1 /* 2 * Copyright (c) 2015-2018, 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 <stddef.h> 10 #include <string.h> 11 12 #include <platform_def.h> 13 14 #include <arch.h> 15 #include <arch_helpers.h> 16 #include <bl31/bl31.h> 17 #include <common/bl_common.h> 18 #include <common/debug.h> 19 #include <cortex_a53.h> 20 #include <cortex_a57.h> 21 #include <denver.h> 22 #include <drivers/console.h> 23 #include <lib/mmio.h> 24 #include <lib/utils.h> 25 #include <lib/utils_def.h> 26 #include <plat/common/platform.h> 27 28 #include <memctrl.h> 29 #include <tegra_def.h> 30 #include <tegra_platform.h> 31 #include <tegra_private.h> 32 33 /* length of Trusty's input parameters (in bytes) */ 34 #define TRUSTY_PARAMS_LEN_BYTES (4096*2) 35 36 extern void memcpy16(void *dest, const void *src, unsigned int length); 37 38 /******************************************************************************* 39 * Declarations of linker defined symbols which will help us find the layout 40 * of trusted SRAM 41 ******************************************************************************/ 42 43 IMPORT_SYM(unsigned long, __RW_START__, BL31_RW_START); 44 IMPORT_SYM(unsigned long, __RW_END__, BL31_RW_END); 45 IMPORT_SYM(unsigned long, __RODATA_START__, BL31_RODATA_BASE); 46 IMPORT_SYM(unsigned long, __RODATA_END__, BL31_RODATA_END); 47 IMPORT_SYM(unsigned long, __TEXT_START__, TEXT_START); 48 IMPORT_SYM(unsigned long, __TEXT_END__, TEXT_END); 49 50 extern uint64_t tegra_bl31_phys_base; 51 extern uint64_t tegra_console_base; 52 53 54 static entry_point_info_t bl33_image_ep_info, bl32_image_ep_info; 55 static plat_params_from_bl2_t plat_bl31_params_from_bl2 = { 56 .tzdram_size = (uint64_t)TZDRAM_SIZE 57 }; 58 static unsigned long bl32_mem_size; 59 static unsigned long bl32_boot_params; 60 61 /******************************************************************************* 62 * This variable holds the non-secure image entry address 63 ******************************************************************************/ 64 extern uint64_t ns_image_entrypoint; 65 66 /******************************************************************************* 67 * The following platform setup functions are weakly defined. They 68 * provide typical implementations that will be overridden by a SoC. 69 ******************************************************************************/ 70 #pragma weak plat_early_platform_setup 71 #pragma weak plat_get_bl31_params 72 #pragma weak plat_get_bl31_plat_params 73 74 void plat_early_platform_setup(void) 75 { 76 ; /* do nothing */ 77 } 78 79 struct tegra_bl31_params *plat_get_bl31_params(void) 80 { 81 return NULL; 82 } 83 84 plat_params_from_bl2_t *plat_get_bl31_plat_params(void) 85 { 86 return NULL; 87 } 88 89 /******************************************************************************* 90 * Return a pointer to the 'entry_point_info' structure of the next image for 91 * security state specified. BL33 corresponds to the non-secure image type 92 * while BL32 corresponds to the secure image type. 93 ******************************************************************************/ 94 entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type) 95 { 96 if (type == NON_SECURE) 97 return &bl33_image_ep_info; 98 99 /* return BL32 entry point info if it is valid */ 100 if (type == SECURE && bl32_image_ep_info.pc) 101 return &bl32_image_ep_info; 102 103 return NULL; 104 } 105 106 /******************************************************************************* 107 * Return a pointer to the 'plat_params_from_bl2_t' structure. The BL2 image 108 * passes this platform specific information. 109 ******************************************************************************/ 110 plat_params_from_bl2_t *bl31_get_plat_params(void) 111 { 112 return &plat_bl31_params_from_bl2; 113 } 114 115 /******************************************************************************* 116 * Perform any BL31 specific platform actions. Populate the BL33 and BL32 image 117 * info. 118 ******************************************************************************/ 119 void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1, 120 u_register_t arg2, u_register_t arg3) 121 { 122 struct tegra_bl31_params *arg_from_bl2 = (struct tegra_bl31_params *) arg0; 123 plat_params_from_bl2_t *plat_params = (plat_params_from_bl2_t *)arg1; 124 image_info_t bl32_img_info = { {0} }; 125 uint64_t tzdram_start, tzdram_end, bl32_start, bl32_end; 126 uint32_t console_clock; 127 128 /* 129 * For RESET_TO_BL31 systems, BL31 is the first bootloader to run so 130 * there's no argument to relay from a previous bootloader. Platforms 131 * might use custom ways to get arguments, so provide handlers which 132 * they can override. 133 */ 134 if (arg_from_bl2 == NULL) 135 arg_from_bl2 = plat_get_bl31_params(); 136 if (plat_params == NULL) 137 plat_params = plat_get_bl31_plat_params(); 138 139 /* 140 * Copy BL3-3, BL3-2 entry point information. 141 * They are stored in Secure RAM, in BL2's address space. 142 */ 143 assert(arg_from_bl2); 144 assert(arg_from_bl2->bl33_ep_info); 145 bl33_image_ep_info = *arg_from_bl2->bl33_ep_info; 146 147 if (arg_from_bl2->bl32_ep_info) { 148 bl32_image_ep_info = *arg_from_bl2->bl32_ep_info; 149 bl32_mem_size = arg_from_bl2->bl32_ep_info->args.arg0; 150 bl32_boot_params = arg_from_bl2->bl32_ep_info->args.arg2; 151 } 152 153 /* 154 * Parse platform specific parameters - TZDRAM aperture base and size 155 */ 156 assert(plat_params); 157 plat_bl31_params_from_bl2.tzdram_base = plat_params->tzdram_base; 158 plat_bl31_params_from_bl2.tzdram_size = plat_params->tzdram_size; 159 plat_bl31_params_from_bl2.uart_id = plat_params->uart_id; 160 161 /* 162 * It is very important that we run either from TZDRAM or TZSRAM base. 163 * Add an explicit check here. 164 */ 165 if ((plat_bl31_params_from_bl2.tzdram_base != BL31_BASE) && 166 (TEGRA_TZRAM_BASE != BL31_BASE)) 167 panic(); 168 169 /* 170 * Reference clock used by the FPGAs is a lot slower. 171 */ 172 if (tegra_platform_is_fpga() == 1U) { 173 console_clock = TEGRA_BOOT_UART_CLK_13_MHZ; 174 } else { 175 console_clock = TEGRA_BOOT_UART_CLK_408_MHZ; 176 } 177 178 /* 179 * Get the base address of the UART controller to be used for the 180 * console 181 */ 182 tegra_console_base = plat_get_console_from_id(plat_params->uart_id); 183 184 if (tegra_console_base != (uint64_t)0) { 185 /* 186 * Configure the UART port to be used as the console 187 */ 188 console_init(tegra_console_base, console_clock, 189 TEGRA_CONSOLE_BAUDRATE); 190 } 191 192 /* 193 * Initialize delay timer 194 */ 195 tegra_delay_timer_init(); 196 197 /* 198 * Do initial security configuration to allow DRAM/device access. 199 */ 200 tegra_memctrl_tzdram_setup(plat_bl31_params_from_bl2.tzdram_base, 201 plat_bl31_params_from_bl2.tzdram_size); 202 203 /* 204 * The previous bootloader might not have placed the BL32 image 205 * inside the TZDRAM. We check the BL32 image info to find out 206 * the base/PC values and relocate the image if necessary. 207 */ 208 if (arg_from_bl2->bl32_image_info) { 209 210 bl32_img_info = *arg_from_bl2->bl32_image_info; 211 212 /* Relocate BL32 if it resides outside of the TZDRAM */ 213 tzdram_start = plat_bl31_params_from_bl2.tzdram_base; 214 tzdram_end = plat_bl31_params_from_bl2.tzdram_base + 215 plat_bl31_params_from_bl2.tzdram_size; 216 bl32_start = bl32_img_info.image_base; 217 bl32_end = bl32_img_info.image_base + bl32_img_info.image_size; 218 219 assert(tzdram_end > tzdram_start); 220 assert(bl32_end > bl32_start); 221 assert(bl32_image_ep_info.pc > tzdram_start); 222 assert(bl32_image_ep_info.pc < tzdram_end); 223 224 /* relocate BL32 */ 225 if (bl32_start >= tzdram_end || bl32_end <= tzdram_start) { 226 227 INFO("Relocate BL32 to TZDRAM\n"); 228 229 memcpy16((void *)(uintptr_t)bl32_image_ep_info.pc, 230 (void *)(uintptr_t)bl32_start, 231 bl32_img_info.image_size); 232 233 /* clean up non-secure intermediate buffer */ 234 zeromem((void *)(uintptr_t)bl32_start, 235 bl32_img_info.image_size); 236 } 237 } 238 239 /* Early platform setup for Tegra SoCs */ 240 plat_early_platform_setup(); 241 242 INFO("BL3-1: Boot CPU: %s Processor [%lx]\n", 243 (((read_midr() >> MIDR_IMPL_SHIFT) & MIDR_IMPL_MASK) 244 == DENVER_IMPL) ? "Denver" : "ARM", read_mpidr()); 245 } 246 247 #ifdef SPD_trusty 248 void plat_trusty_set_boot_args(aapcs64_params_t *args) 249 { 250 args->arg0 = bl32_mem_size; 251 args->arg1 = bl32_boot_params; 252 args->arg2 = TRUSTY_PARAMS_LEN_BYTES; 253 } 254 #endif 255 256 /******************************************************************************* 257 * Initialize the gic, configure the SCR. 258 ******************************************************************************/ 259 void bl31_platform_setup(void) 260 { 261 uint32_t tmp_reg; 262 263 /* Initialize the gic cpu and distributor interfaces */ 264 plat_gic_setup(); 265 266 /* 267 * Setup secondary CPU POR infrastructure. 268 */ 269 plat_secondary_setup(); 270 271 /* 272 * Initial Memory Controller configuration. 273 */ 274 tegra_memctrl_setup(); 275 276 /* 277 * Set up the TZRAM memory aperture to allow only secure world 278 * access 279 */ 280 tegra_memctrl_tzram_setup(TEGRA_TZRAM_BASE, TEGRA_TZRAM_SIZE); 281 282 /* Set the next EL to be AArch64 */ 283 tmp_reg = SCR_RES1_BITS | SCR_RW_BIT; 284 write_scr(tmp_reg); 285 286 INFO("BL3-1: Tegra platform setup complete\n"); 287 } 288 289 /******************************************************************************* 290 * Perform any BL3-1 platform runtime setup prior to BL3-1 cold boot exit 291 ******************************************************************************/ 292 void bl31_plat_runtime_setup(void) 293 { 294 /* 295 * During boot, USB3 and flash media (SDMMC/SATA) devices need 296 * access to IRAM. Because these clients connect to the MC and 297 * do not have a direct path to the IRAM, the MC implements AHB 298 * redirection during boot to allow path to IRAM. In this mode 299 * accesses to a programmed memory address aperture are directed 300 * to the AHB bus, allowing access to the IRAM. This mode must be 301 * disabled before we jump to the non-secure world. 302 */ 303 tegra_memctrl_disable_ahb_redirection(); 304 } 305 306 /******************************************************************************* 307 * Perform the very early platform specific architectural setup here. At the 308 * moment this only intializes the mmu in a quick and dirty way. 309 ******************************************************************************/ 310 void bl31_plat_arch_setup(void) 311 { 312 unsigned long rw_start = BL31_RW_START; 313 unsigned long rw_size = BL31_RW_END - BL31_RW_START; 314 unsigned long rodata_start = BL31_RODATA_BASE; 315 unsigned long rodata_size = BL31_RODATA_END - BL31_RODATA_BASE; 316 unsigned long code_base = TEXT_START; 317 unsigned long code_size = TEXT_END - TEXT_START; 318 const mmap_region_t *plat_mmio_map = NULL; 319 #if USE_COHERENT_MEM 320 unsigned long coh_start, coh_size; 321 #endif 322 plat_params_from_bl2_t *params_from_bl2 = bl31_get_plat_params(); 323 324 /* add memory regions */ 325 mmap_add_region(rw_start, rw_start, 326 rw_size, 327 MT_MEMORY | MT_RW | MT_SECURE); 328 mmap_add_region(rodata_start, rodata_start, 329 rodata_size, 330 MT_RO_DATA | MT_SECURE); 331 mmap_add_region(code_base, code_base, 332 code_size, 333 MT_CODE | MT_SECURE); 334 335 /* map TZDRAM used by BL31 as coherent memory */ 336 if (TEGRA_TZRAM_BASE == tegra_bl31_phys_base) { 337 mmap_add_region(params_from_bl2->tzdram_base, 338 params_from_bl2->tzdram_base, 339 BL31_SIZE, 340 MT_DEVICE | MT_RW | MT_SECURE); 341 } 342 343 #if USE_COHERENT_MEM 344 coh_start = total_base + (BL_COHERENT_RAM_BASE - BL31_RO_BASE); 345 coh_size = BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE; 346 347 mmap_add_region(coh_start, coh_start, 348 coh_size, 349 MT_DEVICE | MT_RW | MT_SECURE); 350 #endif 351 352 /* map on-chip free running uS timer */ 353 mmap_add_region(page_align((uint64_t)TEGRA_TMRUS_BASE, 0), 354 page_align((uint64_t)TEGRA_TMRUS_BASE, 0), 355 (uint64_t)TEGRA_TMRUS_SIZE, 356 MT_DEVICE | MT_RO | MT_SECURE); 357 358 /* add MMIO space */ 359 plat_mmio_map = plat_get_mmio_map(); 360 if (plat_mmio_map) 361 mmap_add(plat_mmio_map); 362 else 363 WARN("MMIO map not available\n"); 364 365 /* set up translation tables */ 366 init_xlat_tables(); 367 368 /* enable the MMU */ 369 enable_mmu_el3(0); 370 371 INFO("BL3-1: Tegra: MMU enabled\n"); 372 } 373 374 /******************************************************************************* 375 * Check if the given NS DRAM range is valid 376 ******************************************************************************/ 377 int bl31_check_ns_address(uint64_t base, uint64_t size_in_bytes) 378 { 379 uint64_t end = base + size_in_bytes; 380 381 /* 382 * Check if the NS DRAM address is valid 383 */ 384 if ((base < TEGRA_DRAM_BASE) || (end > TEGRA_DRAM_END)) { 385 ERROR("NS address is out-of-bounds!\n"); 386 return -EFAULT; 387 } 388 389 /* 390 * TZDRAM aperture contains the BL31 and BL32 images, so we need 391 * to check if the NS DRAM range overlaps the TZDRAM aperture. 392 */ 393 if ((base < TZDRAM_END) && (end > tegra_bl31_phys_base)) { 394 ERROR("NS address overlaps TZDRAM!\n"); 395 return -ENOTSUP; 396 } 397 398 /* valid NS address */ 399 return 0; 400 } 401