src/target/arm7tdmi.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2008 by Spencer Oliver                                  *
   6  *   spen@spen-soft.co.uk                                                  *
   7  *                                                                         *
   8  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   9  *   oyvind.harboe@zylin.com                                               *
  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 "arm7tdmi.h"
  31
  32 #include "arm7_9_common.h"
  33 #include "register.h"
  34 #include "target.h"
  35 #include "armv4_5.h"
  36 #include "embeddedice.h"
  37 #include "etm.h"
  38 #include "log.h"
  39 #include "jtag.h"
  40 #include "arm_jtag.h"
  41
  42 #include <stdlib.h>
  43 #include <string.h>
  44
  45 #if 0
  46 #define _DEBUG_INSTRUCTION_EXECUTION_
  47 #endif
  48
  49 /* forward declarations */
  50
  51 int arm7tdmi_target_create(struct target_s *target,Jim_Interp *interp);
  52 int arm7tdmi_quit(void);
  53
  54 /* target function declarations */
  55 int arm7tdmi_poll(struct target_s *target);
  56 int arm7tdmi_halt(target_t *target);
  57
  58 target_type_t arm7tdmi_target =
  59 {
  60         .name = "arm7tdmi",
  61
  62         .poll = arm7_9_poll,
  63         .arch_state = armv4_5_arch_state,
  64
  65         .target_request_data = arm7_9_target_request_data,
  66
  67         .halt = arm7_9_halt,
  68         .resume = arm7_9_resume,
  69         .step = arm7_9_step,
  70
  71         .assert_reset = arm7_9_assert_reset,
  72         .deassert_reset = arm7_9_deassert_reset,
  73         .soft_reset_halt = arm7_9_soft_reset_halt,
  74
  75         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  76
  77         .read_memory = arm7_9_read_memory,
  78         .write_memory = arm7_9_write_memory,
  79         .bulk_write_memory = arm7_9_bulk_write_memory,
  80         .checksum_memory = arm7_9_checksum_memory,
  81         .blank_check_memory = arm7_9_blank_check_memory,
  82
  83         .run_algorithm = armv4_5_run_algorithm,
  84
  85         .add_breakpoint = arm7_9_add_breakpoint,
  86         .remove_breakpoint = arm7_9_remove_breakpoint,
  87         .add_watchpoint = arm7_9_add_watchpoint,
  88         .remove_watchpoint = arm7_9_remove_watchpoint,
  89
  90         .register_commands  = arm7tdmi_register_commands,
  91         .target_create  = arm7tdmi_target_create,
  92         .init_target = arm7tdmi_init_target,
  93         .examine = arm7tdmi_examine,
  94         .quit = arm7tdmi_quit
  95 };
  96
  97 int arm7tdmi_examine_debug_reason(target_t *target)
  98 {
  99         int retval = ERROR_OK;
 100         /* get pointers to arch-specific information */
 101         armv4_5_common_t *armv4_5 = target->arch_info;
 102         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 103
 104         /* only check the debug reason if we don't know it already */
 105         if ((target->debug_reason != DBG_REASON_DBGRQ)
 106                         && (target->debug_reason != DBG_REASON_SINGLESTEP))
 107         {
 108                 scan_field_t fields[2];
 109                 u8 databus[4];
 110                 u8 breakpoint;
 111
 112                 jtag_add_end_state(TAP_DRPAUSE);
 113
 114                 fields[0].tap = arm7_9->jtag_info.tap;
 115                 fields[0].num_bits = 1;
 116                 fields[0].out_value = NULL;
 117                 fields[0].in_value = &breakpoint;
 118                 fields[0].in_handler = NULL;
 119
 120                 fields[1].tap = arm7_9->jtag_info.tap;
 121                 fields[1].num_bits = 32;
 122                 fields[1].out_value = NULL;
 123                 fields[1].in_value = databus;
 124                 fields[1].in_handler = NULL;
 125
 126                 if((retval = arm_jtag_scann(&arm7_9->jtag_info, 0x1)) != ERROR_OK)
 127                 {
 128                         return retval;
 129                 }
 130                 arm_jtag_set_instr(&arm7_9->jtag_info, arm7_9->jtag_info.intest_instr, NULL);
 131
 132                 jtag_add_dr_scan(2, fields, TAP_DRPAUSE);
 133                 if((retval = jtag_execute_queue()) != ERROR_OK)
 134                 {
 135                         return retval;
 136                 }
 137
 138                 fields[0].in_value = NULL;
 139                 fields[0].out_value = &breakpoint;
 140                 fields[1].in_value = NULL;
 141                 fields[1].out_value = databus;
 142
 143                 jtag_add_dr_scan(2, fields, TAP_DRPAUSE);
 144
 145                 if (breakpoint & 1)
 146                         target->debug_reason = DBG_REASON_WATCHPOINT;
 147                 else
 148                         target->debug_reason = DBG_REASON_BREAKPOINT;
 149         }
 150
 151         return ERROR_OK;
 152 }
 153
 154 static int arm7tdmi_num_bits[]={1, 32};
 155 static __inline int arm7tdmi_clock_out_inner(arm_jtag_t *jtag_info, u32 out, int breakpoint)
 156 {
 157         u32 values[2]={breakpoint, flip_u32(out, 32)};
 158
 159         jtag_add_dr_out(jtag_info->tap,
 160                         2,
 161                         arm7tdmi_num_bits,
 162                         values,
 163                         TAP_INVALID);
 164
 165         jtag_add_runtest(0, TAP_INVALID);
 166
 167         return ERROR_OK;
 168 }
 169
 170 /* put an instruction in the ARM7TDMI pipeline or write the data bus, and optionally read data */
 171 static __inline int arm7tdmi_clock_out(arm_jtag_t *jtag_info, u32 out, u32 *deprecated, int breakpoint)
 172 {
 173         jtag_add_end_state(TAP_DRPAUSE);
 174         arm_jtag_scann(jtag_info, 0x1);
 175         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 176
 177         return arm7tdmi_clock_out_inner(jtag_info, out, breakpoint);
 178 }
 179
 180 /* clock the target, reading the databus */
 181 int arm7tdmi_clock_data_in(arm_jtag_t *jtag_info, u32 *in)
 182 {
 183         int retval = ERROR_OK;
 184         scan_field_t fields[2];
 185
 186         jtag_add_end_state(TAP_DRPAUSE);
 187         if((retval = arm_jtag_scann(jtag_info, 0x1)) != ERROR_OK)
 188         {
 189                 return retval;
 190         }
 191         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 192
 193         fields[0].tap = jtag_info->tap;
 194         fields[0].num_bits = 1;
 195         fields[0].out_value = NULL;
 196         fields[0].in_value = NULL;
 197         fields[0].in_handler = NULL;
 198
 199
 200         fields[1].tap = jtag_info->tap;
 201         fields[1].num_bits = 32;
 202         fields[1].out_value = NULL;
 203         u8 tmp[4];
 204         fields[1].in_value = tmp;
 205         fields[1].in_handler = NULL;
 206
 207         jtag_add_dr_scan_now(2, fields, TAP_INVALID);
 208
 209         if (jtag_error==ERROR_OK)
 210         {
 211                 *in=flip_u32(le_to_h_u32(tmp), 32);
 212         }
 213
 214         jtag_add_runtest(0, TAP_INVALID);
 215
 216 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 217 {
 218                 if((retval = jtag_execute_queue()) != ERROR_OK)
 219                 {
 220                         return retval;
 221                 }
 222
 223                 if (in)
 224                 {
 225                         LOG_DEBUG("in: 0x%8.8x", *in);
 226                 }
 227                 else
 228                 {
 229                         LOG_ERROR("BUG: called with in == NULL");
 230                 }
 231 }
 232 #endif
 233
 234         return ERROR_OK;
 235 }
 236
 237 /* clock the target, and read the databus
 238  * the *in pointer points to a buffer where elements of 'size' bytes
 239  * are stored in big (be==1) or little (be==0) endianness
 240  */
 241 int arm7tdmi_clock_data_in_endianness(arm_jtag_t *jtag_info, void *in, int size, int be)
 242 {
 243         int retval = ERROR_OK;
 244         scan_field_t fields[2];
 245
 246         jtag_add_end_state(TAP_DRPAUSE);
 247         if((retval = arm_jtag_scann(jtag_info, 0x1)) != ERROR_OK)
 248         {
 249                 return retval;
 250         }
 251         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 252
 253         fields[0].tap = jtag_info->tap;
 254         fields[0].num_bits = 1;
 255         fields[0].out_value = NULL;
 256         fields[0].in_value = NULL;
 257         fields[0].in_handler = NULL;
 258
 259         fields[1].tap = jtag_info->tap;
 260         fields[1].num_bits = 32;
 261         fields[1].out_value = NULL;
 262         u8 tmp[4];
 263         fields[1].in_value = tmp;
 264         fields[1].in_handler = NULL;
 265
 266         jtag_add_dr_scan_now(2, fields, TAP_INVALID);
 267
 268         switch (size)
 269         {
 270                 case 4:
 271                         if (be)
 272                         {
 273                                 h_u32_to_be(((u8*)in), flip_u32(le_to_h_u32(tmp), 32));
 274                         } else
 275                         {
 276                                  h_u32_to_le(((u8*)in), flip_u32(le_to_h_u32(tmp), 32));
 277                         }
 278                         break;
 279                 case 2:
 280                         if (be)
 281                         {
 282                                 h_u16_to_be(((u8*)in), flip_u32(le_to_h_u32(tmp), 32) & 0xffff);
 283                         } else
 284                         {
 285                                 h_u16_to_le(((u8*)in), flip_u32(le_to_h_u32(tmp), 32) & 0xffff);
 286                         }
 287                         break;
 288                 case 1:
 289                         *((u8 *)in)= flip_u32(le_to_h_u32(tmp), 32) & 0xff;
 290                         break;
 291         }
 292
 293         jtag_add_runtest(0, TAP_INVALID);
 294
 295 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 296 {
 297                 if((retval = jtag_execute_queue()) != ERROR_OK)
 298                 {
 299                         return retval;
 300                 }
 301
 302                 if (in)
 303                 {
 304                         LOG_DEBUG("in: 0x%8.8x", *(u32*)in);
 305                 }
 306                 else
 307                 {
 308                         LOG_ERROR("BUG: called with in == NULL");
 309                 }
 310 }
 311 #endif
 312
 313         return ERROR_OK;
 314 }
 315
 316 void arm7tdmi_change_to_arm(target_t *target, u32 *r0, u32 *pc)
 317 {
 318         /* get pointers to arch-specific information */
 319         armv4_5_common_t *armv4_5 = target->arch_info;
 320         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 321         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 322
 323         /* save r0 before using it and put system in ARM state
 324          * to allow common handling of ARM and THUMB debugging */
 325
 326         /* fetch STR r0, [r0] */
 327         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), NULL, 0);
 328         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 329         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 330         /* nothing fetched, STR r0, [r0] in Execute (2) */
 331         arm7tdmi_clock_data_in(jtag_info, r0);
 332
 333         /* MOV r0, r15 fetched, STR in Decode */
 334         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_MOV(0, 15), NULL, 0);
 335         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), NULL, 0);
 336         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 337         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 338         /* nothing fetched, STR r0, [r0] in Execute (2) */
 339         arm7tdmi_clock_data_in(jtag_info, pc);
 340
 341         /* use pc-relative LDR to clear r0[1:0] (for switch to ARM mode) */
 342         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_LDR_PCREL(0), NULL, 0);
 343         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 344         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 345         /* nothing fetched, data for LDR r0, [PC, #0] */
 346         arm7tdmi_clock_out(jtag_info, 0x0, NULL, 0);
 347         /* nothing fetched, data from previous cycle is written to register */
 348         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 349
 350         /* fetch BX */
 351         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_BX(0), NULL, 0);
 352         /* NOP fetched, BX in Decode, MOV in Execute */
 353         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 354         /* NOP fetched, BX in Execute (1) */
 355         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 356
 357         jtag_execute_queue();
 358
 359         /* fix program counter:
 360          * MOV r0, r15 was the 4th instruction (+6)
 361          * reading PC in Thumb state gives address of instruction + 4
 362          */
 363         *pc -= 0xa;
 364 }
 365
 366 void arm7tdmi_read_core_regs(target_t *target, u32 mask, u32* core_regs[16])
 367 {
 368         int i;
 369         /* get pointers to arch-specific information */
 370         armv4_5_common_t *armv4_5 = target->arch_info;
 371         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 372         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 373
 374         /* STMIA r0-15, [r0] at debug speed
 375          * register values will start to appear on 4th DCLK
 376          */
 377         arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), NULL, 0);
 378
 379         /* fetch NOP, STM in DECODE stage */
 380         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 381         /* fetch NOP, STM in EXECUTE stage (1st cycle) */
 382         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 383
 384         for (i = 0; i <= 15; i++)
 385         {
 386                 if (mask & (1 << i))
 387                         /* nothing fetched, STM still in EXECUTE (1+i cycle) */
 388                         arm7tdmi_clock_data_in(jtag_info, core_regs[i]);
 389         }
 390 }
 391
 392 void arm7tdmi_read_core_regs_target_buffer(target_t *target, u32 mask, void* buffer, int size)
 393 {
 394         int i;
 395         /* get pointers to arch-specific information */
 396         armv4_5_common_t *armv4_5 = target->arch_info;
 397         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 398         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 399         int be = (target->endianness == TARGET_BIG_ENDIAN) ? 1 : 0;
 400         u32 *buf_u32 = buffer;
 401         u16 *buf_u16 = buffer;
 402         u8 *buf_u8 = buffer;
 403
 404         /* STMIA r0-15, [r0] at debug speed
 405          * register values will start to appear on 4th DCLK
 406          */
 407         arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), NULL, 0);
 408
 409         /* fetch NOP, STM in DECODE stage */
 410         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 411         /* fetch NOP, STM in EXECUTE stage (1st cycle) */
 412         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 413
 414         for (i = 0; i <= 15; i++)
 415         {
 416                 /* nothing fetched, STM still in EXECUTE (1+i cycle), read databus */
 417                 if (mask & (1 << i))
 418                 {
 419                         switch (size)
 420                         {
 421                                 case 4:
 422                                         arm7tdmi_clock_data_in_endianness(jtag_info, buf_u32++, 4, be);
 423                                         break;
 424                                 case 2:
 425                                         arm7tdmi_clock_data_in_endianness(jtag_info, buf_u16++, 2, be);
 426                                         break;
 427                                 case 1:
 428                                         arm7tdmi_clock_data_in_endianness(jtag_info, buf_u8++, 1, be);
 429                                         break;
 430                         }
 431                 }
 432         }
 433 }
 434
 435 void arm7tdmi_read_xpsr(target_t *target, u32 *xpsr, int spsr)
 436 {
 437         /* get pointers to arch-specific information */
 438         armv4_5_common_t *armv4_5 = target->arch_info;
 439         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 440         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 441
 442         /* MRS r0, cpsr */
 443         arm7tdmi_clock_out(jtag_info, ARMV4_5_MRS(0, spsr & 1), NULL, 0);
 444
 445         /* STR r0, [r15] */
 446         arm7tdmi_clock_out(jtag_info, ARMV4_5_STR(0, 15), NULL, 0);
 447         /* fetch NOP, STR in DECODE stage */
 448         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 449         /* fetch NOP, STR in EXECUTE stage (1st cycle) */
 450         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 451         /* nothing fetched, STR still in EXECUTE (2nd cycle) */
 452         arm7tdmi_clock_data_in(jtag_info, xpsr);
 453 }
 454
 455 void arm7tdmi_write_xpsr(target_t *target, u32 xpsr, int spsr)
 456 {
 457         /* get pointers to arch-specific information */
 458         armv4_5_common_t *armv4_5 = target->arch_info;
 459         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 460         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 461
 462         LOG_DEBUG("xpsr: %8.8x, spsr: %i", xpsr, spsr);
 463
 464         /* MSR1 fetched */
 465         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr & 0xff, 0, 1, spsr), NULL, 0);
 466         /* MSR2 fetched, MSR1 in DECODE */
 467         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff00) >> 8, 0xc, 2, spsr), NULL, 0);
 468         /* MSR3 fetched, MSR1 in EXECUTE (1), MSR2 in DECODE */
 469         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff0000) >> 16, 0x8, 4, spsr), NULL, 0);
 470         /* nothing fetched, MSR1 in EXECUTE (2) */
 471         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 472         /* MSR4 fetched, MSR2 in EXECUTE (1), MSR3 in DECODE */
 473         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff000000) >> 24, 0x4, 8, spsr), NULL, 0);
 474         /* nothing fetched, MSR2 in EXECUTE (2) */
 475         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 476         /* NOP fetched, MSR3 in EXECUTE (1), MSR4 in DECODE */
 477         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 478         /* nothing fetched, MSR3 in EXECUTE (2) */
 479         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 480         /* NOP fetched, MSR4 in EXECUTE (1) */
 481         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 482         /* nothing fetched, MSR4 in EXECUTE (2) */
 483         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 484 }
 485
 486 void arm7tdmi_write_xpsr_im8(target_t *target, u8 xpsr_im, int rot, int spsr)
 487 {
 488         /* get pointers to arch-specific information */
 489         armv4_5_common_t *armv4_5 = target->arch_info;
 490         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 491         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 492
 493         LOG_DEBUG("xpsr_im: %2.2x, rot: %i, spsr: %i", xpsr_im, rot, spsr);
 494
 495         /* MSR fetched */
 496         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr_im, rot, 1, spsr), NULL, 0);
 497         /* NOP fetched, MSR in DECODE */
 498         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 499         /* NOP fetched, MSR in EXECUTE (1) */
 500         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 501         /* nothing fetched, MSR in EXECUTE (2) */
 502         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 503 }
 504
 505 void arm7tdmi_write_core_regs(target_t *target, u32 mask, u32 core_regs[16])
 506 {
 507         int i;
 508         /* get pointers to arch-specific information */
 509         armv4_5_common_t *armv4_5 = target->arch_info;
 510         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 511         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 512
 513         /* LDMIA r0-15, [r0] at debug speed
 514         * register values will start to appear on 4th DCLK
 515         */
 516         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 0), NULL, 0);
 517
 518         /* fetch NOP, LDM in DECODE stage */
 519         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 520         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 521         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 522
 523         for (i = 0; i <= 15; i++)
 524         {
 525                 if (mask & (1 << i))
 526                         /* nothing fetched, LDM still in EXECUTE (1+i cycle) */
 527                         arm7tdmi_clock_out_inner(jtag_info, core_regs[i], 0);
 528         }
 529         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 530 }
 531
 532 void arm7tdmi_load_word_regs(target_t *target, u32 mask)
 533 {
 534         /* get pointers to arch-specific information */
 535         armv4_5_common_t *armv4_5 = target->arch_info;
 536         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 537         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 538
 539         /* put system-speed load-multiple into the pipeline */
 540         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 541         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 542         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 1), NULL, 0);
 543 }
 544
 545 void arm7tdmi_load_hword_reg(target_t *target, int num)
 546 {
 547         /* get pointers to arch-specific information */
 548         armv4_5_common_t *armv4_5 = target->arch_info;
 549         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 550         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 551
 552         /* put system-speed load half-word into the pipeline */
 553         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 554         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 555         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDRH_IP(num, 0), NULL, 0);
 556 }
 557
 558 void arm7tdmi_load_byte_reg(target_t *target, int num)
 559 {
 560         /* get pointers to arch-specific information */
 561         armv4_5_common_t *armv4_5 = target->arch_info;
 562         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 563         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 564
 565         /* put system-speed load byte into the pipeline */
 566         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 567         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 568         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDRB_IP(num, 0), NULL, 0);
 569 }
 570
 571 void arm7tdmi_store_word_regs(target_t *target, u32 mask)
 572 {
 573         /* get pointers to arch-specific information */
 574         armv4_5_common_t *armv4_5 = target->arch_info;
 575         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 576         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 577
 578         /* put system-speed store-multiple into the pipeline */
 579         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 580         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 581         arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask, 0, 1), NULL, 0);
 582 }
 583
 584 void arm7tdmi_store_hword_reg(target_t *target, int num)
 585 {
 586         /* get pointers to arch-specific information */
 587         armv4_5_common_t *armv4_5 = target->arch_info;
 588         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 589         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 590
 591         /* put system-speed store half-word into the pipeline */
 592         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 593         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 594         arm7tdmi_clock_out(jtag_info, ARMV4_5_STRH_IP(num, 0), NULL, 0);
 595 }
 596
 597 void arm7tdmi_store_byte_reg(target_t *target, int num)
 598 {
 599         /* get pointers to arch-specific information */
 600         armv4_5_common_t *armv4_5 = target->arch_info;
 601         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 602         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 603
 604         /* put system-speed store byte into the pipeline */
 605         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 606         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 607         arm7tdmi_clock_out(jtag_info, ARMV4_5_STRB_IP(num, 0), NULL, 0);
 608 }
 609
 610 void arm7tdmi_write_pc(target_t *target, u32 pc)
 611 {
 612         /* get pointers to arch-specific information */
 613         armv4_5_common_t *armv4_5 = target->arch_info;
 614         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 615         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 616
 617         /* LDMIA r0-15, [r0] at debug speed
 618          * register values will start to appear on 4th DCLK
 619          */
 620         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x8000, 0, 0), NULL, 0);
 621         /* fetch NOP, LDM in DECODE stage */
 622         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 623         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 624         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 625         /* nothing fetched, LDM in EXECUTE stage (1st cycle) load register */
 626         arm7tdmi_clock_out_inner(jtag_info, pc, 0);
 627         /* nothing fetched, LDM in EXECUTE stage (2nd cycle) load register */
 628         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 629         /* nothing fetched, LDM in EXECUTE stage (3rd cycle) load register */
 630         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 631         /* fetch NOP, LDM in EXECUTE stage (4th cycle) */
 632         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 633         /* fetch NOP, LDM in EXECUTE stage (5th cycle) */
 634         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 635 }
 636
 637 void arm7tdmi_branch_resume(target_t *target)
 638 {
 639         /* get pointers to arch-specific information */
 640         armv4_5_common_t *armv4_5 = target->arch_info;
 641         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 642         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 643
 644         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 645         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_B(0xfffffa, 0), 0);
 646 }
 647
 648 void arm7tdmi_branch_resume_thumb(target_t *target)
 649 {
 650         LOG_DEBUG("-");
 651
 652         /* get pointers to arch-specific information */
 653         armv4_5_common_t *armv4_5 = target->arch_info;
 654         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 655         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 656         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 657
 658         /* LDMIA r0, [r0] at debug speed
 659          * register values will start to appear on 4th DCLK
 660          */
 661         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x1, 0, 0), NULL, 0);
 662
 663         /* fetch NOP, LDM in DECODE stage */
 664         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 665         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 666         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 667         /* nothing fetched, LDM in EXECUTE stage (2nd cycle) */
 668         arm7tdmi_clock_out(jtag_info, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32) | 1, NULL, 0);
 669         /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */
 670         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 671
 672         /* Branch and eXchange */
 673         arm7tdmi_clock_out(jtag_info, ARMV4_5_BX(0), NULL, 0);
 674
 675         embeddedice_read_reg(dbg_stat);
 676
 677         /* fetch NOP, BX in DECODE stage */
 678         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 679
 680         /* target is now in Thumb state */
 681         embeddedice_read_reg(dbg_stat);
 682
 683         /* fetch NOP, BX in EXECUTE stage (1st cycle) */
 684         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 685
 686         /* target is now in Thumb state */
 687         embeddedice_read_reg(dbg_stat);
 688
 689         /* load r0 value */
 690         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_LDR_PCREL(0), NULL, 0);
 691         /* fetch NOP, LDR in Decode */
 692         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 693         /* fetch NOP, LDR in Execute */
 694         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 695         /* nothing fetched, LDR in EXECUTE stage (2nd cycle) */
 696         arm7tdmi_clock_out(jtag_info, buf_get_u32(armv4_5->core_cache->reg_list[0].value, 0, 32), NULL, 0);
 697         /* nothing fetched, LDR in EXECUTE stage (3rd cycle) */
 698         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 699
 700         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 701         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 702
 703         embeddedice_read_reg(dbg_stat);
 704
 705         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 1);
 706         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_B(0x7f8), NULL, 0);
 707 }
 708
 709 void arm7tdmi_build_reg_cache(target_t *target)
 710 {
 711         reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
 712         /* get pointers to arch-specific information */
 713         armv4_5_common_t *armv4_5 = target->arch_info;
 714
 715         (*cache_p) = armv4_5_build_reg_cache(target, armv4_5);
 716         armv4_5->core_cache = (*cache_p);
 717 }
 718
 719 int arm7tdmi_examine(struct target_s *target)
 720 {
 721         int retval;
 722         armv4_5_common_t *armv4_5 = target->arch_info;
 723         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 724         if (!target->type->examined)
 725         {
 726                 /* get pointers to arch-specific information */
 727                 reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
 728                 reg_cache_t *t=embeddedice_build_reg_cache(target, arm7_9);
 729                 if (t==NULL)
 730                         return ERROR_FAIL;
 731
 732                 (*cache_p) = t;
 733                 arm7_9->eice_cache = (*cache_p);
 734
 735                 if (arm7_9->etm_ctx)
 736                 {
 737                         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 738                         (*cache_p)->next = etm_build_reg_cache(target, jtag_info, arm7_9->etm_ctx);
 739                         arm7_9->etm_ctx->reg_cache = (*cache_p)->next;
 740                 }
 741                 target->type->examined = 1;
 742         }
 743         if ((retval=embeddedice_setup(target))!=ERROR_OK)
 744                 return retval;
 745         if ((retval=arm7_9_setup(target))!=ERROR_OK)
 746                 return retval;
 747         if (arm7_9->etm_ctx)
 748         {
 749                 if ((retval=etm_setup(target))!=ERROR_OK)
 750                         return retval;
 751         }
 752         return ERROR_OK;
 753 }
 754
 755 int arm7tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 756 {
 757         arm7tdmi_build_reg_cache(target);
 758
 759         return ERROR_OK;
 760 }
 761
 762 int arm7tdmi_quit(void)
 763 {
 764         return ERROR_OK;
 765 }
 766
 767 int arm7tdmi_init_arch_info(target_t *target, arm7tdmi_common_t *arm7tdmi, jtag_tap_t *tap)
 768 {
 769         armv4_5_common_t *armv4_5;
 770         arm7_9_common_t *arm7_9;
 771
 772         arm7_9 = &arm7tdmi->arm7_9_common;
 773         armv4_5 = &arm7_9->armv4_5_common;
 774
 775         /* prepare JTAG information for the new target */
 776         arm7_9->jtag_info.tap = tap;
 777         arm7_9->jtag_info.scann_size = 4;
 778
 779         /* register arch-specific functions */
 780         arm7_9->examine_debug_reason = arm7tdmi_examine_debug_reason;
 781         arm7_9->change_to_arm = arm7tdmi_change_to_arm;
 782         arm7_9->read_core_regs = arm7tdmi_read_core_regs;
 783         arm7_9->read_core_regs_target_buffer = arm7tdmi_read_core_regs_target_buffer;
 784         arm7_9->read_xpsr = arm7tdmi_read_xpsr;
 785
 786         arm7_9->write_xpsr = arm7tdmi_write_xpsr;
 787         arm7_9->write_xpsr_im8 = arm7tdmi_write_xpsr_im8;
 788         arm7_9->write_core_regs = arm7tdmi_write_core_regs;
 789
 790         arm7_9->load_word_regs = arm7tdmi_load_word_regs;
 791         arm7_9->load_hword_reg = arm7tdmi_load_hword_reg;
 792         arm7_9->load_byte_reg = arm7tdmi_load_byte_reg;
 793
 794         arm7_9->store_word_regs = arm7tdmi_store_word_regs;
 795         arm7_9->store_hword_reg = arm7tdmi_store_hword_reg;
 796         arm7_9->store_byte_reg = arm7tdmi_store_byte_reg;
 797
 798         arm7_9->write_pc = arm7tdmi_write_pc;
 799         arm7_9->branch_resume = arm7tdmi_branch_resume;
 800         arm7_9->branch_resume_thumb = arm7tdmi_branch_resume_thumb;
 801
 802         arm7_9->enable_single_step = arm7_9_enable_eice_step;
 803         arm7_9->disable_single_step = arm7_9_disable_eice_step;
 804
 805         arm7_9->pre_debug_entry = NULL;
 806         arm7_9->post_debug_entry = NULL;
 807
 808         arm7_9->pre_restore_context = NULL;
 809         arm7_9->post_restore_context = NULL;
 810
 811         /* initialize arch-specific breakpoint handling */
 812         arm7_9->arm_bkpt = 0xdeeedeee;
 813         arm7_9->thumb_bkpt = 0xdeee;
 814
 815         arm7_9->dbgreq_adjust_pc = 2;
 816         arm7_9->arch_info = arm7tdmi;
 817
 818         arm7tdmi->arch_info = NULL;
 819         arm7tdmi->common_magic = ARM7TDMI_COMMON_MAGIC;
 820
 821         arm7_9_init_arch_info(target, arm7_9);
 822
 823         return ERROR_OK;
 824 }
 825
 826 int arm7tdmi_target_create( struct target_s *target, Jim_Interp *interp )
 827 {
 828         arm7tdmi_common_t *arm7tdmi;
 829
 830         arm7tdmi = calloc(1,sizeof(arm7tdmi_common_t));
 831         arm7tdmi_init_arch_info(target, arm7tdmi, target->tap);
 832
 833         return ERROR_OK;
 834 }
 835
 836 int arm7tdmi_register_commands(struct command_context_s *cmd_ctx)
 837 {
 838         int retval;
 839
 840         retval = arm7_9_register_commands(cmd_ctx);
 841
 842         return retval;
 843 }