src/target/arm7tdmi.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "arm7tdmi.h"
  25
  26 #include "arm7_9_common.h"
  27 #include "register.h"
  28 #include "target.h"
  29 #include "armv4_5.h"
  30 #include "embeddedice.h"
  31 #include "etm.h"
  32 #include "log.h"
  33 #include "jtag.h"
  34 #include "arm_jtag.h"
  35
  36 #include <stdlib.h>
  37 #include <string.h>
  38
  39 #if 0
  40 #define _DEBUG_INSTRUCTION_EXECUTION_
  41 #endif
  42
  43 /* cli handling */
  44 int arm7tdmi_register_commands(struct command_context_s *cmd_ctx);
  45
  46 /* forward declarations */
  47
  48 int arm7tdmi_target_create(struct target_s *target,Jim_Interp *interp);
  49 int arm7tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  50 int arm7tdmi_quit(void);
  51
  52 /* target function declarations */
  53 int arm7tdmi_poll(struct target_s *target);
  54 int arm7tdmi_halt(target_t *target);
  55
  56 target_type_t arm7tdmi_target =
  57 {
  58         .name = "arm7tdmi",
  59
  60         .poll = arm7_9_poll,
  61         .arch_state = armv4_5_arch_state,
  62
  63         .target_request_data = arm7_9_target_request_data,
  64
  65         .halt = arm7_9_halt,
  66         .resume = arm7_9_resume,
  67         .step = arm7_9_step,
  68
  69         .assert_reset = arm7_9_assert_reset,
  70         .deassert_reset = arm7_9_deassert_reset,
  71         .soft_reset_halt = arm7_9_soft_reset_halt,
  72
  73         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  74
  75         .read_memory = arm7_9_read_memory,
  76         .write_memory = arm7_9_write_memory,
  77         .bulk_write_memory = arm7_9_bulk_write_memory,
  78         .checksum_memory = arm7_9_checksum_memory,
  79         .blank_check_memory = arm7_9_blank_check_memory,
  80
  81         .run_algorithm = armv4_5_run_algorithm,
  82
  83         .add_breakpoint = arm7_9_add_breakpoint,
  84         .remove_breakpoint = arm7_9_remove_breakpoint,
  85         .add_watchpoint = arm7_9_add_watchpoint,
  86         .remove_watchpoint = arm7_9_remove_watchpoint,
  87
  88         .register_commands  = arm7tdmi_register_commands,
  89         .target_create  = arm7tdmi_target_create,
  90         .init_target = arm7tdmi_init_target,
  91         .examine = arm7tdmi_examine,
  92         .quit = arm7tdmi_quit
  93 };
  94
  95 int arm7tdmi_examine_debug_reason(target_t *target)
  96 {
  97         /* get pointers to arch-specific information */
  98         armv4_5_common_t *armv4_5 = target->arch_info;
  99         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 100
 101         /* only check the debug reason if we don't know it already */
 102         if ((target->debug_reason != DBG_REASON_DBGRQ)
 103                         && (target->debug_reason != DBG_REASON_SINGLESTEP))
 104         {
 105                 scan_field_t fields[2];
 106                 u8 databus[4];
 107                 u8 breakpoint;
 108
 109                 jtag_add_end_state(TAP_PD);
 110
 111                 fields[0].device = arm7_9->jtag_info.chain_pos;
 112                 fields[0].num_bits = 1;
 113                 fields[0].out_value = NULL;
 114                 fields[0].out_mask = NULL;
 115                 fields[0].in_value = &breakpoint;
 116                 fields[0].in_check_value = NULL;
 117                 fields[0].in_check_mask = NULL;
 118                 fields[0].in_handler = NULL;
 119                 fields[0].in_handler_priv = NULL;
 120
 121                 fields[1].device = arm7_9->jtag_info.chain_pos;
 122                 fields[1].num_bits = 32;
 123                 fields[1].out_value = NULL;
 124                 fields[1].out_mask = NULL;
 125                 fields[1].in_value = databus;
 126                 fields[1].in_check_value = NULL;
 127                 fields[1].in_check_mask = NULL;
 128                 fields[1].in_handler = NULL;
 129                 fields[1].in_handler_priv = NULL;
 130
 131                 arm_jtag_scann(&arm7_9->jtag_info, 0x1);
 132                 arm_jtag_set_instr(&arm7_9->jtag_info, arm7_9->jtag_info.intest_instr, NULL);
 133
 134                 jtag_add_dr_scan(2, fields, TAP_PD);
 135                 jtag_execute_queue();
 136
 137                 fields[0].in_value = NULL;
 138                 fields[0].out_value = &breakpoint;
 139                 fields[1].in_value = NULL;
 140                 fields[1].out_value = databus;
 141
 142                 jtag_add_dr_scan(2, fields, TAP_PD);
 143
 144                 if (breakpoint & 1)
 145                         target->debug_reason = DBG_REASON_WATCHPOINT;
 146                 else
 147                         target->debug_reason = DBG_REASON_BREAKPOINT;
 148         }
 149
 150         return ERROR_OK;
 151 }
 152
 153 static int arm7tdmi_num_bits[]={1, 32};
 154 static __inline int arm7tdmi_clock_out_inner(arm_jtag_t *jtag_info, u32 out, int breakpoint)
 155 {
 156         u32 values[2]={breakpoint, flip_u32(out, 32)};
 157
 158         jtag_add_dr_out(jtag_info->chain_pos,
 159                         2,
 160                         arm7tdmi_num_bits,
 161                         values,
 162                         -1);
 163
 164         jtag_add_runtest(0, -1);
 165
 166         return ERROR_OK;
 167 }
 168
 169 /* put an instruction in the ARM7TDMI pipeline or write the data bus, and optionally read data */
 170 static __inline int arm7tdmi_clock_out(arm_jtag_t *jtag_info, u32 out, u32 *deprecated, int breakpoint)
 171 {
 172         jtag_add_end_state(TAP_PD);
 173         arm_jtag_scann(jtag_info, 0x1);
 174         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 175
 176         return arm7tdmi_clock_out_inner(jtag_info, out, breakpoint);
 177 }
 178
 179 /* clock the target, reading the databus */
 180 int arm7tdmi_clock_data_in(arm_jtag_t *jtag_info, u32 *in)
 181 {
 182         scan_field_t fields[2];
 183
 184         jtag_add_end_state(TAP_PD);
 185         arm_jtag_scann(jtag_info, 0x1);
 186         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 187
 188         fields[0].device = jtag_info->chain_pos;
 189         fields[0].num_bits = 1;
 190         fields[0].out_value = NULL;
 191         fields[0].out_mask = NULL;
 192         fields[0].in_value = NULL;
 193         fields[0].in_check_value = NULL;
 194         fields[0].in_check_mask = NULL;
 195         fields[0].in_handler = NULL;
 196         fields[0].in_handler_priv = NULL;
 197
 198         fields[1].device = jtag_info->chain_pos;
 199         fields[1].num_bits = 32;
 200         fields[1].out_value = NULL;
 201         fields[1].out_mask = NULL;
 202         fields[1].in_value = NULL;
 203         fields[1].in_handler = arm_jtag_buf_to_u32_flip;
 204         fields[1].in_handler_priv = in;
 205         fields[1].in_check_value = NULL;
 206         fields[1].in_check_mask = NULL;
 207
 208         jtag_add_dr_scan(2, fields, -1);
 209
 210         jtag_add_runtest(0, -1);
 211
 212 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 213 {
 214                 jtag_execute_queue();
 215
 216                 if (in)
 217                 {
 218                         LOG_DEBUG("in: 0x%8.8x", *in);
 219                 }
 220                 else
 221                 {
 222                         LOG_ERROR("BUG: called with in == NULL");
 223                 }
 224 }
 225 #endif
 226
 227         return ERROR_OK;
 228 }
 229
 230 /* clock the target, and read the databus
 231  * the *in pointer points to a buffer where elements of 'size' bytes
 232  * are stored in big (be==1) or little (be==0) endianness
 233  */
 234 int arm7tdmi_clock_data_in_endianness(arm_jtag_t *jtag_info, void *in, int size, int be)
 235 {
 236         scan_field_t fields[2];
 237
 238         jtag_add_end_state(TAP_PD);
 239         arm_jtag_scann(jtag_info, 0x1);
 240         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 241
 242         fields[0].device = jtag_info->chain_pos;
 243         fields[0].num_bits = 1;
 244         fields[0].out_value = NULL;
 245         fields[0].out_mask = NULL;
 246         fields[0].in_value = NULL;
 247         fields[0].in_check_value = NULL;
 248         fields[0].in_check_mask = NULL;
 249         fields[0].in_handler = NULL;
 250         fields[0].in_handler_priv = NULL;
 251
 252         fields[1].device = jtag_info->chain_pos;
 253         fields[1].num_bits = 32;
 254         fields[1].out_value = NULL;
 255         fields[1].out_mask = NULL;
 256         fields[1].in_value = NULL;
 257         switch (size)
 258         {
 259                 case 4:
 260                         fields[1].in_handler = (be) ? arm_jtag_buf_to_be32_flip : arm_jtag_buf_to_le32_flip;
 261                         break;
 262                 case 2:
 263                         fields[1].in_handler = (be) ? arm_jtag_buf_to_be16_flip : arm_jtag_buf_to_le16_flip;
 264                         break;
 265                 case 1:
 266                         fields[1].in_handler = arm_jtag_buf_to_8_flip;
 267                         break;
 268         }
 269         fields[1].in_handler_priv = in;
 270         fields[1].in_check_value = NULL;
 271         fields[1].in_check_mask = NULL;
 272
 273         jtag_add_dr_scan(2, fields, -1);
 274
 275         jtag_add_runtest(0, -1);
 276
 277 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 278 {
 279                 jtag_execute_queue();
 280
 281                 if (in)
 282                 {
 283                         LOG_DEBUG("in: 0x%8.8x", *(u32*)in);
 284                 }
 285                 else
 286                 {
 287                         LOG_ERROR("BUG: called with in == NULL");
 288                 }
 289 }
 290 #endif
 291
 292         return ERROR_OK;
 293 }
 294
 295 void arm7tdmi_change_to_arm(target_t *target, u32 *r0, u32 *pc)
 296 {
 297         /* get pointers to arch-specific information */
 298         armv4_5_common_t *armv4_5 = target->arch_info;
 299         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 300         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 301
 302         /* save r0 before using it and put system in ARM state
 303          * to allow common handling of ARM and THUMB debugging */
 304
 305         /* fetch STR r0, [r0] */
 306         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), NULL, 0);
 307         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 308         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 309         /* nothing fetched, STR r0, [r0] in Execute (2) */
 310         arm7tdmi_clock_data_in(jtag_info, r0);
 311
 312         /* MOV r0, r15 fetched, STR in Decode */
 313         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_MOV(0, 15), NULL, 0);
 314         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), NULL, 0);
 315         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 316         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 317         /* nothing fetched, STR r0, [r0] in Execute (2) */
 318         arm7tdmi_clock_data_in(jtag_info, pc);
 319
 320         /* use pc-relative LDR to clear r0[1:0] (for switch to ARM mode) */
 321         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_LDR_PCREL(0), NULL, 0);
 322         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 323         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 324         /* nothing fetched, data for LDR r0, [PC, #0] */
 325         arm7tdmi_clock_out(jtag_info, 0x0, NULL, 0);
 326         /* nothing fetched, data from previous cycle is written to register */
 327         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 328
 329         /* fetch BX */
 330         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_BX(0), NULL, 0);
 331         /* NOP fetched, BX in Decode, MOV in Execute */
 332         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 333         /* NOP fetched, BX in Execute (1) */
 334         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 335
 336         jtag_execute_queue();
 337
 338         /* fix program counter:
 339          * MOV r0, r15 was the 4th instruction (+6)
 340          * reading PC in Thumb state gives address of instruction + 4
 341          */
 342         *pc -= 0xa;
 343
 344 }
 345
 346 void arm7tdmi_read_core_regs(target_t *target, u32 mask, u32* core_regs[16])
 347 {
 348         int i;
 349         /* get pointers to arch-specific information */
 350         armv4_5_common_t *armv4_5 = target->arch_info;
 351         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 352         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 353
 354         /* STMIA r0-15, [r0] at debug speed
 355          * register values will start to appear on 4th DCLK
 356          */
 357         arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), NULL, 0);
 358
 359         /* fetch NOP, STM in DECODE stage */
 360         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 361         /* fetch NOP, STM in EXECUTE stage (1st cycle) */
 362         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 363
 364         for (i = 0; i <= 15; i++)
 365         {
 366                 if (mask & (1 << i))
 367                         /* nothing fetched, STM still in EXECUTE (1+i cycle) */
 368                         arm7tdmi_clock_data_in(jtag_info, core_regs[i]);
 369         }
 370
 371 }
 372
 373 void arm7tdmi_read_core_regs_target_buffer(target_t *target, u32 mask, void* buffer, int size)
 374 {
 375         int i;
 376         /* get pointers to arch-specific information */
 377         armv4_5_common_t *armv4_5 = target->arch_info;
 378         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 379         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 380         int be = (target->endianness == TARGET_BIG_ENDIAN) ? 1 : 0;
 381         u32 *buf_u32 = buffer;
 382         u16 *buf_u16 = buffer;
 383         u8 *buf_u8 = buffer;
 384
 385         /* STMIA r0-15, [r0] at debug speed
 386          * register values will start to appear on 4th DCLK
 387          */
 388         arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), NULL, 0);
 389
 390         /* fetch NOP, STM in DECODE stage */
 391         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 392         /* fetch NOP, STM in EXECUTE stage (1st cycle) */
 393         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 394
 395         for (i = 0; i <= 15; i++)
 396         {
 397                 /* nothing fetched, STM still in EXECUTE (1+i cycle), read databus */
 398                 if (mask & (1 << i))
 399                 {
 400                         switch (size)
 401                         {
 402                                 case 4:
 403                                         arm7tdmi_clock_data_in_endianness(jtag_info, buf_u32++, 4, be);
 404                                         break;
 405                                 case 2:
 406                                         arm7tdmi_clock_data_in_endianness(jtag_info, buf_u16++, 2, be);
 407                                         break;
 408                                 case 1:
 409                                         arm7tdmi_clock_data_in_endianness(jtag_info, buf_u8++, 1, be);
 410                                         break;
 411                         }
 412                 }
 413         }
 414
 415 }
 416
 417 void arm7tdmi_read_xpsr(target_t *target, u32 *xpsr, int spsr)
 418 {
 419         /* get pointers to arch-specific information */
 420         armv4_5_common_t *armv4_5 = target->arch_info;
 421         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 422         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 423
 424         /* MRS r0, cpsr */
 425         arm7tdmi_clock_out(jtag_info, ARMV4_5_MRS(0, spsr & 1), NULL, 0);
 426
 427         /* STR r0, [r15] */
 428         arm7tdmi_clock_out(jtag_info, ARMV4_5_STR(0, 15), NULL, 0);
 429         /* fetch NOP, STR in DECODE stage */
 430         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 431         /* fetch NOP, STR in EXECUTE stage (1st cycle) */
 432         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 433         /* nothing fetched, STR still in EXECUTE (2nd cycle) */
 434         arm7tdmi_clock_data_in(jtag_info, xpsr);
 435
 436 }
 437
 438 void arm7tdmi_write_xpsr(target_t *target, u32 xpsr, int spsr)
 439 {
 440         /* get pointers to arch-specific information */
 441         armv4_5_common_t *armv4_5 = target->arch_info;
 442         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 443         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 444
 445         LOG_DEBUG("xpsr: %8.8x, spsr: %i", xpsr, spsr);
 446
 447         /* MSR1 fetched */
 448         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr & 0xff, 0, 1, spsr), NULL, 0);
 449         /* MSR2 fetched, MSR1 in DECODE */
 450         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff00) >> 8, 0xc, 2, spsr), NULL, 0);
 451         /* MSR3 fetched, MSR1 in EXECUTE (1), MSR2 in DECODE */
 452         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff0000) >> 16, 0x8, 4, spsr), NULL, 0);
 453         /* nothing fetched, MSR1 in EXECUTE (2) */
 454         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 455         /* MSR4 fetched, MSR2 in EXECUTE (1), MSR3 in DECODE */
 456         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff000000) >> 24, 0x4, 8, spsr), NULL, 0);
 457         /* nothing fetched, MSR2 in EXECUTE (2) */
 458         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 459         /* NOP fetched, MSR3 in EXECUTE (1), MSR4 in DECODE */
 460         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 461         /* nothing fetched, MSR3 in EXECUTE (2) */
 462         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 463         /* NOP fetched, MSR4 in EXECUTE (1) */
 464         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 465         /* nothing fetched, MSR4 in EXECUTE (2) */
 466         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 467 }
 468
 469 void arm7tdmi_write_xpsr_im8(target_t *target, u8 xpsr_im, int rot, int spsr)
 470 {
 471         /* get pointers to arch-specific information */
 472         armv4_5_common_t *armv4_5 = target->arch_info;
 473         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 474         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 475
 476         LOG_DEBUG("xpsr_im: %2.2x, rot: %i, spsr: %i", xpsr_im, rot, spsr);
 477
 478         /* MSR fetched */
 479         arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr_im, rot, 1, spsr), NULL, 0);
 480         /* NOP fetched, MSR in DECODE */
 481         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 482         /* NOP fetched, MSR in EXECUTE (1) */
 483         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 484         /* nothing fetched, MSR in EXECUTE (2) */
 485         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 486
 487 }
 488
 489 void arm7tdmi_write_core_regs(target_t *target, u32 mask, u32 core_regs[16])
 490 {
 491         int i;
 492         /* get pointers to arch-specific information */
 493         armv4_5_common_t *armv4_5 = target->arch_info;
 494         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 495         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 496
 497         /* LDMIA r0-15, [r0] at debug speed
 498         * register values will start to appear on 4th DCLK
 499         */
 500         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 0), NULL, 0);
 501
 502         /* fetch NOP, LDM in DECODE stage */
 503         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 504         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 505         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 506
 507         for (i = 0; i <= 15; i++)
 508         {
 509                 if (mask & (1 << i))
 510                         /* nothing fetched, LDM still in EXECUTE (1+i cycle) */
 511                         arm7tdmi_clock_out_inner(jtag_info, core_regs[i], 0);
 512         }
 513         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 514
 515 }
 516
 517 void arm7tdmi_load_word_regs(target_t *target, u32 mask)
 518 {
 519         /* get pointers to arch-specific information */
 520         armv4_5_common_t *armv4_5 = target->arch_info;
 521         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 522         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 523
 524         /* put system-speed load-multiple into the pipeline */
 525         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 526         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 527         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 1), NULL, 0);
 528
 529 }
 530
 531 void arm7tdmi_load_hword_reg(target_t *target, int num)
 532 {
 533         /* get pointers to arch-specific information */
 534         armv4_5_common_t *armv4_5 = target->arch_info;
 535         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 536         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 537
 538         /* put system-speed load half-word into the pipeline */
 539         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 540         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 541         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDRH_IP(num, 0), NULL, 0);
 542
 543 }
 544
 545 void arm7tdmi_load_byte_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 byte 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_LDRB_IP(num, 0), NULL, 0);
 556
 557 }
 558
 559 void arm7tdmi_store_word_regs(target_t *target, u32 mask)
 560 {
 561         /* get pointers to arch-specific information */
 562         armv4_5_common_t *armv4_5 = target->arch_info;
 563         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 564         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 565
 566         /* put system-speed store-multiple into the pipeline */
 567         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 568         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 569         arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask, 0, 1), NULL, 0);
 570
 571 }
 572
 573 void arm7tdmi_store_hword_reg(target_t *target, int num)
 574 {
 575         /* get pointers to arch-specific information */
 576         armv4_5_common_t *armv4_5 = target->arch_info;
 577         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 578         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 579
 580         /* put system-speed store half-word into the pipeline */
 581         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 582         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 583         arm7tdmi_clock_out(jtag_info, ARMV4_5_STRH_IP(num, 0), NULL, 0);
 584
 585 }
 586
 587 void arm7tdmi_store_byte_reg(target_t *target, int num)
 588 {
 589         /* get pointers to arch-specific information */
 590         armv4_5_common_t *armv4_5 = target->arch_info;
 591         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 592         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 593
 594         /* put system-speed store byte into the pipeline */
 595         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 596         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 597         arm7tdmi_clock_out(jtag_info, ARMV4_5_STRB_IP(num, 0), NULL, 0);
 598
 599 }
 600
 601 void arm7tdmi_write_pc(target_t *target, u32 pc)
 602 {
 603         /* get pointers to arch-specific information */
 604         armv4_5_common_t *armv4_5 = target->arch_info;
 605         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 606         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 607
 608         /* LDMIA r0-15, [r0] at debug speed
 609          * register values will start to appear on 4th DCLK
 610          */
 611         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x8000, 0, 0), NULL, 0);
 612         /* fetch NOP, LDM in DECODE stage */
 613         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 614         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 615         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 616         /* nothing fetched, LDM in EXECUTE stage (1st cycle) load register */
 617         arm7tdmi_clock_out_inner(jtag_info, pc, 0);
 618         /* nothing fetched, LDM in EXECUTE stage (2nd cycle) load register */
 619         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 620         /* nothing fetched, LDM in EXECUTE stage (3rd cycle) load register */
 621         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 622         /* fetch NOP, LDM in EXECUTE stage (4th cycle) */
 623         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 624         /* fetch NOP, LDM in EXECUTE stage (5th cycle) */
 625         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
 626 }
 627
 628 void arm7tdmi_branch_resume(target_t *target)
 629 {
 630         /* get pointers to arch-specific information */
 631         armv4_5_common_t *armv4_5 = target->arch_info;
 632         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 633         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 634
 635         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
 636         arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_B(0xfffffa, 0), 0);
 637
 638 }
 639
 640 void arm7tdmi_branch_resume_thumb(target_t *target)
 641 {
 642         LOG_DEBUG("-");
 643
 644         /* get pointers to arch-specific information */
 645         armv4_5_common_t *armv4_5 = target->arch_info;
 646         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 647         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 648         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 649
 650         /* LDMIA r0, [r0] at debug speed
 651          * register values will start to appear on 4th DCLK
 652          */
 653         arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x1, 0, 0), NULL, 0);
 654
 655         /* fetch NOP, LDM in DECODE stage */
 656         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 657         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 658         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 659         /* nothing fetched, LDM in EXECUTE stage (2nd cycle) */
 660         arm7tdmi_clock_out(jtag_info, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32) | 1, NULL, 0);
 661         /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */
 662         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 663
 664         /* Branch and eXchange */
 665         arm7tdmi_clock_out(jtag_info, ARMV4_5_BX(0), NULL, 0);
 666
 667         embeddedice_read_reg(dbg_stat);
 668
 669         /* fetch NOP, BX in DECODE stage */
 670         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 671
 672         /* target is now in Thumb state */
 673         embeddedice_read_reg(dbg_stat);
 674
 675         /* fetch NOP, BX in EXECUTE stage (1st cycle) */
 676         arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
 677
 678         /* target is now in Thumb state */
 679         embeddedice_read_reg(dbg_stat);
 680
 681         /* load r0 value */
 682         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_LDR_PCREL(0), NULL, 0);
 683         /* fetch NOP, LDR in Decode */
 684         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 685         /* fetch NOP, LDR in Execute */
 686         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 687         /* nothing fetched, LDR in EXECUTE stage (2nd cycle) */
 688         arm7tdmi_clock_out(jtag_info, buf_get_u32(armv4_5->core_cache->reg_list[0].value, 0, 32), NULL, 0);
 689         /* nothing fetched, LDR in EXECUTE stage (3rd cycle) */
 690         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 691
 692         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 693         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
 694
 695         embeddedice_read_reg(dbg_stat);
 696
 697         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 1);
 698         arm7tdmi_clock_out(jtag_info, ARMV4_5_T_B(0x7f8), NULL, 0);
 699
 700 }
 701
 702 void arm7tdmi_build_reg_cache(target_t *target)
 703 {
 704         reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
 705         /* get pointers to arch-specific information */
 706         armv4_5_common_t *armv4_5 = target->arch_info;
 707
 708         (*cache_p) = armv4_5_build_reg_cache(target, armv4_5);
 709         armv4_5->core_cache = (*cache_p);
 710 }
 711
 712 int arm7tdmi_examine(struct target_s *target)
 713 {
 714         int retval;
 715         armv4_5_common_t *armv4_5 = target->arch_info;
 716         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 717         if (!target->type->examined)
 718         {
 719                 /* get pointers to arch-specific information */
 720                 reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
 721                 reg_cache_t *t=embeddedice_build_reg_cache(target, arm7_9);
 722                 if (t==NULL)
 723                         return ERROR_FAIL;
 724
 725                 (*cache_p) = t;
 726                 arm7_9->eice_cache = (*cache_p);
 727
 728                 if (arm7_9->etm_ctx)
 729                 {
 730                         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 731                         (*cache_p)->next = etm_build_reg_cache(target, jtag_info, arm7_9->etm_ctx);
 732                         arm7_9->etm_ctx->reg_cache = (*cache_p)->next;
 733                 }
 734                 target->type->examined = 1;
 735         }
 736         if ((retval=embeddedice_setup(target))!=ERROR_OK)
 737                 return retval;
 738         if ((retval=arm7_9_setup(target))!=ERROR_OK)
 739                 return retval;
 740         if (arm7_9->etm_ctx)
 741         {
 742                 if ((retval=etm_setup(target))!=ERROR_OK)
 743                         return retval;
 744         }
 745         return ERROR_OK;
 746 }
 747
 748 int arm7tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 749 {
 750
 751         arm7tdmi_build_reg_cache(target);
 752
 753         return ERROR_OK;
 754
 755 }
 756
 757 int arm7tdmi_quit(void)
 758 {
 759
 760         return ERROR_OK;
 761 }
 762
 763 int arm7tdmi_init_arch_info(target_t *target, arm7tdmi_common_t *arm7tdmi, int chain_pos, const char *variant)
 764 {
 765         armv4_5_common_t *armv4_5;
 766         arm7_9_common_t *arm7_9;
 767
 768         arm7_9 = &arm7tdmi->arm7_9_common;
 769         armv4_5 = &arm7_9->armv4_5_common;
 770
 771         /* prepare JTAG information for the new target */
 772         arm7_9->jtag_info.chain_pos = chain_pos;
 773         arm7_9->jtag_info.scann_size = 4;
 774
 775         /* register arch-specific functions */
 776         arm7_9->examine_debug_reason = arm7tdmi_examine_debug_reason;
 777         arm7_9->change_to_arm = arm7tdmi_change_to_arm;
 778         arm7_9->read_core_regs = arm7tdmi_read_core_regs;
 779         arm7_9->read_core_regs_target_buffer = arm7tdmi_read_core_regs_target_buffer;
 780         arm7_9->read_xpsr = arm7tdmi_read_xpsr;
 781
 782         arm7_9->write_xpsr = arm7tdmi_write_xpsr;
 783         arm7_9->write_xpsr_im8 = arm7tdmi_write_xpsr_im8;
 784         arm7_9->write_core_regs = arm7tdmi_write_core_regs;
 785
 786         arm7_9->load_word_regs = arm7tdmi_load_word_regs;
 787         arm7_9->load_hword_reg = arm7tdmi_load_hword_reg;
 788         arm7_9->load_byte_reg = arm7tdmi_load_byte_reg;
 789
 790         arm7_9->store_word_regs = arm7tdmi_store_word_regs;
 791         arm7_9->store_hword_reg = arm7tdmi_store_hword_reg;
 792         arm7_9->store_byte_reg = arm7tdmi_store_byte_reg;
 793
 794         arm7_9->write_pc = arm7tdmi_write_pc;
 795         arm7_9->branch_resume = arm7tdmi_branch_resume;
 796         arm7_9->branch_resume_thumb = arm7tdmi_branch_resume_thumb;
 797
 798         arm7_9->enable_single_step = arm7_9_enable_eice_step;
 799         arm7_9->disable_single_step = arm7_9_disable_eice_step;
 800
 801         arm7_9->pre_debug_entry = NULL;
 802         arm7_9->post_debug_entry = NULL;
 803
 804         arm7_9->pre_restore_context = NULL;
 805         arm7_9->post_restore_context = NULL;
 806
 807         /* initialize arch-specific breakpoint handling */
 808         arm7_9->arm_bkpt = 0xdeeedeee;
 809         arm7_9->thumb_bkpt = 0xdeee;
 810
 811         arm7_9->dbgreq_adjust_pc = 2;
 812         arm7_9->arch_info = arm7tdmi;
 813
 814         arm7tdmi->arch_info = NULL;
 815         arm7tdmi->common_magic = ARM7TDMI_COMMON_MAGIC;
 816
 817         if (variant)
 818         {
 819                 arm7tdmi->variant = strdup(variant);
 820         }
 821         else
 822         {
 823                 arm7tdmi->variant = strdup("");
 824         }
 825
 826         arm7_9_init_arch_info(target, arm7_9);
 827
 828         return ERROR_OK;
 829 }
 830
 831
 832
 833 int arm7tdmi_target_create( struct target_s *target, Jim_Interp *interp )
 834 {
 835         arm7tdmi_common_t *arm7tdmi;
 836
 837         arm7tdmi = calloc(1,sizeof(arm7tdmi_common_t));
 838
 839         arm7tdmi_init_arch_info(target, arm7tdmi, target->chain_position, target->variant);
 840
 841         return ERROR_OK;
 842 }
 843
 844
 845 int arm7tdmi_register_commands(struct command_context_s *cmd_ctx)
 846 {
 847         int retval;
 848
 849         retval = arm7_9_register_commands(cmd_ctx);
 850
 851         return ERROR_OK;
 852
 853 }
 854
 855
 856
 857
 858 /*
 859  * Local Variables: ***
 860  * c-basic-offset: 4 ***
 861  * tab-width: 4 ***
 862  * End: ***
 863  */