1 /* 2 * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <arch.h> 32 #include <arch_helpers.h> 33 #include <assert.h> 34 #include <auth_mod.h> 35 #include <bl_common.h> 36 #include <debug.h> 37 #include <errno.h> 38 #include <platform.h> 39 #include <platform_def.h> 40 #include <stdint.h> 41 #include "bl2_private.h" 42 43 /******************************************************************************* 44 * Load the BL3-0 image if there's one. 45 * If a platform does not want to attempt to load BL3-0 image it must leave 46 * BL30_BASE undefined. 47 * Return 0 on success or if there's no BL3-0 image to load, a negative error 48 * code otherwise. 49 ******************************************************************************/ 50 static int load_bl30(void) 51 { 52 int e = 0; 53 #ifdef BL30_BASE 54 meminfo_t bl30_mem_info; 55 image_info_t bl30_image_info; 56 57 /* 58 * It is up to the platform to specify where BL3-0 should be loaded if 59 * it exists. It could create space in the secure sram or point to a 60 * completely different memory. 61 * 62 * The entry point information is not relevant in this case as the AP 63 * won't execute the BL3-0 image. 64 */ 65 INFO("BL2: Loading BL3-0\n"); 66 bl2_plat_get_bl30_meminfo(&bl30_mem_info); 67 bl30_image_info.h.version = VERSION_1; 68 e = load_auth_image(&bl30_mem_info, 69 BL30_IMAGE_ID, 70 BL30_BASE, 71 &bl30_image_info, 72 NULL); 73 74 if (e == 0) { 75 /* The subsequent handling of BL3-0 is platform specific */ 76 e = bl2_plat_handle_bl30(&bl30_image_info); 77 if (e) { 78 ERROR("Failure in platform-specific handling of BL3-0 image.\n"); 79 } 80 } 81 #endif /* BL30_BASE */ 82 83 return e; 84 } 85 86 /******************************************************************************* 87 * Load the BL3-1 image. 88 * The bl2_to_bl31_params and bl31_ep_info params will be updated with the 89 * relevant BL3-1 information. 90 * Return 0 on success, a negative error code otherwise. 91 ******************************************************************************/ 92 static int load_bl31(bl31_params_t *bl2_to_bl31_params, 93 entry_point_info_t *bl31_ep_info) 94 { 95 meminfo_t *bl2_tzram_layout; 96 int e; 97 98 INFO("BL2: Loading BL3-1\n"); 99 assert(bl2_to_bl31_params != NULL); 100 assert(bl31_ep_info != NULL); 101 102 /* Find out how much free trusted ram remains after BL2 load */ 103 bl2_tzram_layout = bl2_plat_sec_mem_layout(); 104 105 /* Set the X0 parameter to BL3-1 */ 106 bl31_ep_info->args.arg0 = (unsigned long)bl2_to_bl31_params; 107 108 /* Load the BL3-1 image */ 109 e = load_auth_image(bl2_tzram_layout, 110 BL31_IMAGE_ID, 111 BL31_BASE, 112 bl2_to_bl31_params->bl31_image_info, 113 bl31_ep_info); 114 115 if (e == 0) { 116 bl2_plat_set_bl31_ep_info(bl2_to_bl31_params->bl31_image_info, 117 bl31_ep_info); 118 } 119 120 return e; 121 } 122 123 /******************************************************************************* 124 * Load the BL3-2 image if there's one. 125 * The bl2_to_bl31_params param will be updated with the relevant BL3-2 126 * information. 127 * If a platform does not want to attempt to load BL3-2 image it must leave 128 * BL32_BASE undefined. 129 * Return 0 on success or if there's no BL3-2 image to load, a negative error 130 * code otherwise. 131 ******************************************************************************/ 132 static int load_bl32(bl31_params_t *bl2_to_bl31_params) 133 { 134 int e = 0; 135 #ifdef BL32_BASE 136 meminfo_t bl32_mem_info; 137 138 INFO("BL2: Loading BL3-2\n"); 139 assert(bl2_to_bl31_params != NULL); 140 141 /* 142 * It is up to the platform to specify where BL3-2 should be loaded if 143 * it exists. It could create space in the secure sram or point to a 144 * completely different memory. 145 */ 146 bl2_plat_get_bl32_meminfo(&bl32_mem_info); 147 e = load_auth_image(&bl32_mem_info, 148 BL32_IMAGE_ID, 149 BL32_BASE, 150 bl2_to_bl31_params->bl32_image_info, 151 bl2_to_bl31_params->bl32_ep_info); 152 153 if (e == 0) { 154 bl2_plat_set_bl32_ep_info( 155 bl2_to_bl31_params->bl32_image_info, 156 bl2_to_bl31_params->bl32_ep_info); 157 } 158 #endif /* BL32_BASE */ 159 160 return e; 161 } 162 163 /******************************************************************************* 164 * Load the BL3-3 image. 165 * The bl2_to_bl31_params param will be updated with the relevant BL3-3 166 * information. 167 * Return 0 on success, a negative error code otherwise. 168 ******************************************************************************/ 169 static int load_bl33(bl31_params_t *bl2_to_bl31_params) 170 { 171 meminfo_t bl33_mem_info; 172 int e; 173 174 INFO("BL2: Loading BL3-3\n"); 175 assert(bl2_to_bl31_params != NULL); 176 177 bl2_plat_get_bl33_meminfo(&bl33_mem_info); 178 179 /* Load the BL3-3 image in non-secure memory provided by the platform */ 180 e = load_auth_image(&bl33_mem_info, 181 BL33_IMAGE_ID, 182 plat_get_ns_image_entrypoint(), 183 bl2_to_bl31_params->bl33_image_info, 184 bl2_to_bl31_params->bl33_ep_info); 185 186 if (e == 0) { 187 bl2_plat_set_bl33_ep_info(bl2_to_bl31_params->bl33_image_info, 188 bl2_to_bl31_params->bl33_ep_info); 189 } 190 191 return e; 192 } 193 194 /******************************************************************************* 195 * The only thing to do in BL2 is to load further images and pass control to 196 * BL3-1. The memory occupied by BL2 will be reclaimed by BL3-x stages. BL2 runs 197 * entirely in S-EL1. 198 ******************************************************************************/ 199 void bl2_main(void) 200 { 201 bl31_params_t *bl2_to_bl31_params; 202 entry_point_info_t *bl31_ep_info; 203 int e; 204 205 NOTICE("BL2: %s\n", version_string); 206 NOTICE("BL2: %s\n", build_message); 207 208 /* Perform remaining generic architectural setup in S-EL1 */ 209 bl2_arch_setup(); 210 211 #if TRUSTED_BOARD_BOOT 212 /* Initialize authentication module */ 213 auth_mod_init(); 214 #endif /* TRUSTED_BOARD_BOOT */ 215 216 /* 217 * Load the subsequent bootloader images 218 */ 219 e = load_bl30(); 220 if (e) { 221 ERROR("Failed to load BL3-0 (%i)\n", e); 222 panic(); 223 } 224 225 /* Perform platform setup in BL2 after loading BL3-0 */ 226 bl2_platform_setup(); 227 228 /* 229 * Get a pointer to the memory the platform has set aside to pass 230 * information to BL3-1. 231 */ 232 bl2_to_bl31_params = bl2_plat_get_bl31_params(); 233 bl31_ep_info = bl2_plat_get_bl31_ep_info(); 234 235 e = load_bl31(bl2_to_bl31_params, bl31_ep_info); 236 if (e) { 237 ERROR("Failed to load BL3-1 (%i)\n", e); 238 panic(); 239 } 240 241 e = load_bl32(bl2_to_bl31_params); 242 if (e) { 243 if (e == -EAUTH) { 244 ERROR("Failed to authenticate BL3-2\n"); 245 panic(); 246 } else { 247 WARN("Failed to load BL3-2 (%i)\n", e); 248 } 249 } 250 251 e = load_bl33(bl2_to_bl31_params); 252 if (e) { 253 ERROR("Failed to load BL3-3 (%i)\n", e); 254 panic(); 255 } 256 257 /* Flush the params to be passed to memory */ 258 bl2_plat_flush_bl31_params(); 259 260 /* 261 * Run BL3-1 via an SMC to BL1. Information on how to pass control to 262 * the BL3-2 (if present) and BL3-3 software images will be passed to 263 * BL3-1 as an argument. 264 */ 265 smc(RUN_IMAGE, (unsigned long)bl31_ep_info, 0, 0, 0, 0, 0, 0); 266 } 267