1 /* 2 * Copyright (c) 2015-2024, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 #include <errno.h> 9 #include <string.h> 10 11 #include <arch_helpers.h> 12 #include <common/bl_common.h> 13 #include <common/debug.h> 14 #include <common/desc_image_load.h> 15 #include <drivers/generic_delay_timer.h> 16 #include <drivers/mmc.h> 17 #include <drivers/st/bsec.h> 18 #include <drivers/st/regulator_fixed.h> 19 #include <drivers/st/stm32_iwdg.h> 20 #include <drivers/st/stm32_rng.h> 21 #include <drivers/st/stm32_uart.h> 22 #include <drivers/st/stm32mp1_clk.h> 23 #include <drivers/st/stm32mp1_pwr.h> 24 #include <drivers/st/stm32mp1_ram.h> 25 #include <drivers/st/stm32mp_pmic.h> 26 #include <lib/fconf/fconf.h> 27 #include <lib/fconf/fconf_dyn_cfg_getter.h> 28 #include <lib/mmio.h> 29 #include <lib/optee_utils.h> 30 #include <lib/xlat_tables/xlat_tables_v2.h> 31 #include <plat/common/platform.h> 32 33 #include <platform_def.h> 34 #include <stm32mp_common.h> 35 #include <stm32mp1_dbgmcu.h> 36 37 #if DEBUG 38 static const char debug_msg[] = { 39 "***************************************************\n" 40 "** DEBUG ACCESS PORT IS OPEN! **\n" 41 "** This boot image is only for debugging purpose **\n" 42 "** and is unsafe for production use. **\n" 43 "** **\n" 44 "** If you see this message and you are not **\n" 45 "** debugging report this immediately to your **\n" 46 "** vendor! **\n" 47 "***************************************************\n" 48 }; 49 #endif 50 51 static void print_reset_reason(void) 52 { 53 uint32_t rstsr = mmio_read_32(stm32mp_rcc_base() + RCC_MP_RSTSCLRR); 54 55 if (rstsr == 0U) { 56 WARN("Reset reason unknown\n"); 57 return; 58 } 59 60 INFO("Reset reason (0x%x):\n", rstsr); 61 62 if ((rstsr & RCC_MP_RSTSCLRR_PADRSTF) == 0U) { 63 if ((rstsr & RCC_MP_RSTSCLRR_STDBYRSTF) != 0U) { 64 INFO("System exits from STANDBY\n"); 65 return; 66 } 67 68 if ((rstsr & RCC_MP_RSTSCLRR_CSTDBYRSTF) != 0U) { 69 INFO("MPU exits from CSTANDBY\n"); 70 return; 71 } 72 } 73 74 if ((rstsr & RCC_MP_RSTSCLRR_PORRSTF) != 0U) { 75 INFO(" Power-on Reset (rst_por)\n"); 76 return; 77 } 78 79 if ((rstsr & RCC_MP_RSTSCLRR_BORRSTF) != 0U) { 80 INFO(" Brownout Reset (rst_bor)\n"); 81 return; 82 } 83 84 #if STM32MP15 85 if ((rstsr & RCC_MP_RSTSCLRR_MCSYSRSTF) != 0U) { 86 if ((rstsr & RCC_MP_RSTSCLRR_PADRSTF) != 0U) { 87 INFO(" System reset generated by MCU (MCSYSRST)\n"); 88 } else { 89 INFO(" Local reset generated by MCU (MCSYSRST)\n"); 90 } 91 return; 92 } 93 #endif 94 95 if ((rstsr & RCC_MP_RSTSCLRR_MPSYSRSTF) != 0U) { 96 INFO(" System reset generated by MPU (MPSYSRST)\n"); 97 return; 98 } 99 100 if ((rstsr & RCC_MP_RSTSCLRR_HCSSRSTF) != 0U) { 101 INFO(" Reset due to a clock failure on HSE\n"); 102 return; 103 } 104 105 if ((rstsr & RCC_MP_RSTSCLRR_IWDG1RSTF) != 0U) { 106 INFO(" IWDG1 Reset (rst_iwdg1)\n"); 107 return; 108 } 109 110 if ((rstsr & RCC_MP_RSTSCLRR_IWDG2RSTF) != 0U) { 111 INFO(" IWDG2 Reset (rst_iwdg2)\n"); 112 return; 113 } 114 115 if ((rstsr & RCC_MP_RSTSCLRR_MPUP0RSTF) != 0U) { 116 INFO(" MPU Processor 0 Reset\n"); 117 return; 118 } 119 120 #if STM32MP15 121 if ((rstsr & RCC_MP_RSTSCLRR_MPUP1RSTF) != 0U) { 122 INFO(" MPU Processor 1 Reset\n"); 123 return; 124 } 125 #endif 126 127 if ((rstsr & RCC_MP_RSTSCLRR_PADRSTF) != 0U) { 128 INFO(" Pad Reset from NRST\n"); 129 return; 130 } 131 132 if ((rstsr & RCC_MP_RSTSCLRR_VCORERSTF) != 0U) { 133 INFO(" Reset due to a failure of VDD_CORE\n"); 134 return; 135 } 136 137 ERROR(" Unidentified reset reason\n"); 138 } 139 140 void bl2_el3_early_platform_setup(u_register_t arg0, 141 u_register_t arg1 __unused, 142 u_register_t arg2 __unused, 143 u_register_t arg3 __unused) 144 { 145 stm32mp_setup_early_console(); 146 147 stm32mp_save_boot_ctx_address(arg0); 148 } 149 150 void bl2_platform_setup(void) 151 { 152 int ret; 153 154 ret = stm32mp1_ddr_probe(); 155 if (ret < 0) { 156 ERROR("Invalid DDR init: error %d\n", ret); 157 panic(); 158 } 159 160 /* Map DDR for binary load, now with cacheable attribute */ 161 ret = mmap_add_dynamic_region(STM32MP_DDR_BASE, STM32MP_DDR_BASE, 162 STM32MP_DDR_MAX_SIZE, MT_MEMORY | MT_RW | MT_SECURE); 163 if (ret < 0) { 164 ERROR("DDR mapping: error %d\n", ret); 165 panic(); 166 } 167 } 168 169 #if STM32MP15 170 static void update_monotonic_counter(void) 171 { 172 uint32_t version; 173 uint32_t otp; 174 175 CASSERT(STM32_TF_VERSION <= MAX_MONOTONIC_VALUE, 176 assert_stm32mp1_monotonic_counter_reach_max); 177 178 /* Check if monotonic counter needs to be incremented */ 179 if (stm32_get_otp_index(MONOTONIC_OTP, &otp, NULL) != 0) { 180 panic(); 181 } 182 183 if (stm32_get_otp_value_from_idx(otp, &version) != 0) { 184 panic(); 185 } 186 187 if ((version + 1U) < BIT(STM32_TF_VERSION)) { 188 uint32_t result; 189 190 /* Need to increment the monotonic counter. */ 191 version = BIT(STM32_TF_VERSION) - 1U; 192 193 result = bsec_program_otp(version, otp); 194 if (result != BSEC_OK) { 195 ERROR("BSEC: MONOTONIC_OTP program Error %u\n", 196 result); 197 panic(); 198 } 199 INFO("Monotonic counter has been incremented (value 0x%x)\n", 200 version); 201 } 202 } 203 #endif 204 205 void bl2_el3_plat_arch_setup(void) 206 { 207 const char *board_model; 208 boot_api_context_t *boot_context = 209 (boot_api_context_t *)stm32mp_get_boot_ctx_address(); 210 uintptr_t pwr_base; 211 uintptr_t rcc_base; 212 213 if (bsec_probe() != 0U) { 214 panic(); 215 } 216 217 mmap_add_region(BL_CODE_BASE, BL_CODE_BASE, 218 BL_CODE_END - BL_CODE_BASE, 219 MT_CODE | MT_SECURE); 220 221 /* Prevent corruption of preloaded Device Tree */ 222 mmap_add_region(DTB_BASE, DTB_BASE, 223 DTB_LIMIT - DTB_BASE, 224 MT_RO_DATA | MT_SECURE); 225 226 configure_mmu(); 227 228 if (dt_open_and_check(STM32MP_DTB_BASE) < 0) { 229 panic(); 230 } 231 232 pwr_base = stm32mp_pwr_base(); 233 rcc_base = stm32mp_rcc_base(); 234 235 /* 236 * Disable the backup domain write protection. 237 * The protection is enable at each reset by hardware 238 * and must be disabled by software. 239 */ 240 mmio_setbits_32(pwr_base + PWR_CR1, PWR_CR1_DBP); 241 242 while ((mmio_read_32(pwr_base + PWR_CR1) & PWR_CR1_DBP) == 0U) { 243 ; 244 } 245 246 /* Reset backup domain on cold boot cases */ 247 if ((mmio_read_32(rcc_base + RCC_BDCR) & RCC_BDCR_RTCSRC_MASK) == 0U) { 248 mmio_setbits_32(rcc_base + RCC_BDCR, RCC_BDCR_VSWRST); 249 250 while ((mmio_read_32(rcc_base + RCC_BDCR) & RCC_BDCR_VSWRST) == 251 0U) { 252 ; 253 } 254 255 mmio_clrbits_32(rcc_base + RCC_BDCR, RCC_BDCR_VSWRST); 256 } 257 258 /* 259 * Set minimum reset pulse duration to 31ms for discrete power 260 * supplied boards. 261 */ 262 if (dt_pmic_status() <= 0) { 263 mmio_clrsetbits_32(rcc_base + RCC_RDLSICR, 264 RCC_RDLSICR_MRD_MASK, 265 31U << RCC_RDLSICR_MRD_SHIFT); 266 } 267 268 generic_delay_timer_init(); 269 270 #if STM32MP_UART_PROGRAMMER 271 /* Disable programmer UART before changing clock tree */ 272 if (boot_context->boot_interface_selected == 273 BOOT_API_CTX_BOOT_INTERFACE_SEL_SERIAL_UART) { 274 uintptr_t uart_prog_addr = 275 get_uart_address(boot_context->boot_interface_instance); 276 277 stm32_uart_stop(uart_prog_addr); 278 } 279 #endif 280 if (stm32mp1_clk_probe() < 0) { 281 panic(); 282 } 283 284 if (stm32mp1_clk_init() < 0) { 285 panic(); 286 } 287 288 stm32_save_boot_info(boot_context); 289 290 #if STM32MP_USB_PROGRAMMER && STM32MP15 291 /* Deconfigure all UART RX pins configured by ROM code */ 292 stm32mp1_deconfigure_uart_pins(); 293 #endif 294 295 if (stm32mp_uart_console_setup() != 0) { 296 goto skip_console_init; 297 } 298 299 stm32mp_print_cpuinfo(); 300 301 board_model = dt_get_board_model(); 302 if (board_model != NULL) { 303 NOTICE("Model: %s\n", board_model); 304 } 305 306 stm32mp_print_boardinfo(); 307 308 if (boot_context->auth_status != BOOT_API_CTX_AUTH_NO) { 309 NOTICE("Bootrom authentication %s\n", 310 (boot_context->auth_status == BOOT_API_CTX_AUTH_FAILED) ? 311 "failed" : "succeeded"); 312 } 313 314 skip_console_init: 315 #if !TRUSTED_BOARD_BOOT 316 if (stm32mp_check_closed_device() == STM32MP_CHIP_SEC_CLOSED) { 317 /* Closed chip mandates authentication */ 318 ERROR("Secure chip: TRUSTED_BOARD_BOOT must be enabled\n"); 319 panic(); 320 } 321 #endif 322 323 if (fixed_regulator_register() != 0) { 324 panic(); 325 } 326 327 if (dt_pmic_status() > 0) { 328 initialize_pmic(); 329 if (pmic_voltages_init() != 0) { 330 ERROR("PMIC voltages init failed\n"); 331 panic(); 332 } 333 print_pmic_info_and_debug(); 334 } 335 336 stm32mp1_syscfg_init(); 337 338 if (stm32_iwdg_init() < 0) { 339 panic(); 340 } 341 342 stm32_iwdg_refresh(); 343 344 if (bsec_read_debug_conf() != 0U) { 345 if (stm32mp_check_closed_device() == STM32MP_CHIP_SEC_CLOSED) { 346 #if DEBUG 347 WARN("\n%s", debug_msg); 348 #else 349 ERROR("***Debug opened on closed chip***\n"); 350 #endif 351 } 352 } 353 354 #if STM32MP13 355 if (stm32_rng_init() != 0) { 356 panic(); 357 } 358 #endif 359 360 stm32mp1_arch_security_setup(); 361 362 print_reset_reason(); 363 364 #if STM32MP15 365 if (stm32mp_check_closed_device() == STM32MP_CHIP_SEC_CLOSED) { 366 update_monotonic_counter(); 367 } 368 #endif 369 370 stm32mp1_syscfg_enable_io_compensation_finish(); 371 372 fconf_populate("TB_FW", STM32MP_DTB_BASE); 373 374 stm32mp_io_setup(); 375 } 376 377 /******************************************************************************* 378 * This function can be used by the platforms to update/use image 379 * information for given `image_id`. 380 ******************************************************************************/ 381 int bl2_plat_handle_post_image_load(unsigned int image_id) 382 { 383 int err = 0; 384 bl_mem_params_node_t *bl_mem_params = get_bl_mem_params_node(image_id); 385 bl_mem_params_node_t *bl32_mem_params; 386 bl_mem_params_node_t *pager_mem_params __unused; 387 bl_mem_params_node_t *paged_mem_params __unused; 388 const struct dyn_cfg_dtb_info_t *config_info; 389 bl_mem_params_node_t *tos_fw_mem_params; 390 unsigned int i; 391 unsigned int idx; 392 unsigned long long ddr_top __unused; 393 const unsigned int image_ids[] = { 394 BL32_IMAGE_ID, 395 BL33_IMAGE_ID, 396 HW_CONFIG_ID, 397 TOS_FW_CONFIG_ID, 398 }; 399 400 assert(bl_mem_params != NULL); 401 402 switch (image_id) { 403 case FW_CONFIG_ID: 404 /* Set global DTB info for fixed fw_config information */ 405 set_config_info(STM32MP_FW_CONFIG_BASE, ~0UL, STM32MP_FW_CONFIG_MAX_SIZE, 406 FW_CONFIG_ID); 407 fconf_populate("FW_CONFIG", STM32MP_FW_CONFIG_BASE); 408 409 idx = dyn_cfg_dtb_info_get_index(TOS_FW_CONFIG_ID); 410 411 /* Iterate through all the fw config IDs */ 412 for (i = 0U; i < ARRAY_SIZE(image_ids); i++) { 413 if ((image_ids[i] == TOS_FW_CONFIG_ID) && (idx == FCONF_INVALID_IDX)) { 414 continue; 415 } 416 417 bl_mem_params = get_bl_mem_params_node(image_ids[i]); 418 assert(bl_mem_params != NULL); 419 420 config_info = FCONF_GET_PROPERTY(dyn_cfg, dtb, image_ids[i]); 421 if (config_info == NULL) { 422 continue; 423 } 424 425 bl_mem_params->image_info.image_base = config_info->config_addr; 426 bl_mem_params->image_info.image_max_size = config_info->config_max_size; 427 428 bl_mem_params->image_info.h.attr &= ~IMAGE_ATTRIB_SKIP_LOADING; 429 430 switch (image_ids[i]) { 431 case BL32_IMAGE_ID: 432 bl_mem_params->ep_info.pc = config_info->config_addr; 433 434 /* In case of OPTEE, initialize address space with tos_fw addr */ 435 pager_mem_params = get_bl_mem_params_node(BL32_EXTRA1_IMAGE_ID); 436 assert(pager_mem_params != NULL); 437 pager_mem_params->image_info.image_base = config_info->config_addr; 438 pager_mem_params->image_info.image_max_size = 439 config_info->config_max_size; 440 441 /* Init base and size for pager if exist */ 442 paged_mem_params = get_bl_mem_params_node(BL32_EXTRA2_IMAGE_ID); 443 if (paged_mem_params != NULL) { 444 paged_mem_params->image_info.image_base = STM32MP_DDR_BASE + 445 (dt_get_ddr_size() - STM32MP_DDR_S_SIZE - 446 STM32MP_DDR_SHMEM_SIZE); 447 paged_mem_params->image_info.image_max_size = 448 STM32MP_DDR_S_SIZE; 449 } 450 break; 451 452 case BL33_IMAGE_ID: 453 bl_mem_params->ep_info.pc = config_info->config_addr; 454 break; 455 456 case HW_CONFIG_ID: 457 case TOS_FW_CONFIG_ID: 458 break; 459 460 default: 461 return -EINVAL; 462 } 463 } 464 break; 465 466 case BL32_IMAGE_ID: 467 if (optee_header_is_valid(bl_mem_params->image_info.image_base)) { 468 image_info_t *paged_image_info = NULL; 469 470 /* BL32 is OP-TEE header */ 471 bl_mem_params->ep_info.pc = bl_mem_params->image_info.image_base; 472 pager_mem_params = get_bl_mem_params_node(BL32_EXTRA1_IMAGE_ID); 473 assert(pager_mem_params != NULL); 474 475 paged_mem_params = get_bl_mem_params_node(BL32_EXTRA2_IMAGE_ID); 476 if (paged_mem_params != NULL) { 477 paged_image_info = &paged_mem_params->image_info; 478 } 479 480 err = parse_optee_header(&bl_mem_params->ep_info, 481 &pager_mem_params->image_info, 482 paged_image_info); 483 if (err != 0) { 484 ERROR("OPTEE header parse error.\n"); 485 panic(); 486 } 487 488 /* Set optee boot info from parsed header data */ 489 if (paged_mem_params != NULL) { 490 bl_mem_params->ep_info.args.arg0 = 491 paged_mem_params->image_info.image_base; 492 } else { 493 bl_mem_params->ep_info.args.arg0 = 0U; 494 } 495 496 bl_mem_params->ep_info.args.arg1 = 0U; /* Unused */ 497 bl_mem_params->ep_info.args.arg2 = 0U; /* No DT supported */ 498 } else { 499 bl_mem_params->ep_info.pc = bl_mem_params->image_info.image_base; 500 tos_fw_mem_params = get_bl_mem_params_node(TOS_FW_CONFIG_ID); 501 assert(tos_fw_mem_params != NULL); 502 bl_mem_params->image_info.image_max_size += 503 tos_fw_mem_params->image_info.image_max_size; 504 bl_mem_params->ep_info.args.arg0 = 0; 505 } 506 break; 507 508 case BL33_IMAGE_ID: 509 bl32_mem_params = get_bl_mem_params_node(BL32_IMAGE_ID); 510 assert(bl32_mem_params != NULL); 511 bl32_mem_params->ep_info.lr_svc = bl_mem_params->ep_info.pc; 512 #if PSA_FWU_SUPPORT 513 stm32mp1_fwu_set_boot_idx(); 514 #endif /* PSA_FWU_SUPPORT */ 515 break; 516 517 default: 518 /* Do nothing in default case */ 519 break; 520 } 521 522 #if STM32MP_SDMMC || STM32MP_EMMC 523 /* 524 * Invalidate remaining data read from MMC but not flushed by load_image_flush(). 525 * We take the worst case which is 2 MMC blocks. 526 */ 527 if ((image_id != FW_CONFIG_ID) && 528 ((bl_mem_params->image_info.h.attr & IMAGE_ATTRIB_SKIP_LOADING) == 0U)) { 529 inv_dcache_range(bl_mem_params->image_info.image_base + 530 bl_mem_params->image_info.image_size, 531 2U * MMC_BLOCK_SIZE); 532 } 533 #endif /* STM32MP_SDMMC || STM32MP_EMMC */ 534 535 return err; 536 } 537 538 void bl2_el3_plat_prepare_exit(void) 539 { 540 #if STM32MP_UART_PROGRAMMER || STM32MP_USB_PROGRAMMER 541 uint16_t boot_itf = stm32mp_get_boot_itf_selected(); 542 543 if ((boot_itf == BOOT_API_CTX_BOOT_INTERFACE_SEL_SERIAL_UART) || 544 (boot_itf == BOOT_API_CTX_BOOT_INTERFACE_SEL_SERIAL_USB)) { 545 /* Invalidate the downloaded buffer used with io_memmap */ 546 inv_dcache_range(DWL_BUFFER_BASE, DWL_BUFFER_SIZE); 547 } 548 #endif /* STM32MP_UART_PROGRAMMER || STM32MP_USB_PROGRAMMER */ 549 550 stm32mp1_security_setup(); 551 } 552