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   1 /***************************************************************************
   2  *                                                                         *
   3  *   Copyright (C) 2018 by Bohdan Tymkiv                                   *
   4  *   bohdan.tymkiv@cypress.com bohdan200@gmail.com                         *
   5  *                                                                         *
   6  *   This program is free software; you can redistribute it and/or modify  *
   7  *   it under the terms of the GNU General Public License as published by  *
   8  *   the Free Software Foundation; either version 2 of the License, or     *
   9  *   (at your option) any later version.                                   *
  10  *                                                                         *
  11  *   This program is distributed in the hope that it will be useful,       *
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  14  *   GNU General Public License for more details.                          *
  15  *                                                                         *
  16  *   You should have received a copy of the GNU General Public License     *
  17  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  18  ***************************************************************************/
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include <time.h>
  25
  26 #include "imp.h"
  27 #include "target/target.h"
  28 #include "target/cortex_m.h"
  29 #include "target/breakpoints.h"
  30 #include "target/target_type.h"
  31 #include "time_support.h"
  32 #include "target/algorithm.h"
  33
  34 /**************************************************************************************************
  35  * PSoC6 device definitions
  36  *************************************************************************************************/
  37 #define MFLASH_SECTOR_SIZE              (256u * 1024u)
  38 #define WFLASH_SECTOR_SIZE              (32u * 1024u)
  39
  40 #define MEM_BASE_MFLASH                 0x10000000u
  41 #define MEM_BASE_WFLASH                 0x14000000u
  42 #define MEM_WFLASH_SIZE                 32768u
  43 #define MEM_BASE_SFLASH                 0x16000000u
  44 #define RAM_STACK_WA_SIZE               2048u
  45 #define PSOC6_SPCIF_GEOMETRY            0x4025F00Cu
  46
  47 #define PROTECTION_UNKNOWN              0x00u
  48 #define PROTECTION_VIRGIN               0x01u
  49 #define PROTECTION_NORMAL               0x02u
  50 #define PROTECTION_SECURE               0x03u
  51 #define PROTECTION_DEAD                 0x04u
  52
  53 #define MEM_BASE_IPC                    0x40230000u
  54 #define IPC_STRUCT_SIZE                 0x20u
  55 #define MEM_IPC(n)                      (MEM_BASE_IPC + (n) * IPC_STRUCT_SIZE)
  56 #define MEM_IPC_ACQUIRE(n)              (MEM_IPC(n) + 0x00u)
  57 #define MEM_IPC_NOTIFY(n)               (MEM_IPC(n) + 0x08u)
  58 #define MEM_IPC_DATA(n)                 (MEM_IPC(n) + 0x0Cu)
  59 #define MEM_IPC_LOCK_STATUS(n)          (MEM_IPC(n) + 0x10u)
  60
  61 #define MEM_BASE_IPC_INTR               0x40231000u
  62 #define IPC_INTR_STRUCT_SIZE            0x20u
  63 #define MEM_IPC_INTR(n)                 (MEM_BASE_IPC_INTR + (n) * IPC_INTR_STRUCT_SIZE)
  64 #define MEM_IPC_INTR_MASK(n)            (MEM_IPC_INTR(n) + 0x08u)
  65 #define IPC_ACQUIRE_SUCCESS_MSK         0x80000000u
  66 #define IPC_LOCK_ACQUIRED_MSK           0x80000000u
  67
  68 #define IPC_ID                          2u
  69 #define IPC_INTR_ID                     0u
  70 #define IPC_TIMEOUT_MS                  1000
  71
  72 #define SROMAPI_SIID_REQ                    0x00000001u
  73 #define SROMAPI_SIID_REQ_FAMILY_REVISION    (SROMAPI_SIID_REQ | 0x000u)
  74 #define SROMAPI_SIID_REQ_SIID_PROTECTION    (SROMAPI_SIID_REQ | 0x100u)
  75 #define SROMAPI_WRITEROW_REQ                0x05000100u
  76 #define SROMAPI_PROGRAMROW_REQ              0x06000100u
  77 #define SROMAPI_ERASESECTOR_REQ             0x14000100u
  78 #define SROMAPI_ERASEALL_REQ                0x0A000100u
  79 #define SROMAPI_ERASEROW_REQ                0x1C000100u
  80
  81 #define SROMAPI_STATUS_MSK                  0xF0000000u
  82 #define SROMAPI_STAT_SUCCESS                0xA0000000u
  83 #define SROMAPI_DATA_LOCATION_MSK           0x00000001u
  84 #define SROMAPI_CALL_TIMEOUT_MS             1500
  85
  86 struct psoc6_target_info {
  87         uint32_t silicon_id;
  88         uint8_t protection;
  89         uint32_t main_flash_sz;
  90         uint32_t row_sz;
  91         bool is_probed;
  92 };
  93
  94 struct timeout {
  95         int64_t start_time;
  96         long timeout_ms;
  97 };
  98
  99 struct row_region {
 100         uint32_t addr;
 101         size_t size;
 102 };
 103
 104 static const struct row_region safe_sflash_regions[] = {
 105         {0x16000800, 0x800},    /* SFLASH: User Data */
 106         {0x16001A00, 0x200},    /* SFLASH: NAR */
 107         {0x16005A00, 0xC00},    /* SFLASH: Public Key */
 108         {0x16007C00, 0x400},    /* SFLASH: TOC2 */
 109 };
 110
 111 #define SFLASH_NUM_REGIONS ARRAY_SIZE(safe_sflash_regions)
 112
 113 static struct working_area *g_stack_area;
 114 static struct armv7m_algorithm g_armv7m_info;
 115
 116 /** ***********************************************************************************************
 117  * @brief Initializes `struct timeout` structure with given timeout value
 118  * @param to pointer to `struct timeout` structure
 119  * @param timeout_ms timeout, in milliseconds
 120  *************************************************************************************************/
 121 static void timeout_init(struct timeout *to, long timeout_ms)
 122 {
 123         to->start_time = timeval_ms();
 124         to->timeout_ms = timeout_ms;
 125 }
 126
 127 /** ***********************************************************************************************
 128  * @brief Returns true if given `struct timeout` structure has expired
 129  * @param to pointer to `struct timeout` structure
 130  * @return true if timeout expired
 131  *************************************************************************************************/
 132 static bool timeout_expired(struct timeout *to)
 133 {
 134         return (timeval_ms() - to->start_time) > to->timeout_ms;
 135 }
 136
 137 /** ***********************************************************************************************
 138  * @brief Starts pseudo flash algorithm and leaves it running. Function allocates working area for
 139  * algorithm code and CPU stack, adjusts stack pointer, uploads and starts the algorithm.
 140  * Algorithm (a basic infinite loop) runs asynchronously while driver performs Flash operations.
 141  *
 142  * @param target target for the algorithm
 143  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 144  *************************************************************************************************/
 145 static int sromalgo_prepare(struct target *target)
 146 {
 147         int hr;
 148
 149         /* Initialize Vector Table Offset register (in case FW modified it) */
 150         hr = target_write_u32(target, 0xE000ED08, 0x00000000);
 151         if (hr != ERROR_OK)
 152                 return hr;
 153
 154         /* Restore THUMB bit in xPSR register */
 155         const struct armv7m_common *cm = target_to_armv7m(target);
 156         hr = cm->store_core_reg_u32(target, ARMV7M_xPSR, 0x01000000);
 157         if (hr != ERROR_OK)
 158                 return hr;
 159
 160         /* Allocate Working Area for Stack and Flash algorithm */
 161         hr = target_alloc_working_area(target, RAM_STACK_WA_SIZE, &g_stack_area);
 162         if (hr != ERROR_OK)
 163                 return hr;
 164
 165         g_armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
 166         g_armv7m_info.core_mode = ARM_MODE_THREAD;
 167
 168         struct reg_param reg_params;
 169         init_reg_param(&reg_params, "sp", 32, PARAM_OUT);
 170         buf_set_u32(reg_params.value, 0, 32, g_stack_area->address + g_stack_area->size);
 171
 172         /* Write basic infinite loop algorithm to target RAM */
 173         hr = target_write_u32(target, g_stack_area->address, 0xFEE7FEE7);
 174         if (hr != ERROR_OK)
 175                 goto destroy_rp_free_wa;
 176
 177         hr = target_start_algorithm(target, 0, NULL, 1, &reg_params, g_stack_area->address,
 178                         0, &g_armv7m_info);
 179         if (hr != ERROR_OK)
 180                 goto destroy_rp_free_wa;
 181
 182         destroy_reg_param(&reg_params);
 183
 184         return hr;
 185
 186 destroy_rp_free_wa:
 187         /* Something went wrong, do some cleanup */
 188         destroy_reg_param(&reg_params);
 189
 190         if (g_stack_area) {
 191                 target_free_working_area(target, g_stack_area);
 192                 g_stack_area = NULL;
 193         }
 194
 195         return hr;
 196 }
 197
 198 /** ***********************************************************************************************
 199  * @brief Stops running flash algorithm and releases associated resources.
 200  * This function is also used for cleanup in case of errors so g_stack_area may be NULL.
 201  * These cases have to be handled gracefully.
 202  *
 203  * @param target current target
 204  *************************************************************************************************/
 205 static void sromalgo_release(struct target *target)
 206 {
 207         int hr = ERROR_OK;
 208
 209         if (g_stack_area) {
 210                 /* Stop flash algorithm if it is running */
 211                 if (target->running_alg) {
 212                         hr = target_halt(target);
 213                         if (hr != ERROR_OK)
 214                                 goto exit_free_wa;
 215
 216                         hr = target_wait_algorithm(target, 0, NULL, 0, NULL, 0,
 217                                         IPC_TIMEOUT_MS, &g_armv7m_info);
 218                         if (hr != ERROR_OK)
 219                                 goto exit_free_wa;
 220                 }
 221
 222 exit_free_wa:
 223                 /* Free Stack/Flash algorithm working area */
 224                 target_free_working_area(target, g_stack_area);
 225                 g_stack_area = NULL;
 226         }
 227 }
 228
 229 /** ***********************************************************************************************
 230  * @brief Waits for expected IPC lock status. PSoC6 uses IPC structures for inter-core
 231  * communication. Same IPCs are used to invoke SROM API. IPC structure must be locked prior to
 232  * invoking any SROM API. This ensures nothing else in the system will use same IPC thus corrupting
 233  * our data. Locking is performed by ipc_acquire(), this function ensures that IPC is actually
 234  * in expected state
 235  *
 236  * @param target current target
 237  * @param ipc_id IPC index to poll. IPC #2 is dedicated for DAP access
 238  * @param lock_expected expected lock status
 239  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 240  *************************************************************************************************/
 241 static int ipc_poll_lock_stat(struct target *target, uint32_t ipc_id, bool lock_expected)
 242 {
 243         int hr;
 244         uint32_t reg_val;
 245
 246         struct timeout to;
 247         timeout_init(&to, IPC_TIMEOUT_MS);
 248
 249         while (!timeout_expired(&to)) {
 250                 /* Process any server requests */
 251                 keep_alive();
 252
 253                 /* Read IPC Lock status */
 254                 hr = target_read_u32(target, MEM_IPC_LOCK_STATUS(ipc_id), &reg_val);
 255                 if (hr != ERROR_OK) {
 256                         LOG_ERROR("Unable to read IPC Lock Status register");
 257                         return hr;
 258                 }
 259
 260                 bool is_locked = (reg_val & IPC_LOCK_ACQUIRED_MSK) != 0;
 261
 262                 if (lock_expected == is_locked)
 263                         return ERROR_OK;
 264         }
 265
 266         if (target->coreid) {
 267                 LOG_WARNING("SROM API calls via CM4 target are supported on single-core PSoC6 devices only. "
 268                         "Please perform all Flash-related operations via CM0+ target on dual-core devices.");
 269         }
 270
 271         LOG_ERROR("Timeout polling IPC Lock Status");
 272         return ERROR_TARGET_TIMEOUT;
 273 }
 274
 275 /** ***********************************************************************************************
 276  * @brief Acquires IPC structure. PSoC6 uses IPC structures for inter-core communication.
 277  * Same IPCs are used to invoke SROM API. IPC structure must be locked prior to invoking any SROM API.
 278  * This ensures nothing else in the system will use same IPC thus corrupting our data.
 279  * This function locks the IPC.
 280  *
 281  * @param target current target
 282  * @param ipc_id ipc_id IPC index to acquire. IPC #2 is dedicated for DAP access
 283  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 284  *************************************************************************************************/
 285 static int ipc_acquire(struct target *target, char ipc_id)
 286 {
 287         int hr = ERROR_OK;
 288         bool is_acquired = false;
 289         uint32_t reg_val;
 290
 291         struct timeout to;
 292         timeout_init(&to, IPC_TIMEOUT_MS);
 293
 294         while (!timeout_expired(&to)) {
 295                 keep_alive();
 296
 297                 hr = target_write_u32(target, MEM_IPC_ACQUIRE(ipc_id), IPC_ACQUIRE_SUCCESS_MSK);
 298                 if (hr != ERROR_OK) {
 299                         LOG_ERROR("Unable to write to IPC Acquire register");
 300                         return hr;
 301                 }
 302
 303                 /* Check if data is written on first step */
 304                 hr = target_read_u32(target, MEM_IPC_ACQUIRE(ipc_id), &reg_val);
 305                 if (hr != ERROR_OK) {
 306                         LOG_ERROR("Unable to read IPC Acquire register");
 307                         return hr;
 308                 }
 309
 310                 is_acquired = (reg_val & IPC_ACQUIRE_SUCCESS_MSK) != 0;
 311                 if (is_acquired) {
 312                         /* If IPC structure is acquired, the lock status should be set */
 313                         hr = ipc_poll_lock_stat(target, ipc_id, true);
 314                         break;
 315                 }
 316         }
 317
 318         if (!is_acquired)
 319                 LOG_ERROR("Timeout acquiring IPC structure");
 320
 321         return hr;
 322 }
 323
 324 /** ***********************************************************************************************
 325  * @brief Invokes SROM API functions which are responsible for Flash operations
 326  *
 327  * @param target current target
 328  * @param req_and_params request id of the function to invoke
 329  * @param working_area address of memory buffer in target's memory space for SROM API parameters
 330  * @param data_out pointer to variable which will be populated with execution status
 331  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 332  *************************************************************************************************/
 333 static int call_sromapi(struct target *target,
 334         uint32_t req_and_params,
 335         uint32_t working_area,
 336         uint32_t *data_out)
 337 {
 338         int hr;
 339
 340         bool is_data_in_ram = (req_and_params & SROMAPI_DATA_LOCATION_MSK) == 0;
 341
 342         hr = ipc_acquire(target, IPC_ID);
 343         if (hr != ERROR_OK)
 344                 return hr;
 345
 346         if (is_data_in_ram)
 347                 hr = target_write_u32(target, MEM_IPC_DATA(IPC_ID), working_area);
 348         else
 349                 hr = target_write_u32(target, MEM_IPC_DATA(IPC_ID), req_and_params);
 350
 351         if (hr != ERROR_OK)
 352                 return hr;
 353
 354         /* Enable notification interrupt of IPC_INTR_STRUCT0(CM0+) for IPC_STRUCT2 */
 355         hr = target_write_u32(target, MEM_IPC_INTR_MASK(IPC_INTR_ID), 1u << (16 + IPC_ID));
 356         if (hr != ERROR_OK)
 357                 return hr;
 358
 359         hr = target_write_u32(target, MEM_IPC_NOTIFY(IPC_ID), 1);
 360         if (hr != ERROR_OK)
 361                 return hr;
 362
 363         /* Poll lock status */
 364         hr = ipc_poll_lock_stat(target, IPC_ID, false);
 365         if (hr != ERROR_OK)
 366                 return hr;
 367
 368         /* Poll Data byte */
 369         if (is_data_in_ram)
 370                 hr = target_read_u32(target, working_area, data_out);
 371         else
 372                 hr = target_read_u32(target, MEM_IPC_DATA(IPC_ID), data_out);
 373
 374         if (hr != ERROR_OK) {
 375                 LOG_ERROR("Error reading SROM API Status location");
 376                 return hr;
 377         }
 378
 379         bool is_success = (*data_out & SROMAPI_STATUS_MSK) == SROMAPI_STAT_SUCCESS;
 380         if (!is_success) {
 381                 LOG_ERROR("SROM API execution failed. Status: 0x%08X", (uint32_t)*data_out);
 382                 return ERROR_TARGET_FAILURE;
 383         }
 384
 385         return ERROR_OK;
 386 }
 387
 388 /** ***********************************************************************************************
 389  * @brief Retrieves SiliconID and Protection status of the target device
 390  * @param target current target
 391  * @param si_id pointer to variable, will be populated with SiliconID
 392  * @param protection pointer to variable, will be populated with protection status
 393  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 394  *************************************************************************************************/
 395 static int get_silicon_id(struct target *target, uint32_t *si_id, uint8_t *protection)
 396 {
 397         int hr;
 398         uint32_t family_rev, siid_prot;
 399
 400         hr = sromalgo_prepare(target);
 401         if (hr != ERROR_OK)
 402                 goto exit;
 403
 404         /* Read FamilyID and Revision */
 405         hr = call_sromapi(target, SROMAPI_SIID_REQ_FAMILY_REVISION, 0, &family_rev);
 406         if (hr != ERROR_OK)
 407                 goto exit;
 408
 409         /* Read SiliconID and Protection */
 410         hr = call_sromapi(target, SROMAPI_SIID_REQ_SIID_PROTECTION, 0, &siid_prot);
 411         if (hr != ERROR_OK)
 412                 goto exit;
 413
 414         *si_id  = (siid_prot & 0x0000FFFF) << 16;
 415         *si_id |= (family_rev & 0x00FF0000) >> 8;
 416         *si_id |= (family_rev & 0x000000FF) >> 0;
 417
 418         *protection = (siid_prot & 0x000F0000) >> 0x10;
 419
 420 exit:
 421         sromalgo_release(target);
 422         return ERROR_OK;
 423 }
 424
 425 /** ***********************************************************************************************
 426  * @brief Translates Protection status to openocd-friendly boolean value
 427  * @param bank current flash bank
 428  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 429  *************************************************************************************************/
 430 static int psoc6_protect_check(struct flash_bank *bank)
 431 {
 432         int is_protected;
 433
 434         struct psoc6_target_info *psoc6_info = bank->driver_priv;
 435         int hr = get_silicon_id(bank->target, &psoc6_info->silicon_id, &psoc6_info->protection);
 436         if (hr != ERROR_OK)
 437                 return hr;
 438
 439         switch (psoc6_info->protection) {
 440                 case PROTECTION_VIRGIN:
 441                 case PROTECTION_NORMAL:
 442                         is_protected = 0;
 443                         break;
 444
 445                 case PROTECTION_UNKNOWN:
 446                 case PROTECTION_SECURE:
 447                 case PROTECTION_DEAD:
 448                 default:
 449                         is_protected = 1;
 450                         break;
 451         }
 452
 453         for (unsigned int i = 0; i < bank->num_sectors; i++)
 454                 bank->sectors[i].is_protected = is_protected;
 455
 456         return ERROR_OK;
 457 }
 458
 459 /** ***********************************************************************************************
 460  * @brief Dummy function, Life Cycle transition is not currently supported
 461  * @return ERROR_OK always
 462  *************************************************************************************************/
 463 static int psoc6_protect(struct flash_bank *bank, int set, unsigned int first,
 464                 unsigned int last)
 465 {
 466         (void)bank;
 467         (void)set;
 468         (void)first;
 469         (void)last;
 470
 471         LOG_WARNING("Life Cycle transition for PSoC6 is not supported");
 472         return ERROR_OK;
 473 }
 474
 475 /** ***********************************************************************************************
 476  * @brief Translates Protection status to string
 477  * @param protection protection value
 478  * @return pointer to const string describing protection status
 479  *************************************************************************************************/
 480 static const char *protection_to_str(uint8_t protection)
 481 {
 482         switch (protection) {
 483                 case PROTECTION_VIRGIN:
 484                         return "VIRGIN";
 485                 case PROTECTION_NORMAL:
 486                         return "NORMAL";
 487                 case PROTECTION_SECURE:
 488                         return "SECURE";
 489                 case PROTECTION_DEAD:
 490                         return "DEAD";
 491                 case PROTECTION_UNKNOWN:
 492                 default:
 493                         return "UNKNOWN";
 494         }
 495 }
 496
 497 /** ***********************************************************************************************
 498  * @brief psoc6_get_info Displays human-readable information about acquired device
 499  * @param bank current flash bank
 500  * @param buf pointer to buffer for human-readable text
 501  * @param buf_size size of the buffer
 502  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 503  *************************************************************************************************/
 504 static int psoc6_get_info(struct flash_bank *bank, char *buf, int buf_size)
 505 {
 506         struct psoc6_target_info *psoc6_info = bank->driver_priv;
 507
 508         if (psoc6_info->is_probed == false)
 509                 return ERROR_FAIL;
 510
 511         int hr = get_silicon_id(bank->target, &psoc6_info->silicon_id, &psoc6_info->protection);
 512         if (hr != ERROR_OK)
 513                 return hr;
 514
 515         snprintf(buf, buf_size,
 516                 "PSoC6 Silicon ID: 0x%08X\n"
 517                 "Protection: %s\n"
 518                 "Main Flash size: %d kB\n"
 519                 "Work Flash size: 32 kB\n",
 520                 psoc6_info->silicon_id,
 521                 protection_to_str(psoc6_info->protection),
 522                 psoc6_info->main_flash_sz / 1024);
 523
 524         return ERROR_OK;
 525 }
 526
 527 /** ***********************************************************************************************
 528  * @brief Checks if given flash bank belongs to Supervisory Flash
 529  * @param bank current flash bank
 530  * @return true if flash bank belongs to Supervisory Flash
 531  *************************************************************************************************/
 532 static bool is_sflash_bank(struct flash_bank *bank)
 533 {
 534         for (size_t i = 0; i < SFLASH_NUM_REGIONS; i++) {
 535                 if (bank->base == safe_sflash_regions[i].addr)
 536                         return true;
 537         }
 538
 539         return false;
 540 }
 541
 542 /** ***********************************************************************************************
 543  * @brief Checks if given flash bank belongs to Work Flash
 544  * @param bank current flash bank
 545  * @return true if flash bank belongs to Work Flash
 546  *************************************************************************************************/
 547 static inline bool is_wflash_bank(struct flash_bank *bank)
 548 {
 549         return (bank->base == MEM_BASE_WFLASH);
 550 }
 551
 552 /** ***********************************************************************************************
 553  * @brief Checks if given flash bank belongs to Main Flash
 554  * @param bank current flash bank
 555  * @return true if flash bank belongs to Main Flash
 556  *************************************************************************************************/
 557 static inline bool is_mflash_bank(struct flash_bank *bank)
 558 {
 559         return (bank->base == MEM_BASE_MFLASH);
 560 }
 561
 562 /** ***********************************************************************************************
 563  * @brief Probes the device and populates related data structures with target flash geometry data.
 564  * This is done in non-intrusive way, no SROM API calls are involved so GDB can safely attach to a
 565  * running target. Function assumes that size of Work Flash is 32kB (true for all current part numbers)
 566  *
 567  * @param bank current flash bank
 568  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 569  *************************************************************************************************/
 570 static int psoc6_probe(struct flash_bank *bank)
 571 {
 572         struct target *target = bank->target;
 573         struct psoc6_target_info *psoc6_info = bank->driver_priv;
 574
 575         int hr = ERROR_OK;
 576
 577         /* Retrieve data from SPCIF_GEOMETRY */
 578         uint32_t geom;
 579         target_read_u32(target, PSOC6_SPCIF_GEOMETRY, &geom);
 580         uint32_t row_sz_lg2 = (geom & 0xF0) >> 4;
 581         uint32_t row_sz = (0x01 << row_sz_lg2);
 582         uint32_t row_cnt = 1 + ((geom & 0x00FFFF00) >> 8);
 583         uint32_t bank_cnt = 1 + ((geom & 0xFF000000) >> 24);
 584
 585         /* Calculate size of Main Flash*/
 586         uint32_t flash_sz_bytes = bank_cnt * row_cnt * row_sz;
 587
 588         if (bank->sectors) {
 589                 free(bank->sectors);
 590                 bank->sectors = NULL;
 591         }
 592
 593         size_t bank_size = 0;
 594
 595         if (is_mflash_bank(bank))
 596                 bank_size = flash_sz_bytes;
 597         else if (is_wflash_bank(bank))
 598                 bank_size = MEM_WFLASH_SIZE;
 599         else if (is_sflash_bank(bank)) {
 600                 for (size_t i = 0; i < SFLASH_NUM_REGIONS; i++) {
 601                         if (safe_sflash_regions[i].addr == bank->base) {
 602                                 bank_size = safe_sflash_regions[i].size;
 603                                 break;
 604                         }
 605                 }
 606         }
 607
 608         if (bank_size == 0) {
 609                 LOG_ERROR("Invalid Flash Bank base address in config file");
 610                 return ERROR_FLASH_BANK_INVALID;
 611         }
 612
 613         unsigned int num_sectors = bank_size / row_sz;
 614         bank->size = bank_size;
 615         bank->chip_width = 4;
 616         bank->bus_width = 4;
 617         bank->erased_value = 0;
 618         bank->default_padded_value = 0;
 619
 620         bank->num_sectors = num_sectors;
 621         bank->sectors = calloc(num_sectors, sizeof(struct flash_sector));
 622         for (unsigned int i = 0; i < num_sectors; i++) {
 623                 bank->sectors[i].size = row_sz;
 624                 bank->sectors[i].offset = i * row_sz;
 625                 bank->sectors[i].is_erased = -1;
 626                 bank->sectors[i].is_protected = -1;
 627         }
 628
 629         psoc6_info->is_probed = true;
 630         psoc6_info->main_flash_sz = flash_sz_bytes;
 631         psoc6_info->row_sz = row_sz;
 632
 633         return hr;
 634 }
 635
 636 /** ***********************************************************************************************
 637  * @brief Probes target device only if it hasn't been probed yet
 638  * @param bank current flash bank
 639  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 640  *************************************************************************************************/
 641 static int psoc6_auto_probe(struct flash_bank *bank)
 642 {
 643         struct psoc6_target_info *psoc6_info = bank->driver_priv;
 644         int hr;
 645
 646         if (psoc6_info->is_probed)
 647                 hr = ERROR_OK;
 648         else
 649                 hr = psoc6_probe(bank);
 650
 651         return hr;
 652 }
 653
 654 /** ***********************************************************************************************
 655  * @brief Erases single sector (256k) on target device
 656  * @param bank current flash bank
 657  * @param wa working area for SROM API parameters
 658  * @param addr starting address of the sector
 659  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 660  *************************************************************************************************/
 661 static int psoc6_erase_sector(struct flash_bank *bank, struct working_area *wa, uint32_t addr)
 662 {
 663         struct target *target = bank->target;
 664
 665         LOG_DEBUG("Erasing SECTOR @%08X", addr);
 666
 667         int hr = target_write_u32(target, wa->address, SROMAPI_ERASESECTOR_REQ);
 668         if (hr != ERROR_OK)
 669                 return hr;
 670
 671         hr = target_write_u32(target, wa->address + 0x04, addr);
 672         if (hr != ERROR_OK)
 673                 return hr;
 674
 675         uint32_t data_out;
 676         hr = call_sromapi(target, SROMAPI_ERASESECTOR_REQ, wa->address, &data_out);
 677         if (hr != ERROR_OK)
 678                 LOG_ERROR("SECTOR @%08X not erased!", addr);
 679
 680         return hr;
 681 }
 682
 683 /** ***********************************************************************************************
 684  * @brief Erases single row (512b) on target device
 685  * @param bank current flash bank
 686  * @param wa working area for SROM API parameters
 687  * @param addr starting address of the flash row
 688  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 689  *************************************************************************************************/
 690 static int psoc6_erase_row(struct flash_bank *bank, struct working_area *wa, uint32_t addr)
 691 {
 692         struct target *target = bank->target;
 693
 694         LOG_DEBUG("Erasing ROW @%08X", addr);
 695
 696         int hr = target_write_u32(target, wa->address, SROMAPI_ERASEROW_REQ);
 697         if (hr != ERROR_OK)
 698                 return hr;
 699
 700         hr = target_write_u32(target, wa->address + 0x04, addr);
 701         if (hr != ERROR_OK)
 702                 return hr;
 703
 704         uint32_t data_out;
 705         hr = call_sromapi(target, SROMAPI_ERASEROW_REQ, wa->address, &data_out);
 706         if (hr != ERROR_OK)
 707                 LOG_ERROR("ROW @%08X not erased!", addr);
 708
 709         return hr;
 710 }
 711
 712 /** ***********************************************************************************************
 713  * @brief Performs Erase operation. Function will try to use biggest erase block possible to
 714  * speedup the operation.
 715  *
 716  * @param bank current flash bank
 717  * @param first first sector to erase
 718  * @param last last sector to erase
 719  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 720  *************************************************************************************************/
 721 static int psoc6_erase(struct flash_bank *bank, unsigned int first,
 722                 unsigned int last)
 723 {
 724         struct target *target = bank->target;
 725         struct psoc6_target_info *psoc6_info = bank->driver_priv;
 726         const uint32_t sector_size = is_wflash_bank(bank) ? WFLASH_SECTOR_SIZE : MFLASH_SECTOR_SIZE;
 727
 728         int hr;
 729         struct working_area *wa;
 730
 731         if (is_sflash_bank(bank)) {
 732                 LOG_INFO("Erase operation on Supervisory Flash is not required, skipping");
 733                 return ERROR_OK;
 734         }
 735
 736         hr = sromalgo_prepare(target);
 737         if (hr != ERROR_OK)
 738                 goto exit;
 739
 740         hr = target_alloc_working_area(target, psoc6_info->row_sz + 32, &wa);
 741         if (hr != ERROR_OK)
 742                 goto exit;
 743
 744         /* Number of rows in single sector */
 745         const unsigned int rows_in_sector = sector_size / psoc6_info->row_sz;
 746
 747         while (last >= first) {
 748                 /* Erase Sector if we are on sector boundary and erase size covers whole sector */
 749                 if ((first % rows_in_sector) == 0 &&
 750                         (last - first + 1) >= rows_in_sector) {
 751                         hr = psoc6_erase_sector(bank, wa, bank->base + first * psoc6_info->row_sz);
 752                         if (hr != ERROR_OK)
 753                                 goto exit_free_wa;
 754
 755                         for (unsigned int i = first; i < first + rows_in_sector; i++)
 756                                 bank->sectors[i].is_erased = 1;
 757
 758                         first += rows_in_sector;
 759                 } else {
 760                         /* Perform Row Erase otherwise */
 761                         hr = psoc6_erase_row(bank, wa, bank->base + first * psoc6_info->row_sz);
 762                         if (hr != ERROR_OK)
 763                                 goto exit_free_wa;
 764
 765                         bank->sectors[first].is_erased = 1;
 766                         first += 1;
 767                 }
 768         }
 769
 770 exit_free_wa:
 771         target_free_working_area(target, wa);
 772 exit:
 773         sromalgo_release(target);
 774         return hr;
 775 }
 776
 777 /** ***********************************************************************************************
 778  * @brief Programs single Flash Row
 779  * @param bank current flash bank
 780  * @param addr address of the flash row
 781  * @param buffer pointer to the buffer with data
 782  * @param is_sflash true if current flash bank belongs to Supervisory Flash
 783  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 784  *************************************************************************************************/
 785 static int psoc6_program_row(struct flash_bank *bank,
 786         uint32_t addr,
 787         const uint8_t *buffer,
 788         bool is_sflash)
 789 {
 790         struct target *target = bank->target;
 791         struct psoc6_target_info *psoc6_info = bank->driver_priv;
 792         struct working_area *wa;
 793         const uint32_t sromapi_req = is_sflash ? SROMAPI_WRITEROW_REQ : SROMAPI_PROGRAMROW_REQ;
 794         uint32_t data_out;
 795         int hr = ERROR_OK;
 796
 797         LOG_DEBUG("Programming ROW @%08X", addr);
 798
 799         hr = target_alloc_working_area(target, psoc6_info->row_sz + 32, &wa);
 800         if (hr != ERROR_OK)
 801                 goto exit;
 802
 803         hr = target_write_u32(target, wa->address, sromapi_req);
 804         if (hr != ERROR_OK)
 805                 goto exit_free_wa;
 806
 807         hr = target_write_u32(target,
 808                         wa->address + 0x04,
 809                         0x106);
 810         if (hr != ERROR_OK)
 811                 goto exit_free_wa;
 812
 813         hr = target_write_u32(target, wa->address + 0x08, addr);
 814         if (hr != ERROR_OK)
 815                 goto exit_free_wa;
 816
 817         hr = target_write_u32(target, wa->address + 0x0C, wa->address + 0x10);
 818         if (hr != ERROR_OK)
 819                 goto exit_free_wa;
 820
 821         hr = target_write_buffer(target, wa->address + 0x10, psoc6_info->row_sz, buffer);
 822         if (hr != ERROR_OK)
 823                 goto exit_free_wa;
 824
 825         hr = call_sromapi(target, sromapi_req, wa->address, &data_out);
 826
 827 exit_free_wa:
 828         target_free_working_area(target, wa);
 829
 830 exit:
 831         return hr;
 832 }
 833
 834 /** ***********************************************************************************************
 835  * @brief Performs Program operation
 836  * @param bank current flash bank
 837  * @param buffer pointer to the buffer with data
 838  * @param offset starting offset in flash bank
 839  * @param count number of bytes in buffer
 840  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 841  *************************************************************************************************/
 842 static int psoc6_program(struct flash_bank *bank,
 843         const uint8_t *buffer,
 844         uint32_t offset,
 845         uint32_t count)
 846 {
 847         struct target *target = bank->target;
 848         struct psoc6_target_info *psoc6_info = bank->driver_priv;
 849         const bool is_sflash = is_sflash_bank(bank);
 850         int hr;
 851
 852         uint8_t page_buf[psoc6_info->row_sz];
 853
 854         hr = sromalgo_prepare(target);
 855         if (hr != ERROR_OK)
 856                 goto exit;
 857
 858         while (count) {
 859                 uint32_t row_offset = offset % psoc6_info->row_sz;
 860                 uint32_t aligned_addr = bank->base + offset - row_offset;
 861                 uint32_t row_bytes = MIN(psoc6_info->row_sz - row_offset, count);
 862
 863                 memset(page_buf, 0, sizeof(page_buf));
 864                 memcpy(&page_buf[row_offset], buffer, row_bytes);
 865
 866                 hr = psoc6_program_row(bank, aligned_addr, page_buf, is_sflash);
 867                 if (hr != ERROR_OK) {
 868                         LOG_ERROR("Failed to program Flash at address 0x%08X", aligned_addr);
 869                         goto exit;
 870                 }
 871
 872                 buffer += row_bytes;
 873                 offset += row_bytes;
 874                 count -= row_bytes;
 875         }
 876
 877 exit:
 878         sromalgo_release(target);
 879         return hr;
 880 }
 881
 882 /** ***********************************************************************************************
 883  * @brief Performs Mass Erase operation
 884  * @param bank flash bank index to erase
 885  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 886  *************************************************************************************************/
 887 COMMAND_HANDLER(psoc6_handle_mass_erase_command)
 888 {
 889         if (CMD_ARGC != 1)
 890                 return ERROR_COMMAND_SYNTAX_ERROR;
 891
 892         struct flash_bank *bank;
 893         int hr = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
 894         if (hr != ERROR_OK)
 895                 return hr;
 896
 897         hr = psoc6_erase(bank, 0, bank->num_sectors - 1);
 898
 899         return hr;
 900 }
 901
 902 /** ***********************************************************************************************
 903  * @brief Simulates broken Vector Catch
 904  * Function will try to determine entry point of user application. If it succeeds it will set HW
 905  * breakpoint at that address, issue SW Reset and remove the breakpoint afterwards.
 906  * In case of CM0, SYSRESETREQ is used. This allows to reset all peripherals. Boot code will
 907  * reset CM4 anyway, so using SYSRESETREQ is safe here.
 908  * In case of CM4, VECTRESET is used instead of SYSRESETREQ to not disturb CM0 core.
 909  *
 910  * @param target current target
 911  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 912  *************************************************************************************************/
 913 int handle_reset_halt(struct target *target)
 914 {
 915         int hr;
 916         uint32_t reset_addr;
 917         bool is_cm0 = (target->coreid == 0);
 918
 919         /* Halt target device */
 920         if (target->state != TARGET_HALTED) {
 921                 hr = target_halt(target);
 922                 if (hr != ERROR_OK)
 923                         return hr;
 924
 925                 target_wait_state(target, TARGET_HALTED, IPC_TIMEOUT_MS);
 926                 if (hr != ERROR_OK)
 927                         return hr;
 928         }
 929
 930         /* Read Vector Offset register */
 931         uint32_t vt_base;
 932         const uint32_t vt_offset_reg = is_cm0 ? 0x402102B0 : 0x402102C0;
 933         hr = target_read_u32(target, vt_offset_reg, &vt_base);
 934         if (hr != ERROR_OK)
 935                 return ERROR_OK;
 936
 937         /* Invalid value means flash is empty */
 938         vt_base &= 0xFFFFFF00;
 939         if ((vt_base == 0) || (vt_base == 0xFFFFFF00))
 940                 return ERROR_OK;
 941
 942         /* Read Reset Vector value*/
 943         hr = target_read_u32(target, vt_base + 4, &reset_addr);
 944         if (hr != ERROR_OK)
 945                 return hr;
 946
 947         /* Invalid value means flash is empty */
 948         if ((reset_addr == 0) || (reset_addr == 0xFFFFFF00))
 949                 return ERROR_OK;
 950
 951
 952         /* Set breakpoint at User Application entry point */
 953         hr = breakpoint_add(target, reset_addr, 2, BKPT_HARD);
 954         if (hr != ERROR_OK)
 955                 return hr;
 956
 957         const struct armv7m_common *cm = target_to_armv7m(target);
 958
 959         /* PSoC6 reboots immediately after issuing SYSRESETREQ / VECTRESET
 960          * this disables SWD/JTAG pins momentarily and may break communication
 961          * Ignoring return value of mem_ap_write_atomic_u32 seems to be ok here */
 962         if (is_cm0) {
 963                 /* Reset the CM0 by asserting SYSRESETREQ. This will also reset CM4 */
 964                 LOG_INFO("psoc6.cm0: bkpt @0x%08X, issuing SYSRESETREQ", reset_addr);
 965                 mem_ap_write_atomic_u32(cm->debug_ap, NVIC_AIRCR,
 966                         AIRCR_VECTKEY | AIRCR_SYSRESETREQ);
 967         } else {
 968                 LOG_INFO("psoc6.cm4: bkpt @0x%08X, issuing VECTRESET", reset_addr);
 969                 mem_ap_write_atomic_u32(cm->debug_ap, NVIC_AIRCR,
 970                         AIRCR_VECTKEY | AIRCR_VECTRESET);
 971         }
 972
 973         /* Wait 100ms for bootcode and reinitialize DAP */
 974         usleep(100000);
 975         dap_dp_init(cm->debug_ap->dap);
 976
 977         target_wait_state(target, TARGET_HALTED, IPC_TIMEOUT_MS);
 978
 979         /* Remove the break point */
 980         breakpoint_remove(target, reset_addr);
 981
 982         return ERROR_OK;
 983 }
 984
 985 /** ***********************************************************************************************
 986  * @brief Simulates broken Vector Catch
 987  * Function will try to determine entry point of user application. If it succeeds it will set HW
 988  * breakpoint at that address, issue SW Reset and remove the breakpoint afterwards.
 989  * In case of CM0, SYSRESETREQ is used. This allows to reset all peripherals. Boot code will
 990  * reset CM4 anyway, so using SYSRESETREQ is safe here.
 991  * In case of CM4, VECTRESET is used instead of SYSRESETREQ to not disturb CM0 core.
 992  *
 993  * @return ERROR_OK in case of success, ERROR_XXX code otherwise
 994  *************************************************************************************************/
 995 COMMAND_HANDLER(psoc6_handle_reset_halt)
 996 {
 997         if (CMD_ARGC)
 998                 return ERROR_COMMAND_SYNTAX_ERROR;
 999
1000         struct target *target = get_current_target(CMD_CTX);
1001         return handle_reset_halt(target);
1002 }
1003
1004 FLASH_BANK_COMMAND_HANDLER(psoc6_flash_bank_command)
1005 {
1006         struct psoc6_target_info *psoc6_info;
1007         int hr = ERROR_OK;
1008
1009         if (CMD_ARGC < 6)
1010                 hr = ERROR_COMMAND_SYNTAX_ERROR;
1011         else {
1012                 psoc6_info = calloc(1, sizeof(struct psoc6_target_info));
1013                 psoc6_info->is_probed = false;
1014                 bank->driver_priv = psoc6_info;
1015         }
1016         return hr;
1017 }
1018
1019 static const struct command_registration psoc6_exec_command_handlers[] = {
1020         {
1021                 .name = "mass_erase",
1022                 .handler = psoc6_handle_mass_erase_command,
1023                 .mode = COMMAND_EXEC,
1024                 .usage = "bank",
1025                 .help = "Erases entire Main Flash",
1026         },
1027         {
1028                 .name = "reset_halt",
1029                 .handler = psoc6_handle_reset_halt,
1030                 .mode = COMMAND_EXEC,
1031                 .usage = NULL,
1032                 .help = "Tries to simulate broken Vector Catch",
1033         },
1034         COMMAND_REGISTRATION_DONE
1035 };
1036
1037 static const struct command_registration psoc6_command_handlers[] = {
1038         {
1039                 .name = "psoc6",
1040                 .mode = COMMAND_ANY,
1041                 .help = "PSoC 6 flash command group",
1042                 .usage = "",
1043                 .chain = psoc6_exec_command_handlers,
1044         },
1045         COMMAND_REGISTRATION_DONE
1046 };
1047
1048 const struct flash_driver psoc6_flash = {
1049         .name = "psoc6",
1050         .commands = psoc6_command_handlers,
1051         .flash_bank_command = psoc6_flash_bank_command,
1052         .erase = psoc6_erase,
1053         .protect = psoc6_protect,
1054         .write = psoc6_program,
1055         .read = default_flash_read,
1056         .probe = psoc6_probe,
1057         .auto_probe = psoc6_auto_probe,
1058         .erase_check = default_flash_blank_check,
1059         .protect_check = psoc6_protect_check,
1060         .info = psoc6_get_info,
1061         .free_driver_priv = default_flash_free_driver_priv,
1062 };