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 /******************************************************************************* 43 * The only thing to do in BL2 is to load further images and pass control to 44 * BL3-1. The memory occupied by BL2 will be reclaimed by BL3-x stages. BL2 runs 45 * entirely in S-EL1. 46 ******************************************************************************/ 47 void bl2_main(void) 48 { 49 meminfo_t *bl2_tzram_layout; 50 bl31_params_t *bl2_to_bl31_params; 51 entry_point_info_t *bl31_ep_info; 52 meminfo_t bl32_mem_info; 53 meminfo_t bl33_mem_info; 54 int e; 55 56 /* Perform remaining generic architectural setup in S-El1 */ 57 bl2_arch_setup(); 58 59 /* Perform platform setup in BL1 */ 60 bl2_platform_setup(); 61 62 printf("BL2 %s\n\r", build_message); 63 64 /* Find out how much free trusted ram remains after BL2 load */ 65 bl2_tzram_layout = bl2_plat_sec_mem_layout(); 66 67 /* 68 * Get a pointer to the memory the platform has set aside to pass 69 * information to BL31. 70 */ 71 bl2_to_bl31_params = bl2_plat_get_bl31_params(); 72 bl31_ep_info = bl2_plat_get_bl31_ep_info(); 73 74 /* Set the X0 parameter to bl31 */ 75 bl31_ep_info->args.arg0 = (unsigned long)bl2_to_bl31_params; 76 77 /* Load the BL3-1 image */ 78 e = load_image(bl2_tzram_layout, 79 BL31_IMAGE_NAME, 80 BL31_BASE, 81 bl2_to_bl31_params->bl31_image_info, 82 bl31_ep_info); 83 84 /* Assert if it has not been possible to load BL31 */ 85 if (e) { 86 ERROR("Failed to load BL3-1.\n"); 87 panic(); 88 } 89 90 bl2_plat_set_bl31_ep_info(bl2_to_bl31_params->bl31_image_info, 91 bl31_ep_info); 92 93 bl2_plat_get_bl33_meminfo(&bl33_mem_info); 94 95 /* Load the BL33 image in non-secure memory provided by the platform */ 96 e = load_image(&bl33_mem_info, 97 BL33_IMAGE_NAME, 98 plat_get_ns_image_entrypoint(), 99 bl2_to_bl31_params->bl33_image_info, 100 bl2_to_bl31_params->bl33_ep_info); 101 102 /* Halt if failed to load normal world firmware. */ 103 if (e) { 104 ERROR("Failed to load BL3-3.\n"); 105 panic(); 106 } 107 bl2_plat_set_bl33_ep_info(bl2_to_bl31_params->bl33_image_info, 108 bl2_to_bl31_params->bl33_ep_info); 109 110 111 #ifdef BL32_BASE 112 /* 113 * Load the BL32 image if there's one. It is upto to platform 114 * to specify where BL32 should be loaded if it exists. It 115 * could create space in the secure sram or point to a 116 * completely different memory. 117 * 118 * If a platform does not want to attempt to load BL3-2 image 119 * it must leave BL32_BASE undefined 120 */ 121 bl2_plat_get_bl32_meminfo(&bl32_mem_info); 122 e = load_image(&bl32_mem_info, 123 BL32_IMAGE_NAME, 124 BL32_BASE, 125 bl2_to_bl31_params->bl32_image_info, 126 bl2_to_bl31_params->bl32_ep_info); 127 128 /* Issue a diagnostic if no Secure Payload could be loaded */ 129 if (e) { 130 WARN("Failed to load BL3-2.\n"); 131 } else { 132 bl2_plat_set_bl32_ep_info( 133 bl2_to_bl31_params->bl32_image_info, 134 bl2_to_bl31_params->bl32_ep_info); 135 } 136 #endif /* BL32_BASE */ 137 138 /* Flush the params to be passed to memory */ 139 bl2_plat_flush_bl31_params(); 140 141 /* 142 * Run BL31 via an SMC to BL1. Information on how to pass control to 143 * the BL32 (if present) and BL33 software images will be passed to 144 * BL31 as an argument. 145 */ 146 smc(RUN_IMAGE, (unsigned long)bl31_ep_info, 0, 0, 0, 0, 0, 0); 147 } 148