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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2006 by Magnus Lundin                                   *
   6  *   lundin@mlu.mine.nu                                                    *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   Copyright (C) 2009 by Dirk Behme                                      *
  12  *   dirk.behme@gmail.com - copy from cortex_m3                            *
  13  *                                                                         *
  14  *   Copyright (C) 2010 Øyvind Harboe                                      *
  15  *   oyvind.harboe@zylin.com                                               *
  16  *                                                                         *
  17  *   This program is free software; you can redistribute it and/or modify  *
  18  *   it under the terms of the GNU General Public License as published by  *
  19  *   the Free Software Foundation; either version 2 of the License, or     *
  20  *   (at your option) any later version.                                   *
  21  *                                                                         *
  22  *   This program is distributed in the hope that it will be useful,       *
  23  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  24  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  25  *   GNU General Public License for more details.                          *
  26  *                                                                         *
  27  *   You should have received a copy of the GNU General Public License     *
  28  *   along with this program; if not, write to the                         *
  29  *   Free Software Foundation, Inc.,                                       *
  30  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  31  *                                                                         *
  32  *   Cortex-A8(tm) TRM, ARM DDI 0344H                                      *
  33  *                                                                         *
  34  ***************************************************************************/
  35 #ifdef HAVE_CONFIG_H
  36 #include "config.h"
  37 #endif
  38
  39 #include "breakpoints.h"
  40 #include "cortex_a8.h"
  41 #include "register.h"
  42 #include "target_request.h"
  43 #include "target_type.h"
  44 #include "arm_opcodes.h"
  45 #include <helper/time_support.h>
  46
  47 static int cortex_a8_poll(struct target *target);
  48 static int cortex_a8_debug_entry(struct target *target);
  49 static int cortex_a8_restore_context(struct target *target, bool bpwp);
  50 static int cortex_a8_set_breakpoint(struct target *target,
  51                 struct breakpoint *breakpoint, uint8_t matchmode);
  52 static int cortex_a8_unset_breakpoint(struct target *target,
  53                 struct breakpoint *breakpoint);
  54 static int cortex_a8_dap_read_coreregister_u32(struct target *target,
  55                 uint32_t *value, int regnum);
  56 static int cortex_a8_dap_write_coreregister_u32(struct target *target,
  57                 uint32_t value, int regnum);
  58 static int cortex_a8_mmu(struct target *target, int *enabled);
  59 static int cortex_a8_virt2phys(struct target *target,
  60                 uint32_t virt, uint32_t *phys);
  61 static int cortex_a8_disable_mmu_caches(struct target *target, int mmu,
  62                 int d_u_cache, int i_cache);
  63 static int cortex_a8_enable_mmu_caches(struct target *target, int mmu,
  64                 int d_u_cache, int i_cache);
  65 static int cortex_a8_get_ttb(struct target *target, uint32_t *result);
  66
  67
  68 /*
  69  * FIXME do topology discovery using the ROM; don't
  70  * assume this is an OMAP3.   Also, allow for multiple ARMv7-A
  71  * cores, with different AP numbering ... don't use a #define
  72  * for these numbers, use per-core armv7a state.
  73  */
  74 #define swjdp_memoryap 0
  75 #define swjdp_debugap 1
  76 #define OMAP3530_DEBUG_BASE 0x54011000
  77
  78 /*
  79  * Cortex-A8 Basic debug access, very low level assumes state is saved
  80  */
  81 static int cortex_a8_init_debug_access(struct target *target)
  82 {
  83         struct armv7a_common *armv7a = target_to_armv7a(target);
  84         struct adiv5_dap *swjdp = &armv7a->dap;
  85
  86         int retval;
  87         uint32_t dummy;
  88
  89         LOG_DEBUG(" ");
  90
  91         /* Unlocking the debug registers for modification */
  92         /* The debugport might be uninitialised so try twice */
  93         retval = mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_LOCKACCESS, 0xC5ACCE55);
  94         if (retval != ERROR_OK)
  95         {
  96                 /* try again */
  97                 retval = mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_LOCKACCESS, 0xC5ACCE55);
  98                 if (retval == ERROR_OK)
  99                 {
 100                         LOG_USER("Locking debug access failed on first, but succeeded on second try.");
 101                 }
 102         }
 103         if (retval != ERROR_OK)
 104                 return retval;
 105         /* Clear Sticky Power Down status Bit in PRSR to enable access to
 106            the registers in the Core Power Domain */
 107         retval = mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_PRSR, &dummy);
 108         if (retval != ERROR_OK)
 109                 return retval;
 110
 111         /* Enabling of instruction execution in debug mode is done in debug_entry code */
 112
 113         /* Resync breakpoint registers */
 114
 115         /* Since this is likely called from init or reset, update target state information*/
 116         retval = cortex_a8_poll(target);
 117
 118         return retval;
 119 }
 120
 121 /* To reduce needless round-trips, pass in a pointer to the current
 122  * DSCR value.  Initialize it to zero if you just need to know the
 123  * value on return from this function; or DSCR_INSTR_COMP if you
 124  * happen to know that no instruction is pending.
 125  */
 126 static int cortex_a8_exec_opcode(struct target *target,
 127                 uint32_t opcode, uint32_t *dscr_p)
 128 {
 129         uint32_t dscr;
 130         int retval;
 131         struct armv7a_common *armv7a = target_to_armv7a(target);
 132         struct adiv5_dap *swjdp = &armv7a->dap;
 133
 134         dscr = dscr_p ? *dscr_p : 0;
 135
 136         LOG_DEBUG("exec opcode 0x%08" PRIx32, opcode);
 137
 138         /* Wait for InstrCompl bit to be set */
 139         long long then = timeval_ms();
 140         while ((dscr & DSCR_INSTR_COMP) == 0)
 141         {
 142                 retval = mem_ap_read_atomic_u32(swjdp,
 143                                 armv7a->debug_base + CPUDBG_DSCR, &dscr);
 144                 if (retval != ERROR_OK)
 145                 {
 146                         LOG_ERROR("Could not read DSCR register, opcode = 0x%08" PRIx32, opcode);
 147                         return retval;
 148                 }
 149                 if (timeval_ms() > then + 1000)
 150                 {
 151                         LOG_ERROR("Timeout waiting for cortex_a8_exec_opcode");
 152                         return ERROR_FAIL;
 153                 }
 154         }
 155
 156         retval = mem_ap_write_u32(swjdp, armv7a->debug_base + CPUDBG_ITR, opcode);
 157         if (retval != ERROR_OK)
 158                 return retval;
 159
 160         then = timeval_ms();
 161         do
 162         {
 163                 retval = mem_ap_read_atomic_u32(swjdp,
 164                                 armv7a->debug_base + CPUDBG_DSCR, &dscr);
 165                 if (retval != ERROR_OK)
 166                 {
 167                         LOG_ERROR("Could not read DSCR register");
 168                         return retval;
 169                 }
 170                 if (timeval_ms() > then + 1000)
 171                 {
 172                         LOG_ERROR("Timeout waiting for cortex_a8_exec_opcode");
 173                         return ERROR_FAIL;
 174                 }
 175         }
 176         while ((dscr & DSCR_INSTR_COMP) == 0); /* Wait for InstrCompl bit to be set */
 177
 178         if (dscr_p)
 179                 *dscr_p = dscr;
 180
 181         return retval;
 182 }
 183
 184 /**************************************************************************
 185 Read core register with very few exec_opcode, fast but needs work_area.
 186 This can cause problems with MMU active.
 187 **************************************************************************/
 188 static int cortex_a8_read_regs_through_mem(struct target *target, uint32_t address,
 189                 uint32_t * regfile)
 190 {
 191         int retval = ERROR_OK;
 192         struct armv7a_common *armv7a = target_to_armv7a(target);
 193         struct adiv5_dap *swjdp = &armv7a->dap;
 194
 195         retval = cortex_a8_dap_read_coreregister_u32(target, regfile, 0);
 196         if (retval != ERROR_OK)
 197                 return retval;
 198         retval = cortex_a8_dap_write_coreregister_u32(target, address, 0);
 199         if (retval != ERROR_OK)
 200                 return retval;
 201         retval = cortex_a8_exec_opcode(target, ARMV4_5_STMIA(0, 0xFFFE, 0, 0), NULL);
 202         if (retval != ERROR_OK)
 203                 return retval;
 204
 205         dap_ap_select(swjdp, swjdp_memoryap);
 206         retval = mem_ap_read_buf_u32(swjdp, (uint8_t *)(&regfile[1]), 4*15, address);
 207         if (retval != ERROR_OK)
 208                 return retval;
 209         dap_ap_select(swjdp, swjdp_debugap);
 210
 211         return retval;
 212 }
 213
 214 static int cortex_a8_dap_read_coreregister_u32(struct target *target,
 215                 uint32_t *value, int regnum)
 216 {
 217         int retval = ERROR_OK;
 218         uint8_t reg = regnum&0xFF;
 219         uint32_t dscr = 0;
 220         struct armv7a_common *armv7a = target_to_armv7a(target);
 221         struct adiv5_dap *swjdp = &armv7a->dap;
 222
 223         if (reg > 17)
 224                 return retval;
 225
 226         if (reg < 15)
 227         {
 228                 /* Rn to DCCTX, "MCR p14, 0, Rn, c0, c5, 0"  0xEE00nE15 */
 229                 retval = cortex_a8_exec_opcode(target,
 230                                 ARMV4_5_MCR(14, 0, reg, 0, 5, 0),
 231                                 &dscr);
 232                 if (retval != ERROR_OK)
 233                         return retval;
 234         }
 235         else if (reg == 15)
 236         {
 237                 /* "MOV r0, r15"; then move r0 to DCCTX */
 238                 retval = cortex_a8_exec_opcode(target, 0xE1A0000F, &dscr);
 239                 if (retval != ERROR_OK)
 240                         return retval;
 241                 retval = cortex_a8_exec_opcode(target,
 242                                 ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
 243                                 &dscr);
 244                 if (retval != ERROR_OK)
 245                         return retval;
 246         }
 247         else
 248         {
 249                 /* "MRS r0, CPSR" or "MRS r0, SPSR"
 250                  * then move r0 to DCCTX
 251                  */
 252                 retval = cortex_a8_exec_opcode(target, ARMV4_5_MRS(0, reg & 1), &dscr);
 253                 if (retval != ERROR_OK)
 254                         return retval;
 255                 retval = cortex_a8_exec_opcode(target,
 256                                 ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
 257                                 &dscr);
 258                 if (retval != ERROR_OK)
 259                         return retval;
 260         }
 261
 262         /* Wait for DTRRXfull then read DTRRTX */
 263         long long then = timeval_ms();
 264         while ((dscr & DSCR_DTR_TX_FULL) == 0)
 265         {
 266                 retval = mem_ap_read_atomic_u32(swjdp,
 267                                 armv7a->debug_base + CPUDBG_DSCR, &dscr);
 268                 if (retval != ERROR_OK)
 269                         return retval;
 270                 if (timeval_ms() > then + 1000)
 271                 {
 272                         LOG_ERROR("Timeout waiting for cortex_a8_exec_opcode");
 273                         return ERROR_FAIL;
 274                 }
 275         }
 276
 277         retval = mem_ap_read_atomic_u32(swjdp,
 278                         armv7a->debug_base + CPUDBG_DTRTX, value);
 279         LOG_DEBUG("read DCC 0x%08" PRIx32, *value);
 280
 281         return retval;
 282 }
 283
 284 static int cortex_a8_dap_write_coreregister_u32(struct target *target,
 285                 uint32_t value, int regnum)
 286 {
 287         int retval = ERROR_OK;
 288         uint8_t Rd = regnum&0xFF;
 289         uint32_t dscr;
 290         struct armv7a_common *armv7a = target_to_armv7a(target);
 291         struct adiv5_dap *swjdp = &armv7a->dap;
 292
 293         LOG_DEBUG("register %i, value 0x%08" PRIx32, regnum, value);
 294
 295         /* Check that DCCRX is not full */
 296         retval = mem_ap_read_atomic_u32(swjdp,
 297                                 armv7a->debug_base + CPUDBG_DSCR, &dscr);
 298         if (retval != ERROR_OK)
 299                 return retval;
 300         if (dscr & DSCR_DTR_RX_FULL)
 301         {
 302                 LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32, dscr);
 303                 /* Clear DCCRX with MCR(p14, 0, Rd, c0, c5, 0), opcode  0xEE000E15 */
 304                 retval = cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
 305                                 &dscr);
 306                 if (retval != ERROR_OK)
 307                         return retval;
 308         }
 309
 310         if (Rd > 17)
 311                 return retval;
 312
 313         /* Write DTRRX ... sets DSCR.DTRRXfull but exec_opcode() won't care */
 314         LOG_DEBUG("write DCC 0x%08" PRIx32, value);
 315         retval = mem_ap_write_u32(swjdp,
 316                         armv7a->debug_base + CPUDBG_DTRRX, value);
 317         if (retval != ERROR_OK)
 318                 return retval;
 319
 320         if (Rd < 15)
 321         {
 322                 /* DCCRX to Rn, "MCR p14, 0, Rn, c0, c5, 0", 0xEE00nE15 */
 323                 retval = cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, Rd, 0, 5, 0),
 324                                 &dscr);
 325                 if (retval != ERROR_OK)
 326                         return retval;
 327         }
 328         else if (Rd == 15)
 329         {
 330                 /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15
 331                  * then "mov r15, r0"
 332                  */
 333                 retval = cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
 334                                 &dscr);
 335                 if (retval != ERROR_OK)
 336                         return retval;
 337                 retval = cortex_a8_exec_opcode(target, 0xE1A0F000, &dscr);
 338                 if (retval != ERROR_OK)
 339                         return retval;
 340         }
 341         else
 342         {
 343                 /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15
 344                  * then "MSR CPSR_cxsf, r0" or "MSR SPSR_cxsf, r0" (all fields)
 345                  */
 346                 retval = cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
 347                                 &dscr);
 348                 if (retval != ERROR_OK)
 349                         return retval;
 350                 retval = cortex_a8_exec_opcode(target, ARMV4_5_MSR_GP(0, 0xF, Rd & 1),
 351                                 &dscr);
 352                 if (retval != ERROR_OK)
 353                         return retval;
 354
 355                 /* "Prefetch flush" after modifying execution status in CPSR */
 356                 if (Rd == 16)
 357                 {
 358                         retval = cortex_a8_exec_opcode(target,
 359                                         ARMV4_5_MCR(15, 0, 0, 7, 5, 4),
 360                                         &dscr);
 361                         if (retval != ERROR_OK)
 362                                 return retval;
 363                 }
 364         }
 365
 366         return retval;
 367 }
 368
 369 /* Write to memory mapped registers directly with no cache or mmu handling */
 370 static int cortex_a8_dap_write_memap_register_u32(struct target *target, uint32_t address, uint32_t value)
 371 {
 372         int retval;
 373         struct armv7a_common *armv7a = target_to_armv7a(target);
 374         struct adiv5_dap *swjdp = &armv7a->dap;
 375
 376         retval = mem_ap_write_atomic_u32(swjdp, address, value);
 377
 378         return retval;
 379 }
 380
 381 /*
 382  * Cortex-A8 implementation of Debug Programmer's Model
 383  *
 384  * NOTE the invariant:  these routines return with DSCR_INSTR_COMP set,
 385  * so there's no need to poll for it before executing an instruction.
 386  *
 387  * NOTE that in several of these cases the "stall" mode might be useful.
 388  * It'd let us queue a few operations together... prepare/finish might
 389  * be the places to enable/disable that mode.
 390  */
 391
 392 static inline struct cortex_a8_common *dpm_to_a8(struct arm_dpm *dpm)
 393 {
 394         return container_of(dpm, struct cortex_a8_common, armv7a_common.dpm);
 395 }
 396
 397 static int cortex_a8_write_dcc(struct cortex_a8_common *a8, uint32_t data)
 398 {
 399         LOG_DEBUG("write DCC 0x%08" PRIx32, data);
 400         return mem_ap_write_u32(&a8->armv7a_common.dap,
 401                         a8->armv7a_common.debug_base + CPUDBG_DTRRX, data);
 402 }
 403
 404 static int cortex_a8_read_dcc(struct cortex_a8_common *a8, uint32_t *data,
 405                 uint32_t *dscr_p)
 406 {
 407         struct adiv5_dap *swjdp = &a8->armv7a_common.dap;
 408         uint32_t dscr = DSCR_INSTR_COMP;
 409         int retval;
 410
 411         if (dscr_p)
 412                 dscr = *dscr_p;
 413
 414         /* Wait for DTRRXfull */
 415         long long then = timeval_ms();
 416         while ((dscr & DSCR_DTR_TX_FULL) == 0) {
 417                 retval = mem_ap_read_atomic_u32(swjdp,
 418                                 a8->armv7a_common.debug_base + CPUDBG_DSCR,
 419                                 &dscr);
 420                 if (retval != ERROR_OK)
 421                         return retval;
 422                 if (timeval_ms() > then + 1000)
 423                 {
 424                         LOG_ERROR("Timeout waiting for read dcc");
 425                         return ERROR_FAIL;
 426                 }
 427         }
 428
 429         retval = mem_ap_read_atomic_u32(swjdp,
 430                         a8->armv7a_common.debug_base + CPUDBG_DTRTX, data);
 431         if (retval != ERROR_OK)
 432                 return retval;
 433         //LOG_DEBUG("read DCC 0x%08" PRIx32, *data);
 434
 435         if (dscr_p)
 436                 *dscr_p = dscr;
 437
 438         return retval;
 439 }
 440
 441 static int cortex_a8_dpm_prepare(struct arm_dpm *dpm)
 442 {
 443         struct cortex_a8_common *a8 = dpm_to_a8(dpm);
 444         struct adiv5_dap *swjdp = &a8->armv7a_common.dap;
 445         uint32_t dscr;
 446         int retval;
 447
 448         /* set up invariant:  INSTR_COMP is set after ever DPM operation */
 449         long long then = timeval_ms();
 450         for (;;)
 451         {
 452                 retval = mem_ap_read_atomic_u32(swjdp,
 453                                 a8->armv7a_common.debug_base + CPUDBG_DSCR,
 454                                 &dscr);
 455                 if (retval != ERROR_OK)
 456                         return retval;
 457                 if ((dscr & DSCR_INSTR_COMP) != 0)
 458                         break;
 459                 if (timeval_ms() > then + 1000)
 460                 {
 461                         LOG_ERROR("Timeout waiting for dpm prepare");
 462                         return ERROR_FAIL;
 463                 }
 464         }
 465
 466         /* this "should never happen" ... */
 467         if (dscr & DSCR_DTR_RX_FULL) {
 468                 LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32, dscr);
 469                 /* Clear DCCRX */
 470                 retval = cortex_a8_exec_opcode(
 471                                 a8->armv7a_common.armv4_5_common.target,
 472                                 ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
 473                                 &dscr);
 474                 if (retval != ERROR_OK)
 475                         return retval;
 476         }
 477
 478         return retval;
 479 }
 480
 481 static int cortex_a8_dpm_finish(struct arm_dpm *dpm)
 482 {
 483         /* REVISIT what could be done here? */
 484         return ERROR_OK;
 485 }
 486
 487 static int cortex_a8_instr_write_data_dcc(struct arm_dpm *dpm,
 488                 uint32_t opcode, uint32_t data)
 489 {
 490         struct cortex_a8_common *a8 = dpm_to_a8(dpm);
 491         int retval;
 492         uint32_t dscr = DSCR_INSTR_COMP;
 493
 494         retval = cortex_a8_write_dcc(a8, data);
 495         if (retval != ERROR_OK)
 496                 return retval;
 497
 498         return cortex_a8_exec_opcode(
 499                         a8->armv7a_common.armv4_5_common.target,
 500                         opcode,
 501                         &dscr);
 502 }
 503
 504 static int cortex_a8_instr_write_data_r0(struct arm_dpm *dpm,
 505                 uint32_t opcode, uint32_t data)
 506 {
 507         struct cortex_a8_common *a8 = dpm_to_a8(dpm);
 508         uint32_t dscr = DSCR_INSTR_COMP;
 509         int retval;
 510
 511         retval = cortex_a8_write_dcc(a8, data);
 512         if (retval != ERROR_OK)
 513                 return retval;
 514
 515         /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15 */
 516         retval = cortex_a8_exec_opcode(
 517                         a8->armv7a_common.armv4_5_common.target,
 518                         ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
 519                         &dscr);
 520         if (retval != ERROR_OK)
 521                 return retval;
 522
 523         /* then the opcode, taking data from R0 */
 524         retval = cortex_a8_exec_opcode(
 525                         a8->armv7a_common.armv4_5_common.target,
 526                         opcode,
 527                         &dscr);
 528
 529         return retval;
 530 }
 531
 532 static int cortex_a8_instr_cpsr_sync(struct arm_dpm *dpm)
 533 {
 534         struct target *target = dpm->arm->target;
 535         uint32_t dscr = DSCR_INSTR_COMP;
 536
 537         /* "Prefetch flush" after modifying execution status in CPSR */
 538         return cortex_a8_exec_opcode(target,
 539                         ARMV4_5_MCR(15, 0, 0, 7, 5, 4),
 540                         &dscr);
 541 }
 542
 543 static int cortex_a8_instr_read_data_dcc(struct arm_dpm *dpm,
 544                 uint32_t opcode, uint32_t *data)
 545 {
 546         struct cortex_a8_common *a8 = dpm_to_a8(dpm);
 547         int retval;
 548         uint32_t dscr = DSCR_INSTR_COMP;
 549
 550         /* the opcode, writing data to DCC */
 551         retval = cortex_a8_exec_opcode(
 552                         a8->armv7a_common.armv4_5_common.target,
 553                         opcode,
 554                         &dscr);
 555         if (retval != ERROR_OK)
 556                 return retval;
 557
 558         return cortex_a8_read_dcc(a8, data, &dscr);
 559 }
 560
 561
 562 static int cortex_a8_instr_read_data_r0(struct arm_dpm *dpm,
 563                 uint32_t opcode, uint32_t *data)
 564 {
 565         struct cortex_a8_common *a8 = dpm_to_a8(dpm);
 566         uint32_t dscr = DSCR_INSTR_COMP;
 567         int retval;
 568
 569         /* the opcode, writing data to R0 */
 570         retval = cortex_a8_exec_opcode(
 571                         a8->armv7a_common.armv4_5_common.target,
 572                         opcode,
 573                         &dscr);
 574         if (retval != ERROR_OK)
 575                 return retval;
 576
 577         /* write R0 to DCC */
 578         retval = cortex_a8_exec_opcode(
 579                         a8->armv7a_common.armv4_5_common.target,
 580                         ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
 581                         &dscr);
 582         if (retval != ERROR_OK)
 583                 return retval;
 584
 585         return cortex_a8_read_dcc(a8, data, &dscr);
 586 }
 587
 588 static int cortex_a8_bpwp_enable(struct arm_dpm *dpm, unsigned index_t,
 589                 uint32_t addr, uint32_t control)
 590 {
 591         struct cortex_a8_common *a8 = dpm_to_a8(dpm);
 592         uint32_t vr = a8->armv7a_common.debug_base;
 593         uint32_t cr = a8->armv7a_common.debug_base;
 594         int retval;
 595
 596         switch (index_t) {
 597         case 0 ... 15:          /* breakpoints */
 598                 vr += CPUDBG_BVR_BASE;
 599                 cr += CPUDBG_BCR_BASE;
 600                 break;
 601         case 16 ... 31:         /* watchpoints */
 602                 vr += CPUDBG_WVR_BASE;
 603                 cr += CPUDBG_WCR_BASE;
 604                 index_t -= 16;
 605                 break;
 606         default:
 607                 return ERROR_FAIL;
 608         }
 609         vr += 4 * index_t;
 610         cr += 4 * index_t;
 611
 612         LOG_DEBUG("A8: bpwp enable, vr %08x cr %08x",
 613                         (unsigned) vr, (unsigned) cr);
 614
 615         retval = cortex_a8_dap_write_memap_register_u32(dpm->arm->target,
 616                         vr, addr);
 617         if (retval != ERROR_OK)
 618                 return retval;
 619         retval = cortex_a8_dap_write_memap_register_u32(dpm->arm->target,
 620                         cr, control);
 621         return retval;
 622 }
 623
 624 static int cortex_a8_bpwp_disable(struct arm_dpm *dpm, unsigned index_t)
 625 {
 626         struct cortex_a8_common *a8 = dpm_to_a8(dpm);
 627         uint32_t cr;
 628
 629         switch (index_t) {
 630         case 0 ... 15:
 631                 cr = a8->armv7a_common.debug_base + CPUDBG_BCR_BASE;
 632                 break;
 633         case 16 ... 31:
 634                 cr = a8->armv7a_common.debug_base + CPUDBG_WCR_BASE;
 635                 index_t -= 16;
 636                 break;
 637         default:
 638                 return ERROR_FAIL;
 639         }
 640         cr += 4 * index_t;
 641
 642         LOG_DEBUG("A8: bpwp disable, cr %08x", (unsigned) cr);
 643
 644         /* clear control register */
 645         return cortex_a8_dap_write_memap_register_u32(dpm->arm->target, cr, 0);
 646 }
 647
 648 static int cortex_a8_dpm_setup(struct cortex_a8_common *a8, uint32_t didr)
 649 {
 650         struct arm_dpm *dpm = &a8->armv7a_common.dpm;
 651         int retval;
 652
 653         dpm->arm = &a8->armv7a_common.armv4_5_common;
 654         dpm->didr = didr;
 655
 656         dpm->prepare = cortex_a8_dpm_prepare;
 657         dpm->finish = cortex_a8_dpm_finish;
 658
 659         dpm->instr_write_data_dcc = cortex_a8_instr_write_data_dcc;
 660         dpm->instr_write_data_r0 = cortex_a8_instr_write_data_r0;
 661         dpm->instr_cpsr_sync = cortex_a8_instr_cpsr_sync;
 662
 663         dpm->instr_read_data_dcc = cortex_a8_instr_read_data_dcc;
 664         dpm->instr_read_data_r0 = cortex_a8_instr_read_data_r0;
 665
 666         dpm->bpwp_enable = cortex_a8_bpwp_enable;
 667         dpm->bpwp_disable = cortex_a8_bpwp_disable;
 668
 669         retval = arm_dpm_setup(dpm);
 670         if (retval == ERROR_OK)
 671                 retval = arm_dpm_initialize(dpm);
 672
 673         return retval;
 674 }
 675
 676
 677 /*
 678  * Cortex-A8 Run control
 679  */
 680
 681 static int cortex_a8_poll(struct target *target)
 682 {
 683         int retval = ERROR_OK;
 684         uint32_t dscr;
 685         struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
 686         struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
 687         struct adiv5_dap *swjdp = &armv7a->dap;
 688         enum target_state prev_target_state = target->state;
 689         uint8_t saved_apsel = dap_ap_get_select(swjdp);
 690
 691         dap_ap_select(swjdp, swjdp_debugap);
 692         retval = mem_ap_read_atomic_u32(swjdp,
 693                         armv7a->debug_base + CPUDBG_DSCR, &dscr);
 694         if (retval != ERROR_OK)
 695         {
 696                 dap_ap_select(swjdp, saved_apsel);
 697                 return retval;
 698         }
 699         cortex_a8->cpudbg_dscr = dscr;
 700
 701         if ((dscr & 0x3) == 0x3)
 702         {
 703                 if (prev_target_state != TARGET_HALTED)
 704                 {
 705                         /* We have a halting debug event */
 706                         LOG_DEBUG("Target halted");
 707                         target->state = TARGET_HALTED;
 708                         if ((prev_target_state == TARGET_RUNNING)
 709                                         || (prev_target_state == TARGET_RESET))
 710                         {
 711                                 retval = cortex_a8_debug_entry(target);
 712                                 if (retval != ERROR_OK)
 713                                         return retval;
 714
 715                                 target_call_event_callbacks(target,
 716                                                 TARGET_EVENT_HALTED);
 717                         }
 718                         if (prev_target_state == TARGET_DEBUG_RUNNING)
 719                         {
 720                                 LOG_DEBUG(" ");
 721
 722                                 retval = cortex_a8_debug_entry(target);
 723                                 if (retval != ERROR_OK)
 724                                         return retval;
 725
 726                                 target_call_event_callbacks(target,
 727                                                 TARGET_EVENT_DEBUG_HALTED);
 728                         }
 729                 }
 730         }
 731         else if ((dscr & 0x3) == 0x2)
 732         {
 733                 target->state = TARGET_RUNNING;
 734         }
 735         else
 736         {
 737                 LOG_DEBUG("Unknown target state dscr = 0x%08" PRIx32, dscr);
 738                 target->state = TARGET_UNKNOWN;
 739         }
 740
 741         dap_ap_select(swjdp, saved_apsel);
 742
 743         return retval;
 744 }
 745
 746 static int cortex_a8_halt(struct target *target)
 747 {
 748         int retval = ERROR_OK;
 749         uint32_t dscr;
 750         struct armv7a_common *armv7a = target_to_armv7a(target);
 751         struct adiv5_dap *swjdp = &armv7a->dap;
 752         uint8_t saved_apsel = dap_ap_get_select(swjdp);
 753         dap_ap_select(swjdp, swjdp_debugap);
 754
 755         /*
 756          * Tell the core to be halted by writing DRCR with 0x1
 757          * and then wait for the core to be halted.
 758          */
 759         retval = mem_ap_write_atomic_u32(swjdp,
 760                         armv7a->debug_base + CPUDBG_DRCR, 0x1);
 761         if (retval != ERROR_OK)
 762                 goto out;
 763
 764         /*
 765          * enter halting debug mode
 766          */
 767         retval = mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_DSCR, &dscr);
 768         if (retval != ERROR_OK)
 769                 goto out;
 770
 771         retval = mem_ap_write_atomic_u32(swjdp,
 772                 armv7a->debug_base + CPUDBG_DSCR, dscr | DSCR_HALT_DBG_MODE);
 773         if (retval != ERROR_OK)
 774                 goto out;
 775
 776         long long then = timeval_ms();
 777         for (;;)
 778         {
 779                 retval = mem_ap_read_atomic_u32(swjdp,
 780                         armv7a->debug_base + CPUDBG_DSCR, &dscr);
 781                 if (retval != ERROR_OK)
 782                         goto out;
 783                 if ((dscr & DSCR_CORE_HALTED) != 0)
 784                 {
 785                         break;
 786                 }
 787                 if (timeval_ms() > then + 1000)
 788                 {
 789                         LOG_ERROR("Timeout waiting for halt");
 790                         return ERROR_FAIL;
 791                 }
 792         }
 793
 794         target->debug_reason = DBG_REASON_DBGRQ;
 795
 796 out:
 797         dap_ap_select(swjdp, saved_apsel);
 798         return retval;
 799 }
 800
 801 static int cortex_a8_resume(struct target *target, int current,
 802                 uint32_t address, int handle_breakpoints, int debug_execution)
 803 {
 804         struct armv7a_common *armv7a = target_to_armv7a(target);
 805         struct arm *armv4_5 = &armv7a->armv4_5_common;
 806         struct adiv5_dap *swjdp = &armv7a->dap;
 807         int retval;
 808
 809 //      struct breakpoint *breakpoint = NULL;
 810         uint32_t resume_pc, dscr;
 811
 812         uint8_t saved_apsel = dap_ap_get_select(swjdp);
 813         dap_ap_select(swjdp, swjdp_debugap);
 814
 815         if (!debug_execution)
 816                 target_free_all_working_areas(target);
 817
 818 #if 0
 819         if (debug_execution)
 820         {
 821                 /* Disable interrupts */
 822                 /* We disable interrupts in the PRIMASK register instead of
 823                  * masking with C_MASKINTS,
 824                  * This is probably the same issue as Cortex-M3 Errata 377493:
 825                  * C_MASKINTS in parallel with disabled interrupts can cause
 826                  * local faults to not be taken. */
 827                 buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_PRIMASK].value, 0, 32, 1);
 828                 armv7m->core_cache->reg_list[ARMV7M_PRIMASK].dirty = 1;
 829                 armv7m->core_cache->reg_list[ARMV7M_PRIMASK].valid = 1;
 830
 831                 /* Make sure we are in Thumb mode */
 832                 buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32,
 833                         buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32) | (1 << 24));
 834                 armv7m->core_cache->reg_list[ARMV7M_xPSR].dirty = 1;
 835                 armv7m->core_cache->reg_list[ARMV7M_xPSR].valid = 1;
 836         }
 837 #endif
 838
 839         /* current = 1: continue on current pc, otherwise continue at <address> */
 840         resume_pc = buf_get_u32(armv4_5->pc->value, 0, 32);
 841         if (!current)
 842                 resume_pc = address;
 843
 844         /* Make sure that the Armv7 gdb thumb fixups does not
 845          * kill the return address
 846          */
 847         switch (armv4_5->core_state)
 848         {
 849         case ARM_STATE_ARM:
 850                 resume_pc &= 0xFFFFFFFC;
 851                 break;
 852         case ARM_STATE_THUMB:
 853         case ARM_STATE_THUMB_EE:
 854                 /* When the return address is loaded into PC
 855                  * bit 0 must be 1 to stay in Thumb state
 856                  */
 857                 resume_pc |= 0x1;
 858                 break;
 859         case ARM_STATE_JAZELLE:
 860                 LOG_ERROR("How do I resume into Jazelle state??");
 861                 return ERROR_FAIL;
 862         }
 863         LOG_DEBUG("resume pc = 0x%08" PRIx32, resume_pc);
 864         buf_set_u32(armv4_5->pc->value, 0, 32, resume_pc);
 865         armv4_5->pc->dirty = 1;
 866         armv4_5->pc->valid = 1;
 867
 868         retval = cortex_a8_restore_context(target, handle_breakpoints);
 869         if (retval != ERROR_OK)
 870                 return retval;
 871
 872 #if 0
 873         /* the front-end may request us not to handle breakpoints */
 874         if (handle_breakpoints)
 875         {
 876                 /* Single step past breakpoint at current address */
 877                 if ((breakpoint = breakpoint_find(target, resume_pc)))
 878                 {
 879                         LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address);
 880                         cortex_m3_unset_breakpoint(target, breakpoint);
 881                         cortex_m3_single_step_core(target);
 882                         cortex_m3_set_breakpoint(target, breakpoint);
 883                 }
 884         }
 885
 886 #endif
 887         /* Restart core and wait for it to be started
 888          * NOTE: this clears DSCR_ITR_EN and other bits.
 889          *
 890          * REVISIT: for single stepping, we probably want to
 891          * disable IRQs by default, with optional override...
 892          */
 893         retval = mem_ap_write_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_DRCR, 0x2);
 894         if (retval != ERROR_OK)
 895                 return retval;
 896
 897         long long then = timeval_ms();
 898         for (;;)
 899         {
 900                 retval = mem_ap_read_atomic_u32(swjdp,
 901                         armv7a->debug_base + CPUDBG_DSCR, &dscr);
 902                 if (retval != ERROR_OK)
 903                         return retval;
 904                 if ((dscr & DSCR_CORE_RESTARTED) != 0)
 905                         break;
 906                 if (timeval_ms() > then + 1000)
 907                 {
 908                         LOG_ERROR("Timeout waiting for resume");
 909                         return ERROR_FAIL;
 910                 }
 911         }
 912
 913         target->debug_reason = DBG_REASON_NOTHALTED;
 914         target->state = TARGET_RUNNING;
 915
 916         /* registers are now invalid */
 917         register_cache_invalidate(armv4_5->core_cache);
 918
 919         if (!debug_execution)
 920         {
 921                 target->state = TARGET_RUNNING;
 922                 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
 923                 LOG_DEBUG("target resumed at 0x%" PRIx32, resume_pc);
 924         }
 925         else
 926         {
 927                 target->state = TARGET_DEBUG_RUNNING;
 928                 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
 929                 LOG_DEBUG("target debug resumed at 0x%" PRIx32, resume_pc);
 930         }
 931
 932         dap_ap_select(swjdp, saved_apsel);
 933
 934         return ERROR_OK;
 935 }
 936
 937 static int cortex_a8_debug_entry(struct target *target)
 938 {
 939         int i;
 940         uint32_t regfile[16], cpsr, dscr;
 941         int retval = ERROR_OK;
 942         struct working_area *regfile_working_area = NULL;
 943         struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
 944         struct armv7a_common *armv7a = target_to_armv7a(target);
 945         struct arm *armv4_5 = &armv7a->armv4_5_common;
 946         struct adiv5_dap *swjdp = &armv7a->dap;
 947         struct reg *reg;
 948
 949         LOG_DEBUG("dscr = 0x%08" PRIx32, cortex_a8->cpudbg_dscr);
 950
 951         /* REVISIT surely we should not re-read DSCR !! */
 952         retval = mem_ap_read_atomic_u32(swjdp,
 953                                 armv7a->debug_base + CPUDBG_DSCR, &dscr);
 954         if (retval != ERROR_OK)
 955                 return retval;
 956
 957         /* REVISIT see A8 TRM 12.11.4 steps 2..3 -- make sure that any
 958          * imprecise data aborts get discarded by issuing a Data
 959          * Synchronization Barrier:  ARMV4_5_MCR(15, 0, 0, 7, 10, 4).
 960          */
 961
 962         /* Enable the ITR execution once we are in debug mode */
 963         dscr |= DSCR_ITR_EN;
 964         retval = mem_ap_write_atomic_u32(swjdp,
 965                         armv7a->debug_base + CPUDBG_DSCR, dscr);
 966         if (retval != ERROR_OK)
 967                 return retval;
 968
 969         /* Examine debug reason */
 970         arm_dpm_report_dscr(&armv7a->dpm, cortex_a8->cpudbg_dscr);
 971
 972         /* save address of instruction that triggered the watchpoint? */
 973         if (target->debug_reason == DBG_REASON_WATCHPOINT) {
 974                 uint32_t wfar;
 975
 976                 retval = mem_ap_read_atomic_u32(swjdp,
 977                                 armv7a->debug_base + CPUDBG_WFAR,
 978                                 &wfar);
 979                 if (retval != ERROR_OK)
 980                         return retval;
 981                 arm_dpm_report_wfar(&armv7a->dpm, wfar);
 982         }
 983
 984         /* REVISIT fast_reg_read is never set ... */
 985
 986         /* Examine target state and mode */
 987         if (cortex_a8->fast_reg_read)
 988                 target_alloc_working_area(target, 64, &regfile_working_area);
 989
 990         /* First load register acessible through core debug port*/
 991         if (!regfile_working_area)
 992         {
 993                 retval = arm_dpm_read_current_registers(&armv7a->dpm);
 994         }
 995         else
 996         {
 997                 dap_ap_select(swjdp, swjdp_memoryap);
 998                 retval = cortex_a8_read_regs_through_mem(target,
 999                                 regfile_working_area->address, regfile);
1000                 dap_ap_select(swjdp, swjdp_memoryap);
1001                 target_free_working_area(target, regfile_working_area);
1002                 if (retval != ERROR_OK)
1003                 {
1004                         return retval;
1005                 }
1006
1007                 /* read Current PSR */
1008                 retval = cortex_a8_dap_read_coreregister_u32(target, &cpsr, 16);
1009                 if (retval != ERROR_OK)
1010                         return retval;
1011                 dap_ap_select(swjdp, swjdp_debugap);
1012                 LOG_DEBUG("cpsr: %8.8" PRIx32, cpsr);
1013
1014                 arm_set_cpsr(armv4_5, cpsr);
1015
1016                 /* update cache */
1017                 for (i = 0; i <= ARM_PC; i++)
1018                 {
1019                         reg = arm_reg_current(armv4_5, i);
1020
1021                         buf_set_u32(reg->value, 0, 32, regfile[i]);
1022                         reg->valid = 1;
1023                         reg->dirty = 0;
1024                 }
1025
1026                 /* Fixup PC Resume Address */
1027                 if (cpsr & (1 << 5))
1028                 {
1029                         // T bit set for Thumb or ThumbEE state
1030                         regfile[ARM_PC] -= 4;
1031                 }
1032                 else
1033                 {
1034                         // ARM state
1035                         regfile[ARM_PC] -= 8;
1036                 }
1037
1038                 reg = armv4_5->pc;
1039                 buf_set_u32(reg->value, 0, 32, regfile[ARM_PC]);
1040                 reg->dirty = reg->valid;
1041         }
1042
1043 #if 0
1044 /* TODO, Move this */
1045         uint32_t cp15_control_register, cp15_cacr, cp15_nacr;
1046         cortex_a8_read_cp(target, &cp15_control_register, 15, 0, 1, 0, 0);
1047         LOG_DEBUG("cp15_control_register = 0x%08x", cp15_control_register);
1048
1049         cortex_a8_read_cp(target, &cp15_cacr, 15, 0, 1, 0, 2);
1050         LOG_DEBUG("cp15 Coprocessor Access Control Register = 0x%08x", cp15_cacr);
1051
1052         cortex_a8_read_cp(target, &cp15_nacr, 15, 0, 1, 1, 2);
1053         LOG_DEBUG("cp15 Nonsecure Access Control Register = 0x%08x", cp15_nacr);
1054 #endif
1055
1056         /* Are we in an exception handler */
1057 //      armv4_5->exception_number = 0;
1058         if (armv7a->post_debug_entry)
1059         {
1060                 retval = armv7a->post_debug_entry(target);
1061                 if (retval != ERROR_OK)
1062                         return retval;
1063         }
1064
1065         return retval;
1066 }
1067
1068 static int cortex_a8_post_debug_entry(struct target *target)
1069 {
1070         struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
1071         struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
1072         int retval;
1073
1074         /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
1075         retval = armv7a->armv4_5_common.mrc(target, 15,
1076                         0, 0,   /* op1, op2 */
1077                         1, 0,   /* CRn, CRm */
1078                         &cortex_a8->cp15_control_reg);
1079         if (retval != ERROR_OK)
1080                 return retval;
1081         LOG_DEBUG("cp15_control_reg: %8.8" PRIx32, cortex_a8->cp15_control_reg);
1082
1083         if (armv7a->armv4_5_mmu.armv4_5_cache.ctype == -1)
1084         {
1085                 uint32_t cache_type_reg;
1086
1087                 /* MRC p15,0,<Rt>,c0,c0,1 ; Read CP15 Cache Type Register */
1088                 retval = armv7a->armv4_5_common.mrc(target, 15,
1089                                 0, 1,   /* op1, op2 */
1090                                 0, 0,   /* CRn, CRm */
1091                                 &cache_type_reg);
1092                 if (retval != ERROR_OK)
1093                         return retval;
1094                 LOG_DEBUG("cp15 cache type: %8.8x", (unsigned) cache_type_reg);
1095
1096                 /* FIXME the armv4_4 cache info DOES NOT APPLY to Cortex-A8 */
1097                 armv4_5_identify_cache(cache_type_reg,
1098                                 &armv7a->armv4_5_mmu.armv4_5_cache);
1099         }
1100
1101         armv7a->armv4_5_mmu.mmu_enabled =
1102                         (cortex_a8->cp15_control_reg & 0x1U) ? 1 : 0;
1103         armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled =
1104                         (cortex_a8->cp15_control_reg & 0x4U) ? 1 : 0;
1105         armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled =
1106                         (cortex_a8->cp15_control_reg & 0x1000U) ? 1 : 0;
1107
1108         return ERROR_OK;
1109 }
1110
1111 static int cortex_a8_step(struct target *target, int current, uint32_t address,
1112                 int handle_breakpoints)
1113 {
1114         struct armv7a_common *armv7a = target_to_armv7a(target);
1115         struct arm *armv4_5 = &armv7a->armv4_5_common;
1116         struct breakpoint *breakpoint = NULL;
1117         struct breakpoint stepbreakpoint;
1118         struct reg *r;
1119         int retval;
1120
1121         if (target->state != TARGET_HALTED)
1122         {
1123                 LOG_WARNING("target not halted");
1124                 return ERROR_TARGET_NOT_HALTED;
1125         }
1126
1127         /* current = 1: continue on current pc, otherwise continue at <address> */
1128         r = armv4_5->pc;
1129         if (!current)
1130         {
1131                 buf_set_u32(r->value, 0, 32, address);
1132         }
1133         else
1134         {
1135                 address = buf_get_u32(r->value, 0, 32);
1136         }
1137
1138         /* The front-end may request us not to handle breakpoints.
1139          * But since Cortex-A8 uses breakpoint for single step,
1140          * we MUST handle breakpoints.
1141          */
1142         handle_breakpoints = 1;
1143         if (handle_breakpoints) {
1144                 breakpoint = breakpoint_find(target, address);
1145                 if (breakpoint)
1146                         cortex_a8_unset_breakpoint(target, breakpoint);
1147         }
1148
1149         /* Setup single step breakpoint */
1150         stepbreakpoint.address = address;
1151         stepbreakpoint.length = (armv4_5->core_state == ARM_STATE_THUMB)
1152                         ? 2 : 4;
1153         stepbreakpoint.type = BKPT_HARD;
1154         stepbreakpoint.set = 0;
1155
1156         /* Break on IVA mismatch */
1157         cortex_a8_set_breakpoint(target, &stepbreakpoint, 0x04);
1158
1159         target->debug_reason = DBG_REASON_SINGLESTEP;
1160
1161         retval = cortex_a8_resume(target, 1, address, 0, 0);
1162         if (retval != ERROR_OK)
1163                 return retval;
1164
1165         long long then = timeval_ms();
1166         while (target->state != TARGET_HALTED)
1167         {
1168                 retval = cortex_a8_poll(target);
1169                 if (retval != ERROR_OK)
1170                         return retval;
1171                 if (timeval_ms() > then + 1000)
1172                 {
1173                         LOG_ERROR("timeout waiting for target halt");
1174                         return ERROR_FAIL;
1175                 }
1176         }
1177
1178         cortex_a8_unset_breakpoint(target, &stepbreakpoint);
1179
1180         target->debug_reason = DBG_REASON_BREAKPOINT;
1181
1182         if (breakpoint)
1183                 cortex_a8_set_breakpoint(target, breakpoint, 0);
1184
1185         if (target->state != TARGET_HALTED)
1186                 LOG_DEBUG("target stepped");
1187
1188         return ERROR_OK;
1189 }
1190
1191 static int cortex_a8_restore_context(struct target *target, bool bpwp)
1192 {
1193         struct armv7a_common *armv7a = target_to_armv7a(target);
1194
1195         LOG_DEBUG(" ");
1196
1197         if (armv7a->pre_restore_context)
1198                 armv7a->pre_restore_context(target);
1199
1200         return arm_dpm_write_dirty_registers(&armv7a->dpm, bpwp);
1201 }
1202
1203
1204 /*
1205  * Cortex-A8 Breakpoint and watchpoint functions
1206  */
1207
1208 /* Setup hardware Breakpoint Register Pair */
1209 static int cortex_a8_set_breakpoint(struct target *target,
1210                 struct breakpoint *breakpoint, uint8_t matchmode)
1211 {
1212         int retval;
1213         int brp_i=0;
1214         uint32_t control;
1215         uint8_t byte_addr_select = 0x0F;
1216         struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
1217         struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
1218         struct cortex_a8_brp * brp_list = cortex_a8->brp_list;
1219
1220         if (breakpoint->set)
1221         {
1222                 LOG_WARNING("breakpoint already set");
1223                 return ERROR_OK;
1224         }
1225
1226         if (breakpoint->type == BKPT_HARD)
1227         {
1228                 while (brp_list[brp_i].used && (brp_i < cortex_a8->brp_num))
1229                         brp_i++ ;
1230                 if (brp_i >= cortex_a8->brp_num)
1231                 {
1232                         LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1233                         return ERROR_FAIL;
1234                 }
1235                 breakpoint->set = brp_i + 1;
1236                 if (breakpoint->length == 2)
1237                 {
1238                         byte_addr_select = (3 << (breakpoint->address & 0x02));
1239                 }
1240                 control = ((matchmode & 0x7) << 20)
1241                                 | (byte_addr_select << 5)
1242                                 | (3 << 1) | 1;
1243                 brp_list[brp_i].used = 1;
1244                 brp_list[brp_i].value = (breakpoint->address & 0xFFFFFFFC);
1245                 brp_list[brp_i].control = control;
1246                 retval = cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
1247                                 + CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
1248                                 brp_list[brp_i].value);
1249                 if (retval != ERROR_OK)
1250                         return retval;
1251                 retval = cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
1252                                 + CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
1253                                 brp_list[brp_i].control);
1254                 if (retval != ERROR_OK)
1255                         return retval;
1256                 LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%0" PRIx32, brp_i,
1257                                 brp_list[brp_i].control,
1258                                 brp_list[brp_i].value);
1259         }
1260         else if (breakpoint->type == BKPT_SOFT)
1261         {
1262                 uint8_t code[4];
1263                 if (breakpoint->length == 2)
1264                 {
1265                         buf_set_u32(code, 0, 32, ARMV5_T_BKPT(0x11));
1266                 }
1267                 else
1268                 {
1269                         buf_set_u32(code, 0, 32, ARMV5_BKPT(0x11));
1270                 }
1271                 retval = target->type->read_memory(target,
1272                                 breakpoint->address & 0xFFFFFFFE,
1273                                 breakpoint->length, 1,
1274                                 breakpoint->orig_instr);
1275                 if (retval != ERROR_OK)
1276                         return retval;
1277                 retval = target->type->write_memory(target,
1278                                 breakpoint->address & 0xFFFFFFFE,
1279                                 breakpoint->length, 1, code);
1280                 if (retval != ERROR_OK)
1281                         return retval;
1282                 breakpoint->set = 0x11; /* Any nice value but 0 */
1283         }
1284
1285         return ERROR_OK;
1286 }
1287
1288 static int cortex_a8_unset_breakpoint(struct target *target, struct breakpoint *breakpoint)
1289 {
1290         int retval;
1291         struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
1292         struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
1293         struct cortex_a8_brp * brp_list = cortex_a8->brp_list;
1294
1295         if (!breakpoint->set)
1296         {
1297                 LOG_WARNING("breakpoint not set");
1298                 return ERROR_OK;
1299         }
1300
1301         if (breakpoint->type == BKPT_HARD)
1302         {
1303                 int brp_i = breakpoint->set - 1;
1304                 if ((brp_i < 0) || (brp_i >= cortex_a8->brp_num))
1305                 {
1306                         LOG_DEBUG("Invalid BRP number in breakpoint");
1307                         return ERROR_OK;
1308                 }
1309                 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx32, brp_i,
1310                                 brp_list[brp_i].control, brp_list[brp_i].value);
1311                 brp_list[brp_i].used = 0;
1312                 brp_list[brp_i].value = 0;
1313                 brp_list[brp_i].control = 0;
1314                 retval = cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
1315                                 + CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
1316                                 brp_list[brp_i].control);
1317                 if (retval != ERROR_OK)
1318                         return retval;
1319                 retval = cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
1320                                 + CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
1321                                 brp_list[brp_i].value);
1322                 if (retval != ERROR_OK)
1323                         return retval;
1324         }
1325         else
1326         {
1327                 /* restore original instruction (kept in target endianness) */
1328                 if (breakpoint->length == 4)
1329                 {
1330                         retval = target->type->write_memory(target,
1331                                         breakpoint->address & 0xFFFFFFFE,
1332                                         4, 1, breakpoint->orig_instr);
1333                         if (retval != ERROR_OK)
1334                                 return retval;
1335                 }
1336                 else
1337                 {
1338                         retval = target->type->write_memory(target,
1339                                         breakpoint->address & 0xFFFFFFFE,
1340                                         2, 1, breakpoint->orig_instr);
1341                         if (retval != ERROR_OK)
1342                                 return retval;
1343                 }
1344         }
1345         breakpoint->set = 0;
1346
1347         return ERROR_OK;
1348 }
1349
1350 static int cortex_a8_add_breakpoint(struct target *target,
1351                 struct breakpoint *breakpoint)
1352 {
1353         struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
1354
1355         if ((breakpoint->type == BKPT_HARD) && (cortex_a8->brp_num_available < 1))
1356         {
1357                 LOG_INFO("no hardware breakpoint available");
1358                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1359         }
1360
1361         if (breakpoint->type == BKPT_HARD)
1362                 cortex_a8->brp_num_available--;
1363         cortex_a8_set_breakpoint(target, breakpoint, 0x00); /* Exact match */
1364
1365         return ERROR_OK;
1366 }
1367
1368 static int cortex_a8_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
1369 {
1370         struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
1371
1372 #if 0
1373 /* It is perfectly possible to remove breakpoints while the target is running */
1374         if (target->state != TARGET_HALTED)
1375         {
1376                 LOG_WARNING("target not halted");
1377                 return ERROR_TARGET_NOT_HALTED;
1378         }
1379 #endif
1380
1381         if (breakpoint->set)
1382         {
1383                 cortex_a8_unset_breakpoint(target, breakpoint);
1384                 if (breakpoint->type == BKPT_HARD)
1385                         cortex_a8->brp_num_available++ ;
1386         }
1387
1388
1389         return ERROR_OK;
1390 }
1391
1392
1393
1394 /*
1395  * Cortex-A8 Reset functions
1396  */
1397
1398 static int cortex_a8_assert_reset(struct target *target)
1399 {
1400         struct armv7a_common *armv7a = target_to_armv7a(target);
1401
1402         LOG_DEBUG(" ");
1403
1404         /* FIXME when halt is requested, make it work somehow... */
1405
1406         /* Issue some kind of warm reset. */
1407         if (target_has_event_action(target, TARGET_EVENT_RESET_ASSERT)) {
1408                 target_handle_event(target, TARGET_EVENT_RESET_ASSERT);
1409         } else if (jtag_get_reset_config() & RESET_HAS_SRST) {
1410                 /* REVISIT handle "pulls" cases, if there's
1411                  * hardware that needs them to work.
1412                  */
1413                 jtag_add_reset(0, 1);
1414         } else {
1415                 LOG_ERROR("%s: how to reset?", target_name(target));
1416                 return ERROR_FAIL;
1417         }
1418
1419         /* registers are now invalid */
1420         register_cache_invalidate(armv7a->armv4_5_common.core_cache);
1421
1422         target->state = TARGET_RESET;
1423
1424         return ERROR_OK;
1425 }
1426
1427 static int cortex_a8_deassert_reset(struct target *target)
1428 {
1429         int retval;
1430
1431         LOG_DEBUG(" ");
1432
1433         /* be certain SRST is off */
1434         jtag_add_reset(0, 0);
1435
1436         retval = cortex_a8_poll(target);
1437         if (retval != ERROR_OK)
1438                 return retval;
1439
1440         if (target->reset_halt) {
1441                 if (target->state != TARGET_HALTED) {
1442                         LOG_WARNING("%s: ran after reset and before halt ...",
1443                                         target_name(target));
1444                         if ((retval = target_halt(target)) != ERROR_OK)
1445                                 return retval;
1446                 }
1447         }
1448
1449         return ERROR_OK;
1450 }
1451
1452 /*
1453  * Cortex-A8 Memory access
1454  *
1455  * This is same Cortex M3 but we must also use the correct
1456  * ap number for every access.
1457  */
1458
1459 static int cortex_a8_read_phys_memory(struct target *target,
1460                 uint32_t address, uint32_t size,
1461                 uint32_t count, uint8_t *buffer)
1462 {
1463         struct armv7a_common *armv7a = target_to_armv7a(target);
1464         struct adiv5_dap *swjdp = &armv7a->dap;
1465         int retval = ERROR_INVALID_ARGUMENTS;
1466
1467         /* cortex_a8 handles unaligned memory access */
1468
1469 // ???  dap_ap_select(swjdp, swjdp_memoryap);
1470         LOG_DEBUG("Reading memory at real address 0x%x; size %d; count %d", address, size, count);
1471         if (count && buffer) {
1472                 switch (size) {
1473                 case 4:
1474                         retval = mem_ap_read_buf_u32(swjdp, buffer, 4 * count, address);
1475                         break;
1476                 case 2:
1477                         retval = mem_ap_read_buf_u16(swjdp, buffer, 2 * count, address);
1478                         break;
1479                 case 1:
1480                         retval = mem_ap_read_buf_u8(swjdp, buffer, count, address);
1481                         break;
1482                 }
1483         }
1484
1485         return retval;
1486 }
1487
1488 static int cortex_a8_read_memory(struct target *target, uint32_t address,
1489                 uint32_t size, uint32_t count, uint8_t *buffer)
1490 {
1491         int enabled = 0;
1492         uint32_t virt, phys;
1493         int retval;
1494
1495         /* cortex_a8 handles unaligned memory access */
1496
1497 // ???  dap_ap_select(swjdp, swjdp_memoryap);
1498         LOG_DEBUG("Reading memory at address 0x%x; size %d; count %d", address, size, count);
1499         retval = cortex_a8_mmu(target, &enabled);
1500         if (retval != ERROR_OK)
1501                 return retval;
1502
1503         if(enabled)
1504         {
1505             virt = address;
1506             retval = cortex_a8_virt2phys(target, virt, &phys);
1507             if (retval != ERROR_OK)
1508                 return retval;
1509
1510             LOG_DEBUG("Reading at virtual address. Translating v:0x%x to r:0x%x", virt, phys);
1511             address = phys;
1512         }
1513
1514         return cortex_a8_read_phys_memory(target, address, size, count, buffer);
1515 }
1516
1517 static int cortex_a8_write_phys_memory(struct target *target,
1518                 uint32_t address, uint32_t size,
1519                 uint32_t count, uint8_t *buffer)
1520 {
1521         struct armv7a_common *armv7a = target_to_armv7a(target);
1522         struct adiv5_dap *swjdp = &armv7a->dap;
1523         int retval = ERROR_INVALID_ARGUMENTS;
1524
1525 // ???  dap_ap_select(swjdp, swjdp_memoryap);
1526
1527         LOG_DEBUG("Writing memory to real address 0x%x; size %d; count %d", address, size, count);
1528         if (count && buffer) {
1529                 switch (size) {
1530                 case 4:
1531                         retval = mem_ap_write_buf_u32(swjdp, buffer, 4 * count, address);
1532                         break;
1533                 case 2:
1534                         retval = mem_ap_write_buf_u16(swjdp, buffer, 2 * count, address);
1535                         break;
1536                 case 1:
1537                         retval = mem_ap_write_buf_u8(swjdp, buffer, count, address);
1538                         break;
1539                 }
1540         }
1541
1542         /* REVISIT this op is generic ARMv7-A/R stuff */
1543         if (retval == ERROR_OK && target->state == TARGET_HALTED)
1544         {
1545                 struct arm_dpm *dpm = armv7a->armv4_5_common.dpm;
1546
1547                 retval = dpm->prepare(dpm);
1548                 if (retval != ERROR_OK)
1549                         return retval;
1550
1551                 /* The Cache handling will NOT work with MMU active, the
1552                  * wrong addresses will be invalidated!
1553                  *
1554                  * For both ICache and DCache, walk all cache lines in the
1555                  * address range. Cortex-A8 has fixed 64 byte line length.
1556                  *
1557                  * REVISIT per ARMv7, these may trigger watchpoints ...
1558                  */
1559
1560                 /* invalidate I-Cache */
1561                 if (armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled)
1562                 {
1563                         /* ICIMVAU - Invalidate Cache single entry
1564                          * with MVA to PoU
1565                          *      MCR p15, 0, r0, c7, c5, 1
1566                          */
1567                         for (uint32_t cacheline = address;
1568                                         cacheline < address + size * count;
1569                                         cacheline += 64) {
1570                                 retval = dpm->instr_write_data_r0(dpm,
1571                                         ARMV4_5_MCR(15, 0, 0, 7, 5, 1),
1572                                         cacheline);
1573                                 if (retval != ERROR_OK)
1574                                         return retval;
1575                         }
1576                 }
1577
1578                 /* invalidate D-Cache */
1579                 if (armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled)
1580                 {
1581                         /* DCIMVAC - Invalidate data Cache line
1582                          * with MVA to PoC
1583                          *      MCR p15, 0, r0, c7, c6, 1
1584                          */
1585                         for (uint32_t cacheline = address;
1586                                         cacheline < address + size * count;
1587                                         cacheline += 64) {
1588                                 retval = dpm->instr_write_data_r0(dpm,
1589                                         ARMV4_5_MCR(15, 0, 0, 7, 6, 1),
1590                                         cacheline);
1591                                 if (retval != ERROR_OK)
1592                                         return retval;
1593                         }
1594                 }
1595
1596                 /* (void) */ dpm->finish(dpm);
1597         }
1598
1599         return retval;
1600 }
1601
1602 static int cortex_a8_write_memory(struct target *target, uint32_t address,
1603                 uint32_t size, uint32_t count, uint8_t *buffer)
1604 {
1605         int enabled = 0;
1606         uint32_t virt, phys;
1607         int retval;
1608
1609 // ???  dap_ap_select(swjdp, swjdp_memoryap);
1610
1611         LOG_DEBUG("Writing memory to address 0x%x; size %d; count %d", address, size, count);
1612         retval = cortex_a8_mmu(target, &enabled);
1613         if (retval != ERROR_OK)
1614                 return retval;
1615         if(enabled)
1616         {
1617             virt = address;
1618             retval = cortex_a8_virt2phys(target, virt, &phys);
1619             if (retval != ERROR_OK)
1620                 return retval;
1621             LOG_DEBUG("Writing to virtual address. Translating v:0x%x to r:0x%x", virt, phys);
1622             address = phys;
1623         }
1624
1625         return cortex_a8_write_phys_memory(target, address, size,
1626                 count, buffer);
1627 }
1628
1629 static int cortex_a8_bulk_write_memory(struct target *target, uint32_t address,
1630                 uint32_t count, uint8_t *buffer)
1631 {
1632         return cortex_a8_write_memory(target, address, 4, count, buffer);
1633 }
1634
1635
1636 static int cortex_a8_dcc_read(struct adiv5_dap *swjdp, uint8_t *value, uint8_t *ctrl)
1637 {
1638 #if 0
1639         u16 dcrdr;
1640
1641         mem_ap_read_buf_u16(swjdp, (uint8_t*)&dcrdr, 1, DCB_DCRDR);
1642         *ctrl = (uint8_t)dcrdr;
1643         *value = (uint8_t)(dcrdr >> 8);
1644
1645         LOG_DEBUG("data 0x%x ctrl 0x%x", *value, *ctrl);
1646
1647         /* write ack back to software dcc register
1648          * signify we have read data */
1649         if (dcrdr & (1 << 0))
1650         {
1651                 dcrdr = 0;
1652                 mem_ap_write_buf_u16(swjdp, (uint8_t*)&dcrdr, 1, DCB_DCRDR);
1653         }
1654 #endif
1655         return ERROR_OK;
1656 }
1657
1658
1659 static int cortex_a8_handle_target_request(void *priv)
1660 {
1661         struct target *target = priv;
1662         struct armv7a_common *armv7a = target_to_armv7a(target);
1663         struct adiv5_dap *swjdp = &armv7a->dap;
1664         int retval;
1665
1666         if (!target_was_examined(target))
1667                 return ERROR_OK;
1668         if (!target->dbg_msg_enabled)
1669                 return ERROR_OK;
1670
1671         if (target->state == TARGET_RUNNING)
1672         {
1673                 uint8_t data = 0;
1674                 uint8_t ctrl = 0;
1675
1676                 retval = cortex_a8_dcc_read(swjdp, &data, &ctrl);
1677                 if (retval != ERROR_OK)
1678                         return retval;
1679
1680                 /* check if we have data */
1681                 if (ctrl & (1 << 0))
1682                 {
1683                         uint32_t request;
1684
1685                         /* we assume target is quick enough */
1686                         request = data;
1687                         retval = cortex_a8_dcc_read(swjdp, &data, &ctrl);
1688                         if (retval != ERROR_OK)
1689                                 return retval;
1690                         request |= (data << 8);
1691                         retval = cortex_a8_dcc_read(swjdp, &data, &ctrl);
1692                         if (retval != ERROR_OK)
1693                                 return retval;
1694                         request |= (data << 16);
1695                         retval = cortex_a8_dcc_read(swjdp, &data, &ctrl);
1696                         if (retval != ERROR_OK)
1697                                 return retval;
1698                         request |= (data << 24);
1699                         target_request(target, request);
1700                 }
1701         }
1702
1703         return ERROR_OK;
1704 }
1705
1706 /*
1707  * Cortex-A8 target information and configuration
1708  */
1709
1710 static int cortex_a8_examine_first(struct target *target)
1711 {
1712         struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
1713         struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
1714         struct adiv5_dap *swjdp = &armv7a->dap;
1715         int i;
1716         int retval = ERROR_OK;
1717         uint32_t didr, ctypr, ttypr, cpuid;
1718
1719         /* stop assuming this is an OMAP! */
1720         LOG_DEBUG("TODO - autoconfigure");
1721
1722         /* Here we shall insert a proper ROM Table scan */
1723         armv7a->debug_base = OMAP3530_DEBUG_BASE;
1724
1725         /* We do one extra read to ensure DAP is configured,
1726          * we call ahbap_debugport_init(swjdp) instead
1727          */
1728         retval = ahbap_debugport_init(swjdp);
1729         if (retval != ERROR_OK)
1730                 return retval;
1731
1732         retval = mem_ap_read_atomic_u32(swjdp, armv7a->debug_base + CPUDBG_CPUID, &cpuid);
1733         if (retval != ERROR_OK)
1734                 return retval;
1735
1736         if ((retval = mem_ap_read_atomic_u32(swjdp,
1737                         armv7a->debug_base + CPUDBG_CPUID, &cpuid)) != ERROR_OK)
1738         {
1739                 LOG_DEBUG("Examine %s failed", "CPUID");
1740                 return retval;
1741         }
1742
1743         if ((retval = mem_ap_read_atomic_u32(swjdp,
1744                         armv7a->debug_base + CPUDBG_CTYPR, &ctypr)) != ERROR_OK)
1745         {
1746                 LOG_DEBUG("Examine %s failed", "CTYPR");
1747                 return retval;
1748         }
1749
1750         if ((retval = mem_ap_read_atomic_u32(swjdp,
1751                         armv7a->debug_base + CPUDBG_TTYPR, &ttypr)) != ERROR_OK)
1752         {
1753                 LOG_DEBUG("Examine %s failed", "TTYPR");
1754                 return retval;
1755         }
1756
1757         if ((retval = mem_ap_read_atomic_u32(swjdp,
1758                         armv7a->debug_base + CPUDBG_DIDR, &didr)) != ERROR_OK)
1759         {
1760                 LOG_DEBUG("Examine %s failed", "DIDR");
1761                 return retval;
1762         }
1763
1764         LOG_DEBUG("cpuid = 0x%08" PRIx32, cpuid);
1765         LOG_DEBUG("ctypr = 0x%08" PRIx32, ctypr);
1766         LOG_DEBUG("ttypr = 0x%08" PRIx32, ttypr);
1767         LOG_DEBUG("didr = 0x%08" PRIx32, didr);
1768
1769         armv7a->armv4_5_common.core_type = ARM_MODE_MON;
1770         retval = cortex_a8_dpm_setup(cortex_a8, didr);
1771         if (retval != ERROR_OK)
1772                 return retval;
1773
1774         /* Setup Breakpoint Register Pairs */
1775         cortex_a8->brp_num = ((didr >> 24) & 0x0F) + 1;
1776         cortex_a8->brp_num_context = ((didr >> 20) & 0x0F) + 1;
1777         cortex_a8->brp_num_available = cortex_a8->brp_num;
1778         cortex_a8->brp_list = calloc(cortex_a8->brp_num, sizeof(struct cortex_a8_brp));
1779 //      cortex_a8->brb_enabled = ????;
1780         for (i = 0; i < cortex_a8->brp_num; i++)
1781         {
1782                 cortex_a8->brp_list[i].used = 0;
1783                 if (i < (cortex_a8->brp_num-cortex_a8->brp_num_context))
1784                         cortex_a8->brp_list[i].type = BRP_NORMAL;
1785                 else
1786                         cortex_a8->brp_list[i].type = BRP_CONTEXT;
1787                 cortex_a8->brp_list[i].value = 0;
1788                 cortex_a8->brp_list[i].control = 0;
1789                 cortex_a8->brp_list[i].BRPn = i;
1790         }
1791
1792         LOG_DEBUG("Configured %i hw breakpoints", cortex_a8->brp_num);
1793
1794         target_set_examined(target);
1795         return ERROR_OK;
1796 }
1797
1798 static int cortex_a8_examine(struct target *target)
1799 {
1800         int retval = ERROR_OK;
1801
1802         /* don't re-probe hardware after each reset */
1803         if (!target_was_examined(target))
1804                 retval = cortex_a8_examine_first(target);
1805
1806         /* Configure core debug access */
1807         if (retval == ERROR_OK)
1808                 retval = cortex_a8_init_debug_access(target);
1809
1810         return retval;
1811 }
1812
1813 /*
1814  *      Cortex-A8 target creation and initialization
1815  */
1816
1817 static int cortex_a8_init_target(struct command_context *cmd_ctx,
1818                 struct target *target)
1819 {
1820         /* examine_first() does a bunch of this */
1821         return ERROR_OK;
1822 }
1823
1824 static int cortex_a8_init_arch_info(struct target *target,
1825                 struct cortex_a8_common *cortex_a8, struct jtag_tap *tap)
1826 {
1827         struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
1828         struct arm *armv4_5 = &armv7a->armv4_5_common;
1829         struct adiv5_dap *dap = &armv7a->dap;
1830
1831         armv7a->armv4_5_common.dap = dap;
1832
1833         /* Setup struct cortex_a8_common */
1834         cortex_a8->common_magic = CORTEX_A8_COMMON_MAGIC;
1835         armv4_5->arch_info = armv7a;
1836
1837         /* prepare JTAG information for the new target */
1838         cortex_a8->jtag_info.tap = tap;
1839         cortex_a8->jtag_info.scann_size = 4;
1840
1841         /* Leave (only) generic DAP stuff for debugport_init() */
1842         dap->jtag_info = &cortex_a8->jtag_info;
1843         dap->memaccess_tck = 80;
1844
1845         /* Number of bits for tar autoincrement, impl. dep. at least 10 */
1846         dap->tar_autoincr_block = (1 << 10);
1847
1848         cortex_a8->fast_reg_read = 0;
1849
1850         /* Set default value */
1851         cortex_a8->current_address_mode = ARM_MODE_ANY;
1852
1853         /* register arch-specific functions */
1854         armv7a->examine_debug_reason = NULL;
1855
1856         armv7a->post_debug_entry = cortex_a8_post_debug_entry;
1857
1858         armv7a->pre_restore_context = NULL;
1859         armv7a->armv4_5_mmu.armv4_5_cache.ctype = -1;
1860         armv7a->armv4_5_mmu.get_ttb = cortex_a8_get_ttb;
1861         armv7a->armv4_5_mmu.read_memory = cortex_a8_read_phys_memory;
1862         armv7a->armv4_5_mmu.write_memory = cortex_a8_write_phys_memory;
1863         armv7a->armv4_5_mmu.disable_mmu_caches = cortex_a8_disable_mmu_caches;
1864         armv7a->armv4_5_mmu.enable_mmu_caches = cortex_a8_enable_mmu_caches;
1865         armv7a->armv4_5_mmu.has_tiny_pages = 1;
1866         armv7a->armv4_5_mmu.mmu_enabled = 0;
1867
1868
1869 //      arm7_9->handle_target_request = cortex_a8_handle_target_request;
1870
1871         /* REVISIT v7a setup should be in a v7a-specific routine */
1872         arm_init_arch_info(target, armv4_5);
1873         armv7a->common_magic = ARMV7_COMMON_MAGIC;
1874
1875         target_register_timer_callback(cortex_a8_handle_target_request, 1, 1, target);
1876
1877         return ERROR_OK;
1878 }
1879
1880 static int cortex_a8_target_create(struct target *target, Jim_Interp *interp)
1881 {
1882         struct cortex_a8_common *cortex_a8 = calloc(1, sizeof(struct cortex_a8_common));
1883
1884         return cortex_a8_init_arch_info(target, cortex_a8, target->tap);
1885 }
1886
1887 static int cortex_a8_get_ttb(struct target *target, uint32_t *result)
1888 {
1889         struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
1890     struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
1891     uint32_t ttb = 0, retval = ERROR_OK;
1892
1893     /* current_address_mode is set inside cortex_a8_virt2phys()
1894        where we can determine if address belongs to user or kernel */
1895     if(cortex_a8->current_address_mode == ARM_MODE_SVC)
1896     {
1897         /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
1898         retval = armv7a->armv4_5_common.mrc(target, 15,
1899                     0, 1,   /* op1, op2 */
1900                     2, 0,   /* CRn, CRm */
1901                     &ttb);
1902                 if (retval != ERROR_OK)
1903                         return retval;
1904     }
1905     else if(cortex_a8->current_address_mode == ARM_MODE_USR)
1906     {
1907         /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
1908         retval = armv7a->armv4_5_common.mrc(target, 15,
1909                     0, 0,   /* op1, op2 */
1910                     2, 0,   /* CRn, CRm */
1911                     &ttb);
1912                 if (retval != ERROR_OK)
1913                         return retval;
1914     }
1915     /* we don't know whose address is: user or kernel
1916        we assume that if we are in kernel mode then
1917        address belongs to kernel else if in user mode
1918        - to user */
1919     else if(armv7a->armv4_5_common.core_mode == ARM_MODE_SVC)
1920     {
1921         /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
1922         retval = armv7a->armv4_5_common.mrc(target, 15,
1923                     0, 1,   /* op1, op2 */
1924                     2, 0,   /* CRn, CRm */
1925                     &ttb);
1926                 if (retval != ERROR_OK)
1927                         return retval;
1928     }
1929     else if(armv7a->armv4_5_common.core_mode == ARM_MODE_USR)
1930     {
1931         /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
1932         retval = armv7a->armv4_5_common.mrc(target, 15,
1933                     0, 0,   /* op1, op2 */
1934                     2, 0,   /* CRn, CRm */
1935                     &ttb);
1936                 if (retval != ERROR_OK)
1937                         return retval;
1938     }
1939     /* finally we don't know whose ttb to use: user or kernel */
1940     else
1941         LOG_ERROR("Don't know how to get ttb for current mode!!!");
1942
1943     ttb &= 0xffffc000;
1944
1945     *result = ttb;
1946
1947     return ERROR_OK;
1948 }
1949
1950 static int cortex_a8_disable_mmu_caches(struct target *target, int mmu,
1951                 int d_u_cache, int i_cache)
1952 {
1953     struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
1954     struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
1955     uint32_t cp15_control;
1956     int retval;
1957
1958     /* read cp15 control register */
1959     retval = armv7a->armv4_5_common.mrc(target, 15,
1960                     0, 0,   /* op1, op2 */
1961                     1, 0,   /* CRn, CRm */
1962                     &cp15_control);
1963     if (retval != ERROR_OK)
1964         return retval;
1965
1966
1967     if (mmu)
1968             cp15_control &= ~0x1U;
1969
1970     if (d_u_cache)
1971             cp15_control &= ~0x4U;
1972
1973     if (i_cache)
1974             cp15_control &= ~0x1000U;
1975
1976     retval = armv7a->armv4_5_common.mcr(target, 15,
1977                     0, 0,   /* op1, op2 */
1978                     1, 0,   /* CRn, CRm */
1979                     cp15_control);
1980         return retval;
1981 }
1982
1983 static int cortex_a8_enable_mmu_caches(struct target *target, int mmu,
1984                 int d_u_cache, int i_cache)
1985 {
1986     struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
1987     struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
1988     uint32_t cp15_control;
1989     int retval;
1990
1991     /* read cp15 control register */
1992     retval = armv7a->armv4_5_common.mrc(target, 15,
1993                     0, 0,   /* op1, op2 */
1994                     1, 0,   /* CRn, CRm */
1995                     &cp15_control);
1996     if (retval != ERROR_OK)
1997         return retval;
1998
1999     if (mmu)
2000             cp15_control |= 0x1U;
2001
2002     if (d_u_cache)
2003             cp15_control |= 0x4U;
2004
2005     if (i_cache)
2006             cp15_control |= 0x1000U;
2007
2008     retval = armv7a->armv4_5_common.mcr(target, 15,
2009                     0, 0,   /* op1, op2 */
2010                     1, 0,   /* CRn, CRm */
2011                     cp15_control);
2012         return retval;
2013 }
2014
2015
2016 static int cortex_a8_mmu(struct target *target, int *enabled)
2017 {
2018         if (target->state != TARGET_HALTED) {
2019                 LOG_ERROR("%s: target not halted", __func__);
2020                 return ERROR_TARGET_INVALID;
2021         }
2022
2023         *enabled = target_to_cortex_a8(target)->armv7a_common.armv4_5_mmu.mmu_enabled;
2024         return ERROR_OK;
2025 }
2026
2027 static int cortex_a8_virt2phys(struct target *target,
2028                 uint32_t virt, uint32_t *phys)
2029 {
2030         uint32_t cb;
2031         struct cortex_a8_common *cortex_a8 = target_to_cortex_a8(target);
2032         // struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
2033         struct armv7a_common *armv7a = target_to_armv7a(target);
2034
2035     /* We assume that virtual address is separated
2036        between user and kernel in Linux style:
2037        0x00000000-0xbfffffff - User space
2038        0xc0000000-0xffffffff - Kernel space */
2039     if( virt < 0xc0000000 ) /* Linux user space */
2040         cortex_a8->current_address_mode = ARM_MODE_USR;
2041     else /* Linux kernel */
2042         cortex_a8->current_address_mode = ARM_MODE_SVC;
2043         uint32_t ret;
2044         int retval = armv4_5_mmu_translate_va(target,
2045                         &armv7a->armv4_5_mmu, virt, &cb, &ret);
2046         if (retval != ERROR_OK)
2047                 return retval;
2048     /* Reset the flag. We don't want someone else to use it by error */
2049     cortex_a8->current_address_mode = ARM_MODE_ANY;
2050
2051         *phys = ret;
2052         return ERROR_OK;
2053 }
2054
2055 COMMAND_HANDLER(cortex_a8_handle_cache_info_command)
2056 {
2057         struct target *target = get_current_target(CMD_CTX);
2058         struct armv7a_common *armv7a = target_to_armv7a(target);
2059
2060         return armv4_5_handle_cache_info_command(CMD_CTX,
2061                         &armv7a->armv4_5_mmu.armv4_5_cache);
2062 }
2063
2064
2065 COMMAND_HANDLER(cortex_a8_handle_dbginit_command)
2066 {
2067         struct target *target = get_current_target(CMD_CTX);
2068         if (!target_was_examined(target))
2069         {
2070                 LOG_ERROR("target not examined yet");
2071                 return ERROR_FAIL;
2072         }
2073
2074         return cortex_a8_init_debug_access(target);
2075 }
2076
2077 static const struct command_registration cortex_a8_exec_command_handlers[] = {
2078         {
2079                 .name = "cache_info",
2080                 .handler = cortex_a8_handle_cache_info_command,
2081                 .mode = COMMAND_EXEC,
2082                 .help = "display information about target caches",
2083         },
2084         {
2085                 .name = "dbginit",
2086                 .handler = cortex_a8_handle_dbginit_command,
2087                 .mode = COMMAND_EXEC,
2088                 .help = "Initialize core debug",
2089         },
2090         COMMAND_REGISTRATION_DONE
2091 };
2092 static const struct command_registration cortex_a8_command_handlers[] = {
2093         {
2094                 .chain = arm_command_handlers,
2095         },
2096         {
2097                 .chain = armv7a_command_handlers,
2098         },
2099         {
2100                 .name = "cortex_a8",
2101                 .mode = COMMAND_ANY,
2102                 .help = "Cortex-A8 command group",
2103                 .chain = cortex_a8_exec_command_handlers,
2104         },
2105         COMMAND_REGISTRATION_DONE
2106 };
2107
2108 struct target_type cortexa8_target = {
2109         .name = "cortex_a8",
2110
2111         .poll = cortex_a8_poll,
2112         .arch_state = armv7a_arch_state,
2113
2114         .target_request_data = NULL,
2115
2116         .halt = cortex_a8_halt,
2117         .resume = cortex_a8_resume,
2118         .step = cortex_a8_step,
2119
2120         .assert_reset = cortex_a8_assert_reset,
2121         .deassert_reset = cortex_a8_deassert_reset,
2122         .soft_reset_halt = NULL,
2123
2124         /* REVISIT allow exporting VFP3 registers ... */
2125         .get_gdb_reg_list = arm_get_gdb_reg_list,
2126
2127         .read_memory = cortex_a8_read_memory,
2128         .write_memory = cortex_a8_write_memory,
2129         .bulk_write_memory = cortex_a8_bulk_write_memory,
2130
2131         .checksum_memory = arm_checksum_memory,
2132         .blank_check_memory = arm_blank_check_memory,
2133
2134         .run_algorithm = armv4_5_run_algorithm,
2135
2136         .add_breakpoint = cortex_a8_add_breakpoint,
2137         .remove_breakpoint = cortex_a8_remove_breakpoint,
2138         .add_watchpoint = NULL,
2139         .remove_watchpoint = NULL,
2140
2141         .commands = cortex_a8_command_handlers,
2142         .target_create = cortex_a8_target_create,
2143         .init_target = cortex_a8_init_target,
2144         .examine = cortex_a8_examine,
2145
2146         .read_phys_memory = cortex_a8_read_phys_memory,
2147         .write_phys_memory = cortex_a8_write_phys_memory,
2148         .mmu = cortex_a8_mmu,
2149         .virt2phys = cortex_a8_virt2phys,
2150
2151 };