)
1456         {
1457                 /* registers are now invalid */
1458                 armv4_5_invalidate_core_regs(target);
1459                 target->state = TARGET_RUNNING;
1460                 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1461         }
1462         else
1463         {
1464                 target->state = TARGET_DEBUG_RUNNING;
1465                 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
1466         }
1467
1468         DEBUG("target resumed");
1469
1470         xscale->handler_running = 1;
1471
1472         return ERROR_OK;
1473 }
1474
1475 int xscale_step(struct target_s *target, int current, u32 address, int handle_breakpoints)
1476 {
1477         armv4_5_common_t *armv4_5 = target->arch_info;
1478         xscale_common_t *xscale = armv4_5->arch_info;
1479         breakpoint_t *breakpoint = target->breakpoints;
1480
1481         u32 current_pc, next_pc;
1482         int i;
1483         int retval;
1484
1485         if (target->state != TARGET_HALTED)
1486         {
1487                 WARNING("target not halted");
1488                 return ERROR_TARGET_NOT_HALTED;
1489         }
1490
1491         /* current = 1: continue on current pc, otherwise continue at <address> */
1492         if (!current)
1493                 buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, address);
1494
1495         current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
1496
1497         /* if we're at the reset vector, we have to simulate the step */
1498         if (current_pc == 0x0)
1499         {
1500                 arm_simulate_step(target, NULL);
1501                 current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
1502
1503                 target->debug_reason = DBG_REASON_SINGLESTEP;
1504                 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
1505
1506                 return ERROR_OK;
1507         }
1508
1509         /* the front-end may request us not to handle breakpoints */
1510         if (handle_breakpoints)
1511                 if ((breakpoint = breakpoint_find(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32))))
1512                 {
1513                         xscale_unset_breakpoint(target, breakpoint);
1514                 }
1515
1516         target->debug_reason = DBG_REASON_SINGLESTEP;
1517
1518         /* calculate PC of next instruction */
1519         if ((retval = arm_simulate_step(target, &next_pc)) != ERROR_OK)
1520         {
1521                 u32 current_opcode;
1522                 target_read_u32(target, current_pc, &current_opcode);
1523                 ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8x", current_opcode);
1524         }
1525
1526         DEBUG("enable single-step");
1527         xscale_enable_single_step(target, next_pc);
1528
1529         /* restore banked registers */
1530         xscale_restore_context(target);
1531
1532         /* send resume request (command 0x30 or 0x31)
1533          * clean the trace buffer if it is to be enabled (0x62) */
1534         if (xscale->trace.buffer_enabled)
1535         {
1536                 xscale_send_u32(target, 0x62);
1537                 xscale_send_u32(target, 0x31);
1538         }
1539         else
1540                 xscale_send_u32(target, 0x30);
1541
1542         /* send CPSR */
1543         xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1544         DEBUG("writing cpsr with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32));
1545
1546         for (i = 7; i >= 0; i--)
1547         {
1548                 /* send register */
1549                 xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
1550                 DEBUG("writing r%i with value 0x%8.8x", i, buf_get_u32(armv4_5->core_cache->reg_list[i].value, 0, 32));
1551         }
1552
1553         /* send PC */
1554         xscale_send_u32(target, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1555         DEBUG("writing PC with value 0x%8.8x", buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
1556
1557         target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1558
1559         /* registers are now invalid */
1560         armv4_5_invalidate_core_regs(target);
1561
1562         /* wait for and process debug entry */
1563         xscale_debug_entry(target);
1564
1565         DEBUG("disable single-step");
1566         xscale_disable_single_step(target);
1567
1568         target_call_event_callbacks(target, TARGET_EVENT_HALTED);
1569
1570         if (breakpoint)
1571         {
1572                 xscale_set_breakpoint(target, breakpoint);
1573         }
1574
1575         DEBUG("target stepped");
1576
1577         return ERROR_OK;
1578
1579 }
1580
1581 int xscale_assert_reset(target_t *target)
1582 {
1583         armv4_5_common_t *armv4_5 = target->arch_info;
1584         xscale_common_t *xscale = armv4_5->arch_info;
1585
1586         DEBUG("target->state: %s", target_state_strings[target->state]);
1587
1588         /* TRST every time. We want to be able to support daemon_startup attach */
1589         jtag_add_reset(1, 0);
1590         jtag_add_sleep(5000);
1591         jtag_add_reset(0, 0);
1592         jtag_add_sleep(5000);
1593         jtag_execute_queue();
1594
1595
1596
1597         /* select DCSR instruction (set endstate to R-T-I to ensure we don't
1598          * end up in T-L-R, which would reset JTAG
1599          */
1600         jtag_add_end_state(TAP_RTI);
1601         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, xscale->jtag_info.dcsr);
1602
1603         /* set Hold reset, Halt mode and Trap Reset */
1604         buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
1605         buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
1606         xscale_write_dcsr(target, 1, 0);
1607
1608         /* select BYPASS, because having DCSR selected caused problems on the PXA27x */
1609         xscale_jtag_set_instr(xscale->jtag_info.chain_pos, 0x7f);
1610         jtag_execute_queue();
1611
1612         /* assert reset */
1613         jtag_add_reset(0, 1);
1614
1615         /* sleep 1ms, to be sure we fulfill any requirements */
1616         jtag_add_sleep(1000);
1617         jtag_execute_queue();
1618
1619         target->state = TARGET_RESET;
1620
1621         return ERROR_OK;
1622 }
1623
1624 int xscale_deassert_reset(target_t *target)
1625 {
1626         armv4_5_common_t *armv4_5 = target->arch_info;
1627         xscale_common_t *xscale = armv4_5->arch_info;
1628
1629         fileio_t debug_handler;
1630         u32 address;
1631         u32 binary_size;
1632
1633         u32 buf_cnt;
1634         int i;
1635         int retval;
1636
1637         breakpoint_t *breakpoint = target->breakpoints;
1638
1639         DEBUG("-");
1640
1641         xscale->ibcr_available = 2;
1642         xscale->ibcr0_used = 0;
1643         xscale->ibcr1_used = 0;
1644
1645         xscale->dbr_available = 2;
1646         xscale->dbr0_used = 0;
1647         xscale->dbr1_used = 0;
1648
1649         /* mark all hardware breakpoints as unset */
1650         while (breakpoint)
1651         {
1652                 if (breakpoint->type == BKPT_HARD)
1653                 {
1654                         breakpoint->set = 0;
1655                 }
1656                 breakpoint = breakpoint->next;
1657         }
1658
1659         if (!xscale->handler_installed)
1660         {
1661                 /* release SRST */
1662                 jtag_add_reset(0, 0);
1663
1664                 /* wait 300ms; 150 and 100ms were not enough */
1665                 jtag_add_sleep(300*1000);
1666
1667                 jtag_add_runtest(2030, TAP_RTI);
1668                 jtag_execute_queue();
1669
1670                 /* set Hold reset, Halt mode and Trap Reset */
1671                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
1672                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
1673                 xscale_write_dcsr(target, 1, 0);
1674
1675                 /* Load debug handler */
1676                 if (fileio_open(&debug_handler, "xscale/debug_handler.bin", FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
1677                 {
1678                         return ERROR_OK;
1679                 }
1680
1681                 if ((binary_size = debug_handler.size) % 4)
1682                 {
1683                         ERROR("debug_handler.bin: size not a multiple of 4");
1684                         exit(-1);
1685                 }
1686
1687                 if (binary_size > 0x800)
1688                 {
1689                         ERROR("debug_handler.bin: larger than 2kb");
1690                         exit(-1);
1691                 }
1692
1693                 binary_size = CEIL(binary_size, 32) * 32;
1694
1695                 address = xscale->handler_address;
1696                 while (binary_size > 0)
1697                 {
1698                         u32 cache_line[8];
1699                         u8 buffer[32];
1700
1701                         if ((retval = fileio_read(&debug_handler, 32, buffer, &buf_cnt)) != ERROR_OK)
1702                         {
1703
1704                         }
1705
1706                         for (i = 0; i < buf_cnt; i += 4)
1707                         {
1708                                 /* convert LE buffer to host-endian u32 */
1709                                 cache_line[i / 4] = le_to_h_u32(&buffer[i]);
1710                         }
1711
1712                         for (; buf_cnt < 32; buf_cnt += 4)
1713                         {
1714                                         cache_line[buf_cnt / 4] = 0xe1a08008;
1715                         }
1716
1717                         /* only load addresses other than the reset vectors */
1718                         if ((address % 0x400) != 0x0)
1719                         {
1720                                 xscale_load_ic(target, 1, address, cache_line);
1721                         }
1722
1723                         address += buf_cnt;
1724                         binary_size -= buf_cnt;
1725                 };
1726
1727                 xscale_load_ic(target, 1, 0x0, xscale->low_vectors);
1728                 xscale_load_ic(target, 1, 0xffff0000, xscale->high_vectors);
1729
1730                 jtag_add_runtest(30, TAP_RTI);
1731
1732                 jtag_add_sleep(100000);
1733
1734                 /* set Hold reset, Halt mode and Trap Reset */
1735                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
1736                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
1737                 xscale_write_dcsr(target, 1, 0);
1738
1739                 /* clear Hold reset to let the target run (should enter debug handler) */
1740                 xscale_write_dcsr(target, 0, 1);
1741                 target->state = TARGET_RUNNING;
1742
1743                 if ((target->reset_mode != RESET_HALT) && (target->reset_mode != RESET_INIT))
1744                 {
1745                         jtag_add_sleep(10000);
1746
1747                         /* we should have entered debug now */
1748                         xscale_debug_entry(target);
1749                         target->state = TARGET_HALTED;
1750
1751                         /* resume the target */
1752                         xscale_resume(target, 1, 0x0, 1, 0);
1753                 }
1754
1755                 fileio_close(&debug_handler);
1756         }
1757         else
1758         {
1759                 jtag_add_reset(0, 0);
1760         }
1761
1762
1763         return ERROR_OK;
1764 }
1765
1766 int xscale_soft_reset_halt(struct target_s *target)
1767 {
1768
1769         return ERROR_OK;
1770 }
1771
1772 int xscale_prepare_reset_halt(struct target_s *target)
1773 {
1774         /* nothing to be done for reset_halt on XScale targets
1775          * we always halt after a reset to upload the debug handler
1776          */
1777         return ERROR_OK;
1778 }
1779
1780 int xscale_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mode)
1781 {
1782
1783         return ERROR_OK;
1784 }
1785
1786 int xscale_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, u32 value)
1787 {
1788
1789         return ERROR_OK;
1790 }
1791
1792 int xscale_full_context(target_t *target)
1793 {
1794         armv4_5_common_t *armv4_5 = target->arch_info;
1795
1796         u32 *buffer;
1797
1798         int i, j;
1799
1800         DEBUG("-");
1801
1802         if (target->state != TARGET_HALTED)
1803         {
1804                 WARNING("target not halted");
1805                 return ERROR_TARGET_NOT_HALTED;
1806         }
1807
1808         buffer = malloc(4 * 8);
1809
1810         /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1811          * we can't enter User mode on an XScale (unpredictable),
1812          * but User shares registers with SYS
1813          */
1814         for(i = 1; i < 7; i++)
1815         {
1816                 int valid = 1;
1817
1818                 /* check if there are invalid registers in the current mode
1819                  */
1820                 for (j = 0; j <= 16; j++)
1821                 {
1822                         if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid == 0)
1823                                 valid = 0;
1824                 }
1825
1826                 if (!valid)
1827                 {
1828                         u32 tmp_cpsr;
1829
1830                         /* request banked registers */
1831                         xscale_send_u32(target, 0x0);
1832
1833                         tmp_cpsr = 0x0;
1834                         tmp_cpsr |= armv4_5_number_to_mode(i);
1835                         tmp_cpsr |= 0xc0; /* I/F bits */
1836
1837                         /* send CPSR for desired mode */
1838                         xscale_send_u32(target, tmp_cpsr);
1839
1840                         /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
1841                         if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS))
1842                         {
1843                                 xscale_receive(target, buffer, 8);
1844                                 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32, buffer[7]);
1845                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0;
1846                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).valid = 1;
1847                         }
1848                         else
1849                         {
1850                                 xscale_receive(target, buffer, 7);
1851                         }
1852
1853                         /* move data from buffer to register cache */
1854                         for (j = 8; j <= 14; j++)
1855                         {
1856                                 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]);
1857                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0;
1858                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).valid = 1;
1859                         }
1860                 }
1861         }
1862
1863         free(buffer);
1864
1865         return ERROR_OK;
1866 }
1867
1868 int xscale_restore_context(target_t *target)
1869 {
1870         armv4_5_common_t *armv4_5 = target->arch_info;
1871
1872         int i, j;
1873
1874         DEBUG("-");
1875
1876         if (target->state != TARGET_HALTED)
1877         {
1878                 WARNING("target not halted");
1879                 return ERROR_TARGET_NOT_HALTED;
1880         }
1881
1882         /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1883         * we can't enter User mode on an XScale (unpredictable),
1884         * but User shares registers with SYS
1885         */
1886         for(i = 1; i < 7; i++)
1887         {
1888                 int dirty = 0;
1889
1890                 /* check if there are invalid registers in the current mode
1891                 */
1892                 for (j = 8; j <= 14; j++)
1893                 {
1894                         if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty == 1)
1895                                 dirty = 1;
1896                 }
1897
1898                 /* if not USR/SYS, check if the SPSR needs to be written */
1899                 if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS))
1900                 {
1901                         if (ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty == 1)
1902                                 dirty = 1;
1903                 }
1904
1905                 if (dirty)
1906                 {
1907                         u32 tmp_cpsr;
1908
1909                         /* send banked registers */
1910                         xscale_send_u32(target, 0x1);
1911
1912                         tmp_cpsr = 0x0;
1913                         tmp_cpsr |= armv4_5_number_to_mode(i);
1914                         tmp_cpsr |= 0xc0; /* I/F bits */
1915
1916                         /* send CPSR for desired mode */
1917                         xscale_send_u32(target, tmp_cpsr);
1918
1919                         /* send banked registers, r8 to r14, and spsr if not in USR/SYS mode */
1920                         for (j = 8; j <= 14; j++)
1921                         {
1922                                 xscale_send_u32(target, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, j).value, 0, 32));
1923                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), j).dirty = 0;
1924                         }
1925
1926                         if ((armv4_5_number_to_mode(i) != ARMV4_5_MODE_USR) && (armv4_5_number_to_mode(i) != ARMV4_5_MODE_SYS))
1927                         {
1928                                 xscale_send_u32(target, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32));
1929                                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_number_to_mode(i), 16).dirty = 0;
1930                         }
1931                 }
1932         }
1933
1934         return ERROR_OK;
1935 }
1936
1937 int xscale_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
1938 {
1939         armv4_5_common_t *armv4_5 = target->arch_info;
1940         xscale_common_t *xscale = armv4_5->arch_info;
1941         u32 *buf32;
1942         int i;
1943         int retval;
1944
1945         DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
1946
1947         if (target->state != TARGET_HALTED)
1948         {
1949                 WARNING("target not halted");
1950                 return ERROR_TARGET_NOT_HALTED;
1951         }
1952
1953         /* sanitize arguments */
1954         if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
1955                 return ERROR_INVALID_ARGUMENTS;
1956
1957         if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
1958                 return ERROR_TARGET_UNALIGNED_ACCESS;
1959
1960         /* send memory read request (command 0x1n, n: access size) */
1961         if ((retval=xscale_send_u32(target, 0x10 | size))!=ERROR_OK)
1962                 return retval;
1963
1964         /* send base address for read request */
1965         if ((retval=xscale_send_u32(target, address))!=ERROR_OK)
1966                 return retval;
1967
1968         /* send number of requested data words */
1969         if ((retval=xscale_send_u32(target, count))!=ERROR_OK)
1970                 return retval;
1971
1972         /* receive data from target (count times 32-bit words in host endianness) */
1973         buf32 = malloc(4 * count);
1974         if ((retval=xscale_receive(target, buf32, count))!=ERROR_OK)
1975                 return retval;
1976
1977         /* extract data from host-endian buffer into byte stream */
1978         for (i = 0; i < count; i++)
1979         {
1980                 switch (size)
1981                 {
1982                         case 4:
1983                                 target_buffer_set_u32(target, buffer, buf32[i]);
1984                                 buffer += 4;
1985                                 break;
1986                         case 2:
1987                                 target_buffer_set_u16(target, buffer, buf32[i] & 0xffff);
1988                                 buffer += 2;
1989                                 break;
1990                         case 1:
1991                                 *buffer++ = buf32[i] & 0xff;
1992                                 break;
1993                         default:
1994                                 ERROR("should never get here");
1995                                 exit(-1);
1996                 }
1997         }
1998
1999         free(buf32);
2000
2001         /* examine DCSR, to see if Sticky Abort (SA) got set */
2002         if ((retval=xscale_read_dcsr(target))!=ERROR_OK)
2003                 return retval;
2004         if (buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 5, 1) == 1)
2005         {
2006                 /* clear SA bit */
2007                 if ((retval=xscale_send_u32(target, 0x60))!=ERROR_OK)
2008                         return retval;
2009
2010                 return ERROR_TARGET_DATA_ABORT;
2011         }
2012
2013         return ERROR_OK;
2014 }
2015
2016 int xscale_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
2017 {
2018         armv4_5_common_t *armv4_5 = target->arch_info;
2019         xscale_common_t *xscale = armv4_5->arch_info;
2020         int retval;
2021
2022         DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
2023
2024         if (target->state != TARGET_HALTED)
2025         {
2026                 WARNING("target not halted");
2027                 return ERROR_TARGET_NOT_HALTED;
2028         }
2029
2030         /* sanitize arguments */
2031         if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
2032                 return ERROR_INVALID_ARGUMENTS;
2033
2034         if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
2035                 return ERROR_TARGET_UNALIGNED_ACCESS;
2036
2037         /* send memory write request (command 0x2n, n: access size) */
2038         if ((retval=xscale_send_u32(target, 0x20 | size))!=ERROR_OK)
2039                 return retval;
2040
2041         /* send base address for read request */
2042         if ((retval=xscale_send_u32(target, address))!=ERROR_OK)
2043                 return retval;
2044
2045         /* send number of requested data words to be written*/
2046         if ((retval=xscale_send_u32(target, count))!=ERROR_OK)
2047                 return retval;
2048
2049         /* extract data from host-endian buffer into byte stream */
2050 #if 0
2051         for (i = 0; i < count; i++)
2052         {
2053                 switch (size)
2054                 {
2055                         case 4:
2056                                 value = target_buffer_get_u32(target, buffer);
2057                                 xscale_send_u32(target, value);
2058                                 buffer += 4;
2059                                 break;
2060                         case 2:
2061                                 value = target_buffer_get_u16(target, buffer);
2062                                 xscale_send_u32(target, value);
2063                                 buffer += 2;
2064                                 break;
2065                         case 1:
2066                                 value = *buffer;
2067                                 xscale_send_u32(target, value);
2068                                 buffer += 1;
2069                                 break;
2070                         default:
2071                                 ERROR("should never get here");
2072                                 exit(-1);
2073                 }
2074         }
2075 #endif
2076         if ((retval=xscale_send(target, buffer, count, size))!=ERROR_OK)
2077                 return retval;
2078
2079         /* examine DCSR, to see if Sticky Abort (SA) got set */
2080         if ((retval=xscale_read_dcsr(target))!=ERROR_OK)
2081                 return retval;
2082         if (buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 5, 1) == 1)
2083         {
2084                 /* clear SA bit */
2085                 if ((retval=xscale_send_u32(target, 0x60))!=ERROR_OK)
2086                         return retval;
2087
2088                 return ERROR_TARGET_DATA_ABORT;
2089         }
2090
2091         return ERROR_OK;
2092 }
2093
2094 int xscale_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer)
2095 {
2096         return xscale_write_memory(target, address, 4, count, buffer);
2097 }
2098
2099 int xscale_checksum_memory(struct target_s *target, u32 address, u32 count, u32* checksum)
2100 {
2101         return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2102 }
2103
2104 u32 xscale_get_ttb(target_t *target)
2105 {
2106         armv4_5_common_t *armv4_5 = target->arch_info;
2107         xscale_common_t *xscale = armv4_5->arch_info;
2108         u32 ttb;
2109
2110         xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_TTB]);
2111         ttb = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_TTB].value, 0, 32);
2112
2113         return ttb;
2114 }
2115
2116 void xscale_disable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
2117 {
2118         armv4_5_common_t *armv4_5 = target->arch_info;
2119         xscale_common_t *xscale = armv4_5->arch_info;
2120         u32 cp15_control;
2121
2122         /* read cp15 control register */
2123         xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
2124         cp15_control = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
2125
2126         if (mmu)
2127                 cp15_control &= ~0x1U;
2128
2129         if (d_u_cache)
2130         {
2131                 /* clean DCache */
2132                 xscale_send_u32(target, 0x50);
2133                 xscale_send_u32(target, xscale->cache_clean_address);
2134
2135                 /* invalidate DCache */
2136                 xscale_send_u32(target, 0x51);
2137
2138                 cp15_control &= ~0x4U;
2139         }
2140
2141         if (i_cache)
2142         {
2143                 /* invalidate ICache */
2144                 xscale_send_u32(target, 0x52);
2145                 cp15_control &= ~0x1000U;
2146         }
2147
2148         /* write new cp15 control register */
2149         xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_CTRL], cp15_control);
2150
2151         /* execute cpwait to ensure outstanding operations complete */
2152         xscale_send_u32(target, 0x53);
2153 }
2154
2155 void xscale_enable_mmu_caches(target_t *target, int mmu, int d_u_cache, int i_cache)
2156 {
2157         armv4_5_common_t *armv4_5 = target->arch_info;
2158         xscale_common_t *xscale = armv4_5->arch_info;
2159         u32 cp15_control;
2160
2161         /* read cp15 control register */
2162         xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
2163         cp15_control = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
2164
2165         if (mmu)
2166                 cp15_control |= 0x1U;
2167
2168         if (d_u_cache)
2169                 cp15_control |= 0x4U;
2170
2171         if (i_cache)
2172                 cp15_control |= 0x1000U;
2173
2174         /* write new cp15 control register */
2175         xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_CTRL], cp15_control);
2176
2177         /* execute cpwait to ensure outstanding operations complete */
2178         xscale_send_u32(target, 0x53);
2179 }
2180
2181 int xscale_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
2182 {
2183         armv4_5_common_t *armv4_5 = target->arch_info;
2184         xscale_common_t *xscale = armv4_5->arch_info;
2185
2186         if (target->state != TARGET_HALTED)
2187         {
2188                 WARNING("target not halted");
2189                 return ERROR_TARGET_NOT_HALTED;
2190         }
2191
2192         if (xscale->force_hw_bkpts)
2193                 breakpoint->type = BKPT_HARD;
2194
2195         if (breakpoint->set)
2196         {
2197                 WARNING("breakpoint already set");
2198                 return ERROR_OK;
2199         }
2200
2201         if (breakpoint->type == BKPT_HARD)
2202         {
2203                 u32 value = breakpoint->address | 1;
2204                 if (!xscale->ibcr0_used)
2205                 {
2206                         xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR0], value);
2207                         xscale->ibcr0_used = 1;
2208                         breakpoint->set = 1;    /* breakpoint set on first breakpoint register */
2209                 }
2210                 else if (!xscale->ibcr1_used)
2211                 {
2212                         xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR1], value);
2213                         xscale->ibcr1_used = 1;
2214                         breakpoint->set = 2;    /* breakpoint set on second breakpoint register */
2215                 }
2216                 else
2217                 {
2218                         ERROR("BUG: no hardware comparator available");
2219                         return ERROR_OK;
2220                 }
2221         }
2222         else if (breakpoint->type == BKPT_SOFT)
2223         {
2224                 if (breakpoint->length == 4)
2225                 {
2226                         /* keep the original instruction in target endianness */
2227                         target->type->read_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr);
2228                         /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */
2229                         target_write_u32(target, breakpoint->address, xscale->arm_bkpt);
2230                 }
2231                 else
2232                 {
2233                         /* keep the original instruction in target endianness */
2234                         target->type->read_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr);
2235                         /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */
2236                         target_write_u32(target, breakpoint->address, xscale->thumb_bkpt);
2237                 }
2238                 breakpoint->set = 1;
2239         }
2240
2241         return ERROR_OK;
2242
2243 }
2244
2245 int xscale_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
2246 {
2247         armv4_5_common_t *armv4_5 = target->arch_info;
2248         xscale_common_t *xscale = armv4_5->arch_info;
2249
2250         if (target->state != TARGET_HALTED)
2251         {
2252                 WARNING("target not halted");
2253                 return ERROR_TARGET_NOT_HALTED;
2254         }
2255
2256         if (xscale->force_hw_bkpts)
2257         {
2258                 DEBUG("forcing use of hardware breakpoint at address 0x%8.8x", breakpoint->address);
2259                 breakpoint->type = BKPT_HARD;
2260         }
2261
2262         if ((breakpoint->type == BKPT_HARD) && (xscale->ibcr_available < 1))
2263         {
2264                 INFO("no breakpoint unit available for hardware breakpoint");
2265                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2266         }
2267         else
2268         {
2269                 xscale->ibcr_available--;
2270         }
2271
2272         if ((breakpoint->length != 2) && (breakpoint->length != 4))
2273         {
2274                 INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
2275                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2276         }
2277
2278         return ERROR_OK;
2279 }
2280
2281 int xscale_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
2282 {
2283         armv4_5_common_t *armv4_5 = target->arch_info;
2284         xscale_common_t *xscale = armv4_5->arch_info;
2285
2286         if (target->state != TARGET_HALTED)
2287         {
2288                 WARNING("target not halted");
2289                 return ERROR_TARGET_NOT_HALTED;
2290         }
2291
2292         if (!breakpoint->set)
2293         {
2294                 WARNING("breakpoint not set");
2295                 return ERROR_OK;
2296         }
2297
2298         if (breakpoint->type == BKPT_HARD)
2299         {
2300                 if (breakpoint->set == 1)
2301                 {
2302                         xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR0], 0x0);
2303                         xscale->ibcr0_used = 0;
2304                 }
2305                 else if (breakpoint->set == 2)
2306                 {
2307                         xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR1], 0x0);
2308                         xscale->ibcr1_used = 0;
2309                 }
2310                 breakpoint->set = 0;
2311         }
2312         else
2313         {
2314                 /* restore original instruction (kept in target endianness) */
2315                 if (breakpoint->length == 4)
2316                 {
2317                         target->type->write_memory(target, breakpoint->address, 4, 1, breakpoint->orig_instr);
2318                 }
2319                 else
2320                 {
2321                         target->type->write_memory(target, breakpoint->address, 2, 1, breakpoint->orig_instr);
2322                 }
2323                 breakpoint->set = 0;
2324         }
2325
2326         return ERROR_OK;
2327 }
2328
2329 int xscale_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
2330 {
2331         armv4_5_common_t *armv4_5 = target->arch_info;
2332         xscale_common_t *xscale = armv4_5->arch_info;
2333
2334         if (target->state != TARGET_HALTED)
2335         {
2336                 WARNING("target not halted");
2337                 return ERROR_TARGET_NOT_HALTED;
2338         }
2339
2340         if (breakpoint->set)
2341         {
2342                 xscale_unset_breakpoint(target, breakpoint);
2343         }
2344
2345         if (breakpoint->type == BKPT_HARD)
2346                 xscale->ibcr_available++;
2347
2348         return ERROR_OK;
2349 }
2350
2351 int xscale_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
2352 {
2353         armv4_5_common_t *armv4_5 = target->arch_info;
2354         xscale_common_t *xscale = armv4_5->arch_info;
2355         u8 enable=0;
2356         reg_t *dbcon = &xscale->reg_cache->reg_list[XSCALE_DBCON];
2357         u32 dbcon_value = buf_get_u32(dbcon->value, 0, 32);
2358
2359         if (target->state != TARGET_HALTED)
2360         {
2361                 WARNING("target not halted");
2362                 return ERROR_TARGET_NOT_HALTED;
2363         }
2364
2365         xscale_get_reg(dbcon);
2366
2367         switch (watchpoint->rw)
2368         {
2369                 case WPT_READ:
2370                         enable = 0x3;
2371                         break;
2372                 case WPT_ACCESS:
2373                         enable = 0x2;
2374                         break;
2375                 case WPT_WRITE:
2376                         enable = 0x1;
2377                         break;
2378                 default:
2379                         ERROR("BUG: watchpoint->rw neither read, write nor access");
2380         }
2381
2382         if (!xscale->dbr0_used)
2383         {
2384                 xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR0], watchpoint->address);
2385                 dbcon_value |= enable;
2386                 xscale_set_reg_u32(dbcon, dbcon_value);
2387                 watchpoint->set = 1;
2388                 xscale->dbr0_used = 1;
2389         }
2390         else if (!xscale->dbr1_used)
2391         {
2392                 xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR1], watchpoint->address);
2393                 dbcon_value |= enable << 2;
2394                 xscale_set_reg_u32(dbcon, dbcon_value);
2395                 watchpoint->set = 2;
2396                 xscale->dbr1_used = 1;
2397         }
2398         else
2399         {
2400                 ERROR("BUG: no hardware comparator available");
2401                 return ERROR_OK;
2402         }
2403
2404         return ERROR_OK;
2405 }
2406
2407 int xscale_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
2408 {
2409         armv4_5_common_t *armv4_5 = target->arch_info;
2410         xscale_common_t *xscale = armv4_5->arch_info;
2411
2412         if (target->state != TARGET_HALTED)
2413         {
2414                 WARNING("target not halted");
2415                 return ERROR_TARGET_NOT_HALTED;
2416         }
2417
2418         if (xscale->dbr_available < 1)
2419         {
2420                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2421         }
2422
2423         if ((watchpoint->length != 1) && (watchpoint->length != 2) && (watchpoint->length != 4))
2424         {
2425                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2426         }
2427
2428         xscale->dbr_available--;
2429
2430         return ERROR_OK;
2431 }
2432
2433 int xscale_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
2434 {
2435         armv4_5_common_t *armv4_5 = target->arch_info;
2436         xscale_common_t *xscale = armv4_5->arch_info;
2437         reg_t *dbcon = &xscale->reg_cache->reg_list[XSCALE_DBCON];
2438         u32 dbcon_value = buf_get_u32(dbcon->value, 0, 32);
2439
2440         if (target->state != TARGET_HALTED)
2441         {
2442                 WARNING("target not halted");
2443                 return ERROR_TARGET_NOT_HALTED;
2444         }
2445
2446         if (!watchpoint->set)
2447         {
2448                 WARNING("breakpoint not set");
2449                 return ERROR_OK;
2450         }
2451
2452         if (watchpoint->set == 1)
2453         {
2454                 dbcon_value &= ~0x3;
2455                 xscale_set_reg_u32(dbcon, dbcon_value);
2456                 xscale->dbr0_used = 0;
2457         }
2458         else if (watchpoint->set == 2)
2459         {
2460                 dbcon_value &= ~0xc;
2461                 xscale_set_reg_u32(dbcon, dbcon_value);
2462                 xscale->dbr1_used = 0;
2463         }
2464         watchpoint->set = 0;
2465
2466         return ERROR_OK;
2467 }
2468
2469 int xscale_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
2470 {
2471         armv4_5_common_t *armv4_5 = target->arch_info;
2472         xscale_common_t *xscale = armv4_5->arch_info;
2473
2474         if (target->state != TARGET_HALTED)
2475         {
2476                 WARNING("target not halted");
2477                 return ERROR_TARGET_NOT_HALTED;
2478         }
2479
2480         if (watchpoint->set)
2481         {
2482                 xscale_unset_watchpoint(target, watchpoint);
2483         }
2484
2485         xscale->dbr_available++;
2486
2487         return ERROR_OK;
2488 }
2489
2490 void xscale_enable_watchpoints(struct target_s *target)
2491 {
2492         watchpoint_t *watchpoint = target->watchpoints;
2493
2494         while (watchpoint)
2495         {
2496                 if (watchpoint->set == 0)
2497                         xscale_set_watchpoint(target, watchpoint);
2498                 watchpoint = watchpoint->next;
2499         }
2500 }
2501
2502 void xscale_enable_breakpoints(struct target_s *target)
2503 {
2504         breakpoint_t *breakpoint = target->breakpoints;
2505
2506         /* set any pending breakpoints */
2507         while (breakpoint)
2508         {
2509                 if (breakpoint->set == 0)
2510                         xscale_set_breakpoint(target, breakpoint);
2511                 breakpoint = breakpoint->next;
2512         }
2513 }
2514
2515 int xscale_get_reg(reg_t *reg)
2516 {
2517         xscale_reg_t *arch_info = reg->arch_info;
2518         target_t *target = arch_info->target;
2519         armv4_5_common_t *armv4_5 = target->arch_info;
2520         xscale_common_t *xscale = armv4_5->arch_info;
2521
2522         /* DCSR, TX and RX are accessible via JTAG */
2523         if (strcmp(reg->name, "XSCALE_DCSR") == 0)
2524         {
2525                 return xscale_read_dcsr(arch_info->target);
2526         }
2527         else if (strcmp(reg->name, "XSCALE_TX") == 0)
2528         {
2529                 /* 1 = consume register content */
2530                 return xscale_read_tx(arch_info->target, 1);
2531         }
2532         else if (strcmp(reg->name, "XSCALE_RX") == 0)
2533         {
2534                 /* can't read from RX register (host -> debug handler) */
2535                 return ERROR_OK;
2536         }
2537         else if (strcmp(reg->name, "XSCALE_TXRXCTRL") == 0)
2538         {
2539                 /* can't (explicitly) read from TXRXCTRL register */
2540                 return ERROR_OK;
2541         }
2542         else /* Other DBG registers have to be transfered by the debug handler */
2543         {
2544                 /* send CP read request (command 0x40) */
2545                 xscale_send_u32(target, 0x40);
2546
2547                 /* send CP register number */
2548                 xscale_send_u32(target, arch_info->dbg_handler_number);
2549
2550                 /* read register value */
2551                 xscale_read_tx(target, 1);
2552                 buf_cpy(xscale->reg_cache->reg_list[XSCALE_TX].value, reg->value, 32);
2553
2554                 reg->dirty = 0;
2555                 reg->valid = 1;
2556         }
2557
2558         return ERROR_OK;
2559 }
2560
2561 int xscale_set_reg(reg_t *reg, u8* buf)
2562 {
2563         xscale_reg_t *arch_info = reg->arch_info;
2564         target_t *target = arch_info->target;
2565         armv4_5_common_t *armv4_5 = target->arch_info;
2566         xscale_common_t *xscale = armv4_5->arch_info;
2567         u32 value = buf_get_u32(buf, 0, 32);
2568
2569         /* DCSR, TX and RX are accessible via JTAG */
2570         if (strcmp(reg->name, "XSCALE_DCSR") == 0)
2571         {
2572                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 0, 32, value);
2573                 return xscale_write_dcsr(arch_info->target, -1, -1);
2574         }
2575         else if (strcmp(reg->name, "XSCALE_RX") == 0)
2576         {
2577                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_RX].value, 0, 32, value);
2578                 return xscale_write_rx(arch_info->target);
2579         }
2580         else if (strcmp(reg->name, "XSCALE_TX") == 0)
2581         {
2582                 /* can't write to TX register (debug-handler -> host) */
2583                 return ERROR_OK;
2584         }
2585         else if (strcmp(reg->name, "XSCALE_TXRXCTRL") == 0)
2586         {
2587                 /* can't (explicitly) write to TXRXCTRL register */
2588                 return ERROR_OK;
2589         }
2590         else /* Other DBG registers have to be transfered by the debug handler */
2591         {
2592                 /* send CP write request (command 0x41) */
2593                 xscale_send_u32(target, 0x41);
2594
2595                 /* send CP register number */
2596                 xscale_send_u32(target, arch_info->dbg_handler_number);
2597
2598                 /* send CP register value */
2599                 xscale_send_u32(target, value);
2600                 buf_set_u32(reg->value, 0, 32, value);
2601         }
2602
2603         return ERROR_OK;
2604 }
2605
2606 /* convenience wrapper to access XScale specific registers */
2607 int xscale_set_reg_u32(reg_t *reg, u32 value)
2608 {
2609         u8 buf[4];
2610
2611         buf_set_u32(buf, 0, 32, value);
2612
2613         return xscale_set_reg(reg, buf);
2614 }
2615
2616 int xscale_write_dcsr_sw(target_t *target, u32 value)
2617 {
2618         /* get pointers to arch-specific information */
2619         armv4_5_common_t *armv4_5 = target->arch_info;
2620         xscale_common_t *xscale = armv4_5->arch_info;
2621         reg_t *dcsr = &xscale->reg_cache->reg_list[XSCALE_DCSR];
2622         xscale_reg_t *dcsr_arch_info = dcsr->arch_info;
2623
2624         /* send CP write request (command 0x41) */
2625         xscale_send_u32(target, 0x41);
2626
2627         /* send CP register number */
2628         xscale_send_u32(target, dcsr_arch_info->dbg_handler_number);
2629
2630         /* send CP register value */
2631         xscale_send_u32(target, value);
2632         buf_set_u32(dcsr->value, 0, 32, value);
2633
2634         return ERROR_OK;
2635 }
2636
2637 int xscale_read_trace(target_t *target)
2638 {
2639         /* get pointers to arch-specific information */
2640         armv4_5_common_t *armv4_5 = target->arch_info;
2641         xscale_common_t *xscale = armv4_5->arch_info;
2642         xscale_trace_data_t **trace_data_p;
2643
2644         /* 258 words from debug handler
2645          * 256 trace buffer entries
2646          * 2 checkpoint addresses
2647          */
2648         u32 trace_buffer[258];
2649         int is_address[256];
2650         int i, j;
2651
2652         if (target->state != TARGET_HALTED)
2653         {
2654                 WARNING("target must be stopped to read trace data");
2655                 return ERROR_TARGET_NOT_HALTED;
2656         }
2657
2658         /* send read trace buffer command (command 0x61) */
2659         xscale_send_u32(target, 0x61);
2660
2661         /* receive trace buffer content */
2662         xscale_receive(target, trace_buffer, 258);
2663
2664         /* parse buffer backwards to identify address entries */
2665         for (i = 255; i >= 0; i--)
2666         {
2667                 is_address[i] = 0;
2668                 if (((trace_buffer[i] & 0xf0) == 0x90) ||
2669                         ((trace_buffer[i] & 0xf0) == 0xd0))
2670                 {
2671                         if (i >= 3)
2672                                 is_address[--i] = 1;
2673                         if (i >= 2)
2674                                 is_address[--i] = 1;
2675                         if (i >= 1)
2676                                 is_address[--i] = 1;
2677                         if (i >= 0)
2678                                 is_address[--i] = 1;
2679                 }
2680         }
2681
2682
2683         /* search first non-zero entry */
2684         for (j = 0; (j < 256) && (trace_buffer[j] == 0) && (!is_address[j]); j++)
2685                 ;
2686
2687         if (j == 256)
2688         {
2689                 DEBUG("no trace data collected");
2690                 return ERROR_XSCALE_NO_TRACE_DATA;
2691         }
2692
2693         for (trace_data_p = &xscale->trace.data; *trace_data_p; trace_data_p = &(*trace_data_p)->next)
2694                 ;
2695
2696         *trace_data_p = malloc(sizeof(xscale_trace_data_t));
2697         (*trace_data_p)->next = NULL;
2698         (*trace_data_p)->chkpt0 = trace_buffer[256];
2699         (*trace_data_p)->chkpt1 = trace_buffer[257];
2700         (*trace_data_p)->last_instruction = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
2701         (*trace_data_p)->entries = malloc(sizeof(xscale_trace_entry_t) * (256 - j));
2702         (*trace_data_p)->depth = 256 - j;
2703
2704         for (i = j; i < 256; i++)
2705         {
2706                 (*trace_data_p)->entries[i - j].data = trace_buffer[i];
2707                 if (is_address[i])
2708                         (*trace_data_p)->entries[i - j].type = XSCALE_TRACE_ADDRESS;
2709                 else
2710                         (*trace_data_p)->entries[i - j].type = XSCALE_TRACE_MESSAGE;
2711         }
2712
2713         return ERROR_OK;
2714 }
2715
2716 int xscale_read_instruction(target_t *target, arm_instruction_t *instruction)
2717 {
2718         /* get pointers to arch-specific information */
2719         armv4_5_common_t *armv4_5 = target->arch_info;
2720         xscale_common_t *xscale = armv4_5->arch_info;
2721         int i;
2722         int section = -1;
2723         u32 size_read;
2724         u32 opcode;
2725         int retval;
2726
2727         if (!xscale->trace.image)
2728                 return ERROR_TRACE_IMAGE_UNAVAILABLE;
2729
2730         /* search for the section the current instruction belongs to */
2731         for (i = 0; i < xscale->trace.image->num_sections; i++)
2732         {
2733                 if ((xscale->trace.image->sections[i].base_address <= xscale->trace.current_pc) &&
2734                         (xscale->trace.image->sections[i].base_address + xscale->trace.image->sections[i].size > xscale->trace.current_pc))
2735                 {
2736                         section = i;
2737                         break;
2738                 }
2739         }
2740
2741         if (section == -1)
2742         {
2743                 /* current instruction couldn't be found in the image */
2744                 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
2745         }
2746
2747         if (xscale->trace.core_state == ARMV4_5_STATE_ARM)
2748         {
2749                 u8 buf[4];
2750                 if ((retval = image_read_section(xscale->trace.image, section,
2751                         xscale->trace.current_pc - xscale->trace.image->sections[section].base_address,
2752                         4, buf, &size_read)) != ERROR_OK)
2753                 {
2754                         ERROR("error while reading instruction: %i", retval);
2755                         return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
2756                 }
2757                 opcode = target_buffer_get_u32(target, buf);
2758                 arm_evaluate_opcode(opcode, xscale->trace.current_pc, instruction);
2759         }
2760         else if (xscale->trace.core_state == ARMV4_5_STATE_THUMB)
2761         {
2762                 u8 buf[2];
2763                 if ((retval = image_read_section(xscale->trace.image, section,
2764                         xscale->trace.current_pc - xscale->trace.image->sections[section].base_address,
2765                         2, buf, &size_read)) != ERROR_OK)
2766                 {
2767                         ERROR("error while reading instruction: %i", retval);
2768                         return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
2769                 }
2770                 opcode = target_buffer_get_u16(target, buf);
2771                 thumb_evaluate_opcode(opcode, xscale->trace.current_pc, instruction);
2772         }
2773         else
2774         {
2775                 ERROR("BUG: unknown core state encountered");
2776                 exit(-1);
2777         }
2778
2779         return ERROR_OK;
2780 }
2781
2782 int xscale_branch_address(xscale_trace_data_t *trace_data, int i, u32 *target)
2783 {
2784         /* if there are less than four entries prior to the indirect branch message
2785          * we can't extract the address */
2786         if (i < 4)
2787         {
2788                 return -1;
2789         }
2790
2791         *target = (trace_data->entries[i-1].data) | (trace_data->entries[i-2].data << 8) |
2792                                 (trace_data->entries[i-3].data << 16) | (trace_data->entries[i-4].data << 24);
2793
2794         return 0;
2795 }
2796
2797 int xscale_analyze_trace(target_t *target, command_context_t *cmd_ctx)
2798 {
2799         /* get pointers to arch-specific information */
2800         armv4_5_common_t *armv4_5 = target->arch_info;
2801         xscale_common_t *xscale = armv4_5->arch_info;
2802         int next_pc_ok = 0;
2803         u32 next_pc = 0x0;
2804         xscale_trace_data_t *trace_data = xscale->trace.data;
2805         int retval;
2806
2807         while (trace_data)
2808         {
2809                 int i, chkpt;
2810                 int rollover;
2811                 int branch;
2812                 int exception;
2813                 xscale->trace.core_state = ARMV4_5_STATE_ARM;
2814
2815                 chkpt = 0;
2816                 rollover = 0;
2817
2818                 for (i = 0; i < trace_data->depth; i++)
2819                 {
2820                         next_pc_ok = 0;
2821                         branch = 0;
2822                         exception = 0;
2823
2824                         if (trace_data->entries[i].type == XSCALE_TRACE_ADDRESS)
2825                                 continue;
2826
2827                         switch ((trace_data->entries[i].data & 0xf0) >> 4)
2828                         {
2829                                 case 0:         /* Exceptions */
2830                                 case 1:
2831                                 case 2:
2832                                 case 3:
2833                                 case 4:
2834                                 case 5:
2835                                 case 6:
2836                                 case 7:
2837                                         exception = (trace_data->entries[i].data & 0x70) >> 4;
2838                                         next_pc_ok = 1;
2839                                         next_pc = (trace_data->entries[i].data & 0xf0) >> 2;
2840                                         command_print(cmd_ctx, "--- exception %i ---", (trace_data->entries[i].data & 0xf0) >> 4);
2841                                         break;
2842                                 case 8:         /* Direct Branch */
2843                                         branch = 1;
2844                                         break;
2845                                 case 9:         /* Indirect Branch */
2846                                         branch = 1;
2847                                         if (xscale_branch_address(trace_data, i, &next_pc) == 0)
2848                                         {
2849                                                 next_pc_ok = 1;
2850                                         }
2851                                         break;
2852                                 case 13:        /* Checkpointed Indirect Branch */
2853                                         if (xscale_branch_address(trace_data, i, &next_pc) == 0)
2854                                         {
2855                                                 next_pc_ok = 1;
2856                                                 if (((chkpt == 0) && (next_pc != trace_data->chkpt0))
2857                                                         || ((chkpt == 1) && (next_pc != trace_data->chkpt1)))
2858                                                         WARNING("checkpointed indirect branch target address doesn't match checkpoint");
2859                                         }
2860                                         /* explicit fall-through */
2861                                 case 12:        /* Checkpointed Direct Branch */
2862                                         branch = 1;
2863                                         if (chkpt == 0)
2864                                         {
2865                                                 next_pc_ok = 1;
2866                                                 next_pc = trace_data->chkpt0;
2867                                                 chkpt++;
2868                                         }
2869                                         else if (chkpt == 1)
2870                                         {
2871                                                 next_pc_ok = 1;
2872                                                 next_pc = trace_data->chkpt0;
2873                                                 chkpt++;
2874                                         }
2875                                         else
2876                                         {
2877                                                 WARNING("more than two checkpointed branches encountered");
2878                                         }
2879                                         break;
2880                                 case 15:        /* Roll-over */
2881                                         rollover++;
2882                                         continue;
2883                                 default:        /* Reserved */
2884                                         command_print(cmd_ctx, "--- reserved trace message ---");
2885                                         ERROR("BUG: trace message %i is reserved", (trace_data->entries[i].data & 0xf0) >> 4);
2886                                         return ERROR_OK;
2887                         }
2888
2889                         if (xscale->trace.pc_ok)
2890                         {
2891                                 int executed = (trace_data->entries[i].data & 0xf) + rollover * 16;
2892                                 arm_instruction_t instruction;
2893
2894                                 if ((exception == 6) || (exception == 7))
2895                                 {
2896                                         /* IRQ or FIQ exception, no instruction executed */
2897                                         executed -= 1;
2898                                 }
2899
2900                                 while (executed-- >= 0)
2901                                 {
2902                                         if ((retval = xscale_read_instruction(target, &instruction)) != ERROR_OK)
2903                                         {
2904                                                 /* can't continue tracing with no image available */
2905                                                 if (retval == ERROR_TRACE_IMAGE_UNAVAILABLE)
2906                                                 {
2907                                                         return retval;
2908                                                 }
2909                                                 else if (retval == ERROR_TRACE_INSTRUCTION_UNAVAILABLE)
2910                                                 {
2911                                                         /* TODO: handle incomplete images */
2912                                                 }
2913                                         }
2914
2915                                         /* a precise abort on a load to the PC is included in the incremental
2916                                          * word count, other instructions causing data aborts are not included
2917                                          */
2918                                         if ((executed == 0) && (exception == 4)
2919                                                 && ((instruction.type >= ARM_LDR) && (instruction.type <= ARM_LDM)))
2920                                         {
2921                                                 if ((instruction.type == ARM_LDM)
2922                                                         && ((instruction.info.load_store_multiple.register_list & 0x8000) == 0))
2923                                                 {
2924                                                         executed--;
2925                                                 }
2926                                                 else if (((instruction.type >= ARM_LDR) && (instruction.type <= ARM_LDRSH))
2927                                                         && (instruction.info.load_store.Rd != 15))
2928                                                 {
2929                                                         executed--;
2930                                                 }
2931                                         }
2932
2933                                         /* only the last instruction executed
2934                                          * (the one that caused the control flow change)
2935                                          * could be a taken branch
2936                                          */
2937                                         if (((executed == -1) && (branch == 1)) &&
2938                                                 (((instruction.type == ARM_B) ||
2939                                                         (instruction.type == ARM_BL) ||
2940                                                         (instruction.type == ARM_BLX)) &&
2941                                                         (instruction.info.b_bl_bx_blx.target_address != -1)))
2942                                         {
2943                                                 xscale->trace.current_pc = instruction.info.b_bl_bx_blx.target_address;
2944                                         }
2945                                         else
2946                                         {
2947                                                 xscale->trace.current_pc += (xscale->trace.core_state == ARMV4_5_STATE_ARM) ? 4 : 2;
2948                                         }
2949                                         command_print(cmd_ctx, "%s", instruction.text);
2950                                 }
2951
2952                                 rollover = 0;
2953                         }
2954
2955                         if (next_pc_ok)
2956                         {
2957                                 xscale->trace.current_pc = next_pc;
2958                                 xscale->trace.pc_ok = 1;
2959                         }
2960                 }
2961
2962                 for (; xscale->trace.current_pc < trace_data->last_instruction; xscale->trace.current_pc += (xscale->trace.core_state == ARMV4_5_STATE_ARM) ? 4 : 2)
2963                 {
2964                         arm_instruction_t instruction;
2965                         if ((retval = xscale_read_instruction(target, &instruction)) != ERROR_OK)
2966                         {
2967                                 /* can't continue tracing with no image available */
2968                                 if (retval == ERROR_TRACE_IMAGE_UNAVAILABLE)
2969                                 {
2970                                         return retval;
2971                                 }
2972                                 else if (retval == ERROR_TRACE_INSTRUCTION_UNAVAILABLE)
2973                                 {
2974                                         /* TODO: handle incomplete images */
2975                                 }
2976                         }
2977                         command_print(cmd_ctx, "%s", instruction.text);
2978                 }
2979
2980                 trace_data = trace_data->next;
2981         }
2982
2983         return ERROR_OK;
2984 }
2985
2986 void xscale_build_reg_cache(target_t *target)
2987 {
2988         /* get pointers to arch-specific information */
2989         armv4_5_common_t *armv4_5 = target->arch_info;
2990         xscale_common_t *xscale = armv4_5->arch_info;
2991
2992         reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
2993         xscale_reg_t *arch_info = malloc(sizeof(xscale_reg_arch_info));
2994         int i;
2995         int num_regs = sizeof(xscale_reg_arch_info) / sizeof(xscale_reg_t);
2996
2997         (*cache_p) = armv4_5_build_reg_cache(target, armv4_5);
2998         armv4_5->core_cache = (*cache_p);
2999
3000         /* register a register arch-type for XScale dbg registers only once */
3001         if (xscale_reg_arch_type == -1)
3002                 xscale_reg_arch_type = register_reg_arch_type(xscale_get_reg, xscale_set_reg);
3003
3004         (*cache_p)->next = malloc(sizeof(reg_cache_t));
3005         cache_p = &(*cache_p)->next;
3006
3007         /* fill in values for the xscale reg cache */
3008         (*cache_p)->name = "XScale registers";
3009         (*cache_p)->next = NULL;
3010         (*cache_p)->reg_list = malloc(num_regs * sizeof(reg_t));
3011         (*cache_p)->num_regs = num_regs;
3012
3013         for (i = 0; i < num_regs; i++)
3014         {
3015                 (*cache_p)->reg_list[i].name = xscale_reg_list[i];
3016                 (*cache_p)->reg_list[i].value = calloc(4, 1);
3017                 (*cache_p)->reg_list[i].dirty = 0;
3018                 (*cache_p)->reg_list[i].valid = 0;
3019                 (*cache_p)->reg_list[i].size = 32;
3020                 (*cache_p)->reg_list[i].bitfield_desc = NULL;
3021                 (*cache_p)->reg_list[i].num_bitfields = 0;
3022                 (*cache_p)->reg_list[i].arch_info = &arch_info[i];
3023                 (*cache_p)->reg_list[i].arch_type = xscale_reg_arch_type;
3024                 arch_info[i] = xscale_reg_arch_info[i];
3025                 arch_info[i].target = target;
3026         }
3027
3028         xscale->reg_cache = (*cache_p);
3029 }
3030
3031 int xscale_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
3032 {
3033         return ERROR_OK;
3034 }
3035
3036 int xscale_quit()
3037 {
3038
3039         return ERROR_OK;
3040 }
3041
3042 int xscale_init_arch_info(target_t *target, xscale_common_t *xscale, int chain_pos, char *variant)
3043 {
3044         armv4_5_common_t *armv4_5;
3045         u32 high_reset_branch, low_reset_branch;
3046         int i;
3047
3048         armv4_5 = &xscale->armv4_5_common;
3049
3050         /* store architecture specfic data (none so far) */
3051         xscale->arch_info = NULL;
3052         xscale->common_magic = XSCALE_COMMON_MAGIC;
3053
3054         /* remember the variant (PXA25x, PXA27x, IXP42x, ...) */
3055         xscale->variant = strdup(variant);
3056
3057         /* prepare JTAG information for the new target */
3058         xscale->jtag_info.chain_pos = chain_pos;
3059
3060         xscale->jtag_info.dbgrx = 0x02;
3061         xscale->jtag_info.dbgtx = 0x10;
3062         xscale->jtag_info.dcsr = 0x09;
3063         xscale->jtag_info.ldic = 0x07;
3064
3065         if ((strcmp(xscale->variant, "pxa250") == 0) ||
3066                 (strcmp(xscale->variant, "pxa255") == 0) ||
3067                 (strcmp(xscale->variant, "pxa26x") == 0))
3068         {
3069                 xscale->jtag_info.ir_length = 5;
3070         }
3071         else if ((strcmp(xscale->variant, "pxa27x") == 0) ||
3072                 (strcmp(xscale->variant, "ixp42x") == 0) ||
3073                 (strcmp(xscale->variant, "ixp45x") == 0) ||
3074                 (strcmp(xscale->variant, "ixp46x") == 0))
3075         {
3076                 xscale->jtag_info.ir_length = 7;
3077         }
3078
3079         /* the debug handler isn't installed (and thus not running) at this time */
3080         xscale->handler_installed = 0;
3081         xscale->handler_running = 0;
3082         xscale->handler_address = 0xfe000800;
3083
3084         /* clear the vectors we keep locally for reference */
3085         memset(xscale->low_vectors, 0, sizeof(xscale->low_vectors));
3086         memset(xscale->high_vectors, 0, sizeof(xscale->high_vectors));
3087
3088         /* no user-specified vectors have been configured yet */
3089         xscale->static_low_vectors_set = 0x0;
3090         xscale->static_high_vectors_set = 0x0;
3091
3092         /* calculate branches to debug handler */
3093         low_reset_branch = (xscale->handler_address + 0x20 - 0x0 - 0x8) >> 2;
3094         high_reset_branch = (xscale->handler_address + 0x20 - 0xffff0000 - 0x8) >> 2;
3095
3096         xscale->low_vectors[0] = ARMV4_5_B((low_reset_branch & 0xffffff), 0);
3097         xscale->high_vectors[0] = ARMV4_5_B((high_reset_branch & 0xffffff), 0);
3098
3099         for (i = 1; i <= 7; i++)
3100         {
3101                 xscale->low_vectors[i] = ARMV4_5_B(0xfffffe, 0);
3102                 xscale->high_vectors[i] = ARMV4_5_B(0xfffffe, 0);
3103         }
3104
3105         /* 64kB aligned region used for DCache cleaning */
3106         xscale->cache_clean_address = 0xfffe0000;
3107
3108         xscale->hold_rst = 0;
3109         xscale->external_debug_break = 0;
3110
3111         xscale->force_hw_bkpts = 1;
3112
3113         xscale->ibcr_available = 2;
3114         xscale->ibcr0_used = 0;
3115         xscale->ibcr1_used = 0;
3116
3117         xscale->dbr_available = 2;
3118         xscale->dbr0_used = 0;
3119         xscale->dbr1_used = 0;
3120
3121         xscale->arm_bkpt = ARMV5_BKPT(0x0);
3122         xscale->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
3123
3124         xscale->vector_catch = 0x1;
3125
3126         xscale->trace.capture_status = TRACE_IDLE;
3127         xscale->trace.data = NULL;
3128         xscale->trace.image = NULL;
3129         xscale->trace.buffer_enabled = 0;
3130         xscale->trace.buffer_fill = 0;
3131
3132         /* prepare ARMv4/5 specific information */
3133         armv4_5->arch_info = xscale;
3134         armv4_5->read_core_reg = xscale_read_core_reg;
3135         armv4_5->write_core_reg = xscale_write_core_reg;
3136         armv4_5->full_context = xscale_full_context;
3137
3138         armv4_5_init_arch_info(target, armv4_5);
3139
3140         xscale->armv4_5_mmu.armv4_5_cache.ctype = -1;
3141         xscale->armv4_5_mmu.get_ttb = xscale_get_ttb;
3142         xscale->armv4_5_mmu.read_memory = xscale_read_memory;
3143         xscale->armv4_5_mmu.write_memory = xscale_write_memory;
3144         xscale->armv4_5_mmu.disable_mmu_caches = xscale_disable_mmu_caches;
3145         xscale->armv4_5_mmu.enable_mmu_caches = xscale_enable_mmu_caches;
3146         xscale->armv4_5_mmu.has_tiny_pages = 1;
3147         xscale->armv4_5_mmu.mmu_enabled = 0;
3148
3149         xscale->fast_memory_access = 0;
3150
3151         return ERROR_OK;
3152 }
3153
3154 /* target xscale <endianess> <startup_mode> <chain_pos> <variant> */
3155 int xscale_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
3156 {
3157         int chain_pos;
3158         char *variant = NULL;
3159         xscale_common_t *xscale = malloc(sizeof(xscale_common_t));
3160         memset(xscale, 0, sizeof(*xscale));
3161
3162         if (argc < 5)
3163         {
3164                 ERROR("'target xscale' requires four arguments: <endianess> <startup_mode> <chain_pos> <variant>");
3165                 return ERROR_OK;
3166         }
3167
3168         chain_pos = strtoul(args[3], NULL, 0);
3169
3170         variant = args[4];
3171
3172         xscale_init_arch_info(target, xscale, chain_pos, variant);
3173         xscale_build_reg_cache(target);
3174
3175         return ERROR_OK;
3176 }
3177
3178 int xscale_handle_debug_handler_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3179 {
3180         target_t *target = NULL;
3181         armv4_5_common_t *armv4_5;
3182         xscale_common_t *xscale;
3183
3184         u32 handler_address;
3185
3186         if (argc < 2)
3187         {
3188                 ERROR("'xscale debug_handler <target#> <address>' command takes two required operands");
3189                 return ERROR_OK;
3190         }
3191
3192         if ((target = get_target_by_num(strtoul(args[0], NULL, 0))) == NULL)
3193         {
3194                 ERROR("no target '%s' configured", args[0]);
3195                 return ERROR_OK;
3196         }
3197
3198         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3199         {
3200                 return ERROR_OK;
3201         }
3202
3203         handler_address = strtoul(args[1], NULL, 0);
3204
3205         if (((handler_address >= 0x800) && (handler_address <= 0x1fef800)) ||
3206                 ((handler_address >= 0xfe000800) && (handler_address <= 0xfffff800)))
3207         {
3208                 xscale->handler_address = handler_address;
3209         }
3210         else
3211         {
3212                 ERROR("xscale debug_handler <address> must be between 0x800 and 0x1fef800 or between 0xfe000800 and 0xfffff800");
3213         }
3214
3215         return ERROR_OK;
3216 }
3217
3218 int xscale_handle_cache_clean_address_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3219 {
3220         target_t *target = NULL;
3221         armv4_5_common_t *armv4_5;
3222         xscale_common_t *xscale;
3223
3224         u32 cache_clean_address;
3225
3226         if (argc < 2)
3227         {
3228                 ERROR("'xscale cache_clean_address <target#> <address>' command takes two required operands");
3229                 return ERROR_OK;
3230         }
3231
3232         if ((target = get_target_by_num(strtoul(args[0], NULL, 0))) == NULL)
3233         {
3234                 ERROR("no target '%s' configured", args[0]);
3235                 return ERROR_OK;
3236         }
3237
3238         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3239         {
3240                 return ERROR_OK;
3241         }
3242
3243         cache_clean_address = strtoul(args[1], NULL, 0);
3244
3245         if (cache_clean_address & 0xffff)
3246         {
3247                 ERROR("xscale cache_clean_address <address> must be 64kb aligned");
3248         }
3249         else
3250         {
3251                 xscale->cache_clean_address = cache_clean_address;
3252         }
3253
3254         return ERROR_OK;
3255 }
3256
3257 int xscale_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3258 {
3259         target_t *target = get_current_target(cmd_ctx);
3260         armv4_5_common_t *armv4_5;
3261         xscale_common_t *xscale;
3262
3263         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3264         {
3265                 return ERROR_OK;
3266         }
3267
3268         return armv4_5_handle_cache_info_command(cmd_ctx, &xscale->armv4_5_mmu.armv4_5_cache);
3269 }
3270
3271 static int xscale_virt2phys(struct target_s *target, u32 virtual, u32 *physical)
3272 {
3273         armv4_5_common_t *armv4_5;
3274         xscale_common_t *xscale;
3275         int retval;
3276         int type;
3277         u32 cb;
3278         int domain;
3279         u32 ap;
3280
3281
3282         if ((retval = xscale_get_arch_pointers(target, &armv4_5, &xscale)) != ERROR_OK)
3283         {
3284                 return retval;
3285         }
3286         u32 ret = armv4_5_mmu_translate_va(target, &xscale->armv4_5_mmu, virtual, &type, &cb, &domain, &ap);
3287         if (type == -1)
3288         {
3289                 return ret;
3290         }
3291         *physical = ret;
3292         return ERROR_OK;
3293 }
3294
3295 static int xscale_mmu(struct target_s *target, int *enabled)
3296 {
3297         armv4_5_common_t *armv4_5 = target->arch_info;
3298         xscale_common_t *xscale = armv4_5->arch_info;
3299
3300         if (target->state != TARGET_HALTED)
3301         {
3302                 ERROR("Target not halted");
3303                 return ERROR_TARGET_INVALID;
3304         }
3305         *enabled = xscale->armv4_5_mmu.mmu_enabled;
3306         return ERROR_OK;
3307 }
3308
3309
3310 int xscale_handle_mmu_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
3311 {
3312         target_t *target = get_current_target(cmd_ctx);
3313         armv4_5_common_t *armv4_5;
3314         xscale_common_t *xscale;
3315
3316         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3317         {
3318                 return ERROR_OK;
3319         }
3320
3321         if (target->state != TARGET_HALTED)
3322         {
3323                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
3324                 return ERROR_OK;
3325         }
3326
3327         if (argc >= 1)
3328         {
3329                 if (strcmp("enable", args[0]) == 0)
3330                 {
3331                         xscale_enable_mmu_caches(target, 1, 0, 0);
3332                         xscale->armv4_5_mmu.mmu_enabled = 1;
3333                 }
3334                 else if (strcmp("disable", args[0]) == 0)
3335                 {
3336                         xscale_disable_mmu_caches(target, 1, 0, 0);
3337                         xscale->armv4_5_mmu.mmu_enabled = 0;
3338                 }
3339         }
3340
3341         command_print(cmd_ctx, "mmu %s", (xscale->armv4_5_mmu.mmu_enabled) ? "enabled" : "disabled");
3342
3343         return ERROR_OK;
3344 }
3345
3346 int xscale_handle_idcache_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
3347 {
3348         target_t *target = get_current_target(cmd_ctx);
3349         armv4_5_common_t *armv4_5;
3350         xscale_common_t *xscale;
3351         int icache = 0, dcache = 0;
3352
3353         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3354         {
3355                 return ERROR_OK;
3356         }
3357
3358         if (target->state != TARGET_HALTED)
3359         {
3360                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
3361                 return ERROR_OK;
3362         }
3363
3364         if (strcmp(cmd, "icache") == 0)
3365                 icache = 1;
3366         else if (strcmp(cmd, "dcache") == 0)
3367                 dcache = 1;
3368
3369         if (argc >= 1)
3370         {
3371                 if (strcmp("enable", args[0]) == 0)
3372                 {
3373                         xscale_enable_mmu_caches(target, 0, dcache, icache);
3374
3375                         if (icache)
3376                                 xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 1;
3377                         else if (dcache)
3378                                 xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 1;
3379                 }
3380                 else if (strcmp("disable", args[0]) == 0)
3381                 {
3382                         xscale_disable_mmu_caches(target, 0, dcache, icache);
3383
3384                         if (icache)
3385                                 xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = 0;
3386                         else if (dcache)
3387                                 xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = 0;
3388                 }
3389         }
3390
3391         if (icache)
3392                 command_print(cmd_ctx, "icache %s", (xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled) ? "enabled" : "disabled");
3393
3394         if (dcache)
3395                 command_print(cmd_ctx, "dcache %s", (xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled) ? "enabled" : "disabled");
3396
3397         return ERROR_OK;
3398 }
3399
3400 int xscale_handle_vector_catch_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
3401 {
3402         target_t *target = get_current_target(cmd_ctx);
3403         armv4_5_common_t *armv4_5;
3404         xscale_common_t *xscale;
3405
3406         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3407         {
3408                 return ERROR_OK;
3409         }
3410
3411         if (argc < 1)
3412         {
3413                 command_print(cmd_ctx, "usage: xscale vector_catch [mask]");
3414         }
3415         else
3416         {
3417                 xscale->vector_catch = strtoul(args[0], NULL, 0);
3418                 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 8, xscale->vector_catch);
3419                 xscale_write_dcsr(target, -1, -1);
3420         }
3421
3422         command_print(cmd_ctx, "vector catch mask: 0x%2.2x", xscale->vector_catch);
3423
3424         return ERROR_OK;
3425 }
3426
3427 int xscale_handle_force_hw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3428 {
3429         target_t *target = get_current_target(cmd_ctx);
3430         armv4_5_common_t *armv4_5;
3431         xscale_common_t *xscale;
3432
3433         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3434         {
3435                 return ERROR_OK;
3436         }
3437
3438         if ((argc >= 1) && (strcmp("enable", args[0]) == 0))
3439         {
3440                 xscale->force_hw_bkpts = 1;
3441         }
3442         else if ((argc >= 1) && (strcmp("disable", args[0]) == 0))
3443         {
3444                 xscale->force_hw_bkpts = 0;
3445         }
3446         else
3447         {
3448                 command_print(cmd_ctx, "usage: xscale force_hw_bkpts <enable|disable>");
3449         }
3450
3451         command_print(cmd_ctx, "force hardware breakpoints %s", (xscale->force_hw_bkpts) ? "enabled" : "disabled");
3452
3453         return ERROR_OK;
3454 }
3455
3456 int xscale_handle_trace_buffer_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3457 {
3458         target_t *target = get_current_target(cmd_ctx);
3459         armv4_5_common_t *armv4_5;
3460         xscale_common_t *xscale;
3461         u32 dcsr_value;
3462
3463         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3464         {
3465                 return ERROR_OK;
3466         }
3467
3468         if (target->state != TARGET_HALTED)
3469         {
3470                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
3471                 return ERROR_OK;
3472         }
3473
3474         if ((argc >= 1) && (strcmp("enable", args[0]) == 0))
3475         {
3476                 xscale_trace_data_t *td, *next_td;
3477                 xscale->trace.buffer_enabled = 1;
3478
3479                 /* free old trace data */
3480                 td = xscale->trace.data;
3481                 while (td)
3482                 {
3483                         next_td = td->next;
3484
3485                         if (td->entries)
3486                                 free(td->entries);
3487                         free(td);
3488                         td = next_td;
3489                 }
3490                 xscale->trace.data = NULL;
3491         }
3492         else if ((argc >= 1) && (strcmp("disable", args[0]) == 0))
3493         {
3494                 xscale->trace.buffer_enabled = 0;
3495         }
3496
3497         if ((argc >= 2) && (strcmp("fill", args[1]) == 0))
3498         {
3499                 if (argc >= 3)
3500                         xscale->trace.buffer_fill = strtoul(args[2], NULL, 0);
3501                 else
3502                         xscale->trace.buffer_fill = 1;
3503         }
3504         else if ((argc >= 2) && (strcmp("wrap", args[1]) == 0))
3505         {
3506                 xscale->trace.buffer_fill = -1;
3507         }
3508
3509         if (xscale->trace.buffer_enabled)
3510         {
3511                 /* if we enable the trace buffer in fill-once
3512                  * mode we know the address of the first instruction */
3513                 xscale->trace.pc_ok = 1;
3514                 xscale->trace.current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32);
3515         }
3516         else
3517         {
3518                 /* otherwise the address is unknown, and we have no known good PC */
3519                 xscale->trace.pc_ok = 0;
3520         }
3521
3522         command_print(cmd_ctx, "trace buffer %s (%s)",
3523                 (xscale->trace.buffer_enabled) ? "enabled" : "disabled",
3524                 (xscale->trace.buffer_fill > 0) ? "fill" : "wrap");
3525
3526         dcsr_value = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 0, 32);
3527         if (xscale->trace.buffer_fill >= 0)
3528                 xscale_write_dcsr_sw(target, (dcsr_value & 0xfffffffc) | 2);
3529         else
3530                 xscale_write_dcsr_sw(target, dcsr_value & 0xfffffffc);
3531
3532         return ERROR_OK;
3533 }
3534
3535 int xscale_handle_trace_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3536 {
3537         target_t *target;
3538         armv4_5_common_t *armv4_5;
3539         xscale_common_t *xscale;
3540
3541         if (argc < 1)
3542         {
3543                 command_print(cmd_ctx, "usage: xscale trace_image <file> [base address] [type]");
3544                 return ERROR_OK;
3545         }
3546
3547         target = get_current_target(cmd_ctx);
3548
3549         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3550         {
3551                 return ERROR_OK;
3552         }
3553
3554         if (xscale->trace.image)
3555         {
3556                 image_close(xscale->trace.image);
3557                 free(xscale->trace.image);
3558                 command_print(cmd_ctx, "previously loaded image found and closed");
3559         }
3560
3561         xscale->trace.image = malloc(sizeof(image_t));
3562         xscale->trace.image->base_address_set = 0;
3563         xscale->trace.image->start_address_set = 0;
3564
3565         /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
3566         if (argc >= 2)
3567         {
3568                 xscale->trace.image->base_address_set = 1;
3569                 xscale->trace.image->base_address = strtoul(args[1], NULL, 0);
3570         }
3571         else
3572         {
3573                 xscale->trace.image->base_address_set = 0;
3574         }
3575
3576         if (image_open(xscale->trace.image, args[0], (argc >= 3) ? args[2] : NULL) != ERROR_OK)
3577         {
3578                 free(xscale->trace.image);
3579                 xscale->trace.image = NULL;
3580                 return ERROR_OK;
3581         }
3582
3583         return ERROR_OK;
3584 }
3585
3586 int xscale_handle_dump_trace_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3587 {
3588         target_t *target = get_current_target(cmd_ctx);
3589         armv4_5_common_t *armv4_5;
3590         xscale_common_t *xscale;
3591         xscale_trace_data_t *trace_data;
3592         fileio_t file;
3593
3594         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3595         {
3596                 return ERROR_OK;
3597         }
3598
3599         if (target->state != TARGET_HALTED)
3600         {
3601                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
3602                 return ERROR_OK;
3603         }
3604
3605         if (argc < 1)
3606         {
3607                 command_print(cmd_ctx, "usage: xscale dump_trace <file>");
3608                 return ERROR_OK;
3609         }
3610
3611         trace_data = xscale->trace.data;
3612
3613         if (!trace_data)
3614         {
3615                 command_print(cmd_ctx, "no trace data collected");
3616                 return ERROR_OK;
3617         }
3618
3619         if (fileio_open(&file, args[0], FILEIO_WRITE, FILEIO_BINARY) != ERROR_OK)
3620         {
3621                 return ERROR_OK;
3622         }
3623
3624         while (trace_data)
3625         {
3626                 int i;
3627
3628                 fileio_write_u32(&file, trace_data->chkpt0);
3629                 fileio_write_u32(&file, trace_data->chkpt1);
3630                 fileio_write_u32(&file, trace_data->last_instruction);
3631                 fileio_write_u32(&file, trace_data->depth);
3632
3633                 for (i = 0; i < trace_data->depth; i++)
3634                         fileio_write_u32(&file, trace_data->entries[i].data | ((trace_data->entries[i].type & 0xffff) << 16));
3635
3636                 trace_data = trace_data->next;
3637         }
3638
3639         fileio_close(&file);
3640
3641         return ERROR_OK;
3642 }
3643
3644 int xscale_handle_analyze_trace_buffer_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3645 {
3646         target_t *target = get_current_target(cmd_ctx);
3647         armv4_5_common_t *armv4_5;
3648         xscale_common_t *xscale;
3649
3650         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3651         {
3652                 return ERROR_OK;
3653         }
3654
3655         xscale_analyze_trace(target, cmd_ctx);
3656
3657         return ERROR_OK;
3658 }
3659
3660 int xscale_handle_cp15(command_context_t *cmd_ctx, char *cmd, char **args, int argc)
3661 {
3662         target_t *target = get_current_target(cmd_ctx);
3663         armv4_5_common_t *armv4_5;
3664         xscale_common_t *xscale;
3665
3666         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3667         {
3668                 return ERROR_OK;
3669         }
3670
3671         if (target->state != TARGET_HALTED)
3672         {
3673                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
3674                 return ERROR_OK;
3675         }
3676         u32 reg_no = 0;
3677         reg_t *reg = NULL;
3678         if(argc > 0)
3679         {
3680                 reg_no = strtoul(args[0], NULL, 0);
3681                 /*translate from xscale cp15 register no to openocd register*/
3682                 switch(reg_no)
3683                 {
3684                 case 0:
3685                         reg_no = XSCALE_MAINID;
3686                         break;
3687                 case 1:
3688                         reg_no = XSCALE_CTRL;
3689                         break;
3690                 case 2:
3691                         reg_no = XSCALE_TTB;
3692                         break;
3693                 case 3:
3694                         reg_no = XSCALE_DAC;
3695                         break;
3696                 case 5:
3697                         reg_no = XSCALE_FSR;
3698                         break;
3699                 case 6:
3700                         reg_no = XSCALE_FAR;
3701                         break;
3702                 case 13:
3703                         reg_no = XSCALE_PID;
3704                         break;
3705                 case 15:
3706                         reg_no = XSCALE_CPACCESS;
3707                         break;
3708                 default:
3709                         command_print(cmd_ctx, "invalid register number");
3710                         return ERROR_INVALID_ARGUMENTS;
3711                 }
3712                 reg = &xscale->reg_cache->reg_list[reg_no];
3713
3714         }
3715         if(argc == 1)
3716         {
3717                 u32 value;
3718
3719                 /* read cp15 control register */
3720                 xscale_get_reg(reg);
3721                 value = buf_get_u32(reg->value, 0, 32);
3722                 command_print(cmd_ctx, "%s (/%i): 0x%x", reg->name, reg->size, value);
3723         }
3724         else if(argc == 2)
3725         {
3726
3727                 u32 value = strtoul(args[1], NULL, 0);
3728
3729                 /* send CP write request (command 0x41) */
3730                 xscale_send_u32(target, 0x41);
3731
3732                 /* send CP register number */
3733                 xscale_send_u32(target, reg_no);
3734
3735                 /* send CP register value */
3736                 xscale_send_u32(target, value);
3737
3738                 /* execute cpwait to ensure outstanding operations complete */
3739                 xscale_send_u32(target, 0x53);
3740         }
3741         else
3742         {
3743                 command_print(cmd_ctx, "usage: cp15 [register]<, [value]>");
3744         }
3745
3746         return ERROR_OK;
3747 }
3748
3749 int handle_xscale_fast_memory_access_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
3750 {
3751         target_t *target = get_current_target(cmd_ctx);
3752         armv4_5_common_t *armv4_5;
3753         xscale_common_t *xscale;
3754
3755         if (xscale_get_arch_pointers(target, &armv4_5, &xscale) != ERROR_OK)
3756         {
3757                 return ERROR_OK;
3758         }
3759
3760         if (argc == 1)
3761         {
3762                 if (strcmp("enable", args[0]) == 0)
3763                 {
3764                         xscale->fast_memory_access = 1;
3765                 }
3766                 else if (strcmp("disable", args[0]) == 0)
3767                 {
3768                         xscale->fast_memory_access = 0;
3769                 }
3770                 else
3771                 {
3772                         return ERROR_COMMAND_SYNTAX_ERROR;
3773                 }
3774         } else if (argc!=0)
3775         {
3776                 return ERROR_COMMAND_SYNTAX_ERROR;
3777         }
3778
3779         command_print(cmd_ctx, "fast memory access is %s", (xscale->fast_memory_access) ? "enabled" : "disabled");
3780
3781         return ERROR_OK;
3782 }
3783
3784 int xscale_register_commands(struct command_context_s *cmd_ctx)
3785 {
3786         command_t *xscale_cmd;
3787
3788         xscale_cmd = register_command(cmd_ctx, NULL, "xscale", NULL, COMMAND_ANY, "xscale specific commands");
3789
3790         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");
3791         register_command(cmd_ctx, xscale_cmd, "cache_clean_address", xscale_handle_cache_clean_address_command, COMMAND_ANY, NULL);
3792
3793         register_command(cmd_ctx, xscale_cmd, "cache_info", xscale_handle_cache_info_command, COMMAND_EXEC, NULL);
3794         register_command(cmd_ctx, xscale_cmd, "mmu", xscale_handle_mmu_command, COMMAND_EXEC, "['enable'|'disable'] the MMU");
3795         register_command(cmd_ctx, xscale_cmd, "icache", xscale_handle_idcache_command, COMMAND_EXEC, "['enable'|'disable'] the ICache");
3796         register_command(cmd_ctx, xscale_cmd, "dcache", xscale_handle_idcache_command, COMMAND_EXEC, "['enable'|'disable'] the DCache");
3797
3798         register_command(cmd_ctx, xscale_cmd, "vector_catch", xscale_handle_idcache_command, COMMAND_EXEC, "<mask> of vectors that should be catched");
3799
3800         register_command(cmd_ctx, xscale_cmd, "trace_buffer", xscale_handle_trace_buffer_command, COMMAND_EXEC, "<enable|disable> ['fill' [n]|'wrap']");
3801
3802         register_command(cmd_ctx, xscale_cmd, "dump_trace", xscale_handle_dump_trace_command, COMMAND_EXEC, "dump content of trace buffer to <file>");
3803         register_command(cmd_ctx, xscale_cmd, "analyze_trace", xscale_handle_analyze_trace_buffer_command, COMMAND_EXEC, "analyze content of trace buffer");
3804         register_command(cmd_ctx, xscale_cmd, "trace_image", xscale_handle_trace_image_command,
3805                 COMMAND_EXEC, "load image from <file> [base address]");
3806
3807         register_command(cmd_ctx, xscale_cmd, "cp15", xscale_handle_cp15, COMMAND_EXEC, "access coproc 15 <register> [value]");
3808         register_command(cmd_ctx, xscale_cmd, "fast_memory_access", handle_xscale_fast_memory_access_command,
3809                  COMMAND_ANY, "use fast memory accesses instead of slower but potentially unsafe slow accesses <enable|disable>");
3810
3811
3812         armv4_5_register_commands(cmd_ctx);
3813
3814         return ERROR_OK;
3815 }