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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, see <http://www.gnu.org/licenses/>. *
  17  ***************************************************************************/
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #include "arm.h"
  24 #include "etm.h"
  25 #include "etb.h"
  26 #include "register.h"
  27
  28 static const char * const etb_reg_list[] = {
  29         "ETB_identification",
  30         "ETB_ram_depth",
  31         "ETB_ram_width",
  32         "ETB_status",
  33         "ETB_ram_data",
  34         "ETB_ram_read_pointer",
  35         "ETB_ram_write_pointer",
  36         "ETB_trigger_counter",
  37         "ETB_control",
  38 };
  39
  40 static int etb_get_reg(struct reg *reg);
  41
  42 static int etb_set_instr(struct etb *etb, uint32_t new_instr)
  43 {
  44         struct jtag_tap *tap;
  45
  46         tap = etb->tap;
  47         if (!tap)
  48                 return ERROR_FAIL;
  49
  50         if (buf_get_u32(tap->cur_instr, 0, tap->ir_length) != new_instr) {
  51                 struct scan_field field;
  52
  53                 field.num_bits = tap->ir_length;
  54                 void *t = calloc(DIV_ROUND_UP(field.num_bits, 8), 1);
  55                 field.out_value = t;
  56                 buf_set_u32(t, 0, field.num_bits, new_instr);
  57
  58                 field.in_value = NULL;
  59
  60                 jtag_add_ir_scan(tap, &field, TAP_IDLE);
  61
  62                 free(t);
  63         }
  64
  65         return ERROR_OK;
  66 }
  67
  68 static int etb_scann(struct etb *etb, uint32_t new_scan_chain)
  69 {
  70         if (etb->cur_scan_chain != new_scan_chain) {
  71                 struct scan_field field;
  72
  73                 field.num_bits = 5;
  74                 void *t = calloc(DIV_ROUND_UP(field.num_bits, 8), 1);
  75                 field.out_value = t;
  76                 buf_set_u32(t, 0, field.num_bits, new_scan_chain);
  77
  78                 field.in_value = NULL;
  79
  80                 /* select INTEST instruction */
  81                 etb_set_instr(etb, 0x2);
  82                 jtag_add_dr_scan(etb->tap, 1, &field, TAP_IDLE);
  83
  84                 etb->cur_scan_chain = new_scan_chain;
  85
  86                 free(t);
  87         }
  88
  89         return ERROR_OK;
  90 }
  91
  92 static int etb_read_reg_w_check(struct reg *, uint8_t *, uint8_t *);
  93 static int etb_set_reg_w_exec(struct reg *, uint8_t *);
  94
  95 static int etb_read_reg(struct reg *reg)
  96 {
  97         return etb_read_reg_w_check(reg, NULL, NULL);
  98 }
  99
 100 static int etb_get_reg(struct reg *reg)
 101 {
 102         int retval;
 103
 104         retval = etb_read_reg(reg);
 105         if (retval != ERROR_OK) {
 106                 LOG_ERROR("BUG: error scheduling ETB register read");
 107                 return retval;
 108         }
 109
 110         retval = jtag_execute_queue();
 111         if (retval != ERROR_OK) {
 112                 LOG_ERROR("ETB register read failed");
 113                 return retval;
 114         }
 115
 116         return ERROR_OK;
 117 }
 118
 119 static const struct reg_arch_type etb_reg_type = {
 120         .get = etb_get_reg,
 121         .set = etb_set_reg_w_exec,
 122 };
 123
 124 struct reg_cache *etb_build_reg_cache(struct etb *etb)
 125 {
 126         struct reg_cache *reg_cache = malloc(sizeof(struct reg_cache));
 127         struct reg *reg_list = NULL;
 128         struct etb_reg *arch_info = NULL;
 129         int num_regs = 9;
 130         int i;
 131
 132         /* the actual registers are kept in two arrays */
 133         reg_list = calloc(num_regs, sizeof(struct reg));
 134         arch_info = calloc(num_regs, sizeof(struct etb_reg));
 135
 136         /* fill in values for the reg cache */
 137         reg_cache->name = "etb registers";
 138         reg_cache->next = NULL;
 139         reg_cache->reg_list = reg_list;
 140         reg_cache->num_regs = num_regs;
 141
 142         /* set up registers */
 143         for (i = 0; i < num_regs; i++) {
 144                 reg_list[i].name = etb_reg_list[i];
 145                 reg_list[i].size = 32;
 146                 reg_list[i].dirty = false;
 147                 reg_list[i].valid = false;
 148                 reg_list[i].value = calloc(1, 4);
 149                 reg_list[i].arch_info = &arch_info[i];
 150                 reg_list[i].type = &etb_reg_type;
 151                 reg_list[i].size = 32;
 152                 arch_info[i].addr = i;
 153                 arch_info[i].etb = etb;
 154         }
 155
 156         return reg_cache;
 157 }
 158
 159 static void etb_getbuf(jtag_callback_data_t arg)
 160 {
 161         uint8_t *in = (uint8_t *)arg;
 162
 163         *((uint32_t *)arg) = buf_get_u32(in, 0, 32);
 164 }
 165
 166 static int etb_read_ram(struct etb *etb, uint32_t *data, int num_frames)
 167 {
 168         struct scan_field fields[3];
 169         int i;
 170
 171         etb_scann(etb, 0x0);
 172         etb_set_instr(etb, 0xc);
 173
 174         fields[0].num_bits = 32;
 175         fields[0].out_value = NULL;
 176         fields[0].in_value = NULL;
 177
 178         fields[1].num_bits = 7;
 179         uint8_t temp1 = 0;
 180         fields[1].out_value = &temp1;
 181         buf_set_u32(&temp1, 0, 7, 4);
 182         fields[1].in_value = NULL;
 183
 184         fields[2].num_bits = 1;
 185         uint8_t temp2 = 0;
 186         fields[2].out_value = &temp2;
 187         buf_set_u32(&temp2, 0, 1, 0);
 188         fields[2].in_value = NULL;
 189
 190         jtag_add_dr_scan(etb->tap, 3, fields, TAP_IDLE);
 191
 192         for (i = 0; i < num_frames; i++) {
 193                 /* ensure nR/W remains set to read */
 194                 buf_set_u32(&temp2, 0, 1, 0);
 195
 196                 /* address remains set to 0x4 (RAM data) until we read the last frame */
 197                 if (i < num_frames - 1)
 198                         buf_set_u32(&temp1, 0, 7, 4);
 199                 else
 200                         buf_set_u32(&temp1, 0, 7, 0);
 201
 202                 fields[0].in_value = (uint8_t *)(data + i);
 203                 jtag_add_dr_scan(etb->tap, 3, fields, TAP_IDLE);
 204
 205                 jtag_add_callback(etb_getbuf, (jtag_callback_data_t)(data + i));
 206         }
 207
 208         jtag_execute_queue();
 209
 210         return ERROR_OK;
 211 }
 212
 213 static int etb_read_reg_w_check(struct reg *reg,
 214         uint8_t *check_value, uint8_t *check_mask)
 215 {
 216         struct etb_reg *etb_reg = reg->arch_info;
 217         uint8_t reg_addr = etb_reg->addr & 0x7f;
 218         struct scan_field fields[3];
 219
 220         LOG_DEBUG("%i", (int)(etb_reg->addr));
 221
 222         etb_scann(etb_reg->etb, 0x0);
 223         etb_set_instr(etb_reg->etb, 0xc);
 224
 225         fields[0].num_bits = 32;
 226         fields[0].out_value = reg->value;
 227         fields[0].in_value = NULL;
 228         fields[0].check_value = NULL;
 229         fields[0].check_mask = NULL;
 230
 231         fields[1].num_bits = 7;
 232         uint8_t temp1 = 0;
 233         fields[1].out_value = &temp1;
 234         buf_set_u32(&temp1, 0, 7, reg_addr);
 235         fields[1].in_value = NULL;
 236         fields[1].check_value = NULL;
 237         fields[1].check_mask = NULL;
 238
 239         fields[2].num_bits = 1;
 240         uint8_t temp2 = 0;
 241         fields[2].out_value = &temp2;
 242         buf_set_u32(&temp2, 0, 1, 0);
 243         fields[2].in_value = NULL;
 244         fields[2].check_value = NULL;
 245         fields[2].check_mask = NULL;
 246
 247         jtag_add_dr_scan(etb_reg->etb->tap, 3, fields, TAP_IDLE);
 248
 249         /* read the identification register in the second run, to make sure we
 250          * don't read the ETB data register twice, skipping every second entry
 251          */
 252         buf_set_u32(&temp1, 0, 7, 0x0);
 253         fields[0].in_value = reg->value;
 254         fields[0].check_value = check_value;
 255         fields[0].check_mask = check_mask;
 256
 257         jtag_add_dr_scan_check(etb_reg->etb->tap, 3, fields, TAP_IDLE);
 258
 259         return ERROR_OK;
 260 }
 261
 262 static int etb_write_reg(struct reg *, uint32_t);
 263
 264 static int etb_set_reg(struct reg *reg, uint32_t value)
 265 {
 266         int retval;
 267
 268         retval = etb_write_reg(reg, value);
 269         if (retval != ERROR_OK) {
 270                 LOG_ERROR("BUG: error scheduling ETB register write");
 271                 return retval;
 272         }
 273
 274         buf_set_u32(reg->value, 0, reg->size, value);
 275         reg->valid = true;
 276         reg->dirty = false;
 277
 278         return ERROR_OK;
 279 }
 280
 281 static int etb_set_reg_w_exec(struct reg *reg, uint8_t *buf)
 282 {
 283         int retval;
 284
 285         etb_set_reg(reg, buf_get_u32(buf, 0, reg->size));
 286
 287         retval = jtag_execute_queue();
 288         if (retval != ERROR_OK) {
 289                 LOG_ERROR("ETB: register write failed");
 290                 return retval;
 291         }
 292         return ERROR_OK;
 293 }
 294
 295 static int etb_write_reg(struct reg *reg, uint32_t value)
 296 {
 297         struct etb_reg *etb_reg = reg->arch_info;
 298         uint8_t reg_addr = etb_reg->addr & 0x7f;
 299         struct scan_field fields[3];
 300
 301         LOG_DEBUG("%i: 0x%8.8" PRIx32 "", (int)(etb_reg->addr), value);
 302
 303         etb_scann(etb_reg->etb, 0x0);
 304         etb_set_instr(etb_reg->etb, 0xc);
 305
 306         fields[0].num_bits = 32;
 307         uint8_t temp0[4];
 308         fields[0].out_value = temp0;
 309         buf_set_u32(temp0, 0, 32, value);
 310         fields[0].in_value = NULL;
 311
 312         fields[1].num_bits = 7;
 313         uint8_t temp1 = 0;
 314         fields[1].out_value = &temp1;
 315         buf_set_u32(&temp1, 0, 7, reg_addr);
 316         fields[1].in_value = NULL;
 317
 318         fields[2].num_bits = 1;
 319         uint8_t temp2 = 0;
 320         fields[2].out_value = &temp2;
 321         buf_set_u32(&temp2, 0, 1, 1);
 322         fields[2].in_value = NULL;
 323
 324         jtag_add_dr_scan(etb_reg->etb->tap, 3, fields, TAP_IDLE);
 325
 326         return ERROR_OK;
 327 }
 328
 329 COMMAND_HANDLER(handle_etb_config_command)
 330 {
 331         struct target *target;
 332         struct jtag_tap *tap;
 333         struct arm *arm;
 334
 335         if (CMD_ARGC != 2)
 336                 return ERROR_COMMAND_SYNTAX_ERROR;
 337
 338         target = get_target(CMD_ARGV[0]);
 339
 340         if (!target) {
 341                 LOG_ERROR("ETB: target '%s' not defined", CMD_ARGV[0]);
 342                 return ERROR_FAIL;
 343         }
 344
 345         arm = target_to_arm(target);
 346         if (!is_arm(arm)) {
 347                 command_print(CMD, "ETB: '%s' isn't an ARM", CMD_ARGV[0]);
 348                 return ERROR_FAIL;
 349         }
 350
 351         tap = jtag_tap_by_string(CMD_ARGV[1]);
 352         if (!tap) {
 353                 command_print(CMD, "ETB: TAP %s does not exist", CMD_ARGV[1]);
 354                 return ERROR_FAIL;
 355         }
 356
 357         if (arm->etm) {
 358                 struct etb *etb = malloc(sizeof(struct etb));
 359
 360                 arm->etm->capture_driver_priv = etb;
 361
 362                 etb->tap  = tap;
 363                 etb->cur_scan_chain = 0xffffffff;
 364                 etb->reg_cache = NULL;
 365                 etb->ram_width = 0;
 366                 etb->ram_depth = 0;
 367         } else {
 368                 LOG_ERROR("ETM: target has no ETM defined, ETB left unconfigured");
 369                 return ERROR_FAIL;
 370         }
 371
 372         return ERROR_OK;
 373 }
 374
 375 COMMAND_HANDLER(handle_etb_trigger_percent_command)
 376 {
 377         struct target *target;
 378         struct arm *arm;
 379         struct etm_context *etm;
 380         struct etb *etb;
 381
 382         target = get_current_target(CMD_CTX);
 383         arm = target_to_arm(target);
 384         if (!is_arm(arm)) {
 385                 command_print(CMD, "ETB: current target isn't an ARM");
 386                 return ERROR_FAIL;
 387         }
 388
 389         etm = arm->etm;
 390         if (!etm) {
 391                 command_print(CMD, "ETB: target has no ETM configured");
 392                 return ERROR_FAIL;
 393         }
 394         if (etm->capture_driver != &etb_capture_driver) {
 395                 command_print(CMD, "ETB: target not using ETB");
 396                 return ERROR_FAIL;
 397         }
 398         etb = arm->etm->capture_driver_priv;
 399
 400         if (CMD_ARGC > 0) {
 401                 uint32_t new_value;
 402
 403                 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], new_value);
 404                 if ((new_value < 2) || (new_value > 100))
 405                         command_print(CMD,
 406                                 "valid percentages are 2%% to 100%%");
 407                 else
 408                         etb->trigger_percent = (unsigned) new_value;
 409         }
 410
 411         command_print(CMD, "%d percent of tracebuffer fills after trigger",
 412                 etb->trigger_percent);
 413
 414         return ERROR_OK;
 415 }
 416
 417 static const struct command_registration etb_config_command_handlers[] = {
 418         {
 419                 /* NOTE:  with ADIv5, ETBs are accessed using DAP operations,
 420                  * possibly over SWD, not through separate TAPs...
 421                  */
 422                 .name = "config",
 423                 .handler = handle_etb_config_command,
 424                 .mode = COMMAND_CONFIG,
 425                 .help = "Associate ETB with target and JTAG TAP.",
 426                 .usage = "target tap",
 427         },
 428         {
 429                 .name = "trigger_percent",
 430                 .handler = handle_etb_trigger_percent_command,
 431                 .mode = COMMAND_EXEC,
 432                 .help = "Set percent of trace buffer to be filled "
 433                         "after the trigger occurs (2..100).",
 434                 .usage = "[percent]",
 435         },
 436         COMMAND_REGISTRATION_DONE
 437 };
 438 static const struct command_registration etb_command_handlers[] = {
 439         {
 440                 .name = "etb",
 441                 .mode = COMMAND_ANY,
 442                 .help = "Embedded Trace Buffer command group",
 443                 .chain = etb_config_command_handlers,
 444                 .usage = "",
 445         },
 446         COMMAND_REGISTRATION_DONE
 447 };
 448
 449 static int etb_init(struct etm_context *etm_ctx)
 450 {
 451         struct etb *etb = etm_ctx->capture_driver_priv;
 452
 453         etb->etm_ctx = etm_ctx;
 454
 455         /* identify ETB RAM depth and width */
 456         etb_read_reg(&etb->reg_cache->reg_list[ETB_RAM_DEPTH]);
 457         etb_read_reg(&etb->reg_cache->reg_list[ETB_RAM_WIDTH]);
 458         jtag_execute_queue();
 459
 460         etb->ram_depth = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_DEPTH].value, 0, 32);
 461         etb->ram_width = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_WIDTH].value, 0, 32);
 462
 463         etb->trigger_percent = 50;
 464
 465         return ERROR_OK;
 466 }
 467
 468 static trace_status_t etb_status(struct etm_context *etm_ctx)
 469 {
 470         struct etb *etb = etm_ctx->capture_driver_priv;
 471         struct reg *control = &etb->reg_cache->reg_list[ETB_CTRL];
 472         struct reg *status = &etb->reg_cache->reg_list[ETB_STATUS];
 473         trace_status_t retval = 0;
 474         int etb_timeout = 100;
 475
 476         etb->etm_ctx = etm_ctx;
 477
 478         /* read control and status registers */
 479         etb_read_reg(control);
 480         etb_read_reg(status);
 481         jtag_execute_queue();
 482
 483         /* See if it's (still) active */
 484         retval = buf_get_u32(control->value, 0, 1) ? TRACE_RUNNING : TRACE_IDLE;
 485
 486         /* check Full bit to identify wraparound/overflow */
 487         if (buf_get_u32(status->value, 0, 1) == 1)
 488                 retval |= TRACE_OVERFLOWED;
 489
 490         /* check Triggered bit to identify trigger condition */
 491         if (buf_get_u32(status->value, 1, 1) == 1)
 492                 retval |= TRACE_TRIGGERED;
 493
 494         /* check AcqComp to see if trigger counter dropped to zero */
 495         if (buf_get_u32(status->value, 2, 1) == 1) {
 496                 /* wait for DFEmpty */
 497                 while (etb_timeout-- && buf_get_u32(status->value, 3, 1) == 0)
 498                         etb_get_reg(status);
 499
 500                 if (etb_timeout == 0)
 501                         LOG_ERROR("ETB:  DFEmpty won't go high, status 0x%02x",
 502                                 (unsigned) buf_get_u32(status->value, 0, 4));
 503
 504                 if (!(etm_ctx->capture_status & TRACE_TRIGGERED))
 505                         LOG_WARNING("ETB: trace complete without triggering?");
 506
 507                 retval |= TRACE_COMPLETED;
 508         }
 509
 510         /* NOTE: using a trigger is optional; and at least ETB11 has a mode
 511          * where it can ignore the trigger counter.
 512          */
 513
 514         /* update recorded state */
 515         etm_ctx->capture_status = retval;
 516
 517         return retval;
 518 }
 519
 520 static int etb_read_trace(struct etm_context *etm_ctx)
 521 {
 522         struct etb *etb = etm_ctx->capture_driver_priv;
 523         int first_frame = 0;
 524         int num_frames = etb->ram_depth;
 525         uint32_t *trace_data = NULL;
 526         int i, j;
 527
 528         etb_read_reg(&etb->reg_cache->reg_list[ETB_STATUS]);
 529         etb_read_reg(&etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER]);
 530         jtag_execute_queue();
 531
 532         /* check if we overflowed, and adjust first frame of the trace accordingly
 533          * if we didn't overflow, read only up to the frame that would be written next,
 534          * i.e. don't read invalid entries
 535          */
 536         if (buf_get_u32(etb->reg_cache->reg_list[ETB_STATUS].value, 0, 1))
 537                 first_frame = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER].value,
 538                                 0,
 539                                 32);
 540         else
 541                 num_frames = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER].value,
 542                                 0,
 543                                 32);
 544
 545         etb_write_reg(&etb->reg_cache->reg_list[ETB_RAM_READ_POINTER], first_frame);
 546
 547         /* read data into temporary array for unpacking */
 548         trace_data = malloc(sizeof(uint32_t) * num_frames);
 549         etb_read_ram(etb, trace_data, num_frames);
 550
 551         if (etm_ctx->trace_depth > 0)
 552                 free(etm_ctx->trace_data);
 553
 554         if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_4BIT)
 555                 etm_ctx->trace_depth = num_frames * 3;
 556         else if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
 557                 etm_ctx->trace_depth = num_frames * 2;
 558         else
 559                 etm_ctx->trace_depth = num_frames;
 560
 561         etm_ctx->trace_data = malloc(sizeof(struct etmv1_trace_data) * etm_ctx->trace_depth);
 562
 563         for (i = 0, j = 0; i < num_frames; i++) {
 564                 if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_4BIT) {
 565                         /* trace word j */
 566                         etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
 567                         etm_ctx->trace_data[j].packet = (trace_data[i] & 0x78) >> 3;
 568                         etm_ctx->trace_data[j].flags = 0;
 569                         if ((trace_data[i] & 0x80) >> 7)
 570                                 etm_ctx->trace_data[j].flags |= ETMV1_TRACESYNC_CYCLE;
 571                         if (etm_ctx->trace_data[j].pipestat == STAT_TR) {
 572                                 etm_ctx->trace_data[j].pipestat = etm_ctx->trace_data[j].packet &
 573                                         0x7;
 574                                 etm_ctx->trace_data[j].flags |= ETMV1_TRIGGER_CYCLE;
 575                         }
 576
 577                         /* trace word j + 1 */
 578                         etm_ctx->trace_data[j + 1].pipestat = (trace_data[i] & 0x100) >> 8;
 579                         etm_ctx->trace_data[j + 1].packet = (trace_data[i] & 0x7800) >> 11;
 580                         etm_ctx->trace_data[j + 1].flags = 0;
 581                         if ((trace_data[i] & 0x8000) >> 15)
 582                                 etm_ctx->trace_data[j + 1].flags |= ETMV1_TRACESYNC_CYCLE;
 583                         if (etm_ctx->trace_data[j + 1].pipestat == STAT_TR) {
 584                                 etm_ctx->trace_data[j +
 585                                 1].pipestat = etm_ctx->trace_data[j + 1].packet & 0x7;
 586                                 etm_ctx->trace_data[j + 1].flags |= ETMV1_TRIGGER_CYCLE;
 587                         }
 588
 589                         /* trace word j + 2 */
 590                         etm_ctx->trace_data[j + 2].pipestat = (trace_data[i] & 0x10000) >> 16;
 591                         etm_ctx->trace_data[j + 2].packet = (trace_data[i] & 0x780000) >> 19;
 592                         etm_ctx->trace_data[j + 2].flags = 0;
 593                         if ((trace_data[i] & 0x800000) >> 23)
 594                                 etm_ctx->trace_data[j + 2].flags |= ETMV1_TRACESYNC_CYCLE;
 595                         if (etm_ctx->trace_data[j + 2].pipestat == STAT_TR) {
 596                                 etm_ctx->trace_data[j +
 597                                 2].pipestat = etm_ctx->trace_data[j + 2].packet & 0x7;
 598                                 etm_ctx->trace_data[j + 2].flags |= ETMV1_TRIGGER_CYCLE;
 599                         }
 600
 601                         j += 3;
 602                 } else if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT) {
 603                         /* trace word j */
 604                         etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
 605                         etm_ctx->trace_data[j].packet = (trace_data[i] & 0x7f8) >> 3;
 606                         etm_ctx->trace_data[j].flags = 0;
 607                         if ((trace_data[i] & 0x800) >> 11)
 608                                 etm_ctx->trace_data[j].flags |= ETMV1_TRACESYNC_CYCLE;
 609                         if (etm_ctx->trace_data[j].pipestat == STAT_TR) {
 610                                 etm_ctx->trace_data[j].pipestat = etm_ctx->trace_data[j].packet &
 611                                         0x7;
 612                                 etm_ctx->trace_data[j].flags |= ETMV1_TRIGGER_CYCLE;
 613                         }
 614
 615                         /* trace word j + 1 */
 616                         etm_ctx->trace_data[j + 1].pipestat = (trace_data[i] & 0x7000) >> 12;
 617                         etm_ctx->trace_data[j + 1].packet = (trace_data[i] & 0x7f8000) >> 15;
 618                         etm_ctx->trace_data[j + 1].flags = 0;
 619                         if ((trace_data[i] & 0x800000) >> 23)
 620                                 etm_ctx->trace_data[j + 1].flags |= ETMV1_TRACESYNC_CYCLE;
 621                         if (etm_ctx->trace_data[j + 1].pipestat == STAT_TR) {
 622                                 etm_ctx->trace_data[j +
 623                                 1].pipestat = etm_ctx->trace_data[j + 1].packet & 0x7;
 624                                 etm_ctx->trace_data[j + 1].flags |= ETMV1_TRIGGER_CYCLE;
 625                         }
 626
 627                         j += 2;
 628                 } else {
 629                         /* trace word j */
 630                         etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
 631                         etm_ctx->trace_data[j].packet = (trace_data[i] & 0x7fff8) >> 3;
 632                         etm_ctx->trace_data[j].flags = 0;
 633                         if ((trace_data[i] & 0x80000) >> 19)
 634                                 etm_ctx->trace_data[j].flags |= ETMV1_TRACESYNC_CYCLE;
 635                         if (etm_ctx->trace_data[j].pipestat == STAT_TR) {
 636                                 etm_ctx->trace_data[j].pipestat = etm_ctx->trace_data[j].packet &
 637                                         0x7;
 638                                 etm_ctx->trace_data[j].flags |= ETMV1_TRIGGER_CYCLE;
 639                         }
 640
 641                         j += 1;
 642                 }
 643         }
 644
 645         free(trace_data);
 646
 647         return ERROR_OK;
 648 }
 649
 650 static int etb_start_capture(struct etm_context *etm_ctx)
 651 {
 652         struct etb *etb = etm_ctx->capture_driver_priv;
 653         uint32_t etb_ctrl_value = 0x1;
 654         uint32_t trigger_count;
 655
 656         if ((etm_ctx->control & ETM_PORT_MODE_MASK) == ETM_PORT_DEMUXED) {
 657                 if ((etm_ctx->control & ETM_PORT_WIDTH_MASK) != ETM_PORT_8BIT) {
 658                         LOG_ERROR("ETB can't run in demultiplexed mode with a 4 or 16 bit port");
 659                         return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
 660                 }
 661                 etb_ctrl_value |= 0x2;
 662         }
 663
 664         if ((etm_ctx->control & ETM_PORT_MODE_MASK) == ETM_PORT_MUXED) {
 665                 LOG_ERROR("ETB: can't run in multiplexed mode");
 666                 return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
 667         }
 668
 669         trigger_count = (etb->ram_depth * etb->trigger_percent) / 100;
 670
 671         etb_write_reg(&etb->reg_cache->reg_list[ETB_TRIGGER_COUNTER], trigger_count);
 672         etb_write_reg(&etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER], 0x0);
 673         etb_write_reg(&etb->reg_cache->reg_list[ETB_CTRL], etb_ctrl_value);
 674         jtag_execute_queue();
 675
 676         /* we're starting a new trace, initialize capture status */
 677         etm_ctx->capture_status = TRACE_RUNNING;
 678
 679         return ERROR_OK;
 680 }
 681
 682 static int etb_stop_capture(struct etm_context *etm_ctx)
 683 {
 684         struct etb *etb = etm_ctx->capture_driver_priv;
 685         struct reg *etb_ctrl_reg = &etb->reg_cache->reg_list[ETB_CTRL];
 686
 687         etb_write_reg(etb_ctrl_reg, 0x0);
 688         jtag_execute_queue();
 689
 690         /* trace stopped, just clear running flag, but preserve others */
 691         etm_ctx->capture_status &= ~TRACE_RUNNING;
 692
 693         return ERROR_OK;
 694 }
 695
 696 struct etm_capture_driver etb_capture_driver = {
 697         .name = "etb",
 698         .commands = etb_command_handlers,
 699         .init = etb_init,
 700         .status = etb_status,
 701         .start_capture = etb_start_capture,
 702         .stop_capture = etb_stop_capture,
 703         .read_trace = etb_read_trace,
 704 };