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  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include "arm7tdmi.h"
  28
  29 #include "arm7_9_common.h"
  30 #include "register.h"
  31 #include "target.h"
  32 #include "armv4_5.h"
  33 #include "embeddedice.h"
  34 #include "etm.h"
  35 #include "log.h"
  36 #include "jtag.h"
  37 #include "arm_jtag.h"
  38
  39 #include <stdlib.h>
  40 #include <string.h>
  41
  42 #if 0
  43 #define _DEBUG_INSTRUCTION_EXECUTION_
  44 #endif
  45
  46 /* cli handling */
  47 int arm7tdmi_register_commands(struct command_context_s *cmd_ctx);
  48
  49 /* forward declarations */
  50
  51 int arm7tdmi_target_create(struct target_s *target,Jim_Interp *interp);
  52 int arm7tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  53 int arm7tdmi_quit(void);
  54
  55 /* target function declarations */
  56 int arm7tdmi_poll(struct target_s *target);
  57 int arm7tdmi_halt(target_t *target);
  58
  59 target_type_t arm7tdmi_target =
  60 {
  61         .name = "arm7tdmi",
  62
  63         .poll = arm7_9_poll,
  64         .arch_state = armv4_5_arch_state,
  65
  66         .target_request_data = arm7_9_target_request_data,
  67
  68         .halt = arm7_9_halt,
  69         .resume = arm7_9_resume,
  70         .step = arm7_9_step,
  71
  72         .assert_reset = arm7_9_assert_reset,
  73         .deassert_reset = arm7_9_deassert_reset,
  74         .soft_reset_halt = arm7_9_soft_reset_halt,
  75
  76         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  77
  78         .read_memory = arm7_9_read_memory,
  79         .write_memory = arm7_9_write_memory,
  80         .bulk_write_memory = arm7_9_bulk_write_memory,
  81         .checksum_memory = arm7_9_checksum_memory,
  82         .blank_check_memory = arm7_9_blank_check_memory,
  83
  84         .run_algorithm = armv4_5_run_algorithm,
  85
  86         .add_breakpoint = arm7_9_add_breakpoint,
  87         .remove_breakpoint = arm7_9_remove_breakpoint,
  88         .add_watchpoint = arm7_9_add_watchpoint,
  89         .remove_watchpoint = arm7_9_remove_watchpoint,
  90
  91         .register_commands  = arm7tdmi_register_commands,
  92         .target_create  = arm7tdmi_target_create,
  93         .init_target = arm7tdmi_init_target,
  94         .examine = arm7tdmi_examine,
  95         .quit = arm7tdmi_quit
  96 };
  97
  98 int arm7tdmi_examine_debug_reason(target_t *target)
  99 {
 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_PD);
 113
 114                 fields[0].device = arm7_9->jtag_info.chain_pos;
 115                 fields[0].num_bits = 1;
 116                 fields[0].out_value = NULL;
 117                 fields[0].out_mask = NULL;
 118                 fields[0].in_value = &breakpoint;
 119                 fields[0].in_check_value = NULL;
 120                 fields[0].in_check_mask = NULL;
 121                 fields[0].in_handler = NULL;
 122                 fields[0].in_handler_priv = NULL;
 123
 124                 fields[1].device = arm7_9->jtag_info.chain_pos;
 125                 fields[1].num_bits = 32;
 126                 fields[1].out_value = NULL;
 127                 fields[1].out_mask = NULL;
 128                 fields[1].in_value = databus;
 129                 fields[1].in_check_value = NULL;
 130                 fields[1].in_check_mask = NULL;
 131                 fields[1].in_handler = NULL;
 132                 fields[1].in_handler_priv = NULL;
 133
 134                 arm_jtag_scann(&arm7_9->jtag_info, 0x1);
 135                 arm_jtag_set_instr(&arm7_9->jtag_info, arm7_9->jtag_info.intest_instr, NULL);
 136
 137                 jtag_add_dr_scan(2, fields, TAP_PD);
 138                 jtag_execute_queue();
 139
 140                 fields[0].in_value = NULL;
 141                 fields[0].out_value = &breakpoint;
 142                 fields[1].in_value = NULL;
 143                 fields[1].out_value = databus;
 144
 145                 jtag_add_dr_scan(2, fields, TAP_PD);
 146
 147                 if (breakpoint & 1)
 148                         target->debug_reason = DBG_REASON_WATCHPOINT;
 149                 else
 150                         target->debug_reason = DBG_REASON_BREAKPOINT;
 151         }
 152
 153         return ERROR_OK;
 154 }
 155
 156 static int arm7tdmi_num_bits[]={1, 32};
 157 static __inline int arm7tdmi_clock_out_inner(arm_jtag_t *jtag_info, u32 out, int breakpoint)
 158 {
 159         u32 values[2]={breakpoint, flip_u32(out, 32)};
 160
 161         jtag_add_dr_out(jtag_info->chain_pos,
 162                         2,
 163                         arm7tdmi_num_bits,
 164                         values,
 165                         -1);
 166
 167         jtag_add_runtest(0, -1);
 168
 169         return ERROR_OK;
 170 }
 171
 172 /* put an instruction in the ARM7TDMI pipeline or write the data bus, and optionally read data */
 173 static __inline int arm7tdmi_clock_out(arm_jtag_t *jtag_info, u32 out, u32 *deprecated, int breakpoint)
 174 {
 175         jtag_add_end_state(TAP_PD);
 176         arm_jtag_scann(jtag_info, 0x1);
 177         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 178
 179         return arm7tdmi_clock_out_inner(jtag_info, out, breakpoint);
 180 }
 181
 182 /* clock the target, reading the databus */
 183 int arm7tdmi_clock_data_in(arm_jtag_t *jtag_info, u32 *in)
 184 {
 185         scan_field_t fields[2];
 186
 187         jtag_add_end_state(TAP_PD);
 188         arm_jtag_scann(jtag_info, 0x1);
 189         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 190
 191         fields[0].device = jtag_info->chain_pos;
 192         fields[0].num_bits = 1;
 193         fields[0].out_value = NULL;
 194         fields[0].out_mask = NULL;
 195         fields[0].in_value = NULL;
 196         fields[0].in_check_value = NULL;
 197         fields[0].in_check_mask = NULL;
 198         fields[0].in_handler = NULL;
 199         fields[0].in_handler_priv = NULL;
 200
 201         fields[1].device = jtag_info->chain_pos;
 202         fields[1].num_bits = 32;
 203         fields[1].out_value = NULL;
 204         fields[1].out_mask = NULL;
 205         fields[1].in_value = NULL;
 206         fields[1].in_handler = arm_jtag_buf_to_u32_flip;
 207         fields[1].in_handler_priv = in;
 208         fields[1].in_check_value = NULL;
 209         fields[1].in_check_mask = NULL;
 210
 211         jtag_add_dr_scan(2, fields, -1);
 212
 213         jtag_add_runtest(0, -1);
 214
 215 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 216 {
 217                 jtag_execute_queue();
 218
 219                 if (in)
 220                 {
 221                         LOG_DEBUG("in: 0x%8.8x", *in);
 222                 }
 223                 else
 224                 {
 225                         LOG_ERROR("BUG: called with in == NULL");
 226                 }
 227 }
 228 #endif
 229
 230         return ERROR_OK;
 231 }
 232
 233 /* clock the target, and read the databus
 234  * the *in pointer points to a buffer where elements of 'size' bytes
 235  * are stored in big (be==1) or little (be==0) endianness
 236  */
 237 int arm7tdmi_clock_data_in_endianness(arm_jtag_t *jtag_info, void *in, int size, int be)
 238 {
 239         scan_field_t fields[2];
 240
 241         jtag_add_end_state(TAP_PD);
 242         arm_jtag_scann(jtag_info, 0x1);
 243         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 244
 245         fields[0].device = jtag_info->chain_pos;
 246         fields[0].num_bits = 1;
 247         fields[0].out_value = NULL;
 248         fields[0].out_mask = NULL;
 249         fields[0].in_value = NULL;
 250         fields[0].in_check_value = NULL;
 251         fields[0].in_check_mask = NULL;
 252         fields[0].in_handler = NULL;
 253         fields[0].in_handler_priv = NULL;
 254
 255         fields[1].device = jtag_info->chain_pos;
 256         fields[1].num_bits = 32;
 257         fields[1].out_value = NULL;
 258         fields[1].out_mask = NULL;
 259         fields[1].in_value = NULL;
 260         switch (size)
 261         {
 262                 case 4:
 263                         fields[1].in_handler = (be) ? arm_jtag_buf_to_be32_flip : arm_jtag_buf_to_le32_flip;
 264                         break;
 265                 case 2:
 266                         fields[1].in_handler = (be) ? arm_jtag_buf_to_be16_flip : arm_jtag_buf_to_le16_flip;
 267                         break;
 268                 case 1:
 269                         fields[1].in_handler = arm_jtag_buf_to_8_flip;
 270                         break;
 271         }
 272         fields[1].in_handler_priv = in;
 273         fields[1].in_check_value = NULL;
 274         fields[1].in_check_mask = NULL;
 275
 276         jtag_add_dr_scan(2, fields, -1);
 277
 278         jtag_add_runtest(0, -1);
 279
 280 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 281 {
 282                 jtag_execute_queue();
 283
 284                 if (in)
 285                 {
 286                         LOG_DEBUG("in: 0x%8.8x", *(u32*)in);
 287                 }
 288                 else
 289                 {
 290                         LOG_ERROR("BUG: called with in == NULL");
 291                 }
 292 }
 293 #endif
 294
 295         return ERROR_OK;
 296 }
 297
 298 void arm7tdmi_change_to_arm(target_t *target, u32 *r0, u32 *pc)
 299 {
 300         /* get pointers to arch-specific information */
 301         armv4_5_common_t *armv4_5 = target->arch_info;
 302         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 303         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 304
 305         /* save r0 before using it and put system in ARM state
 306          * to allow common handling of ARM and THUMB debugging */
 307
 308         /* fetch STR r0, [r0] */
 309         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), NULL, 0);
 310         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 311         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 312         /* nothing fetched, STR r0, [r0] in Execute (2) */
 313         arm7tdmi_clock_data_in(jtag_info, r0);
 314
 315         /* MOV r0, r15 fetched, STR in Decode */
 316         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_MOV(0, 15), NULL, 0);
 317         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), NULL, 0);
 318         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 319         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 320         /* nothing fetched, STR r0, [r0] in Execute (2) */
 321         arm7tdmi_clock_data_in(jtag_info, pc);
 322
 323         /* use pc-relative LDR to clear r0[1:0] (for switch to ARM mode) */
 324         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_LDR_PCREL(0), NULL, 0);
 325         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 326         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 327         /* nothing fetched, data for LDR r0, [PC, #0] */
 328         arm7tdmi_clock_out(jtag_info, 0x0, NULL, 0);
 329         /* nothing fetched, data from previous cycle is written to register */
 330         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 331
 332         /* fetch BX */
 333         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_BX(0), NULL, 0);
 334         /* NOP fetched, BX in Decode, MOV in Execute */
 335         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 336         /* NOP fetched, BX in Execute (1) */
 337         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 338
 339         jtag_execute_queue();
 340
 341         /* fix program counter:
 342          * MOV r0, r15 was the 4th instruction (+6)
 343          * reading PC in Thumb state gives address of instruction + 4
 344          */
 345         *pc -= 0xa;
 346
 347 }
 348
 349 void arm7tdmi_read_core_regs(target_t *target, u32 mask, u32* core_regs[16])
 350 {
 351         int i;
 352         /* get pointers to arch-specific information */
 353         armv4_5_common_t *armv4_5 = target->arch_info;
 354         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 355         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 356
 357         /* STMIA r0-15, [r0] at debug speed
 358          * register values will start to appear on 4th DCLK
 359          */
 360         arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), NULL, 0);
 361
 362         /* fetch NOP, STM in DECODE stage */
 363         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 364         /* fetch NOP, STM in EXECUTE stage (1st cycle) */
 365         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 366
 367         for (i = 0; i <= 15; i++)
 368         {
 369                 if (mask & (1 << i))
 370                         /* nothing fetched, STM still in EXECUTE (1+i cycle) */
 371                         arm7tdmi_clock_data_in(jtag_info, core_regs[i]);
 372         }
 373
 374 }
 375
 376 void arm7tdmi_read_core_regs_target_buffer(target_t *target, u32 mask, void* buffer, int size)
 377 {
 378         int i;
 379         /* get pointers to arch-specific information */
 380         armv4_5_common_t *armv4_5 = target->arch_info;
 381         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 382         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 383         int be = (target->endianness == TARGET_BIG_ENDIAN) ? 1 : 0;
 384         u32 *buf_u32 = buffer;
 385         u16 *buf_u16 = buffer;
 386         u8 *buf_u8 = buffer;
 387
 388         /* STMIA r0-15, [r0] at debug speed
 389          * register values will start to appear on 4th DCLK
 390          */
 391         arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), NULL, 0);
 392
 393         /* fetch NOP, STM in DECODE stage */
 394         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 395         /* fetch NOP, STM in EXECUTE stage (1st cycle) */
 396         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 397
 398         for (i = 0; i <= 15; i++)
 399         {
 400                 /* nothing fetched, STM still in EXECUTE (1+i cycle), read databus */
 401                 if (mask & (1 << i))
 402                 {
 403                         switch (size)
 404                         {
 405                                 case 4:
 406                                         arm7tdmi_clock_data_in_endianness(jtag_info, buf_u32++, 4, be);
 407                                         break;
 408                                 case 2:
 409                                         arm7tdmi_clock_data_in_endianness(jtag_info, buf_u16++, 2, be);
 410                                         break;
 411                                 case 1:
 412                                         arm7tdmi_clock_data_in_endianness(jtag_info, buf_u8++, 1, be);
 413                                         break;
 414                         }
 415                 }
 416         }
 417
 418 }
 419
 420 void arm7tdmi_read_xpsr(target_t *target, u32 *xpsr, int spsr)
 421 {
 422         /* get pointers to arch-specific information */
 423         armv4_5_common_t *armv4_5 = target->arch_info;
 424         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 425         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 426
 427         /* MRS r0, cpsr */
 428         arm7tdmi_clock_out(jtag_info, ARMV4_5_MRS(0, spsr & 1), NULL, 0);
 429
 430         /* STR r0, [r15] */
 431         arm7tdmi_clock_out(jtag_info, ARMV4_5_STR(0, 15), NULL, 0);
 432         /* fetch NOP, STR in DECODE stage */
 433         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 434         /* fetch NOP, STR in EXECUTE stage (1st cycle) */
 435         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 436         /* nothing fetched, STR still in EXECUTE (2nd cycle) */
 437         arm7tdmi_clock_data_in(jtag_info, xpsr);
 438
 439 }
 440
 441 void arm7tdmi_write_xpsr(target_t *target, u32 xpsr, int spsr)
 442 {
 443         /* get pointers to arch-specific information */
 444         armv4_5_common_t *armv4_5 = target->arch_info;
 445         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 446         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 447
 448         LOG_DEBUG("xpsr: %8.8x, spsr: %i", xpsr, spsr);
 449
 450         /* MSR1 fetched */
 451         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr & 0xff, 0, 1, spsr), NULL, 0);
 452         /* MSR2 fetched, MSR1 in DECODE */
 453         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff00) >> 8, 0xc, 2, spsr), NULL, 0);
 454         /* MSR3 fetched, MSR1 in EXECUTE (1), MSR2 in DECODE */
 455         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff0000) >> 16, 0x8, 4, spsr), NULL, 0);
 456         /* nothing fetched, MSR1 in EXECUTE (2) */
 457         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 458         /* MSR4 fetched, MSR2 in EXECUTE (1), MSR3 in DECODE */
 459         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff000000) >> 24, 0x4, 8, spsr), NULL, 0);
 460         /* nothing fetched, MSR2 in EXECUTE (2) */
 461         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 462         /* NOP fetched, MSR3 in EXECUTE (1), MSR4 in DECODE */
 463         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 464         /* nothing fetched, MSR3 in EXECUTE (2) */
 465         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 466         /* NOP fetched, MSR4 in EXECUTE (1) */
 467         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 468         /* nothing fetched, MSR4 in EXECUTE (2) */
 469         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 470 }
 471
 472 void arm7tdmi_write_xpsr_im8(target_t *target, u8 xpsr_im, int rot, int spsr)
 473 {
 474         /* get pointers to arch-specific information */
 475         armv4_5_common_t *armv4_5 = target->arch_info;
 476         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 477         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 478
 479         LOG_DEBUG("xpsr_im: %2.2x, rot: %i, spsr: %i", xpsr_im, rot, spsr);
 480
 481         /* MSR fetched */
 482         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr_im, rot, 1, spsr), NULL, 0);
 483         /* NOP fetched, MSR in DECODE */
 484         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 485         /* NOP fetched, MSR in EXECUTE (1) */
 486         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 487         /* nothing fetched, MSR in EXECUTE (2) */
 488         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 489
 490 }
 491
 492 void arm7tdmi_write_core_regs(target_t *target, u32 mask, u32 core_regs[16])
 493 {
 494         int i;
 495         /* get pointers to arch-specific information */
 496         armv4_5_common_t *armv4_5 = target->arch_info;
 497         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 498         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 499
 500         /* LDMIA r0-15, [r0] at debug speed
 501         * register values will start to appear on 4th DCLK
 502         */
 503         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 0), NULL, 0);
 504
 505         /* fetch NOP, LDM in DECODE stage */
 506         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 507         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 508         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 509
 510         for (i = 0; i <= 15; i++)
 511         {
 512                 if (mask & (1 << i))
 513                         /* nothing fetched, LDM still in EXECUTE (1+i cycle) */
 514                         arm7tdmi_clock_out_inner(jtag_info, core_regs[i], 0);
 515         }
 516         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 517
 518 }
 519
 520 void arm7tdmi_load_word_regs(target_t *target, u32 mask)
 521 {
 522         /* get pointers to arch-specific information */
 523         armv4_5_common_t *armv4_5 = target->arch_info;
 524         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 525         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 526
 527         /* put system-speed load-multiple into the pipeline */
 528         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 529         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 530         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 1), NULL, 0);
 531
 532 }
 533
 534 void arm7tdmi_load_hword_reg(target_t *target, int num)
 535 {
 536         /* get pointers to arch-specific information */
 537         armv4_5_common_t *armv4_5 = target->arch_info;
 538         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 539         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 540
 541         /* put system-speed load half-word into the pipeline */
 542         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 543         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 544         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDRH_IP(num, 0), NULL, 0);
 545
 546 }
 547
 548 void arm7tdmi_load_byte_reg(target_t *target, int num)
 549 {
 550         /* get pointers to arch-specific information */
 551         armv4_5_common_t *armv4_5 = target->arch_info;
 552         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 553         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 554
 555         /* put system-speed load byte into the pipeline */
 556         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 557         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 558         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDRB_IP(num, 0), NULL, 0);
 559
 560 }
 561
 562 void arm7tdmi_store_word_regs(target_t *target, u32 mask)
 563 {
 564         /* get pointers to arch-specific information */
 565         armv4_5_common_t *armv4_5 = target->arch_info;
 566         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 567         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 568
 569         /* put system-speed store-multiple into the pipeline */
 570         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 571         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 572         arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask, 0, 1), NULL, 0);
 573
 574 }
 575
 576 void arm7tdmi_store_hword_reg(target_t *target, int num)
 577 {
 578         /* get pointers to arch-specific information */
 579         armv4_5_common_t *armv4_5 = target->arch_info;
 580         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 581         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 582
 583         /* put system-speed store half-word into the pipeline */
 584         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 585         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 586         arm7tdmi_clock_out(jtag_info, ARMV4_5_STRH_IP(num, 0), NULL, 0);
 587
 588 }
 589
 590 void arm7tdmi_store_byte_reg(target_t *target, int num)
 591 {
 592         /* get pointers to arch-specific information */
 593         armv4_5_common_t *armv4_5 = target->arch_info;
 594         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 595         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 596
 597         /* put system-speed store byte into the pipeline */
 598         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 599         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 600         arm7tdmi_clock_out(jtag_info, ARMV4_5_STRB_IP(num, 0), NULL, 0);
 601
 602 }
 603
 604 void arm7tdmi_write_pc(target_t *target, u32 pc)
 605 {
 606         /* get pointers to arch-specific information */
 607         armv4_5_common_t *armv4_5 = target->arch_info;
 608         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 609         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 610
 611         /* LDMIA r0-15, [r0] at debug speed
 612          * register values will start to appear on 4th DCLK
 613          */
 614         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x8000, 0, 0), NULL, 0);
 615         /* fetch NOP, LDM in DECODE stage */
 616         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 617         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 618         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 619         /* nothing fetched, LDM in EXECUTE stage (1st cycle) load register */
 620         arm7tdmi_clock_out_inner(jtag_info, pc, 0);
 621         /* nothing fetched, LDM in EXECUTE stage (2nd cycle) load register */
 622         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 623         /* nothing fetched, LDM in EXECUTE stage (3rd cycle) load register */
 624         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 625         /* fetch NOP, LDM in EXECUTE stage (4th cycle) */
 626         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 627         /* fetch NOP, LDM in EXECUTE stage (5th cycle) */
 628         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 629 }
 630
 631 void arm7tdmi_branch_resume(target_t *target)
 632 {
 633         /* get pointers to arch-specific information */
 634         armv4_5_common_t *armv4_5 = target->arch_info;
 635         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 636         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 637
 638         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 639         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_B(0xfffffa, 0), 0);
 640
 641 }
 642
 643 void arm7tdmi_branch_resume_thumb(target_t *target)
 644 {
 645         LOG_DEBUG("-");
 646
 647         /* get pointers to arch-specific information */
 648         armv4_5_common_t *armv4_5 = target->arch_info;
 649         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 650         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 651         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 652
 653         /* LDMIA r0, [r0] at debug speed
 654          * register values will start to appear on 4th DCLK
 655          */
 656         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x1, 0, 0), NULL, 0);
 657
 658         /* fetch NOP, LDM in DECODE stage */
 659         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 660         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 661         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 662         /* nothing fetched, LDM in EXECUTE stage (2nd cycle) */
 663         arm7tdmi_clock_out(jtag_info, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32) | 1, NULL, 0);
 664         /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */
 665         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 666
 667         /* Branch and eXchange */
 668         arm7tdmi_clock_out(jtag_info, ARMV4_5_BX(0), NULL, 0);
 669
 670         embeddedice_read_reg(dbg_stat);
 671
 672         /* fetch NOP, BX in DECODE stage */
 673         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 674
 675         /* target is now in Thumb state */
 676         embeddedice_read_reg(dbg_stat);
 677
 678         /* fetch NOP, BX in EXECUTE stage (1st cycle) */
 679         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 680
 681         /* target is now in Thumb state */
 682         embeddedice_read_reg(dbg_stat);
 683
 684         /* load r0 value */
 685         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_LDR_PCREL(0), NULL, 0);
 686         /* fetch NOP, LDR in Decode */
 687         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 688         /* fetch NOP, LDR in Execute */
 689         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 690         /* nothing fetched, LDR in EXECUTE stage (2nd cycle) */
 691         arm7tdmi_clock_out(jtag_info, buf_get_u32(armv4_5->core_cache->reg_list[0].value, 0, 32), NULL, 0);
 692         /* nothing fetched, LDR in EXECUTE stage (3rd cycle) */
 693         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 694
 695         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 696         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 697
 698         embeddedice_read_reg(dbg_stat);
 699
 700         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 1);
 701         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_B(0x7f8), NULL, 0);
 702
 703 }
 704
 705 void arm7tdmi_build_reg_cache(target_t *target)
 706 {
 707         reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
 708         /* get pointers to arch-specific information */
 709         armv4_5_common_t *armv4_5 = target->arch_info;
 710
 711         (*cache_p) = armv4_5_build_reg_cache(target, armv4_5);
 712         armv4_5->core_cache = (*cache_p);
 713 }
 714
 715 int arm7tdmi_examine(struct target_s *target)
 716 {
 717         int retval;
 718         armv4_5_common_t *armv4_5 = target->arch_info;
 719         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 720         if (!target->type->examined)
 721         {
 722                 /* get pointers to arch-specific information */
 723                 reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
 724                 reg_cache_t *t=embeddedice_build_reg_cache(target, arm7_9);
 725                 if (t==NULL)
 726                         return ERROR_FAIL;
 727
 728                 (*cache_p) = t;
 729                 arm7_9->eice_cache = (*cache_p);
 730
 731                 if (arm7_9->etm_ctx)
 732                 {
 733                         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 734                         (*cache_p)->next = etm_build_reg_cache(target, jtag_info, arm7_9->etm_ctx);
 735                         arm7_9->etm_ctx->reg_cache = (*cache_p)->next;
 736                 }
 737                 target->type->examined = 1;
 738         }
 739         if ((retval=embeddedice_setup(target))!=ERROR_OK)
 740                 return retval;
 741         if ((retval=arm7_9_setup(target))!=ERROR_OK)
 742                 return retval;
 743         if (arm7_9->etm_ctx)
 744         {
 745                 if ((retval=etm_setup(target))!=ERROR_OK)
 746                         return retval;
 747         }
 748         return ERROR_OK;
 749 }
 750
 751 int arm7tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 752 {
 753
 754         arm7tdmi_build_reg_cache(target);
 755
 756         return ERROR_OK;
 757
 758 }
 759
 760 int arm7tdmi_quit(void)
 761 {
 762
 763         return ERROR_OK;
 764 }
 765
 766 int arm7tdmi_init_arch_info(target_t *target, arm7tdmi_common_t *arm7tdmi, int chain_pos, const char *variant)
 767 {
 768         armv4_5_common_t *armv4_5;
 769         arm7_9_common_t *arm7_9;
 770
 771         arm7_9 = &arm7tdmi->arm7_9_common;
 772         armv4_5 = &arm7_9->armv4_5_common;
 773
 774         /* prepare JTAG information for the new target */
 775         arm7_9->jtag_info.chain_pos = chain_pos;
 776         arm7_9->jtag_info.scann_size = 4;
 777
 778         /* register arch-specific functions */
 779         arm7_9->examine_debug_reason = arm7tdmi_examine_debug_reason;
 780         arm7_9->change_to_arm = arm7tdmi_change_to_arm;
 781         arm7_9->read_core_regs = arm7tdmi_read_core_regs;
 782         arm7_9->read_core_regs_target_buffer = arm7tdmi_read_core_regs_target_buffer;
 783         arm7_9->read_xpsr = arm7tdmi_read_xpsr;
 784
 785         arm7_9->write_xpsr = arm7tdmi_write_xpsr;
 786         arm7_9->write_xpsr_im8 = arm7tdmi_write_xpsr_im8;
 787         arm7_9->write_core_regs = arm7tdmi_write_core_regs;
 788
 789         arm7_9->load_word_regs = arm7tdmi_load_word_regs;
 790         arm7_9->load_hword_reg = arm7tdmi_load_hword_reg;
 791         arm7_9->load_byte_reg = arm7tdmi_load_byte_reg;
 792
 793         arm7_9->store_word_regs = arm7tdmi_store_word_regs;
 794         arm7_9->store_hword_reg = arm7tdmi_store_hword_reg;
 795         arm7_9->store_byte_reg = arm7tdmi_store_byte_reg;
 796
 797         arm7_9->write_pc = arm7tdmi_write_pc;
 798         arm7_9->branch_resume = arm7tdmi_branch_resume;
 799         arm7_9->branch_resume_thumb = arm7tdmi_branch_resume_thumb;
 800
 801         arm7_9->enable_single_step = arm7_9_enable_eice_step;
 802         arm7_9->disable_single_step = arm7_9_disable_eice_step;
 803
 804         arm7_9->pre_debug_entry = NULL;
 805         arm7_9->post_debug_entry = NULL;
 806
 807         arm7_9->pre_restore_context = NULL;
 808         arm7_9->post_restore_context = NULL;
 809
 810         /* initialize arch-specific breakpoint handling */
 811         arm7_9->arm_bkpt = 0xdeeedeee;
 812         arm7_9->thumb_bkpt = 0xdeee;
 813
 814         arm7_9->dbgreq_adjust_pc = 2;
 815         arm7_9->arch_info = arm7tdmi;
 816
 817         arm7tdmi->arch_info = NULL;
 818         arm7tdmi->common_magic = ARM7TDMI_COMMON_MAGIC;
 819
 820         if (variant)
 821         {
 822                 arm7tdmi->variant = strdup(variant);
 823         }
 824         else
 825         {
 826                 arm7tdmi->variant = strdup("");
 827         }
 828
 829         arm7_9_init_arch_info(target, arm7_9);
 830
 831         return ERROR_OK;
 832 }
 833
 834
 835
 836 int arm7tdmi_target_create( struct target_s *target, Jim_Interp *interp )
 837 {
 838         arm7tdmi_common_t *arm7tdmi;
 839
 840         arm7tdmi = calloc(1,sizeof(arm7tdmi_common_t));
 841
 842         arm7tdmi_init_arch_info(target, arm7tdmi, target->chain_position, target->variant);
 843
 844         return ERROR_OK;
 845 }
 846
 847
 848 int arm7tdmi_register_commands(struct command_context_s *cmd_ctx)
 849 {
 850         int retval;
 851
 852         retval = arm7_9_register_commands(cmd_ctx);
 853
 854         return ERROR_OK;
 855
 856 }