src/target/embeddedice.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 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
  32 #include "armv4_5.h"
  33 #include "arm7_9_common.h"
  34
  35 #include "log.h"
  36 #include "arm_jtag.h"
  37 #include "types.h"
  38 #include "binarybuffer.h"
  39 #include "target.h"
  40 #include "register.h"
  41 #include "jtag.h"
  42
  43 #include <stdlib.h>
  44
  45 #if 0
  46 static bitfield_desc_t embeddedice_comms_ctrl_bitfield_desc[] =
  47 {
  48         {"R", 1},
  49         {"W", 1},
  50         {"reserved", 26},
  51         {"version", 4}
  52 };
  53 #endif
  54
  55 static int embeddedice_reg_arch_info[] =
  56 {
  57         0x0, 0x1, 0x4, 0x5,
  58         0x8, 0x9, 0xa, 0xb, 0xc, 0xd,
  59         0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
  60         0x2
  61 };
  62
  63 static char* embeddedice_reg_list[] =
  64 {
  65         "debug_ctrl",
  66         "debug_status",
  67
  68         "comms_ctrl",
  69         "comms_data",
  70
  71         "watch 0 addr value",
  72         "watch 0 addr mask",
  73         "watch 0 data value",
  74         "watch 0 data mask",
  75         "watch 0 control value",
  76         "watch 0 control mask",
  77
  78         "watch 1 addr value",
  79         "watch 1 addr mask",
  80         "watch 1 data value",
  81         "watch 1 data mask",
  82         "watch 1 control value",
  83         "watch 1 control mask",
  84
  85         "vector catch"
  86 };
  87
  88 static int embeddedice_reg_arch_type = -1;
  89
  90 static int embeddedice_get_reg(reg_t *reg);
  91
  92 reg_cache_t* embeddedice_build_reg_cache(target_t *target, arm7_9_common_t *arm7_9)
  93 {
  94         int retval;
  95         reg_cache_t *reg_cache = malloc(sizeof(reg_cache_t));
  96         reg_t *reg_list = NULL;
  97         embeddedice_reg_t *arch_info = NULL;
  98         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
  99         int num_regs;
 100         int i;
 101         int eice_version = 0;
 102
 103         /* register a register arch-type for EmbeddedICE registers only once */
 104         if (embeddedice_reg_arch_type == -1)
 105                 embeddedice_reg_arch_type = register_reg_arch_type(embeddedice_get_reg, embeddedice_set_reg_w_exec);
 106
 107         if (arm7_9->has_vector_catch)
 108                 num_regs = 17;
 109         else
 110                 num_regs = 16;
 111
 112         /* the actual registers are kept in two arrays */
 113         reg_list = calloc(num_regs, sizeof(reg_t));
 114         arch_info = calloc(num_regs, sizeof(embeddedice_reg_t));
 115
 116         /* fill in values for the reg cache */
 117         reg_cache->name = "EmbeddedICE registers";
 118         reg_cache->next = NULL;
 119         reg_cache->reg_list = reg_list;
 120         reg_cache->num_regs = num_regs;
 121
 122         /* set up registers */
 123         for (i = 0; i < num_regs; i++)
 124         {
 125                 reg_list[i].name = embeddedice_reg_list[i];
 126                 reg_list[i].size = 32;
 127                 reg_list[i].dirty = 0;
 128                 reg_list[i].valid = 0;
 129                 reg_list[i].bitfield_desc = NULL;
 130                 reg_list[i].num_bitfields = 0;
 131                 reg_list[i].value = calloc(1, 4);
 132                 reg_list[i].arch_info = &arch_info[i];
 133                 reg_list[i].arch_type = embeddedice_reg_arch_type;
 134                 arch_info[i].addr = embeddedice_reg_arch_info[i];
 135                 arch_info[i].jtag_info = jtag_info;
 136         }
 137
 138         /* identify EmbeddedICE version by reading DCC control register */
 139         embeddedice_read_reg(&reg_list[EICE_COMMS_CTRL]);
 140         if ((retval=jtag_execute_queue())!=ERROR_OK)
 141         {
 142                 for (i = 0; i < num_regs; i++)
 143                 {
 144                         free(reg_list[i].value);
 145                 }
 146                 free(reg_list);
 147                 free(arch_info);
 148                 return NULL;
 149         }
 150
 151         eice_version = buf_get_u32(reg_list[EICE_COMMS_CTRL].value, 28, 4);
 152
 153         switch (eice_version)
 154         {
 155                 case 1:
 156                         reg_list[EICE_DBG_CTRL].size = 3;
 157                         reg_list[EICE_DBG_STAT].size = 5;
 158                         break;
 159                 case 2:
 160                         reg_list[EICE_DBG_CTRL].size = 4;
 161                         reg_list[EICE_DBG_STAT].size = 5;
 162                         arm7_9->has_single_step = 1;
 163                         break;
 164                 case 3:
 165                         LOG_ERROR("EmbeddedICE version 3 detected, EmbeddedICE handling might be broken");
 166                         reg_list[EICE_DBG_CTRL].size = 6;
 167                         reg_list[EICE_DBG_STAT].size = 5;
 168                         arm7_9->has_single_step = 1;
 169                         arm7_9->has_monitor_mode = 1;
 170                         break;
 171                 case 4:
 172                         reg_list[EICE_DBG_CTRL].size = 6;
 173                         reg_list[EICE_DBG_STAT].size = 5;
 174                         arm7_9->has_monitor_mode = 1;
 175                         break;
 176                 case 5:
 177                         reg_list[EICE_DBG_CTRL].size = 6;
 178                         reg_list[EICE_DBG_STAT].size = 5;
 179                         arm7_9->has_single_step = 1;
 180                         arm7_9->has_monitor_mode = 1;
 181                         break;
 182                 case 6:
 183                         reg_list[EICE_DBG_CTRL].size = 6;
 184                         reg_list[EICE_DBG_STAT].size = 10;
 185                         arm7_9->has_monitor_mode = 1;
 186                         break;
 187                 case 7:
 188                         LOG_WARNING("EmbeddedICE version 7 detected, EmbeddedICE handling might be broken");
 189                         reg_list[EICE_DBG_CTRL].size = 6;
 190                         reg_list[EICE_DBG_STAT].size = 5;
 191                         arm7_9->has_monitor_mode = 1;
 192                         break;
 193                 default:
 194                         LOG_ERROR("unknown EmbeddedICE version (comms ctrl: 0x%8.8x)", buf_get_u32(reg_list[EICE_COMMS_CTRL].value, 0, 32));
 195         }
 196
 197         return reg_cache;
 198 }
 199
 200 int embeddedice_setup(target_t *target)
 201 {
 202         int retval;
 203         armv4_5_common_t *armv4_5 = target->arch_info;
 204         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 205
 206         /* explicitly disable monitor mode */
 207         if (arm7_9->has_monitor_mode)
 208         {
 209                 reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
 210
 211                 embeddedice_read_reg(dbg_ctrl);
 212                 if ((retval=jtag_execute_queue())!=ERROR_OK)
 213                         return retval;
 214                 buf_set_u32(dbg_ctrl->value, 4, 1, 0);
 215                 embeddedice_set_reg_w_exec(dbg_ctrl, dbg_ctrl->value);
 216         }
 217         return jtag_execute_queue();
 218 }
 219
 220 static int embeddedice_get_reg(reg_t *reg)
 221 {
 222         int retval;
 223         if ((retval = embeddedice_read_reg(reg)) != ERROR_OK)
 224         {
 225                 LOG_ERROR("BUG: error scheduling EmbeddedICE register read");
 226                 return retval;
 227         }
 228
 229         if ((retval = jtag_execute_queue()) != ERROR_OK)
 230         {
 231                 LOG_ERROR("register read failed");
 232                 return retval;
 233         }
 234
 235         return ERROR_OK;
 236 }
 237
 238 int embeddedice_read_reg_w_check(reg_t *reg, u8* check_value, u8* check_mask)
 239 {
 240         embeddedice_reg_t *ice_reg = reg->arch_info;
 241         u8 reg_addr = ice_reg->addr & 0x1f;
 242         scan_field_t fields[3];
 243         u8 field1_out[1];
 244         u8 field2_out[1];
 245
 246         jtag_add_end_state(TAP_IDLE);
 247         arm_jtag_scann(ice_reg->jtag_info, 0x2);
 248
 249         arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr, NULL);
 250
 251         fields[0].tap = ice_reg->jtag_info->tap;
 252         fields[0].num_bits = 32;
 253         fields[0].out_value = reg->value;
 254         fields[0].in_value = NULL;
 255         fields[0].in_handler = NULL;
 256
 257         fields[1].tap = ice_reg->jtag_info->tap;
 258         fields[1].num_bits = 5;
 259         fields[1].out_value = field1_out;
 260         buf_set_u32(fields[1].out_value, 0, 5, reg_addr);
 261         fields[1].in_value = NULL;
 262         fields[1].in_handler = NULL;
 263
 264         fields[2].tap = ice_reg->jtag_info->tap;
 265         fields[2].num_bits = 1;
 266         fields[2].out_value = field2_out;
 267         buf_set_u32(fields[2].out_value, 0, 1, 0);
 268         fields[2].in_value = NULL;
 269         fields[2].in_handler = NULL;
 270
 271         jtag_add_dr_scan(3, fields, TAP_INVALID);
 272
 273         fields[0].in_value = reg->value;
 274
 275         /* when reading the DCC data register, leaving the address field set to
 276          * EICE_COMMS_DATA would read the register twice
 277          * reading the control register is safe
 278          */
 279         buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
 280
 281         jtag_add_dr_scan(3, fields, TAP_INVALID);
 282
 283         jtag_check_value_mask(fields+0, check_value, check_mask);
 284
 285         return ERROR_OK;
 286 }
 287
 288 /* receive <size> words of 32 bit from the DCC
 289  * we pretend the target is always going to be fast enough
 290  * (relative to the JTAG clock), so we don't need to handshake
 291  */
 292 int embeddedice_receive(arm_jtag_t *jtag_info, u32 *data, u32 size)
 293 {
 294         scan_field_t fields[3];
 295         u8 field1_out[1];
 296         u8 field2_out[1];
 297
 298         jtag_add_end_state(TAP_IDLE);
 299         arm_jtag_scann(jtag_info, 0x2);
 300         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 301
 302         fields[0].tap = jtag_info->tap;
 303         fields[0].num_bits = 32;
 304         fields[0].out_value = NULL;
 305         u8 tmp[4];
 306         fields[0].in_value = tmp;
 307         fields[0].in_handler = NULL;
 308
 309         fields[1].tap = jtag_info->tap;
 310         fields[1].num_bits = 5;
 311         fields[1].out_value = field1_out;
 312         buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_DATA]);
 313         fields[1].in_value = NULL;
 314         fields[1].in_handler = NULL;
 315
 316         fields[2].tap = jtag_info->tap;
 317         fields[2].num_bits = 1;
 318         fields[2].out_value = field2_out;
 319         buf_set_u32(fields[2].out_value, 0, 1, 0);
 320         fields[2].in_value = NULL;
 321         fields[2].in_handler = NULL;
 322
 323         jtag_add_dr_scan(3, fields, TAP_INVALID);
 324
 325         while (size > 0)
 326         {
 327                 /* when reading the last item, set the register address to the DCC control reg,
 328                  * to avoid reading additional data from the DCC data reg
 329                  */
 330                 if (size == 1)
 331                         buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
 332
 333                 jtag_add_dr_scan_now(3, fields, TAP_INVALID);
 334
 335                 *data = le_to_h_u32(tmp);
 336
 337                 data++;
 338                 size--;
 339         }
 340
 341         return jtag_execute_queue();
 342 }
 343
 344 int embeddedice_read_reg(reg_t *reg)
 345 {
 346         return embeddedice_read_reg_w_check(reg, NULL, NULL);
 347 }
 348
 349 void embeddedice_set_reg(reg_t *reg, u32 value)
 350 {
 351         embeddedice_write_reg(reg, value);
 352
 353         buf_set_u32(reg->value, 0, reg->size, value);
 354         reg->valid = 1;
 355         reg->dirty = 0;
 356
 357 }
 358
 359 int embeddedice_set_reg_w_exec(reg_t *reg, u8 *buf)
 360 {
 361         int retval;
 362         embeddedice_set_reg(reg, buf_get_u32(buf, 0, reg->size));
 363
 364         if ((retval = jtag_execute_queue()) != ERROR_OK)
 365         {
 366                 LOG_ERROR("register write failed");
 367                 return retval;
 368         }
 369         return ERROR_OK;
 370 }
 371
 372 void embeddedice_write_reg(reg_t *reg, u32 value)
 373 {
 374         embeddedice_reg_t *ice_reg = reg->arch_info;
 375
 376         LOG_DEBUG("%i: 0x%8.8x", ice_reg->addr, value);
 377
 378         jtag_add_end_state(TAP_IDLE);
 379         arm_jtag_scann(ice_reg->jtag_info, 0x2);
 380
 381         arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr, NULL);
 382
 383         u8 reg_addr = ice_reg->addr & 0x1f;
 384         embeddedice_write_reg_inner(ice_reg->jtag_info->tap, reg_addr, value);
 385
 386 }
 387
 388 void embeddedice_store_reg(reg_t *reg)
 389 {
 390         embeddedice_write_reg(reg, buf_get_u32(reg->value, 0, reg->size));
 391 }
 392
 393 /* send <size> words of 32 bit to the DCC
 394  * we pretend the target is always going to be fast enough
 395  * (relative to the JTAG clock), so we don't need to handshake
 396  */
 397 int embeddedice_send(arm_jtag_t *jtag_info, u32 *data, u32 size)
 398 {
 399         scan_field_t fields[3];
 400         u8 field0_out[4];
 401         u8 field1_out[1];
 402         u8 field2_out[1];
 403
 404         jtag_add_end_state(TAP_IDLE);
 405         arm_jtag_scann(jtag_info, 0x2);
 406         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 407
 408         fields[0].tap = jtag_info->tap;
 409         fields[0].num_bits = 32;
 410         fields[0].out_value = field0_out;
 411
 412         fields[0].in_value = NULL;
 413
 414
 415         fields[0].in_handler = NULL;
 416
 417
 418         fields[1].tap = jtag_info->tap;
 419         fields[1].num_bits = 5;
 420         fields[1].out_value = field1_out;
 421         buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_DATA]);
 422
 423         fields[1].in_value = NULL;
 424
 425
 426         fields[1].in_handler = NULL;
 427
 428
 429         fields[2].tap = jtag_info->tap;
 430         fields[2].num_bits = 1;
 431         fields[2].out_value = field2_out;
 432         buf_set_u32(fields[2].out_value, 0, 1, 1);
 433
 434         fields[2].in_value = NULL;
 435
 436
 437         fields[2].in_handler = NULL;
 438
 439
 440         while (size > 0)
 441         {
 442                 buf_set_u32(fields[0].out_value, 0, 32, *data);
 443                 jtag_add_dr_scan(3, fields, TAP_INVALID);
 444
 445                 data++;
 446                 size--;
 447         }
 448
 449         /* call to jtag_execute_queue() intentionally omitted */
 450         return ERROR_OK;
 451 }
 452
 453 /* wait for DCC control register R/W handshake bit to become active
 454  */
 455 int embeddedice_handshake(arm_jtag_t *jtag_info, int hsbit, u32 timeout)
 456 {
 457         scan_field_t fields[3];
 458         u8 field0_in[4];
 459         u8 field1_out[1];
 460         u8 field2_out[1];
 461         int retval;
 462         u32 hsact;
 463         struct timeval lap;
 464         struct timeval now;
 465
 466         if (hsbit == EICE_COMM_CTRL_WBIT)
 467                 hsact = 1;
 468         else if (hsbit == EICE_COMM_CTRL_RBIT)
 469                 hsact = 0;
 470         else
 471                 return ERROR_INVALID_ARGUMENTS;
 472
 473         jtag_add_end_state(TAP_IDLE);
 474         arm_jtag_scann(jtag_info, 0x2);
 475         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 476
 477         fields[0].tap = jtag_info->tap;
 478         fields[0].num_bits = 32;
 479         fields[0].out_value = NULL;
 480
 481         fields[0].in_value = field0_in;
 482
 483
 484         fields[0].in_handler = NULL;
 485
 486
 487         fields[1].tap = jtag_info->tap;
 488         fields[1].num_bits = 5;
 489         fields[1].out_value = field1_out;
 490         buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
 491
 492         fields[1].in_value = NULL;
 493
 494
 495         fields[1].in_handler = NULL;
 496
 497
 498         fields[2].tap = jtag_info->tap;
 499         fields[2].num_bits = 1;
 500         fields[2].out_value = field2_out;
 501         buf_set_u32(fields[2].out_value, 0, 1, 0);
 502
 503         fields[2].in_value = NULL;
 504
 505
 506         fields[2].in_handler = NULL;
 507
 508
 509         jtag_add_dr_scan(3, fields, TAP_INVALID);
 510         gettimeofday(&lap, NULL);
 511         do
 512         {
 513                 jtag_add_dr_scan(3, fields, TAP_INVALID);
 514                 if ((retval = jtag_execute_queue()) != ERROR_OK)
 515                         return retval;
 516
 517                 if (buf_get_u32(field0_in, hsbit, 1) == hsact)
 518                         return ERROR_OK;
 519
 520                 gettimeofday(&now, NULL);
 521         }
 522         while ((u32)((now.tv_sec-lap.tv_sec)*1000 + (now.tv_usec-lap.tv_usec)/1000) <= timeout);
 523
 524         return ERROR_TARGET_TIMEOUT;
 525 }
 526
 527 /* this is the inner loop of the open loop DCC write of data to target */
 528 void MINIDRIVER(embeddedice_write_dcc)(jtag_tap_t *tap, int reg_addr, u8 *buffer, int little, int count)
 529 {
 530         int i;
 531         for (i = 0; i < count; i++)
 532         {
 533                 embeddedice_write_reg_inner(tap, reg_addr, fast_target_buffer_get_u32(buffer, little));
 534                 buffer += 4;
 535         }
 536 }