1 /* 2 * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 #include <string.h> 9 10 #include <platform_def.h> 11 12 #include <arch_helpers.h> 13 #include <common/bl_common.h> 14 #include <common/debug.h> 15 #include <common/desc_image_load.h> 16 #include <drivers/delay_timer.h> 17 #include <drivers/generic_delay_timer.h> 18 #include <drivers/st/bsec.h> 19 #include <drivers/st/stm32_console.h> 20 #include <drivers/st/stm32_iwdg.h> 21 #include <drivers/st/stm32mp_pmic.h> 22 #include <drivers/st/stm32mp_reset.h> 23 #include <drivers/st/stm32mp1_clk.h> 24 #include <drivers/st/stm32mp1_pwr.h> 25 #include <drivers/st/stm32mp1_ram.h> 26 #include <lib/mmio.h> 27 #include <lib/optee_utils.h> 28 #include <lib/xlat_tables/xlat_tables_v2.h> 29 #include <plat/common/platform.h> 30 31 #include <stm32mp1_context.h> 32 #include <stm32mp1_dbgmcu.h> 33 34 #define RESET_TIMEOUT_US_1MS 1000U 35 36 static console_t console; 37 static struct stm32mp_auth_ops stm32mp1_auth_ops; 38 39 static void print_reset_reason(void) 40 { 41 uint32_t rstsr = mmio_read_32(stm32mp_rcc_base() + RCC_MP_RSTSCLRR); 42 43 if (rstsr == 0U) { 44 WARN("Reset reason unknown\n"); 45 return; 46 } 47 48 INFO("Reset reason (0x%x):\n", rstsr); 49 50 if ((rstsr & RCC_MP_RSTSCLRR_PADRSTF) == 0U) { 51 if ((rstsr & RCC_MP_RSTSCLRR_STDBYRSTF) != 0U) { 52 INFO("System exits from STANDBY\n"); 53 return; 54 } 55 56 if ((rstsr & RCC_MP_RSTSCLRR_CSTDBYRSTF) != 0U) { 57 INFO("MPU exits from CSTANDBY\n"); 58 return; 59 } 60 } 61 62 if ((rstsr & RCC_MP_RSTSCLRR_PORRSTF) != 0U) { 63 INFO(" Power-on Reset (rst_por)\n"); 64 return; 65 } 66 67 if ((rstsr & RCC_MP_RSTSCLRR_BORRSTF) != 0U) { 68 INFO(" Brownout Reset (rst_bor)\n"); 69 return; 70 } 71 72 if ((rstsr & RCC_MP_RSTSCLRR_MCSYSRSTF) != 0U) { 73 if ((rstsr & RCC_MP_RSTSCLRR_PADRSTF) != 0U) { 74 INFO(" System reset generated by MCU (MCSYSRST)\n"); 75 } else { 76 INFO(" Local reset generated by MCU (MCSYSRST)\n"); 77 } 78 return; 79 } 80 81 if ((rstsr & RCC_MP_RSTSCLRR_MPSYSRSTF) != 0U) { 82 INFO(" System reset generated by MPU (MPSYSRST)\n"); 83 return; 84 } 85 86 if ((rstsr & RCC_MP_RSTSCLRR_HCSSRSTF) != 0U) { 87 INFO(" Reset due to a clock failure on HSE\n"); 88 return; 89 } 90 91 if ((rstsr & RCC_MP_RSTSCLRR_IWDG1RSTF) != 0U) { 92 INFO(" IWDG1 Reset (rst_iwdg1)\n"); 93 return; 94 } 95 96 if ((rstsr & RCC_MP_RSTSCLRR_IWDG2RSTF) != 0U) { 97 INFO(" IWDG2 Reset (rst_iwdg2)\n"); 98 return; 99 } 100 101 if ((rstsr & RCC_MP_RSTSCLRR_MPUP0RSTF) != 0U) { 102 INFO(" MPU Processor 0 Reset\n"); 103 return; 104 } 105 106 if ((rstsr & RCC_MP_RSTSCLRR_MPUP1RSTF) != 0U) { 107 INFO(" MPU Processor 1 Reset\n"); 108 return; 109 } 110 111 if ((rstsr & RCC_MP_RSTSCLRR_PADRSTF) != 0U) { 112 INFO(" Pad Reset from NRST\n"); 113 return; 114 } 115 116 if ((rstsr & RCC_MP_RSTSCLRR_VCORERSTF) != 0U) { 117 INFO(" Reset due to a failure of VDD_CORE\n"); 118 return; 119 } 120 121 ERROR(" Unidentified reset reason\n"); 122 } 123 124 void bl2_el3_early_platform_setup(u_register_t arg0, 125 u_register_t arg1 __unused, 126 u_register_t arg2 __unused, 127 u_register_t arg3 __unused) 128 { 129 stm32mp_save_boot_ctx_address(arg0); 130 } 131 132 void bl2_platform_setup(void) 133 { 134 int ret; 135 uint32_t ddr_ns_size; 136 137 if (dt_pmic_status() > 0) { 138 initialize_pmic(); 139 } 140 141 ret = stm32mp1_ddr_probe(); 142 if (ret < 0) { 143 ERROR("Invalid DDR init: error %d\n", ret); 144 panic(); 145 } 146 147 ddr_ns_size = stm32mp_get_ddr_ns_size(); 148 assert(ddr_ns_size > 0U); 149 150 /* Map non secure DDR for BL33 load, now with cacheable attribute */ 151 ret = mmap_add_dynamic_region(STM32MP_DDR_BASE, STM32MP_DDR_BASE, 152 ddr_ns_size, MT_MEMORY | MT_RW | MT_NS); 153 assert(ret == 0); 154 155 #ifdef AARCH32_SP_OPTEE 156 INFO("BL2 runs OP-TEE setup\n"); 157 158 /* Map secure DDR for OP-TEE paged area */ 159 ret = mmap_add_dynamic_region(STM32MP_DDR_BASE + ddr_ns_size, 160 STM32MP_DDR_BASE + ddr_ns_size, 161 STM32MP_DDR_S_SIZE, 162 MT_MEMORY | MT_RW | MT_SECURE); 163 assert(ret == 0); 164 165 /* Initialize tzc400 after DDR initialization */ 166 stm32mp1_security_setup(); 167 #else 168 INFO("BL2 runs SP_MIN setup\n"); 169 #endif 170 } 171 172 void bl2_el3_plat_arch_setup(void) 173 { 174 int32_t result; 175 struct dt_node_info dt_uart_info; 176 const char *board_model; 177 boot_api_context_t *boot_context = 178 (boot_api_context_t *)stm32mp_get_boot_ctx_address(); 179 uint32_t clk_rate; 180 uintptr_t pwr_base; 181 uintptr_t rcc_base; 182 183 mmap_add_region(BL_CODE_BASE, BL_CODE_BASE, 184 BL_CODE_END - BL_CODE_BASE, 185 MT_CODE | MT_SECURE); 186 187 #ifdef AARCH32_SP_OPTEE 188 mmap_add_region(STM32MP_OPTEE_BASE, STM32MP_OPTEE_BASE, 189 STM32MP_OPTEE_SIZE, 190 MT_MEMORY | MT_RW | MT_SECURE); 191 #else 192 /* Prevent corruption of preloaded BL32 */ 193 mmap_add_region(BL32_BASE, BL32_BASE, 194 BL32_LIMIT - BL32_BASE, 195 MT_RO_DATA | MT_SECURE); 196 #endif 197 /* Prevent corruption of preloaded Device Tree */ 198 mmap_add_region(DTB_BASE, DTB_BASE, 199 DTB_LIMIT - DTB_BASE, 200 MT_RO_DATA | MT_SECURE); 201 202 configure_mmu(); 203 204 if (dt_open_and_check() < 0) { 205 panic(); 206 } 207 208 pwr_base = stm32mp_pwr_base(); 209 rcc_base = stm32mp_rcc_base(); 210 211 /* 212 * Disable the backup domain write protection. 213 * The protection is enable at each reset by hardware 214 * and must be disabled by software. 215 */ 216 mmio_setbits_32(pwr_base + PWR_CR1, PWR_CR1_DBP); 217 218 while ((mmio_read_32(pwr_base + PWR_CR1) & PWR_CR1_DBP) == 0U) { 219 ; 220 } 221 222 if (bsec_probe() != 0) { 223 panic(); 224 } 225 226 /* Reset backup domain on cold boot cases */ 227 if ((mmio_read_32(rcc_base + RCC_BDCR) & RCC_BDCR_RTCSRC_MASK) == 0U) { 228 mmio_setbits_32(rcc_base + RCC_BDCR, RCC_BDCR_VSWRST); 229 230 while ((mmio_read_32(rcc_base + RCC_BDCR) & RCC_BDCR_VSWRST) == 231 0U) { 232 ; 233 } 234 235 mmio_clrbits_32(rcc_base + RCC_BDCR, RCC_BDCR_VSWRST); 236 } 237 238 /* Disable MCKPROT */ 239 mmio_clrbits_32(rcc_base + RCC_TZCR, RCC_TZCR_MCKPROT); 240 241 generic_delay_timer_init(); 242 243 if (stm32mp1_clk_probe() < 0) { 244 panic(); 245 } 246 247 if (stm32mp1_clk_init() < 0) { 248 panic(); 249 } 250 251 stm32mp1_syscfg_init(); 252 253 result = dt_get_stdout_uart_info(&dt_uart_info); 254 255 if ((result <= 0) || 256 (dt_uart_info.status == 0U) || 257 (dt_uart_info.clock < 0) || 258 (dt_uart_info.reset < 0)) { 259 goto skip_console_init; 260 } 261 262 if (dt_set_stdout_pinctrl() != 0) { 263 goto skip_console_init; 264 } 265 266 stm32mp_clk_enable((unsigned long)dt_uart_info.clock); 267 268 if (stm32mp_reset_assert((uint32_t)dt_uart_info.reset, 269 RESET_TIMEOUT_US_1MS) != 0) { 270 panic(); 271 } 272 273 udelay(2); 274 275 if (stm32mp_reset_deassert((uint32_t)dt_uart_info.reset, 276 RESET_TIMEOUT_US_1MS) != 0) { 277 panic(); 278 } 279 280 mdelay(1); 281 282 clk_rate = stm32mp_clk_get_rate((unsigned long)dt_uart_info.clock); 283 284 if (console_stm32_register(dt_uart_info.base, clk_rate, 285 STM32MP_UART_BAUDRATE, &console) == 0) { 286 panic(); 287 } 288 289 console_set_scope(&console, CONSOLE_FLAG_BOOT | 290 CONSOLE_FLAG_CRASH | CONSOLE_FLAG_TRANSLATE_CRLF); 291 292 stm32mp_print_cpuinfo(); 293 294 board_model = dt_get_board_model(); 295 if (board_model != NULL) { 296 NOTICE("Model: %s\n", board_model); 297 } 298 299 stm32mp_print_boardinfo(); 300 301 if (boot_context->auth_status != BOOT_API_CTX_AUTH_NO) { 302 NOTICE("Bootrom authentication %s\n", 303 (boot_context->auth_status == BOOT_API_CTX_AUTH_FAILED) ? 304 "failed" : "succeeded"); 305 } 306 307 skip_console_init: 308 if (stm32_iwdg_init() < 0) { 309 panic(); 310 } 311 312 stm32_iwdg_refresh(); 313 314 result = stm32mp1_dbgmcu_freeze_iwdg2(); 315 if (result != 0) { 316 INFO("IWDG2 freeze error : %i\n", result); 317 } 318 319 if (stm32_save_boot_interface(boot_context->boot_interface_selected, 320 boot_context->boot_interface_instance) != 321 0) { 322 ERROR("Cannot save boot interface\n"); 323 } 324 325 stm32mp1_auth_ops.check_key = boot_context->bootrom_ecdsa_check_key; 326 stm32mp1_auth_ops.verify_signature = 327 boot_context->bootrom_ecdsa_verify_signature; 328 329 stm32mp_init_auth(&stm32mp1_auth_ops); 330 331 stm32mp1_arch_security_setup(); 332 333 print_reset_reason(); 334 335 stm32mp_io_setup(); 336 } 337 338 #if defined(AARCH32_SP_OPTEE) 339 /******************************************************************************* 340 * This function can be used by the platforms to update/use image 341 * information for given `image_id`. 342 ******************************************************************************/ 343 int bl2_plat_handle_post_image_load(unsigned int image_id) 344 { 345 int err = 0; 346 bl_mem_params_node_t *bl_mem_params = get_bl_mem_params_node(image_id); 347 bl_mem_params_node_t *bl32_mem_params; 348 bl_mem_params_node_t *pager_mem_params; 349 bl_mem_params_node_t *paged_mem_params; 350 351 assert(bl_mem_params != NULL); 352 353 switch (image_id) { 354 case BL32_IMAGE_ID: 355 bl_mem_params->ep_info.pc = 356 bl_mem_params->image_info.image_base; 357 358 pager_mem_params = get_bl_mem_params_node(BL32_EXTRA1_IMAGE_ID); 359 assert(pager_mem_params != NULL); 360 pager_mem_params->image_info.image_base = STM32MP_OPTEE_BASE; 361 pager_mem_params->image_info.image_max_size = 362 STM32MP_OPTEE_SIZE; 363 364 paged_mem_params = get_bl_mem_params_node(BL32_EXTRA2_IMAGE_ID); 365 assert(paged_mem_params != NULL); 366 paged_mem_params->image_info.image_base = STM32MP_DDR_BASE + 367 stm32mp_get_ddr_ns_size(); 368 paged_mem_params->image_info.image_max_size = 369 STM32MP_DDR_S_SIZE; 370 371 err = parse_optee_header(&bl_mem_params->ep_info, 372 &pager_mem_params->image_info, 373 &paged_mem_params->image_info); 374 if (err) { 375 ERROR("OPTEE header parse error.\n"); 376 panic(); 377 } 378 379 /* Set optee boot info from parsed header data */ 380 bl_mem_params->ep_info.pc = 381 pager_mem_params->image_info.image_base; 382 bl_mem_params->ep_info.args.arg0 = 383 paged_mem_params->image_info.image_base; 384 bl_mem_params->ep_info.args.arg1 = 0; /* Unused */ 385 bl_mem_params->ep_info.args.arg2 = 0; /* No DT supported */ 386 break; 387 388 case BL33_IMAGE_ID: 389 bl32_mem_params = get_bl_mem_params_node(BL32_IMAGE_ID); 390 assert(bl32_mem_params != NULL); 391 bl32_mem_params->ep_info.lr_svc = bl_mem_params->ep_info.pc; 392 break; 393 394 default: 395 /* Do nothing in default case */ 396 break; 397 } 398 399 return err; 400 } 401 #endif 402