1 /* 2 * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arch_helpers.h> 8 #include <arm_def.h> 9 #include <assert.h> 10 #include <bl_common.h> 11 #include <console.h> 12 #include <debug.h> 13 #include <desc_image_load.h> 14 #include <generic_delay_timer.h> 15 #ifdef SPD_opteed 16 #include <optee_utils.h> 17 #endif 18 #include <plat_arm.h> 19 #include <platform.h> 20 #include <platform_def.h> 21 #include <string.h> 22 #include <utils.h> 23 24 /* Data structure which holds the extents of the trusted SRAM for BL2 */ 25 static meminfo_t bl2_tzram_layout __aligned(CACHE_WRITEBACK_GRANULE); 26 27 /* 28 * Check that BL2_BASE is atleast a page over ARM_BL_RAM_BASE. The page is for 29 * `meminfo_t` data structure and TB_FW_CONFIG passed from BL1. Not needed 30 * when BL2 is compiled for BL_AT_EL3 as BL2 doesn't need any info from BL1 and 31 * BL2 is loaded at base of usable SRAM. 32 */ 33 #if BL2_AT_EL3 34 #define BL1_MEMINFO_OFFSET 0x0 35 #else 36 #define BL1_MEMINFO_OFFSET PAGE_SIZE 37 #endif 38 39 CASSERT(BL2_BASE >= (ARM_BL_RAM_BASE + BL1_MEMINFO_OFFSET), assert_bl2_base_overflows); 40 41 /* Weak definitions may be overridden in specific ARM standard platform */ 42 #pragma weak bl2_early_platform_setup 43 #pragma weak bl2_platform_setup 44 #pragma weak bl2_plat_arch_setup 45 #pragma weak bl2_plat_sec_mem_layout 46 47 #if LOAD_IMAGE_V2 48 49 #pragma weak bl2_plat_handle_post_image_load 50 51 #else /* LOAD_IMAGE_V2 */ 52 53 /******************************************************************************* 54 * This structure represents the superset of information that is passed to 55 * BL31, e.g. while passing control to it from BL2, bl31_params 56 * and other platform specific params 57 ******************************************************************************/ 58 typedef struct bl2_to_bl31_params_mem { 59 bl31_params_t bl31_params; 60 image_info_t bl31_image_info; 61 image_info_t bl32_image_info; 62 image_info_t bl33_image_info; 63 entry_point_info_t bl33_ep_info; 64 entry_point_info_t bl32_ep_info; 65 entry_point_info_t bl31_ep_info; 66 } bl2_to_bl31_params_mem_t; 67 68 69 static bl2_to_bl31_params_mem_t bl31_params_mem; 70 71 72 /* Weak definitions may be overridden in specific ARM standard platform */ 73 #pragma weak bl2_plat_get_bl31_params 74 #pragma weak bl2_plat_get_bl31_ep_info 75 #pragma weak bl2_plat_flush_bl31_params 76 #pragma weak bl2_plat_set_bl31_ep_info 77 #pragma weak bl2_plat_get_scp_bl2_meminfo 78 #pragma weak bl2_plat_get_bl32_meminfo 79 #pragma weak bl2_plat_set_bl32_ep_info 80 #pragma weak bl2_plat_get_bl33_meminfo 81 #pragma weak bl2_plat_set_bl33_ep_info 82 83 #if ARM_BL31_IN_DRAM 84 meminfo_t *bl2_plat_sec_mem_layout(void) 85 { 86 static meminfo_t bl2_dram_layout 87 __aligned(CACHE_WRITEBACK_GRANULE) = { 88 .total_base = BL31_BASE, 89 .total_size = (ARM_AP_TZC_DRAM1_BASE + 90 ARM_AP_TZC_DRAM1_SIZE) - BL31_BASE, 91 .free_base = BL31_BASE, 92 .free_size = (ARM_AP_TZC_DRAM1_BASE + 93 ARM_AP_TZC_DRAM1_SIZE) - BL31_BASE 94 }; 95 96 return &bl2_dram_layout; 97 } 98 #else 99 meminfo_t *bl2_plat_sec_mem_layout(void) 100 { 101 return &bl2_tzram_layout; 102 } 103 #endif /* ARM_BL31_IN_DRAM */ 104 105 /******************************************************************************* 106 * This function assigns a pointer to the memory that the platform has kept 107 * aside to pass platform specific and trusted firmware related information 108 * to BL31. This memory is allocated by allocating memory to 109 * bl2_to_bl31_params_mem_t structure which is a superset of all the 110 * structure whose information is passed to BL31 111 * NOTE: This function should be called only once and should be done 112 * before generating params to BL31 113 ******************************************************************************/ 114 bl31_params_t *bl2_plat_get_bl31_params(void) 115 { 116 bl31_params_t *bl2_to_bl31_params; 117 118 /* 119 * Initialise the memory for all the arguments that needs to 120 * be passed to BL31 121 */ 122 zeromem(&bl31_params_mem, sizeof(bl2_to_bl31_params_mem_t)); 123 124 /* Assign memory for TF related information */ 125 bl2_to_bl31_params = &bl31_params_mem.bl31_params; 126 SET_PARAM_HEAD(bl2_to_bl31_params, PARAM_BL31, VERSION_1, 0); 127 128 /* Fill BL31 related information */ 129 bl2_to_bl31_params->bl31_image_info = &bl31_params_mem.bl31_image_info; 130 SET_PARAM_HEAD(bl2_to_bl31_params->bl31_image_info, PARAM_IMAGE_BINARY, 131 VERSION_1, 0); 132 133 /* Fill BL32 related information if it exists */ 134 #ifdef BL32_BASE 135 bl2_to_bl31_params->bl32_ep_info = &bl31_params_mem.bl32_ep_info; 136 SET_PARAM_HEAD(bl2_to_bl31_params->bl32_ep_info, PARAM_EP, 137 VERSION_1, 0); 138 bl2_to_bl31_params->bl32_image_info = &bl31_params_mem.bl32_image_info; 139 SET_PARAM_HEAD(bl2_to_bl31_params->bl32_image_info, PARAM_IMAGE_BINARY, 140 VERSION_1, 0); 141 #endif /* BL32_BASE */ 142 143 /* Fill BL33 related information */ 144 bl2_to_bl31_params->bl33_ep_info = &bl31_params_mem.bl33_ep_info; 145 SET_PARAM_HEAD(bl2_to_bl31_params->bl33_ep_info, 146 PARAM_EP, VERSION_1, 0); 147 148 /* BL33 expects to receive the primary CPU MPID (through x0) */ 149 bl2_to_bl31_params->bl33_ep_info->args.arg0 = 0xffff & read_mpidr(); 150 151 bl2_to_bl31_params->bl33_image_info = &bl31_params_mem.bl33_image_info; 152 SET_PARAM_HEAD(bl2_to_bl31_params->bl33_image_info, PARAM_IMAGE_BINARY, 153 VERSION_1, 0); 154 155 return bl2_to_bl31_params; 156 } 157 158 /* Flush the TF params and the TF plat params */ 159 void bl2_plat_flush_bl31_params(void) 160 { 161 flush_dcache_range((unsigned long)&bl31_params_mem, 162 sizeof(bl2_to_bl31_params_mem_t)); 163 } 164 165 /******************************************************************************* 166 * This function returns a pointer to the shared memory that the platform 167 * has kept to point to entry point information of BL31 to BL2 168 ******************************************************************************/ 169 struct entry_point_info *bl2_plat_get_bl31_ep_info(void) 170 { 171 #if DEBUG 172 bl31_params_mem.bl31_ep_info.args.arg1 = ARM_BL31_PLAT_PARAM_VAL; 173 #endif 174 175 return &bl31_params_mem.bl31_ep_info; 176 } 177 #endif /* LOAD_IMAGE_V2 */ 178 179 /******************************************************************************* 180 * BL1 has passed the extents of the trusted SRAM that should be visible to BL2 181 * in x0. This memory layout is sitting at the base of the free trusted SRAM. 182 * Copy it to a safe location before its reclaimed by later BL2 functionality. 183 ******************************************************************************/ 184 void arm_bl2_early_platform_setup(meminfo_t *mem_layout) 185 { 186 /* Initialize the console to provide early debug support */ 187 console_init(PLAT_ARM_BOOT_UART_BASE, PLAT_ARM_BOOT_UART_CLK_IN_HZ, 188 ARM_CONSOLE_BAUDRATE); 189 190 /* Setup the BL2 memory layout */ 191 bl2_tzram_layout = *mem_layout; 192 193 /* Initialise the IO layer and register platform IO devices */ 194 plat_arm_io_setup(); 195 } 196 197 void bl2_early_platform_setup(meminfo_t *mem_layout) 198 { 199 arm_bl2_early_platform_setup(mem_layout); 200 generic_delay_timer_init(); 201 } 202 203 /* 204 * Perform ARM standard platform setup. 205 */ 206 void arm_bl2_platform_setup(void) 207 { 208 /* Initialize the secure environment */ 209 plat_arm_security_setup(); 210 211 #if defined(PLAT_ARM_MEM_PROT_ADDR) 212 arm_nor_psci_do_mem_protect(); 213 #endif 214 } 215 216 void bl2_platform_setup(void) 217 { 218 arm_bl2_platform_setup(); 219 } 220 221 /******************************************************************************* 222 * Perform the very early platform specific architectural setup here. At the 223 * moment this is only initializes the mmu in a quick and dirty way. 224 ******************************************************************************/ 225 void arm_bl2_plat_arch_setup(void) 226 { 227 arm_setup_page_tables(bl2_tzram_layout.total_base, 228 bl2_tzram_layout.total_size, 229 BL_CODE_BASE, 230 BL_CODE_END, 231 BL_RO_DATA_BASE, 232 BL_RO_DATA_END 233 #if USE_COHERENT_MEM 234 , BL_COHERENT_RAM_BASE, 235 BL_COHERENT_RAM_END 236 #endif 237 ); 238 239 #ifdef AARCH32 240 enable_mmu_secure(0); 241 #else 242 enable_mmu_el1(0); 243 #endif 244 } 245 246 void bl2_plat_arch_setup(void) 247 { 248 arm_bl2_plat_arch_setup(); 249 } 250 251 #if LOAD_IMAGE_V2 252 int arm_bl2_handle_post_image_load(unsigned int image_id) 253 { 254 int err = 0; 255 bl_mem_params_node_t *bl_mem_params = get_bl_mem_params_node(image_id); 256 #ifdef SPD_opteed 257 bl_mem_params_node_t *pager_mem_params = NULL; 258 bl_mem_params_node_t *paged_mem_params = NULL; 259 #endif 260 assert(bl_mem_params); 261 262 switch (image_id) { 263 #ifdef AARCH64 264 case BL32_IMAGE_ID: 265 #ifdef SPD_opteed 266 pager_mem_params = get_bl_mem_params_node(BL32_EXTRA1_IMAGE_ID); 267 assert(pager_mem_params); 268 269 paged_mem_params = get_bl_mem_params_node(BL32_EXTRA2_IMAGE_ID); 270 assert(paged_mem_params); 271 272 err = parse_optee_header(&bl_mem_params->ep_info, 273 &pager_mem_params->image_info, 274 &paged_mem_params->image_info); 275 if (err != 0) { 276 WARN("OPTEE header parse error.\n"); 277 } 278 #endif 279 bl_mem_params->ep_info.spsr = arm_get_spsr_for_bl32_entry(); 280 break; 281 #endif 282 283 case BL33_IMAGE_ID: 284 /* BL33 expects to receive the primary CPU MPID (through r0) */ 285 bl_mem_params->ep_info.args.arg0 = 0xffff & read_mpidr(); 286 bl_mem_params->ep_info.spsr = arm_get_spsr_for_bl33_entry(); 287 break; 288 289 #ifdef SCP_BL2_BASE 290 case SCP_BL2_IMAGE_ID: 291 /* The subsequent handling of SCP_BL2 is platform specific */ 292 err = plat_arm_bl2_handle_scp_bl2(&bl_mem_params->image_info); 293 if (err) { 294 WARN("Failure in platform-specific handling of SCP_BL2 image.\n"); 295 } 296 break; 297 #endif 298 } 299 300 return err; 301 } 302 303 /******************************************************************************* 304 * This function can be used by the platforms to update/use image 305 * information for given `image_id`. 306 ******************************************************************************/ 307 int bl2_plat_handle_post_image_load(unsigned int image_id) 308 { 309 return arm_bl2_handle_post_image_load(image_id); 310 } 311 312 #else /* LOAD_IMAGE_V2 */ 313 314 /******************************************************************************* 315 * Populate the extents of memory available for loading SCP_BL2 (if used), 316 * i.e. anywhere in trusted RAM as long as it doesn't overwrite BL2. 317 ******************************************************************************/ 318 void bl2_plat_get_scp_bl2_meminfo(meminfo_t *scp_bl2_meminfo) 319 { 320 *scp_bl2_meminfo = bl2_tzram_layout; 321 } 322 323 /******************************************************************************* 324 * Before calling this function BL31 is loaded in memory and its entrypoint 325 * is set by load_image. This is a placeholder for the platform to change 326 * the entrypoint of BL31 and set SPSR and security state. 327 * On ARM standard platforms we only set the security state of the entrypoint 328 ******************************************************************************/ 329 void bl2_plat_set_bl31_ep_info(image_info_t *bl31_image_info, 330 entry_point_info_t *bl31_ep_info) 331 { 332 SET_SECURITY_STATE(bl31_ep_info->h.attr, SECURE); 333 bl31_ep_info->spsr = SPSR_64(MODE_EL3, MODE_SP_ELX, 334 DISABLE_ALL_EXCEPTIONS); 335 } 336 337 338 /******************************************************************************* 339 * Before calling this function BL32 is loaded in memory and its entrypoint 340 * is set by load_image. This is a placeholder for the platform to change 341 * the entrypoint of BL32 and set SPSR and security state. 342 * On ARM standard platforms we only set the security state of the entrypoint 343 ******************************************************************************/ 344 #ifdef BL32_BASE 345 void bl2_plat_set_bl32_ep_info(image_info_t *bl32_image_info, 346 entry_point_info_t *bl32_ep_info) 347 { 348 SET_SECURITY_STATE(bl32_ep_info->h.attr, SECURE); 349 bl32_ep_info->spsr = arm_get_spsr_for_bl32_entry(); 350 } 351 352 /******************************************************************************* 353 * Populate the extents of memory available for loading BL32 354 ******************************************************************************/ 355 void bl2_plat_get_bl32_meminfo(meminfo_t *bl32_meminfo) 356 { 357 /* 358 * Populate the extents of memory available for loading BL32. 359 */ 360 bl32_meminfo->total_base = BL32_BASE; 361 bl32_meminfo->free_base = BL32_BASE; 362 bl32_meminfo->total_size = 363 (TSP_SEC_MEM_BASE + TSP_SEC_MEM_SIZE) - BL32_BASE; 364 bl32_meminfo->free_size = 365 (TSP_SEC_MEM_BASE + TSP_SEC_MEM_SIZE) - BL32_BASE; 366 } 367 #endif /* BL32_BASE */ 368 369 /******************************************************************************* 370 * Before calling this function BL33 is loaded in memory and its entrypoint 371 * is set by load_image. This is a placeholder for the platform to change 372 * the entrypoint of BL33 and set SPSR and security state. 373 * On ARM standard platforms we only set the security state of the entrypoint 374 ******************************************************************************/ 375 void bl2_plat_set_bl33_ep_info(image_info_t *image, 376 entry_point_info_t *bl33_ep_info) 377 { 378 SET_SECURITY_STATE(bl33_ep_info->h.attr, NON_SECURE); 379 bl33_ep_info->spsr = arm_get_spsr_for_bl33_entry(); 380 } 381 382 /******************************************************************************* 383 * Populate the extents of memory available for loading BL33 384 ******************************************************************************/ 385 void bl2_plat_get_bl33_meminfo(meminfo_t *bl33_meminfo) 386 { 387 bl33_meminfo->total_base = ARM_NS_DRAM1_BASE; 388 bl33_meminfo->total_size = ARM_NS_DRAM1_SIZE; 389 bl33_meminfo->free_base = ARM_NS_DRAM1_BASE; 390 bl33_meminfo->free_size = ARM_NS_DRAM1_SIZE; 391 } 392 393 #endif /* LOAD_IMAGE_V2 */ 394