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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 "armv4_5.h"
  25 #include "etb.h"
  26 #include "image.h"
  27 #include "arm_disassembler.h"
  28
  29
  30 /*
  31  * ARM "Embedded Trace Macrocell" (ETM) support -- direct JTAG access.
  32  *
  33  * ETM modules collect instruction and/or data trace information, compress
  34  * it, and transfer it to a debugging host through either a (buffered) trace
  35  * port (often a 38-pin Mictor connector) or an Embedded Trace Buffer (ETB).
  36  *
  37  * There are several generations of these modules.  Original versions have
  38  * JTAG access through a dedicated scan chain.  Recent versions have added
  39  * access via coprocessor instructions, memory addressing, and the ARM Debug
  40  * Interface v5 (ADIv5); and phased out direct JTAG access.
  41  *
  42  * This code supports up to the ETMv1.3 architecture, as seen in ETM9 and
  43  * most common ARM9 systems.  Note: "CoreSight ETM9" implements ETMv3.2,
  44  * implying non-JTAG connectivity options.
  45  *
  46  * Relevant documentation includes:
  47  *  ARM DDI 0157G ... ETM9 (r2p2) Technical Reference Manual
  48  *  ARM DDI 0315B ... CoreSight ETM9 (r0p1) Technical Reference Manual
  49  *  ARM IHI 0014O ... Embedded Trace Macrocell, Architecture Specification
  50  */
  51
  52 #define ARRAY_SIZE(x)   ((int)(sizeof(x)/sizeof((x)[0])))
  53
  54 enum {
  55         RO,                             /* read/only */
  56         WO,                             /* write/only */
  57         RW,                             /* read/write */
  58 };
  59
  60 struct etm_reg_info {
  61         uint8_t         addr;
  62         uint8_t         size;           /* low-N of 32 bits */
  63         uint8_t         mode;           /* RO, WO, RW */
  64         uint8_t         bcd_vers;       /* 1.0, 2.0, etc */
  65         char            *name;
  66 };
  67
  68 /*
  69  * Registers 0..0x7f are JTAG-addressable using scanchain 6.
  70  * (Or on some processors, through coprocessor operations.)
  71  * Newer versions of ETM make some W/O registers R/W, and
  72  * provide definitions for some previously-unused bits.
  73  */
  74
  75 /* core registers used to version/configure the ETM */
  76 static const struct etm_reg_info etm_core[] = {
  77         /* NOTE: we "know" the order here ... */
  78         { ETM_CONFIG, 32, RO, 0x10, "ETM_config", },
  79         { ETM_ID, 32, RO, 0x20, "ETM_id", },
  80 };
  81
  82 /* basic registers that are always there given the right ETM version */
  83 static const struct etm_reg_info etm_basic[] = {
  84         /* ETM Trace Registers */
  85         { ETM_CTRL, 32, RW, 0x10, "ETM_ctrl", },
  86         { ETM_TRIG_EVENT, 17, WO, 0x10, "ETM_trig_event", },
  87         { ETM_ASIC_CTRL,  8, WO, 0x10, "ETM_asic_ctrl", },
  88         { ETM_STATUS,  3, RO, 0x11, "ETM_status", },
  89         { ETM_SYS_CONFIG,  9, RO, 0x12, "ETM_sys_config", },
  90
  91         /* TraceEnable configuration */
  92         { ETM_TRACE_RESOURCE_CTRL, 32, WO, 0x12, "ETM_trace_resource_ctrl", },
  93         { ETM_TRACE_EN_CTRL2, 16, WO, 0x12, "ETM_trace_en_ctrl2", },
  94         { ETM_TRACE_EN_EVENT, 17, WO, 0x10, "ETM_trace_en_event", },
  95         { ETM_TRACE_EN_CTRL1, 26, WO, 0x10, "ETM_trace_en_ctrl1", },
  96
  97         /* ViewData configuration (data trace) */
  98         { ETM_VIEWDATA_EVENT, 17, WO, 0x10, "ETM_viewdata_event", },
  99         { ETM_VIEWDATA_CTRL1, 32, WO, 0x10, "ETM_viewdata_ctrl1", },
 100         { ETM_VIEWDATA_CTRL2, 32, WO, 0x10, "ETM_viewdata_ctrl2", },
 101         { ETM_VIEWDATA_CTRL3, 17, WO, 0x10, "ETM_viewdata_ctrl3", },
 102
 103         /* REVISIT exclude VIEWDATA_CTRL2 when it's not there */
 104
 105         { 0x78, 12, WO, 0x20, "ETM_sync_freq", },
 106         { 0x7a, 22, RO, 0x31, "ETM_config_code_ext", },
 107         { 0x7b, 32, WO, 0x31, "ETM_ext_input_select", },
 108         { 0x7c, 32, WO, 0x34, "ETM_trace_start_stop", },
 109         { 0x7d, 8, WO, 0x34, "ETM_behavior_control", },
 110 };
 111
 112 static const struct etm_reg_info etm_fifofull[] = {
 113         /* FIFOFULL configuration */
 114         { ETM_FIFOFULL_REGION, 25, WO, 0x10, "ETM_fifofull_region", },
 115         { ETM_FIFOFULL_LEVEL,  8, WO, 0x10, "ETM_fifofull_level", },
 116 };
 117
 118 static const struct etm_reg_info etm_addr_comp[] = {
 119         /* Address comparator register pairs */
 120 #define ADDR_COMPARATOR(i) \
 121                 { ETM_ADDR_COMPARATOR_VALUE + (i) - 1, 32, WO, 0x10, \
 122                                 "ETM_addr_" #i "_comparator_value", }, \
 123                 { ETM_ADDR_ACCESS_TYPE + (i) - 1,  7, WO, 0x10, \
 124                                 "ETM_addr_" #i "_access_type", }
 125         ADDR_COMPARATOR(1),
 126         ADDR_COMPARATOR(2),
 127         ADDR_COMPARATOR(3),
 128         ADDR_COMPARATOR(4),
 129         ADDR_COMPARATOR(5),
 130         ADDR_COMPARATOR(6),
 131         ADDR_COMPARATOR(7),
 132         ADDR_COMPARATOR(8),
 133
 134         ADDR_COMPARATOR(9),
 135         ADDR_COMPARATOR(10),
 136         ADDR_COMPARATOR(11),
 137         ADDR_COMPARATOR(12),
 138         ADDR_COMPARATOR(13),
 139         ADDR_COMPARATOR(14),
 140         ADDR_COMPARATOR(15),
 141         ADDR_COMPARATOR(16),
 142 #undef ADDR_COMPARATOR
 143 };
 144
 145 static const struct etm_reg_info etm_data_comp[] = {
 146         /* Data Value Comparators (NOTE: odd addresses are reserved) */
 147 #define DATA_COMPARATOR(i) \
 148                 { ETM_DATA_COMPARATOR_VALUE + 2*(i) - 1, 32, WO, 0x10, \
 149                                 "ETM_data_" #i "_comparator_value", }, \
 150                 { ETM_DATA_COMPARATOR_MASK + 2*(i) - 1, 32, WO, 0x10, \
 151                                 "ETM_data_" #i "_comparator_mask", }
 152         DATA_COMPARATOR(1),
 153         DATA_COMPARATOR(2),
 154         DATA_COMPARATOR(3),
 155         DATA_COMPARATOR(4),
 156         DATA_COMPARATOR(5),
 157         DATA_COMPARATOR(6),
 158         DATA_COMPARATOR(7),
 159         DATA_COMPARATOR(8),
 160 #undef DATA_COMPARATOR
 161 };
 162
 163 static const struct etm_reg_info etm_counters[] = {
 164 #define ETM_COUNTER(i) \
 165                 { ETM_COUNTER_RELOAD_VALUE + (i) - 1, 16, WO, 0x10, \
 166                                 "ETM_counter_" #i "_reload_value", }, \
 167                 { ETM_COUNTER_ENABLE + (i) - 1, 18, WO, 0x10, \
 168                                 "ETM_counter_" #i "_enable", }, \
 169                 { ETM_COUNTER_RELOAD_EVENT + (i) - 1, 17, WO, 0x10, \
 170                                 "ETM_counter_" #i "_reload_event", }, \
 171                 { ETM_COUNTER_VALUE + (i) - 1, 16, RO, 0x10, \
 172                                 "ETM_counter_" #i "_value", }
 173         ETM_COUNTER(1),
 174         ETM_COUNTER(2),
 175         ETM_COUNTER(3),
 176         ETM_COUNTER(4),
 177 #undef ETM_COUNTER
 178 };
 179
 180 static const struct etm_reg_info etm_sequencer[] = {
 181 #define ETM_SEQ(i) \
 182                 { ETM_SEQUENCER_EVENT + (i), 17, WO, 0x10, \
 183                                 "ETM_sequencer_event" #i, }
 184         ETM_SEQ(0),                             /* 1->2 */
 185         ETM_SEQ(1),                             /* 2->1 */
 186         ETM_SEQ(2),                             /* 2->3 */
 187         ETM_SEQ(3),                             /* 3->1 */
 188         ETM_SEQ(4),                             /* 3->2 */
 189         ETM_SEQ(5),                             /* 1->3 */
 190 #undef ETM_SEQ
 191         /* 0x66 reserved */
 192         { ETM_SEQUENCER_STATE,  2, RO, 0x10, "ETM_sequencer_state", },
 193 };
 194
 195 static const struct etm_reg_info etm_outputs[] = {
 196 #define ETM_OUTPUT(i) \
 197                 { ETM_EXTERNAL_OUTPUT + (i) - 1, 17, WO, 0x10, \
 198                                 "ETM_external_output" #i, }
 199
 200         ETM_OUTPUT(1),
 201         ETM_OUTPUT(2),
 202         ETM_OUTPUT(3),
 203         ETM_OUTPUT(4),
 204 #undef ETM_OUTPUT
 205 };
 206
 207 #if 0
 208         /* registers from 0x6c..0x7f were added after ETMv1.3 */
 209
 210         /* Context ID Comparators */
 211         { 0x6c, 32, RO, 0x20, "ETM_contextid_comparator_value1", }
 212         { 0x6d, 32, RO, 0x20, "ETM_contextid_comparator_value2", }
 213         { 0x6e, 32, RO, 0x20, "ETM_contextid_comparator_value3", }
 214         { 0x6f, 32, RO, 0x20, "ETM_contextid_comparator_mask", }
 215 #endif
 216
 217 static int etm_reg_arch_type = -1;
 218
 219 static int etm_get_reg(reg_t *reg);
 220 static int etm_read_reg_w_check(reg_t *reg,
 221                 uint8_t* check_value, uint8_t* check_mask);
 222 static int etm_register_user_commands(struct command_context_s *cmd_ctx);
 223 static int etm_set_reg_w_exec(reg_t *reg, uint8_t *buf);
 224 static int etm_write_reg(reg_t *reg, uint32_t value);
 225
 226 static command_t *etm_cmd;
 227
 228
 229 /* Look up register by ID ... most ETM instances only
 230  * support a subset of the possible registers.
 231  */
 232 static reg_t *etm_reg_lookup(etm_context_t *etm_ctx, unsigned id)
 233 {
 234         reg_cache_t *cache = etm_ctx->reg_cache;
 235         int i;
 236
 237         for (i = 0; i < cache->num_regs; i++) {
 238                 struct etm_reg_s *reg = cache->reg_list[i].arch_info;
 239
 240                 if (reg->reg_info->addr == id)
 241                         return &cache->reg_list[i];
 242         }
 243
 244         /* caller asking for nonexistent register is a bug! */
 245         /* REVISIT say which of the N targets was involved */
 246         LOG_ERROR("ETM: register 0x%02x not available", id);
 247         return NULL;
 248 }
 249
 250 static void etm_reg_add(unsigned bcd_vers, arm_jtag_t *jtag_info,
 251                 reg_cache_t *cache, etm_reg_t *ereg,
 252                 const struct etm_reg_info *r, unsigned nreg)
 253 {
 254         reg_t *reg = cache->reg_list;
 255
 256         reg += cache->num_regs;
 257         ereg += cache->num_regs;
 258
 259         /* add up to "nreg" registers from "r", if supported by this
 260          * version of the ETM, to the specified cache.
 261          */
 262         for (; nreg--; r++) {
 263
 264                 /* this ETM may be too old to have some registers */
 265                 if (r->bcd_vers > bcd_vers)
 266                         continue;
 267
 268                 reg->name = r->name;
 269                 reg->size = r->size;
 270                 reg->value = &ereg->value;
 271                 reg->arch_info = ereg;
 272                 reg->arch_type = etm_reg_arch_type;
 273                 reg++;
 274                 cache->num_regs++;
 275
 276                 ereg->reg_info = r;
 277                 ereg->jtag_info = jtag_info;
 278                 ereg++;
 279         }
 280 }
 281
 282 reg_cache_t *etm_build_reg_cache(target_t *target,
 283                 arm_jtag_t *jtag_info, etm_context_t *etm_ctx)
 284 {
 285         reg_cache_t *reg_cache = malloc(sizeof(reg_cache_t));
 286         reg_t *reg_list = NULL;
 287         etm_reg_t *arch_info = NULL;
 288         unsigned bcd_vers, config;
 289
 290         /* register a register arch-type for etm registers only once */
 291         if (etm_reg_arch_type == -1)
 292                 etm_reg_arch_type = register_reg_arch_type(etm_get_reg,
 293                                 etm_set_reg_w_exec);
 294
 295         /* the actual registers are kept in two arrays */
 296         reg_list = calloc(128, sizeof(reg_t));
 297         arch_info = calloc(128, sizeof(etm_reg_t));
 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                         free(reg_cache);
 353                         free(reg_list);
 354                         free(arch_info);
 355                         return ERROR_OK;
 356                 }
 357         }
 358         etm_ctx->bcd_vers = bcd_vers;
 359         LOG_INFO("ETM v%d.%d", bcd_vers >> 4, bcd_vers & 0xf);
 360
 361         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 362                         etm_basic, ARRAY_SIZE(etm_basic));
 363
 364         /* address and data comparators; counters; outputs */
 365         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 366                         etm_addr_comp, 4 * (0x0f & (config >> 0)));
 367         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 368                         etm_data_comp, 2 * (0x0f & (config >> 4)));
 369         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 370                         etm_counters, 4 * (0x07 & (config >> 13)));
 371         etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 372                         etm_outputs, (0x07 & (config >> 20)));
 373
 374         /* FIFOFULL presence is optional
 375          * REVISIT for ETMv1.2 and later, don't bother adding this
 376          * unless ETM_SYS_CONFIG says it's also *supported* ...
 377          */
 378         if (config & (1 << 23))
 379                 etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 380                                 etm_fifofull, ARRAY_SIZE(etm_fifofull));
 381
 382         /* sequencer is optional (for state-dependant triggering) */
 383         if (config & (1 << 16))
 384                 etm_reg_add(bcd_vers, jtag_info, reg_cache, arch_info,
 385                                 etm_sequencer, ARRAY_SIZE(etm_sequencer));
 386
 387         /* REVISIT could realloc and likely save half the memory
 388          * in the two chunks we allocated...
 389          */
 390
 391         /* the ETM might have an ETB connected */
 392         if (strcmp(etm_ctx->capture_driver->name, "etb") == 0)
 393         {
 394                 etb_t *etb = etm_ctx->capture_driver_priv;
 395
 396                 if (!etb)
 397                 {
 398                         LOG_ERROR("etb selected as etm capture driver, but no ETB configured");
 399                         free(reg_cache);
 400                         free(reg_list);
 401                         free(arch_info);
 402                         return ERROR_OK;
 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
 414 static int etm_read_reg(reg_t *reg)
 415 {
 416         return etm_read_reg_w_check(reg, NULL, NULL);
 417 }
 418
 419 static int etm_store_reg(reg_t *reg)
 420 {
 421         return etm_write_reg(reg, buf_get_u32(reg->value, 0, reg->size));
 422 }
 423
 424 int etm_setup(target_t *target)
 425 {
 426         int retval;
 427         uint32_t etm_ctrl_value;
 428         struct arm *arm = target_to_arm(target);
 429         etm_context_t *etm_ctx = arm->etm;
 430         reg_t *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, etm_ctrl_reg->size);
 439
 440         /* clear the ETM powerdown bit (0) */
 441         etm_ctrl_value &= ~0x1;
 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_PORT_CLOCK_MASK)
 450                 | etm_ctx->portmode;
 451
 452         buf_set_u32(etm_ctrl_reg->value, 0, etm_ctrl_reg->size, etm_ctrl_value);
 453         etm_store_reg(etm_ctrl_reg);
 454
 455         if ((retval = jtag_execute_queue()) != ERROR_OK)
 456                 return retval;
 457
 458         /* REVISIT for ETMv3.0 and later, read ETM_sys_config to
 459          * verify that those width and mode settings are OK ...
 460          */
 461
 462         if ((retval = etm_ctx->capture_driver->init(etm_ctx)) != ERROR_OK)
 463         {
 464                 LOG_ERROR("ETM capture driver initialization failed");
 465                 return retval;
 466         }
 467         return ERROR_OK;
 468 }
 469
 470 static int etm_get_reg(reg_t *reg)
 471 {
 472         int retval;
 473
 474         if ((retval = etm_read_reg(reg)) != ERROR_OK)
 475         {
 476                 LOG_ERROR("BUG: error scheduling etm register read");
 477                 return retval;
 478         }
 479
 480         if ((retval = jtag_execute_queue()) != ERROR_OK)
 481         {
 482                 LOG_ERROR("register read failed");
 483                 return retval;
 484         }
 485
 486         return ERROR_OK;
 487 }
 488
 489 static int etm_read_reg_w_check(reg_t *reg,
 490                 uint8_t* check_value, uint8_t* check_mask)
 491 {
 492         etm_reg_t *etm_reg = reg->arch_info;
 493         const struct etm_reg_info *r = etm_reg->reg_info;
 494         uint8_t reg_addr = r->addr & 0x7f;
 495         scan_field_t fields[3];
 496
 497         if (etm_reg->reg_info->mode == WO) {
 498                 LOG_ERROR("BUG: can't read write-only register %s", r->name);
 499                 return ERROR_INVALID_ARGUMENTS;
 500         }
 501
 502         LOG_DEBUG("%s (%u)", r->name, reg_addr);
 503
 504         jtag_set_end_state(TAP_IDLE);
 505         arm_jtag_scann(etm_reg->jtag_info, 0x6);
 506         arm_jtag_set_instr(etm_reg->jtag_info, etm_reg->jtag_info->intest_instr, NULL);
 507
 508         fields[0].tap = etm_reg->jtag_info->tap;
 509         fields[0].num_bits = 32;
 510         fields[0].out_value = reg->value;
 511         fields[0].in_value = NULL;
 512         fields[0].check_value = NULL;
 513         fields[0].check_mask = NULL;
 514
 515         fields[1].tap = etm_reg->jtag_info->tap;
 516         fields[1].num_bits = 7;
 517         fields[1].out_value = malloc(1);
 518         buf_set_u32(fields[1].out_value, 0, 7, reg_addr);
 519         fields[1].in_value = NULL;
 520         fields[1].check_value = NULL;
 521         fields[1].check_mask = NULL;
 522
 523         fields[2].tap = etm_reg->jtag_info->tap;
 524         fields[2].num_bits = 1;
 525         fields[2].out_value = malloc(1);
 526         buf_set_u32(fields[2].out_value, 0, 1, 0);
 527         fields[2].in_value = NULL;
 528         fields[2].check_value = NULL;
 529         fields[2].check_mask = NULL;
 530
 531         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 532
 533         fields[0].in_value = reg->value;
 534         fields[0].check_value = check_value;
 535         fields[0].check_mask = check_mask;
 536
 537         jtag_add_dr_scan_check(3, fields, jtag_get_end_state());
 538
 539         free(fields[1].out_value);
 540         free(fields[2].out_value);
 541
 542         return ERROR_OK;
 543 }
 544
 545 static int etm_set_reg(reg_t *reg, uint32_t value)
 546 {
 547         int retval;
 548
 549         if ((retval = etm_write_reg(reg, value)) != ERROR_OK)
 550         {
 551                 LOG_ERROR("BUG: error scheduling etm register write");
 552                 return retval;
 553         }
 554
 555         buf_set_u32(reg->value, 0, reg->size, value);
 556         reg->valid = 1;
 557         reg->dirty = 0;
 558
 559         return ERROR_OK;
 560 }
 561
 562 static int etm_set_reg_w_exec(reg_t *reg, uint8_t *buf)
 563 {
 564         int retval;
 565
 566         etm_set_reg(reg, buf_get_u32(buf, 0, reg->size));
 567
 568         if ((retval = jtag_execute_queue()) != ERROR_OK)
 569         {
 570                 LOG_ERROR("register write failed");
 571                 return retval;
 572         }
 573         return ERROR_OK;
 574 }
 575
 576 static int etm_write_reg(reg_t *reg, uint32_t value)
 577 {
 578         etm_reg_t *etm_reg = reg->arch_info;
 579         const struct etm_reg_info *r = etm_reg->reg_info;
 580         uint8_t reg_addr = r->addr & 0x7f;
 581         scan_field_t fields[3];
 582
 583         if (etm_reg->reg_info->mode == RO) {
 584                 LOG_ERROR("BUG: can't write read--only register %s", r->name);
 585                 return ERROR_INVALID_ARGUMENTS;
 586         }
 587
 588         LOG_DEBUG("%s (%u): 0x%8.8" PRIx32 "", r->name, reg_addr, value);
 589
 590         jtag_set_end_state(TAP_IDLE);
 591         arm_jtag_scann(etm_reg->jtag_info, 0x6);
 592         arm_jtag_set_instr(etm_reg->jtag_info, etm_reg->jtag_info->intest_instr, NULL);
 593
 594         fields[0].tap = etm_reg->jtag_info->tap;
 595         fields[0].num_bits = 32;
 596         uint8_t tmp1[4];
 597         fields[0].out_value = tmp1;
 598         buf_set_u32(fields[0].out_value, 0, 32, value);
 599         fields[0].in_value = NULL;
 600
 601         fields[1].tap = etm_reg->jtag_info->tap;
 602         fields[1].num_bits = 7;
 603         uint8_t tmp2;
 604         fields[1].out_value = &tmp2;
 605         buf_set_u32(fields[1].out_value, 0, 7, reg_addr);
 606         fields[1].in_value = NULL;
 607
 608         fields[2].tap = etm_reg->jtag_info->tap;
 609         fields[2].num_bits = 1;
 610         uint8_t tmp3;
 611         fields[2].out_value = &tmp3;
 612         buf_set_u32(fields[2].out_value, 0, 1, 1);
 613         fields[2].in_value = NULL;
 614
 615         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 616
 617         return ERROR_OK;
 618 }
 619
 620
 621 /* ETM trace analysis functionality
 622  *
 623  */
 624 extern etm_capture_driver_t etm_dummy_capture_driver;
 625 #if BUILD_OOCD_TRACE == 1
 626 extern etm_capture_driver_t oocd_trace_capture_driver;
 627 #endif
 628
 629 static etm_capture_driver_t *etm_capture_drivers[] =
 630 {
 631         &etb_capture_driver,
 632         &etm_dummy_capture_driver,
 633 #if BUILD_OOCD_TRACE == 1
 634         &oocd_trace_capture_driver,
 635 #endif
 636         NULL
 637 };
 638
 639 static int etm_read_instruction(etm_context_t *ctx, arm_instruction_t *instruction)
 640 {
 641         int i;
 642         int section = -1;
 643         uint32_t size_read;
 644         uint32_t opcode;
 645         int retval;
 646
 647         if (!ctx->image)
 648                 return ERROR_TRACE_IMAGE_UNAVAILABLE;
 649
 650         /* search for the section the current instruction belongs to */
 651         for (i = 0; i < ctx->image->num_sections; i++)
 652         {
 653                 if ((ctx->image->sections[i].base_address <= ctx->current_pc) &&
 654                         (ctx->image->sections[i].base_address + ctx->image->sections[i].size > ctx->current_pc))
 655                 {
 656                         section = i;
 657                         break;
 658                 }
 659         }
 660
 661         if (section == -1)
 662         {
 663                 /* current instruction couldn't be found in the image */
 664                 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
 665         }
 666
 667         if (ctx->core_state == ARMV4_5_STATE_ARM)
 668         {
 669                 uint8_t buf[4];
 670                 if ((retval = image_read_section(ctx->image, section,
 671                         ctx->current_pc - ctx->image->sections[section].base_address,
 672                         4, buf, &size_read)) != ERROR_OK)
 673                 {
 674                         LOG_ERROR("error while reading instruction: %i", retval);
 675                         return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
 676                 }
 677                 opcode = target_buffer_get_u32(ctx->target, buf);
 678                 arm_evaluate_opcode(opcode, ctx->current_pc, instruction);
 679         }
 680         else if (ctx->core_state == ARMV4_5_STATE_THUMB)
 681         {
 682                 uint8_t buf[2];
 683                 if ((retval = image_read_section(ctx->image, section,
 684                         ctx->current_pc - ctx->image->sections[section].base_address,
 685                         2, buf, &size_read)) != ERROR_OK)
 686                 {
 687                         LOG_ERROR("error while reading instruction: %i", retval);
 688                         return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
 689                 }
 690                 opcode = target_buffer_get_u16(ctx->target, buf);
 691                 thumb_evaluate_opcode(opcode, ctx->current_pc, instruction);
 692         }
 693         else if (ctx->core_state == ARMV4_5_STATE_JAZELLE)
 694         {
 695                 LOG_ERROR("BUG: tracing of jazelle code not supported");
 696                 return ERROR_FAIL;
 697         }
 698         else
 699         {
 700                 LOG_ERROR("BUG: unknown core state encountered");
 701                 return ERROR_FAIL;
 702         }
 703
 704         return ERROR_OK;
 705 }
 706
 707 static int etmv1_next_packet(etm_context_t *ctx, uint8_t *packet, int apo)
 708 {
 709         while (ctx->data_index < ctx->trace_depth)
 710         {
 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                 {
 715                         if (ctx->trace_data[ctx->data_index].flags & ETMV1_TRACESYNC_CYCLE)
 716                                 apo--;
 717
 718                         if (apo > 0)
 719                         {
 720                                 ctx->data_index++;
 721                                 ctx->data_half = 0;
 722                         }
 723                         continue;
 724                 }
 725
 726                 /* no tracedata output during a TD cycle
 727                  * or in a trigger cycle */
 728                 if ((ctx->trace_data[ctx->data_index].pipestat == STAT_TD)
 729                         || (ctx->trace_data[ctx->data_index].flags & ETMV1_TRIGGER_CYCLE))
 730                 {
 731                         ctx->data_index++;
 732                         ctx->data_half = 0;
 733                         continue;
 734                 }
 735
 736                 if ((ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_16BIT)
 737                 {
 738                         if (ctx->data_half == 0)
 739                         {
 740                                 *packet = ctx->trace_data[ctx->data_index].packet & 0xff;
 741                                 ctx->data_half = 1;
 742                         }
 743                         else
 744                         {
 745                                 *packet = (ctx->trace_data[ctx->data_index].packet & 0xff00) >> 8;
 746                                 ctx->data_half = 0;
 747                                 ctx->data_index++;
 748                         }
 749                 }
 750                 else if ((ctx->portmode & ETM_PORT_WIDTH_MASK) == ETM_PORT_8BIT)
 751                 {
 752                         *packet = ctx->trace_data[ctx->data_index].packet & 0xff;
 753                         ctx->data_index++;
 754                 }
 755                 else
 756                 {
 757                         /* on a 4-bit port, a packet will be output during two consecutive cycles */
 758                         if (ctx->data_index > (ctx->trace_depth - 2))
 759                                 return -1;
 760
 761                         *packet = ctx->trace_data[ctx->data_index].packet & 0xf;
 762                         *packet |= (ctx->trace_data[ctx->data_index + 1].packet & 0xf) << 4;
 763                         ctx->data_index += 2;
 764                 }
 765
 766                 return 0;
 767         }
 768
 769         return -1;
 770 }
 771
 772 static int etmv1_branch_address(etm_context_t *ctx)
 773 {
 774         int retval;
 775         uint8_t packet;
 776         int shift = 0;
 777         int apo;
 778         uint32_t i;
 779
 780         /* quit analysis if less than two cycles are left in the trace
 781          * because we can't extract the APO */
 782         if (ctx->data_index > (ctx->trace_depth - 2))
 783                 return -1;
 784
 785         /* a BE could be output during an APO cycle, skip the current
 786          * and continue with the new one */
 787         if (ctx->trace_data[ctx->pipe_index + 1].pipestat & 0x4)
 788                 return 1;
 789         if (ctx->trace_data[ctx->pipe_index + 2].pipestat & 0x4)
 790                 return 2;
 791
 792         /* address packet offset encoded in the next two cycles' pipestat bits */
 793         apo = ctx->trace_data[ctx->pipe_index + 1].pipestat & 0x3;
 794         apo |= (ctx->trace_data[ctx->pipe_index + 2].pipestat & 0x3) << 2;
 795
 796         /* count number of tracesync cycles between current pipe_index and data_index
 797          * i.e. the number of tracesyncs that data_index already passed by
 798          * to subtract them from the APO */
 799         for (i = ctx->pipe_index; i < ctx->data_index; i++)
 800         {
 801                 if (ctx->trace_data[ctx->pipe_index + 1].pipestat & ETMV1_TRACESYNC_CYCLE)
 802                         apo--;
 803         }
 804
 805         /* extract up to four 7-bit packets */
 806         do {
 807                 if ((retval = etmv1_next_packet(ctx, &packet, (shift == 0) ? apo + 1 : 0)) != 0)
 808                         return -1;
 809                 ctx->last_branch &= ~(0x7f << shift);
 810                 ctx->last_branch |= (packet & 0x7f) << shift;
 811                 shift += 7;
 812         } while ((packet & 0x80) && (shift < 28));
 813
 814         /* one last packet holding 4 bits of the address, plus the branch reason code */
 815         if ((shift == 28) && (packet & 0x80))
 816         {
 817                 if ((retval = etmv1_next_packet(ctx, &packet, 0)) != 0)
 818                         return -1;
 819                 ctx->last_branch &= 0x0fffffff;
 820                 ctx->last_branch |= (packet & 0x0f) << 28;
 821                 ctx->last_branch_reason = (packet & 0x70) >> 4;
 822                 shift += 4;
 823         }
 824         else
 825         {
 826                 ctx->last_branch_reason = 0;
 827         }
 828
 829         if (shift == 32)
 830         {
 831                 ctx->pc_ok = 1;
 832         }
 833
 834         /* if a full address was output, we might have branched into Jazelle state */
 835         if ((shift == 32) && (packet & 0x80))
 836         {
 837                 ctx->core_state = ARMV4_5_STATE_JAZELLE;
 838         }
 839         else
 840         {
 841                 /* if we didn't branch into Jazelle state, the current processor state is
 842                  * encoded in bit 0 of the branch target address */
 843                 if (ctx->last_branch & 0x1)
 844                 {
 845                         ctx->core_state = ARMV4_5_STATE_THUMB;
 846                         ctx->last_branch &= ~0x1;
 847                 }
 848                 else
 849                 {
 850                         ctx->core_state = ARMV4_5_STATE_ARM;
 851                         ctx->last_branch &= ~0x3;
 852                 }
 853         }
 854
 855         return 0;
 856 }
 857
 858 static int etmv1_data(etm_context_t *ctx, int size, uint32_t *data)
 859 {
 860         int j;
 861         uint8_t buf[4];
 862         int retval;
 863
 864         for (j = 0; j < size; j++)
 865         {
 866                 if ((retval = etmv1_next_packet(ctx, &buf[j], 0)) != 0)
 867                         return -1;
 868         }
 869
 870         if (size == 8)
 871         {
 872                 LOG_ERROR("TODO: add support for 64-bit values");
 873                 return -1;
 874         }
 875         else if (size == 4)
 876                 *data = target_buffer_get_u32(ctx->target, buf);
 877         else if (size == 2)
 878                 *data = target_buffer_get_u16(ctx->target, buf);
 879         else if (size == 1)
 880                 *data = buf[0];
 881         else
 882                 return -1;
 883
 884         return 0;
 885 }
 886
 887 static int etmv1_analyze_trace(etm_context_t *ctx, struct command_context_s *cmd_ctx)
 888 {
 889         int retval;
 890         arm_instruction_t instruction;
 891
 892         /* read the trace data if it wasn't read already */
 893         if (ctx->trace_depth == 0)
 894                 ctx->capture_driver->read_trace(ctx);
 895
 896         /* start at the beginning of the captured trace */
 897         ctx->pipe_index = 0;
 898         ctx->data_index = 0;
 899         ctx->data_half = 0;
 900
 901         /* neither the PC nor the data pointer are valid */
 902         ctx->pc_ok = 0;
 903         ctx->ptr_ok = 0;
 904
 905         while (ctx->pipe_index < ctx->trace_depth)
 906         {
 907                 uint8_t pipestat = ctx->trace_data[ctx->pipe_index].pipestat;
 908                 uint32_t next_pc = ctx->current_pc;
 909                 uint32_t old_data_index = ctx->data_index;
 910                 uint32_t old_data_half = ctx->data_half;
 911                 uint32_t old_index = ctx->pipe_index;
 912                 uint32_t last_instruction = ctx->last_instruction;
 913                 uint32_t cycles = 0;
 914                 int current_pc_ok = ctx->pc_ok;
 915
 916                 if (ctx->trace_data[ctx->pipe_index].flags & ETMV1_TRIGGER_CYCLE)
 917                 {
 918                         command_print(cmd_ctx, "--- trigger ---");
 919                 }
 920
 921                 /* instructions execute in IE/D or BE/D cycles */
 922                 if ((pipestat == STAT_IE) || (pipestat == STAT_ID))
 923                         ctx->last_instruction = ctx->pipe_index;
 924
 925                 /* if we don't have a valid pc skip until we reach an indirect branch */
 926                 if ((!ctx->pc_ok) && (pipestat != STAT_BE))
 927                 {
 928                         ctx->pipe_index++;
 929                         continue;
 930                 }
 931
 932                 /* any indirect branch could have interrupted instruction flow
 933                  * - the branch reason code could indicate a trace discontinuity
 934                  * - a branch to the exception vectors indicates an exception
 935                  */
 936                 if ((pipestat == STAT_BE) || (pipestat == STAT_BD))
 937                 {
 938                         /* backup current data index, to be able to consume the branch address
 939                          * before examining data address and values
 940                          */
 941                         old_data_index = ctx->data_index;
 942                         old_data_half = ctx->data_half;
 943
 944                         ctx->last_instruction = ctx->pipe_index;
 945
 946                         if ((retval = etmv1_branch_address(ctx)) != 0)
 947                         {
 948                                 /* negative return value from etmv1_branch_address means we ran out of packets,
 949                                  * quit analysing the trace */
 950                                 if (retval < 0)
 951                                         break;
 952
 953                                 /* a positive return values means the current branch was abandoned,
 954                                  * and a new branch was encountered in cycle ctx->pipe_index + retval;
 955                                  */
 956                                 LOG_WARNING("abandoned branch encountered, correctnes of analysis uncertain");
 957                                 ctx->pipe_index += retval;
 958                                 continue;
 959                         }
 960
 961                         /* skip over APO cycles */
 962                         ctx->pipe_index += 2;
 963
 964                         switch (ctx->last_branch_reason)
 965                         {
 966                                 case 0x0:       /* normal PC change */
 967                                         next_pc = ctx->last_branch;
 968                                         break;
 969                                 case 0x1:       /* tracing enabled */
 970                                         command_print(cmd_ctx, "--- tracing enabled at 0x%8.8" PRIx32 " ---", ctx->last_branch);
 971                                         ctx->current_pc = ctx->last_branch;
 972                                         ctx->pipe_index++;
 973                                         continue;
 974                                         break;
 975                                 case 0x2:       /* trace restarted after FIFO overflow */
 976                                         command_print(cmd_ctx, "--- trace restarted after FIFO overflow at 0x%8.8" PRIx32 " ---", ctx->last_branch);
 977                                         ctx->current_pc = ctx->last_branch;
 978                                         ctx->pipe_index++;
 979                                         continue;
 980                                         break;
 981                                 case 0x3:       /* exit from debug state */
 982                                         command_print(cmd_ctx, "--- exit from debug state at 0x%8.8" PRIx32 " ---", ctx->last_branch);
 983                                         ctx->current_pc = ctx->last_branch;
 984                                         ctx->pipe_index++;
 985                                         continue;
 986                                         break;
 987                                 case 0x4:       /* periodic synchronization point */
 988                                         next_pc = ctx->last_branch;
 989                                         /* if we had no valid PC prior to this synchronization point,
 990                                          * we have to move on with the next trace cycle
 991                                          */
 992                                         if (!current_pc_ok)
 993                                         {
 994                                                 command_print(cmd_ctx, "--- periodic synchronization point at 0x%8.8" PRIx32 " ---", next_pc);
 995                                                 ctx->current_pc = next_pc;
 996                                                 ctx->pipe_index++;
 997                                                 continue;
 998                                         }
 999                                         break;
1000                                 default:        /* reserved */
1001                                         LOG_ERROR("BUG: branch reason code 0x%" PRIx32 " is reserved", ctx->last_branch_reason);
1002                                         return ERROR_FAIL;
1003                         }
1004
1005                         /* if we got here the branch was a normal PC change
1006                          * (or a periodic synchronization point, which means the same for that matter)
1007                          * if we didn't accquire a complete PC continue with the next cycle
1008                          */
1009                         if (!ctx->pc_ok)
1010                                 continue;
1011
1012                         /* indirect branch to the exception vector means an exception occured */
1013                         if ((ctx->last_branch <= 0x20)
1014                                 || ((ctx->last_branch >= 0xffff0000) && (ctx->last_branch <= 0xffff0020)))
1015                         {
1016                                 if ((ctx->last_branch & 0xff) == 0x10)
1017                                 {
1018                                         command_print(cmd_ctx, "data abort");
1019                                 }
1020                                 else
1021                                 {
1022                                         command_print(cmd_ctx, "exception vector 0x%2.2" PRIx32 "", ctx->last_branch);
1023                                         ctx->current_pc = ctx->last_branch;
1024                                         ctx->pipe_index++;
1025                                         continue;
1026                                 }
1027                         }
1028                 }
1029
1030                 /* an instruction was executed (or not, depending on the condition flags)
1031                  * retrieve it from the image for displaying */
1032                 if (ctx->pc_ok && (pipestat != STAT_WT) && (pipestat != STAT_TD) &&
1033                         !(((pipestat == STAT_BE) || (pipestat == STAT_BD)) &&
1034                                 ((ctx->last_branch_reason != 0x0) && (ctx->last_branch_reason != 0x4))))
1035                 {
1036                         if ((retval = etm_read_instruction(ctx, &instruction)) != ERROR_OK)
1037                         {
1038                                 /* can't continue tracing with no image available */
1039                                 if (retval == ERROR_TRACE_IMAGE_UNAVAILABLE)
1040                                 {
1041                                         return retval;
1042                                 }
1043                                 else if (retval == ERROR_TRACE_INSTRUCTION_UNAVAILABLE)
1044                                 {
1045                                         /* TODO: handle incomplete images
1046                                          * for now we just quit the analsysis*/
1047                                         return retval;
1048                                 }
1049                         }
1050
1051                         cycles = old_index - last_instruction;
1052                 }
1053
1054                 if ((pipestat == STAT_ID) || (pipestat == STAT_BD))
1055                 {
1056                         uint32_t new_data_index = ctx->data_index;
1057                         uint32_t new_data_half = ctx->data_half;
1058
1059                         /* in case of a branch with data, the branch target address was consumed before
1060                          * we temporarily go back to the saved data index */
1061                         if (pipestat == STAT_BD)
1062                         {
1063                                 ctx->data_index = old_data_index;
1064                                 ctx->data_half = old_data_half;
1065                         }
1066
1067                         if (ctx->tracemode & ETMV1_TRACE_ADDR)
1068                         {
1069                                 uint8_t packet;
1070                                 int shift = 0;
1071
1072                                 do {
1073                                         if ((retval = etmv1_next_packet(ctx, &packet, 0)) != 0)
1074                                                 return ERROR_ETM_ANALYSIS_FAILED;
1075                                         ctx->last_ptr &= ~(0x7f << shift);
1076                                         ctx->last_ptr |= (packet & 0x7f) << shift;
1077                                         shift += 7;
1078                                 } while ((packet & 0x80) && (shift < 32));
1079
1080                                 if (shift >= 32)
1081                                         ctx->ptr_ok = 1;
1082
1083                                 if (ctx->ptr_ok)
1084                                 {
1085                                         command_print(cmd_ctx, "address: 0x%8.8" PRIx32 "", ctx->last_ptr);
1086                                 }
1087                         }
1088
1089                         if (ctx->tracemode & ETMV1_TRACE_DATA)
1090                         {
1091                                 if ((instruction.type == ARM_LDM) || (instruction.type == ARM_STM))
1092                                 {
1093                                         int i;
1094                                         for (i = 0; i < 16; i++)
1095                                         {
1096                                                 if (instruction.info.load_store_multiple.register_list & (1 << i))
1097                                                 {
1098                                                         uint32_t data;
1099                                                         if (etmv1_data(ctx, 4, &data) != 0)
1100                                                                 return ERROR_ETM_ANALYSIS_FAILED;
1101                                                         command_print(cmd_ctx, "data: 0x%8.8" PRIx32 "", data);
1102                                                 }
1103                                         }
1104                                 }
1105                                 else if ((instruction.type >= ARM_LDR) && (instruction.type <= ARM_STRH))
1106                                 {
1107                                         uint32_t data;
1108                                         if (etmv1_data(ctx, arm_access_size(&instruction), &data) != 0)
1109                                                 return ERROR_ETM_ANALYSIS_FAILED;
1110                                         command_print(cmd_ctx, "data: 0x%8.8" PRIx32 "", data);
1111                                 }
1112                         }
1113
1114                         /* restore data index after consuming BD address and data */
1115                         if (pipestat == STAT_BD)
1116                         {
1117                                 ctx->data_index = new_data_index;
1118                                 ctx->data_half = new_data_half;
1119                         }
1120                 }
1121
1122                 /* adjust PC */
1123                 if ((pipestat == STAT_IE) || (pipestat == STAT_ID))
1124                 {
1125                         if (((instruction.type == ARM_B) ||
1126                              (instruction.type == ARM_BL) ||
1127                              (instruction.type == ARM_BLX)) &&
1128                             (instruction.info.b_bl_bx_blx.target_address != 0xffffffff))
1129                         {
1130                                 next_pc = instruction.info.b_bl_bx_blx.target_address;
1131                         }
1132                         else
1133                         {
1134                                 next_pc += (ctx->core_state == ARMV4_5_STATE_ARM) ? 4 : 2;
1135                         }
1136                 }
1137                 else if (pipestat == STAT_IN)
1138                 {
1139                         next_pc += (ctx->core_state == ARMV4_5_STATE_ARM) ? 4 : 2;
1140                 }
1141
1142                 if ((pipestat != STAT_TD) && (pipestat != STAT_WT))
1143                 {
1144                         char cycles_text[32] = "";
1145
1146                         /* if the trace was captured with cycle accurate tracing enabled,
1147                          * output the number of cycles since the last executed instruction
1148                          */
1149                         if (ctx->tracemode & ETMV1_CYCLE_ACCURATE)
1150                         {
1151                                 snprintf(cycles_text, 32, " (%i %s)",
1152                                          (int)cycles,
1153                                         (cycles == 1) ? "cycle" : "cycles");
1154                         }
1155
1156                         command_print(cmd_ctx, "%s%s%s",
1157                                 instruction.text,
1158                                 (pipestat == STAT_IN) ? " (not executed)" : "",
1159                                 cycles_text);
1160
1161                         ctx->current_pc = next_pc;
1162
1163                         /* packets for an instruction don't start on or before the preceding
1164                          * functional pipestat (i.e. other than WT or TD)
1165                          */
1166                         if (ctx->data_index <= ctx->pipe_index)
1167                         {
1168                                 ctx->data_index = ctx->pipe_index + 1;
1169                                 ctx->data_half = 0;
1170                         }
1171                 }
1172
1173                 ctx->pipe_index += 1;
1174         }
1175
1176         return ERROR_OK;
1177 }
1178
1179 static int handle_etm_tracemode_command_update(
1180                 struct command_context_s *cmd_ctx,
1181                 char **args, etmv1_tracemode_t *mode)
1182 {
1183         etmv1_tracemode_t tracemode;
1184
1185         /* what parts of data access are traced? */
1186         if (strcmp(args[0], "none") == 0)
1187                 tracemode = ETMV1_TRACE_NONE;
1188         else if (strcmp(args[0], "data") == 0)
1189                 tracemode = ETMV1_TRACE_DATA;
1190         else if (strcmp(args[0], "address") == 0)
1191                 tracemode = ETMV1_TRACE_ADDR;
1192         else if (strcmp(args[0], "all") == 0)
1193                 tracemode = ETMV1_TRACE_DATA | ETMV1_TRACE_ADDR;
1194         else
1195         {
1196                 command_print(cmd_ctx, "invalid option '%s'", args[0]);
1197                 return ERROR_INVALID_ARGUMENTS;
1198         }
1199
1200         uint8_t context_id;
1201         COMMAND_PARSE_NUMBER(u8, args[1], context_id);
1202         switch (context_id)
1203         {
1204         case 0:
1205                 tracemode |= ETMV1_CONTEXTID_NONE;
1206                 break;
1207         case 8:
1208                 tracemode |= ETMV1_CONTEXTID_8;
1209                 break;
1210         case 16:
1211                 tracemode |= ETMV1_CONTEXTID_16;
1212                 break;
1213         case 32:
1214                 tracemode |= ETMV1_CONTEXTID_32;
1215                 break;
1216         default:
1217                 command_print(cmd_ctx, "invalid option '%s'", args[1]);
1218                 return ERROR_INVALID_ARGUMENTS;
1219         }
1220
1221         if (strcmp(args[2], "enable") == 0)
1222                 tracemode |= ETMV1_CYCLE_ACCURATE;
1223         else if (strcmp(args[2], "disable") == 0)
1224                 tracemode |= 0;
1225         else
1226         {
1227                 command_print(cmd_ctx, "invalid option '%s'", args[2]);
1228                 return ERROR_INVALID_ARGUMENTS;
1229         }
1230
1231         if (strcmp(args[3], "enable") == 0)
1232                 tracemode |= ETMV1_BRANCH_OUTPUT;
1233         else if (strcmp(args[3], "disable") == 0)
1234                 tracemode |= 0;
1235         else
1236         {
1237                 command_print(cmd_ctx, "invalid option '%s'", args[3]);
1238                 return ERROR_INVALID_ARGUMENTS;
1239         }
1240
1241         /* IGNORED:
1242          *  - CPRT tracing (coprocessor register transfers)
1243          *  - debug request (causes debug entry on trigger)
1244          *  - stall on FIFOFULL (preventing tracedata lossage)
1245          */
1246         *mode = tracemode;
1247
1248         return ERROR_OK;
1249 }
1250
1251 static int handle_etm_tracemode_command(struct command_context_s *cmd_ctx,
1252                 char *cmd, char **args, int argc)
1253 {
1254         target_t *target = get_current_target(cmd_ctx);
1255         struct arm *arm = target_to_arm(target);
1256         struct etm *etm;
1257
1258         if (!is_arm(arm)) {
1259                 command_print(cmd_ctx, "ETM: current target isn't an ARM");
1260                 return ERROR_FAIL;
1261         }
1262
1263         etm = arm->etm;
1264         if (!etm) {
1265                 command_print(cmd_ctx, "current target doesn't have an ETM configured");
1266                 return ERROR_FAIL;
1267         }
1268
1269         etmv1_tracemode_t tracemode = etm->tracemode;
1270
1271         switch (argc)
1272         {
1273         case 0:
1274                 break;
1275         case 4:
1276                 handle_etm_tracemode_command_update(cmd_ctx, args, &tracemode);
1277                 break;
1278         default:
1279                 command_print(cmd_ctx, "usage: configure trace mode "
1280                                 "<none | data | address | all> "
1281                                 "<context id bits> <cycle accurate> <branch output>");
1282                 return ERROR_FAIL;
1283         }
1284
1285         /**
1286          * todo: fail if parameters were invalid for this hardware,
1287          * or couldn't be written; display actual hardware state...
1288          */
1289
1290         command_print(cmd_ctx, "current tracemode configuration:");
1291
1292         switch (tracemode & ETMV1_TRACE_MASK)
1293         {
1294                 case ETMV1_TRACE_NONE:
1295                         command_print(cmd_ctx, "data tracing: none");
1296                         break;
1297                 case ETMV1_TRACE_DATA:
1298                         command_print(cmd_ctx, "data tracing: data only");
1299                         break;
1300                 case ETMV1_TRACE_ADDR:
1301                         command_print(cmd_ctx, "data tracing: address only");
1302                         break;
1303                 case ETMV1_TRACE_DATA | ETMV1_TRACE_ADDR:
1304                         command_print(cmd_ctx, "data tracing: address and data");
1305                         break;
1306         }
1307
1308         switch (tracemode & ETMV1_CONTEXTID_MASK)
1309         {
1310                 case ETMV1_CONTEXTID_NONE:
1311                         command_print(cmd_ctx, "contextid tracing: none");
1312                         break;
1313                 case ETMV1_CONTEXTID_8:
1314                         command_print(cmd_ctx, "contextid tracing: 8 bit");
1315                         break;
1316                 case ETMV1_CONTEXTID_16:
1317                         command_print(cmd_ctx, "contextid tracing: 16 bit");
1318                         break;
1319                 case ETMV1_CONTEXTID_32:
1320                         command_print(cmd_ctx, "contextid tracing: 32 bit");
1321                         break;
1322         }
1323
1324         if (tracemode & ETMV1_CYCLE_ACCURATE)
1325         {
1326                 command_print(cmd_ctx, "cycle-accurate tracing enabled");
1327         }
1328         else
1329         {
1330                 command_print(cmd_ctx, "cycle-accurate tracing disabled");
1331         }
1332
1333         if (tracemode & ETMV1_BRANCH_OUTPUT)
1334         {
1335                 command_print(cmd_ctx, "full branch address output enabled");
1336         }
1337         else
1338         {
1339                 command_print(cmd_ctx, "full branch address output disabled");
1340         }
1341
1342         /* only update ETM_CTRL register if tracemode changed */
1343         if (etm->tracemode != tracemode)
1344         {
1345                 reg_t *etm_ctrl_reg;
1346
1347                 etm_ctrl_reg = etm_reg_lookup(etm, ETM_CTRL);
1348                 if (!etm_ctrl_reg)
1349                         return ERROR_FAIL;
1350
1351                 etm_get_reg(etm_ctrl_reg);
1352
1353                 buf_set_u32(etm_ctrl_reg->value, 2, 2, tracemode & ETMV1_TRACE_MASK);
1354                 buf_set_u32(etm_ctrl_reg->value, 14, 2, (tracemode & ETMV1_CONTEXTID_MASK) >> 4);
1355                 buf_set_u32(etm_ctrl_reg->value, 12, 1, (tracemode & ETMV1_CYCLE_ACCURATE) >> 8);
1356                 buf_set_u32(etm_ctrl_reg->value, 8, 1, (tracemode & ETMV1_BRANCH_OUTPUT) >> 9);
1357                 etm_store_reg(etm_ctrl_reg);
1358
1359                 etm->tracemode = tracemode;
1360
1361                 /* invalidate old trace data */
1362                 etm->capture_status = TRACE_IDLE;
1363                 if (etm->trace_depth > 0)
1364                 {
1365                         free(etm->trace_data);
1366                         etm->trace_data = NULL;
1367                 }
1368                 etm->trace_depth = 0;
1369         }
1370
1371         return ERROR_OK;
1372 }
1373
1374 static int handle_etm_config_command(struct command_context_s *cmd_ctx,
1375                 char *cmd, char **args, int argc)
1376 {
1377         target_t *target;
1378         struct arm *arm;
1379         etm_portmode_t portmode = 0x0;
1380         struct etm *etm_ctx;
1381         int i;
1382
1383         if (argc != 5)
1384                 return ERROR_COMMAND_SYNTAX_ERROR;
1385
1386         target = get_target(args[0]);
1387         if (!target)
1388         {
1389                 LOG_ERROR("target '%s' not defined", args[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->cmd_name, target_get_name(target));
1397                 return ERROR_FAIL;
1398         }
1399
1400         /* FIXME for ETMv3.0 and above -- and we don't yet know what ETM
1401          * version we'll be using!! -- so we can't know how to validate
1402          * params yet.  "etm config" should likely be *AFTER* hookup...
1403          *
1404          *  - Many more widths might be supported ... and we can easily
1405          *    check whether our setting "took".
1406          *
1407          *  - The "clock" and "mode" bits are interpreted differently.
1408          *    See ARM IHI 0014O table 2-17 for the old behavior, and
1409          *    table 2-18 for the new.  With ETB it's best to specify
1410          *    "normal full" ...
1411          */
1412         uint8_t port_width;
1413         COMMAND_PARSE_NUMBER(u8, args[1], port_width);
1414         switch (port_width)
1415         {
1416                 /* before ETMv3.0 */
1417                 case 4:
1418                         portmode |= ETM_PORT_4BIT;
1419                         break;
1420                 case 8:
1421                         portmode |= ETM_PORT_8BIT;
1422                         break;
1423                 case 16:
1424                         portmode |= ETM_PORT_16BIT;
1425                         break;
1426                 /* ETMv3.0 and later*/
1427                 case 24:
1428                         portmode |= ETM_PORT_24BIT;
1429                         break;
1430                 case 32:
1431                         portmode |= ETM_PORT_32BIT;
1432                         break;
1433                 case 48:
1434                         portmode |= ETM_PORT_48BIT;
1435                         break;
1436                 case 64:
1437                         portmode |= ETM_PORT_64BIT;
1438                         break;
1439                 case 1:
1440                         portmode |= ETM_PORT_1BIT;
1441                         break;
1442                 case 2:
1443                         portmode |= ETM_PORT_2BIT;
1444                         break;
1445                 default:
1446                         command_print(cmd_ctx,
1447                                 "unsupported ETM port width '%s'", args[1]);
1448                         return ERROR_FAIL;
1449         }
1450
1451         if (strcmp("normal", args[2]) == 0)
1452         {
1453                 portmode |= ETM_PORT_NORMAL;
1454         }
1455         else if (strcmp("multiplexed", args[2]) == 0)
1456         {
1457                 portmode |= ETM_PORT_MUXED;
1458         }
1459         else if (strcmp("demultiplexed", args[2]) == 0)
1460         {
1461                 portmode |= ETM_PORT_DEMUXED;
1462         }
1463         else
1464         {
1465                 command_print(cmd_ctx, "unsupported ETM port mode '%s', must be 'normal', 'multiplexed' or 'demultiplexed'", args[2]);
1466                 return ERROR_FAIL;
1467         }
1468
1469         if (strcmp("half", args[3]) == 0)
1470         {
1471                 portmode |= ETM_PORT_HALF_CLOCK;
1472         }
1473         else if (strcmp("full", args[3]) == 0)
1474         {
1475                 portmode |= ETM_PORT_FULL_CLOCK;
1476         }
1477         else
1478         {
1479                 command_print(cmd_ctx, "unsupported ETM port clocking '%s', must be 'full' or 'half'", args[3]);
1480                 return ERROR_FAIL;
1481         }
1482
1483         etm_ctx = calloc(1, sizeof(etm_context_t));
1484         if (!etm_ctx) {
1485                 LOG_DEBUG("out of memory");
1486                 return ERROR_FAIL;
1487         }
1488
1489         for (i = 0; etm_capture_drivers[i]; i++)
1490         {
1491                 if (strcmp(args[4], etm_capture_drivers[i]->name) == 0)
1492                 {
1493                         int retval;
1494                         if ((retval = etm_capture_drivers[i]->register_commands(cmd_ctx)) != ERROR_OK)
1495                         {
1496                                 free(etm_ctx);
1497                                 return retval;
1498                         }
1499
1500                         etm_ctx->capture_driver = etm_capture_drivers[i];
1501
1502                         break;
1503                 }
1504         }
1505
1506         if (!etm_capture_drivers[i])
1507         {
1508                 /* no supported capture driver found, don't register an ETM */
1509                 free(etm_ctx);
1510                 LOG_ERROR("trace capture driver '%s' not found", args[4]);
1511                 return ERROR_FAIL;
1512         }
1513
1514         etm_ctx->target = target;
1515         etm_ctx->trigger_percent = 50;
1516         etm_ctx->trace_data = NULL;
1517         etm_ctx->portmode = portmode;
1518         etm_ctx->core_state = ARMV4_5_STATE_ARM;
1519
1520         arm->etm = etm_ctx;
1521
1522         return etm_register_user_commands(cmd_ctx);
1523 }
1524
1525 static int handle_etm_info_command(struct command_context_s *cmd_ctx,
1526                 char *cmd, char **args, int argc)
1527 {
1528         target_t *target;
1529         struct arm *arm;
1530         etm_context_t *etm;
1531         reg_t *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 static int handle_etm_status_command(struct command_context_s *cmd_ctx,
1659                 char *cmd, char **args, int argc)
1660 {
1661         target_t *target;
1662         struct arm *arm;
1663         etm_context_t *etm;
1664         trace_status_t trace_status;
1665
1666         target = get_current_target(cmd_ctx);
1667         arm = target_to_arm(target);
1668         if (!is_arm(arm))
1669         {
1670                 command_print(cmd_ctx, "ETM: current target isn't an ARM");
1671                 return ERROR_FAIL;
1672         }
1673
1674         etm = arm->etm;
1675         if (!etm)
1676         {
1677                 command_print(cmd_ctx, "current target doesn't have an ETM configured");
1678                 return ERROR_FAIL;
1679         }
1680
1681         /* ETM status */
1682         if (etm->bcd_vers >= 0x11) {
1683                 reg_t *reg;
1684
1685                 reg = etm_reg_lookup(etm, ETM_STATUS);
1686                 if (!reg)
1687                         return ERROR_FAIL;
1688                 if (etm_get_reg(reg) == ERROR_OK) {
1689                         unsigned s = buf_get_u32(reg->value, 0, reg->size);
1690
1691                         command_print(cmd_ctx, "etm: %s%s%s%s",
1692                                 /* bit(1) == progbit */
1693                                 (etm->bcd_vers >= 0x12)
1694                                         ? ((s & (1 << 1))
1695                                                 ? "disabled" : "enabled")
1696                                         : "?",
1697                                 ((s & (1 << 3)) && etm->bcd_vers >= 0x31)
1698                                         ? " triggered" : "",
1699                                 ((s & (1 << 2)) && etm->bcd_vers >= 0x12)
1700                                         ? " start/stop" : "",
1701                                 ((s & (1 << 0)) && etm->bcd_vers >= 0x11)
1702                                         ? " untraced-overflow" : "");
1703                 } /* else ignore and try showing trace port status */
1704         }
1705
1706         /* Trace Port Driver status */
1707         trace_status = etm->capture_driver->status(etm);
1708         if (trace_status == TRACE_IDLE)
1709         {
1710                 command_print(cmd_ctx, "%s: idle", etm->capture_driver->name);
1711         }
1712         else
1713         {
1714                 static char *completed = " completed";
1715                 static char *running = " is running";
1716                 static char *overflowed = ", overflowed";
1717                 static char *triggered = ", triggered";
1718
1719                 command_print(cmd_ctx, "%s: trace collection%s%s%s",
1720                         etm->capture_driver->name,
1721                         (trace_status & TRACE_RUNNING) ? running : completed,
1722                         (trace_status & TRACE_OVERFLOWED) ? overflowed : "",
1723                         (trace_status & TRACE_TRIGGERED) ? triggered : "");
1724
1725                 if (etm->trace_depth > 0)
1726                 {
1727                         command_print(cmd_ctx, "%i frames of trace data read",
1728                                         (int)(etm->trace_depth));
1729                 }
1730         }
1731
1732         return ERROR_OK;
1733 }
1734
1735 static int handle_etm_image_command(struct command_context_s *cmd_ctx,
1736                 char *cmd, char **args, int argc)
1737 {
1738         target_t *target;
1739         struct arm *arm;
1740         etm_context_t *etm_ctx;
1741
1742         if (argc < 1)
1743         {
1744                 command_print(cmd_ctx, "usage: etm image <file> [base address] [type]");
1745                 return ERROR_FAIL;
1746         }
1747
1748         target = get_current_target(cmd_ctx);
1749         arm = target_to_arm(target);
1750         if (!is_arm(arm))
1751         {
1752                 command_print(cmd_ctx, "ETM: current target isn't an ARM");
1753                 return ERROR_FAIL;
1754         }
1755
1756         etm_ctx = arm->etm;
1757         if (!etm_ctx)
1758         {
1759                 command_print(cmd_ctx, "current target doesn't have an ETM configured");
1760                 return ERROR_FAIL;
1761         }
1762
1763         if (etm_ctx->image)
1764         {
1765                 image_close(etm_ctx->image);
1766                 free(etm_ctx->image);
1767                 command_print(cmd_ctx, "previously loaded image found and closed");
1768         }
1769
1770         etm_ctx->image = malloc(sizeof(image_t));
1771         etm_ctx->image->base_address_set = 0;
1772         etm_ctx->image->start_address_set = 0;
1773
1774         /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
1775         if (argc >= 2)
1776         {
1777                 etm_ctx->image->base_address_set = 1;
1778                 COMMAND_PARSE_NUMBER(int, args[1], etm_ctx->image->base_address);
1779         }
1780         else
1781         {
1782                 etm_ctx->image->base_address_set = 0;
1783         }
1784
1785         if (image_open(etm_ctx->image, args[0], (argc >= 3) ? args[2] : NULL) != ERROR_OK)
1786         {
1787                 free(etm_ctx->image);
1788                 etm_ctx->image = NULL;
1789                 return ERROR_FAIL;
1790         }
1791
1792         return ERROR_OK;
1793 }
1794
1795 static int handle_etm_dump_command(struct command_context_s *cmd_ctx,
1796                 char *cmd, char **args, int argc)
1797 {
1798         fileio_t file;
1799         target_t *target;
1800         struct arm *arm;
1801         etm_context_t *etm_ctx;
1802         uint32_t i;
1803
1804         if (argc != 1)
1805         {
1806                 command_print(cmd_ctx, "usage: etm dump <file>");
1807                 return ERROR_FAIL;
1808         }
1809
1810         target = get_current_target(cmd_ctx);
1811         arm = target_to_arm(target);
1812         if (!is_arm(arm))
1813         {
1814                 command_print(cmd_ctx, "ETM: current target isn't an ARM");
1815                 return ERROR_FAIL;
1816         }
1817
1818         etm_ctx = arm->etm;
1819         if (!etm_ctx)
1820         {
1821                 command_print(cmd_ctx, "current target doesn't have an ETM configured");
1822                 return ERROR_FAIL;
1823         }
1824
1825         if (etm_ctx->capture_driver->status == TRACE_IDLE)
1826         {
1827                 command_print(cmd_ctx, "trace capture wasn't enabled, no trace data captured");
1828                 return ERROR_OK;
1829         }
1830
1831         if (etm_ctx->capture_driver->status(etm_ctx) & TRACE_RUNNING)
1832         {
1833                 /* TODO: if on-the-fly capture is to be supported, this needs to be changed */
1834                 command_print(cmd_ctx, "trace capture not completed");
1835                 return ERROR_FAIL;
1836         }
1837
1838         /* read the trace data if it wasn't read already */
1839         if (etm_ctx->trace_depth == 0)
1840                 etm_ctx->capture_driver->read_trace(etm_ctx);
1841
1842         if (fileio_open(&file, args[0], FILEIO_WRITE, FILEIO_BINARY) != ERROR_OK)
1843         {
1844                 return ERROR_FAIL;
1845         }
1846
1847         fileio_write_u32(&file, etm_ctx->capture_status);
1848         fileio_write_u32(&file, etm_ctx->portmode);
1849         fileio_write_u32(&file, etm_ctx->tracemode);
1850         fileio_write_u32(&file, etm_ctx->trace_depth);
1851
1852         for (i = 0; i < etm_ctx->trace_depth; i++)
1853         {
1854                 fileio_write_u32(&file, etm_ctx->trace_data[i].pipestat);
1855                 fileio_write_u32(&file, etm_ctx->trace_data[i].packet);
1856                 fileio_write_u32(&file, etm_ctx->trace_data[i].flags);
1857         }
1858
1859         fileio_close(&file);
1860
1861         return ERROR_OK;
1862 }
1863
1864 static int handle_etm_load_command(struct command_context_s *cmd_ctx,
1865                 char *cmd, char **args, int argc)
1866 {
1867         fileio_t file;
1868         target_t *target;
1869         struct arm *arm;
1870         etm_context_t *etm_ctx;
1871         uint32_t i;
1872
1873         if (argc != 1)
1874         {
1875                 command_print(cmd_ctx, "usage: etm load <file>");
1876                 return ERROR_FAIL;
1877         }
1878
1879         target = get_current_target(cmd_ctx);
1880         arm = target_to_arm(target);
1881         if (!is_arm(arm))
1882         {
1883                 command_print(cmd_ctx, "ETM: current target isn't an ARM");
1884                 return ERROR_FAIL;
1885         }
1886
1887         etm_ctx = arm->etm;
1888         if (!etm_ctx)
1889         {
1890                 command_print(cmd_ctx, "current target doesn't have an ETM configured");
1891                 return ERROR_FAIL;
1892         }
1893
1894         if (etm_ctx->capture_driver->status(etm_ctx) & TRACE_RUNNING)
1895         {
1896                 command_print(cmd_ctx, "trace capture running, stop first");
1897                 return ERROR_FAIL;
1898         }
1899
1900         if (fileio_open(&file, args[0], FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
1901         {
1902                 return ERROR_FAIL;
1903         }
1904
1905         if (file.size % 4)
1906         {
1907                 command_print(cmd_ctx, "size isn't a multiple of 4, no valid trace data");
1908                 fileio_close(&file);
1909                 return ERROR_FAIL;
1910         }
1911
1912         if (etm_ctx->trace_depth > 0)
1913         {
1914                 free(etm_ctx->trace_data);
1915                 etm_ctx->trace_data = NULL;
1916         }
1917
1918         {
1919           uint32_t tmp;
1920           fileio_read_u32(&file, &tmp); etm_ctx->capture_status = tmp;
1921           fileio_read_u32(&file, &tmp); etm_ctx->portmode = tmp;
1922           fileio_read_u32(&file, &tmp); etm_ctx->tracemode = tmp;
1923           fileio_read_u32(&file, &etm_ctx->trace_depth);
1924         }
1925         etm_ctx->trace_data = malloc(sizeof(etmv1_trace_data_t) * etm_ctx->trace_depth);
1926         if (etm_ctx->trace_data == NULL)
1927         {
1928                 command_print(cmd_ctx, "not enough memory to perform operation");
1929                 fileio_close(&file);
1930                 return ERROR_FAIL;
1931         }
1932
1933         for (i = 0; i < etm_ctx->trace_depth; i++)
1934         {
1935                 uint32_t pipestat, packet, flags;
1936                 fileio_read_u32(&file, &pipestat);
1937                 fileio_read_u32(&file, &packet);
1938                 fileio_read_u32(&file, &flags);
1939                 etm_ctx->trace_data[i].pipestat = pipestat & 0xff;
1940                 etm_ctx->trace_data[i].packet = packet & 0xffff;
1941                 etm_ctx->trace_data[i].flags = flags;
1942         }
1943
1944         fileio_close(&file);
1945
1946         return ERROR_OK;
1947 }
1948
1949 static int handle_etm_trigger_percent_command(struct command_context_s *cmd_ctx,
1950                 char *cmd, char **args, int argc)
1951 {
1952         target_t *target;
1953         struct arm *arm;
1954         etm_context_t *etm_ctx;
1955
1956         target = get_current_target(cmd_ctx);
1957         arm = target_to_arm(target);
1958         if (!is_arm(arm))
1959         {
1960                 command_print(cmd_ctx, "ETM: current target isn't an ARM");
1961                 return ERROR_FAIL;
1962         }
1963
1964         etm_ctx = arm->etm;
1965         if (!etm_ctx)
1966         {
1967                 command_print(cmd_ctx, "current target doesn't have an ETM configured");
1968                 return ERROR_FAIL;
1969         }
1970
1971         if (argc > 0)
1972         {
1973                 uint32_t new_value;
1974                 COMMAND_PARSE_NUMBER(u32, args[0], new_value);
1975
1976                 if ((new_value < 2) || (new_value > 100))
1977                 {
1978                         command_print(cmd_ctx, "valid settings are 2%% to 100%%");
1979                 }
1980                 else
1981                 {
1982                         etm_ctx->trigger_percent = new_value;
1983                 }
1984         }
1985
1986         command_print(cmd_ctx, "%i percent of the tracebuffer reserved for after the trigger", ((int)(etm_ctx->trigger_percent)));
1987
1988         return ERROR_OK;
1989 }
1990
1991 static int handle_etm_start_command(struct command_context_s *cmd_ctx,
1992                 char *cmd, char **args, int argc)
1993 {
1994         target_t *target;
1995         struct arm *arm;
1996         etm_context_t *etm_ctx;
1997         reg_t *etm_ctrl_reg;
1998
1999         target = get_current_target(cmd_ctx);
2000         arm = target_to_arm(target);
2001         if (!is_arm(arm))
2002         {
2003                 command_print(cmd_ctx, "ETM: current target isn't an ARM");
2004                 return ERROR_FAIL;
2005         }
2006
2007         etm_ctx = arm->etm;
2008         if (!etm_ctx)
2009         {
2010                 command_print(cmd_ctx, "current target doesn't have an ETM configured");
2011                 return ERROR_FAIL;
2012         }
2013
2014         /* invalidate old tracing data */
2015         etm_ctx->capture_status = TRACE_IDLE;
2016         if (etm_ctx->trace_depth > 0)
2017         {
2018                 free(etm_ctx->trace_data);
2019                 etm_ctx->trace_data = NULL;
2020         }
2021         etm_ctx->trace_depth = 0;
2022
2023         etm_ctrl_reg = etm_reg_lookup(etm_ctx, ETM_CTRL);
2024         if (!etm_ctrl_reg)
2025                 return ERROR_FAIL;
2026
2027         etm_get_reg(etm_ctrl_reg);
2028
2029         /* Clear programming bit (10), set port selection bit (11) */
2030         buf_set_u32(etm_ctrl_reg->value, 10, 2, 0x2);
2031
2032         etm_store_reg(etm_ctrl_reg);
2033         jtag_execute_queue();
2034
2035         etm_ctx->capture_driver->start_capture(etm_ctx);
2036
2037         return ERROR_OK;
2038 }
2039
2040 static int handle_etm_stop_command(struct command_context_s *cmd_ctx,
2041                 char *cmd, char **args, int argc)
2042 {
2043         target_t *target;
2044         struct arm *arm;
2045         etm_context_t *etm_ctx;
2046         reg_t *etm_ctrl_reg;
2047
2048         target = get_current_target(cmd_ctx);
2049         arm = target_to_arm(target);
2050         if (!is_arm(arm))
2051         {
2052                 command_print(cmd_ctx, "ETM: current target isn't an ARM");
2053                 return ERROR_FAIL;
2054         }
2055
2056         etm_ctx = arm->etm;
2057         if (!etm_ctx)
2058         {
2059                 command_print(cmd_ctx, "current target doesn't have an ETM configured");
2060                 return ERROR_FAIL;
2061         }
2062
2063         etm_ctrl_reg = etm_reg_lookup(etm_ctx, ETM_CTRL);
2064         if (!etm_ctrl_reg)
2065                 return ERROR_FAIL;
2066
2067         etm_get_reg(etm_ctrl_reg);
2068
2069         /* Set programming bit (10), clear port selection bit (11) */
2070         buf_set_u32(etm_ctrl_reg->value, 10, 2, 0x1);
2071
2072         etm_store_reg(etm_ctrl_reg);
2073         jtag_execute_queue();
2074
2075         etm_ctx->capture_driver->stop_capture(etm_ctx);
2076
2077         return ERROR_OK;
2078 }
2079
2080 static int handle_etm_analyze_command(struct command_context_s *cmd_ctx,
2081                 char *cmd, char **args, int argc)
2082 {
2083         target_t *target;
2084         struct arm *arm;
2085         etm_context_t *etm_ctx;
2086         int retval;
2087
2088         target = get_current_target(cmd_ctx);
2089         arm = target_to_arm(target);
2090         if (!is_arm(arm))
2091         {
2092                 command_print(cmd_ctx, "ETM: current target isn't an ARM");
2093                 return ERROR_FAIL;
2094         }
2095
2096         etm_ctx = arm->etm;
2097         if (!etm_ctx)
2098         {
2099                 command_print(cmd_ctx, "current target doesn't have an ETM configured");
2100                 return ERROR_FAIL;
2101         }
2102
2103         if ((retval = etmv1_analyze_trace(etm_ctx, cmd_ctx)) != ERROR_OK)
2104         {
2105                 switch (retval)
2106                 {
2107                         case ERROR_ETM_ANALYSIS_FAILED:
2108                                 command_print(cmd_ctx, "further analysis failed (corrupted trace data or just end of data");
2109                                 break;
2110                         case ERROR_TRACE_INSTRUCTION_UNAVAILABLE:
2111                                 command_print(cmd_ctx, "no instruction for current address available, analysis aborted");
2112                                 break;
2113                         case ERROR_TRACE_IMAGE_UNAVAILABLE:
2114                                 command_print(cmd_ctx, "no image available for trace analysis");
2115                                 break;
2116                         default:
2117                                 command_print(cmd_ctx, "unknown error: %i", retval);
2118                 }
2119         }
2120
2121         return retval;
2122 }
2123
2124 int etm_register_commands(struct command_context_s *cmd_ctx)
2125 {
2126         etm_cmd = register_command(cmd_ctx, NULL, "etm", NULL, COMMAND_ANY, "Embedded Trace Macrocell");
2127
2128         register_command(cmd_ctx, etm_cmd, "config", handle_etm_config_command,
2129                 COMMAND_CONFIG, "etm config <target> <port_width> <port_mode> <clocking> <capture_driver>");
2130
2131         return ERROR_OK;
2132 }
2133
2134 static int etm_register_user_commands(struct command_context_s *cmd_ctx)
2135 {
2136         register_command(cmd_ctx, etm_cmd, "tracemode", handle_etm_tracemode_command,
2137                 COMMAND_EXEC, "configure/display trace mode: "
2138                         "<none | data | address | all> "
2139                         "<context_id_bits> <cycle_accurate> <branch_output>");
2140
2141         register_command(cmd_ctx, etm_cmd, "info", handle_etm_info_command,
2142                 COMMAND_EXEC, "display info about the current target's ETM");
2143
2144         register_command(cmd_ctx, etm_cmd, "trigger_percent", handle_etm_trigger_percent_command,
2145                 COMMAND_EXEC, "amount (<percent>) of trace buffer to be filled after the trigger occured");
2146         register_command(cmd_ctx, etm_cmd, "status", handle_etm_status_command,
2147                 COMMAND_EXEC, "display current target's ETM status");
2148         register_command(cmd_ctx, etm_cmd, "start", handle_etm_start_command,
2149                 COMMAND_EXEC, "start ETM trace collection");
2150         register_command(cmd_ctx, etm_cmd, "stop", handle_etm_stop_command,
2151                 COMMAND_EXEC, "stop ETM trace collection");
2152
2153         register_command(cmd_ctx, etm_cmd, "analyze", handle_etm_analyze_command,
2154                 COMMAND_EXEC, "anaylze collected ETM trace");
2155
2156         register_command(cmd_ctx, etm_cmd, "image", handle_etm_image_command,
2157                 COMMAND_EXEC, "load image from <file> [base address]");
2158
2159         register_command(cmd_ctx, etm_cmd, "dump", handle_etm_dump_command,
2160                 COMMAND_EXEC, "dump captured trace data <file>");
2161         register_command(cmd_ctx, etm_cmd, "load", handle_etm_load_command,
2162                 COMMAND_EXEC, "load trace data for analysis <file>");
2163
2164         return ERROR_OK;
2165 }