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   1 /***************************************************************************
   2  *   Copyright (C) 2005 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 "image.h"
  28 #include "arm_disassembler.h"
  29 #include "register.h"
  30 #include "etm_dummy.h"
  31
  32 #if BUILD_OOCD_TRACE == 1
  33 #include "oocd_trace.h"
  34 #endif
  35
  36
  37 /*
  38  * ARM "Embedded Trace Macrocell" (ETM) support -- direct JTAG access.
  39  *
  40  * ETM modules collect instruction and/or data trace information, compress
  41  * it, and transfer it to a debugging host through either a (buffered) trace
  42  * port (often a 38-pin Mictor connector) or an Embedded Trace Buffer (ETB).
  43  *
  44  * There are several generations of these modules.  Original versions have
  45  * JTAG access through a dedicated scan chain.  Recent versions have added
  46  * access via coprocessor instructions, memory addressing, and the ARM Debug
  47  * Interface v5 (ADIv5); and phased out direct JTAG access.
  48  *
  49  * This code supports up to the ETMv1.3 architecture, as seen in ETM9 and
  50  * most common ARM9 systems.  Note: "CoreSight ETM9" implements ETMv3.2,
  51  * implying non-JTAG connectivity options.
  52  *
  53  * Relevant documentation includes:
  54  *  ARM DDI 0157G ... ETM9 (r2p2) Technical Reference Manual
  55  *  ARM DDI 0315B ... CoreSight ETM9 (r0p1) Technical Reference Manual
  56  *  ARM IHI 0014O ... Embedded Trace Macrocell, Architecture Specification
  57  */
  58
  59 enum {
  60         RO,                             /* read/only */
  61         WO,                             /* write/only */
  62         RW,                             /* read/write */
  63 };
  64
  65 struct etm_reg_info {
  66         uint8_t         addr;
  67         uint8_t         size;           /* low-N of 32 bits */
  68         uint8_t         mode;           /* RO, WO, RW */
  69         uint8_t         bcd_vers;       /* 1.0, 2.0, etc */
  70         char            *name;
  71 };
  72
  73 /*
  74  * Registers 0..0x7f are JTAG-addressable using scanchain 6.
  75  * (Or on some processors, through coprocessor operations.)
  76  * Newer versions of ETM make some W/O registers R/W, and
  77  * provide definitions for some previously-unused bits.
  78  */
  79
  80 /* core registers used to version/configure the ETM */
  81 static const struct etm_reg_info etm_core[] = {
  82         /* NOTE: we "know" the order here ... */
  83         { ETM_CONFIG, 32, RO, 0x10, "ETM_config", },
  84         { ETM_ID, 32, RO, 0x20, "ETM_id", },
  85 };
  86
  87 /* basic registers that are always there given the right ETM version */
  88 static const struct etm_reg_info etm_basic[] = {
  89         /* ETM Trace Registers */
  90         { ETM_CTRL, 32, RW, 0x10, "ETM_ctrl", },
  91         { ETM_TRIG_EVENT, 17, WO, 0x10, "ETM_trig_event", },
  92         { ETM_ASIC_CTRL,  8, WO, 0x10, "ETM_asic_ctrl", },
  93         { ETM_STATUS,  3, RO, 0x11, "ETM_status", },
  94         { ETM_SYS_CONFIG,  9, RO, 0x12, "ETM_sys_config", },
  95
  96         /* TraceEnable configuration */
  97         { ETM_TRACE_RESOURCE_CTRL, 32, WO, 0x12, "ETM_trace_resource_ctrl", },
  98         { ETM_TRACE_EN_CTRL2, 16, WO, 0x12, "ETM_trace_en_ctrl2", },
  99         { ETM_TRACE_EN_EVENT, 17, WO, 0x10, "ETM_trace_en_event", },
 100         { ETM_TRACE_EN_CTRL1, 26, WO, 0x10, "ETM_trace_en_ctrl1", },
 101
 102         /* ViewData configuration (data trace) */
 103         { ETM_VIEWDATA_EVENT, 17, WO, 0x10, "ETM_viewdata_event", },
 104         { ETM_VIEWDATA_CTRL1, 32, WO, 0x10, "ETM_viewdata_ctrl1", },
 105         { ETM_VIEWDATA_CTRL2, 32, WO, 0x10, "ETM_viewdata_ctrl2", },
 106         { ETM_VIEWDATA_CTRL3, 17, WO, 0x10, "ETM_viewdata_ctrl3", },
 107
 108         /* REVISIT exclude VIEWDATA_CTRL2 when it's not there */
 109
 110         { 0x78, 12, WO, 0x20, "ETM_sync_freq", },
 111         { 0x7a, 22, RO, 0x31, "ETM_config_code_ext", },
 112         { 0x7b, 32, WO, 0x31, "ETM_ext_input_select", },
 113         { 0x7c, 32, WO, 0x34, "ETM_trace_start_stop", },
 114         { 0x7d, 8, WO, 0x34, "ETM_behavior_control", },
 115 };
 116
 117 static const struct etm_reg_info etm_fifofull[] = {
 118         /* FIFOFULL configuration */
 119         { ETM_FIFOFULL_REGION, 25, WO, 0x10, "ETM_fifofull_region", },
 120         { ETM_FIFOFULL_LEVEL,  8, WO, 0x10, "ETM_fifofull_level", },
 121 };
 122
 123 static const struct etm_reg_info etm_addr_comp[] = {
 124         /* Address comparator register pairs */
 125 #define ADDR_COMPARATOR(i) \
 126                 { ETM_ADDR_COMPARATOR_VALUE + (i) - 1, 32, WO, 0x10, \
 127                                 "ETM_addr_" #i "_comparator_value", }, \
 128                 { ETM_ADDR_ACCESS_TYPE + (i) - 1,  7, WO, 0x10, \
 129                                 "ETM_addr_" #i "_access_type", }
 130         ADDR_COMPARATOR(1),
 131         ADDR_COMPARATOR(2),
 132         ADDR_COMPARATOR(3),
 133         ADDR_COMPARATOR(4),
 134         ADDR_COMPARATOR(5),
 135         ADDR_COMPARATOR(6),
 136         ADDR_COMPARATOR(7),
 137         ADDR_COMPARATOR(8),
 138
 139         ADDR_COMPARATOR(9),
 140         ADDR_COMPARATOR(10),
 141         ADDR_COMPARATOR(11),
 142         ADDR_COMPARATOR(12),
 143         ADDR_COMPARATOR(13),
 144         ADDR_COMPARATOR(14),
 145         ADDR_COMPARATOR(15),
 146         ADDR_COMPARATOR(16),
 147 #undef ADDR_COMPARATOR
 148 };
 149
 150 static const struct etm_reg_info etm_data_comp[] = {
 151         /* Data Value Comparators (NOTE: odd addresses are reserved) */
 152 #define DATA_COMPARATOR(i) \
 153                 { ETM_DATA_COMPARATOR_VALUE + 2*(i) - 1, 32, WO, 0x10, \
 154                                 "ETM_data_" #i "_comparator_value", }, \
 155                 { ETM_DATA_COMPARATOR_MASK + 2*(i) - 1, 32, WO, 0x10, \
 156                                 "ETM_data_" #i "_comparator_mask", }
 157         DATA_COMPARATOR(1),
 158         DATA_COMPARATOR(2),
 159         DATA_COMPARATOR(3),
 160         DATA_COMPARATOR(4),
 161         DATA_COMPARATOR(5),
 162         DATA_COMPARATOR(6),
 163         DATA_COMPARATOR(7),
 164         DATA_COMPARATOR(8),
 165 #undef DATA_COMPARATOR
 166 };
 167
 168 static const struct etm_reg_info etm_counters[] = {
 169 #define ETM_COUNTER(i) \
 170                 { ETM_COUNTER_RELOAD_VALUE + (i) - 1, 16, WO, 0x10, \
 171                                 "ETM_counter_" #i "_reload_value", }, \
 172                 { ETM_COUNTER_ENABLE + (i) - 1, 18, WO, 0x10, \
 173                                 "ETM_counter_" #i "_enable", }, \
 174                 { ETM_COUNTER_RELOAD_EVENT + (i) - 1, 17, WO, 0x10, \
 175                                 "ETM_counter_" #i "_reload_event", }, \
 176                 { ETM_COUNTER_VALUE + (i) - 1, 16, RO, 0x10, \
 177                                 "ETM_counter_" #i "_value", }
 178         ETM_COUNTER(1),
 179         ETM_COUNTER(2),
 180         ETM_COUNTER(3),
 181         ETM_COUNTER(4),
 182 #undef ETM_COUNTER
 183 };
 184
 185 static const struct etm_reg_info etm_sequencer[] = {
 186 #define ETM_SEQ(i) \
 187                 { ETM_SEQUENCER_EVENT + (i), 17, WO, 0x10, \
 188                                 "ETM_sequencer_event" #i, }
 189         ETM_SEQ(0),                             /* 1->2 */
 190         ETM_SEQ(1),                             /* 2->1 */
 191         ETM_SEQ(2),                             /* 2->3 */
 192         ETM_SEQ(3),                             /* 3->1 */
 193         ETM_SEQ(4),                             /* 3->2 */
 194         ETM_SEQ(5),                             /* 1->3 */
 195 #undef ETM_SEQ
 196         /* 0x66 reserved */
 197         { ETM_SEQUENCER_STATE,  2, RO, 0x10, "ETM_sequencer_state", },
 198 };
 199
 200 static const struct etm_reg_info etm_outputs[] = {
 201 #define ETM_OUTPUT(i) \
 202                 { ETM_EXTERNAL_OUTPUT + (i) - 1, 17, WO, 0x10, \
 203                                 "ETM_external_output" #i, }
 204
 205         ETM_OUTPUT(1),
 206         ETM_OUTPUT(2),
 207         ETM_OUTPUT(3),
 208         ETM_OUTPUT(4),
 209 #undef ETM_OUTPUT
 210 };
 211
 212 #if 0
 213         /* registers from 0x6c..0x7f were added after ETMv1.3 */
 214
 215         /* Context ID Comparators */
 216         { 0x6c, 32, RO, 0x20, "ETM_contextid_comparator_value1", }
 217         { 0x6d, 32, RO, 0x20, "ETM_contextid_comparator_value2", }
 218         { 0x6e, 32, RO, 0x20, "ETM_contextid_comparator_value3", }
 219         { 0x6f, 32, RO, 0x20, "ETM_contextid_comparator_mask", }
 220 #endif
 221
 222 static int etm_get_reg(struct reg *reg);
 223 static int etm_read_reg_w_check(struct reg *reg,
 224                 uint8_t* check_value, uint8_t* check_mask);
 225 static int etm_register_user_commands(struct command_context *cmd_ctx);
 226 static int etm_set_reg_w_exec(struct reg *reg, uint8_t *buf);
 227 static int etm_write_reg(struct reg *reg, uint32_t value);
 228
 229 static const struct reg_arch_type etm_scan6_type = {
 230         .get = etm_get_reg,
 231         .set = etm_set_reg_w_exec,
 232 };
 233
 234 /* Look up register by ID ... most ETM instances only
 235  * support a subset of the possible registers.
 236  */
 237 static struct reg *etm_reg_lookup(struct etm_context *etm_ctx, unsigned id)
 238 {
 239         struct reg_cache *cache = etm_ctx->reg_cache;
 240         unsigned i;
 241
 242         for (i = 0; i < cache->num_regs; i++) {
 243                 struct etm_reg *reg = cache->reg_list[i].arch_info;
 244
 245                 if (reg->reg_info->addr == id)
 246                         return &cache->reg_list[i];
 247         }
 248
 249         /* caller asking for nonexistent register is a bug! */
 250         /* REVISIT say which of the N targets was involved */
 251         LOG_ERROR("ETM: register 0x%02x not available", id);
 252         return NULL;
 253 }
 254
 255 static void etm_reg_add(unsigned bcd_vers, struct arm_jtag *jtag_info,
 256                 struct reg_cache *cache, struct etm_reg *ereg,
 257                 const struct etm_reg_info *r, unsigned nreg)
 258 {
 259         struct reg *reg = cache->reg_list;
 260
 261         reg += cache->num_regs;
 262         ereg += cache->num_regs;
 263
 264         /* add up to "nreg" registers from "r", if supported by this
 265          * version of the ETM, to the specified cache.
 266          */
 267         for (; nreg--; r++) {
 268
 269                 /* this ETM may be too old to have some registers */
 270                 if (r->bcd_vers > bcd_vers)
 271                         continue;
 272
 273                 reg->name = r->name;
 274                 reg->size = r->size;
 275                 reg->value = &ereg->value;
 276                 reg->arch_info = ereg;
 277                 reg->type = &etm_scan6_type;
 278                 reg++;
 279                 cache->num_regs++;
 280
 281                 ereg->reg_info = r;
 282                 ereg->jtag_info = jtag_info;
 283                 ereg++;
 284         }
 285 }
 286
 287 struct reg_cache *etm_build_reg_cache(struct target *target,
 288                 struct arm_jtag *jtag_info, struct etm_context *etm_ctx)
 289 {
 290         struct reg_cache *reg_cache = malloc(sizeof(struct reg_cache));
 291         struct reg *reg_list = NULL;
 292         struct etm_reg *arch_info = NULL;
 293         unsigned bcd_vers, config;
 294
 295         /* the actual registers are kept in two arrays */
 296         reg_list = calloc(128, sizeof(struct reg));
 297         arch_info = calloc(128, sizeof(struct etm_reg));
 298
 299         /* fill in values for the reg cache */
 300         reg_cache->name = "etm registers";
 301         reg_cache->next = NULL;
 302         reg_cache->reg_list = reg_list;
 303         reg_cache->num_regs = 0;
 304
 305         /* add ETM_CONFIG, then parse its values to see
 306          * which other registers exist in this ETM
 307          */
 308         etm_reg_add(0x10, jtag_info, reg_cache, arch_info,
 309                         etm_core, 1);
 310
 311         etm_get_reg(reg_list);
 312         etm_ctx->config = buf_get_u32((void *)&arch_info->value, 0, 32);
 313         config = etm_ctx->config;
 314
 315         /* figure ETM version then add base registers */
 316         if (config & (1 << 31)) {
 317                 bcd_vers = 0x20;
 318                 LOG_WARNING("ETMv2+ support is incomplete");
 319
 320                 /* REVISIT more registers may exist; they may now be
 321                  * readable; more register bits have defined meanings;
 322                  * don't presume trace start/stop support is present;
 323                  * and include any context ID comparator registers.
 324                  */
 325                 etm_reg_add(0x20, jtag_info, reg_cache, arch_info,
 326                                 etm_core + 1, 1);
 327                 etm_get_reg(reg_list + 1);
 328                 etm_ctx->id = buf_get_u32(
 329                                 (void *)&arch_info[1].value, 0, 32);
 330                 LOG_DEBUG("ETM ID: %08x", (unsigned) etm_ctx->id);
 331                 bcd_vers = 0x10 + (((etm_ctx->id) >> 4) & 0xff);
 332
 333         } else {
 334                 switch (config >> 28) {
 335                 case 7:
 336                 case 5:
 337                 case 3:
 338                         bcd_vers = 0x13;
 339                         break;
 340                 case 4:
 341                 case 2:
 342                         bcd_vers = 0x12;
 343                         break;
 344                 case 1:
 345                         bcd_vers = 0x11;
 346                         break;
 347                 case 0:
 348                         bcd_vers = 0x10;
 349                         break;
 350                 default:
 351                         LOG_WARNING("Bad ETMv1 protocol %d", config >> 28);
 352                         goto fail;
 353                 }
 354         }
 355         etm_ctx->bcd_vers = bcd_vers;
 356         LOG_INFO("ETM v%d.%d", bcd_vers >> 4, bcd_vers & 0xf);
 357
 358         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 359                         etm_basic, ARRAY_SIZE(etm_basic));
 360
 361         /* address and data comparators; counters; outputs */
 362         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 363                         etm_addr_comp, 4 * (0x0f & (config >> 0)));
 364         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 365                         etm_data_comp, 2 * (0x0f & (config >> 4)));
 366         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 367                         etm_counters, 4 * (0x07 & (config >> 13)));
 368         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 369                         etm_outputs, (0x07 & (config >> 20)));
 370
 371         /* FIFOFULL presence is optional
 372          * REVISIT for ETMv1.2 and later, don't bother adding this
 373          * unless ETM_SYS_CONFIG says it's also *supported* ...
 374          */
 375         if (config & (1 << 23))
 376                 etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 377                                 etm_fifofull, ARRAY_SIZE(etm_fifofull));
 378
 379         /* sequencer is optional (for state-dependant triggering) */
 380         if (config & (1 << 16))
 381                 etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 382                                 etm_sequencer, ARRAY_SIZE(etm_sequencer));
 383
 384         /* REVISIT could realloc and likely save half the memory
 385          * in the two chunks we allocated...
 386          */
 387
 388         /* the ETM might have an ETB connected */
 389         if (strcmp(etm_ctx->capture_driver->name, "etb") == 0)
 390         {
 391                 struct etb *etb = etm_ctx->capture_driver_priv;
 392
 393                 if (!etb)
 394                 {
 395                         LOG_ERROR("etb selected as etm capture driver, but no ETB configured");
 396                         goto fail;
 397                 }
 398
 399                 reg_cache->next = etb_build_reg_cache(etb);
 400
 401                 etb->reg_cache = reg_cache->next;
 402         }
 403
 404         etm_ctx->reg_cache = reg_cache;
 405         return reg_cache;
 406
 407 fail:
 408         free(reg_cache);
 409         free(reg_list);
 410         free(arch_info);
 411         return NULL;
 412 }
 413
 414 static int etm_read_reg(struct reg *reg)
 415 {
 416         return etm_read_reg_w_check(reg, NULL, NULL);
 417 }
 418
 419 static int etm_store_reg(struct reg *reg)
 420 {
 421         return etm_write_reg(reg, buf_get_u32(reg->value, 0, reg->size));
 422 }
 423
 424 int etm_setup(struct target *target)
 425 {
 426         int retval;
 427         uint32_t etm_ctrl_value;
 428         struct arm *arm = target_to_arm(target);
 429         struct etm_context *etm_ctx = arm->etm;
 430         struct reg *etm_ctrl_reg;
 431
 432         etm_ctrl_reg = etm_reg_lookup(etm_ctx, ETM_CTRL);
 433         if (!etm_ctrl_reg)
 434                 return ERROR_OK;
 435
 436         /* initialize some ETM control register settings */
 437         etm_get_reg(etm_ctrl_reg);
 438         etm_ctrl_value = buf_get_u32(etm_ctrl_reg->value, 0, 32);
 439
 440         /* clear the ETM powerdown bit (0) */
 441         etm_ctrl_value &= ~ETM_CTRL_POWERDOWN;
 442
 443         /* configure port width (21,6:4), mode (13,17:16) and
 444          * for older modules clocking (13)
 445          */
 446         etm_ctrl_value = (etm_ctrl_value
 447                         & ~ETM_PORT_WIDTH_MASK
 448                         & ~ETM_PORT_MODE_MASK
 449                         & ~ETM_CTRL_DBGRQ
 450                         & ~ETM_PORT_CLOCK_MASK)
 451                 | etm_ctx->control;
 452
 453         buf_set_u32(etm_ctrl_reg->value, 0, 32, etm_ctrl_value);
 454         etm_store_reg(etm_ctrl_reg);
 455
 456         etm_ctx->control = etm_ctrl_value;
 457
 458         if ((retval = jtag_execute_queue()) != ERROR_OK)
 459                 return retval;
 460
 461         /* REVISIT for ETMv3.0 and later, read ETM_sys_config to
 462          * verify that those width and mode settings are OK ...
 463          */
 464
 465         if ((retval = etm_ctx->capture_driver->init(etm_ctx)) != ERROR_OK)
 466         {
 467                 LOG_ERROR("ETM capture driver initialization failed");
 468                 return retval;
 469         }
 470         return ERROR_OK;
 471 }
 472
 473 static int etm_get_reg(struct reg *reg)
 474 {
 475         int retval;
 476
 477         if ((retval = etm_read_reg(reg)) != ERROR_OK)
 478         {
 479                 LOG_ERROR("BUG: error scheduling etm register read");
 480                 return retval;
 481         }
 482
 483         if ((retval = jtag_execute_queue()) != ERROR_OK)
 484         {
 485                 LOG_ERROR("register read failed");
 486                 return retval;
 487         }
 488
 489         return ERROR_OK;
 490 }
 491
 492 static int etm_read_reg_w_check(struct reg *reg,
 493                 uint8_t* check_value, uint8_t* check_mask)
 494 {
 495         struct etm_reg *etm_reg = reg->arch_info;
 496         const struct etm_reg_info *r = etm_reg->reg_info;
 497         uint8_t reg_addr = r->addr & 0x7f;
 498         struct scan_field fields[3];
 499         int retval;
 500
 501         if (etm_reg->reg_info->mode == WO) {
 502                 LOG_ERROR("BUG: can't read write-only register %s", r->name);
 503                 return ERROR_INVALID_ARGUMENTS;
 504         }
 505
 506         LOG_DEBUG("%s (%u)", r->name, reg_addr);
 507
 508         retval = arm_jtag_scann(etm_reg->jtag_info, 0x6, TAP_IDLE);
 509         if (retval != ERROR_OK)
 510                 return retval;
 511         retval = arm_jtag_set_instr(etm_reg->jtag_info, etm_reg->jtag_info->intest_instr, NULL, TAP_IDLE);
 512         if (retval != ERROR_OK)
 513                 return retval;
 514
 515         fields[0].num_bits = 32;
 516         fields[0].out_value = reg->value;
 517         fields[0].in_value = NULL;
 518         fields[0].check_value = NULL;
 519         fields[0].check_mask = NULL;
 520
 521         fields[1].num_bits = 7;
 522         uint8_t temp1;
 523         fields[1].out_value = &temp1;
 524         buf_set_u32(&temp1, 0, 7, reg_addr);
 525         fields[1].in_value = NULL;
 526         fields[1].check_value = NULL;
 527         fields[1].check_mask = NULL;
 528
 529         fields[2].num_bits = 1;
 530         uint8_t temp2;
 531         fields[2].out_value = &temp2;
 532         buf_set_u32(&temp2, 0, 1, 0);
 533         fields[2].in_value = NULL;
 534         fields[2].check_value = NULL;
 535         fields[2].check_mask = NULL;
 536
 537         jtag_add_dr_scan(etm_reg->jtag_info->tap, 3, fields, TAP_IDLE);
 538
 539         fields[0].in_value = reg->value;
 540         fields[0].check_value = check_value;
 541         fields[0].check_mask = check_mask;
 542
 543         jtag_add_dr_scan_check(etm_reg->jtag_info->tap, 3, fields, TAP_IDLE);
 544
 545         return ERROR_OK;
 546 }
 547
 548 static int etm_set_reg(struct reg *reg, uint32_t value)
 549 {
 550         int retval;
 551
 552         if ((retval = etm_write_reg(reg, value)) != ERROR_OK)
 553         {
 554                 LOG_ERROR("BUG: error scheduling etm register write");
 555                 return retval;
 556         }
 557
 558         buf_set_u32(reg->value, 0, reg->size, value);
 559         reg->valid = 1;
 560         reg->dirty = 0;
 561
 562         return ERROR_OK;
 563 }
 564
 565 static int etm_set_reg_w_exec(struct reg *reg, uint8_t *buf)
 566 {
 567         int retval;
 568
 569         etm_set_reg(reg, buf_get_u32(buf, 0, reg->size));
 570
 571         if ((retval = jtag_execute_queue()) != ERROR_OK)
 572         {
 573                 LOG_ERROR("register write failed");
 574                 return retval;
 575         }
 576         return ERROR_OK;
 577 }
 578
 579 static int etm_write_reg(struct reg *reg, uint32_t value)
 580 {
 581         struct etm_reg *etm_reg = reg->arch_info;
 582         const struct etm_reg_info *r = etm_reg->reg_info;
 583         uint8_t reg_addr = r->addr & 0x7f;
 584         struct scan_field fields[3];
 585         int retval;
 586
 587         if (etm_reg->reg_info->mode == RO) {
 588                 LOG_ERROR("BUG: can't write read--only register %s", r->name);
 589                 return ERROR_INVALID_ARGUMENTS;
 590         }
 591
 592         LOG_DEBUG("%s (%u): 0x%8.8" PRIx32 "", r->name, reg_addr, value);
 593
 594         retval = arm_jtag_scann(etm_reg->jtag_info, 0x6, TAP_IDLE);
 595         if (retval != ERROR_OK)
 596                 return retval;
 597         retval = arm_jtag_set_instr(etm_reg->jtag_info, etm_reg->jtag_info->intest_instr, NULL, TAP_IDLE);
 598         if (retval != ERROR_OK)
 599                 return retval;
 600
 601         fields[0].num_bits = 32;
 602         uint8_t tmp1[4];
 603         fields[0].out_value = tmp1;
 604         buf_set_u32(tmp1, 0, 32, value);
 605         fields[0].in_value = NULL;
 606
 607         fields[1].num_bits = 7;
 608         uint8_t tmp2;
 609         fields[1].out_value = &tmp2;
 610         buf_set_u32(&tmp2, 0, 7, reg_addr);
 611         fields[1].in_value = NULL;
 612
 613         fields[2].num_bits = 1;
 614         uint8_t tmp3;
 615         fields[2].out_value = &tmp3;
 616         buf_set_u32(&tmp3, 0, 1, 1);
 617         fields[2].in_value = NULL;
 618
 619         jtag_add_dr_scan(etm_reg->jtag_info->tap, 3, fields, TAP_IDLE);
 620
 621         return ERROR_OK;
 622 }
 623
 624
 625 /* ETM trace analysis functionality */
 626
 627 static struct etm_capture_driver *etm_capture_drivers[] =
 628 {
 629         &etb_capture_driver,
 630         &etm_dummy_capture_driver,
 631 #if BUILD_OOCD_TRACE == 1
 632         &oocd_trace_capture_driver,
 633 #endif
 634         NULL
 635 };
 636
 637 static int etm_read_instruction(struct etm_context *ctx, struct arm_instruction *instruction)
 638 {
 639         int i;
 640         int section = -1;
 641         size_t size_read;
 642         uint32_t opcode;
 643         int retval;
 644
 645         if (!ctx->image)
 646                 return ERROR_TRACE_IMAGE_UNAVAILABLE;
 647
 648         /* search for the section the current instruction belongs to */
 649         for (i = 0; i < ctx->image->num_sections; i++)
 650         {
 651                 if ((ctx->image->sections[i].base_address <= ctx->current_pc) &&
 652                         (ctx->image->sections[i].base_address + ctx->image->sections[i].size > ctx->current_pc))
 653                 {
 654                         section = i;
 655                         break;
 656                 }
 657         }
 658
 659         if (section == -1)
 660         {
 661                 /* current instruction couldn't be found in the image */
 662                 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
 663         }
 664
 665         if (ctx->core_state == ARM_STATE_ARM)
 666         {
 667                 uint8_t buf[4];
 668                 if ((retval = image_read_section(ctx->image, section,
 669                         ctx->current_pc - ctx->image->sections[section].base_address,
 670                         4, buf, &size_read)) != ERROR_OK)
 671                 {
 672                         LOG_ERROR("error while reading instruction");
 673                         return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
 674                 }
 675                 opcode = target_buffer_get_u32(ctx->target, buf);
 676                 arm_evaluate_opcode(opcode, ctx->current_pc, instruction);
 677         }
 678         else if (ctx->core_state == ARM_STATE_THUMB)
 679         {
 680                 uint8_t buf[2];
 681                 if ((retval = image_read_section(ctx->image, section,
 682                         ctx->current_pc - ctx->image->sections[section].base_address,
 683                         2, buf, &size_read)) != ERROR_OK)
 684                 {
 685                         LOG_ERROR("error while reading instruction");
 686                         return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
 687                 }
 688                 opcode = target_buffer_get_u16(ctx->target, buf);
 689                 thumb_evaluate_opcode(opcode, ctx->current_pc, instruction);
 690         }
 691         else if (ctx->core_state == ARM_STATE_JAZELLE)
 692         {
 693                 LOG_ERROR("BUG: tracing of jazelle code not supported");
 694                 return ERROR_FAIL;
 695         }
 696         else
 697         {
 698                 LOG_ERROR("BUG: unknown core state encountered");
 699                 return ERROR_FAIL;
 700         }
 701
 702         return ERROR_OK;
 703 }
 704
 705 static int etmv1_next_packet(struct etm_context *ctx, uint8_t *packet, int apo)
 706 {
 707         while (ctx->data_index < ctx->trace_depth)
 708         {
 709                 /* if the caller specified an address packet offset, skip until the
 710                  * we reach the n-th cycle marked with tracesync */
 711                 if (apo > 0)
 712                 {
 713                         if (ctx->trace_data[ctx->data_index].flags & ETMV1_TRACESYNC_CYCLE)
 714                                 apo--;
 715
 716                         if (apo > 0)
 717                         {
 718                                 ctx->data_index++;
 719                                 ctx->data_half = 0;
 720                         }
 721                         continue;
 722                 }
 723
 724                 /* no tracedata output during a TD cycle
 725                  * or in a trigger cycle */
 726                 if ((ctx->trace_data[ctx->data_index].pipestat == STAT_TD)
 727                         || (ctx->trace_data[ctx->data_index].flags & ETMV1_TRIGGER_CYCLE))
 728                 {
 729                         ctx->data_index++;
 730                         ctx->data_half = 0;
 731                         continue;
 732                 }
 733
 734                 /* FIXME there are more port widths than these... */
 735                 if ((ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_16BIT)
 736                 {
 737                         if (ctx->data_half == 0)
 738                         {
 739                                 *packet = ctx->trace_data[ctx->data_index].packet & 0xff;
 740                                 ctx->data_half = 1;
 741                         }
 742                         else
 743                         {
 744                                 *packet = (ctx->trace_data[ctx->data_index].packet & 0xff00) >> 8;
 745                                 ctx->data_half = 0;
 746                                 ctx->data_index++;
 747                         }
 748                 }
 749                 else if ((ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
 750                 {
 751                         *packet = ctx->trace_data[ctx->data_index].packet & 0xff;
 752                         ctx->data_index++;
 753                 }
 754                 else
 755                 {
 756                         /* on a 4-bit port, a packet will be output during two consecutive cycles */
 757                         if (ctx->data_index > (ctx->trace_depth - 2))
 758                                 return -1;
 759
 760                         *packet = ctx->trace_data[ctx->data_index].packet & 0xf;
 761                         *packet |= (ctx->trace_data[ctx->data_index + 1].packet & 0xf) << 4;
 762                         ctx->data_index += 2;
 763                 }
 764
 765                 return 0;
 766         }
 767
 768         return -1;
 769 }
 770
 771 static int etmv1_branch_address(struct etm_context *ctx)
 772 {
 773         int retval;
 774         uint8_t packet;
 775         int shift = 0;
 776         int apo;
 777         uint32_t i;
 778
 779         /* quit analysis if less than two cycles are left in the trace
 780          * because we can't extract the APO */
 781         if (ctx->data_index > (ctx->trace_depth - 2))
 782                 return -1;
 783
 784         /* a BE could be output during an APO cycle, skip the current
 785          * and continue with the new one */
 786         if (ctx->trace_data[ctx->pipe_index + 1].pipestat & 0x4)
 787                 return 1;
 788         if (ctx->trace_data[ctx->pipe_index + 2].pipestat & 0x4)
 789                 return 2;
 790
 791         /* address packet offset encoded in the next two cycles' pipestat bits */
 792         apo = ctx->trace_data[ctx->pipe_index + 1].pipestat & 0x3;
 793         apo |= (ctx->trace_data[ctx->pipe_index + 2].pipestat & 0x3) << 2;
 794
 795         /* count number of tracesync cycles between current pipe_index and data_index
 796          * i.e. the number of tracesyncs that data_index already passed by
 797          * to subtract them from the APO */
 798         for (i = ctx->pipe_index; i < ctx->data_index; i++)
 799         {
 800                 if (ctx->trace_data[ctx->pipe_index + 1].pipestat & ETMV1_TRACESYNC_CYCLE)
 801                         apo--;
 802         }
 803
 804         /* extract up to four 7-bit packets */
 805         do {
 806                 if ((retval = etmv1_next_packet(ctx, &packet, (shift == 0) ? apo + 1 : 0)) != 0)
 807                         return -1;
 808                 ctx->last_branch &= ~(0x7f << shift);
 809                 ctx->last_branch |= (packet & 0x7f) << shift;
 810                 shift += 7;
 811         } while ((packet & 0x80) && (shift < 28));
 812
 813         /* one last packet holding 4 bits of the address, plus the branch reason code */
 814         if ((shift == 28) && (packet & 0x80))
 815         {
 816                 if ((retval = etmv1_next_packet(ctx, &packet, 0)) != 0)
 817                         return -1;
 818                 ctx->last_branch &= 0x0fffffff;
 819                 ctx->last_branch |= (packet & 0x0f) << 28;
 820                 ctx->last_branch_reason = (packet & 0x70) >> 4;
 821                 shift += 4;
 822         }
 823         else
 824         {
 825                 ctx->last_branch_reason = 0;
 826         }
 827
 828         if (shift == 32)
 829         {
 830                 ctx->pc_ok = 1;
 831         }
 832
 833         /* if a full address was output, we might have branched into Jazelle state */
 834         if ((shift == 32) && (packet & 0x80))
 835         {
 836                 ctx->core_state = ARM_STATE_JAZELLE;
 837         }
 838         else
 839         {
 840                 /* if we didn't branch into Jazelle state, the current processor state is
 841                  * encoded in bit 0 of the branch target address */
 842                 if (ctx->last_branch & 0x1)
 843                 {
 844                         ctx->core_state = ARM_STATE_THUMB;
 845                         ctx->last_branch &= ~0x1;
 846                 }
 847                 else
 848                 {
 849                         ctx->core_state = ARM_STATE_ARM;
 850                         ctx->last_branch &= ~0x3;
 851                 }
 852         }
 853
 854         return 0;
 855 }
 856
 857 static int etmv1_data(struct etm_context *ctx, int size, uint32_t *data)
 858 {
 859         int j;
 860         uint8_t buf[4];
 861         int retval;
 862
 863         for (j = 0; j < size; j++)
 864         {
 865                 if ((retval = etmv1_next_packet(ctx, &buf[j], 0)) != 0)
 866                         return -1;
 867         }
 868
 869         if (size == 8)
 870         {
 871                 LOG_ERROR("TODO: add support for 64-bit values");
 872                 return -1;
 873         }
 874         else if (size == 4)
 875                 *data = target_buffer_get_u32(ctx->target, buf);
 876         else if (size == 2)
 877                 *data = target_buffer_get_u16(ctx->target, buf);
 878         else if (size == 1)
 879                 *data = buf[0];
 880         else
 881                 return -1;
 882
 883         return 0;
 884 }
 885
 886 static int etmv1_analyze_trace(struct etm_context *ctx, struct command_context *cmd_ctx)
 887 {
 888         int retval;
 889         struct arm_instruction instruction;
 890
 891         /* read the trace data if it wasn't read already */
 892         if (ctx->trace_depth == 0)
 893                 ctx->capture_driver->read_trace(ctx);
 894
 895         if (ctx->trace_depth == 0) {
 896                 command_print(cmd_ctx, "Trace is empty.");
 897                 return ERROR_OK;
 898         }
 899
 900         /* start at the beginning of the captured trace */
 901         ctx->pipe_index = 0;
 902         ctx->data_index = 0;
 903         ctx->data_half = 0;
 904
 905         /* neither the PC nor the data pointer are valid */
 906         ctx->pc_ok = 0;
 907         ctx->ptr_ok = 0;
 908
 909         while (ctx->pipe_index < ctx->trace_depth)
 910         {
 911                 uint8_t pipestat = ctx->trace_data[ctx->pipe_index].pipestat;
 912                 uint32_t next_pc = ctx->current_pc;
 913                 uint32_t old_data_index = ctx->data_index;
 914                 uint32_t old_data_half = ctx->data_half;
 915                 uint32_t old_index = ctx->pipe_index;
 916                 uint32_t last_instruction = ctx->last_instruction;
 917                 uint32_t cycles = 0;
 918                 int current_pc_ok = ctx->pc_ok;
 919
 920                 if (ctx->trace_data[ctx->pipe_index].flags & ETMV1_TRIGGER_CYCLE)
 921                 {
 922                         command_print(cmd_ctx, "--- trigger ---");
 923                 }
 924
 925                 /* instructions execute in IE/D or BE/D cycles */
 926                 if ((pipestat == STAT_IE) || (pipestat == STAT_ID))
 927                         ctx->last_instruction = ctx->pipe_index;
 928
 929                 /* if we don't have a valid pc skip until we reach an indirect branch */
 930                 if ((!ctx->pc_ok) && (pipestat != STAT_BE))
 931                 {
 932                         ctx->pipe_index++;
 933                         continue;
 934                 }
 935
 936                 /* any indirect branch could have interrupted instruction flow
 937                  * - the branch reason code could indicate a trace discontinuity
 938                  * - a branch to the exception vectors indicates an exception
 939                  */
 940                 if ((pipestat == STAT_BE) || (pipestat == STAT_BD))
 941                 {
 942                         /* backup current data index, to be able to consume the branch address
 943                          * before examining data address and values
 944                          */
 945                         old_data_index = ctx->data_index;
 946                         old_data_half = ctx->data_half;
 947
 948                         ctx->last_instruction = ctx->pipe_index;
 949
 950                         if ((retval = etmv1_branch_address(ctx)) != 0)
 951                         {
 952                                 /* negative return value from etmv1_branch_address means we ran out of packets,
 953                                  * quit analysing the trace */
 954                                 if (retval < 0)
 955                                         break;
 956
 957                                 /* a positive return values means the current branch was abandoned,
 958                                  * and a new branch was encountered in cycle ctx->pipe_index + retval;
 959                                  */
 960                                 LOG_WARNING("abandoned branch encountered, correctnes of analysis uncertain");
 961                                 ctx->pipe_index += retval;
 962                                 continue;
 963                         }
 964
 965                         /* skip over APO cycles */
 966                         ctx->pipe_index += 2;
 967
 968                         switch (ctx->last_branch_reason)
 969                         {
 970                                 case 0x0:       /* normal PC change */
 971                                         next_pc = ctx->last_branch;
 972                                         break;
 973                                 case 0x1:       /* tracing enabled */
 974                                         command_print(cmd_ctx, "--- tracing enabled at 0x%8.8" PRIx32 " ---", ctx->last_branch);
 975                                         ctx->current_pc = ctx->last_branch;
 976                                         ctx->pipe_index++;
 977                                         continue;
 978                                         break;
 979                                 case 0x2:       /* trace restarted after FIFO overflow */
 980                                         command_print(cmd_ctx, "--- trace restarted after FIFO overflow at 0x%8.8" PRIx32 " ---", ctx->last_branch);
 981                                         ctx->current_pc = ctx->last_branch;
 982                                         ctx->pipe_index++;
 983                                         continue;
 984                                         break;
 985                                 case 0x3:       /* exit from debug state */
 986                                         command_print(cmd_ctx, "--- exit from debug state at 0x%8.8" PRIx32 " ---", ctx->last_branch);
 987                                         ctx->current_pc = ctx->last_branch;
 988                                         ctx->pipe_index++;
 989                                         continue;
 990                                         break;
 991                                 case 0x4:       /* periodic synchronization point */
 992                                         next_pc = ctx->last_branch;
 993                                         /* if we had no valid PC prior to this synchronization point,
 994                                          * we have to move on with the next trace cycle
 995                                          */
 996                                         if (!current_pc_ok)
 997                                         {
 998                                                 command_print(cmd_ctx, "--- periodic synchronization point at 0x%8.8" PRIx32 " ---", next_pc);
 999                                                 ctx->current_pc = next_pc;
1000                                                 ctx->pipe_index++;
1001                                                 continue;
1002                                         }
1003                                         break;
1004                                 default:        /* reserved */
1005                                         LOG_ERROR("BUG: branch reason code 0x%" PRIx32 " is reserved", ctx->last_branch_reason);
1006                                         return ERROR_FAIL;
1007                         }
1008
1009                         /* if we got here the branch was a normal PC change
1010                          * (or a periodic synchronization point, which means the same for that matter)
1011                          * if we didn't accquire a complete PC continue with the next cycle
1012                          */
1013                         if (!ctx->pc_ok)
1014                                 continue;
1015
1016                         /* indirect branch to the exception vector means an exception occured */
1017                         if ((ctx->last_branch <= 0x20)
1018                                 || ((ctx->last_branch >= 0xffff0000) && (ctx->last_branch <= 0xffff0020)))
1019                         {
1020                                 if ((ctx->last_branch & 0xff) == 0x10)
1021                                 {
1022                                         command_print(cmd_ctx, "data abort");
1023                                 }
1024                                 else
1025                                 {
1026                                         command_print(cmd_ctx, "exception vector 0x%2.2" PRIx32 "", ctx->last_branch);
1027                                         ctx->current_pc = ctx->last_branch;
1028                                         ctx->pipe_index++;
1029                                         continue;
1030                                 }
1031                         }
1032                 }
1033
1034                 /* an instruction was executed (or not, depending on the condition flags)
1035                  * retrieve it from the image for displaying */
1036                 if (ctx->pc_ok && (pipestat != STAT_WT) && (pipestat != STAT_TD) &&
1037                         !(((pipestat == STAT_BE) || (pipestat == STAT_BD)) &&
1038                                 ((ctx->last_branch_reason != 0x0) && (ctx->last_branch_reason != 0x4))))
1039                 {
1040                         if ((retval = etm_read_instruction(ctx, &instruction)) != ERROR_OK)
1041                         {
1042                                 /* can't continue tracing with no image available */
1043                                 if (retval == ERROR_TRACE_IMAGE_UNAVAILABLE)
1044                                 {
1045                                         return retval;
1046                                 }
1047                                 else if (retval == ERROR_TRACE_INSTRUCTION_UNAVAILABLE)
1048                                 {
1049                                         /* TODO: handle incomplete images
1050                                          * for now we just quit the analsysis*/
1051                                         return retval;
1052                                 }
1053                         }
1054
1055                         cycles = old_index - last_instruction;
1056                 }
1057
1058                 if ((pipestat == STAT_ID) || (pipestat == STAT_BD))
1059                 {
1060                         uint32_t new_data_index = ctx->data_index;
1061                         uint32_t new_data_half = ctx->data_half;
1062
1063                         /* in case of a branch with data, the branch target address was consumed before
1064                          * we temporarily go back to the saved data index */
1065                         if (pipestat == STAT_BD)
1066                         {
1067                                 ctx->data_index = old_data_index;
1068                                 ctx->data_half = old_data_half;
1069                         }
1070
1071                         if (ctx->control & ETM_CTRL_TRACE_ADDR)
1072                         {
1073                                 uint8_t packet;
1074                                 int shift = 0;
1075
1076                                 do {
1077                                         if ((retval = etmv1_next_packet(ctx, &packet, 0)) != 0)
1078                                                 return ERROR_ETM_ANALYSIS_FAILED;
1079                                         ctx->last_ptr &= ~(0x7f << shift);
1080                                         ctx->last_ptr |= (packet & 0x7f) << shift;
1081                                         shift += 7;
1082                                 } while ((packet & 0x80) && (shift < 32));
1083
1084                                 if (shift >= 32)
1085                                         ctx->ptr_ok = 1;
1086
1087                                 if (ctx->ptr_ok)
1088                                 {
1089                                         command_print(cmd_ctx, "address: 0x%8.8" PRIx32 "", ctx->last_ptr);
1090                                 }
1091                         }
1092
1093                         if (ctx->control & ETM_CTRL_TRACE_DATA)
1094                         {
1095                                 if ((instruction.type == ARM_LDM) || (instruction.type == ARM_STM))
1096                                 {
1097                                         int i;
1098                                         for (i = 0; i < 16; i++)
1099                                         {
1100                                                 if (instruction.info.load_store_multiple.register_list & (1 << i))
1101                                                 {
1102                                                         uint32_t data;
1103                                                         if (etmv1_data(ctx, 4, &data) != 0)
1104                                                                 return ERROR_ETM_ANALYSIS_FAILED;
1105                                                         command_print(cmd_ctx, "data: 0x%8.8" PRIx32 "", data);
1106                                                 }
1107                                         }
1108                                 }
1109                                 else if ((instruction.type >= ARM_LDR) && (instruction.type <= ARM_STRH))
1110                                 {
1111                                         uint32_t data;
1112                                         if (etmv1_data(ctx, arm_access_size(&instruction), &data) != 0)
1113                                                 return ERROR_ETM_ANALYSIS_FAILED;
1114                                         command_print(cmd_ctx, "data: 0x%8.8" PRIx32 "", data);
1115                                 }
1116                         }
1117
1118                         /* restore data index after consuming BD address and data */
1119                         if (pipestat == STAT_BD)
1120                         {
1121                                 ctx->data_index = new_data_index;
1122                                 ctx->data_half = new_data_half;
1123                         }
1124                 }
1125
1126                 /* adjust PC */
1127                 if ((pipestat == STAT_IE) || (pipestat == STAT_ID))
1128                 {
1129                         if (((instruction.type == ARM_B) ||
1130                              (instruction.type == ARM_BL) ||
1131                              (instruction.type == ARM_BLX)) &&
1132                             (instruction.info.b_bl_bx_blx.target_address != 0xffffffff))
1133                         {
1134                                 next_pc = instruction.info.b_bl_bx_blx.target_address;
1135                         }
1136                         else
1137                         {
1138                                 next_pc += (ctx->core_state == ARM_STATE_ARM) ? 4 : 2;
1139                         }
1140                 }
1141                 else if (pipestat == STAT_IN)
1142                 {
1143                         next_pc += (ctx->core_state == ARM_STATE_ARM) ? 4 : 2;
1144                 }
1145
1146                 if ((pipestat != STAT_TD) && (pipestat != STAT_WT))
1147                 {
1148                         char cycles_text[32] = "";
1149
1150                         /* if the trace was captured with cycle accurate tracing enabled,
1151                          * output the number of cycles since the last executed instruction
1152                          */
1153                         if (ctx->control & ETM_CTRL_CYCLE_ACCURATE)
1154                         {
1155                                 snprintf(cycles_text, 32, " (%i %s)",
1156                                          (int)cycles,
1157                                         (cycles == 1) ? "cycle" : "cycles");
1158                         }
1159
1160                         command_print(cmd_ctx, "%s%s%s",
1161                                 instruction.text,
1162                                 (pipestat == STAT_IN) ? " (not executed)" : "",
1163                                 cycles_text);
1164
1165                         ctx->current_pc = next_pc;
1166
1167                         /* packets for an instruction don't start on or before the preceding
1168                          * functional pipestat (i.e. other than WT or TD)
1169                          */
1170                         if (ctx->data_index <= ctx->pipe_index)
1171                         {
1172                                 ctx->data_index = ctx->pipe_index + 1;
1173                                 ctx->data_half = 0;
1174                         }
1175                 }
1176
1177                 ctx->pipe_index += 1;
1178         }
1179
1180         return ERROR_OK;
1181 }
1182
1183 static COMMAND_HELPER(handle_etm_tracemode_command_update,
1184                 uint32_t *mode)
1185 {
1186         uint32_t tracemode;
1187
1188         /* what parts of data access are traced? */
1189         if (strcmp(CMD_ARGV[0], "none") == 0)
1190                 tracemode = 0;
1191         else if (strcmp(CMD_ARGV[0], "data") == 0)
1192                 tracemode = ETM_CTRL_TRACE_DATA;
1193         else if (strcmp(CMD_ARGV[0], "address") == 0)
1194                 tracemode = ETM_CTRL_TRACE_ADDR;
1195         else if (strcmp(CMD_ARGV[0], "all") == 0)
1196                 tracemode = ETM_CTRL_TRACE_DATA | ETM_CTRL_TRACE_ADDR;
1197         else
1198         {
1199                 command_print(CMD_CTX, "invalid option '%s'", CMD_ARGV[0]);
1200                 return ERROR_INVALID_ARGUMENTS;
1201         }
1202
1203         uint8_t context_id;
1204         COMMAND_PARSE_NUMBER(u8, CMD_ARGV[1], context_id);
1205         switch (context_id)
1206         {
1207         case 0:
1208                 tracemode |= ETM_CTRL_CONTEXTID_NONE;
1209                 break;
1210         case 8:
1211                 tracemode |= ETM_CTRL_CONTEXTID_8;
1212                 break;
1213         case 16:
1214                 tracemode |= ETM_CTRL_CONTEXTID_16;
1215                 break;
1216         case 32:
1217                 tracemode |= ETM_CTRL_CONTEXTID_32;
1218                 break;
1219         default:
1220                 command_print(CMD_CTX, "invalid option '%s'", CMD_ARGV[1]);
1221                 return ERROR_INVALID_ARGUMENTS;
1222         }
1223
1224         bool etmv1_cycle_accurate;
1225         COMMAND_PARSE_ENABLE(CMD_ARGV[2], etmv1_cycle_accurate);
1226         if (etmv1_cycle_accurate)
1227                 tracemode |= ETM_CTRL_CYCLE_ACCURATE;
1228
1229         bool etmv1_branch_output;
1230         COMMAND_PARSE_ENABLE(CMD_ARGV[3], etmv1_branch_output);
1231         if (etmv1_branch_output)
1232                 tracemode |= ETM_CTRL_BRANCH_OUTPUT;
1233
1234         /* IGNORED:
1235          *  - CPRT tracing (coprocessor register transfers)
1236          *  - debug request (causes debug entry on trigger)
1237          *  - stall on FIFOFULL (preventing tracedata lossage)
1238          */
1239         *mode = tracemode;
1240
1241         return ERROR_OK;
1242 }
1243
1244 COMMAND_HANDLER(handle_etm_tracemode_command)
1245 {
1246         struct target *target = get_current_target(CMD_CTX);
1247         struct arm *arm = target_to_arm(target);
1248         struct etm_context *etm;
1249
1250         if (!is_arm(arm)) {
1251                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1252                 return ERROR_FAIL;
1253         }
1254
1255         etm = arm->etm;
1256         if (!etm) {
1257                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1258                 return ERROR_FAIL;
1259         }
1260
1261         uint32_t tracemode = etm->control;
1262
1263         switch (CMD_ARGC)
1264         {
1265         case 0:
1266                 break;
1267         case 4:
1268                 CALL_COMMAND_HANDLER(handle_etm_tracemode_command_update,
1269                                 &tracemode);
1270                 break;
1271         default:
1272                 command_print(CMD_CTX, "usage: tracemode "
1273                                 "('none'|'data'|'address'|'all') "
1274                                 "context_id_bits "
1275                                 "('enable'|'disable') "
1276                                 "('enable'|'disable')"
1277                                 );
1278                 return ERROR_FAIL;
1279         }
1280
1281         /**
1282          * todo: fail if parameters were invalid for this hardware,
1283          * or couldn't be written; display actual hardware state...
1284          */
1285
1286         command_print(CMD_CTX, "current tracemode configuration:");
1287
1288         switch (tracemode & ETM_CTRL_TRACE_MASK)
1289         {
1290                 default:
1291                         command_print(CMD_CTX, "data tracing: none");
1292                         break;
1293                 case ETM_CTRL_TRACE_DATA:
1294                         command_print(CMD_CTX, "data tracing: data only");
1295                         break;
1296                 case ETM_CTRL_TRACE_ADDR:
1297                         command_print(CMD_CTX, "data tracing: address only");
1298                         break;
1299                 case ETM_CTRL_TRACE_DATA | ETM_CTRL_TRACE_ADDR:
1300                         command_print(CMD_CTX, "data tracing: address and data");
1301                         break;
1302         }
1303
1304         switch (tracemode & ETM_CTRL_CONTEXTID_MASK)
1305         {
1306                 case ETM_CTRL_CONTEXTID_NONE:
1307                         command_print(CMD_CTX, "contextid tracing: none");
1308                         break;
1309                 case ETM_CTRL_CONTEXTID_8:
1310                         command_print(CMD_CTX, "contextid tracing: 8 bit");
1311                         break;
1312                 case ETM_CTRL_CONTEXTID_16:
1313                         command_print(CMD_CTX, "contextid tracing: 16 bit");
1314                         break;
1315                 case ETM_CTRL_CONTEXTID_32:
1316                         command_print(CMD_CTX, "contextid tracing: 32 bit");
1317                         break;
1318         }
1319
1320         if (tracemode & ETM_CTRL_CYCLE_ACCURATE)
1321         {
1322                 command_print(CMD_CTX, "cycle-accurate tracing enabled");
1323         }
1324         else
1325         {
1326                 command_print(CMD_CTX, "cycle-accurate tracing disabled");
1327         }
1328
1329         if (tracemode & ETM_CTRL_BRANCH_OUTPUT)
1330         {
1331                 command_print(CMD_CTX, "full branch address output enabled");
1332         }
1333         else
1334         {
1335                 command_print(CMD_CTX, "full branch address output disabled");
1336         }
1337
1338 #define TRACEMODE_MASK ( \
1339           ETM_CTRL_CONTEXTID_MASK \
1340         | ETM_CTRL_BRANCH_OUTPUT \
1341         | ETM_CTRL_CYCLE_ACCURATE \
1342         | ETM_CTRL_TRACE_MASK \
1343         )
1344
1345         /* only update ETM_CTRL register if tracemode changed */
1346         if ((etm->control & TRACEMODE_MASK) != tracemode)
1347         {
1348                 struct reg *etm_ctrl_reg;
1349
1350                 etm_ctrl_reg = etm_reg_lookup(etm, ETM_CTRL);
1351                 if (!etm_ctrl_reg)
1352                         return ERROR_FAIL;
1353
1354                 etm->control &= ~TRACEMODE_MASK;
1355                 etm->control |= tracemode & TRACEMODE_MASK;
1356
1357                 buf_set_u32(etm_ctrl_reg->value, 0, 32, etm->control);
1358                 etm_store_reg(etm_ctrl_reg);
1359
1360                 /* invalidate old trace data */
1361                 etm->capture_status = TRACE_IDLE;
1362                 if (etm->trace_depth > 0)
1363                 {
1364                         free(etm->trace_data);
1365                         etm->trace_data = NULL;
1366                 }
1367                 etm->trace_depth = 0;
1368         }
1369
1370 #undef TRACEMODE_MASK
1371
1372         return ERROR_OK;
1373 }
1374
1375 COMMAND_HANDLER(handle_etm_config_command)
1376 {
1377         struct target *target;
1378         struct arm *arm;
1379         uint32_t portmode = 0x0;
1380         struct etm_context *etm_ctx;
1381         int i;
1382
1383         if (CMD_ARGC != 5)
1384                 return ERROR_COMMAND_SYNTAX_ERROR;
1385
1386         target = get_target(CMD_ARGV[0]);
1387         if (!target)
1388         {
1389                 LOG_ERROR("target '%s' not defined", CMD_ARGV[0]);
1390                 return ERROR_FAIL;
1391         }
1392
1393         arm = target_to_arm(target);
1394         if (!is_arm(arm)) {
1395                 command_print(CMD_CTX, "target '%s' is '%s'; not an ARM",
1396                                 target_name(target),
1397                                 target_type_name(target));
1398                 return ERROR_FAIL;
1399         }
1400
1401         /* FIXME for ETMv3.0 and above -- and we don't yet know what ETM
1402          * version we'll be using!! -- so we can't know how to validate
1403          * params yet.  "etm config" should likely be *AFTER* hookup...
1404          *
1405          *  - Many more widths might be supported ... and we can easily
1406          *    check whether our setting "took".
1407          *
1408          *  - The "clock" and "mode" bits are interpreted differently.
1409          *    See ARM IHI 0014O table 2-17 for the old behavior, and
1410          *    table 2-18 for the new.  With ETB it's best to specify
1411          *    "normal full" ...
1412          */
1413         uint8_t port_width;
1414         COMMAND_PARSE_NUMBER(u8, CMD_ARGV[1], port_width);
1415         switch (port_width)
1416         {
1417                 /* before ETMv3.0 */
1418                 case 4:
1419                         portmode |= ETM_PORT_4BIT;
1420                         break;
1421                 case 8:
1422                         portmode |= ETM_PORT_8BIT;
1423                         break;
1424                 case 16:
1425                         portmode |= ETM_PORT_16BIT;
1426                         break;
1427                 /* ETMv3.0 and later*/
1428                 case 24:
1429                         portmode |= ETM_PORT_24BIT;
1430                         break;
1431                 case 32:
1432                         portmode |= ETM_PORT_32BIT;
1433                         break;
1434                 case 48:
1435                         portmode |= ETM_PORT_48BIT;
1436                         break;
1437                 case 64:
1438                         portmode |= ETM_PORT_64BIT;
1439                         break;
1440                 case 1:
1441                         portmode |= ETM_PORT_1BIT;
1442                         break;
1443                 case 2:
1444                         portmode |= ETM_PORT_2BIT;
1445                         break;
1446                 default:
1447                         command_print(CMD_CTX,
1448                                 "unsupported ETM port width '%s'", CMD_ARGV[1]);
1449                         return ERROR_FAIL;
1450         }
1451
1452         if (strcmp("normal", CMD_ARGV[2]) == 0)
1453         {
1454                 portmode |= ETM_PORT_NORMAL;
1455         }
1456         else if (strcmp("multiplexed", CMD_ARGV[2]) == 0)
1457         {
1458                 portmode |= ETM_PORT_MUXED;
1459         }
1460         else if (strcmp("demultiplexed", CMD_ARGV[2]) == 0)
1461         {
1462                 portmode |= ETM_PORT_DEMUXED;
1463         }
1464         else
1465         {
1466                 command_print(CMD_CTX, "unsupported ETM port mode '%s', must be 'normal', 'multiplexed' or 'demultiplexed'", CMD_ARGV[2]);
1467                 return ERROR_FAIL;
1468         }
1469
1470         if (strcmp("half", CMD_ARGV[3]) == 0)
1471         {
1472                 portmode |= ETM_PORT_HALF_CLOCK;
1473         }
1474         else if (strcmp("full", CMD_ARGV[3]) == 0)
1475         {
1476                 portmode |= ETM_PORT_FULL_CLOCK;
1477         }
1478         else
1479         {
1480                 command_print(CMD_CTX, "unsupported ETM port clocking '%s', must be 'full' or 'half'", CMD_ARGV[3]);
1481                 return ERROR_FAIL;
1482         }
1483
1484         etm_ctx = calloc(1, sizeof(struct etm_context));
1485         if (!etm_ctx) {
1486                 LOG_DEBUG("out of memory");
1487                 return ERROR_FAIL;
1488         }
1489
1490         for (i = 0; etm_capture_drivers[i]; i++)
1491         {
1492                 if (strcmp(CMD_ARGV[4], etm_capture_drivers[i]->name) == 0)
1493                 {
1494                         int retval = register_commands(CMD_CTX, NULL,
1495                                         etm_capture_drivers[i]->commands);
1496                         if (ERROR_OK != retval)
1497                         {
1498                                 free(etm_ctx);
1499                                 return retval;
1500                         }
1501
1502                         etm_ctx->capture_driver = etm_capture_drivers[i];
1503
1504                         break;
1505                 }
1506         }
1507
1508         if (!etm_capture_drivers[i])
1509         {
1510                 /* no supported capture driver found, don't register an ETM */
1511                 free(etm_ctx);
1512                 LOG_ERROR("trace capture driver '%s' not found", CMD_ARGV[4]);
1513                 return ERROR_FAIL;
1514         }
1515
1516         etm_ctx->target = target;
1517         etm_ctx->trace_data = NULL;
1518         etm_ctx->control = portmode;
1519         etm_ctx->core_state = ARM_STATE_ARM;
1520
1521         arm->etm = etm_ctx;
1522
1523         return etm_register_user_commands(CMD_CTX);
1524 }
1525
1526 COMMAND_HANDLER(handle_etm_info_command)
1527 {
1528         struct target *target;
1529         struct arm *arm;
1530         struct etm_context *etm;
1531         struct reg *etm_sys_config_reg;
1532         int max_port_size;
1533         uint32_t config;
1534
1535         target = get_current_target(CMD_CTX);
1536         arm = target_to_arm(target);
1537         if (!is_arm(arm))
1538         {
1539                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1540                 return ERROR_FAIL;
1541         }
1542
1543         etm = arm->etm;
1544         if (!etm)
1545         {
1546                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1547                 return ERROR_FAIL;
1548         }
1549
1550         command_print(CMD_CTX, "ETM v%d.%d",
1551                         etm->bcd_vers >> 4, etm->bcd_vers & 0xf);
1552         command_print(CMD_CTX, "pairs of address comparators: %i",
1553                         (int) (etm->config >> 0) & 0x0f);
1554         command_print(CMD_CTX, "data comparators: %i",
1555                         (int) (etm->config >> 4) & 0x0f);
1556         command_print(CMD_CTX, "memory map decoders: %i",
1557                         (int) (etm->config >> 8) & 0x1f);
1558         command_print(CMD_CTX, "number of counters: %i",
1559                         (int) (etm->config >> 13) & 0x07);
1560         command_print(CMD_CTX, "sequencer %spresent",
1561                         (int) (etm->config & (1 << 16)) ? "" : "not ");
1562         command_print(CMD_CTX, "number of ext. inputs: %i",
1563                         (int) (etm->config >> 17) & 0x07);
1564         command_print(CMD_CTX, "number of ext. outputs: %i",
1565                         (int) (etm->config >> 20) & 0x07);
1566         command_print(CMD_CTX, "FIFO full %spresent",
1567                         (int) (etm->config & (1 << 23)) ? "" : "not ");
1568         if (etm->bcd_vers < 0x20)
1569                 command_print(CMD_CTX, "protocol version: %i",
1570                                 (int) (etm->config >> 28) & 0x07);
1571         else {
1572                 command_print(CMD_CTX,
1573                                 "coprocessor and memory access %ssupported",
1574                                 (etm->config & (1 << 26)) ? "" : "not ");
1575                 command_print(CMD_CTX, "trace start/stop %spresent",
1576                                 (etm->config & (1 << 26)) ? "" : "not ");
1577                 command_print(CMD_CTX, "number of context comparators: %i",
1578                                 (int) (etm->config >> 24) & 0x03);
1579         }
1580
1581         /* SYS_CONFIG isn't present before ETMv1.2 */
1582         etm_sys_config_reg = etm_reg_lookup(etm, ETM_SYS_CONFIG);
1583         if (!etm_sys_config_reg)
1584                 return ERROR_OK;
1585
1586         etm_get_reg(etm_sys_config_reg);
1587         config = buf_get_u32(etm_sys_config_reg->value, 0, 32);
1588
1589         LOG_DEBUG("ETM SYS CONFIG %08x", (unsigned) config);
1590
1591         max_port_size = config & 0x7;
1592         if (etm->bcd_vers >= 0x30)
1593                 max_port_size |= (config >> 6) & 0x08;
1594         switch (max_port_size)
1595         {
1596                 /* before ETMv3.0 */
1597                 case 0:
1598                         max_port_size = 4;
1599                         break;
1600                 case 1:
1601                         max_port_size = 8;
1602                         break;
1603                 case 2:
1604                         max_port_size = 16;
1605                         break;
1606                 /* ETMv3.0 and later*/
1607                 case 3:
1608                         max_port_size = 24;
1609                         break;
1610                 case 4:
1611                         max_port_size = 32;
1612                         break;
1613                 case 5:
1614                         max_port_size = 48;
1615                         break;
1616                 case 6:
1617                         max_port_size = 64;
1618                         break;
1619                 case 8:
1620                         max_port_size = 1;
1621                         break;
1622                 case 9:
1623                         max_port_size = 2;
1624                         break;
1625                 default:
1626                         LOG_ERROR("Illegal max_port_size");
1627                         return ERROR_FAIL;
1628         }
1629         command_print(CMD_CTX, "max. port size: %i", max_port_size);
1630
1631         if (etm->bcd_vers < 0x30) {
1632                 command_print(CMD_CTX, "half-rate clocking %ssupported",
1633                                 (config & (1 << 3)) ? "" : "not ");
1634                 command_print(CMD_CTX, "full-rate clocking %ssupported",
1635                                 (config & (1 << 4)) ? "" : "not ");
1636                 command_print(CMD_CTX, "normal trace format %ssupported",
1637                                 (config & (1 << 5)) ? "" : "not ");
1638                 command_print(CMD_CTX, "multiplex trace format %ssupported",
1639                                 (config & (1 << 6)) ? "" : "not ");
1640                 command_print(CMD_CTX, "demultiplex trace format %ssupported",
1641                                 (config & (1 << 7)) ? "" : "not ");
1642         } else {
1643                 /* REVISIT show which size and format are selected ... */
1644                 command_print(CMD_CTX, "current port size %ssupported",
1645                                 (config & (1 << 10)) ? "" : "not ");
1646                 command_print(CMD_CTX, "current trace format %ssupported",
1647                                 (config & (1 << 11)) ? "" : "not ");
1648         }
1649         if (etm->bcd_vers >= 0x21)
1650                 command_print(CMD_CTX, "fetch comparisons %ssupported",
1651                                 (config & (1 << 17)) ? "not " : "");
1652         command_print(CMD_CTX, "FIFO full %ssupported",
1653                         (config & (1 << 8)) ? "" : "not ");
1654
1655         return ERROR_OK;
1656 }
1657
1658 COMMAND_HANDLER(handle_etm_status_command)
1659 {
1660         struct target *target;
1661         struct arm *arm;
1662         struct etm_context *etm;
1663         trace_status_t trace_status;
1664
1665         target = get_current_target(CMD_CTX);
1666         arm = target_to_arm(target);
1667         if (!is_arm(arm))
1668         {
1669                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1670                 return ERROR_FAIL;
1671         }
1672
1673         etm = arm->etm;
1674         if (!etm)
1675         {
1676                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1677                 return ERROR_FAIL;
1678         }
1679
1680         /* ETM status */
1681         if (etm->bcd_vers >= 0x11) {
1682                 struct reg *reg;
1683
1684                 reg = etm_reg_lookup(etm, ETM_STATUS);
1685                 if (!reg)
1686                         return ERROR_FAIL;
1687                 if (etm_get_reg(reg) == ERROR_OK) {
1688                         unsigned s = buf_get_u32(reg->value, 0, reg->size);
1689
1690                         command_print(CMD_CTX, "etm: %s%s%s%s",
1691                                 /* bit(1) == progbit */
1692                                 (etm->bcd_vers >= 0x12)
1693                                         ? ((s & (1 << 1))
1694                                                 ? "disabled" : "enabled")
1695                                         : "?",
1696                                 ((s & (1 << 3)) && etm->bcd_vers >= 0x31)
1697                                         ? " triggered" : "",
1698                                 ((s & (1 << 2)) && etm->bcd_vers >= 0x12)
1699                                         ? " start/stop" : "",
1700                                 ((s & (1 << 0)) && etm->bcd_vers >= 0x11)
1701                                         ? " untraced-overflow" : "");
1702                 } /* else ignore and try showing trace port status */
1703         }
1704
1705         /* Trace Port Driver status */
1706         trace_status = etm->capture_driver->status(etm);
1707         if (trace_status == TRACE_IDLE)
1708         {
1709                 command_print(CMD_CTX, "%s: idle", etm->capture_driver->name);
1710         }
1711         else
1712         {
1713                 static char *completed = " completed";
1714                 static char *running = " is running";
1715                 static char *overflowed = ", overflowed";
1716                 static char *triggered = ", triggered";
1717
1718                 command_print(CMD_CTX, "%s: trace collection%s%s%s",
1719                         etm->capture_driver->name,
1720                         (trace_status & TRACE_RUNNING) ? running : completed,
1721                         (trace_status & TRACE_OVERFLOWED) ? overflowed : "",
1722                         (trace_status & TRACE_TRIGGERED) ? triggered : "");
1723
1724                 if (etm->trace_depth > 0)
1725                 {
1726                         command_print(CMD_CTX, "%i frames of trace data read",
1727                                         (int)(etm->trace_depth));
1728                 }
1729         }
1730
1731         return ERROR_OK;
1732 }
1733
1734 COMMAND_HANDLER(handle_etm_image_command)
1735 {
1736         struct target *target;
1737         struct arm *arm;
1738         struct etm_context *etm_ctx;
1739
1740         if (CMD_ARGC < 1)
1741         {
1742                 command_print(CMD_CTX, "usage: etm image <file> [base address] [type]");
1743                 return ERROR_FAIL;
1744         }
1745
1746         target = get_current_target(CMD_CTX);
1747         arm = target_to_arm(target);
1748         if (!is_arm(arm))
1749         {
1750                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1751                 return ERROR_FAIL;
1752         }
1753
1754         etm_ctx = arm->etm;
1755         if (!etm_ctx)
1756         {
1757                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1758                 return ERROR_FAIL;
1759         }
1760
1761         if (etm_ctx->image)
1762         {
1763                 image_close(etm_ctx->image);
1764                 free(etm_ctx->image);
1765                 command_print(CMD_CTX, "previously loaded image found and closed");
1766         }
1767
1768         etm_ctx->image = malloc(sizeof(struct image));
1769         etm_ctx->image->base_address_set = 0;
1770         etm_ctx->image->start_address_set = 0;
1771
1772         /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
1773         if (CMD_ARGC >= 2)
1774         {
1775                 etm_ctx->image->base_address_set = 1;
1776                 COMMAND_PARSE_NUMBER(llong, CMD_ARGV[1], etm_ctx->image->base_address);
1777         }
1778         else
1779         {
1780                 etm_ctx->image->base_address_set = 0;
1781         }
1782
1783         if (image_open(etm_ctx->image, CMD_ARGV[0], (CMD_ARGC >= 3) ? CMD_ARGV[2] : NULL) != ERROR_OK)
1784         {
1785                 free(etm_ctx->image);
1786                 etm_ctx->image = NULL;
1787                 return ERROR_FAIL;
1788         }
1789
1790         return ERROR_OK;
1791 }
1792
1793 COMMAND_HANDLER(handle_etm_dump_command)
1794 {
1795         struct fileio file;
1796         struct target *target;
1797         struct arm *arm;
1798         struct etm_context *etm_ctx;
1799         uint32_t i;
1800
1801         if (CMD_ARGC != 1)
1802         {
1803                 command_print(CMD_CTX, "usage: etm dump <file>");
1804                 return ERROR_FAIL;
1805         }
1806
1807         target = get_current_target(CMD_CTX);
1808         arm = target_to_arm(target);
1809         if (!is_arm(arm))
1810         {
1811                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1812                 return ERROR_FAIL;
1813         }
1814
1815         etm_ctx = arm->etm;
1816         if (!etm_ctx)
1817         {
1818                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1819                 return ERROR_FAIL;
1820         }
1821
1822         if (etm_ctx->capture_driver->status == TRACE_IDLE)
1823         {
1824                 command_print(CMD_CTX, "trace capture wasn't enabled, no trace data captured");
1825                 return ERROR_OK;
1826         }
1827
1828         if (etm_ctx->capture_driver->status(etm_ctx) & TRACE_RUNNING)
1829         {
1830                 /* TODO: if on-the-fly capture is to be supported, this needs to be changed */
1831                 command_print(CMD_CTX, "trace capture not completed");
1832                 return ERROR_FAIL;
1833         }
1834
1835         /* read the trace data if it wasn't read already */
1836         if (etm_ctx->trace_depth == 0)
1837                 etm_ctx->capture_driver->read_trace(etm_ctx);
1838
1839         if (fileio_open(&file, CMD_ARGV[0], FILEIO_WRITE, FILEIO_BINARY) != ERROR_OK)
1840         {
1841                 return ERROR_FAIL;
1842         }
1843
1844         fileio_write_u32(&file, etm_ctx->capture_status);
1845         fileio_write_u32(&file, etm_ctx->control);
1846         fileio_write_u32(&file, etm_ctx->trace_depth);
1847
1848         for (i = 0; i < etm_ctx->trace_depth; i++)
1849         {
1850                 fileio_write_u32(&file, etm_ctx->trace_data[i].pipestat);
1851                 fileio_write_u32(&file, etm_ctx->trace_data[i].packet);
1852                 fileio_write_u32(&file, etm_ctx->trace_data[i].flags);
1853         }
1854
1855         fileio_close(&file);
1856
1857         return ERROR_OK;
1858 }
1859
1860 COMMAND_HANDLER(handle_etm_load_command)
1861 {
1862         struct fileio file;
1863         struct target *target;
1864         struct arm *arm;
1865         struct etm_context *etm_ctx;
1866         uint32_t i;
1867
1868         if (CMD_ARGC != 1)
1869         {
1870                 command_print(CMD_CTX, "usage: etm load <file>");
1871                 return ERROR_FAIL;
1872         }
1873
1874         target = get_current_target(CMD_CTX);
1875         arm = target_to_arm(target);
1876         if (!is_arm(arm))
1877         {
1878                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1879                 return ERROR_FAIL;
1880         }
1881
1882         etm_ctx = arm->etm;
1883         if (!etm_ctx)
1884         {
1885                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1886                 return ERROR_FAIL;
1887         }
1888
1889         if (etm_ctx->capture_driver->status(etm_ctx) & TRACE_RUNNING)
1890         {
1891                 command_print(CMD_CTX, "trace capture running, stop first");
1892                 return ERROR_FAIL;
1893         }
1894
1895         if (fileio_open(&file, CMD_ARGV[0], FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
1896         {
1897                 return ERROR_FAIL;
1898         }
1899
1900         int filesize;
1901         int retval = fileio_size(&file, &filesize);
1902         if (retval != ERROR_OK)
1903         {
1904                 fileio_close(&file);
1905                 return retval;
1906         }
1907
1908         if (filesize % 4)
1909         {
1910                 command_print(CMD_CTX, "size isn't a multiple of 4, no valid trace data");
1911                 fileio_close(&file);
1912                 return ERROR_FAIL;
1913         }
1914
1915         if (etm_ctx->trace_depth > 0)
1916         {
1917                 free(etm_ctx->trace_data);
1918                 etm_ctx->trace_data = NULL;
1919         }
1920
1921         {
1922           uint32_t tmp;
1923           fileio_read_u32(&file, &tmp); etm_ctx->capture_status = tmp;
1924           fileio_read_u32(&file, &tmp); etm_ctx->control = tmp;
1925           fileio_read_u32(&file, &etm_ctx->trace_depth);
1926         }
1927         etm_ctx->trace_data = malloc(sizeof(struct etmv1_trace_data) * etm_ctx->trace_depth);
1928         if (etm_ctx->trace_data == NULL)
1929         {
1930                 command_print(CMD_CTX, "not enough memory to perform operation");
1931                 fileio_close(&file);
1932                 return ERROR_FAIL;
1933         }
1934
1935         for (i = 0; i < etm_ctx->trace_depth; i++)
1936         {
1937                 uint32_t pipestat, packet, flags;
1938                 fileio_read_u32(&file, &pipestat);
1939                 fileio_read_u32(&file, &packet);
1940                 fileio_read_u32(&file, &flags);
1941                 etm_ctx->trace_data[i].pipestat = pipestat & 0xff;
1942                 etm_ctx->trace_data[i].packet = packet & 0xffff;
1943                 etm_ctx->trace_data[i].flags = flags;
1944         }
1945
1946         fileio_close(&file);
1947
1948         return ERROR_OK;
1949 }
1950
1951 COMMAND_HANDLER(handle_etm_start_command)
1952 {
1953         struct target *target;
1954         struct arm *arm;
1955         struct etm_context *etm_ctx;
1956         struct reg *etm_ctrl_reg;
1957
1958         target = get_current_target(CMD_CTX);
1959         arm = target_to_arm(target);
1960         if (!is_arm(arm))
1961         {
1962                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1963                 return ERROR_FAIL;
1964         }
1965
1966         etm_ctx = arm->etm;
1967         if (!etm_ctx)
1968         {
1969                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1970                 return ERROR_FAIL;
1971         }
1972
1973         /* invalidate old tracing data */
1974         etm_ctx->capture_status = TRACE_IDLE;
1975         if (etm_ctx->trace_depth > 0)
1976         {
1977                 free(etm_ctx->trace_data);
1978                 etm_ctx->trace_data = NULL;
1979         }
1980         etm_ctx->trace_depth = 0;
1981
1982         etm_ctrl_reg = etm_reg_lookup(etm_ctx, ETM_CTRL);
1983         if (!etm_ctrl_reg)
1984                 return ERROR_FAIL;
1985
1986         etm_get_reg(etm_ctrl_reg);
1987
1988         /* Clear programming bit (10), set port selection bit (11) */
1989         buf_set_u32(etm_ctrl_reg->value, 10, 2, 0x2);
1990
1991         etm_store_reg(etm_ctrl_reg);
1992         jtag_execute_queue();
1993
1994         etm_ctx->capture_driver->start_capture(etm_ctx);
1995
1996         return ERROR_OK;
1997 }
1998
1999 COMMAND_HANDLER(handle_etm_stop_command)
2000 {
2001         struct target *target;
2002         struct arm *arm;
2003         struct etm_context *etm_ctx;
2004         struct reg *etm_ctrl_reg;
2005
2006         target = get_current_target(CMD_CTX);
2007         arm = target_to_arm(target);
2008         if (!is_arm(arm))
2009         {
2010                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
2011                 return ERROR_FAIL;
2012         }
2013
2014         etm_ctx = arm->etm;
2015         if (!etm_ctx)
2016         {
2017                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
2018                 return ERROR_FAIL;
2019         }
2020
2021         etm_ctrl_reg = etm_reg_lookup(etm_ctx, ETM_CTRL);
2022         if (!etm_ctrl_reg)
2023                 return ERROR_FAIL;
2024
2025         etm_get_reg(etm_ctrl_reg);
2026
2027         /* Set programming bit (10), clear port selection bit (11) */
2028         buf_set_u32(etm_ctrl_reg->value, 10, 2, 0x1);
2029
2030         etm_store_reg(etm_ctrl_reg);
2031         jtag_execute_queue();
2032
2033         etm_ctx->capture_driver->stop_capture(etm_ctx);
2034
2035         return ERROR_OK;
2036 }
2037
2038 COMMAND_HANDLER(handle_etm_trigger_debug_command)
2039 {
2040         struct target *target;
2041         struct arm *arm;
2042         struct etm_context *etm;
2043
2044         target = get_current_target(CMD_CTX);
2045         arm = target_to_arm(target);
2046         if (!is_arm(arm))
2047         {
2048                 command_print(CMD_CTX, "ETM: %s isn't an ARM",
2049                                 target_name(target));
2050                 return ERROR_FAIL;
2051         }
2052
2053         etm = arm->etm;
2054         if (!etm)
2055         {
2056                 command_print(CMD_CTX, "ETM: no ETM configured for %s",
2057                                 target_name(target));
2058                 return ERROR_FAIL;
2059         }
2060
2061         if (CMD_ARGC == 1) {
2062                 struct reg *etm_ctrl_reg;
2063                 bool dbgrq;
2064
2065                 etm_ctrl_reg = etm_reg_lookup(etm, ETM_CTRL);
2066                 if (!etm_ctrl_reg)
2067                         return ERROR_FAIL;
2068
2069                 COMMAND_PARSE_ENABLE(CMD_ARGV[0], dbgrq);
2070                 if (dbgrq)
2071                         etm->control |= ETM_CTRL_DBGRQ;
2072                 else
2073                         etm->control &= ~ETM_CTRL_DBGRQ;
2074
2075                 /* etm->control will be written to hardware
2076                  * the next time an "etm start" is issued.
2077                  */
2078                 buf_set_u32(etm_ctrl_reg->value, 0, 32, etm->control);
2079         }
2080
2081         command_print(CMD_CTX, "ETM: %s debug halt",
2082                         (etm->control & ETM_CTRL_DBGRQ)
2083                                 ? "triggers"
2084                                 : "does not trigger");
2085         return ERROR_OK;
2086 }
2087
2088 COMMAND_HANDLER(handle_etm_analyze_command)
2089 {
2090         struct target *target;
2091         struct arm *arm;
2092         struct etm_context *etm_ctx;
2093         int retval;
2094
2095         target = get_current_target(CMD_CTX);
2096         arm = target_to_arm(target);
2097         if (!is_arm(arm))
2098         {
2099                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
2100                 return ERROR_FAIL;
2101         }
2102
2103         etm_ctx = arm->etm;
2104         if (!etm_ctx)
2105         {
2106                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
2107                 return ERROR_FAIL;
2108         }
2109
2110         if ((retval = etmv1_analyze_trace(etm_ctx, CMD_CTX)) != ERROR_OK)
2111         {
2112                 /* FIX! error should be reported inside etmv1_analyze_trace() */
2113                 switch (retval)
2114                 {
2115                         case ERROR_ETM_ANALYSIS_FAILED:
2116                                 command_print(CMD_CTX, "further analysis failed (corrupted trace data or just end of data");
2117                                 break;
2118                         case ERROR_TRACE_INSTRUCTION_UNAVAILABLE:
2119                                 command_print(CMD_CTX, "no instruction for current address available, analysis aborted");
2120                                 break;
2121                         case ERROR_TRACE_IMAGE_UNAVAILABLE:
2122                                 command_print(CMD_CTX, "no image available for trace analysis");
2123                                 break;
2124                         default:
2125                                 command_print(CMD_CTX, "unknown error");
2126                 }
2127         }
2128
2129         return retval;
2130 }
2131
2132 static const struct command_registration etm_config_command_handlers[] = {
2133         {
2134                 /* NOTE:  with ADIv5, ETMs are accessed by DAP operations,
2135                  * possibly over SWD, not JTAG scanchain 6 of 'target'.
2136                  *
2137                  * Also, these parameters don't match ETM v3+ modules...
2138                  */
2139                 .name = "config",
2140                 .handler = handle_etm_config_command,
2141                 .mode = COMMAND_CONFIG,
2142                 .help = "Set up ETM output port.",
2143                 .usage = "target port_width port_mode clocking capture_driver",
2144         },
2145         COMMAND_REGISTRATION_DONE
2146 };
2147 const struct command_registration etm_command_handlers[] = {
2148         {
2149                 .name = "etm",
2150                 .mode = COMMAND_ANY,
2151                 .help = "Emebdded Trace Macrocell command group",
2152                 .chain = etm_config_command_handlers,
2153         },
2154         COMMAND_REGISTRATION_DONE
2155 };
2156
2157 static const struct command_registration etm_exec_command_handlers[] = {
2158         {
2159                 .name = "tracemode",
2160                 .handler = handle_etm_tracemode_command,
2161                 .mode = COMMAND_EXEC,
2162                 .help = "configure/display trace mode",
2163                 .usage = "('none'|'data'|'address'|'all') "
2164                         "context_id_bits "
2165                         "['enable'|'disable'] "
2166                         "['enable'|'disable']",
2167         },
2168         {
2169                 .name = "info",
2170                 .handler = handle_etm_info_command,
2171                 .mode = COMMAND_EXEC,
2172                 .help = "display info about the current target's ETM",
2173         },
2174         {
2175                 .name = "status",
2176                 .handler = handle_etm_status_command,
2177                 .mode = COMMAND_EXEC,
2178                 .help = "display current target's ETM status",
2179         },
2180         {
2181                 .name = "start",
2182                 .handler = handle_etm_start_command,
2183                 .mode = COMMAND_EXEC,
2184                 .help = "start ETM trace collection",
2185         },
2186         {
2187                 .name = "stop",
2188                 .handler = handle_etm_stop_command,
2189                 .mode = COMMAND_EXEC,
2190                 .help = "stop ETM trace collection",
2191         },
2192         {
2193                 .name = "trigger_debug",
2194                 .handler = handle_etm_trigger_debug_command,
2195                 .mode = COMMAND_EXEC,
2196                 .help = "enable/disable debug entry on trigger",
2197                 .usage = "['enable'|'disable']",
2198         },
2199         {
2200                 .name = "analyze",
2201                 .handler = handle_etm_analyze_command,
2202                 .mode = COMMAND_EXEC,
2203                 .help = "analyze collected ETM trace",
2204         },
2205         {
2206                 .name = "image",
2207                 .handler = handle_etm_image_command,
2208                 .mode = COMMAND_EXEC,
2209                 .help = "load image from file with optional offset",
2210                 .usage = "filename [offset]",
2211         },
2212         {
2213                 .name = "dump",
2214                 .handler = handle_etm_dump_command,
2215                 .mode = COMMAND_EXEC,
2216                 .help = "dump captured trace data to file",
2217                 .usage = "filename",
2218         },
2219         {
2220                 .name = "load",
2221                 .handler = handle_etm_load_command,
2222                 .mode = COMMAND_EXEC,
2223                 .help = "load trace data for analysis <file>",
2224         },
2225         COMMAND_REGISTRATION_DONE
2226 };
2227
2228 static int etm_register_user_commands(struct command_context *cmd_ctx)
2229 {
2230         struct command *etm_cmd = command_find_in_context(cmd_ctx, "etm");
2231         return register_commands(cmd_ctx, etm_cmd, etm_exec_command_handlers);
2232 }