git.gag.com Git - fw/openocd/blob - src/target/embeddedice.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008,2009 Øyvind Harboe                            *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program; if not, write to the                         *
  23  *   Free Software Foundation, Inc.,                                       *
  24  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  25  ***************************************************************************/
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include "embeddedice.h"
  31 #include "register.h"
  32
  33 /**
  34  * @file
  35  *
  36  * This provides lowlevel glue to the EmbeddedICE (or EmbeddedICE-RT)
  37  * module found on scan chain 2 in ARM7, ARM9, and some other families
  38  * of ARM cores.  The module is called "EmbeddedICE-RT" if it has
  39  * monitor mode support.
  40  *
  41  * EmbeddedICE provides basic watchpoint/breakpoint hardware and a Debug
  42  * Communications Channel (DCC) used to read or write 32-bit words to
  43  * OpenOCD-aware code running on the target CPU.
  44  * Newer modules also include vector catch hardware.  Some versions
  45  * support hardware single-stepping, "monitor mode" debug (which is not
  46  * currently supported by OpenOCD), or extended reporting on why the
  47  * core entered debug mode.
  48  */
  49
  50 /*
  51  * From:  ARM9E-S TRM, DDI 0165, table C-4 (and similar, for other cores)
  52  */
  53 static const struct {
  54         char            *name;
  55         unsigned short  addr;
  56         unsigned short  width;
  57 } eice_regs[] = {
  58         [EICE_DBG_CTRL] = {
  59                 .name =         "debug_ctrl",
  60                 .addr =         0,
  61                 /* width is assigned based on EICE version */
  62         },
  63         [EICE_DBG_STAT] = {
  64                 .name =         "debug_status",
  65                 .addr =         1,
  66                 /* width is assigned based on EICE version */
  67         },
  68         [EICE_COMMS_CTRL] = {
  69                 .name =         "comms_ctrl",
  70                 .addr =         4,
  71                 .width =        6,
  72         },
  73         [EICE_COMMS_DATA] = {
  74                 .name =         "comms_data",
  75                 .addr =         5,
  76                 .width =        32,
  77         },
  78         [EICE_W0_ADDR_VALUE] = {
  79                 .name =         "watch_0_addr_value",
  80                 .addr =         8,
  81                 .width =        32,
  82         },
  83         [EICE_W0_ADDR_MASK] = {
  84                 .name =         "watch_0_addr_mask",
  85                 .addr =         9,
  86                 .width =        32,
  87         },
  88         [EICE_W0_DATA_VALUE ] = {
  89                 .name =         "watch_0_data_value",
  90                 .addr =         10,
  91                 .width =        32,
  92         },
  93         [EICE_W0_DATA_MASK] = {
  94                 .name =         "watch_0_data_mask",
  95                 .addr =         11,
  96                 .width =        32,
  97         },
  98         [EICE_W0_CONTROL_VALUE] = {
  99                 .name =         "watch_0_control_value",
 100                 .addr =         12,
 101                 .width =        9,
 102         },
 103         [EICE_W0_CONTROL_MASK] = {
 104                 .name =         "watch_0_control_mask",
 105                 .addr =         13,
 106                 .width =        8,
 107         },
 108         [EICE_W1_ADDR_VALUE] = {
 109                 .name =         "watch_1_addr_value",
 110                 .addr =         16,
 111                 .width =        32,
 112         },
 113         [EICE_W1_ADDR_MASK] = {
 114                 .name =         "watch_1_addr_mask",
 115                 .addr =         17,
 116                 .width =        32,
 117         },
 118         [EICE_W1_DATA_VALUE] = {
 119                 .name =         "watch_1_data_value",
 120                 .addr =         18,
 121                 .width =        32,
 122         },
 123         [EICE_W1_DATA_MASK] = {
 124                 .name =         "watch_1_data_mask",
 125                 .addr =         19,
 126                 .width =        32,
 127         },
 128         [EICE_W1_CONTROL_VALUE] = {
 129                 .name =         "watch_1_control_value",
 130                 .addr =         20,
 131                 .width =        9,
 132         },
 133         [EICE_W1_CONTROL_MASK] = {
 134                 .name =         "watch_1_control_mask",
 135                 .addr =         21,
 136                 .width =        8,
 137         },
 138         /* vector_catch isn't always present */
 139         [EICE_VEC_CATCH] = {
 140                 .name =         "vector_catch",
 141                 .addr =         2,
 142                 .width =        8,
 143         },
 144 };
 145
 146
 147 static int embeddedice_get_reg(struct reg *reg)
 148 {
 149         int retval;
 150
 151         if ((retval = embeddedice_read_reg(reg)) != ERROR_OK)
 152                 LOG_ERROR("error queueing EmbeddedICE register read");
 153         else if ((retval = jtag_execute_queue()) != ERROR_OK)
 154                 LOG_ERROR("EmbeddedICE register read failed");
 155
 156         return retval;
 157 }
 158
 159 static const struct reg_arch_type eice_reg_type = {
 160         .get = embeddedice_get_reg,
 161         .set = embeddedice_set_reg_w_exec,
 162 };
 163
 164 /**
 165  * Probe EmbeddedICE module and set up local records of its registers.
 166  * Different versions of the modules have different capabilities, such as
 167  * hardware support for vector_catch, single stepping, and monitor mode.
 168  */
 169 struct reg_cache *
 170 embeddedice_build_reg_cache(struct target *target, struct arm7_9_common *arm7_9)
 171 {
 172         int retval;
 173         struct reg_cache *reg_cache = malloc(sizeof(struct reg_cache));
 174         struct reg *reg_list = NULL;
 175         struct embeddedice_reg *arch_info = NULL;
 176         struct arm_jtag *jtag_info = &arm7_9->jtag_info;
 177         int num_regs = ARRAY_SIZE(eice_regs);
 178         int i;
 179         int eice_version = 0;
 180
 181         /* vector_catch isn't always present */
 182         if (!arm7_9->has_vector_catch)
 183                 num_regs--;
 184
 185         /* the actual registers are kept in two arrays */
 186         reg_list = calloc(num_regs, sizeof(struct reg));
 187         arch_info = calloc(num_regs, sizeof(struct embeddedice_reg));
 188
 189         /* fill in values for the reg cache */
 190         reg_cache->name = "EmbeddedICE registers";
 191         reg_cache->next = NULL;
 192         reg_cache->reg_list = reg_list;
 193         reg_cache->num_regs = num_regs;
 194
 195         /* FIXME the second watchpoint unit on Feroceon and Dragonite
 196          * seems not to work ... we should have a way to not set up
 197          * its four registers here!
 198          */
 199
 200         /* set up registers */
 201         for (i = 0; i < num_regs; i++)
 202         {
 203                 reg_list[i].name = eice_regs[i].name;
 204                 reg_list[i].size = eice_regs[i].width;
 205                 reg_list[i].dirty = 0;
 206                 reg_list[i].valid = 0;
 207                 reg_list[i].value = calloc(1, 4);
 208                 reg_list[i].arch_info = &arch_info[i];
 209                 reg_list[i].type = &eice_reg_type;
 210                 arch_info[i].addr = eice_regs[i].addr;
 211                 arch_info[i].jtag_info = jtag_info;
 212         }
 213
 214         /* identify EmbeddedICE version by reading DCC control register */
 215         embeddedice_read_reg(&reg_list[EICE_COMMS_CTRL]);
 216         if ((retval = jtag_execute_queue()) != ERROR_OK)
 217         {
 218                 for (i = 0; i < num_regs; i++)
 219                 {
 220                         free(reg_list[i].value);
 221                 }
 222                 free(reg_list);
 223                 free(reg_cache);
 224                 free(arch_info);
 225                 return NULL;
 226         }
 227
 228         eice_version = buf_get_u32(reg_list[EICE_COMMS_CTRL].value, 28, 4);
 229         LOG_INFO("Embedded ICE version %d", eice_version);
 230
 231         switch (eice_version)
 232         {
 233                 case 1:
 234                         /* ARM7TDMI r3, ARM7TDMI-S r3
 235                          *
 236                          * REVISIT docs say ARM7TDMI-S r4 uses version 1 but
 237                          * that it has 6-bit CTRL and 5-bit STAT... doc bug?
 238                          * ARM7TDMI r4 docs say EICE v4.
 239                          */
 240                         reg_list[EICE_DBG_CTRL].size = 3;
 241                         reg_list[EICE_DBG_STAT].size = 5;
 242                         break;
 243                 case 2:
 244                         /* ARM9TDMI */
 245                         reg_list[EICE_DBG_CTRL].size = 4;
 246                         reg_list[EICE_DBG_STAT].size = 5;
 247                         arm7_9->has_single_step = 1;
 248                         break;
 249                 case 3:
 250                         LOG_ERROR("EmbeddedICE v%d handling might be broken",
 251                                         eice_version);
 252                         reg_list[EICE_DBG_CTRL].size = 6;
 253                         reg_list[EICE_DBG_STAT].size = 5;
 254                         arm7_9->has_single_step = 1;
 255                         arm7_9->has_monitor_mode = 1;
 256                         break;
 257                 case 4:
 258                         /* ARM7TDMI r4 */
 259                         reg_list[EICE_DBG_CTRL].size = 6;
 260                         reg_list[EICE_DBG_STAT].size = 5;
 261                         arm7_9->has_monitor_mode = 1;
 262                         break;
 263                 case 5:
 264                         /* ARM9E-S rev 1 */
 265                         reg_list[EICE_DBG_CTRL].size = 6;
 266                         reg_list[EICE_DBG_STAT].size = 5;
 267                         arm7_9->has_single_step = 1;
 268                         arm7_9->has_monitor_mode = 1;
 269                         break;
 270                 case 6:
 271                         /* ARM7EJ-S, ARM9E-S rev 2, ARM9EJ-S */
 272                         reg_list[EICE_DBG_CTRL].size = 6;
 273                         reg_list[EICE_DBG_STAT].size = 10;
 274                         /* DBG_STAT has MOE bits */
 275                         arm7_9->has_monitor_mode = 1;
 276                         break;
 277                 case 7:
 278                         LOG_ERROR("EmbeddedICE v%d handling might be broken",
 279                                         eice_version);
 280                         reg_list[EICE_DBG_CTRL].size = 6;
 281                         reg_list[EICE_DBG_STAT].size = 5;
 282                         arm7_9->has_monitor_mode = 1;
 283                         break;
 284                 default:
 285                         /*
 286                          * The Feroceon implementation has the version number
 287                          * in some unusual bits.  Let feroceon.c validate it
 288                          * and do the appropriate setup itself.
 289                          */
 290                         if (strcmp(target_type_name(target), "feroceon") == 0 ||
 291                             strcmp(target_type_name(target), "dragonite") == 0)
 292                                 break;
 293                         LOG_ERROR("unknown EmbeddedICE version "
 294                                 "(comms ctrl: 0x%8.8" PRIx32 ")",
 295                                 buf_get_u32(reg_list[EICE_COMMS_CTRL].value, 0, 32));
 296         }
 297
 298         /* On Feroceon and Dragonite the second unit is seemingly missing. */
 299         LOG_INFO("%s: hardware has %d breakpoint/watchpoint unit%s",
 300                         target_name(target), arm7_9->wp_available_max,
 301                         (arm7_9->wp_available_max != 1) ? "s" : "");
 302
 303         return reg_cache;
 304 }
 305
 306 /**
 307  * Initialize EmbeddedICE module, if needed.
 308  */
 309 int embeddedice_setup(struct target *target)
 310 {
 311         int retval;
 312         struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
 313
 314         /* Explicitly disable monitor mode.  For now we only support halting
 315          * debug ... we don't know how to talk with a resident debug monitor
 316          * that manages break requests.  ARM's "Angel Debug Monitor" is one
 317          * common example of such code.
 318          */
 319         if (arm7_9->has_monitor_mode)
 320         {
 321                 struct reg *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
 322
 323                 embeddedice_read_reg(dbg_ctrl);
 324                 if ((retval = jtag_execute_queue()) != ERROR_OK)
 325                         return retval;
 326                 buf_set_u32(dbg_ctrl->value, 4, 1, 0);
 327                 embeddedice_set_reg_w_exec(dbg_ctrl, dbg_ctrl->value);
 328         }
 329         return jtag_execute_queue();
 330 }
 331
 332 /**
 333  * Queue a read for an EmbeddedICE register into the register cache,
 334  * optionally checking the value read.
 335  * Note that at this level, all registers are 32 bits wide.
 336  */
 337 int embeddedice_read_reg_w_check(struct reg *reg,
 338                 uint8_t *check_value, uint8_t *check_mask)
 339 {
 340         struct embeddedice_reg *ice_reg = reg->arch_info;
 341         uint8_t reg_addr = ice_reg->addr & 0x1f;
 342         struct scan_field fields[3];
 343         uint8_t field1_out[1];
 344         uint8_t field2_out[1];
 345
 346         jtag_set_end_state(TAP_IDLE);
 347         arm_jtag_scann(ice_reg->jtag_info, 0x2);
 348
 349         arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr, NULL);
 350
 351         /* bits 31:0 -- data (ignored here) */
 352         fields[0].tap = ice_reg->jtag_info->tap;
 353         fields[0].num_bits = 32;
 354         fields[0].out_value = reg->value;
 355         fields[0].in_value = NULL;
 356         fields[0].check_value = NULL;
 357         fields[0].check_mask = NULL;
 358
 359         /* bits 36:32 -- register */
 360         fields[1].tap = ice_reg->jtag_info->tap;
 361         fields[1].num_bits = 5;
 362         fields[1].out_value = field1_out;
 363         fields[1].out_value[0] = reg_addr;
 364         fields[1].in_value = NULL;
 365         fields[1].check_value = NULL;
 366         fields[1].check_mask = NULL;
 367
 368         /* bit 37 -- 0/read */
 369         fields[2].tap = ice_reg->jtag_info->tap;
 370         fields[2].num_bits = 1;
 371         fields[2].out_value = field2_out;
 372         fields[2].out_value[0] = 0;
 373         fields[2].in_value = NULL;
 374         fields[2].check_value = NULL;
 375         fields[2].check_mask = NULL;
 376
 377         /* traverse Update-DR, setting address for the next read */
 378         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 379
 380         /* bits 31:0 -- the data we're reading (and maybe checking) */
 381         fields[0].in_value = reg->value;
 382         fields[0].check_value = check_value;
 383         fields[0].check_mask = check_mask;
 384
 385         /* when reading the DCC data register, leaving the address field set to
 386          * EICE_COMMS_DATA would read the register twice
 387          * reading the control register is safe
 388          */
 389         fields[1].out_value[0] = eice_regs[EICE_COMMS_CTRL].addr;
 390
 391         /* traverse Update-DR, reading but with no other side effects */
 392         jtag_add_dr_scan_check(3, fields, jtag_get_end_state());
 393
 394         return ERROR_OK;
 395 }
 396
 397 /**
 398  * Receive a block of size 32-bit words from the DCC.
 399  * We assume the target is always going to be fast enough (relative to
 400  * the JTAG clock) that the debugger won't need to poll the handshake
 401  * bit.  The JTAG clock is usually at least six times slower than the
 402  * functional clock, so the 50+ JTAG clocks needed to receive the word
 403  * allow hundreds of instruction cycles (per word) in the target.
 404  */
 405 int embeddedice_receive(struct arm_jtag *jtag_info, uint32_t *data, uint32_t size)
 406 {
 407         struct scan_field fields[3];
 408         uint8_t field1_out[1];
 409         uint8_t field2_out[1];
 410
 411         jtag_set_end_state(TAP_IDLE);
 412         arm_jtag_scann(jtag_info, 0x2);
 413         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 414
 415         fields[0].tap = jtag_info->tap;
 416         fields[0].num_bits = 32;
 417         fields[0].out_value = NULL;
 418         fields[0].in_value = NULL;
 419
 420         fields[1].tap = jtag_info->tap;
 421         fields[1].num_bits = 5;
 422         fields[1].out_value = field1_out;
 423         fields[1].out_value[0] = eice_regs[EICE_COMMS_DATA].addr;
 424         fields[1].in_value = NULL;
 425
 426         fields[2].tap = jtag_info->tap;
 427         fields[2].num_bits = 1;
 428         fields[2].out_value = field2_out;
 429         fields[2].out_value[0] = 0;
 430         fields[2].in_value = NULL;
 431
 432         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 433
 434         while (size > 0)
 435         {
 436                 /* when reading the last item, set the register address to the DCC control reg,
 437                  * to avoid reading additional data from the DCC data reg
 438                  */
 439                 if (size == 1)
 440                         fields[1].out_value[0] = eice_regs[EICE_COMMS_CTRL].addr;
 441
 442                 fields[0].in_value = (uint8_t *)data;
 443                 jtag_add_dr_scan(3, fields, jtag_get_end_state());
 444                 jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)data);
 445
 446                 data++;
 447                 size--;
 448         }
 449
 450         return jtag_execute_queue();
 451 }
 452
 453 /**
 454  * Queue a read for an EmbeddedICE register into the register cache,
 455  * not checking the value read.
 456  */
 457 int embeddedice_read_reg(struct reg *reg)
 458 {
 459         return embeddedice_read_reg_w_check(reg, NULL, NULL);
 460 }
 461
 462 /**
 463  * Queue a write for an EmbeddedICE register, updating the register cache.
 464  * Uses embeddedice_write_reg().
 465  */
 466 void embeddedice_set_reg(struct reg *reg, uint32_t value)
 467 {
 468         embeddedice_write_reg(reg, value);
 469
 470         buf_set_u32(reg->value, 0, reg->size, value);
 471         reg->valid = 1;
 472         reg->dirty = 0;
 473
 474 }
 475
 476 /**
 477  * Write an EmbeddedICE register, updating the register cache.
 478  * Uses embeddedice_set_reg(); not queued.
 479  */
 480 int embeddedice_set_reg_w_exec(struct reg *reg, uint8_t *buf)
 481 {
 482         int retval;
 483
 484         embeddedice_set_reg(reg, buf_get_u32(buf, 0, reg->size));
 485         if ((retval = jtag_execute_queue()) != ERROR_OK)
 486                 LOG_ERROR("register write failed");
 487         return retval;
 488 }
 489
 490 /**
 491  * Queue a write for an EmbeddedICE register, bypassing the register cache.
 492  */
 493 void embeddedice_write_reg(struct reg *reg, uint32_t value)
 494 {
 495         struct embeddedice_reg *ice_reg = reg->arch_info;
 496
 497         LOG_DEBUG("%i: 0x%8.8" PRIx32 "", ice_reg->addr, value);
 498
 499         jtag_set_end_state(TAP_IDLE);
 500         arm_jtag_scann(ice_reg->jtag_info, 0x2);
 501
 502         arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr, NULL);
 503
 504         uint8_t reg_addr = ice_reg->addr & 0x1f;
 505         embeddedice_write_reg_inner(ice_reg->jtag_info->tap, reg_addr, value);
 506 }
 507
 508 /**
 509  * Queue a write for an EmbeddedICE register, using cached value.
 510  * Uses embeddedice_write_reg().
 511  */
 512 void embeddedice_store_reg(struct reg *reg)
 513 {
 514         embeddedice_write_reg(reg, buf_get_u32(reg->value, 0, reg->size));
 515 }
 516
 517 /**
 518  * Send a block of size 32-bit words to the DCC.
 519  * We assume the target is always going to be fast enough (relative to
 520  * the JTAG clock) that the debugger won't need to poll the handshake
 521  * bit.  The JTAG clock is usually at least six times slower than the
 522  * functional clock, so the 50+ JTAG clocks needed to receive the word
 523  * allow hundreds of instruction cycles (per word) in the target.
 524  */
 525 int embeddedice_send(struct arm_jtag *jtag_info, uint32_t *data, uint32_t size)
 526 {
 527         struct scan_field fields[3];
 528         uint8_t field0_out[4];
 529         uint8_t field1_out[1];
 530         uint8_t field2_out[1];
 531
 532         jtag_set_end_state(TAP_IDLE);
 533         arm_jtag_scann(jtag_info, 0x2);
 534         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 535
 536         fields[0].tap = jtag_info->tap;
 537         fields[0].num_bits = 32;
 538         fields[0].out_value = field0_out;
 539         fields[0].in_value = NULL;
 540
 541         fields[1].tap = jtag_info->tap;
 542         fields[1].num_bits = 5;
 543         fields[1].out_value = field1_out;
 544         fields[1].out_value[0] = eice_regs[EICE_COMMS_DATA].addr;
 545         fields[1].in_value = NULL;
 546
 547         fields[2].tap = jtag_info->tap;
 548         fields[2].num_bits = 1;
 549         fields[2].out_value = field2_out;
 550         fields[2].out_value[0] = 1;
 551
 552         fields[2].in_value = NULL;
 553
 554         while (size > 0)
 555         {
 556                 buf_set_u32(fields[0].out_value, 0, 32, *data);
 557                 jtag_add_dr_scan(3, fields, jtag_get_end_state());
 558
 559                 data++;
 560                 size--;
 561         }
 562
 563         /* call to jtag_execute_queue() intentionally omitted */
 564         return ERROR_OK;
 565 }
 566
 567 /**
 568  * Poll DCC control register until read or write handshake completes.
 569  */
 570 int embeddedice_handshake(struct arm_jtag *jtag_info, int hsbit, uint32_t timeout)
 571 {
 572         struct scan_field fields[3];
 573         uint8_t field0_in[4];
 574         uint8_t field1_out[1];
 575         uint8_t field2_out[1];
 576         int retval;
 577         uint32_t hsact;
 578         struct timeval lap;
 579         struct timeval now;
 580
 581         if (hsbit == EICE_COMM_CTRL_WBIT)
 582                 hsact = 1;
 583         else if (hsbit == EICE_COMM_CTRL_RBIT)
 584                 hsact = 0;
 585         else
 586                 return ERROR_INVALID_ARGUMENTS;
 587
 588         jtag_set_end_state(TAP_IDLE);
 589         arm_jtag_scann(jtag_info, 0x2);
 590         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 591
 592         fields[0].tap = jtag_info->tap;
 593         fields[0].num_bits = 32;
 594         fields[0].out_value = NULL;
 595         fields[0].in_value = field0_in;
 596
 597         fields[1].tap = jtag_info->tap;
 598         fields[1].num_bits = 5;
 599         fields[1].out_value = field1_out;
 600         fields[1].out_value[0] = eice_regs[EICE_COMMS_DATA].addr;
 601         fields[1].in_value = NULL;
 602
 603         fields[2].tap = jtag_info->tap;
 604         fields[2].num_bits = 1;
 605         fields[2].out_value = field2_out;
 606         fields[2].out_value[0] = 0;
 607         fields[2].in_value = NULL;
 608
 609         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 610         gettimeofday(&lap, NULL);
 611         do {
 612                 jtag_add_dr_scan(3, fields, jtag_get_end_state());
 613                 if ((retval = jtag_execute_queue()) != ERROR_OK)
 614                         return retval;
 615
 616                 if (buf_get_u32(field0_in, hsbit, 1) == hsact)
 617                         return ERROR_OK;
 618
 619                 gettimeofday(&now, NULL);
 620         } while ((uint32_t)((now.tv_sec - lap.tv_sec) * 1000
 621                         + (now.tv_usec - lap.tv_usec) / 1000) <= timeout);
 622
 623         return ERROR_TARGET_TIMEOUT;
 624 }
 625
 626 #ifndef HAVE_JTAG_MINIDRIVER_H
 627 /**
 628  * This is an inner loop of the open loop DCC write of data to target
 629  */
 630 void embeddedice_write_dcc(struct jtag_tap *tap,
 631                 int reg_addr, uint8_t *buffer, int little, int count)
 632 {
 633         int i;
 634
 635         for (i = 0; i < count; i++)
 636         {
 637                 embeddedice_write_reg_inner(tap, reg_addr,
 638                                 fast_target_buffer_get_u32(buffer, little));
 639                 buffer += 4;
 640         }
 641 }
 642 #else
 643 /* provided by minidriver */
 644 #endif