git.sur5r.net Git - openocd/blob - src/target/etb.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include <string.h>
  25
  26 #include "arm7_9_common.h"
  27 #include "etb.h"
  28 #include "etm.h"
  29
  30 #include "log.h"
  31 #include "types.h"
  32 #include "binarybuffer.h"
  33 #include "target.h"
  34 #include "register.h"
  35 #include "jtag.h"
  36
  37 #include <stdlib.h>
  38
  39 char* etb_reg_list[] =
  40 {
  41         "ETB_identification",
  42         "ETB_ram_depth",
  43         "ETB_ram_width",
  44         "ETB_status",
  45         "ETB_ram_data",
  46         "ETB_ram_read_pointer",
  47         "ETB_ram_write_pointer",
  48         "ETB_trigger_counter",
  49         "ETB_control",
  50 };
  51
  52 int etb_reg_arch_type = -1;
  53
  54 int etb_get_reg(reg_t *reg);
  55 int etb_set_reg(reg_t *reg, u32 value);
  56 int etb_set_reg_w_exec(reg_t *reg, u8 *buf);
  57
  58 int etb_write_reg(reg_t *reg, u32 value);
  59 int etb_read_reg(reg_t *reg);
  60
  61 int handle_etb_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  62
  63 int etb_set_instr(etb_t *etb, u32 new_instr)
  64 {
  65         jtag_device_t *device = jtag_get_device(etb->chain_pos);
  66
  67         if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr)
  68         {
  69                 scan_field_t field;
  70
  71                 field.device = etb->chain_pos;
  72                 field.num_bits = device->ir_length;
  73                 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
  74                 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
  75                 field.out_mask = NULL;
  76                 field.in_value = NULL;
  77                 field.in_check_value = NULL;
  78                 field.in_check_mask = NULL;
  79                 field.in_handler = NULL;
  80                 field.in_handler_priv = NULL;
  81
  82                 jtag_add_ir_scan(1, &field, -1);
  83
  84                 free(field.out_value);
  85         }
  86
  87         return ERROR_OK;
  88 }
  89
  90 int etb_scann(etb_t *etb, u32 new_scan_chain)
  91 {
  92         if(etb->cur_scan_chain != new_scan_chain)
  93         {
  94                 scan_field_t field;
  95
  96                 field.device = etb->chain_pos;
  97                 field.num_bits = 5;
  98                 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
  99                 buf_set_u32(field.out_value, 0, field.num_bits, new_scan_chain);
 100                 field.out_mask = NULL;
 101                 field.in_value = NULL;
 102                 field.in_check_value = NULL;
 103                 field.in_check_mask = NULL;
 104                 field.in_handler = NULL;
 105                 field.in_handler_priv = NULL;
 106
 107                 /* select INTEST instruction */
 108                 etb_set_instr(etb, 0x2);
 109                 jtag_add_dr_scan(1, &field, -1);
 110
 111                 etb->cur_scan_chain = new_scan_chain;
 112
 113                 free(field.out_value);
 114         }
 115
 116         return ERROR_OK;
 117 }
 118
 119 reg_cache_t* etb_build_reg_cache(etb_t *etb)
 120 {
 121         reg_cache_t *reg_cache = malloc(sizeof(reg_cache_t));
 122         reg_t *reg_list = NULL;
 123         etb_reg_t *arch_info = NULL;
 124         int num_regs = 9;
 125         int i;
 126
 127         /* register a register arch-type for etm registers only once */
 128         if (etb_reg_arch_type == -1)
 129                 etb_reg_arch_type = register_reg_arch_type(etb_get_reg, etb_set_reg_w_exec);
 130
 131         /* the actual registers are kept in two arrays */
 132         reg_list = calloc(num_regs, sizeof(reg_t));
 133         arch_info = calloc(num_regs, sizeof(etb_reg_t));
 134
 135         /* fill in values for the reg cache */
 136         reg_cache->name = "etb registers";
 137         reg_cache->next = NULL;
 138         reg_cache->reg_list = reg_list;
 139         reg_cache->num_regs = num_regs;
 140
 141         /* set up registers */
 142         for (i = 0; i < num_regs; i++)
 143         {
 144                 reg_list[i].name = etb_reg_list[i];
 145                 reg_list[i].size = 32;
 146                 reg_list[i].dirty = 0;
 147                 reg_list[i].valid = 0;
 148                 reg_list[i].bitfield_desc = NULL;
 149                 reg_list[i].num_bitfields = 0;
 150                 reg_list[i].value = calloc(1, 4);
 151                 reg_list[i].arch_info = &arch_info[i];
 152                 reg_list[i].arch_type = etb_reg_arch_type;
 153                 reg_list[i].size = 32;
 154                 arch_info[i].addr = i;
 155                 arch_info[i].etb = etb;
 156         }
 157
 158         return reg_cache;
 159 }
 160
 161 int etb_get_reg(reg_t *reg)
 162 {
 163         if (etb_read_reg(reg) != ERROR_OK)
 164         {
 165                 LOG_ERROR("BUG: error scheduling etm register read");
 166                 exit(-1);
 167         }
 168
 169         if (jtag_execute_queue() != ERROR_OK)
 170         {
 171                 LOG_ERROR("register read failed");
 172         }
 173
 174         return ERROR_OK;
 175 }
 176
 177 int etb_read_ram(etb_t *etb, u32 *data, int num_frames)
 178 {
 179         scan_field_t fields[3];
 180         int i;
 181
 182         jtag_add_end_state(TAP_RTI);
 183         etb_scann(etb, 0x0);
 184         etb_set_instr(etb, 0xc);
 185
 186         fields[0].device = etb->chain_pos;
 187         fields[0].num_bits = 32;
 188         fields[0].out_value = NULL;
 189         fields[0].out_mask = NULL;
 190         fields[0].in_value = NULL;
 191         fields[0].in_check_value = NULL;
 192         fields[0].in_check_mask = NULL;
 193         fields[0].in_handler = NULL;
 194         fields[0].in_handler_priv = NULL;
 195
 196         fields[1].device = etb->chain_pos;
 197         fields[1].num_bits = 7;
 198         fields[1].out_value = malloc(1);
 199         buf_set_u32(fields[1].out_value, 0, 7, 4);
 200         fields[1].out_mask = NULL;
 201         fields[1].in_value = NULL;
 202         fields[1].in_check_value = NULL;
 203         fields[1].in_check_mask = NULL;
 204         fields[1].in_handler = NULL;
 205         fields[1].in_handler_priv = NULL;
 206
 207         fields[2].device = etb->chain_pos;
 208         fields[2].num_bits = 1;
 209         fields[2].out_value = malloc(1);
 210         buf_set_u32(fields[2].out_value, 0, 1, 0);
 211         fields[2].out_mask = NULL;
 212         fields[2].in_value = NULL;
 213         fields[2].in_check_value = NULL;
 214         fields[2].in_check_mask = NULL;
 215         fields[2].in_handler = NULL;
 216         fields[2].in_handler_priv = NULL;
 217
 218         jtag_add_dr_scan(3, fields, -1);
 219
 220         fields[0].in_handler = buf_to_u32_handler;
 221
 222         for (i = 0; i < num_frames; i++)
 223         {
 224                 /* ensure nR/W reamins set to read */
 225                 buf_set_u32(fields[2].out_value, 0, 1, 0);
 226
 227                 /* address remains set to 0x4 (RAM data) until we read the last frame */
 228                 if (i < num_frames - 1)
 229                         buf_set_u32(fields[1].out_value, 0, 7, 4);
 230                 else
 231                         buf_set_u32(fields[1].out_value, 0, 7, 0);
 232
 233                 fields[0].in_handler_priv = &data[i];
 234                 jtag_add_dr_scan(3, fields, -1);
 235         }
 236
 237         jtag_execute_queue();
 238
 239         free(fields[1].out_value);
 240         free(fields[2].out_value);
 241
 242         return ERROR_OK;
 243 }
 244
 245 int etb_read_reg_w_check(reg_t *reg, u8* check_value, u8* check_mask)
 246 {
 247         etb_reg_t *etb_reg = reg->arch_info;
 248         u8 reg_addr = etb_reg->addr & 0x7f;
 249         scan_field_t fields[3];
 250
 251         LOG_DEBUG("%i", etb_reg->addr);
 252
 253         jtag_add_end_state(TAP_RTI);
 254         etb_scann(etb_reg->etb, 0x0);
 255         etb_set_instr(etb_reg->etb, 0xc);
 256
 257         fields[0].device = etb_reg->etb->chain_pos;
 258         fields[0].num_bits = 32;
 259         fields[0].out_value = reg->value;
 260         fields[0].out_mask = NULL;
 261         fields[0].in_value = NULL;
 262         fields[0].in_check_value = NULL;
 263         fields[0].in_check_mask = NULL;
 264         fields[0].in_handler = NULL;
 265         fields[0].in_handler_priv = NULL;
 266
 267         fields[1].device = etb_reg->etb->chain_pos;
 268         fields[1].num_bits = 7;
 269         fields[1].out_value = malloc(1);
 270         buf_set_u32(fields[1].out_value, 0, 7, reg_addr);
 271         fields[1].out_mask = NULL;
 272         fields[1].in_value = NULL;
 273         fields[1].in_check_value = NULL;
 274         fields[1].in_check_mask = NULL;
 275         fields[1].in_handler = NULL;
 276         fields[1].in_handler_priv = NULL;
 277
 278         fields[2].device = etb_reg->etb->chain_pos;
 279         fields[2].num_bits = 1;
 280         fields[2].out_value = malloc(1);
 281         buf_set_u32(fields[2].out_value, 0, 1, 0);
 282         fields[2].out_mask = NULL;
 283         fields[2].in_value = NULL;
 284         fields[2].in_check_value = NULL;
 285         fields[2].in_check_mask = NULL;
 286         fields[2].in_handler = NULL;
 287         fields[2].in_handler_priv = NULL;
 288
 289         jtag_add_dr_scan(3, fields, -1);
 290
 291         /* read the identification register in the second run, to make sure we
 292          * don't read the ETB data register twice, skipping every second entry
 293          */
 294         buf_set_u32(fields[1].out_value, 0, 7, 0x0);
 295         fields[0].in_value = reg->value;
 296
 297         jtag_set_check_value(fields+0, check_value, check_mask, NULL);
 298
 299         jtag_add_dr_scan(3, fields, -1);
 300
 301         free(fields[1].out_value);
 302         free(fields[2].out_value);
 303
 304         return ERROR_OK;
 305 }
 306
 307 int etb_read_reg(reg_t *reg)
 308 {
 309         return etb_read_reg_w_check(reg, NULL, NULL);
 310 }
 311
 312 int etb_set_reg(reg_t *reg, u32 value)
 313 {
 314         if (etb_write_reg(reg, value) != ERROR_OK)
 315         {
 316                 LOG_ERROR("BUG: error scheduling etm register write");
 317                 exit(-1);
 318         }
 319
 320         buf_set_u32(reg->value, 0, reg->size, value);
 321         reg->valid = 1;
 322         reg->dirty = 0;
 323
 324         return ERROR_OK;
 325 }
 326
 327 int etb_set_reg_w_exec(reg_t *reg, u8 *buf)
 328 {
 329         etb_set_reg(reg, buf_get_u32(buf, 0, reg->size));
 330
 331         if (jtag_execute_queue() != ERROR_OK)
 332         {
 333                 LOG_ERROR("register write failed");
 334                 exit(-1);
 335         }
 336         return ERROR_OK;
 337 }
 338
 339 int etb_write_reg(reg_t *reg, u32 value)
 340 {
 341         etb_reg_t *etb_reg = reg->arch_info;
 342         u8 reg_addr = etb_reg->addr & 0x7f;
 343         scan_field_t fields[3];
 344
 345         LOG_DEBUG("%i: 0x%8.8x", etb_reg->addr, value);
 346
 347         jtag_add_end_state(TAP_RTI);
 348         etb_scann(etb_reg->etb, 0x0);
 349         etb_set_instr(etb_reg->etb, 0xc);
 350
 351         fields[0].device = etb_reg->etb->chain_pos;
 352         fields[0].num_bits = 32;
 353         fields[0].out_value = malloc(4);
 354         buf_set_u32(fields[0].out_value, 0, 32, value);
 355         fields[0].out_mask = NULL;
 356         fields[0].in_value = NULL;
 357         fields[0].in_check_value = NULL;
 358         fields[0].in_check_mask = NULL;
 359         fields[0].in_handler = NULL;
 360         fields[0].in_handler_priv = NULL;
 361
 362         fields[1].device = etb_reg->etb->chain_pos;
 363         fields[1].num_bits = 7;
 364         fields[1].out_value = malloc(1);
 365         buf_set_u32(fields[1].out_value, 0, 7, reg_addr);
 366         fields[1].out_mask = NULL;
 367         fields[1].in_value = NULL;
 368         fields[1].in_check_value = NULL;
 369         fields[1].in_check_mask = NULL;
 370         fields[1].in_handler = NULL;
 371         fields[1].in_handler_priv = NULL;
 372
 373         fields[2].device = etb_reg->etb->chain_pos;
 374         fields[2].num_bits = 1;
 375         fields[2].out_value = malloc(1);
 376         buf_set_u32(fields[2].out_value, 0, 1, 1);
 377         fields[2].out_mask = NULL;
 378         fields[2].in_value = NULL;
 379         fields[2].in_check_value = NULL;
 380         fields[2].in_check_mask = NULL;
 381         fields[2].in_handler = NULL;
 382         fields[2].in_handler_priv = NULL;
 383
 384         jtag_add_dr_scan(3, fields, -1);
 385
 386         free(fields[0].out_value);
 387         free(fields[1].out_value);
 388         free(fields[2].out_value);
 389
 390         return ERROR_OK;
 391 }
 392
 393 int etb_store_reg(reg_t *reg)
 394 {
 395         return etb_write_reg(reg, buf_get_u32(reg->value, 0, reg->size));
 396 }
 397
 398 int etb_register_commands(struct command_context_s *cmd_ctx)
 399 {
 400         command_t *etb_cmd;
 401
 402         etb_cmd = register_command(cmd_ctx, NULL, "etb", NULL, COMMAND_ANY, "Embedded Trace Buffer");
 403
 404         register_command(cmd_ctx, etb_cmd, "config", handle_etb_config_command, COMMAND_CONFIG, NULL);
 405
 406         return ERROR_OK;
 407 }
 408
 409 int handle_etb_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 410 {
 411         target_t *target;
 412         jtag_device_t *jtag_device;
 413         armv4_5_common_t *armv4_5;
 414         arm7_9_common_t *arm7_9;
 415
 416         if (argc != 2)
 417         {
 418                 LOG_ERROR("incomplete 'etb config <target> <chain_pos>' command");
 419                 exit(-1);
 420         }
 421
 422         target = get_target_by_num(strtoul(args[0], NULL, 0));
 423
 424         if (!target)
 425         {
 426                 LOG_ERROR("target number '%s' not defined", args[0]);
 427                 exit(-1);
 428         }
 429
 430         if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
 431         {
 432                 command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
 433                 return ERROR_OK;
 434         }
 435
 436         jtag_device = jtag_get_device(strtoul(args[1], NULL, 0));
 437
 438         if (!jtag_device)
 439         {
 440                 LOG_ERROR("jtag device number '%s' not defined", args[1]);
 441                 exit(-1);
 442         }
 443
 444         if (arm7_9->etm_ctx)
 445         {
 446                 etb_t *etb = malloc(sizeof(etb_t));
 447
 448                 arm7_9->etm_ctx->capture_driver_priv = etb;
 449
 450                 etb->chain_pos = strtoul(args[1], NULL, 0);
 451                 etb->cur_scan_chain = -1;
 452                 etb->reg_cache = NULL;
 453                 etb->ram_width = 0;
 454                 etb->ram_depth = 0;
 455         }
 456         else
 457         {
 458                 LOG_ERROR("target has no ETM defined, ETB left unconfigured");
 459         }
 460
 461         return ERROR_OK;
 462 }
 463
 464 int etb_init(etm_context_t *etm_ctx)
 465 {
 466         etb_t *etb = etm_ctx->capture_driver_priv;
 467
 468         etb->etm_ctx = etm_ctx;
 469
 470         /* identify ETB RAM depth and width */
 471         etb_read_reg(&etb->reg_cache->reg_list[ETB_RAM_DEPTH]);
 472         etb_read_reg(&etb->reg_cache->reg_list[ETB_RAM_WIDTH]);
 473         jtag_execute_queue();
 474
 475         etb->ram_depth = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_DEPTH].value, 0, 32);
 476         etb->ram_width = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_WIDTH].value, 0, 32);
 477
 478         return ERROR_OK;
 479 }
 480
 481 trace_status_t etb_status(etm_context_t *etm_ctx)
 482 {
 483         etb_t *etb = etm_ctx->capture_driver_priv;
 484
 485         etb->etm_ctx = etm_ctx;
 486
 487         /* if tracing is currently idle, return this information */
 488         if (etm_ctx->capture_status == TRACE_IDLE)
 489         {
 490                 return etm_ctx->capture_status;
 491         }
 492         else if (etm_ctx->capture_status & TRACE_RUNNING)
 493         {
 494                 reg_t *etb_status_reg = &etb->reg_cache->reg_list[ETB_STATUS];
 495                 int etb_timeout = 100;
 496
 497                 /* trace is running, check the ETB status flags */
 498                 etb_get_reg(etb_status_reg);
 499
 500                 /* check Full bit to identify an overflow */
 501                 if (buf_get_u32(etb_status_reg->value, 0, 1) == 1)
 502                         etm_ctx->capture_status |= TRACE_OVERFLOWED;
 503
 504                 /* check Triggered bit to identify trigger condition */
 505                 if (buf_get_u32(etb_status_reg->value, 1, 1) == 1)
 506                         etm_ctx->capture_status |= TRACE_TRIGGERED;
 507
 508                 /* check AcqComp to identify trace completion */
 509                 if (buf_get_u32(etb_status_reg->value, 2, 1) == 1)
 510                 {
 511                         while (etb_timeout-- && (buf_get_u32(etb_status_reg->value, 3, 1) == 0))
 512                         {
 513                                 /* wait for data formatter idle */
 514                                 etb_get_reg(etb_status_reg);
 515                         }
 516
 517                         if (etb_timeout == 0)
 518                         {
 519                                 LOG_ERROR("AcqComp set but DFEmpty won't go high, ETB status: 0x%x",
 520                                         buf_get_u32(etb_status_reg->value, 0, etb_status_reg->size));
 521                         }
 522
 523                         if (!(etm_ctx->capture_status && TRACE_TRIGGERED))
 524                         {
 525                                 LOG_ERROR("trace completed, but no trigger condition detected");
 526                         }
 527
 528                         etm_ctx->capture_status &= ~TRACE_RUNNING;
 529                         etm_ctx->capture_status |= TRACE_COMPLETED;
 530                 }
 531         }
 532
 533         return etm_ctx->capture_status;
 534 }
 535
 536 int etb_read_trace(etm_context_t *etm_ctx)
 537 {
 538         etb_t *etb = etm_ctx->capture_driver_priv;
 539         int first_frame = 0;
 540         int num_frames = etb->ram_depth;
 541         u32 *trace_data = NULL;
 542         int i, j;
 543
 544         etb_read_reg(&etb->reg_cache->reg_list[ETB_STATUS]);
 545         etb_read_reg(&etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER]);
 546         jtag_execute_queue();
 547
 548         /* check if we overflowed, and adjust first frame of the trace accordingly
 549          * if we didn't overflow, read only up to the frame that would be written next,
 550          * i.e. don't read invalid entries
 551          */
 552         if (buf_get_u32(etb->reg_cache->reg_list[ETB_STATUS].value, 0, 1))
 553         {
 554                 first_frame = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER].value, 0, 32);
 555         }
 556         else
 557         {
 558                 num_frames = buf_get_u32(etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER].value, 0, 32);
 559         }
 560
 561         etb_write_reg(&etb->reg_cache->reg_list[ETB_RAM_READ_POINTER], first_frame);
 562
 563         /* read data into temporary array for unpacking */
 564         trace_data = malloc(sizeof(u32) * num_frames);
 565         etb_read_ram(etb, trace_data, num_frames);
 566
 567         if (etm_ctx->trace_depth > 0)
 568         {
 569                 free(etm_ctx->trace_data);
 570         }
 571
 572         if ((etm_ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_4BIT)
 573                 etm_ctx->trace_depth = num_frames * 3;
 574         else if ((etm_ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
 575                 etm_ctx->trace_depth = num_frames * 2;
 576         else
 577                 etm_ctx->trace_depth = num_frames;
 578
 579         etm_ctx->trace_data = malloc(sizeof(etmv1_trace_data_t) * etm_ctx->trace_depth);
 580
 581         for (i = 0, j = 0; i < num_frames; i++)
 582         {
 583                 if ((etm_ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_4BIT)
 584                 {
 585                         /* trace word j */
 586                         etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
 587                         etm_ctx->trace_data[j].packet = (trace_data[i] & 0x78) >> 3;
 588                         etm_ctx->trace_data[j].flags = 0;
 589                         if ((trace_data[i] & 0x80) >> 7)
 590                         {
 591                                 etm_ctx->trace_data[j].flags |= ETMV1_TRACESYNC_CYCLE;
 592                         }
 593                         if (etm_ctx->trace_data[j].pipestat == STAT_TR)
 594                         {
 595                                 etm_ctx->trace_data[j].pipestat = etm_ctx->trace_data[j].packet & 0x7;
 596                                 etm_ctx->trace_data[j].flags |= ETMV1_TRIGGER_CYCLE;
 597                         }
 598
 599                         /* trace word j+1 */
 600                         etm_ctx->trace_data[j+1].pipestat = (trace_data[i] & 0x100) >> 8;
 601                         etm_ctx->trace_data[j+1].packet = (trace_data[i] & 0x7800) >> 11;
 602                         etm_ctx->trace_data[j+1].flags = 0;
 603                         if ((trace_data[i] & 0x8000) >> 15)
 604                         {
 605                                 etm_ctx->trace_data[j+1].flags |= ETMV1_TRACESYNC_CYCLE;
 606                         }
 607                         if (etm_ctx->trace_data[j+1].pipestat == STAT_TR)
 608                         {
 609                                 etm_ctx->trace_data[j+1].pipestat = etm_ctx->trace_data[j+1].packet & 0x7;
 610                                 etm_ctx->trace_data[j+1].flags |= ETMV1_TRIGGER_CYCLE;
 611                         }
 612
 613                         /* trace word j+2 */
 614                         etm_ctx->trace_data[j+2].pipestat = (trace_data[i] & 0x10000) >> 16;
 615                         etm_ctx->trace_data[j+2].packet = (trace_data[i] & 0x780000) >> 19;
 616                         etm_ctx->trace_data[j+2].flags = 0;
 617                         if ((trace_data[i] & 0x800000) >> 23)
 618                         {
 619                                 etm_ctx->trace_data[j+2].flags |= ETMV1_TRACESYNC_CYCLE;
 620                         }
 621                         if (etm_ctx->trace_data[j+2].pipestat == STAT_TR)
 622                         {
 623                                 etm_ctx->trace_data[j+2].pipestat = etm_ctx->trace_data[j+2].packet & 0x7;
 624                                 etm_ctx->trace_data[j+2].flags |= ETMV1_TRIGGER_CYCLE;
 625                         }
 626
 627                         j += 3;
 628                 }
 629                 else if ((etm_ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
 630                 {
 631                         /* trace word j */
 632                         etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
 633                         etm_ctx->trace_data[j].packet = (trace_data[i] & 0x7f8) >> 3;
 634                         etm_ctx->trace_data[j].flags = 0;
 635                         if ((trace_data[i] & 0x800) >> 11)
 636                         {
 637                                 etm_ctx->trace_data[j].flags |= ETMV1_TRACESYNC_CYCLE;
 638                         }
 639                         if (etm_ctx->trace_data[j].pipestat == STAT_TR)
 640                         {
 641                                 etm_ctx->trace_data[j].pipestat = etm_ctx->trace_data[j].packet & 0x7;
 642                                 etm_ctx->trace_data[j].flags |= ETMV1_TRIGGER_CYCLE;
 643                         }
 644
 645                         /* trace word j+1 */
 646                         etm_ctx->trace_data[j+1].pipestat = (trace_data[i] & 0x7000) >> 12;
 647                         etm_ctx->trace_data[j+1].packet = (trace_data[i] & 0x7f8000) >> 15;
 648                         etm_ctx->trace_data[j+1].flags = 0;
 649                         if ((trace_data[i] & 0x800000) >> 23)
 650                         {
 651                                 etm_ctx->trace_data[j+1].flags |= ETMV1_TRACESYNC_CYCLE;
 652                         }
 653                         if (etm_ctx->trace_data[j+1].pipestat == STAT_TR)
 654                         {
 655                                 etm_ctx->trace_data[j+1].pipestat = etm_ctx->trace_data[j+1].packet & 0x7;
 656                                 etm_ctx->trace_data[j+1].flags |= ETMV1_TRIGGER_CYCLE;
 657                         }
 658
 659                         j += 2;
 660                 }
 661                 else
 662                 {
 663                         /* trace word j */
 664                         etm_ctx->trace_data[j].pipestat = trace_data[i] & 0x7;
 665                         etm_ctx->trace_data[j].packet = (trace_data[i] & 0x7fff8) >> 3;
 666                         etm_ctx->trace_data[j].flags = 0;
 667                         if ((trace_data[i] & 0x80000) >> 19)
 668                         {
 669                                 etm_ctx->trace_data[j].flags |= ETMV1_TRACESYNC_CYCLE;
 670                         }
 671                         if (etm_ctx->trace_data[j].pipestat == STAT_TR)
 672                         {
 673                                 etm_ctx->trace_data[j].pipestat = etm_ctx->trace_data[j].packet & 0x7;
 674                                 etm_ctx->trace_data[j].flags |= ETMV1_TRIGGER_CYCLE;
 675                         }
 676
 677                         j += 1;
 678                 }
 679         }
 680
 681         free(trace_data);
 682
 683         return ERROR_OK;
 684 }
 685
 686 int etb_start_capture(etm_context_t *etm_ctx)
 687 {
 688         etb_t *etb = etm_ctx->capture_driver_priv;
 689         u32 etb_ctrl_value = 0x1;
 690         u32 trigger_count;
 691
 692         if ((etm_ctx->portmode & ETM_PORT_MODE_MASK) == ETM_PORT_DEMUXED)
 693         {
 694                 if ((etm_ctx->portmode & ETM_PORT_WIDTH_MASK) != ETM_PORT_8BIT)
 695                 {
 696                         LOG_ERROR("ETB can't run in demultiplexed mode with a 4 or 16 bit port");
 697                         return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
 698                 }
 699                 etb_ctrl_value |= 0x2;
 700         }
 701
 702         if ((etm_ctx->portmode & ETM_PORT_MODE_MASK) == ETM_PORT_MUXED)
 703                 return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
 704
 705         trigger_count = (etb->ram_depth * etm_ctx->trigger_percent) / 100;
 706
 707         etb_write_reg(&etb->reg_cache->reg_list[ETB_TRIGGER_COUNTER], trigger_count);
 708         etb_write_reg(&etb->reg_cache->reg_list[ETB_RAM_WRITE_POINTER], 0x0);
 709         etb_write_reg(&etb->reg_cache->reg_list[ETB_CTRL], etb_ctrl_value);
 710         jtag_execute_queue();
 711
 712         /* we're starting a new trace, initialize capture status */
 713         etm_ctx->capture_status = TRACE_RUNNING;
 714
 715         return ERROR_OK;
 716 }
 717
 718 int etb_stop_capture(etm_context_t *etm_ctx)
 719 {
 720         etb_t *etb = etm_ctx->capture_driver_priv;
 721         reg_t *etb_ctrl_reg = &etb->reg_cache->reg_list[ETB_CTRL];
 722
 723         etb_write_reg(etb_ctrl_reg, 0x0);
 724         jtag_execute_queue();
 725
 726         /* trace stopped, just clear running flag, but preserve others */
 727         etm_ctx->capture_status &= ~TRACE_RUNNING;
 728
 729         return ERROR_OK;
 730 }
 731
 732 etm_capture_driver_t etb_capture_driver =
 733 {
 734         .name = "etb",
 735         .register_commands = etb_register_commands,
 736         .init = etb_init,
 737         .status = etb_status,
 738         .start_capture = etb_start_capture,
 739         .stop_capture = etb_stop_capture,
 740         .read_trace = etb_read_trace,
 741 };