1 /* 2 * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 #include <stdint.h> 9 10 #include <platform_def.h> 11 12 #include <arch.h> 13 #include <arch_helpers.h> 14 #include <common/bl_common.h> 15 #include <common/debug.h> 16 #include <common/desc_image_load.h> 17 #include <drivers/auth/auth_mod.h> 18 #include <plat/common/platform.h> 19 20 #include "bl2_private.h" 21 22 /******************************************************************************* 23 * This function loads SCP_BL2/BL3x images and returns the ep_info for 24 * the next executable image. 25 ******************************************************************************/ 26 struct entry_point_info *bl2_load_images(void) 27 { 28 bl_params_t *bl2_to_next_bl_params; 29 bl_load_info_t *bl2_load_info; 30 const bl_load_info_node_t *bl2_node_info; 31 int plat_setup_done = 0; 32 int err; 33 34 /* 35 * Get information about the images to load. 36 */ 37 bl2_load_info = plat_get_bl_image_load_info(); 38 assert(bl2_load_info); 39 assert(bl2_load_info->head); 40 assert(bl2_load_info->h.type == PARAM_BL_LOAD_INFO); 41 assert(bl2_load_info->h.version >= VERSION_2); 42 bl2_node_info = bl2_load_info->head; 43 44 while (bl2_node_info) { 45 /* 46 * Perform platform setup before loading the image, 47 * if indicated in the image attributes AND if NOT 48 * already done before. 49 */ 50 if (bl2_node_info->image_info->h.attr & IMAGE_ATTRIB_PLAT_SETUP) { 51 if (plat_setup_done) { 52 WARN("BL2: Platform setup already done!!\n"); 53 } else { 54 INFO("BL2: Doing platform setup\n"); 55 bl2_platform_setup(); 56 plat_setup_done = 1; 57 } 58 } 59 60 err = bl2_plat_handle_pre_image_load(bl2_node_info->image_id); 61 if (err) { 62 ERROR("BL2: Failure in pre image load handling (%i)\n", err); 63 plat_error_handler(err); 64 } 65 66 if (!(bl2_node_info->image_info->h.attr & IMAGE_ATTRIB_SKIP_LOADING)) { 67 INFO("BL2: Loading image id %d\n", bl2_node_info->image_id); 68 err = load_auth_image(bl2_node_info->image_id, 69 bl2_node_info->image_info); 70 if (err) { 71 ERROR("BL2: Failed to load image id %d (%i)\n", 72 bl2_node_info->image_id, err); 73 plat_error_handler(err); 74 } 75 } else { 76 INFO("BL2: Skip loading image id %d\n", bl2_node_info->image_id); 77 } 78 79 /* Allow platform to handle image information. */ 80 err = bl2_plat_handle_post_image_load(bl2_node_info->image_id); 81 if (err) { 82 ERROR("BL2: Failure in post image load handling (%i)\n", err); 83 plat_error_handler(err); 84 } 85 86 /* Go to next image */ 87 bl2_node_info = bl2_node_info->next_load_info; 88 } 89 90 /* 91 * Get information to pass to the next image. 92 */ 93 bl2_to_next_bl_params = plat_get_next_bl_params(); 94 assert(bl2_to_next_bl_params); 95 assert(bl2_to_next_bl_params->head); 96 assert(bl2_to_next_bl_params->h.type == PARAM_BL_PARAMS); 97 assert(bl2_to_next_bl_params->h.version >= VERSION_2); 98 assert(bl2_to_next_bl_params->head->ep_info); 99 100 /* Populate arg0 for the next BL image if not already provided */ 101 if (bl2_to_next_bl_params->head->ep_info->args.arg0 == (u_register_t)0) 102 bl2_to_next_bl_params->head->ep_info->args.arg0 = 103 (u_register_t)bl2_to_next_bl_params; 104 105 /* Flush the parameters to be passed to next image */ 106 plat_flush_next_bl_params(); 107 108 return bl2_to_next_bl_params->head->ep_info; 109 } 110