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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  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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         { 0, 0, 0, 0, NULL }
 148 #undef ADDR_COMPARATOR
 149 };
 150
 151 static const struct etm_reg_info etm_data_comp[] = {
 152         /* Data Value Comparators (NOTE: odd addresses are reserved) */
 153 #define DATA_COMPARATOR(i) \
 154                 { ETM_DATA_COMPARATOR_VALUE + 2*(i) - 1, 32, WO, 0x10, \
 155                                 "ETM_data_" #i "_comparator_value", }, \
 156                 { ETM_DATA_COMPARATOR_MASK + 2*(i) - 1, 32, WO, 0x10, \
 157                                 "ETM_data_" #i "_comparator_mask", }
 158         DATA_COMPARATOR(1),
 159         DATA_COMPARATOR(2),
 160         DATA_COMPARATOR(3),
 161         DATA_COMPARATOR(4),
 162         DATA_COMPARATOR(5),
 163         DATA_COMPARATOR(6),
 164         DATA_COMPARATOR(7),
 165         DATA_COMPARATOR(8),
 166         { 0, 0, 0, 0, NULL }
 167 #undef DATA_COMPARATOR
 168 };
 169
 170 static const struct etm_reg_info etm_counters[] = {
 171 #define ETM_COUNTER(i) \
 172                 { ETM_COUNTER_RELOAD_VALUE + (i) - 1, 16, WO, 0x10, \
 173                                 "ETM_counter_" #i "_reload_value", }, \
 174                 { ETM_COUNTER_ENABLE + (i) - 1, 18, WO, 0x10, \
 175                                 "ETM_counter_" #i "_enable", }, \
 176                 { ETM_COUNTER_RELOAD_EVENT + (i) - 1, 17, WO, 0x10, \
 177                                 "ETM_counter_" #i "_reload_event", }, \
 178                 { ETM_COUNTER_VALUE + (i) - 1, 16, RO, 0x10, \
 179                                 "ETM_counter_" #i "_value", }
 180         ETM_COUNTER(1),
 181         ETM_COUNTER(2),
 182         ETM_COUNTER(3),
 183         ETM_COUNTER(4),
 184         { 0, 0, 0, 0, NULL }
 185 #undef ETM_COUNTER
 186 };
 187
 188 static const struct etm_reg_info etm_sequencer[] = {
 189 #define ETM_SEQ(i) \
 190                 { ETM_SEQUENCER_EVENT + (i), 17, WO, 0x10, \
 191                                 "ETM_sequencer_event" #i, }
 192         ETM_SEQ(0),                             /* 1->2 */
 193         ETM_SEQ(1),                             /* 2->1 */
 194         ETM_SEQ(2),                             /* 2->3 */
 195         ETM_SEQ(3),                             /* 3->1 */
 196         ETM_SEQ(4),                             /* 3->2 */
 197         ETM_SEQ(5),                             /* 1->3 */
 198 #undef ETM_SEQ
 199         /* 0x66 reserved */
 200         { ETM_SEQUENCER_STATE,  2, RO, 0x10, "ETM_sequencer_state", },
 201 };
 202
 203 static const struct etm_reg_info etm_outputs[] = {
 204 #define ETM_OUTPUT(i) \
 205                 { ETM_EXTERNAL_OUTPUT + (i) - 1, 17, WO, 0x10, \
 206                                 "ETM_external_output" #i, }
 207
 208         ETM_OUTPUT(1),
 209         ETM_OUTPUT(2),
 210         ETM_OUTPUT(3),
 211         ETM_OUTPUT(4),
 212         { 0, 0, 0, 0, NULL }
 213 #undef ETM_OUTPUT
 214 };
 215
 216 #if 0
 217         /* registers from 0x6c..0x7f were added after ETMv1.3 */
 218
 219         /* Context ID Comparators */
 220         { 0x6c, 32, RO, 0x20, "ETM_contextid_comparator_value1", }
 221         { 0x6d, 32, RO, 0x20, "ETM_contextid_comparator_value2", }
 222         { 0x6e, 32, RO, 0x20, "ETM_contextid_comparator_value3", }
 223         { 0x6f, 32, RO, 0x20, "ETM_contextid_comparator_mask", }
 224 #endif
 225
 226 static int etm_get_reg(struct reg *reg);
 227 static int etm_read_reg_w_check(struct reg *reg,
 228         uint8_t *check_value, uint8_t *check_mask);
 229 static int etm_register_user_commands(struct command_context *cmd_ctx);
 230 static int etm_set_reg_w_exec(struct reg *reg, uint8_t *buf);
 231 static int etm_write_reg(struct reg *reg, uint32_t value);
 232
 233 static const struct reg_arch_type etm_scan6_type = {
 234         .get = etm_get_reg,
 235         .set = etm_set_reg_w_exec,
 236 };
 237
 238 /* Look up register by ID ... most ETM instances only
 239  * support a subset of the possible registers.
 240  */
 241 static struct reg *etm_reg_lookup(struct etm_context *etm_ctx, unsigned id)
 242 {
 243         struct reg_cache *cache = etm_ctx->reg_cache;
 244         unsigned i;
 245
 246         for (i = 0; i < cache->num_regs; i++) {
 247                 struct etm_reg *reg = cache->reg_list[i].arch_info;
 248
 249                 if (reg->reg_info->addr == id)
 250                         return &cache->reg_list[i];
 251         }
 252
 253         /* caller asking for nonexistent register is a bug!
 254          * REVISIT say which of the N targets was involved */
 255         LOG_ERROR("ETM: register 0x%02x not available", id);
 256         return NULL;
 257 }
 258
 259 static void etm_reg_add(unsigned bcd_vers, struct arm_jtag *jtag_info,
 260         struct reg_cache *cache, struct etm_reg *ereg,
 261         const struct etm_reg_info *r, unsigned nreg)
 262 {
 263         struct reg *reg = cache->reg_list;
 264
 265         reg += cache->num_regs;
 266         ereg += cache->num_regs;
 267
 268         /* add up to "nreg" registers from "r", if supported by this
 269          * version of the ETM, to the specified cache.
 270          */
 271         for (; nreg--; r++) {
 272                 /* No more registers to add */
 273                 if (!r->size) {
 274                         LOG_ERROR("etm_reg_add is requested to add non-existing registers, ETM config might be bogus");
 275                         return;
 276                 }
 277
 278                 /* this ETM may be too old to have some registers */
 279                 if (r->bcd_vers > bcd_vers)
 280                         continue;
 281
 282                 reg->name = r->name;
 283                 reg->size = r->size;
 284                 reg->value = &ereg->value;
 285                 reg->arch_info = ereg;
 286                 reg->type = &etm_scan6_type;
 287                 reg++;
 288                 cache->num_regs++;
 289
 290                 ereg->reg_info = r;
 291                 ereg->jtag_info = jtag_info;
 292                 ereg++;
 293         }
 294 }
 295
 296 struct reg_cache *etm_build_reg_cache(struct target *target,
 297         struct arm_jtag *jtag_info, struct etm_context *etm_ctx)
 298 {
 299         struct reg_cache *reg_cache = malloc(sizeof(struct reg_cache));
 300         struct reg *reg_list = NULL;
 301         struct etm_reg *arch_info = NULL;
 302         unsigned bcd_vers, config;
 303
 304         /* the actual registers are kept in two arrays */
 305         reg_list = calloc(128, sizeof(struct reg));
 306         arch_info = calloc(128, sizeof(struct etm_reg));
 307
 308         /* fill in values for the reg cache */
 309         reg_cache->name = "etm registers";
 310         reg_cache->next = NULL;
 311         reg_cache->reg_list = reg_list;
 312         reg_cache->num_regs = 0;
 313
 314         /* add ETM_CONFIG, then parse its values to see
 315          * which other registers exist in this ETM
 316          */
 317         etm_reg_add(0x10, jtag_info, reg_cache, arch_info,
 318                 etm_core, 1);
 319
 320         etm_get_reg(reg_list);
 321         etm_ctx->config = buf_get_u32(&arch_info->value, 0, 32);
 322         config = etm_ctx->config;
 323
 324         /* figure ETM version then add base registers */
 325         if (config & (1 << 31)) {
 326                 LOG_WARNING("ETMv2+ support is incomplete");
 327
 328                 /* REVISIT more registers may exist; they may now be
 329                  * readable; more register bits have defined meanings;
 330                  * don't presume trace start/stop support is present;
 331                  * and include any context ID comparator registers.
 332                  */
 333                 etm_reg_add(0x20, jtag_info, reg_cache, arch_info,
 334                         etm_core + 1, 1);
 335                 etm_get_reg(reg_list + 1);
 336                 etm_ctx->id = buf_get_u32(
 337                                 &arch_info[1].value, 0, 32);
 338                 LOG_DEBUG("ETM ID: %08x", (unsigned) etm_ctx->id);
 339                 bcd_vers = 0x10 + (((etm_ctx->id) >> 4) & 0xff);
 340
 341         } else {
 342                 switch (config >> 28) {
 343                         case 7:
 344                         case 5:
 345                         case 3:
 346                                 bcd_vers = 0x13;
 347                                 break;
 348                         case 4:
 349                         case 2:
 350                                 bcd_vers = 0x12;
 351                                 break;
 352                         case 1:
 353                                 bcd_vers = 0x11;
 354                                 break;
 355                         case 0:
 356                                 bcd_vers = 0x10;
 357                                 break;
 358                         default:
 359                                 LOG_WARNING("Bad ETMv1 protocol %d", config >> 28);
 360                                 goto fail;
 361                 }
 362         }
 363         etm_ctx->bcd_vers = bcd_vers;
 364         LOG_INFO("ETM v%d.%d", bcd_vers >> 4, bcd_vers & 0xf);
 365
 366         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 367                 etm_basic, ARRAY_SIZE(etm_basic));
 368
 369         /* address and data comparators; counters; outputs */
 370         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 371                 etm_addr_comp, 4 * (0x0f & (config >> 0)));
 372         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 373                 etm_data_comp, 2 * (0x0f & (config >> 4)));
 374         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 375                 etm_counters, 4 * (0x07 & (config >> 13)));
 376         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 377                 etm_outputs, (0x07 & (config >> 20)));
 378
 379         /* FIFOFULL presence is optional
 380          * REVISIT for ETMv1.2 and later, don't bother adding this
 381          * unless ETM_SYS_CONFIG says it's also *supported* ...
 382          */
 383         if (config & (1 << 23))
 384                 etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 385                         etm_fifofull, ARRAY_SIZE(etm_fifofull));
 386
 387         /* sequencer is optional (for state-dependant triggering) */
 388         if (config & (1 << 16))
 389                 etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 390                         etm_sequencer, ARRAY_SIZE(etm_sequencer));
 391
 392         /* REVISIT could realloc and likely save half the memory
 393          * in the two chunks we allocated...
 394          */
 395
 396         /* the ETM might have an ETB connected */
 397         if (strcmp(etm_ctx->capture_driver->name, "etb") == 0) {
 398                 struct etb *etb = etm_ctx->capture_driver_priv;
 399
 400                 if (!etb) {
 401                         LOG_ERROR("etb selected as etm capture driver, but no ETB configured");
 402                         goto fail;
 403                 }
 404
 405                 reg_cache->next = etb_build_reg_cache(etb);
 406
 407                 etb->reg_cache = reg_cache->next;
 408         }
 409
 410         etm_ctx->reg_cache = reg_cache;
 411         return reg_cache;
 412
 413 fail:
 414         free(reg_cache);
 415         free(reg_list);
 416         free(arch_info);
 417         return NULL;
 418 }
 419
 420 static int etm_read_reg(struct reg *reg)
 421 {
 422         return etm_read_reg_w_check(reg, NULL, NULL);
 423 }
 424
 425 static int etm_store_reg(struct reg *reg)
 426 {
 427         return etm_write_reg(reg, buf_get_u32(reg->value, 0, reg->size));
 428 }
 429
 430 int etm_setup(struct target *target)
 431 {
 432         int retval;
 433         uint32_t etm_ctrl_value;
 434         struct arm *arm = target_to_arm(target);
 435         struct etm_context *etm_ctx = arm->etm;
 436         struct reg *etm_ctrl_reg;
 437
 438         etm_ctrl_reg = etm_reg_lookup(etm_ctx, ETM_CTRL);
 439         if (!etm_ctrl_reg)
 440                 return ERROR_OK;
 441
 442         /* initialize some ETM control register settings */
 443         etm_get_reg(etm_ctrl_reg);
 444         etm_ctrl_value = buf_get_u32(etm_ctrl_reg->value, 0, 32);
 445
 446         /* clear the ETM powerdown bit (0) */
 447         etm_ctrl_value &= ~ETM_CTRL_POWERDOWN;
 448
 449         /* configure port width (21,6:4), mode (13,17:16) and
 450          * for older modules clocking (13)
 451          */
 452         etm_ctrl_value = (etm_ctrl_value
 453                 & ~ETM_PORT_WIDTH_MASK
 454                 & ~ETM_PORT_MODE_MASK
 455                 & ~ETM_CTRL_DBGRQ
 456                 & ~ETM_PORT_CLOCK_MASK)
 457                 | etm_ctx->control;
 458
 459         buf_set_u32(etm_ctrl_reg->value, 0, 32, etm_ctrl_value);
 460         etm_store_reg(etm_ctrl_reg);
 461
 462         etm_ctx->control = etm_ctrl_value;
 463
 464         retval = jtag_execute_queue();
 465         if (retval != ERROR_OK)
 466                 return retval;
 467
 468         /* REVISIT for ETMv3.0 and later, read ETM_sys_config to
 469          * verify that those width and mode settings are OK ...
 470          */
 471
 472         retval = etm_ctx->capture_driver->init(etm_ctx);
 473         if (retval != ERROR_OK) {
 474                 LOG_ERROR("ETM capture driver initialization failed");
 475                 return retval;
 476         }
 477         return ERROR_OK;
 478 }
 479
 480 static int etm_get_reg(struct reg *reg)
 481 {
 482         int retval;
 483
 484         retval = etm_read_reg(reg);
 485         if (retval != ERROR_OK) {
 486                 LOG_ERROR("BUG: error scheduling etm register read");
 487                 return retval;
 488         }
 489
 490         retval = jtag_execute_queue();
 491         if (retval != ERROR_OK) {
 492                 LOG_ERROR("register read failed");
 493                 return retval;
 494         }
 495
 496         return ERROR_OK;
 497 }
 498
 499 static int etm_read_reg_w_check(struct reg *reg,
 500         uint8_t *check_value, uint8_t *check_mask)
 501 {
 502         struct etm_reg *etm_reg = reg->arch_info;
 503         const struct etm_reg_info *r = etm_reg->reg_info;
 504         uint8_t reg_addr = r->addr & 0x7f;
 505         struct scan_field fields[3];
 506         int retval;
 507
 508         if (etm_reg->reg_info->mode == WO) {
 509                 LOG_ERROR("BUG: can't read write-only register %s", r->name);
 510                 return ERROR_COMMAND_SYNTAX_ERROR;
 511         }
 512
 513         LOG_DEBUG("%s (%u)", r->name, reg_addr);
 514
 515         retval = arm_jtag_scann(etm_reg->jtag_info, 0x6, TAP_IDLE);
 516         if (retval != ERROR_OK)
 517                 return retval;
 518         retval = arm_jtag_set_instr(etm_reg->jtag_info,
 519                         etm_reg->jtag_info->intest_instr,
 520                         NULL,
 521                         TAP_IDLE);
 522         if (retval != ERROR_OK)
 523                 return retval;
 524
 525         fields[0].num_bits = 32;
 526         fields[0].out_value = reg->value;
 527         fields[0].in_value = NULL;
 528         fields[0].check_value = NULL;
 529         fields[0].check_mask = NULL;
 530
 531         fields[1].num_bits = 7;
 532         uint8_t temp1;
 533         fields[1].out_value = &temp1;
 534         buf_set_u32(&temp1, 0, 7, reg_addr);
 535         fields[1].in_value = NULL;
 536         fields[1].check_value = NULL;
 537         fields[1].check_mask = NULL;
 538
 539         fields[2].num_bits = 1;
 540         uint8_t temp2;
 541         fields[2].out_value = &temp2;
 542         buf_set_u32(&temp2, 0, 1, 0);
 543         fields[2].in_value = NULL;
 544         fields[2].check_value = NULL;
 545         fields[2].check_mask = NULL;
 546
 547         jtag_add_dr_scan(etm_reg->jtag_info->tap, 3, fields, TAP_IDLE);
 548
 549         fields[0].in_value = reg->value;
 550         fields[0].check_value = check_value;
 551         fields[0].check_mask = check_mask;
 552
 553         jtag_add_dr_scan_check(etm_reg->jtag_info->tap, 3, fields, TAP_IDLE);
 554
 555         return ERROR_OK;
 556 }
 557
 558 static int etm_set_reg(struct reg *reg, uint32_t value)
 559 {
 560         int retval = etm_write_reg(reg, value);
 561         if (retval != ERROR_OK) {
 562                 LOG_ERROR("BUG: error scheduling etm register write");
 563                 return retval;
 564         }
 565
 566         buf_set_u32(reg->value, 0, reg->size, value);
 567         reg->valid = 1;
 568         reg->dirty = 0;
 569
 570         return ERROR_OK;
 571 }
 572
 573 static int etm_set_reg_w_exec(struct reg *reg, uint8_t *buf)
 574 {
 575         int retval;
 576
 577         etm_set_reg(reg, buf_get_u32(buf, 0, reg->size));
 578
 579         retval = jtag_execute_queue();
 580         if (retval != ERROR_OK) {
 581                 LOG_ERROR("register write failed");
 582                 return retval;
 583         }
 584         return ERROR_OK;
 585 }
 586
 587 static int etm_write_reg(struct reg *reg, uint32_t value)
 588 {
 589         struct etm_reg *etm_reg = reg->arch_info;
 590         const struct etm_reg_info *r = etm_reg->reg_info;
 591         uint8_t reg_addr = r->addr & 0x7f;
 592         struct scan_field fields[3];
 593         int retval;
 594
 595         if (etm_reg->reg_info->mode == RO) {
 596                 LOG_ERROR("BUG: can't write read--only register %s", r->name);
 597                 return ERROR_COMMAND_SYNTAX_ERROR;
 598         }
 599
 600         LOG_DEBUG("%s (%u): 0x%8.8" PRIx32 "", r->name, reg_addr, value);
 601
 602         retval = arm_jtag_scann(etm_reg->jtag_info, 0x6, TAP_IDLE);
 603         if (retval != ERROR_OK)
 604                 return retval;
 605         retval = arm_jtag_set_instr(etm_reg->jtag_info,
 606                         etm_reg->jtag_info->intest_instr,
 607                         NULL,
 608                         TAP_IDLE);
 609         if (retval != ERROR_OK)
 610                 return retval;
 611
 612         fields[0].num_bits = 32;
 613         uint8_t tmp1[4];
 614         fields[0].out_value = tmp1;
 615         buf_set_u32(tmp1, 0, 32, value);
 616         fields[0].in_value = NULL;
 617
 618         fields[1].num_bits = 7;
 619         uint8_t tmp2;
 620         fields[1].out_value = &tmp2;
 621         buf_set_u32(&tmp2, 0, 7, reg_addr);
 622         fields[1].in_value = NULL;
 623
 624         fields[2].num_bits = 1;
 625         uint8_t tmp3;
 626         fields[2].out_value = &tmp3;
 627         buf_set_u32(&tmp3, 0, 1, 1);
 628         fields[2].in_value = NULL;
 629
 630         jtag_add_dr_scan(etm_reg->jtag_info->tap, 3, fields, TAP_IDLE);
 631
 632         return ERROR_OK;
 633 }
 634
 635
 636 /* ETM trace analysis functionality */
 637
 638 static struct etm_capture_driver *etm_capture_drivers[] = {
 639         &etb_capture_driver,
 640         &etm_dummy_capture_driver,
 641 #if BUILD_OOCD_TRACE == 1
 642         &oocd_trace_capture_driver,
 643 #endif
 644         NULL
 645 };
 646
 647 static int etm_read_instruction(struct etm_context *ctx, struct arm_instruction *instruction)
 648 {
 649         int i;
 650         int section = -1;
 651         size_t size_read;
 652         uint32_t opcode;
 653         int retval;
 654
 655         if (!ctx->image)
 656                 return ERROR_TRACE_IMAGE_UNAVAILABLE;
 657
 658         /* search for the section the current instruction belongs to */
 659         for (i = 0; i < ctx->image->num_sections; i++) {
 660                 if ((ctx->image->sections[i].base_address <= ctx->current_pc) &&
 661                         (ctx->image->sections[i].base_address + ctx->image->sections[i].size >
 662                         ctx->current_pc)) {
 663                         section = i;
 664                         break;
 665                 }
 666         }
 667
 668         if (section == -1) {
 669                 /* current instruction couldn't be found in the image */
 670                 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
 671         }
 672
 673         if (ctx->core_state == ARM_STATE_ARM) {
 674                 uint8_t buf[4];
 675                 retval = image_read_section(ctx->image, section,
 676                                 ctx->current_pc -
 677                                 ctx->image->sections[section].base_address,
 678                                 4, buf, &size_read);
 679                 if (retval != ERROR_OK) {
 680                         LOG_ERROR("error while reading instruction");
 681                         return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
 682                 }
 683                 opcode = target_buffer_get_u32(ctx->target, buf);
 684                 arm_evaluate_opcode(opcode, ctx->current_pc, instruction);
 685         } else if (ctx->core_state == ARM_STATE_THUMB) {
 686                 uint8_t buf[2];
 687                 retval = image_read_section(ctx->image, section,
 688                                 ctx->current_pc -
 689                                 ctx->image->sections[section].base_address,
 690                                 2, buf, &size_read);
 691                 if (retval != ERROR_OK) {
 692                         LOG_ERROR("error while reading instruction");
 693                         return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
 694                 }
 695                 opcode = target_buffer_get_u16(ctx->target, buf);
 696                 thumb_evaluate_opcode(opcode, ctx->current_pc, instruction);
 697         } else if (ctx->core_state == ARM_STATE_JAZELLE) {
 698                 LOG_ERROR("BUG: tracing of jazelle code not supported");
 699                 return ERROR_FAIL;
 700         } else {
 701                 LOG_ERROR("BUG: unknown core state encountered");
 702                 return ERROR_FAIL;
 703         }
 704
 705         return ERROR_OK;
 706 }
 707
 708 static int etmv1_next_packet(struct etm_context *ctx, uint8_t *packet, int apo)
 709 {
 710         while (ctx->data_index < ctx->trace_depth) {
 711                 /* if the caller specified an address packet offset, skip until the
 712                  * we reach the n-th cycle marked with tracesync */
 713                 if (apo > 0) {
 714                         if (ctx->trace_data[ctx->data_index].flags & ETMV1_TRACESYNC_CYCLE)
 715                                 apo--;
 716
 717                         if (apo > 0) {
 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                         ctx->data_index++;
 729                         ctx->data_half = 0;
 730                         continue;
 731                 }
 732
 733                 /* FIXME there are more port widths than these... */
 734                 if ((ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_16BIT) {
 735                         if (ctx->data_half == 0) {
 736                                 *packet = ctx->trace_data[ctx->data_index].packet & 0xff;
 737                                 ctx->data_half = 1;
 738                         } else {
 739                                 *packet = (ctx->trace_data[ctx->data_index].packet & 0xff00) >> 8;
 740                                 ctx->data_half = 0;
 741                                 ctx->data_index++;
 742                         }
 743                 } else if ((ctx->control & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT) {
 744                         *packet = ctx->trace_data[ctx->data_index].packet & 0xff;
 745                         ctx->data_index++;
 746                 } else {
 747                         /* on a 4-bit port, a packet will be output during two consecutive cycles */
 748                         if (ctx->data_index > (ctx->trace_depth - 2))
 749                                 return -1;
 750
 751                         *packet = ctx->trace_data[ctx->data_index].packet & 0xf;
 752                         *packet |= (ctx->trace_data[ctx->data_index + 1].packet & 0xf) << 4;
 753                         ctx->data_index += 2;
 754                 }
 755
 756                 return 0;
 757         }
 758
 759         return -1;
 760 }
 761
 762 static int etmv1_branch_address(struct etm_context *ctx)
 763 {
 764         int retval;
 765         uint8_t packet;
 766         int shift = 0;
 767         int apo;
 768         uint32_t i;
 769
 770         /* quit analysis if less than two cycles are left in the trace
 771          * because we can't extract the APO */
 772         if (ctx->data_index > (ctx->trace_depth - 2))
 773                 return -1;
 774
 775         /* a BE could be output during an APO cycle, skip the current
 776          * and continue with the new one */
 777         if (ctx->trace_data[ctx->pipe_index + 1].pipestat & 0x4)
 778                 return 1;
 779         if (ctx->trace_data[ctx->pipe_index + 2].pipestat & 0x4)
 780                 return 2;
 781
 782         /* address packet offset encoded in the next two cycles' pipestat bits */
 783         apo = ctx->trace_data[ctx->pipe_index + 1].pipestat & 0x3;
 784         apo |= (ctx->trace_data[ctx->pipe_index + 2].pipestat & 0x3) << 2;
 785
 786         /* count number of tracesync cycles between current pipe_index and data_index
 787          * i.e. the number of tracesyncs that data_index already passed by
 788          * to subtract them from the APO */
 789         for (i = ctx->pipe_index; i < ctx->data_index; i++) {
 790                 if (ctx->trace_data[ctx->pipe_index + 1].pipestat & ETMV1_TRACESYNC_CYCLE)
 791                         apo--;
 792         }
 793
 794         /* extract up to four 7-bit packets */
 795         do {
 796                 retval = etmv1_next_packet(ctx, &packet, (shift == 0) ? apo + 1 : 0);
 797                 if (retval != 0)
 798                         return -1;
 799                 ctx->last_branch &= ~(0x7f << shift);
 800                 ctx->last_branch |= (packet & 0x7f) << shift;
 801                 shift += 7;
 802         } while ((packet & 0x80) && (shift < 28));
 803
 804         /* one last packet holding 4 bits of the address, plus the branch reason code */
 805         if ((shift == 28) && (packet & 0x80)) {
 806                 retval = etmv1_next_packet(ctx, &packet, 0);
 807                 if (retval != 0)
 808                         return -1;
 809                 ctx->last_branch &= 0x0fffffff;
 810                 ctx->last_branch |= (packet & 0x0f) << 28;
 811                 ctx->last_branch_reason = (packet & 0x70) >> 4;
 812                 shift += 4;
 813         } else
 814                 ctx->last_branch_reason = 0;
 815
 816         if (shift == 32)
 817                 ctx->pc_ok = 1;
 818
 819         /* if a full address was output, we might have branched into Jazelle state */
 820         if ((shift == 32) && (packet & 0x80))
 821                 ctx->core_state = ARM_STATE_JAZELLE;
 822         else {
 823                 /* if we didn't branch into Jazelle state, the current processor state is
 824                  * encoded in bit 0 of the branch target address */
 825                 if (ctx->last_branch & 0x1) {
 826                         ctx->core_state = ARM_STATE_THUMB;
 827                         ctx->last_branch &= ~0x1;
 828                 } else {
 829                         ctx->core_state = ARM_STATE_ARM;
 830                         ctx->last_branch &= ~0x3;
 831                 }
 832         }
 833
 834         return 0;
 835 }
 836
 837 static int etmv1_data(struct etm_context *ctx, int size, uint32_t *data)
 838 {
 839         int j;
 840         uint8_t buf[4];
 841         int retval;
 842
 843         for (j = 0; j < size; j++) {
 844                 retval = etmv1_next_packet(ctx, &buf[j], 0);
 845                 if (retval != 0)
 846                         return -1;
 847         }
 848
 849         if (size == 8) {
 850                 LOG_ERROR("TODO: add support for 64-bit values");
 851                 return -1;
 852         } else if (size == 4)
 853                 *data = target_buffer_get_u32(ctx->target, buf);
 854         else if (size == 2)
 855                 *data = target_buffer_get_u16(ctx->target, buf);
 856         else if (size == 1)
 857                 *data = buf[0];
 858         else
 859                 return -1;
 860
 861         return 0;
 862 }
 863
 864 static int etmv1_analyze_trace(struct etm_context *ctx, struct command_context *cmd_ctx)
 865 {
 866         int retval;
 867         struct arm_instruction instruction;
 868
 869         /* read the trace data if it wasn't read already */
 870         if (ctx->trace_depth == 0)
 871                 ctx->capture_driver->read_trace(ctx);
 872
 873         if (ctx->trace_depth == 0) {
 874                 command_print(cmd_ctx, "Trace is empty.");
 875                 return ERROR_OK;
 876         }
 877
 878         /* start at the beginning of the captured trace */
 879         ctx->pipe_index = 0;
 880         ctx->data_index = 0;
 881         ctx->data_half = 0;
 882
 883         /* neither the PC nor the data pointer are valid */
 884         ctx->pc_ok = 0;
 885         ctx->ptr_ok = 0;
 886
 887         while (ctx->pipe_index < ctx->trace_depth) {
 888                 uint8_t pipestat = ctx->trace_data[ctx->pipe_index].pipestat;
 889                 uint32_t next_pc = ctx->current_pc;
 890                 uint32_t old_data_index = ctx->data_index;
 891                 uint32_t old_data_half = ctx->data_half;
 892                 uint32_t old_index = ctx->pipe_index;
 893                 uint32_t last_instruction = ctx->last_instruction;
 894                 uint32_t cycles = 0;
 895                 int current_pc_ok = ctx->pc_ok;
 896
 897                 if (ctx->trace_data[ctx->pipe_index].flags & ETMV1_TRIGGER_CYCLE)
 898                         command_print(cmd_ctx, "--- trigger ---");
 899
 900                 /* instructions execute in IE/D or BE/D cycles */
 901                 if ((pipestat == STAT_IE) || (pipestat == STAT_ID))
 902                         ctx->last_instruction = ctx->pipe_index;
 903
 904                 /* if we don't have a valid pc skip until we reach an indirect branch */
 905                 if ((!ctx->pc_ok) && (pipestat != STAT_BE)) {
 906                         ctx->pipe_index++;
 907                         continue;
 908                 }
 909
 910                 /* any indirect branch could have interrupted instruction flow
 911                  * - the branch reason code could indicate a trace discontinuity
 912                  * - a branch to the exception vectors indicates an exception
 913                  */
 914                 if ((pipestat == STAT_BE) || (pipestat == STAT_BD)) {
 915                         /* backup current data index, to be able to consume the branch address
 916                          * before examining data address and values
 917                          */
 918                         old_data_index = ctx->data_index;
 919                         old_data_half = ctx->data_half;
 920
 921                         ctx->last_instruction = ctx->pipe_index;
 922
 923                         retval = etmv1_branch_address(ctx);
 924                         if (retval != 0) {
 925                                 /* negative return value from etmv1_branch_address means we ran out of packets,
 926                                  * quit analysing the trace */
 927                                 if (retval < 0)
 928                                         break;
 929
 930                                 /* a positive return values means the current branch was abandoned,
 931                                  * and a new branch was encountered in cycle ctx->pipe_index + retval;
 932                                  */
 933                                 LOG_WARNING(
 934                                         "abandoned branch encountered, correctness of analysis uncertain");
 935                                 ctx->pipe_index += retval;
 936                                 continue;
 937                         }
 938
 939                         /* skip over APO cycles */
 940                         ctx->pipe_index += 2;
 941
 942                         switch (ctx->last_branch_reason) {
 943                                 case 0x0:       /* normal PC change */
 944                                         next_pc = ctx->last_branch;
 945                                         break;
 946                                 case 0x1:       /* tracing enabled */
 947                                         command_print(cmd_ctx,
 948                                                 "--- tracing enabled at 0x%8.8" PRIx32 " ---",
 949                                                 ctx->last_branch);
 950                                         ctx->current_pc = ctx->last_branch;
 951                                         ctx->pipe_index++;
 952                                         continue;
 953                                         break;
 954                                 case 0x2:       /* trace restarted after FIFO overflow */
 955                                         command_print(cmd_ctx,
 956                                                 "--- trace restarted after FIFO overflow at 0x%8.8" PRIx32 " ---",
 957                                                 ctx->last_branch);
 958                                         ctx->current_pc = ctx->last_branch;
 959                                         ctx->pipe_index++;
 960                                         continue;
 961                                         break;
 962                                 case 0x3:       /* exit from debug state */
 963                                         command_print(cmd_ctx,
 964                                                 "--- exit from debug state at 0x%8.8" PRIx32 " ---",
 965                                                 ctx->last_branch);
 966                                         ctx->current_pc = ctx->last_branch;
 967                                         ctx->pipe_index++;
 968                                         continue;
 969                                         break;
 970                                 case 0x4:       /* periodic synchronization point */
 971                                         next_pc = ctx->last_branch;
 972                                         /* if we had no valid PC prior to this synchronization point,
 973                                          * we have to move on with the next trace cycle
 974                                          */
 975                                         if (!current_pc_ok) {
 976                                                 command_print(cmd_ctx,
 977                                                         "--- periodic synchronization point at 0x%8.8" PRIx32 " ---",
 978                                                         next_pc);
 979                                                 ctx->current_pc = next_pc;
 980                                                 ctx->pipe_index++;
 981                                                 continue;
 982                                         }
 983                                         break;
 984                                 default:        /* reserved */
 985                                         LOG_ERROR(
 986                                                 "BUG: branch reason code 0x%" PRIx32 " is reserved",
 987                                                 ctx->last_branch_reason);
 988                                         return ERROR_FAIL;
 989                         }
 990
 991                         /* if we got here the branch was a normal PC change
 992                          * (or a periodic synchronization point, which means the same for that matter)
 993                          * if we didn't acquire a complete PC continue with the next cycle
 994                          */
 995                         if (!ctx->pc_ok)
 996                                 continue;
 997
 998                         /* indirect branch to the exception vector means an exception occurred */
 999                         if ((ctx->last_branch <= 0x20)
1000                                 || ((ctx->last_branch >= 0xffff0000) &&
1001                                 (ctx->last_branch <= 0xffff0020))) {
1002                                 if ((ctx->last_branch & 0xff) == 0x10)
1003                                         command_print(cmd_ctx, "data abort");
1004                                 else {
1005                                         command_print(cmd_ctx,
1006                                                 "exception vector 0x%2.2" PRIx32 "",
1007                                                 ctx->last_branch);
1008                                         ctx->current_pc = ctx->last_branch;
1009                                         ctx->pipe_index++;
1010                                         continue;
1011                                 }
1012                         }
1013                 }
1014
1015                 /* an instruction was executed (or not, depending on the condition flags)
1016                  * retrieve it from the image for displaying */
1017                 if (ctx->pc_ok && (pipestat != STAT_WT) && (pipestat != STAT_TD) &&
1018                         !(((pipestat == STAT_BE) || (pipestat == STAT_BD)) &&
1019                         ((ctx->last_branch_reason != 0x0) && (ctx->last_branch_reason != 0x4)))) {
1020                         retval = etm_read_instruction(ctx, &instruction);
1021                         if (retval != ERROR_OK) {
1022                                 /* can't continue tracing with no image available */
1023                                 if (retval == ERROR_TRACE_IMAGE_UNAVAILABLE)
1024                                         return retval;
1025                                 else if (retval == ERROR_TRACE_INSTRUCTION_UNAVAILABLE) {
1026                                         /* TODO: handle incomplete images
1027                                          * for now we just quit the analysis*/
1028                                         return retval;
1029                                 }
1030                         }
1031
1032                         cycles = old_index - last_instruction;
1033                 }
1034
1035                 if ((pipestat == STAT_ID) || (pipestat == STAT_BD)) {
1036                         uint32_t new_data_index = ctx->data_index;
1037                         uint32_t new_data_half = ctx->data_half;
1038
1039                         /* in case of a branch with data, the branch target address was consumed before
1040                          * we temporarily go back to the saved data index */
1041                         if (pipestat == STAT_BD) {
1042                                 ctx->data_index = old_data_index;
1043                                 ctx->data_half = old_data_half;
1044                         }
1045
1046                         if (ctx->control & ETM_CTRL_TRACE_ADDR) {
1047                                 uint8_t packet;
1048                                 int shift = 0;
1049
1050                                 do {
1051                                         retval = etmv1_next_packet(ctx, &packet, 0);
1052                                         if (retval != 0)
1053                                                 return ERROR_ETM_ANALYSIS_FAILED;
1054                                         ctx->last_ptr &= ~(0x7f << shift);
1055                                         ctx->last_ptr |= (packet & 0x7f) << shift;
1056                                         shift += 7;
1057                                 } while ((packet & 0x80) && (shift < 32));
1058
1059                                 if (shift >= 32)
1060                                         ctx->ptr_ok = 1;
1061
1062                                 if (ctx->ptr_ok)
1063                                         command_print(cmd_ctx,
1064                                                 "address: 0x%8.8" PRIx32 "",
1065                                                 ctx->last_ptr);
1066                         }
1067
1068                         if (ctx->control & ETM_CTRL_TRACE_DATA) {
1069                                 if ((instruction.type == ARM_LDM) ||
1070                                         (instruction.type == ARM_STM)) {
1071                                         int i;
1072                                         for (i = 0; i < 16; i++) {
1073                                                 if (instruction.info.load_store_multiple.
1074                                                         register_list & (1 << i)) {
1075                                                         uint32_t data;
1076                                                         if (etmv1_data(ctx, 4, &data) != 0)
1077                                                                 return ERROR_ETM_ANALYSIS_FAILED;
1078                                                         command_print(cmd_ctx,
1079                                                                 "data: 0x%8.8" PRIx32 "",
1080                                                                 data);
1081                                                 }
1082                                         }
1083                                 } else if ((instruction.type >= ARM_LDR) &&
1084                                         (instruction.type <= ARM_STRH)) {
1085                                         uint32_t data;
1086                                         if (etmv1_data(ctx, arm_access_size(&instruction),
1087                                                 &data) != 0)
1088                                                 return ERROR_ETM_ANALYSIS_FAILED;
1089                                         command_print(cmd_ctx, "data: 0x%8.8" PRIx32 "", data);
1090                                 }
1091                         }
1092
1093                         /* restore data index after consuming BD address and data */
1094                         if (pipestat == STAT_BD) {
1095                                 ctx->data_index = new_data_index;
1096                                 ctx->data_half = new_data_half;
1097                         }
1098                 }
1099
1100                 /* adjust PC */
1101                 if ((pipestat == STAT_IE) || (pipestat == STAT_ID)) {
1102                         if (((instruction.type == ARM_B) ||
1103                                 (instruction.type == ARM_BL) ||
1104                                 (instruction.type == ARM_BLX)) &&
1105                                 (instruction.info.b_bl_bx_blx.target_address != 0xffffffff))
1106                                 next_pc = instruction.info.b_bl_bx_blx.target_address;
1107                         else
1108                                 next_pc += (ctx->core_state == ARM_STATE_ARM) ? 4 : 2;
1109                 } else if (pipestat == STAT_IN)
1110                         next_pc += (ctx->core_state == ARM_STATE_ARM) ? 4 : 2;
1111
1112                 if ((pipestat != STAT_TD) && (pipestat != STAT_WT)) {
1113                         char cycles_text[32] = "";
1114
1115                         /* if the trace was captured with cycle accurate tracing enabled,
1116                          * output the number of cycles since the last executed instruction
1117                          */
1118                         if (ctx->control & ETM_CTRL_CYCLE_ACCURATE) {
1119                                 snprintf(cycles_text, 32, " (%i %s)",
1120                                         (int)cycles,
1121                                         (cycles == 1) ? "cycle" : "cycles");
1122                         }
1123
1124                         command_print(cmd_ctx, "%s%s%s",
1125                                 instruction.text,
1126                                 (pipestat == STAT_IN) ? " (not executed)" : "",
1127                                 cycles_text);
1128
1129                         ctx->current_pc = next_pc;
1130
1131                         /* packets for an instruction don't start on or before the preceding
1132                          * functional pipestat (i.e. other than WT or TD)
1133                          */
1134                         if (ctx->data_index <= ctx->pipe_index) {
1135                                 ctx->data_index = ctx->pipe_index + 1;
1136                                 ctx->data_half = 0;
1137                         }
1138                 }
1139
1140                 ctx->pipe_index += 1;
1141         }
1142
1143         return ERROR_OK;
1144 }
1145
1146 static COMMAND_HELPER(handle_etm_tracemode_command_update,
1147         uint32_t *mode)
1148 {
1149         uint32_t tracemode;
1150
1151         /* what parts of data access are traced? */
1152         if (strcmp(CMD_ARGV[0], "none") == 0)
1153                 tracemode = 0;
1154         else if (strcmp(CMD_ARGV[0], "data") == 0)
1155                 tracemode = ETM_CTRL_TRACE_DATA;
1156         else if (strcmp(CMD_ARGV[0], "address") == 0)
1157                 tracemode = ETM_CTRL_TRACE_ADDR;
1158         else if (strcmp(CMD_ARGV[0], "all") == 0)
1159                 tracemode = ETM_CTRL_TRACE_DATA | ETM_CTRL_TRACE_ADDR;
1160         else {
1161                 command_print(CMD_CTX, "invalid option '%s'", CMD_ARGV[0]);
1162                 return ERROR_COMMAND_SYNTAX_ERROR;
1163         }
1164
1165         uint8_t context_id;
1166         COMMAND_PARSE_NUMBER(u8, CMD_ARGV[1], context_id);
1167         switch (context_id) {
1168                 case 0:
1169                         tracemode |= ETM_CTRL_CONTEXTID_NONE;
1170                         break;
1171                 case 8:
1172                         tracemode |= ETM_CTRL_CONTEXTID_8;
1173                         break;
1174                 case 16:
1175                         tracemode |= ETM_CTRL_CONTEXTID_16;
1176                         break;
1177                 case 32:
1178                         tracemode |= ETM_CTRL_CONTEXTID_32;
1179                         break;
1180                 default:
1181                         command_print(CMD_CTX, "invalid option '%s'", CMD_ARGV[1]);
1182                         return ERROR_COMMAND_SYNTAX_ERROR;
1183         }
1184
1185         bool etmv1_cycle_accurate;
1186         COMMAND_PARSE_ENABLE(CMD_ARGV[2], etmv1_cycle_accurate);
1187         if (etmv1_cycle_accurate)
1188                 tracemode |= ETM_CTRL_CYCLE_ACCURATE;
1189
1190         bool etmv1_branch_output;
1191         COMMAND_PARSE_ENABLE(CMD_ARGV[3], etmv1_branch_output);
1192         if (etmv1_branch_output)
1193                 tracemode |= ETM_CTRL_BRANCH_OUTPUT;
1194
1195         /* IGNORED:
1196          *  - CPRT tracing (coprocessor register transfers)
1197          *  - debug request (causes debug entry on trigger)
1198          *  - stall on FIFOFULL (preventing tracedata loss)
1199          */
1200         *mode = tracemode;
1201
1202         return ERROR_OK;
1203 }
1204
1205 COMMAND_HANDLER(handle_etm_tracemode_command)
1206 {
1207         struct target *target = get_current_target(CMD_CTX);
1208         struct arm *arm = target_to_arm(target);
1209         struct etm_context *etm;
1210
1211         if (!is_arm(arm)) {
1212                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1213                 return ERROR_FAIL;
1214         }
1215
1216         etm = arm->etm;
1217         if (!etm) {
1218                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1219                 return ERROR_FAIL;
1220         }
1221
1222         uint32_t tracemode = etm->control;
1223
1224         switch (CMD_ARGC) {
1225                 case 0:
1226                         break;
1227                 case 4:
1228                         CALL_COMMAND_HANDLER(handle_etm_tracemode_command_update,
1229                                 &tracemode);
1230                         break;
1231                 default:
1232                         return ERROR_COMMAND_SYNTAX_ERROR;
1233         }
1234
1235         /**
1236          * todo: fail if parameters were invalid for this hardware,
1237          * or couldn't be written; display actual hardware state...
1238          */
1239
1240         command_print(CMD_CTX, "current tracemode configuration:");
1241
1242         switch (tracemode & ETM_CTRL_TRACE_MASK) {
1243                 default:
1244                         command_print(CMD_CTX, "data tracing: none");
1245                         break;
1246                 case ETM_CTRL_TRACE_DATA:
1247                         command_print(CMD_CTX, "data tracing: data only");
1248                         break;
1249                 case ETM_CTRL_TRACE_ADDR:
1250                         command_print(CMD_CTX, "data tracing: address only");
1251                         break;
1252                 case ETM_CTRL_TRACE_DATA | ETM_CTRL_TRACE_ADDR:
1253                         command_print(CMD_CTX, "data tracing: address and data");
1254                         break;
1255         }
1256
1257         switch (tracemode & ETM_CTRL_CONTEXTID_MASK) {
1258                 case ETM_CTRL_CONTEXTID_NONE:
1259                         command_print(CMD_CTX, "contextid tracing: none");
1260                         break;
1261                 case ETM_CTRL_CONTEXTID_8:
1262                         command_print(CMD_CTX, "contextid tracing: 8 bit");
1263                         break;
1264                 case ETM_CTRL_CONTEXTID_16:
1265                         command_print(CMD_CTX, "contextid tracing: 16 bit");
1266                         break;
1267                 case ETM_CTRL_CONTEXTID_32:
1268                         command_print(CMD_CTX, "contextid tracing: 32 bit");
1269                         break;
1270         }
1271
1272         if (tracemode & ETM_CTRL_CYCLE_ACCURATE)
1273                 command_print(CMD_CTX, "cycle-accurate tracing enabled");
1274         else
1275                 command_print(CMD_CTX, "cycle-accurate tracing disabled");
1276
1277         if (tracemode & ETM_CTRL_BRANCH_OUTPUT)
1278                 command_print(CMD_CTX, "full branch address output enabled");
1279         else
1280                 command_print(CMD_CTX, "full branch address output disabled");
1281
1282 #define TRACEMODE_MASK ( \
1283                 ETM_CTRL_CONTEXTID_MASK \
1284                 | ETM_CTRL_BRANCH_OUTPUT \
1285                 | ETM_CTRL_CYCLE_ACCURATE \
1286                 | ETM_CTRL_TRACE_MASK \
1287                 )
1288
1289         /* only update ETM_CTRL register if tracemode changed */
1290         if ((etm->control & TRACEMODE_MASK) != tracemode) {
1291                 struct reg *etm_ctrl_reg;
1292
1293                 etm_ctrl_reg = etm_reg_lookup(etm, ETM_CTRL);
1294                 if (!etm_ctrl_reg)
1295                         return ERROR_FAIL;
1296
1297                 etm->control &= ~TRACEMODE_MASK;
1298                 etm->control |= tracemode & TRACEMODE_MASK;
1299
1300                 buf_set_u32(etm_ctrl_reg->value, 0, 32, etm->control);
1301                 etm_store_reg(etm_ctrl_reg);
1302
1303                 /* invalidate old trace data */
1304                 etm->capture_status = TRACE_IDLE;
1305                 if (etm->trace_depth > 0) {
1306                         free(etm->trace_data);
1307                         etm->trace_data = NULL;
1308                 }
1309                 etm->trace_depth = 0;
1310         }
1311
1312 #undef TRACEMODE_MASK
1313
1314         return ERROR_OK;
1315 }
1316
1317 COMMAND_HANDLER(handle_etm_config_command)
1318 {
1319         struct target *target;
1320         struct arm *arm;
1321         uint32_t portmode = 0x0;
1322         struct etm_context *etm_ctx;
1323         int i;
1324
1325         if (CMD_ARGC != 5)
1326                 return ERROR_COMMAND_SYNTAX_ERROR;
1327
1328         target = get_target(CMD_ARGV[0]);
1329         if (!target) {
1330                 LOG_ERROR("target '%s' not defined", CMD_ARGV[0]);
1331                 return ERROR_FAIL;
1332         }
1333
1334         arm = target_to_arm(target);
1335         if (!is_arm(arm)) {
1336                 command_print(CMD_CTX, "target '%s' is '%s'; not an ARM",
1337                         target_name(target),
1338                         target_type_name(target));
1339                 return ERROR_FAIL;
1340         }
1341
1342         /* FIXME for ETMv3.0 and above -- and we don't yet know what ETM
1343          * version we'll be using!! -- so we can't know how to validate
1344          * params yet.  "etm config" should likely be *AFTER* hookup...
1345          *
1346          *  - Many more widths might be supported ... and we can easily
1347          *    check whether our setting "took".
1348          *
1349          *  - The "clock" and "mode" bits are interpreted differently.
1350          *    See ARM IHI 0014O table 2-17 for the old behaviour, and
1351          *    table 2-18 for the new.  With ETB it's best to specify
1352          *    "normal full" ...
1353          */
1354         uint8_t port_width;
1355         COMMAND_PARSE_NUMBER(u8, CMD_ARGV[1], port_width);
1356         switch (port_width) {
1357                 /* before ETMv3.0 */
1358                 case 4:
1359                         portmode |= ETM_PORT_4BIT;
1360                         break;
1361                 case 8:
1362                         portmode |= ETM_PORT_8BIT;
1363                         break;
1364                 case 16:
1365                         portmode |= ETM_PORT_16BIT;
1366                         break;
1367                 /* ETMv3.0 and later*/
1368                 case 24:
1369                         portmode |= ETM_PORT_24BIT;
1370                         break;
1371                 case 32:
1372                         portmode |= ETM_PORT_32BIT;
1373                         break;
1374                 case 48:
1375                         portmode |= ETM_PORT_48BIT;
1376                         break;
1377                 case 64:
1378                         portmode |= ETM_PORT_64BIT;
1379                         break;
1380                 case 1:
1381                         portmode |= ETM_PORT_1BIT;
1382                         break;
1383                 case 2:
1384                         portmode |= ETM_PORT_2BIT;
1385                         break;
1386                 default:
1387                         command_print(CMD_CTX,
1388                                 "unsupported ETM port width '%s'", CMD_ARGV[1]);
1389                         return ERROR_FAIL;
1390         }
1391
1392         if (strcmp("normal", CMD_ARGV[2]) == 0)
1393                 portmode |= ETM_PORT_NORMAL;
1394         else if (strcmp("multiplexed", CMD_ARGV[2]) == 0)
1395                 portmode |= ETM_PORT_MUXED;
1396         else if (strcmp("demultiplexed", CMD_ARGV[2]) == 0)
1397                 portmode |= ETM_PORT_DEMUXED;
1398         else {
1399                 command_print(CMD_CTX,
1400                         "unsupported ETM port mode '%s', must be 'normal', 'multiplexed' or 'demultiplexed'",
1401                         CMD_ARGV[2]);
1402                 return ERROR_FAIL;
1403         }
1404
1405         if (strcmp("half", CMD_ARGV[3]) == 0)
1406                 portmode |= ETM_PORT_HALF_CLOCK;
1407         else if (strcmp("full", CMD_ARGV[3]) == 0)
1408                 portmode |= ETM_PORT_FULL_CLOCK;
1409         else {
1410                 command_print(CMD_CTX,
1411                         "unsupported ETM port clocking '%s', must be 'full' or 'half'",
1412                         CMD_ARGV[3]);
1413                 return ERROR_FAIL;
1414         }
1415
1416         etm_ctx = calloc(1, sizeof(struct etm_context));
1417         if (!etm_ctx) {
1418                 LOG_DEBUG("out of memory");
1419                 return ERROR_FAIL;
1420         }
1421
1422         for (i = 0; etm_capture_drivers[i]; i++) {
1423                 if (strcmp(CMD_ARGV[4], etm_capture_drivers[i]->name) == 0) {
1424                         int retval = register_commands(CMD_CTX, NULL,
1425                                         etm_capture_drivers[i]->commands);
1426                         if (ERROR_OK != retval) {
1427                                 free(etm_ctx);
1428                                 return retval;
1429                         }
1430
1431                         etm_ctx->capture_driver = etm_capture_drivers[i];
1432
1433                         break;
1434                 }
1435         }
1436
1437         if (!etm_capture_drivers[i]) {
1438                 /* no supported capture driver found, don't register an ETM */
1439                 free(etm_ctx);
1440                 LOG_ERROR("trace capture driver '%s' not found", CMD_ARGV[4]);
1441                 return ERROR_FAIL;
1442         }
1443
1444         etm_ctx->target = target;
1445         etm_ctx->trace_data = NULL;
1446         etm_ctx->control = portmode;
1447         etm_ctx->core_state = ARM_STATE_ARM;
1448
1449         arm->etm = etm_ctx;
1450
1451         return etm_register_user_commands(CMD_CTX);
1452 }
1453
1454 COMMAND_HANDLER(handle_etm_info_command)
1455 {
1456         struct target *target;
1457         struct arm *arm;
1458         struct etm_context *etm;
1459         struct reg *etm_sys_config_reg;
1460         int max_port_size;
1461         uint32_t config;
1462
1463         target = get_current_target(CMD_CTX);
1464         arm = target_to_arm(target);
1465         if (!is_arm(arm)) {
1466                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1467                 return ERROR_FAIL;
1468         }
1469
1470         etm = arm->etm;
1471         if (!etm) {
1472                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1473                 return ERROR_FAIL;
1474         }
1475
1476         command_print(CMD_CTX, "ETM v%d.%d",
1477                 etm->bcd_vers >> 4, etm->bcd_vers & 0xf);
1478         command_print(CMD_CTX, "pairs of address comparators: %i",
1479                 (int) (etm->config >> 0) & 0x0f);
1480         command_print(CMD_CTX, "data comparators: %i",
1481                 (int) (etm->config >> 4) & 0x0f);
1482         command_print(CMD_CTX, "memory map decoders: %i",
1483                 (int) (etm->config >> 8) & 0x1f);
1484         command_print(CMD_CTX, "number of counters: %i",
1485                 (int) (etm->config >> 13) & 0x07);
1486         command_print(CMD_CTX, "sequencer %spresent",
1487                 (int) (etm->config & (1 << 16)) ? "" : "not ");
1488         command_print(CMD_CTX, "number of ext. inputs: %i",
1489                 (int) (etm->config >> 17) & 0x07);
1490         command_print(CMD_CTX, "number of ext. outputs: %i",
1491                 (int) (etm->config >> 20) & 0x07);
1492         command_print(CMD_CTX, "FIFO full %spresent",
1493                 (int) (etm->config & (1 << 23)) ? "" : "not ");
1494         if (etm->bcd_vers < 0x20)
1495                 command_print(CMD_CTX, "protocol version: %i",
1496                         (int) (etm->config >> 28) & 0x07);
1497         else {
1498                 command_print(CMD_CTX,
1499                         "coprocessor and memory access %ssupported",
1500                         (etm->config & (1 << 26)) ? "" : "not ");
1501                 command_print(CMD_CTX, "trace start/stop %spresent",
1502                         (etm->config & (1 << 26)) ? "" : "not ");
1503                 command_print(CMD_CTX, "number of context comparators: %i",
1504                         (int) (etm->config >> 24) & 0x03);
1505         }
1506
1507         /* SYS_CONFIG isn't present before ETMv1.2 */
1508         etm_sys_config_reg = etm_reg_lookup(etm, ETM_SYS_CONFIG);
1509         if (!etm_sys_config_reg)
1510                 return ERROR_OK;
1511
1512         etm_get_reg(etm_sys_config_reg);
1513         config = buf_get_u32(etm_sys_config_reg->value, 0, 32);
1514
1515         LOG_DEBUG("ETM SYS CONFIG %08x", (unsigned) config);
1516
1517         max_port_size = config & 0x7;
1518         if (etm->bcd_vers >= 0x30)
1519                 max_port_size |= (config >> 6) & 0x08;
1520         switch (max_port_size) {
1521                 /* before ETMv3.0 */
1522                 case 0:
1523                         max_port_size = 4;
1524                         break;
1525                 case 1:
1526                         max_port_size = 8;
1527                         break;
1528                 case 2:
1529                         max_port_size = 16;
1530                         break;
1531                 /* ETMv3.0 and later*/
1532                 case 3:
1533                         max_port_size = 24;
1534                         break;
1535                 case 4:
1536                         max_port_size = 32;
1537                         break;
1538                 case 5:
1539                         max_port_size = 48;
1540                         break;
1541                 case 6:
1542                         max_port_size = 64;
1543                         break;
1544                 case 8:
1545                         max_port_size = 1;
1546                         break;
1547                 case 9:
1548                         max_port_size = 2;
1549                         break;
1550                 default:
1551                         LOG_ERROR("Illegal max_port_size");
1552                         return ERROR_FAIL;
1553         }
1554         command_print(CMD_CTX, "max. port size: %i", max_port_size);
1555
1556         if (etm->bcd_vers < 0x30) {
1557                 command_print(CMD_CTX, "half-rate clocking %ssupported",
1558                         (config & (1 << 3)) ? "" : "not ");
1559                 command_print(CMD_CTX, "full-rate clocking %ssupported",
1560                         (config & (1 << 4)) ? "" : "not ");
1561                 command_print(CMD_CTX, "normal trace format %ssupported",
1562                         (config & (1 << 5)) ? "" : "not ");
1563                 command_print(CMD_CTX, "multiplex trace format %ssupported",
1564                         (config & (1 << 6)) ? "" : "not ");
1565                 command_print(CMD_CTX, "demultiplex trace format %ssupported",
1566                         (config & (1 << 7)) ? "" : "not ");
1567         } else {
1568                 /* REVISIT show which size and format are selected ... */
1569                 command_print(CMD_CTX, "current port size %ssupported",
1570                         (config & (1 << 10)) ? "" : "not ");
1571                 command_print(CMD_CTX, "current trace format %ssupported",
1572                         (config & (1 << 11)) ? "" : "not ");
1573         }
1574         if (etm->bcd_vers >= 0x21)
1575                 command_print(CMD_CTX, "fetch comparisons %ssupported",
1576                         (config & (1 << 17)) ? "not " : "");
1577         command_print(CMD_CTX, "FIFO full %ssupported",
1578                 (config & (1 << 8)) ? "" : "not ");
1579
1580         return ERROR_OK;
1581 }
1582
1583 COMMAND_HANDLER(handle_etm_status_command)
1584 {
1585         struct target *target;
1586         struct arm *arm;
1587         struct etm_context *etm;
1588         trace_status_t trace_status;
1589
1590         target = get_current_target(CMD_CTX);
1591         arm = target_to_arm(target);
1592         if (!is_arm(arm)) {
1593                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1594                 return ERROR_FAIL;
1595         }
1596
1597         etm = arm->etm;
1598         if (!etm) {
1599                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1600                 return ERROR_FAIL;
1601         }
1602
1603         /* ETM status */
1604         if (etm->bcd_vers >= 0x11) {
1605                 struct reg *reg;
1606
1607                 reg = etm_reg_lookup(etm, ETM_STATUS);
1608                 if (!reg)
1609                         return ERROR_FAIL;
1610                 if (etm_get_reg(reg) == ERROR_OK) {
1611                         unsigned s = buf_get_u32(reg->value, 0, reg->size);
1612
1613                         command_print(CMD_CTX, "etm: %s%s%s%s",
1614                                 /* bit(1) == progbit */
1615                                 (etm->bcd_vers >= 0x12)
1616                                 ? ((s & (1 << 1))
1617                                 ? "disabled" : "enabled")
1618                                 : "?",
1619                                 ((s & (1 << 3)) && etm->bcd_vers >= 0x31)
1620                                 ? " triggered" : "",
1621                                 ((s & (1 << 2)) && etm->bcd_vers >= 0x12)
1622                                 ? " start/stop" : "",
1623                                 ((s & (1 << 0)) && etm->bcd_vers >= 0x11)
1624                                 ? " untraced-overflow" : "");
1625                 }       /* else ignore and try showing trace port status */
1626         }
1627
1628         /* Trace Port Driver status */
1629         trace_status = etm->capture_driver->status(etm);
1630         if (trace_status == TRACE_IDLE)
1631                 command_print(CMD_CTX, "%s: idle", etm->capture_driver->name);
1632         else {
1633                 static char *completed = " completed";
1634                 static char *running = " is running";
1635                 static char *overflowed = ", overflowed";
1636                 static char *triggered = ", triggered";
1637
1638                 command_print(CMD_CTX, "%s: trace collection%s%s%s",
1639                         etm->capture_driver->name,
1640                         (trace_status & TRACE_RUNNING) ? running : completed,
1641                         (trace_status & TRACE_OVERFLOWED) ? overflowed : "",
1642                         (trace_status & TRACE_TRIGGERED) ? triggered : "");
1643
1644                 if (etm->trace_depth > 0) {
1645                         command_print(CMD_CTX, "%i frames of trace data read",
1646                                 (int)(etm->trace_depth));
1647                 }
1648         }
1649
1650         return ERROR_OK;
1651 }
1652
1653 COMMAND_HANDLER(handle_etm_image_command)
1654 {
1655         struct target *target;
1656         struct arm *arm;
1657         struct etm_context *etm_ctx;
1658
1659         if (CMD_ARGC < 1)
1660                 return ERROR_COMMAND_SYNTAX_ERROR;
1661
1662         target = get_current_target(CMD_CTX);
1663         arm = target_to_arm(target);
1664         if (!is_arm(arm)) {
1665                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1666                 return ERROR_FAIL;
1667         }
1668
1669         etm_ctx = arm->etm;
1670         if (!etm_ctx) {
1671                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1672                 return ERROR_FAIL;
1673         }
1674
1675         if (etm_ctx->image) {
1676                 image_close(etm_ctx->image);
1677                 free(etm_ctx->image);
1678                 command_print(CMD_CTX, "previously loaded image found and closed");
1679         }
1680
1681         etm_ctx->image = malloc(sizeof(struct image));
1682         etm_ctx->image->base_address_set = 0;
1683         etm_ctx->image->start_address_set = 0;
1684
1685         /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
1686         if (CMD_ARGC >= 2) {
1687                 etm_ctx->image->base_address_set = 1;
1688                 COMMAND_PARSE_NUMBER(llong, CMD_ARGV[1], etm_ctx->image->base_address);
1689         } else
1690                 etm_ctx->image->base_address_set = 0;
1691
1692         if (image_open(etm_ctx->image, CMD_ARGV[0],
1693                 (CMD_ARGC >= 3) ? CMD_ARGV[2] : NULL) != ERROR_OK) {
1694                 free(etm_ctx->image);
1695                 etm_ctx->image = NULL;
1696                 return ERROR_FAIL;
1697         }
1698
1699         return ERROR_OK;
1700 }
1701
1702 COMMAND_HANDLER(handle_etm_dump_command)
1703 {
1704         struct fileio file;
1705         struct target *target;
1706         struct arm *arm;
1707         struct etm_context *etm_ctx;
1708         uint32_t i;
1709
1710         if (CMD_ARGC != 1)
1711                 return ERROR_COMMAND_SYNTAX_ERROR;
1712
1713         target = get_current_target(CMD_CTX);
1714         arm = target_to_arm(target);
1715         if (!is_arm(arm)) {
1716                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1717                 return ERROR_FAIL;
1718         }
1719
1720         etm_ctx = arm->etm;
1721         if (!etm_ctx) {
1722                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1723                 return ERROR_FAIL;
1724         }
1725
1726         if (etm_ctx->capture_driver->status == TRACE_IDLE) {
1727                 command_print(CMD_CTX, "trace capture wasn't enabled, no trace data captured");
1728                 return ERROR_OK;
1729         }
1730
1731         if (etm_ctx->capture_driver->status(etm_ctx) & TRACE_RUNNING) {
1732                 /* TODO: if on-the-fly capture is to be supported, this needs to be changed */
1733                 command_print(CMD_CTX, "trace capture not completed");
1734                 return ERROR_FAIL;
1735         }
1736
1737         /* read the trace data if it wasn't read already */
1738         if (etm_ctx->trace_depth == 0)
1739                 etm_ctx->capture_driver->read_trace(etm_ctx);
1740
1741         if (fileio_open(&file, CMD_ARGV[0], FILEIO_WRITE, FILEIO_BINARY) != ERROR_OK)
1742                 return ERROR_FAIL;
1743
1744         fileio_write_u32(&file, etm_ctx->capture_status);
1745         fileio_write_u32(&file, etm_ctx->control);
1746         fileio_write_u32(&file, etm_ctx->trace_depth);
1747
1748         for (i = 0; i < etm_ctx->trace_depth; i++) {
1749                 fileio_write_u32(&file, etm_ctx->trace_data[i].pipestat);
1750                 fileio_write_u32(&file, etm_ctx->trace_data[i].packet);
1751                 fileio_write_u32(&file, etm_ctx->trace_data[i].flags);
1752         }
1753
1754         fileio_close(&file);
1755
1756         return ERROR_OK;
1757 }
1758
1759 COMMAND_HANDLER(handle_etm_load_command)
1760 {
1761         struct fileio file;
1762         struct target *target;
1763         struct arm *arm;
1764         struct etm_context *etm_ctx;
1765         uint32_t i;
1766
1767         if (CMD_ARGC != 1)
1768                 return ERROR_COMMAND_SYNTAX_ERROR;
1769
1770         target = get_current_target(CMD_CTX);
1771         arm = target_to_arm(target);
1772         if (!is_arm(arm)) {
1773                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1774                 return ERROR_FAIL;
1775         }
1776
1777         etm_ctx = arm->etm;
1778         if (!etm_ctx) {
1779                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1780                 return ERROR_FAIL;
1781         }
1782
1783         if (etm_ctx->capture_driver->status(etm_ctx) & TRACE_RUNNING) {
1784                 command_print(CMD_CTX, "trace capture running, stop first");
1785                 return ERROR_FAIL;
1786         }
1787
1788         if (fileio_open(&file, CMD_ARGV[0], FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
1789                 return ERROR_FAIL;
1790
1791         int filesize;
1792         int retval = fileio_size(&file, &filesize);
1793         if (retval != ERROR_OK) {
1794                 fileio_close(&file);
1795                 return retval;
1796         }
1797
1798         if (filesize % 4) {
1799                 command_print(CMD_CTX, "size isn't a multiple of 4, no valid trace data");
1800                 fileio_close(&file);
1801                 return ERROR_FAIL;
1802         }
1803
1804         if (etm_ctx->trace_depth > 0) {
1805                 free(etm_ctx->trace_data);
1806                 etm_ctx->trace_data = NULL;
1807         }
1808
1809         {
1810                 uint32_t tmp;
1811                 fileio_read_u32(&file, &tmp); etm_ctx->capture_status = tmp;
1812                 fileio_read_u32(&file, &tmp); etm_ctx->control = tmp;
1813                 fileio_read_u32(&file, &etm_ctx->trace_depth);
1814         }
1815         etm_ctx->trace_data = malloc(sizeof(struct etmv1_trace_data) * etm_ctx->trace_depth);
1816         if (etm_ctx->trace_data == NULL) {
1817                 command_print(CMD_CTX, "not enough memory to perform operation");
1818                 fileio_close(&file);
1819                 return ERROR_FAIL;
1820         }
1821
1822         for (i = 0; i < etm_ctx->trace_depth; i++) {
1823                 uint32_t pipestat, packet, flags;
1824                 fileio_read_u32(&file, &pipestat);
1825                 fileio_read_u32(&file, &packet);
1826                 fileio_read_u32(&file, &flags);
1827                 etm_ctx->trace_data[i].pipestat = pipestat & 0xff;
1828                 etm_ctx->trace_data[i].packet = packet & 0xffff;
1829                 etm_ctx->trace_data[i].flags = flags;
1830         }
1831
1832         fileio_close(&file);
1833
1834         return ERROR_OK;
1835 }
1836
1837 COMMAND_HANDLER(handle_etm_start_command)
1838 {
1839         struct target *target;
1840         struct arm *arm;
1841         struct etm_context *etm_ctx;
1842         struct reg *etm_ctrl_reg;
1843
1844         target = get_current_target(CMD_CTX);
1845         arm = target_to_arm(target);
1846         if (!is_arm(arm)) {
1847                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1848                 return ERROR_FAIL;
1849         }
1850
1851         etm_ctx = arm->etm;
1852         if (!etm_ctx) {
1853                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1854                 return ERROR_FAIL;
1855         }
1856
1857         /* invalidate old tracing data */
1858         etm_ctx->capture_status = TRACE_IDLE;
1859         if (etm_ctx->trace_depth > 0) {
1860                 free(etm_ctx->trace_data);
1861                 etm_ctx->trace_data = NULL;
1862         }
1863         etm_ctx->trace_depth = 0;
1864
1865         etm_ctrl_reg = etm_reg_lookup(etm_ctx, ETM_CTRL);
1866         if (!etm_ctrl_reg)
1867                 return ERROR_FAIL;
1868
1869         etm_get_reg(etm_ctrl_reg);
1870
1871         /* Clear programming bit (10), set port selection bit (11) */
1872         buf_set_u32(etm_ctrl_reg->value, 10, 2, 0x2);
1873
1874         etm_store_reg(etm_ctrl_reg);
1875         jtag_execute_queue();
1876
1877         etm_ctx->capture_driver->start_capture(etm_ctx);
1878
1879         return ERROR_OK;
1880 }
1881
1882 COMMAND_HANDLER(handle_etm_stop_command)
1883 {
1884         struct target *target;
1885         struct arm *arm;
1886         struct etm_context *etm_ctx;
1887         struct reg *etm_ctrl_reg;
1888
1889         target = get_current_target(CMD_CTX);
1890         arm = target_to_arm(target);
1891         if (!is_arm(arm)) {
1892                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1893                 return ERROR_FAIL;
1894         }
1895
1896         etm_ctx = arm->etm;
1897         if (!etm_ctx) {
1898                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1899                 return ERROR_FAIL;
1900         }
1901
1902         etm_ctrl_reg = etm_reg_lookup(etm_ctx, ETM_CTRL);
1903         if (!etm_ctrl_reg)
1904                 return ERROR_FAIL;
1905
1906         etm_get_reg(etm_ctrl_reg);
1907
1908         /* Set programming bit (10), clear port selection bit (11) */
1909         buf_set_u32(etm_ctrl_reg->value, 10, 2, 0x1);
1910
1911         etm_store_reg(etm_ctrl_reg);
1912         jtag_execute_queue();
1913
1914         etm_ctx->capture_driver->stop_capture(etm_ctx);
1915
1916         return ERROR_OK;
1917 }
1918
1919 COMMAND_HANDLER(handle_etm_trigger_debug_command)
1920 {
1921         struct target *target;
1922         struct arm *arm;
1923         struct etm_context *etm;
1924
1925         target = get_current_target(CMD_CTX);
1926         arm = target_to_arm(target);
1927         if (!is_arm(arm)) {
1928                 command_print(CMD_CTX, "ETM: %s isn't an ARM",
1929                         target_name(target));
1930                 return ERROR_FAIL;
1931         }
1932
1933         etm = arm->etm;
1934         if (!etm) {
1935                 command_print(CMD_CTX, "ETM: no ETM configured for %s",
1936                         target_name(target));
1937                 return ERROR_FAIL;
1938         }
1939
1940         if (CMD_ARGC == 1) {
1941                 struct reg *etm_ctrl_reg;
1942                 bool dbgrq;
1943
1944                 etm_ctrl_reg = etm_reg_lookup(etm, ETM_CTRL);
1945                 if (!etm_ctrl_reg)
1946                         return ERROR_FAIL;
1947
1948                 COMMAND_PARSE_ENABLE(CMD_ARGV[0], dbgrq);
1949                 if (dbgrq)
1950                         etm->control |= ETM_CTRL_DBGRQ;
1951                 else
1952                         etm->control &= ~ETM_CTRL_DBGRQ;
1953
1954                 /* etm->control will be written to hardware
1955                  * the next time an "etm start" is issued.
1956                  */
1957                 buf_set_u32(etm_ctrl_reg->value, 0, 32, etm->control);
1958         }
1959
1960         command_print(CMD_CTX, "ETM: %s debug halt",
1961                 (etm->control & ETM_CTRL_DBGRQ)
1962                 ? "triggers"
1963                 : "does not trigger");
1964         return ERROR_OK;
1965 }
1966
1967 COMMAND_HANDLER(handle_etm_analyze_command)
1968 {
1969         struct target *target;
1970         struct arm *arm;
1971         struct etm_context *etm_ctx;
1972         int retval;
1973
1974         target = get_current_target(CMD_CTX);
1975         arm = target_to_arm(target);
1976         if (!is_arm(arm)) {
1977                 command_print(CMD_CTX, "ETM: current target isn't an ARM");
1978                 return ERROR_FAIL;
1979         }
1980
1981         etm_ctx = arm->etm;
1982         if (!etm_ctx) {
1983                 command_print(CMD_CTX, "current target doesn't have an ETM configured");
1984                 return ERROR_FAIL;
1985         }
1986
1987         retval = etmv1_analyze_trace(etm_ctx, CMD_CTX);
1988         if (retval != ERROR_OK) {
1989                 /* FIX! error should be reported inside etmv1_analyze_trace() */
1990                 switch (retval) {
1991                         case ERROR_ETM_ANALYSIS_FAILED:
1992                                 command_print(CMD_CTX,
1993                                         "further analysis failed (corrupted trace data or just end of data");
1994                                 break;
1995                         case ERROR_TRACE_INSTRUCTION_UNAVAILABLE:
1996                                 command_print(CMD_CTX,
1997                                         "no instruction for current address available, analysis aborted");
1998                                 break;
1999                         case ERROR_TRACE_IMAGE_UNAVAILABLE:
2000                                 command_print(CMD_CTX, "no image available for trace analysis");
2001                                 break;
2002                         default:
2003                                 command_print(CMD_CTX, "unknown error");
2004                 }
2005         }
2006
2007         return retval;
2008 }
2009
2010 static const struct command_registration etm_config_command_handlers[] = {
2011         {
2012                 /* NOTE:  with ADIv5, ETMs are accessed by DAP operations,
2013                  * possibly over SWD, not JTAG scanchain 6 of 'target'.
2014                  *
2015                  * Also, these parameters don't match ETM v3+ modules...
2016                  */
2017                 .name = "config",
2018                 .handler = handle_etm_config_command,
2019                 .mode = COMMAND_CONFIG,
2020                 .help = "Set up ETM output port.",
2021                 .usage = "target port_width port_mode clocking capture_driver",
2022         },
2023         COMMAND_REGISTRATION_DONE
2024 };
2025 const struct command_registration etm_command_handlers[] = {
2026         {
2027                 .name = "etm",
2028                 .mode = COMMAND_ANY,
2029                 .help = "Embedded Trace Macrocell command group",
2030                 .usage = "",
2031                 .chain = etm_config_command_handlers,
2032         },
2033         COMMAND_REGISTRATION_DONE
2034 };
2035
2036 static const struct command_registration etm_exec_command_handlers[] = {
2037         {
2038                 .name = "tracemode",
2039                 .handler = handle_etm_tracemode_command,
2040                 .mode = COMMAND_EXEC,
2041                 .help = "configure/display trace mode",
2042                 .usage = "('none'|'data'|'address'|'all') "
2043                         "context_id_bits "
2044                         "['enable'|'disable'] "
2045                         "['enable'|'disable']",
2046         },
2047         {
2048                 .name = "info",
2049                 .handler = handle_etm_info_command,
2050                 .mode = COMMAND_EXEC,
2051                 .usage = "",
2052                 .help = "display info about the current target's ETM",
2053         },
2054         {
2055                 .name = "status",
2056                 .handler = handle_etm_status_command,
2057                 .mode = COMMAND_EXEC,
2058                 .usage = "",
2059                 .help = "display current target's ETM status",
2060         },
2061         {
2062                 .name = "start",
2063                 .handler = handle_etm_start_command,
2064                 .mode = COMMAND_EXEC,
2065                 .usage = "",
2066                 .help = "start ETM trace collection",
2067         },
2068         {
2069                 .name = "stop",
2070                 .handler = handle_etm_stop_command,
2071                 .mode = COMMAND_EXEC,
2072                 .usage = "",
2073                 .help = "stop ETM trace collection",
2074         },
2075         {
2076                 .name = "trigger_debug",
2077                 .handler = handle_etm_trigger_debug_command,
2078                 .mode = COMMAND_EXEC,
2079                 .help = "enable/disable debug entry on trigger",
2080                 .usage = "['enable'|'disable']",
2081         },
2082         {
2083                 .name = "analyze",
2084                 .handler = handle_etm_analyze_command,
2085                 .mode = COMMAND_EXEC,
2086                 .usage = "",
2087                 .help = "analyze collected ETM trace",
2088         },
2089         {
2090                 .name = "image",
2091                 .handler = handle_etm_image_command,
2092                 .mode = COMMAND_EXEC,
2093                 .help = "load image from file with optional offset",
2094                 .usage = "<file> [base address] [type]",
2095         },
2096         {
2097                 .name = "dump",
2098                 .handler = handle_etm_dump_command,
2099                 .mode = COMMAND_EXEC,
2100                 .help = "dump captured trace data to file",
2101                 .usage = "filename",
2102         },
2103         {
2104                 .name = "load",
2105                 .handler = handle_etm_load_command,
2106                 .mode = COMMAND_EXEC,
2107                 .usage = "",
2108                 .help = "load trace data for analysis <file>",
2109         },
2110         COMMAND_REGISTRATION_DONE
2111 };
2112
2113 static int etm_register_user_commands(struct command_context *cmd_ctx)
2114 {
2115         struct command *etm_cmd = command_find_in_context(cmd_ctx, "etm");
2116         return register_commands(cmd_ctx, etm_cmd, etm_exec_command_handlers);
2117 }