src/target/fa526.c

   1 /***************************************************************************
   2  *   Copyright (C) 2009 by Paulius Zaleckas                                *
   3  *   paulius.zaleckas@gmail.com                                            *
   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
  21 /*
  22  * FA526 is very similar to ARM920T with following differences:
  23  *
  24  * - execution pipeline is 6 steps
  25  * - Unified TLB
  26  * - has Branch Target Buffer
  27  * - does not support reading of I/D cache contents
  28  */
  29
  30 #ifdef HAVE_CONFIG_H
  31 #include "config.h"
  32 #endif
  33
  34 #include "arm920t.h"
  35 #include "target_type.h"
  36
  37 int fa526_target_create(struct target_s *target, Jim_Interp *interp);
  38 int fa526_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  39 int fa526_quit(void);
  40
  41 target_type_t fa526_target =
  42 {
  43         .name = "fa526",
  44
  45         .poll = arm7_9_poll,
  46         .arch_state = arm920t_arch_state,
  47
  48         .target_request_data = arm7_9_target_request_data,
  49
  50         .halt = arm7_9_halt,
  51         .resume = arm7_9_resume,
  52         .step = arm7_9_step,
  53
  54         .assert_reset = arm7_9_assert_reset,
  55         .deassert_reset = arm7_9_deassert_reset,
  56         .soft_reset_halt = arm920t_soft_reset_halt,
  57
  58         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  59
  60         .read_memory = arm920t_read_memory,
  61         .write_memory = arm920t_write_memory,
  62         .bulk_write_memory = arm7_9_bulk_write_memory,
  63         .checksum_memory = arm7_9_checksum_memory,
  64         .blank_check_memory = arm7_9_blank_check_memory,
  65
  66         .run_algorithm = armv4_5_run_algorithm,
  67
  68         .add_breakpoint = arm7_9_add_breakpoint,
  69         .remove_breakpoint = arm7_9_remove_breakpoint,
  70         .add_watchpoint = arm7_9_add_watchpoint,
  71         .remove_watchpoint = arm7_9_remove_watchpoint,
  72
  73         .register_commands = arm920t_register_commands,
  74         .target_create = fa526_target_create,
  75         .init_target = fa526_init_target,
  76         .examine = arm9tdmi_examine,
  77         .quit = fa526_quit
  78 };
  79
  80 void fa526_change_to_arm(target_t *target, uint32_t *r0, uint32_t *pc)
  81 {
  82         LOG_ERROR("%s: there is no Thumb state on FA526", __func__);
  83 }
  84
  85 void fa526_read_core_regs(target_t *target, uint32_t mask, uint32_t* core_regs[16])
  86 {
  87         int i;
  88         /* get pointers to arch-specific information */
  89         armv4_5_common_t *armv4_5 = target->arch_info;
  90         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
  91         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
  92
  93         /* STMIA r0-15, [r0] at debug speed
  94          * register values will start to appear on 4th DCLK
  95          */
  96         arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
  97
  98         /* fetch NOP, STM in DECODE stage */
  99         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 100         /* fetch NOP, STM in SHIFT stage */
 101         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 102         /* fetch NOP, STM in EXECUTE stage (1st cycle) */
 103         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 104
 105         for (i = 0; i <= 15; i++)
 106         {
 107                 if (mask & (1 << i))
 108                         /* nothing fetched, STM in MEMORY (i'th cycle) */
 109                         arm9tdmi_clock_data_in(jtag_info, core_regs[i]);
 110         }
 111 }
 112
 113 void fa526_read_core_regs_target_buffer(target_t *target, uint32_t mask, void* buffer, int size)
 114 {
 115         int i;
 116         /* get pointers to arch-specific information */
 117         armv4_5_common_t *armv4_5 = target->arch_info;
 118         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 119         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 120         int be = (target->endianness == TARGET_BIG_ENDIAN) ? 1 : 0;
 121         uint32_t *buf_u32 = buffer;
 122         uint16_t *buf_u16 = buffer;
 123         uint8_t *buf_u8 = buffer;
 124
 125         /* STMIA r0-15, [r0] at debug speed
 126          * register values will start to appear on 4th DCLK
 127          */
 128         arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
 129
 130         /* fetch NOP, STM in DECODE stage */
 131         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 132         /* fetch NOP, STM in SHIFT stage */
 133         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 134         /* fetch NOP, STM in EXECUTE stage (1st cycle) */
 135         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 136
 137         for (i = 0; i <= 15; i++)
 138         {
 139                 if (mask & (1 << i))
 140                         /* nothing fetched, STM in MEMORY (i'th cycle) */
 141                         switch (size)
 142                         {
 143                                 case 4:
 144                                         arm9tdmi_clock_data_in_endianness(jtag_info, buf_u32++, 4, be);
 145                                         break;
 146                                 case 2:
 147                                         arm9tdmi_clock_data_in_endianness(jtag_info, buf_u16++, 2, be);
 148                                         break;
 149                                 case 1:
 150                                         arm9tdmi_clock_data_in_endianness(jtag_info, buf_u8++, 1, be);
 151                                         break;
 152                         }
 153         }
 154 }
 155
 156 void fa526_read_xpsr(target_t *target, uint32_t *xpsr, int spsr)
 157 {
 158         /* get pointers to arch-specific information */
 159         armv4_5_common_t *armv4_5 = target->arch_info;
 160         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 161         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 162
 163         /* MRS r0, cpsr */
 164         arm9tdmi_clock_out(jtag_info, ARMV4_5_MRS(0, spsr & 1), 0, NULL, 0);
 165         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 166         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 167         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 168         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 169         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 170
 171         /* STR r0, [r15] */
 172         arm9tdmi_clock_out(jtag_info, ARMV4_5_STR(0, 15), 0, NULL, 0);
 173         /* fetch NOP, STR in DECODE stage */
 174         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 175         /* fetch NOP, STR in SHIFT stage */
 176         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 177         /* fetch NOP, STR in EXECUTE stage (1st cycle) */
 178         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 179         /* nothing fetched, STR in MEMORY */
 180         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, xpsr, 0);
 181 }
 182
 183 void fa526_write_xpsr(target_t *target, uint32_t xpsr, int spsr)
 184 {
 185         /* get pointers to arch-specific information */
 186         armv4_5_common_t *armv4_5 = target->arch_info;
 187         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 188         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 189
 190         LOG_DEBUG("xpsr: %8.8x, spsr: %i", xpsr, spsr);
 191
 192         /* MSR1 fetched */
 193         arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr & 0xff, 0, 1, spsr), 0, NULL, 0);
 194         /* MSR2 fetched, MSR1 in DECODE */
 195         arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff00) >> 8, 0xc, 2, spsr), 0, NULL, 0);
 196         /* MSR3 fetched, MSR1 in SHIFT, MSR2 in DECODE */
 197         arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff0000) >> 16, 0x8, 4, spsr), 0, NULL, 0);
 198         /* MSR4 fetched, MSR1 in EXECUTE (1), MSR2 in SHIFT, MSR3 in DECODE */
 199         arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff000000) >> 24, 0x4, 8, spsr), 0, NULL, 0);
 200         /* nothing fetched, MSR1 in EXECUTE (2) */
 201         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 202         /* nothing fetched, MSR1 in EXECUTE (3) */
 203         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 204         /* nothing fetched, MSR2 in EXECUTE (1), MSR3 in SHIFT, MSR4 in DECODE */
 205         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 206         /* nothing fetched, MSR2 in EXECUTE (2) */
 207         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 208         /* nothing fetched, MSR2 in EXECUTE (3) */
 209         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 210         /* NOP fetched, MSR3 in EXECUTE (1), MSR4 in SHIFT */
 211         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 212         /* nothing fetched, MSR3 in EXECUTE (2) */
 213         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 214         /* nothing fetched, MSR3 in EXECUTE (3) */
 215         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 216         /* NOP fetched, MSR4 in EXECUTE (1) */
 217         /* last MSR writes flags, which takes only one cycle */
 218         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 219 }
 220
 221 void fa526_write_xpsr_im8(target_t *target, uint8_t xpsr_im, int rot, int spsr)
 222 {
 223         /* get pointers to arch-specific information */
 224         armv4_5_common_t *armv4_5 = target->arch_info;
 225         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 226         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 227
 228         LOG_DEBUG("xpsr_im: %2.2x, rot: %i, spsr: %i", xpsr_im, rot, spsr);
 229
 230         /* MSR fetched */
 231         arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr_im, rot, 1, spsr), 0, NULL, 0);
 232         /* NOP fetched, MSR in DECODE */
 233         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 234         /* NOP fetched, MSR in SHIFT */
 235         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 236         /* NOP fetched, MSR in EXECUTE (1) */
 237         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 238
 239         /* rot == 4 writes flags, which takes only one cycle */
 240         if (rot != 4)
 241         {
 242                 /* nothing fetched, MSR in EXECUTE (2) */
 243                 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 244                 /* nothing fetched, MSR in EXECUTE (3) */
 245                 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 246         }
 247 }
 248
 249 void fa526_write_core_regs(target_t *target, uint32_t mask, uint32_t core_regs[16])
 250 {
 251         int i;
 252         /* get pointers to arch-specific information */
 253         armv4_5_common_t *armv4_5 = target->arch_info;
 254         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 255         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 256
 257         /* LDMIA r0-15, [r0] at debug speed
 258         * register values will start to appear on 4th DCLK
 259         */
 260         arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
 261
 262         /* fetch NOP, LDM in DECODE stage */
 263         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 264         /* fetch NOP, LDM in SHIFT stage */
 265         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 266         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 267         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 268
 269         for (i = 0; i <= 15; i++)
 270         {
 271                 if (mask & (1 << i))
 272                         /* nothing fetched, LDM still in EXECUTE (1+i cycle) */
 273                         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, core_regs[i], NULL, 0);
 274         }
 275         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 276 }
 277
 278 void fa526_write_pc(target_t *target, uint32_t pc)
 279 {
 280         /* get pointers to arch-specific information */
 281         armv4_5_common_t *armv4_5 = target->arch_info;
 282         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 283         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 284
 285         /* LDMIA r0-15, [r0] at debug speed
 286          * register values will start to appear on 4th DCLK
 287          */
 288         arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x8000, 0, 0), 0, NULL, 0);
 289
 290         /* fetch NOP, LDM in DECODE stage */
 291         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 292         /* fetch NOP, LDM in SHIFT stage */
 293         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 294         /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
 295         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 296         /* nothing fetched, LDM in EXECUTE stage (2nd cycle) (output data) */
 297         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, pc, NULL, 0);
 298         /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */
 299         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 300         /* fetch NOP, LDM in EXECUTE stage (4th cycle) */
 301         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 302         /* fetch NOP, LDM in EXECUTE stage (5th cycle) */
 303         arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
 304 }
 305
 306 void fa526_branch_resume_thumb(target_t *target)
 307 {
 308         LOG_ERROR("%s: there is no Thumb state on FA526", __func__);
 309 }
 310
 311 int fa526_init_arch_info_2(target_t *target, arm9tdmi_common_t *arm9tdmi, jtag_tap_t *tap)
 312 {
 313         armv4_5_common_t *armv4_5;
 314         arm7_9_common_t *arm7_9;
 315
 316         arm7_9 = &arm9tdmi->arm7_9_common;
 317         armv4_5 = &arm7_9->armv4_5_common;
 318
 319         /* prepare JTAG information for the new target */
 320         arm7_9->jtag_info.tap = tap;
 321         arm7_9->jtag_info.scann_size = 5;
 322
 323         /* register arch-specific functions */
 324         arm7_9->examine_debug_reason = arm9tdmi_examine_debug_reason;
 325         arm7_9->change_to_arm = fa526_change_to_arm;
 326         arm7_9->read_core_regs = fa526_read_core_regs;
 327         arm7_9->read_core_regs_target_buffer = fa526_read_core_regs_target_buffer;
 328         arm7_9->read_xpsr = fa526_read_xpsr;
 329
 330         arm7_9->write_xpsr = fa526_write_xpsr;
 331         arm7_9->write_xpsr_im8 = fa526_write_xpsr_im8;
 332         arm7_9->write_core_regs = fa526_write_core_regs;
 333
 334         arm7_9->load_word_regs = arm9tdmi_load_word_regs;
 335         arm7_9->load_hword_reg = arm9tdmi_load_hword_reg;
 336         arm7_9->load_byte_reg = arm9tdmi_load_byte_reg;
 337
 338         arm7_9->store_word_regs = arm9tdmi_store_word_regs;
 339         arm7_9->store_hword_reg = arm9tdmi_store_hword_reg;
 340         arm7_9->store_byte_reg = arm9tdmi_store_byte_reg;
 341
 342         arm7_9->write_pc = fa526_write_pc;
 343         arm7_9->branch_resume = arm9tdmi_branch_resume;
 344         arm7_9->branch_resume_thumb = fa526_branch_resume_thumb;
 345
 346         arm7_9->enable_single_step = arm9tdmi_enable_single_step;
 347         arm7_9->disable_single_step = arm9tdmi_disable_single_step;
 348
 349         arm7_9->pre_debug_entry = NULL;
 350         arm7_9->post_debug_entry = NULL;
 351
 352         arm7_9->pre_restore_context = NULL;
 353         arm7_9->post_restore_context = NULL;
 354
 355         /* initialize arch-specific breakpoint handling */
 356         arm7_9->arm_bkpt = 0xdeeedeee;
 357         arm7_9->thumb_bkpt = 0xdeee;
 358
 359         arm7_9->dbgreq_adjust_pc = 3;
 360         arm7_9->arch_info = arm9tdmi;
 361
 362         arm9tdmi->common_magic = ARM9TDMI_COMMON_MAGIC;
 363         arm9tdmi->arch_info = NULL;
 364
 365         arm7_9_init_arch_info(target, arm7_9);
 366
 367         /* override use of DBGRQ, this is safe on ARM9TDMI */
 368         arm7_9->use_dbgrq = 1;
 369
 370         /* all ARM9s have the vector catch register */
 371         arm7_9->has_vector_catch = 1;
 372
 373         return ERROR_OK;
 374 }
 375
 376 int fa526_init_arch_info(target_t *target, arm920t_common_t *arm920t, jtag_tap_t *tap)
 377 {
 378         arm9tdmi_common_t *arm9tdmi = &arm920t->arm9tdmi_common;
 379         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 380
 381         /* initialize arm9tdmi specific info (including arm7_9 and armv4_5)
 382          */
 383         fa526_init_arch_info_2(target, arm9tdmi, tap);
 384
 385         arm9tdmi->arch_info = arm920t;
 386         arm920t->common_magic = ARM920T_COMMON_MAGIC;
 387
 388         arm7_9->post_debug_entry = arm920t_post_debug_entry;
 389         arm7_9->pre_restore_context = arm920t_pre_restore_context;
 390
 391         arm920t->armv4_5_mmu.armv4_5_cache.ctype = -1;
 392         arm920t->armv4_5_mmu.get_ttb = arm920t_get_ttb;
 393         arm920t->armv4_5_mmu.read_memory = arm7_9_read_memory;
 394         arm920t->armv4_5_mmu.write_memory = arm7_9_write_memory;
 395         arm920t->armv4_5_mmu.disable_mmu_caches = arm920t_disable_mmu_caches;
 396         arm920t->armv4_5_mmu.enable_mmu_caches = arm920t_enable_mmu_caches;
 397         arm920t->armv4_5_mmu.has_tiny_pages = 1;
 398         arm920t->armv4_5_mmu.mmu_enabled = 0;
 399
 400         /* disabling linefills leads to lockups, so keep them enabled for now
 401          * this doesn't affect correctness, but might affect timing issues, if
 402          * important data is evicted from the cache during the debug session
 403          * */
 404         arm920t->preserve_cache = 0;
 405
 406         /* override hw single-step capability from ARM9TDMI */
 407         arm7_9->has_single_step = 1;
 408
 409         return ERROR_OK;
 410 }
 411
 412 int fa526_target_create(struct target_s *target, Jim_Interp *interp)
 413 {
 414         arm920t_common_t *arm920t = calloc(1,sizeof(arm920t_common_t));
 415
 416         fa526_init_arch_info(target, arm920t, target->tap);
 417
 418         return ERROR_OK;
 419 }
 420
 421 int fa526_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
 422 {
 423         arm9tdmi_init_target(cmd_ctx, target);
 424         return ERROR_OK;
 425 }
 426
 427 int fa526_quit(void)
 428 {
 429         return ERROR_OK;
 430 }