1 /* 2 * Copyright (c) 2015-2022, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 9 #include <platform_def.h> 10 11 #include <arch.h> 12 #include <bl1/bl1.h> 13 #include <common/bl_common.h> 14 #include <common/debug.h> 15 #include <lib/fconf/fconf.h> 16 #include <lib/fconf/fconf_dyn_cfg_getter.h> 17 #include <lib/utils.h> 18 #include <lib/xlat_tables/xlat_tables_compat.h> 19 #include <plat/arm/common/plat_arm.h> 20 #include <plat/common/platform.h> 21 22 /* Weak definitions may be overridden in specific ARM standard platform */ 23 #pragma weak bl1_early_platform_setup 24 #pragma weak bl1_plat_arch_setup 25 #pragma weak bl1_plat_sec_mem_layout 26 #pragma weak arm_bl1_early_platform_setup 27 #pragma weak bl1_plat_prepare_exit 28 #pragma weak bl1_plat_get_next_image_id 29 #pragma weak plat_arm_bl1_fwu_needed 30 #pragma weak arm_bl1_plat_arch_setup 31 #pragma weak arm_bl1_platform_setup 32 33 #define MAP_BL1_TOTAL MAP_REGION_FLAT( \ 34 bl1_tzram_layout.total_base, \ 35 bl1_tzram_layout.total_size, \ 36 MT_MEMORY | MT_RW | EL3_PAS) 37 /* 38 * If SEPARATE_CODE_AND_RODATA=1 we define a region for each section 39 * otherwise one region is defined containing both 40 */ 41 #if SEPARATE_CODE_AND_RODATA 42 #define MAP_BL1_RO MAP_REGION_FLAT( \ 43 BL_CODE_BASE, \ 44 BL1_CODE_END - BL_CODE_BASE, \ 45 MT_CODE | EL3_PAS), \ 46 MAP_REGION_FLAT( \ 47 BL1_RO_DATA_BASE, \ 48 BL1_RO_DATA_END \ 49 - BL_RO_DATA_BASE, \ 50 MT_RO_DATA | EL3_PAS) 51 #else 52 #define MAP_BL1_RO MAP_REGION_FLAT( \ 53 BL_CODE_BASE, \ 54 BL1_CODE_END - BL_CODE_BASE, \ 55 MT_CODE | EL3_PAS) 56 #endif 57 58 /* Data structure which holds the extents of the trusted SRAM for BL1*/ 59 static meminfo_t bl1_tzram_layout; 60 61 /* Boolean variable to hold condition whether firmware update needed or not */ 62 static bool is_fwu_needed; 63 64 struct meminfo *bl1_plat_sec_mem_layout(void) 65 { 66 return &bl1_tzram_layout; 67 } 68 69 /******************************************************************************* 70 * BL1 specific platform actions shared between ARM standard platforms. 71 ******************************************************************************/ 72 void arm_bl1_early_platform_setup(void) 73 { 74 75 #if !ARM_DISABLE_TRUSTED_WDOG 76 /* Enable watchdog */ 77 plat_arm_secure_wdt_start(); 78 #endif 79 80 /* Initialize the console to provide early debug support */ 81 arm_console_boot_init(); 82 83 /* Allow BL1 to see the whole Trusted RAM */ 84 bl1_tzram_layout.total_base = ARM_BL_RAM_BASE; 85 bl1_tzram_layout.total_size = ARM_BL_RAM_SIZE; 86 } 87 88 void bl1_early_platform_setup(void) 89 { 90 arm_bl1_early_platform_setup(); 91 92 /* 93 * Initialize Interconnect for this cluster during cold boot. 94 * No need for locks as no other CPU is active. 95 */ 96 plat_arm_interconnect_init(); 97 /* 98 * Enable Interconnect coherency for the primary CPU's cluster. 99 */ 100 plat_arm_interconnect_enter_coherency(); 101 } 102 103 /****************************************************************************** 104 * Perform the very early platform specific architecture setup shared between 105 * ARM standard platforms. This only does basic initialization. Later 106 * architectural setup (bl1_arch_setup()) does not do anything platform 107 * specific. 108 *****************************************************************************/ 109 void arm_bl1_plat_arch_setup(void) 110 { 111 #if USE_COHERENT_MEM 112 /* Ensure ARM platforms don't use coherent memory in BL1. */ 113 assert((BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE) == 0U); 114 #endif 115 116 const mmap_region_t bl_regions[] = { 117 MAP_BL1_TOTAL, 118 MAP_BL1_RO, 119 #if USE_ROMLIB 120 ARM_MAP_ROMLIB_CODE, 121 ARM_MAP_ROMLIB_DATA, 122 #endif 123 {0} 124 }; 125 126 setup_page_tables(bl_regions, plat_arm_get_mmap()); 127 #ifdef __aarch64__ 128 enable_mmu_el3(0); 129 #else 130 enable_mmu_svc_mon(0); 131 #endif /* __aarch64__ */ 132 133 arm_setup_romlib(); 134 } 135 136 void bl1_plat_arch_setup(void) 137 { 138 arm_bl1_plat_arch_setup(); 139 } 140 141 /* 142 * Perform the platform specific architecture setup shared between 143 * ARM standard platforms. 144 */ 145 void arm_bl1_platform_setup(void) 146 { 147 const struct dyn_cfg_dtb_info_t *fw_config_info; 148 image_desc_t *desc; 149 uint32_t fw_config_max_size; 150 int err = -1; 151 152 /* Initialise the IO layer and register platform IO devices */ 153 plat_arm_io_setup(); 154 155 /* Check if we need FWU before further processing */ 156 is_fwu_needed = plat_arm_bl1_fwu_needed(); 157 if (is_fwu_needed) { 158 ERROR("Skip platform setup as FWU detected\n"); 159 return; 160 } 161 162 /* Set global DTB info for fixed fw_config information */ 163 fw_config_max_size = ARM_FW_CONFIG_LIMIT - ARM_FW_CONFIG_BASE; 164 set_config_info(ARM_FW_CONFIG_BASE, ~0UL, fw_config_max_size, FW_CONFIG_ID); 165 166 /* Fill the device tree information struct with the info from the config dtb */ 167 err = fconf_load_config(FW_CONFIG_ID); 168 if (err < 0) { 169 ERROR("Loading of FW_CONFIG failed %d\n", err); 170 plat_error_handler(err); 171 } 172 173 /* 174 * FW_CONFIG loaded successfully. If FW_CONFIG device tree parsing 175 * is successful then load TB_FW_CONFIG device tree. 176 */ 177 fw_config_info = FCONF_GET_PROPERTY(dyn_cfg, dtb, FW_CONFIG_ID); 178 if (fw_config_info != NULL) { 179 err = fconf_populate_dtb_registry(fw_config_info->config_addr); 180 if (err < 0) { 181 ERROR("Parsing of FW_CONFIG failed %d\n", err); 182 plat_error_handler(err); 183 } 184 /* load TB_FW_CONFIG */ 185 err = fconf_load_config(TB_FW_CONFIG_ID); 186 if (err < 0) { 187 ERROR("Loading of TB_FW_CONFIG failed %d\n", err); 188 plat_error_handler(err); 189 } 190 } else { 191 ERROR("Invalid FW_CONFIG address\n"); 192 plat_error_handler(err); 193 } 194 195 /* The BL2 ep_info arg0 is modified to point to FW_CONFIG */ 196 desc = bl1_plat_get_image_desc(BL2_IMAGE_ID); 197 assert(desc != NULL); 198 desc->ep_info.args.arg0 = fw_config_info->config_addr; 199 200 #if CRYPTO_SUPPORT 201 /* Share the Mbed TLS heap info with other images */ 202 arm_bl1_set_mbedtls_heap(); 203 #endif /* CRYPTO_SUPPORT */ 204 205 /* 206 * Allow access to the System counter timer module and program 207 * counter frequency for non secure images during FWU 208 */ 209 #ifdef ARM_SYS_TIMCTL_BASE 210 arm_configure_sys_timer(); 211 #endif 212 #if (ARM_ARCH_MAJOR > 7) || defined(ARMV7_SUPPORTS_GENERIC_TIMER) 213 write_cntfrq_el0(plat_get_syscnt_freq2()); 214 #endif 215 } 216 217 void bl1_plat_prepare_exit(entry_point_info_t *ep_info) 218 { 219 #if !ARM_DISABLE_TRUSTED_WDOG 220 /* Disable watchdog before leaving BL1 */ 221 plat_arm_secure_wdt_stop(); 222 #endif 223 224 #ifdef EL3_PAYLOAD_BASE 225 /* 226 * Program the EL3 payload's entry point address into the CPUs mailbox 227 * in order to release secondary CPUs from their holding pen and make 228 * them jump there. 229 */ 230 plat_arm_program_trusted_mailbox(ep_info->pc); 231 dsbsy(); 232 sev(); 233 #endif 234 } 235 236 /* 237 * On Arm platforms, the FWU process is triggered when the FIP image has 238 * been tampered with. 239 */ 240 bool plat_arm_bl1_fwu_needed(void) 241 { 242 return !arm_io_is_toc_valid(); 243 } 244 245 /******************************************************************************* 246 * The following function checks if Firmware update is needed, 247 * by checking if TOC in FIP image is valid or not. 248 ******************************************************************************/ 249 unsigned int bl1_plat_get_next_image_id(void) 250 { 251 return is_fwu_needed ? NS_BL1U_IMAGE_ID : BL2_IMAGE_ID; 252 } 253