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   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "arm.h"
  25 #include "etm.h"
  26 #include "etb.h"
  27 #include "register.h"
  28
  29
  30 static char* etb_reg_list[] =
  31 {
  32         "ETB_identification",
  33         "ETB_ram_depth",
  34         "ETB_ram_width",
  35         "ETB_status",
  36         "ETB_ram_data",
  37         "ETB_ram_read_pointer",
  38         "ETB_ram_write_pointer",
  39         "ETB_trigger_counter",
  40         "ETB_control",
  41 };
  42
  43 static int etb_get_reg(struct reg *reg);
  44
  45 static int etb_set_instr(struct etb *etb, uint32_t new_instr)
  46 {
  47         struct jtag_tap *tap;
  48
  49         tap = etb->tap;
  50         if (tap == NULL)
  51                 return ERROR_FAIL;
  52
  53         if (buf_get_u32(tap->cur_instr, 0, tap->ir_length) != new_instr)
  54         {
  55                 struct scan_field field;
  56
  57                 field.tap = tap;
  58                 field.num_bits = tap->ir_length;
  59                 field.out_value = calloc(DIV_ROUND_UP(field.num_bits, 8), 1);
  60                 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
  61
  62                 field.in_value = NULL;
  63
  64                 jtag_add_ir_scan(1, &field, jtag_get_end_state());
  65
  66                 free(field.out_value);
  67         }
  68
  69         return ERROR_OK;
  70 }
  71
  72 static int etb_scann(struct etb *etb, uint32_t new_scan_chain)
  73 {
  74         if (etb->cur_scan_chain != new_scan_chain)
  75         {
  76                 struct scan_field field;
  77
  78                 field.tap = etb->tap;
  79                 field.num_bits = 5;
  80                 field.out_value = calloc(DIV_ROUND_UP(field.num_bits, 8), 1);
  81                 buf_set_u32(field.out_value, 0, field.num_bits, new_scan_chain);
  82
  83                 field.in_value = NULL;
  84
  85                 /* select INTEST instruction */
  86                 etb_set_instr(etb, 0x2);
  87                 jtag_add_dr_scan(1, &field, jtag_get_end_state());
  88
  89                 etb->cur_scan_chain = new_scan_chain;
  90
  91                 free(field.out_value);
  92         }
  93
  94         return ERROR_OK;
  95 }
  96
  97 static int etb_read_reg_w_check(struct reg *, uint8_t *, uint8_t *);
  98 static int etb_set_reg_w_exec(struct reg *, uint8_t *);
  99
 100 static int etb_read_reg(struct reg *reg)
 101 {
 102         return etb_read_reg_w_check(reg, NULL, NULL);
 103 }
 104
 105 static int etb_get_reg(struct reg *reg)
 106 {
 107         int retval;
 108
 109         if ((retval = etb_read_reg(reg)) != ERROR_OK)
 110         {
 111                 LOG_ERROR("BUG: error scheduling ETB register read");
 112                 return retval;
 113         }
 114
 115         if ((retval = jtag_execute_queue()) != ERROR_OK)
 116         {
 117                 LOG_ERROR("ETB register read failed");
 118                 return retval;
 119         }
 120
 121         return ERROR_OK;
 122 }
 123
 124 static const struct reg_arch_type etb_reg_type = {
 125         .get = etb_get_reg,
 126         .set = etb_set_reg_w_exec,
 127 };
 128
 129 struct reg_cache* etb_build_reg_cache(struct etb *etb)
 130 {
 131         struct reg_cache *reg_cache = malloc(sizeof(struct reg_cache));
 132         struct reg *reg_list = NULL;
 133         struct etb_reg *arch_info = NULL;
 134         int num_regs = 9;
 135         int i;
 136
 137         /* the actual registers are kept in two arrays */
 138         reg_list = calloc(num_regs, sizeof(struct reg));
 139         arch_info = calloc(num_regs, sizeof(struct etb_reg));
 140
 141         /* fill in values for the reg cache */
 142         reg_cache->name = "etb registers";
 143         reg_cache->next = NULL;
 144         reg_cache->reg_list = reg_list;
 145         reg_cache->num_regs = num_regs;
 146
 147         /* set up registers */
 148         for (i = 0; i < num_regs; i++)
 149         {
 150                 reg_list[i].name = etb_reg_list[i];
 151                 reg_list[i].size = 32;
 152                 reg_list[i].dirty = 0;
 153                 reg_list[i].valid = 0;
 154                 reg_list[i].value = calloc(1, 4);
 155                 reg_list[i].arch_info = &arch_info[i];
 156                 reg_list[i].type = &etb_reg_type;
 157                 reg_list[i].size = 32;
 158                 arch_info[i].addr = i;
 159                 arch_info[i].etb = etb;
 160         }
 161
 162         return reg_cache;
 163 }
 164
 165 static void etb_getbuf(jtag_callback_data_t arg)
 166 {
 167         uint8_t *in = (uint8_t *)arg;
 168
 169         *((uint32_t *)in) = buf_get_u32(in, 0, 32);
 170 }
 171
 172
 173 static int etb_read_ram(struct etb *etb, uint32_t *data, int num_frames)
 174 {
 175         struct scan_field fields[3];
 176         int i;
 177
 178         jtag_set_end_state(TAP_IDLE);
 179         etb_scann(etb, 0x0);
 180         etb_set_instr(etb, 0xc);
 181
 182         fields[0].tap = etb->tap;
 183         fields[0].num_bits = 32;
 184         fields[0].out_value = NULL;
 185         fields[0].in_value = NULL;
 186
 187         fields[1].tap = etb->tap;
 188         fields[1].num_bits = 7;
 189         fields[1].out_value = malloc(1);
 190         buf_set_u32(fields[1].out_value, 0, 7, 4);
 191         fields[1].in_value = NULL;
 192
 193         fields[2].tap = etb->tap;
 194         fields[2].num_bits = 1;
 195         fields[2].out_value = malloc(1);
 196         buf_set_u32(fields[2].out_value, 0, 1, 0);
 197         fields[2].in_value = NULL;
 198
 199         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 200
 201         for (i = 0; i < num_frames; i++)
 202         {
 203                 /* ensure nR/W reamins set to read */
 204                 buf_set_u32(fields[2].out_value, 0, 1, 0);
 205
 206                 /* address remains set to 0x4 (RAM data) until we read the last frame */
 207                 if (i < num_frames - 1)
 208                         buf_set_u32(fields[1].out_value, 0, 7, 4);
 209                 else
 210                         buf_set_u32(fields[1].out_value, 0, 7, 0);
 211
 212                 fields[0].in_value = (uint8_t *)(data + i);
 213                 jtag_add_dr_scan(3, fields, jtag_get_end_state());
 214
 215                 jtag_add_callback(etb_getbuf, (jtag_callback_data_t)(data + i));
 216         }
 217
 218         jtag_execute_queue();
 219
 220         free(fields[1].out_value);
 221         free(fields[2].out_value);
 222
 223         return ERROR_OK;
 224 }
 225
 226 static int etb_read_reg_w_check(struct reg *reg,
 227                 uint8_t* check_value, uint8_t* check_mask)
 228 {
 229         struct etb_reg *etb_reg = reg->arch_info;
 230         uint8_t reg_addr = etb_reg->addr & 0x7f;
 231         struct scan_field fields[3];
 232
 233         LOG_DEBUG("%i", (int)(etb_reg->addr));
 234
 235         jtag_set_end_state(TAP_IDLE);
 236         etb_scann(etb_reg->etb, 0x0);
 237         etb_set_instr(etb_reg->etb, 0xc);
 238
 239         fields[0].tap = etb_reg->etb->tap;
 240         fields[0].num_bits = 32;
 241         fields[0].out_value = reg->value;
 242         fields[0].in_value = NULL;
 243         fields[0].check_value = NULL;
 244         fields[0].check_mask = NULL;
 245
 246         fields[1].tap = etb_reg->etb->tap;
 247         fields[1].num_bits = 7;
 248         fields[1].out_value = malloc(1);
 249         buf_set_u32(fields[1].out_value, 0, 7, reg_addr);
 250         fields[1].in_value = NULL;
 251         fields[1].check_value = NULL;
 252         fields[1].check_mask = NULL;
 253
 254         fields[2].tap = etb_reg->etb->tap;
 255         fields[2].num_bits = 1;
 256         fields[2].out_value = malloc(1);
 257         buf_set_u32(fields[2].out_value, 0, 1, 0);
 258         fields[2].in_value = NULL;
 259         fields[2].check_value = NULL;
 260         fields[2].check_mask = NULL;
 261
 262         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 263
 264         /* read the identification register in the second run, to make sure we
 265          * don't read the ETB data register twice, skipping every second entry
 266          */
 267         buf_set_u32(fields[1].out_value, 0, 7, 0x0);
 268         fields[0].in_value = reg->value;
 269         fields[0].check_value = check_value;
 270         fields[0].check_mask = check_mask;
 271
 272         jtag_add_dr_scan_check(3, fields, jtag_get_end_state());
 273
 274         free(fields[1].out_value);
 275         free(fields[2].out_value);
 276
 277         return ERROR_OK;
 278 }
 279
 280 static int etb_write_reg(struct reg *, uint32_t);
 281
 282 static int etb_set_reg(struct reg *reg, uint32_t value)
 283 {
 284         int retval;
 285
 286         if ((retval = etb_write_reg(reg, value)) != ERROR_OK)
 287         {
 288                 LOG_ERROR("BUG: error scheduling ETB register write");
 289                 return retval;
 290         }
 291
 292         buf_set_u32(reg->value, 0, reg->size, value);
 293         reg->valid = 1;
 294         reg->dirty = 0;
 295
 296         return ERROR_OK;
 297 }
 298
 299 static int etb_set_reg_w_exec(struct reg *reg, uint8_t *buf)
 300 {
 301         int retval;
 302
 303         etb_set_reg(reg, buf_get_u32(buf, 0, reg->size));
 304
 305         if ((retval = jtag_execute_queue()) != ERROR_OK)
 306         {
 307                 LOG_ERROR("ETB: register write failed");
 308                 return retval;
 309         }
 310         return ERROR_OK;
 311 }
 312
 313 static int etb_write_reg(struct reg *reg, uint32_t value)
 314 {
 315         struct etb_reg *etb_reg = reg->arch_info;
 316         uint8_t reg_addr = etb_reg->addr & 0x7f;
 317         struct scan_field fields[3];
 318
 319         LOG_DEBUG("%i: 0x%8.8" PRIx32 "", (int)(etb_reg->addr), value);
 320
 321         jtag_set_end_state(TAP_IDLE);
 322         etb_scann(etb_reg->etb, 0x0);
 323         etb_set_instr(etb_reg->etb, 0xc);
 324
 325         fields[0].tap = etb_reg->etb->tap;
 326         fields[0].num_bits = 32;
 327         fields[0].out_value = malloc(4);
 328         buf_set_u32(fields[0].out_value, 0, 32, value);
 329         fields[0].in_value = NULL;
 330
 331         fields[1].tap = etb_reg->etb->tap;
 332         fields[1].num_bits = 7;
 333         fields[1].out_value = malloc(1);
 334         buf_set_u32(fields[1].out_value, 0, 7, reg_addr);
 335         fields[1].in_value = NULL;
 336
 337         fields[2].tap = etb_reg->etb->tap;
 338         fields[2].num_bits = 1;
 339         fields[2].out_value = malloc(1);
 340         buf_set_u32(fields[2].out_value, 0, 1, 1);
 341
 342         fields[2].in_value = NULL;
 343
 344         free(fields[0].out_value);
 345         free(fields[1].out_value);
 346         free(fields[2].out_value);
 347
 348         return ERROR_OK;
 349 }
 350
 351 COMMAND_HANDLER(handle_etb_config_command)
 352 {
 353         struct target *target;
 354         struct jtag_tap *tap;
 355         struct arm *arm;
 356
 357         if (CMD_ARGC != 2)
 358         {
 359                 return ERROR_COMMAND_SYNTAX_ERROR;
 360         }
 361
 362         target = get_target(CMD_ARGV[0]);
 363
 364         if (!target)
 365         {
 366                 LOG_ERROR("ETB: target '%s' not defined", CMD_ARGV[0]);
 367                 return ERROR_FAIL;
 368         }
 369
 370         arm = target_to_arm(target);
 371         if (!is_arm(arm))
 372         {
 373                 command_print(CMD_CTX, "ETB: '%s' isn't an ARM", CMD_ARGV[0]);
 374                 return ERROR_FAIL;
 375         }
 376
 377         tap = jtag_tap_by_string(CMD_ARGV[1]);
 378         if (tap == NULL)
 379         {
 380                 command_print(CMD_CTX, "ETB: TAP %s does not exist", CMD_ARGV[1]);
 381                 return ERROR_FAIL;
 382         }
 383
 384         if (arm->etm)
 385         {
 386                 struct etb *etb = malloc(sizeof(struct etb));
 387
 388                 arm->etm->capture_driver_priv = etb;
 389
 390                 etb->tap  = tap;
 391                 etb->cur_scan_chain = 0xffffffff;
 392                 etb->reg_cache = NULL;
 393                 etb->ram_width = 0;
 394                 etb->ram_depth = 0;
 395         }
 396         else
 397         {
 398                 LOG_ERROR("ETM: target has no ETM defined, ETB left unconfigured");
 399                 return ERROR_FAIL;
 400         }
 401
 402         return ERROR_OK;
 403 }
 404
 405 COMMAND_HANDLER(handle_etb_trigger_percent_command)
 406 {
 407         struct target *target;
 408         struct arm *arm;
 409         struct etm_context *etm;
 410         struct etb *etb;
 411
 412         target = get_current_target(CMD_CTX);
 413         arm = target_to_arm(target);
 414         if (!is_arm(arm))
 415         {
 416                 command_print(CMD_CTX, "ETB: current target isn't an ARM");
 417                 return ERROR_FAIL;
 418         }
 419
 420         etm = arm->etm;
 421         if (!etm) {
 422                 command_print(CMD_CTX, "ETB: target has no ETM configured");
 423                 return ERROR_FAIL;
 424         }
 425         if (etm->capture_driver != &etb_capture_driver) {
 426                 command_print(CMD_CTX, "ETB: target not using ETB");
 427                 return ERROR_FAIL;
 428         }
 429         etb = arm->etm->capture_driver_priv;
 430
 431         if (CMD_ARGC > 0) {
 432                 uint32_t new_value;
 433
 434                 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], new_value);
 435                 if ((new_value < 2) || (new_value > 100))
 436                         command_print(CMD_CTX,
 437                                 "valid percentages are 2%% to 100%%");
 438                 else
 439                         etb->trigger_percent = (unsigned) new_value;
 440         }
 441
 442         command_print(CMD_CTX, "%d percent of tracebuffer fills after trigger",
 443                         etb->trigger_percent);
 444
 445         return ERROR_OK;
 446 }
 447
 448 static const struct command_registration etb_config_command_handlers[] = {
 449         {
 450                 .name = "config",
 451                 .handler = &handle_etb_config_command,
 452                 .mode = COMMAND_CONFIG,
 453                 .usage = "target tap",
 454         },
 455         {
 456                 .name = "trigger_percent",
 457                 .handler = &handle_etb_trigger_percent_command,
 458                 .mode = COMMAND_EXEC,
 459                 .help = "percent of trace buffer to be filled "
 460                         "after the trigger occurs",
 461                 .usage = "[percent]",
 462         },
 463         COMMAND_REGISTRATION_DONE
 464 };
 465 static const struct command_registration etb_command_handlers[] = {
 466         {
 467                 .name = "etb",
 468                 .mode = COMMAND_ANY,
 469                 .help = "Emebdded Trace Buffer command group",
 470                 .chain = etb_config_command_handlers,
 471         },
 472         COMMAND_REGISTRATION_DONE
 473 };
 474
 475 static int etb_init(struct etm_context *etm_ctx)
 476 {
 477         struct etb *etb = etm_ctx->capture_driver_priv;
 478
 479         etb->etm_ctx = etm_ctx;
 480
 481         /* identify ETB RAM depth and width */
 482         etb_read_reg(&etb->reg_cache->reg_list[ETB_RAM_DEPTH]);
 483         etb_read_reg(&etb->reg_cache->reg_list[ETB_RAM_WIDTH]);
 484         jtag_execute_queue();
 485
 486         etb->ram_depth = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_DEPTH].value, 0, 32);
 487         etb->ram_width = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_WIDTH].value, 0, 32);
 488
 489         etb->trigger_percent = 50;
 490
 491         return ERROR_OK;
 492 }
 493
 494 static trace_status_t etb_status(struct etm_context *etm_ctx)
 495 {
 496         struct etb *etb = etm_ctx->capture_driver_priv;
 497         struct reg *control = &etb->reg_cache->reg_list[ETB_CTRL];
 498         struct reg *status = &etb->reg_cache->reg_list[ETB_STATUS];
 499         trace_status_t retval = 0;
 500         int etb_timeout = 100;
 501
 502         etb->etm_ctx = etm_ctx;
 503
 504         /* read control and status registers */
 505         etb_read_reg(control);
 506         etb_read_reg(status);
 507         jtag_execute_queue();
 508
 509         /* See if it's (still) active */
 510         retval = buf_get_u32(control->value, 0, 1) ? TRACE_RUNNING : TRACE_IDLE;
 511
 512         /* check Full bit to identify wraparound/overflow */
 513         if (buf_get_u32(status->value, 0, 1) == 1)
 514                 retval |= TRACE_OVERFLOWED;
 515
 516         /* check Triggered bit to identify trigger condition */
 517         if (buf_get_u32(status->value, 1, 1) == 1)
 518                 retval |= TRACE_TRIGGERED;
 519
 520         /* check AcqComp to see if trigger counter dropped to zero */
 521         if (buf_get_u32(status->value, 2, 1) == 1) {
 522                 /* wait for DFEmpty */
 523                 while (etb_timeout-- && buf_get_u32(status->value, 3, 1) == 0)
 524                         etb_get_reg(status);
 525
 526                 if (etb_timeout == 0)
 527                         LOG_ERROR("ETB:  DFEmpty won't go high, status 0x%02x",
 528                                 (unsigned) buf_get_u32(status->value, 0, 4));
 529
 530                 if (!(etm_ctx->capture_status & TRACE_TRIGGERED))
 531                         LOG_WARNING("ETB: trace complete without triggering?");
 532
 533                 retval |= TRACE_COMPLETED;
 534         }
 535
 536         /* NOTE: using a trigger is optional; and at least ETB11 has a mode
 537          * where it can ignore the trigger counter.
 538          */
 539
 540         /* update recorded state */
 541         etm_ctx->capture_status = retval;
 542
 543         return retval;
 544 }
 545
 546 static int etb_read_trace(struct etm_context *etm_ctx)
 547 {
 548         struct etb *etb = etm_ctx->capture_driver_priv;
 549         int first_frame = 0;
 550         int num_frames = etb->ram_depth;
 551         uint32_t *trace_data = NULL;
 552         int i, j;
 553
 554         etb_read_reg(&etb->reg_cache->reg_list[ETB_STATUS]);
 555         etb_read_reg(&etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER]);
 556         jtag_execute_queue();
 557
 558         /* check if we overflowed, and adjust first frame of the trace accordingly
 559          * if we didn't overflow, read only up to the frame that would be written next,
 560          * i.e. don't read invalid entries
 561          */
 562         if (buf_get_u32(etb->reg_cache->reg_list[ETB_STATUS].value, 0, 1))
 563         {
 564                 first_frame = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER].value, 0, 32);
 565         }
 566         else
 567         {
 568                 num_frames = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER].value, 0, 32);
 569         }
 570
 571         etb_write_reg(&etb->reg_cache->reg_list[ETB_RAM_READ_POINTER], first_frame);
 572
 573         /* read data into temporary array for unpacking */
 574         trace_data = malloc(sizeof(uint32_t) * num_frames);
 575         etb_read_ram(etb, trace_data, num_frames);
 576
 577         if (etm_ctx->trace_depth > 0)
 578         {
 579                 free(etm_ctx->trace_data);
 580         }
 581
 582         if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_4BIT)
 583                 etm_ctx->trace_depth = num_frames * 3;
 584         else if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
 585                 etm_ctx->trace_depth = num_frames * 2;
 586         else
 587                 etm_ctx->trace_depth = num_frames;
 588
 589         etm_ctx->trace_data = malloc(sizeof(struct etmv1_trace_data) * etm_ctx->trace_depth);
 590
 591         for (i = 0, j = 0; i < num_frames; i++)
 592         {
 593                 if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_4BIT)
 594                 {
 595                         /* trace word j */
 596                         etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
 597                         etm_ctx->trace_data[j].packet = (trace_data[i] & 0x78) >> 3;
 598                         etm_ctx->trace_data[j].flags = 0;
 599                         if ((trace_data[i] & 0x80) >> 7)
 600                         {
 601                                 etm_ctx->trace_data[j].flags |= ETMV1_TRACESYNC_CYCLE;
 602                         }
 603                         if (etm_ctx->trace_data[j].pipestat == STAT_TR)
 604                         {
 605                                 etm_ctx->trace_data[j].pipestat = etm_ctx->trace_data[j].packet & 0x7;
 606                                 etm_ctx->trace_data[j].flags |= ETMV1_TRIGGER_CYCLE;
 607                         }
 608
 609                         /* trace word j + 1 */
 610                         etm_ctx->trace_data[j + 1].pipestat = (trace_data[i] & 0x100) >> 8;
 611                         etm_ctx->trace_data[j + 1].packet = (trace_data[i] & 0x7800) >> 11;
 612                         etm_ctx->trace_data[j + 1].flags = 0;
 613                         if ((trace_data[i] & 0x8000) >> 15)
 614                         {
 615                                 etm_ctx->trace_data[j + 1].flags |= ETMV1_TRACESYNC_CYCLE;
 616                         }
 617                         if (etm_ctx->trace_data[j + 1].pipestat == STAT_TR)
 618                         {
 619                                 etm_ctx->trace_data[j + 1].pipestat = etm_ctx->trace_data[j + 1].packet & 0x7;
 620                                 etm_ctx->trace_data[j + 1].flags |= ETMV1_TRIGGER_CYCLE;
 621                         }
 622
 623                         /* trace word j + 2 */
 624                         etm_ctx->trace_data[j + 2].pipestat = (trace_data[i] & 0x10000) >> 16;
 625                         etm_ctx->trace_data[j + 2].packet = (trace_data[i] & 0x780000) >> 19;
 626                         etm_ctx->trace_data[j + 2].flags = 0;
 627                         if ((trace_data[i] & 0x800000) >> 23)
 628                         {
 629                                 etm_ctx->trace_data[j + 2].flags |= ETMV1_TRACESYNC_CYCLE;
 630                         }
 631                         if (etm_ctx->trace_data[j + 2].pipestat == STAT_TR)
 632                         {
 633                                 etm_ctx->trace_data[j + 2].pipestat = etm_ctx->trace_data[j + 2].packet & 0x7;
 634                                 etm_ctx->trace_data[j + 2].flags |= ETMV1_TRIGGER_CYCLE;
 635                         }
 636
 637                         j += 3;
 638                 }
 639                 else if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
 640                 {
 641                         /* trace word j */
 642                         etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
 643                         etm_ctx->trace_data[j].packet = (trace_data[i] & 0x7f8) >> 3;
 644                         etm_ctx->trace_data[j].flags = 0;
 645                         if ((trace_data[i] & 0x800) >> 11)
 646                         {
 647                                 etm_ctx->trace_data[j].flags |= ETMV1_TRACESYNC_CYCLE;
 648                         }
 649                         if (etm_ctx->trace_data[j].pipestat == STAT_TR)
 650                         {
 651                                 etm_ctx->trace_data[j].pipestat = etm_ctx->trace_data[j].packet & 0x7;
 652                                 etm_ctx->trace_data[j].flags |= ETMV1_TRIGGER_CYCLE;
 653                         }
 654
 655                         /* trace word j + 1 */
 656                         etm_ctx->trace_data[j + 1].pipestat = (trace_data[i] & 0x7000) >> 12;
 657                         etm_ctx->trace_data[j + 1].packet = (trace_data[i] & 0x7f8000) >> 15;
 658                         etm_ctx->trace_data[j + 1].flags = 0;
 659                         if ((trace_data[i] & 0x800000) >> 23)
 660                         {
 661                                 etm_ctx->trace_data[j + 1].flags |= ETMV1_TRACESYNC_CYCLE;
 662                         }
 663                         if (etm_ctx->trace_data[j + 1].pipestat == STAT_TR)
 664                         {
 665                                 etm_ctx->trace_data[j + 1].pipestat = etm_ctx->trace_data[j + 1].packet & 0x7;
 666                                 etm_ctx->trace_data[j + 1].flags |= ETMV1_TRIGGER_CYCLE;
 667                         }
 668
 669                         j += 2;
 670                 }
 671                 else
 672                 {
 673                         /* trace word j */
 674                         etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
 675                         etm_ctx->trace_data[j].packet = (trace_data[i] & 0x7fff8) >> 3;
 676                         etm_ctx->trace_data[j].flags = 0;
 677                         if ((trace_data[i] & 0x80000) >> 19)
 678                         {
 679                                 etm_ctx->trace_data[j].flags |= ETMV1_TRACESYNC_CYCLE;
 680                         }
 681                         if (etm_ctx->trace_data[j].pipestat == STAT_TR)
 682                         {
 683                                 etm_ctx->trace_data[j].pipestat = etm_ctx->trace_data[j].packet & 0x7;
 684                                 etm_ctx->trace_data[j].flags |= ETMV1_TRIGGER_CYCLE;
 685                         }
 686
 687                         j += 1;
 688                 }
 689         }
 690
 691         free(trace_data);
 692
 693         return ERROR_OK;
 694 }
 695
 696 static int etb_start_capture(struct etm_context *etm_ctx)
 697 {
 698         struct etb *etb = etm_ctx->capture_driver_priv;
 699         uint32_t etb_ctrl_value = 0x1;
 700         uint32_t trigger_count;
 701
 702         if ((etm_ctx->control & ETM_PORT_MODE_MASK) == ETM_PORT_DEMUXED)
 703         {
 704                 if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) != ETM_PORT_8BIT)
 705                 {
 706                         LOG_ERROR("ETB can't run in demultiplexed mode with a 4 or 16 bit port");
 707                         return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
 708                 }
 709                 etb_ctrl_value |= 0x2;
 710         }
 711
 712         if ((etm_ctx->control & ETM_PORT_MODE_MASK) == ETM_PORT_MUXED) {
 713                 LOG_ERROR("ETB: can't run in multiplexed mode");
 714                 return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
 715         }
 716
 717         trigger_count = (etb->ram_depth * etb->trigger_percent) / 100;
 718
 719         etb_write_reg(&etb->reg_cache->reg_list[ETB_TRIGGER_COUNTER], trigger_count);
 720         etb_write_reg(&etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER], 0x0);
 721         etb_write_reg(&etb->reg_cache->reg_list[ETB_CTRL], etb_ctrl_value);
 722         jtag_execute_queue();
 723
 724         /* we're starting a new trace, initialize capture status */
 725         etm_ctx->capture_status = TRACE_RUNNING;
 726
 727         return ERROR_OK;
 728 }
 729
 730 static int etb_stop_capture(struct etm_context *etm_ctx)
 731 {
 732         struct etb *etb = etm_ctx->capture_driver_priv;
 733         struct reg *etb_ctrl_reg = &etb->reg_cache->reg_list[ETB_CTRL];
 734
 735         etb_write_reg(etb_ctrl_reg, 0x0);
 736         jtag_execute_queue();
 737
 738         /* trace stopped, just clear running flag, but preserve others */
 739         etm_ctx->capture_status &= ~TRACE_RUNNING;
 740
 741         return ERROR_OK;
 742 }
 743
 744 struct etm_capture_driver etb_capture_driver =
 745 {
 746         .name = "etb",
 747         .commands = etb_command_handlers,
 748         .init = etb_init,
 749         .status = etb_status,
 750         .start_capture = etb_start_capture,
 751         .stop_capture = etb_stop_capture,
 752         .read_trace = etb_read_trace,
 753 };