1 /* 2 * Copyright (c) 2015-2021, 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/generic_delay_timer.h> 17 #include <drivers/partition/partition.h> 18 #include <lib/fconf/fconf.h> 19 #include <lib/fconf/fconf_dyn_cfg_getter.h> 20 #ifdef SPD_opteed 21 #include <lib/optee_utils.h> 22 #endif 23 #include <lib/utils.h> 24 #include <plat/arm/common/plat_arm.h> 25 #include <plat/common/platform.h> 26 27 /* Data structure which holds the extents of the trusted SRAM for BL2 */ 28 static meminfo_t bl2_tzram_layout __aligned(CACHE_WRITEBACK_GRANULE); 29 30 /* Base address of fw_config received from BL1 */ 31 static uintptr_t config_base; 32 33 /* 34 * Check that BL2_BASE is above ARM_FW_CONFIG_LIMIT. This reserved page is 35 * for `meminfo_t` data structure and fw_configs passed from BL1. 36 */ 37 CASSERT(BL2_BASE >= ARM_FW_CONFIG_LIMIT, assert_bl2_base_overflows); 38 39 /* Weak definitions may be overridden in specific ARM standard platform */ 40 #pragma weak bl2_early_platform_setup2 41 #pragma weak bl2_platform_setup 42 #pragma weak bl2_plat_arch_setup 43 #pragma weak bl2_plat_sec_mem_layout 44 #if MEASURED_BOOT 45 #pragma weak bl2_plat_get_hash 46 #endif 47 48 #define MAP_BL2_TOTAL MAP_REGION_FLAT( \ 49 bl2_tzram_layout.total_base, \ 50 bl2_tzram_layout.total_size, \ 51 MT_MEMORY | MT_RW | MT_SECURE) 52 53 54 #pragma weak arm_bl2_plat_handle_post_image_load 55 56 /******************************************************************************* 57 * BL1 has passed the extents of the trusted SRAM that should be visible to BL2 58 * in x0. This memory layout is sitting at the base of the free trusted SRAM. 59 * Copy it to a safe location before its reclaimed by later BL2 functionality. 60 ******************************************************************************/ 61 void arm_bl2_early_platform_setup(uintptr_t fw_config, 62 struct meminfo *mem_layout) 63 { 64 /* Initialize the console to provide early debug support */ 65 arm_console_boot_init(); 66 67 /* Setup the BL2 memory layout */ 68 bl2_tzram_layout = *mem_layout; 69 70 config_base = fw_config; 71 72 /* Initialise the IO layer and register platform IO devices */ 73 plat_arm_io_setup(); 74 75 /* Load partition table */ 76 #if ARM_GPT_SUPPORT 77 partition_init(GPT_IMAGE_ID); 78 #endif /* ARM_GPT_SUPPORT */ 79 80 } 81 82 void bl2_early_platform_setup2(u_register_t arg0, u_register_t arg1, u_register_t arg2, u_register_t arg3) 83 { 84 arm_bl2_early_platform_setup((uintptr_t)arg0, (meminfo_t *)arg1); 85 86 generic_delay_timer_init(); 87 } 88 89 /* 90 * Perform BL2 preload setup. Currently we initialise the dynamic 91 * configuration here. 92 */ 93 void bl2_plat_preload_setup(void) 94 { 95 arm_bl2_dyn_cfg_init(); 96 97 #if ARM_GPT_SUPPORT 98 int result = arm_set_image_source(FIP_IMAGE_ID, "FIP_A"); 99 100 if (result != 0) { 101 panic(); 102 } 103 #endif /* ARM_GPT_SUPPORT */ 104 } 105 106 /* 107 * Perform ARM standard platform setup. 108 */ 109 void arm_bl2_platform_setup(void) 110 { 111 /* Initialize the secure environment */ 112 plat_arm_security_setup(); 113 114 #if defined(PLAT_ARM_MEM_PROT_ADDR) 115 arm_nor_psci_do_static_mem_protect(); 116 #endif 117 } 118 119 void bl2_platform_setup(void) 120 { 121 arm_bl2_platform_setup(); 122 } 123 124 /******************************************************************************* 125 * Perform the very early platform specific architectural setup here. At the 126 * moment this is only initializes the mmu in a quick and dirty way. 127 ******************************************************************************/ 128 void arm_bl2_plat_arch_setup(void) 129 { 130 #if USE_COHERENT_MEM && !ARM_CRYPTOCELL_INTEG 131 /* 132 * Ensure ARM platforms don't use coherent memory in BL2 unless 133 * cryptocell integration is enabled. 134 */ 135 assert((BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE) == 0U); 136 #endif 137 138 const mmap_region_t bl_regions[] = { 139 MAP_BL2_TOTAL, 140 ARM_MAP_BL_RO, 141 #if USE_ROMLIB 142 ARM_MAP_ROMLIB_CODE, 143 ARM_MAP_ROMLIB_DATA, 144 #endif 145 #if ARM_CRYPTOCELL_INTEG 146 ARM_MAP_BL_COHERENT_RAM, 147 #endif 148 ARM_MAP_BL_CONFIG_REGION, 149 {0} 150 }; 151 152 setup_page_tables(bl_regions, plat_arm_get_mmap()); 153 154 #ifdef __aarch64__ 155 enable_mmu_el1(0); 156 #else 157 enable_mmu_svc_mon(0); 158 #endif 159 160 arm_setup_romlib(); 161 } 162 163 void bl2_plat_arch_setup(void) 164 { 165 const struct dyn_cfg_dtb_info_t *tb_fw_config_info; 166 167 arm_bl2_plat_arch_setup(); 168 169 /* Fill the properties struct with the info from the config dtb */ 170 fconf_populate("FW_CONFIG", config_base); 171 172 /* TB_FW_CONFIG was also loaded by BL1 */ 173 tb_fw_config_info = FCONF_GET_PROPERTY(dyn_cfg, dtb, TB_FW_CONFIG_ID); 174 assert(tb_fw_config_info != NULL); 175 176 fconf_populate("TB_FW", tb_fw_config_info->config_addr); 177 } 178 179 int arm_bl2_handle_post_image_load(unsigned int image_id) 180 { 181 int err = 0; 182 bl_mem_params_node_t *bl_mem_params = get_bl_mem_params_node(image_id); 183 #ifdef SPD_opteed 184 bl_mem_params_node_t *pager_mem_params = NULL; 185 bl_mem_params_node_t *paged_mem_params = NULL; 186 #endif 187 assert(bl_mem_params != NULL); 188 189 switch (image_id) { 190 #ifdef __aarch64__ 191 case BL32_IMAGE_ID: 192 #ifdef SPD_opteed 193 pager_mem_params = get_bl_mem_params_node(BL32_EXTRA1_IMAGE_ID); 194 assert(pager_mem_params); 195 196 paged_mem_params = get_bl_mem_params_node(BL32_EXTRA2_IMAGE_ID); 197 assert(paged_mem_params); 198 199 err = parse_optee_header(&bl_mem_params->ep_info, 200 &pager_mem_params->image_info, 201 &paged_mem_params->image_info); 202 if (err != 0) { 203 WARN("OPTEE header parse error.\n"); 204 } 205 #endif 206 bl_mem_params->ep_info.spsr = arm_get_spsr_for_bl32_entry(); 207 break; 208 #endif 209 210 case BL33_IMAGE_ID: 211 /* BL33 expects to receive the primary CPU MPID (through r0) */ 212 bl_mem_params->ep_info.args.arg0 = 0xffff & read_mpidr(); 213 bl_mem_params->ep_info.spsr = arm_get_spsr_for_bl33_entry(); 214 break; 215 216 #ifdef SCP_BL2_BASE 217 case SCP_BL2_IMAGE_ID: 218 /* The subsequent handling of SCP_BL2 is platform specific */ 219 err = plat_arm_bl2_handle_scp_bl2(&bl_mem_params->image_info); 220 if (err) { 221 WARN("Failure in platform-specific handling of SCP_BL2 image.\n"); 222 } 223 break; 224 #endif 225 default: 226 /* Do nothing in default case */ 227 break; 228 } 229 230 return err; 231 } 232 233 /******************************************************************************* 234 * This function can be used by the platforms to update/use image 235 * information for given `image_id`. 236 ******************************************************************************/ 237 int arm_bl2_plat_handle_post_image_load(unsigned int image_id) 238 { 239 #if defined(SPD_spmd) && SPMD_SPM_AT_SEL2 240 /* For Secure Partitions we don't need post processing */ 241 if ((image_id >= (MAX_NUMBER_IDS - MAX_SP_IDS)) && 242 (image_id < MAX_NUMBER_IDS)) { 243 return 0; 244 } 245 #endif 246 return arm_bl2_handle_post_image_load(image_id); 247 } 248 249 int bl2_plat_handle_post_image_load(unsigned int image_id) 250 { 251 return arm_bl2_plat_handle_post_image_load(image_id); 252 } 253 254 #if MEASURED_BOOT 255 /* Read TCG_DIGEST_SIZE bytes of BL2 hash data */ 256 void bl2_plat_get_hash(void *data) 257 { 258 arm_bl2_get_hash(data); 259 } 260 #endif 261