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 <bl_common.h> 35 #include <debug.h> 36 #include <platform.h> 37 #include <platform_def.h> 38 #include <stdio.h> 39 #include "bl2_private.h" 40 41 /******************************************************************************* 42 * Load the BL3-0 image if there's one. 43 * If a platform does not want to attempt to load BL3-0 image it must leave 44 * BL30_BASE undefined. 45 * Return 0 on success or if there's no BL3-0 image to load, a negative error 46 * code otherwise. 47 ******************************************************************************/ 48 static int load_bl30(void) 49 { 50 int e = 0; 51 #ifdef BL30_BASE 52 meminfo_t bl30_mem_info; 53 image_info_t bl30_image_info; 54 55 /* 56 * It is up to the platform to specify where BL3-0 should be loaded if 57 * it exists. It could create space in the secure sram or point to a 58 * completely different memory. 59 * 60 * The entry point information is not relevant in this case as the AP 61 * won't execute the BL3-0 image. 62 */ 63 bl2_plat_get_bl30_meminfo(&bl30_mem_info); 64 e = load_image(&bl30_mem_info, 65 BL30_IMAGE_NAME, 66 BL30_BASE, 67 &bl30_image_info, 68 NULL); 69 70 if (e == 0) { 71 /* The subsequent handling of BL3-0 is platform specific */ 72 bl2_plat_handle_bl30(&bl30_image_info); 73 } 74 #endif /* BL30_BASE */ 75 76 return e; 77 } 78 79 /******************************************************************************* 80 * Load the BL3-1 image. 81 * The bl2_to_bl31_params and bl31_ep_info params will be updated with the 82 * relevant BL3-1 information. 83 * Return 0 on success, a negative error code otherwise. 84 ******************************************************************************/ 85 static int load_bl31(bl31_params_t *bl2_to_bl31_params, 86 entry_point_info_t *bl31_ep_info) 87 { 88 meminfo_t *bl2_tzram_layout; 89 int e; 90 91 assert(bl2_to_bl31_params != NULL); 92 assert(bl31_ep_info != NULL); 93 94 /* Find out how much free trusted ram remains after BL2 load */ 95 bl2_tzram_layout = bl2_plat_sec_mem_layout(); 96 97 /* Set the X0 parameter to BL3-1 */ 98 bl31_ep_info->args.arg0 = (unsigned long)bl2_to_bl31_params; 99 100 /* Load the BL3-1 image */ 101 e = load_image(bl2_tzram_layout, 102 BL31_IMAGE_NAME, 103 BL31_BASE, 104 bl2_to_bl31_params->bl31_image_info, 105 bl31_ep_info); 106 107 if (e == 0) 108 bl2_plat_set_bl31_ep_info(bl2_to_bl31_params->bl31_image_info, 109 bl31_ep_info); 110 111 return e; 112 } 113 114 /******************************************************************************* 115 * Load the BL3-2 image if there's one. 116 * The bl2_to_bl31_params param will be updated with the relevant BL3-2 117 * information. 118 * If a platform does not want to attempt to load BL3-2 image it must leave 119 * BL32_BASE undefined. 120 * Return 0 on success or if there's no BL3-2 image to load, a negative error 121 * code otherwise. 122 ******************************************************************************/ 123 static int load_bl32(bl31_params_t *bl2_to_bl31_params) 124 { 125 int e = 0; 126 #ifdef BL32_BASE 127 meminfo_t bl32_mem_info; 128 129 assert(bl2_to_bl31_params != NULL); 130 131 /* 132 * It is up to the platform to specify where BL3-2 should be loaded if 133 * it exists. It could create space in the secure sram or point to a 134 * completely different memory. 135 */ 136 bl2_plat_get_bl32_meminfo(&bl32_mem_info); 137 e = load_image(&bl32_mem_info, 138 BL32_IMAGE_NAME, 139 BL32_BASE, 140 bl2_to_bl31_params->bl32_image_info, 141 bl2_to_bl31_params->bl32_ep_info); 142 143 if (e == 0) { 144 bl2_plat_set_bl32_ep_info( 145 bl2_to_bl31_params->bl32_image_info, 146 bl2_to_bl31_params->bl32_ep_info); 147 } 148 #endif /* BL32_BASE */ 149 150 return e; 151 } 152 153 /******************************************************************************* 154 * Load the BL3-3 image. 155 * The bl2_to_bl31_params param will be updated with the relevant BL3-3 156 * information. 157 * Return 0 on success, a negative error code otherwise. 158 ******************************************************************************/ 159 static int load_bl33(bl31_params_t *bl2_to_bl31_params) 160 { 161 meminfo_t bl33_mem_info; 162 int e; 163 164 assert(bl2_to_bl31_params != NULL); 165 166 bl2_plat_get_bl33_meminfo(&bl33_mem_info); 167 168 /* Load the BL3-3 image in non-secure memory provided by the platform */ 169 e = load_image(&bl33_mem_info, 170 BL33_IMAGE_NAME, 171 plat_get_ns_image_entrypoint(), 172 bl2_to_bl31_params->bl33_image_info, 173 bl2_to_bl31_params->bl33_ep_info); 174 175 if (e == 0) 176 bl2_plat_set_bl33_ep_info(bl2_to_bl31_params->bl33_image_info, 177 bl2_to_bl31_params->bl33_ep_info); 178 179 return e; 180 } 181 182 /******************************************************************************* 183 * The only thing to do in BL2 is to load further images and pass control to 184 * BL3-1. The memory occupied by BL2 will be reclaimed by BL3-x stages. BL2 runs 185 * entirely in S-EL1. 186 ******************************************************************************/ 187 void bl2_main(void) 188 { 189 bl31_params_t *bl2_to_bl31_params; 190 entry_point_info_t *bl31_ep_info; 191 int e; 192 193 /* Perform remaining generic architectural setup in S-EL1 */ 194 bl2_arch_setup(); 195 196 /* Perform platform setup in BL2 */ 197 bl2_platform_setup(); 198 199 printf("BL2 %s\n\r", build_message); 200 201 /* 202 * Load the subsequent bootloader images 203 */ 204 e = load_bl30(); 205 if (e) { 206 ERROR("Failed to load BL3-0 (%i)\n", e); 207 panic(); 208 } 209 210 /* 211 * Get a pointer to the memory the platform has set aside to pass 212 * information to BL3-1. 213 */ 214 bl2_to_bl31_params = bl2_plat_get_bl31_params(); 215 bl31_ep_info = bl2_plat_get_bl31_ep_info(); 216 217 e = load_bl31(bl2_to_bl31_params, bl31_ep_info); 218 if (e) { 219 ERROR("Failed to load BL3-1 (%i)\n", e); 220 panic(); 221 } 222 223 e = load_bl32(bl2_to_bl31_params); 224 if (e) 225 WARN("Failed to load BL3-2 (%i)\n", e); 226 227 e = load_bl33(bl2_to_bl31_params); 228 if (e) { 229 ERROR("Failed to load BL3-3 (%i)\n", e); 230 panic(); 231 } 232 233 /* Flush the params to be passed to memory */ 234 bl2_plat_flush_bl31_params(); 235 236 /* 237 * Run BL3-1 via an SMC to BL1. Information on how to pass control to 238 * the BL3-2 (if present) and BL3-3 software images will be passed to 239 * BL3-1 as an argument. 240 */ 241 smc(RUN_IMAGE, (unsigned long)bl31_ep_info, 0, 0, 0, 0, 0, 0); 242 } 243