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   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
 255         fields[0].in_value = NULL;
 256         fields[0].in_check_value = NULL;
 257         fields[0].in_check_mask = NULL;
 258         fields[0].in_handler = NULL;
 259         fields[0].in_handler_priv = NULL;
 260
 261         fields[1].tap = ice_reg->jtag_info->tap;
 262         fields[1].num_bits = 5;
 263         fields[1].out_value = field1_out;
 264         buf_set_u32(fields[1].out_value, 0, 5, reg_addr);
 265
 266         fields[1].in_value = NULL;
 267         fields[1].in_check_value = NULL;
 268         fields[1].in_check_mask = NULL;
 269         fields[1].in_handler = NULL;
 270         fields[1].in_handler_priv = NULL;
 271
 272         fields[2].tap = ice_reg->jtag_info->tap;
 273         fields[2].num_bits = 1;
 274         fields[2].out_value = field2_out;
 275         buf_set_u32(fields[2].out_value, 0, 1, 0);
 276
 277         fields[2].in_value = NULL;
 278         fields[2].in_check_value = NULL;
 279         fields[2].in_check_mask = NULL;
 280         fields[2].in_handler = NULL;
 281         fields[2].in_handler_priv = NULL;
 282
 283         jtag_add_dr_scan(3, fields, TAP_INVALID);
 284
 285         fields[0].in_value = reg->value;
 286         jtag_set_check_value(fields+0, check_value, check_mask, NULL);
 287
 288         /* when reading the DCC data register, leaving the address field set to
 289          * EICE_COMMS_DATA would read the register twice
 290          * reading the control register is safe
 291          */
 292         buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
 293
 294         jtag_add_dr_scan(3, fields, TAP_INVALID);
 295
 296         return ERROR_OK;
 297 }
 298
 299 /* receive <size> words of 32 bit from the DCC
 300  * we pretend the target is always going to be fast enough
 301  * (relative to the JTAG clock), so we don't need to handshake
 302  */
 303 int embeddedice_receive(arm_jtag_t *jtag_info, u32 *data, u32 size)
 304 {
 305         scan_field_t fields[3];
 306         u8 field1_out[1];
 307         u8 field2_out[1];
 308
 309         jtag_add_end_state(TAP_IDLE);
 310         arm_jtag_scann(jtag_info, 0x2);
 311         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 312
 313         fields[0].tap = jtag_info->tap;
 314         fields[0].num_bits = 32;
 315         fields[0].out_value = NULL;
 316
 317         fields[0].in_value = NULL;
 318         fields[0].in_check_value = NULL;
 319         fields[0].in_check_mask = NULL;
 320         fields[0].in_handler = NULL;
 321         fields[0].in_handler_priv = NULL;
 322
 323         fields[1].tap = jtag_info->tap;
 324         fields[1].num_bits = 5;
 325         fields[1].out_value = field1_out;
 326         buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_DATA]);
 327
 328         fields[1].in_value = NULL;
 329         fields[1].in_check_value = NULL;
 330         fields[1].in_check_mask = NULL;
 331         fields[1].in_handler = NULL;
 332         fields[1].in_handler_priv = NULL;
 333
 334         fields[2].tap = jtag_info->tap;
 335         fields[2].num_bits = 1;
 336         fields[2].out_value = field2_out;
 337         buf_set_u32(fields[2].out_value, 0, 1, 0);
 338
 339         fields[2].in_value = NULL;
 340         fields[2].in_check_value = NULL;
 341         fields[2].in_check_mask = NULL;
 342         fields[2].in_handler = NULL;
 343         fields[2].in_handler_priv = NULL;
 344
 345         jtag_add_dr_scan(3, fields, TAP_INVALID);
 346
 347         while (size > 0)
 348         {
 349                 /* when reading the last item, set the register address to the DCC control reg,
 350                  * to avoid reading additional data from the DCC data reg
 351                  */
 352                 if (size == 1)
 353                         buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
 354
 355                 fields[0].in_handler = arm_jtag_buf_to_u32; /* deprecated! invoke this from user code! */
 356                 fields[0].in_handler_priv = data;
 357                 jtag_add_dr_scan(3, fields, TAP_INVALID);
 358
 359                 data++;
 360                 size--;
 361         }
 362
 363         return jtag_execute_queue();
 364 }
 365
 366 int embeddedice_read_reg(reg_t *reg)
 367 {
 368         return embeddedice_read_reg_w_check(reg, NULL, NULL);
 369 }
 370
 371 void embeddedice_set_reg(reg_t *reg, u32 value)
 372 {
 373         embeddedice_write_reg(reg, value);
 374
 375         buf_set_u32(reg->value, 0, reg->size, value);
 376         reg->valid = 1;
 377         reg->dirty = 0;
 378
 379 }
 380
 381 int embeddedice_set_reg_w_exec(reg_t *reg, u8 *buf)
 382 {
 383         int retval;
 384         embeddedice_set_reg(reg, buf_get_u32(buf, 0, reg->size));
 385
 386         if ((retval = jtag_execute_queue()) != ERROR_OK)
 387         {
 388                 LOG_ERROR("register write failed");
 389                 return retval;
 390         }
 391         return ERROR_OK;
 392 }
 393
 394 void embeddedice_write_reg(reg_t *reg, u32 value)
 395 {
 396         embeddedice_reg_t *ice_reg = reg->arch_info;
 397
 398         LOG_DEBUG("%i: 0x%8.8x", ice_reg->addr, value);
 399
 400         jtag_add_end_state(TAP_IDLE);
 401         arm_jtag_scann(ice_reg->jtag_info, 0x2);
 402
 403         arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr, NULL);
 404
 405         u8 reg_addr = ice_reg->addr & 0x1f;
 406         embeddedice_write_reg_inner(ice_reg->jtag_info->tap, reg_addr, value);
 407
 408 }
 409
 410 void embeddedice_store_reg(reg_t *reg)
 411 {
 412         embeddedice_write_reg(reg, buf_get_u32(reg->value, 0, reg->size));
 413 }
 414
 415 /* send <size> words of 32 bit to the DCC
 416  * we pretend the target is always going to be fast enough
 417  * (relative to the JTAG clock), so we don't need to handshake
 418  */
 419 int embeddedice_send(arm_jtag_t *jtag_info, u32 *data, u32 size)
 420 {
 421         scan_field_t fields[3];
 422         u8 field0_out[4];
 423         u8 field1_out[1];
 424         u8 field2_out[1];
 425
 426         jtag_add_end_state(TAP_IDLE);
 427         arm_jtag_scann(jtag_info, 0x2);
 428         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 429
 430         fields[0].tap = jtag_info->tap;
 431         fields[0].num_bits = 32;
 432         fields[0].out_value = field0_out;
 433
 434         fields[0].in_value = NULL;
 435         fields[0].in_check_value = NULL;
 436         fields[0].in_check_mask = NULL;
 437         fields[0].in_handler = NULL;
 438         fields[0].in_handler_priv = NULL;
 439
 440         fields[1].tap = jtag_info->tap;
 441         fields[1].num_bits = 5;
 442         fields[1].out_value = field1_out;
 443         buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_DATA]);
 444
 445         fields[1].in_value = NULL;
 446         fields[1].in_check_value = NULL;
 447         fields[1].in_check_mask = NULL;
 448         fields[1].in_handler = NULL;
 449         fields[1].in_handler_priv = NULL;
 450
 451         fields[2].tap = jtag_info->tap;
 452         fields[2].num_bits = 1;
 453         fields[2].out_value = field2_out;
 454         buf_set_u32(fields[2].out_value, 0, 1, 1);
 455
 456         fields[2].in_value = NULL;
 457         fields[2].in_check_value = NULL;
 458         fields[2].in_check_mask = NULL;
 459         fields[2].in_handler = NULL;
 460         fields[2].in_handler_priv = NULL;
 461
 462         while (size > 0)
 463         {
 464                 buf_set_u32(fields[0].out_value, 0, 32, *data);
 465                 jtag_add_dr_scan(3, fields, TAP_INVALID);
 466
 467                 data++;
 468                 size--;
 469         }
 470
 471         /* call to jtag_execute_queue() intentionally omitted */
 472         return ERROR_OK;
 473 }
 474
 475 /* wait for DCC control register R/W handshake bit to become active
 476  */
 477 int embeddedice_handshake(arm_jtag_t *jtag_info, int hsbit, u32 timeout)
 478 {
 479         scan_field_t fields[3];
 480         u8 field0_in[4];
 481         u8 field1_out[1];
 482         u8 field2_out[1];
 483         int retval;
 484         u32 hsact;
 485         struct timeval lap;
 486         struct timeval now;
 487
 488         if (hsbit == EICE_COMM_CTRL_WBIT)
 489                 hsact = 1;
 490         else if (hsbit == EICE_COMM_CTRL_RBIT)
 491                 hsact = 0;
 492         else
 493                 return ERROR_INVALID_ARGUMENTS;
 494
 495         jtag_add_end_state(TAP_IDLE);
 496         arm_jtag_scann(jtag_info, 0x2);
 497         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 498
 499         fields[0].tap = jtag_info->tap;
 500         fields[0].num_bits = 32;
 501         fields[0].out_value = NULL;
 502
 503         fields[0].in_value = field0_in;
 504         fields[0].in_check_value = NULL;
 505         fields[0].in_check_mask = NULL;
 506         fields[0].in_handler = NULL;
 507         fields[0].in_handler_priv = NULL;
 508
 509         fields[1].tap = jtag_info->tap;
 510         fields[1].num_bits = 5;
 511         fields[1].out_value = field1_out;
 512         buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
 513
 514         fields[1].in_value = NULL;
 515         fields[1].in_check_value = NULL;
 516         fields[1].in_check_mask = NULL;
 517         fields[1].in_handler = NULL;
 518         fields[1].in_handler_priv = NULL;
 519
 520         fields[2].tap = jtag_info->tap;
 521         fields[2].num_bits = 1;
 522         fields[2].out_value = field2_out;
 523         buf_set_u32(fields[2].out_value, 0, 1, 0);
 524
 525         fields[2].in_value = NULL;
 526         fields[2].in_check_value = NULL;
 527         fields[2].in_check_mask = NULL;
 528         fields[2].in_handler = NULL;
 529         fields[2].in_handler_priv = NULL;
 530
 531         jtag_add_dr_scan(3, fields, TAP_INVALID);
 532         gettimeofday(&lap, NULL);
 533         do
 534         {
 535                 jtag_add_dr_scan(3, fields, TAP_INVALID);
 536                 if ((retval = jtag_execute_queue()) != ERROR_OK)
 537                         return retval;
 538
 539                 if (buf_get_u32(field0_in, hsbit, 1) == hsact)
 540                         return ERROR_OK;
 541
 542                 gettimeofday(&now, NULL);
 543         }
 544         while ((u32)((now.tv_sec-lap.tv_sec)*1000 + (now.tv_usec-lap.tv_usec)/1000) <= timeout);
 545
 546         return ERROR_TARGET_TIMEOUT;
 547 }
 548
 549 /* this is the inner loop of the open loop DCC write of data to target */
 550 void MINIDRIVER(embeddedice_write_dcc)(jtag_tap_t *tap, int reg_addr, u8 *buffer, int little, int count)
 551 {
 552         int i;
 553         for (i = 0; i < count; i++)
 554         {
 555                 embeddedice_write_reg_inner(tap, reg_addr, fast_target_buffer_get_u32(buffer, little));
 556                 buffer += 4;
 557         }
 558 }