src/target/arm9tdmi.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 "arm9tdmi.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 "log.h"
  32 #include "jtag.h"
  33 #include "arm_jtag.h"
  34
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #if 0
  39 #define _DEBUG_INSTRUCTION_EXECUTION_
  40 #endif
  41
  42 /* cli handling */
  43 int arm9tdmi_register_commands(struct command_context_s *cmd_ctx);
  44
  45 /* forward declarations */
  46 int arm9tdmi_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
  47 int arm9tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  48 int arm9tdmi_quit();
  49
  50 /* target function declarations */
  51 enum target_state arm9tdmi_poll(struct target_s *target);
  52 int arm9tdmi_halt(target_t *target);
  53 int arm9tdmi_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer);
  54
  55 target_type_t arm9tdmi_target =
  56 {
  57         .name = "arm9tdmi",
  58
  59         .poll = arm7_9_poll,
  60         .arch_state = armv4_5_arch_state,
  61
  62         .halt = arm7_9_halt,
  63         .resume = arm7_9_resume,
  64         .step = arm7_9_step,
  65
  66         .assert_reset = arm7_9_assert_reset,
  67         .deassert_reset = arm7_9_deassert_reset,
  68         .soft_reset_halt = arm7_9_soft_reset_halt,
  69
  70         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  71
  72         .read_memory = arm7_9_read_memory,
  73         .write_memory = arm7_9_write_memory,
  74         .bulk_write_memory = arm7_9_bulk_write_memory,
  75
  76         .add_breakpoint = arm7_9_add_breakpoint,
  77         .remove_breakpoint = arm7_9_remove_breakpoint,
  78         .add_watchpoint = arm7_9_add_watchpoint,
  79         .remove_watchpoint = arm7_9_remove_watchpoint,
  80
  81         .register_commands = arm9tdmi_register_commands,
  82         .target_command = arm9tdmi_target_command,
  83         .init_target = arm9tdmi_init_target,
  84         .quit = arm9tdmi_quit
  85 };
  86
  87 int arm9tdmi_examine_debug_reason(target_t *target)
  88 {
  89         /* get pointers to arch-specific information */
  90         armv4_5_common_t *armv4_5 = target->arch_info;
  91         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
  92
  93         /* only check the debug reason if we don't know it already */
  94         if ((target->debug_reason != DBG_REASON_DBGRQ)
  95                         && (target->debug_reason != DBG_REASON_SINGLESTEP))
  96         {
  97                 scan_field_t fields[3];
  98                 u8 databus[4];
  99                 u8 instructionbus[4];
 100                 u8 debug_reason;
 101
 102                 jtag_add_end_state(TAP_PD);
 103
 104                 fields[0].device = arm7_9->jtag_info.chain_pos;
 105                 fields[0].num_bits = 32;
 106                 fields[0].out_value = NULL;
 107                 fields[0].out_mask = NULL;
 108                 fields[0].in_value = databus;
 109                 fields[0].in_check_value = NULL;
 110                 fields[0].in_check_mask = NULL;
 111                 fields[0].in_handler = NULL;
 112                 fields[0].in_handler_priv = NULL;
 113
 114                 fields[1].device = arm7_9->jtag_info.chain_pos;
 115                 fields[1].num_bits = 3;
 116                 fields[1].out_value = NULL;
 117                 fields[1].out_mask = NULL;
 118                 fields[1].in_value = &debug_reason;
 119                 fields[1].in_check_value = NULL;
 120                 fields[1].in_check_mask = NULL;
 121                 fields[1].in_handler = NULL;
 122                 fields[1].in_handler_priv = NULL;
 123
 124                 fields[2].device = arm7_9->jtag_info.chain_pos;
 125                 fields[2].num_bits = 32;
 126                 fields[2].out_value = NULL;
 127                 fields[2].out_mask = NULL;
 128                 fields[2].in_value = instructionbus;
 129                 fields[2].in_check_value = NULL;
 130                 fields[2].in_check_mask = NULL;
 131                 fields[2].in_handler = NULL;
 132                 fields[2].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);
 136
 137                 jtag_add_dr_scan(3, fields, TAP_PD);
 138                 jtag_execute_queue();
 139
 140                 fields[0].in_value = NULL;
 141                 fields[0].out_value = databus;
 142                 fields[1].in_value = NULL;
 143                 fields[1].out_value = &debug_reason;
 144                 fields[2].in_value = NULL;
 145                 fields[2].out_value = instructionbus;
 146
 147                 jtag_add_dr_scan(3, fields, TAP_PD);
 148
 149                 if (debug_reason & 0x4)
 150                         if (debug_reason & 0x2)
 151                                 target->debug_reason = DBG_REASON_WPTANDBKPT;
 152                 else
 153                         target->debug_reason = DBG_REASON_WATCHPOINT;
 154                 else
 155                         target->debug_reason = DBG_REASON_BREAKPOINT;
 156         }
 157
 158         return ERROR_OK;
 159 }
 160
 161 /* put an instruction in the ARM9TDMI pipeline or write the data bus, and optionally read data */
 162 int arm9tdmi_clock_out(arm_jtag_t *jtag_info, u32 instr, u32 out, u32 *in, int sysspeed)
 163 {
 164         scan_field_t fields[3];
 165         u8 out_buf[4];
 166         u8 instr_buf[4];
 167         u8 sysspeed_buf = 0x0;
 168
 169         /* prepare buffer */
 170         buf_set_u32(out_buf, 0, 32, out);
 171
 172         instr = flip_u32(instr, 32);
 173         buf_set_u32(instr_buf, 0, 32, instr);
 174
 175         if (sysspeed)
 176                 buf_set_u32(&sysspeed_buf, 2, 1, 1);
 177
 178         jtag_add_end_state(TAP_PD);
 179         arm_jtag_scann(jtag_info, 0x1);
 180         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr);
 181
 182         fields[0].device = jtag_info->chain_pos;
 183         fields[0].num_bits = 32;
 184         fields[0].out_value = out_buf;
 185         fields[0].out_mask = NULL;
 186         if (in)
 187         {
 188                 fields[0].in_value = (u8*)in;
 189         } else
 190         {
 191                 fields[0].in_value = NULL;
 192         }
 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 = 3;
 200         fields[1].out_value = &sysspeed_buf;
 201         fields[1].out_mask = NULL;
 202         fields[1].in_value = NULL;
 203         fields[1].in_check_value = NULL;
 204         fields[1].in_check_mask = NULL;
 205         fields[1].in_handler = NULL;
 206         fields[1].in_handler_priv = NULL;
 207
 208         fields[2].device = jtag_info->chain_pos;
 209         fields[2].num_bits = 32;
 210         fields[2].out_value = instr_buf;
 211         fields[2].out_mask = NULL;
 212         fields[2].in_value = NULL;
 213         fields[2].in_check_value = NULL;
 214         fields[2].in_check_mask = NULL;
 215         fields[2].in_handler = NULL;
 216         fields[2].in_handler_priv = NULL;
 217
 218         jtag_add_dr_scan(3, fields, -1);
 219
 220         jtag_add_runtest(0, -1);
 221
 222 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 223         {
 224                 char* in_string;
 225                 jtag_execute_queue();
 226
 227                 if (in)
 228                 {
 229                         in_string = buf_to_char((u8*)in, 32);
 230                         DEBUG("instr: 0x%8.8x, out: 0x%8.8x, in: %s", flip_u32(instr, 32), out, in_string);
 231                         free(in_string);
 232                 }
 233                 else
 234                         DEBUG("instr: 0x%8.8x, out: 0x%8.8x", flip_u32(instr, 32), out);
 235         }
 236 #endif
 237
 238         return ERROR_OK;
 239 }
 240
 241 /* just read data (instruction and data-out = don't care) */
 242 int arm9tdmi_clock_data_in(arm_jtag_t *jtag_info, u32 *in)
 243 {
 244         scan_field_t fields[3];
 245
 246         jtag_add_end_state(TAP_PD);
 247         arm_jtag_scann(jtag_info, 0x1);
 248         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr);
 249
 250         fields[0].device = jtag_info->chain_pos;
 251         fields[0].num_bits = 32;
 252         fields[0].out_value = NULL;
 253         fields[0].out_mask = NULL;
 254         fields[0].in_value = (u8*)in;
 255         fields[0].in_handler = NULL;
 256         fields[0].in_handler_priv = NULL;
 257         fields[0].in_check_value = NULL;
 258         fields[0].in_check_mask = NULL;
 259
 260         fields[1].device = jtag_info->chain_pos;
 261         fields[1].num_bits = 3;
 262         fields[1].out_value = NULL;
 263         fields[1].out_mask = NULL;
 264         fields[1].in_value = NULL;
 265         fields[1].in_handler = NULL;
 266         fields[1].in_handler_priv = NULL;
 267         fields[1].in_check_value = NULL;
 268         fields[1].in_check_mask = NULL;
 269
 270         fields[2].device = jtag_info->chain_pos;
 271         fields[2].num_bits = 32;
 272         fields[2].out_value = NULL;
 273         fields[2].out_mask = NULL;
 274         fields[2].in_value = NULL;
 275         fields[2].in_check_value = NULL;
 276         fields[2].in_check_mask = NULL;
 277         fields[2].in_handler = NULL;
 278         fields[2].in_handler_priv = NULL;
 279
 280         jtag_add_dr_scan(3, fields, -1);
 281
 282         jtag_add_runtest(0, -1);
 283
 284 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 285         {
 286                 char* in_string;
 287                 jtag_execute_queue();
 288
 289                 if (in)
 290                 {
 291                         in_string = buf_to_char((u8*)in, 32);
 292                         DEBUG("in: %s", in_string);
 293                         free(in_string);
 294                 }
 295         }
 296 #endif
 297
 298         return ERROR_OK;
 299 }
 300
 301 void arm9tdmi_change_to_arm(target_t *target, u32 *r0, u32 *pc)
 302 {
 303         /* get pointers to arch-specific information */
 304         armv4_5_common_t *armv4_5 = target->arch_info;
 305         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 306         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 307
 308         /* save r0 before using it and put system in ARM state
 309          * to allow common handling of ARM and THUMB debugging */
 310
 311         /* fetch STR r0, [r0] */
 312         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), 0, NULL, 0);
 313         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 314         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 315         /* STR r0, [r0] in Memory */
 316         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, r0, 0);
 317
 318         /* MOV r0, r15 fetched, STR in Decode */
 319         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_MOV(0, 15), 0, NULL, 0);
 320         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 321         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), 0, NULL, 0);
 322         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 323         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 324         /* nothing fetched, STR r0, [r0] in Memory */
 325         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, pc, 0);
 326
 327         /* fetch MOV */
 328         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_MOV_IM(0, 0x0), 0, NULL, 0);
 329         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 330         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 331
 332         /* fetch BX */
 333         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_BX(0), 0, NULL, 0);
 334         /* NOP fetched, BX in Decode, MOV in Execute */
 335         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 336         /* NOP fetched, BX in Execute (1) */
 337         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 338
 339         jtag_execute_queue();
 340
 341         /* fix program counter:
 342          * MOV r0, r15 was the 5th instruction (+8)
 343          * reading PC in Thumb state gives address of instruction + 4
 344          */
 345         *pc -= 0xc;
 346 }
 347
 348 void arm9tdmi_read_core_regs(target_t *target, u32 mask, u32* core_regs[16])
 349 {
 350         int i;
 351         /* get pointers to arch-specific information */
 352         armv4_5_common_t *armv4_5 = target->arch_info;
 353         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 354         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 355
 356         /* STMIA r0-15, [r0] at debug speed
 357          * register values will start to appear on 4th DCLK
 358          */
 359         arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
 360
 361         /* fetch NOP, STM in DECODE stage */
 362         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 363         /* fetch NOP, STM in EXECUTE stage (1st cycle) */
 364         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 365
 366         for (i = 0; i <= 15; i++)
 367         {
 368                 if (mask & (1 << i))
 369                         /* nothing fetched, STM in MEMORY (i'th cycle) */
 370                         arm9tdmi_clock_data_in(jtag_info, core_regs[i]);
 371         }
 372
 373 }
 374
 375 void arm9tdmi_read_xpsr(target_t *target, u32 *xpsr, int spsr)
 376 {
 377         /* get pointers to arch-specific information */
 378         armv4_5_common_t *armv4_5 = target->arch_info;
 379         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 380         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 381
 382         /* MRS r0, cpsr */
 383         arm9tdmi_clock_out(jtag_info, ARMV4_5_MRS(0, spsr & 1), 0, NULL, 0);
 384         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 385         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 386         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 387         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 388
 389         /* STR r0, [r15] */
 390         arm9tdmi_clock_out(jtag_info, ARMV4_5_STR(0, 15), 0, NULL, 0);
 391         /* fetch NOP, STR in DECODE stage */
 392         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 393         /* fetch NOP, STR in EXECUTE stage (1st cycle) */
 394         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 395         /* nothing fetched, STR in MEMORY */
 396         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, xpsr, 0);
 397
 398 }
 399
 400 void arm9tdmi_write_xpsr(target_t *target, u32 xpsr, int spsr)
 401 {
 402         /* get pointers to arch-specific information */
 403         armv4_5_common_t *armv4_5 = target->arch_info;
 404         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 405         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 406
 407         DEBUG("xpsr: %8.8x, spsr: %i", xpsr, spsr);
 408
 409         /* MSR1 fetched */
 410         arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr & 0xff, 0, 1, spsr), 0, NULL, 0);
 411         /* MSR2 fetched, MSR1 in DECODE */
 412         arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff00) >> 8, 0xc, 2, spsr), 0, NULL, 0);
 413         /* MSR3 fetched, MSR1 in EXECUTE (1), MSR2 in DECODE */
 414         arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff0000) >> 16, 0x8, 4, spsr), 0, NULL, 0);
 415         /* nothing fetched, MSR1 in EXECUTE (2) */
 416         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 417         /* nothing fetched, MSR1 in EXECUTE (3) */
 418         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 419         /* MSR4 fetched, MSR2 in EXECUTE (1), MSR3 in DECODE */
 420         arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff000000) >> 24, 0x4, 8, spsr), 0, NULL, 0);
 421         /* nothing fetched, MSR2 in EXECUTE (2) */
 422         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 423         /* nothing fetched, MSR2 in EXECUTE (3) */
 424         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 425         /* NOP fetched, MSR3 in EXECUTE (1), MSR4 in DECODE */
 426         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 427         /* nothing fetched, MSR3 in EXECUTE (2) */
 428         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 429         /* nothing fetched, MSR3 in EXECUTE (3) */
 430         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 431         /* NOP fetched, MSR4 in EXECUTE (1) */
 432         /* last MSR writes flags, which takes only one cycle */
 433         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 434 }
 435
 436 void arm9tdmi_write_xpsr_im8(target_t *target, u8 xpsr_im, int rot, int spsr)
 437 {
 438         /* get pointers to arch-specific information */
 439         armv4_5_common_t *armv4_5 = target->arch_info;
 440         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 441         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 442
 443         DEBUG("xpsr_im: %2.2x, rot: %i, spsr: %i", xpsr_im, rot, spsr);
 444
 445         /* MSR fetched */
 446         arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr_im, rot, 1, spsr), 0, NULL, 0);
 447         /* NOP fetched, MSR in DECODE */
 448         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 449         /* NOP fetched, MSR in EXECUTE (1) */
 450         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 451
 452         /* rot == 4 writes flags, which takes only one cycle */
 453         if (rot != 4)
 454         {
 455                 /* nothing fetched, MSR in EXECUTE (2) */
 456                 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 457                 /* nothing fetched, MSR in EXECUTE (3) */
 458                 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 459         }
 460 }
 461
 462 void arm9tdmi_write_core_regs(target_t *target, u32 mask, u32 core_regs[16])
 463 {
 464         int i;
 465         /* get pointers to arch-specific information */
 466         armv4_5_common_t *armv4_5 = target->arch_info;
 467         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 468         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 469
 470         /* LDMIA r0-15, [r0] at debug speed
 471         * register values will start to appear on 4th DCLK
 472         */
 473         arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
 474
 475         /* fetch NOP, LDM in DECODE stage */
 476         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 477         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 478         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 479
 480         for (i = 0; i <= 15; i++)
 481         {
 482                 if (mask & (1 << i))
 483                         /* nothing fetched, LDM still in EXECUTE (1+i cycle) */
 484                         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, core_regs[i], NULL, 0);
 485         }
 486         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 487
 488 }
 489
 490 void arm9tdmi_load_word_regs(target_t *target, u32 mask)
 491 {
 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         /* put system-speed load-multiple into the pipeline */
 498         arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 1), 0, NULL, 0);
 499         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
 500
 501 }
 502
 503 void arm9tdmi_load_hword_reg(target_t *target, int num)
 504 {
 505         /* get pointers to arch-specific information */
 506         armv4_5_common_t *armv4_5 = target->arch_info;
 507         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 508         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 509
 510         /* put system-speed load half-word into the pipeline */
 511         arm9tdmi_clock_out(jtag_info, ARMV4_5_LDRH_IP(num, 0), 0, NULL, 0);
 512         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
 513 }
 514
 515 void arm9tdmi_load_byte_reg(target_t *target, int num)
 516 {
 517         /* get pointers to arch-specific information */
 518         armv4_5_common_t *armv4_5 = target->arch_info;
 519         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 520         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 521
 522         /* put system-speed load byte into the pipeline */
 523         arm9tdmi_clock_out(jtag_info, ARMV4_5_LDRB_IP(num, 0), 0, NULL, 0);
 524         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
 525
 526 }
 527
 528 void arm9tdmi_store_word_regs(target_t *target, u32 mask)
 529 {
 530         /* get pointers to arch-specific information */
 531         armv4_5_common_t *armv4_5 = target->arch_info;
 532         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 533         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 534
 535         /* put system-speed store-multiple into the pipeline */
 536         arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask, 0, 1), 0, NULL, 0);
 537         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
 538
 539 }
 540
 541 void arm9tdmi_store_hword_reg(target_t *target, int num)
 542 {
 543         /* get pointers to arch-specific information */
 544         armv4_5_common_t *armv4_5 = target->arch_info;
 545         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 546         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 547
 548         /* put system-speed store half-word into the pipeline */
 549         arm9tdmi_clock_out(jtag_info, ARMV4_5_STRH_IP(num, 0), 0, NULL, 0);
 550         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
 551
 552 }
 553
 554 void arm9tdmi_store_byte_reg(target_t *target, int num)
 555 {
 556         /* get pointers to arch-specific information */
 557         armv4_5_common_t *armv4_5 = target->arch_info;
 558         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 559         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 560
 561         /* put system-speed store byte into the pipeline */
 562         arm9tdmi_clock_out(jtag_info, ARMV4_5_STRB_IP(num, 0), 0, NULL, 0);
 563         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
 564
 565 }
 566
 567 void arm9tdmi_write_pc(target_t *target, u32 pc)
 568 {
 569         /* get pointers to arch-specific information */
 570         armv4_5_common_t *armv4_5 = target->arch_info;
 571         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 572         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 573
 574         /* LDMIA r0-15, [r0] at debug speed
 575          * register values will start to appear on 4th DCLK
 576          */
 577         arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x8000, 0, 0), 0, NULL, 0);
 578
 579         /* fetch NOP, LDM in DECODE stage */
 580         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 581         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 582         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 583         /* nothing fetched, LDM in EXECUTE stage (2nd cycle) (output data) */
 584         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, pc, NULL, 0);
 585         /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */
 586         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 587         /* fetch NOP, LDM in EXECUTE stage (4th cycle) */
 588         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 589         /* fetch NOP, LDM in EXECUTE stage (5th cycle) */
 590         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 591
 592 }
 593
 594 void arm9tdmi_branch_resume(target_t *target)
 595 {
 596         /* get pointers to arch-specific information */
 597         armv4_5_common_t *armv4_5 = target->arch_info;
 598         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 599         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 600
 601         arm9tdmi_clock_out(jtag_info, ARMV4_5_B(0xfffffc, 0), 0, NULL, 0);
 602         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
 603
 604 }
 605
 606 void arm9tdmi_branch_resume_thumb(target_t *target)
 607 {
 608         DEBUG("");
 609
 610         /* get pointers to arch-specific information */
 611         armv4_5_common_t *armv4_5 = target->arch_info;
 612         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 613         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 614         reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
 615
 616         /* LDMIA r0-15, [r0] at debug speed
 617         * register values will start to appear on 4th DCLK
 618         */
 619         arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x1, 0, 0), 0, NULL, 0);
 620
 621         /* fetch NOP, LDM in DECODE stage */
 622         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 623         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 624         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 625         /* nothing fetched, LDM in EXECUTE stage (2nd cycle) */
 626         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32) | 1, NULL, 0);
 627         /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */
 628         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 629
 630         /* Branch and eXchange */
 631         arm9tdmi_clock_out(jtag_info, ARMV4_5_BX(0), 0, NULL, 0);
 632
 633         embeddedice_read_reg(dbg_stat);
 634
 635         /* fetch NOP, BX in DECODE stage */
 636         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 637
 638         embeddedice_read_reg(dbg_stat);
 639
 640         /* fetch NOP, BX in EXECUTE stage (1st cycle) */
 641         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 642
 643         /* target is now in Thumb state */
 644         embeddedice_read_reg(dbg_stat);
 645
 646         /* clean r0 bits to avoid alignment problems */
 647         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_MOV_IM(0, 0x0), 0, NULL, 0);
 648         /* load r0 value, MOV_IM in Decode*/
 649         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_LDR(0, 0), 0, NULL, 0);
 650         /* fetch NOP, LDR in Decode, MOV_IM in Execute */
 651         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 652         /* fetch NOP, LDR in Execute */
 653         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 654         /* nothing fetched, LDR in EXECUTE stage (2nd cycle) */
 655         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, buf_get_u32(armv4_5->core_cache->reg_list[0].value, 0, 32), NULL, 0);
 656         /* nothing fetched, LDR in EXECUTE stage (3rd cycle) */
 657         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 658
 659         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 660         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 661
 662         embeddedice_read_reg(dbg_stat);
 663
 664         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_B(0x7f6), 0, NULL, 1);
 665         arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
 666
 667 }
 668
 669 void arm9tdmi_enable_single_step(target_t *target)
 670 {
 671         /* get pointers to arch-specific information */
 672         armv4_5_common_t *armv4_5 = target->arch_info;
 673         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 674         arm9tdmi_common_t *arm9 = arm7_9->arch_info;
 675
 676         if (arm9->has_single_step)
 677         {
 678                 buf_set_u32(arm7_9->eice_cache->reg_list[EICE_DBG_CTRL].value, 3, 1, 1);
 679                 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_DBG_CTRL]);
 680         }
 681         else
 682         {
 683                 arm7_9_enable_eice_step(target);
 684         }
 685 }
 686
 687 void arm9tdmi_disable_single_step(target_t *target)
 688 {
 689         /* get pointers to arch-specific information */
 690         armv4_5_common_t *armv4_5 = target->arch_info;
 691         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 692         arm9tdmi_common_t *arm9 = arm7_9->arch_info;
 693
 694         if (arm9->has_single_step)
 695         {
 696                 buf_set_u32(arm7_9->eice_cache->reg_list[EICE_DBG_CTRL].value, 3, 1, 0);
 697                 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_DBG_CTRL]);
 698         }
 699         else
 700         {
 701                 arm7_9_disable_eice_step(target);
 702         }
 703 }
 704
 705 void arm9tdmi_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         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 711         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 712         arm9tdmi_common_t *arm9tdmi = arm7_9->arch_info;
 713
 714
 715         (*cache_p) = armv4_5_build_reg_cache(target, armv4_5);
 716         armv4_5->core_cache = (*cache_p);
 717
 718         (*cache_p)->next = embeddedice_build_reg_cache(target, jtag_info, 0);
 719         arm7_9->eice_cache = (*cache_p)->next;
 720
 721         if (arm9tdmi->has_monitor_mode)
 722                 (*cache_p)->next->reg_list[EICE_DBG_CTRL].size = 6;
 723         else
 724                 (*cache_p)->next->reg_list[EICE_DBG_CTRL].size = 4;
 725
 726         (*cache_p)->next->reg_list[EICE_DBG_STAT].size = 5;
 727
 728 }
 729
 730 int arm9tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 731 {
 732
 733         arm9tdmi_build_reg_cache(target);
 734
 735         return ERROR_OK;
 736
 737 }
 738
 739 int arm9tdmi_quit()
 740 {
 741
 742         return ERROR_OK;
 743 }
 744
 745 int arm9tdmi_init_arch_info(target_t *target, arm9tdmi_common_t *arm9tdmi, int chain_pos, char *variant)
 746 {
 747         armv4_5_common_t *armv4_5;
 748         arm7_9_common_t *arm7_9;
 749
 750         arm7_9 = &arm9tdmi->arm7_9_common;
 751         armv4_5 = &arm7_9->armv4_5_common;
 752
 753         /* prepare JTAG information for the new target */
 754         arm7_9->jtag_info.chain_pos = chain_pos;
 755         arm7_9->jtag_info.scann_size = 5;
 756
 757         /* register arch-specific functions */
 758         arm7_9->examine_debug_reason = arm9tdmi_examine_debug_reason;
 759         arm7_9->change_to_arm = arm9tdmi_change_to_arm;
 760         arm7_9->read_core_regs = arm9tdmi_read_core_regs;
 761         arm7_9->read_xpsr = arm9tdmi_read_xpsr;
 762
 763         arm7_9->write_xpsr = arm9tdmi_write_xpsr;
 764         arm7_9->write_xpsr_im8 = arm9tdmi_write_xpsr_im8;
 765         arm7_9->write_core_regs = arm9tdmi_write_core_regs;
 766
 767         arm7_9->load_word_regs = arm9tdmi_load_word_regs;
 768         arm7_9->load_hword_reg = arm9tdmi_load_hword_reg;
 769         arm7_9->load_byte_reg = arm9tdmi_load_byte_reg;
 770
 771         arm7_9->store_word_regs = arm9tdmi_store_word_regs;
 772         arm7_9->store_hword_reg = arm9tdmi_store_hword_reg;
 773         arm7_9->store_byte_reg = arm9tdmi_store_byte_reg;
 774
 775         arm7_9->write_pc = arm9tdmi_write_pc;
 776         arm7_9->branch_resume = arm9tdmi_branch_resume;
 777         arm7_9->branch_resume_thumb = arm9tdmi_branch_resume_thumb;
 778
 779         arm7_9->enable_single_step = arm9tdmi_enable_single_step;
 780         arm7_9->disable_single_step = arm9tdmi_disable_single_step;
 781
 782         arm7_9->pre_debug_entry = NULL;
 783         arm7_9->post_debug_entry = NULL;
 784
 785         arm7_9->pre_restore_context = NULL;
 786         arm7_9->post_restore_context = NULL;
 787
 788         /* initialize arch-specific breakpoint handling */
 789         buf_set_u32((u8*)(&arm7_9->arm_bkpt), 0, 32, 0xdeeedeee);
 790         buf_set_u32((u8*)(&arm7_9->thumb_bkpt), 0, 16, 0xdeee);
 791
 792         arm7_9->sw_bkpts_use_wp = 1;
 793         arm7_9->sw_bkpts_enabled = 0;
 794         arm7_9->dbgreq_adjust_pc = 3;
 795         arm7_9->arch_info = arm9tdmi;
 796         arm7_9->use_dbgrq = 1;
 797
 798         arm9tdmi->common_magic = ARM9TDMI_COMMON_MAGIC;
 799         arm9tdmi->has_monitor_mode = 0;
 800         arm9tdmi->has_single_step = 0;
 801         arm9tdmi->arch_info = NULL;
 802
 803         if (variant)
 804         {
 805                 if (strcmp(variant, "arm920t") == 0)
 806                         arm9tdmi->has_single_step = 1;
 807                 else if (strcmp(variant, "arm922t") == 0)
 808                         arm9tdmi->has_single_step = 1;
 809                 else if (strcmp(variant, "arm940t") == 0)
 810                         arm9tdmi->has_single_step = 1;
 811                 arm9tdmi->variant = strdup(variant);
 812         }
 813         else
 814                 arm9tdmi->variant = strdup("");
 815
 816         arm7_9_init_arch_info(target, arm7_9);
 817
 818         return ERROR_OK;
 819 }
 820
 821 /* target arm9tdmi <endianess> <startup_mode> <chain_pos> <variant>*/
 822 int arm9tdmi_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
 823 {
 824         int chain_pos;
 825         char *variant = NULL;
 826         arm9tdmi_common_t *arm9tdmi = malloc(sizeof(arm9tdmi_common_t));
 827
 828         if (argc < 4)
 829         {
 830                 ERROR("'target arm9tdmi' requires at least one additional argument");
 831                 exit(-1);
 832         }
 833
 834         chain_pos = strtoul(args[3], NULL, 0);
 835
 836         if (argc >= 5)
 837                 variant = args[4];
 838
 839         arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
 840
 841         return ERROR_OK;
 842 }
 843
 844 int arm9tdmi_register_commands(struct command_context_s *cmd_ctx)
 845 {
 846         int retval;
 847
 848         retval = arm7_9_register_commands(cmd_ctx);
 849
 850         return ERROR_OK;
 851
 852 }
 853