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