1 /* 2 * Copyright (c) 2016-2022, 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 <arch.h> 11 #include <arch_helpers.h> 12 #include "bl2_private.h" 13 #include <common/bl_common.h> 14 #include <common/debug.h> 15 #include <common/desc_image_load.h> 16 #include <drivers/auth/auth_mod.h> 17 #include <plat/common/platform.h> 18 19 #include <platform_def.h> 20 21 /******************************************************************************* 22 * This function loads SCP_BL2/BL3x images and returns the ep_info for 23 * the next executable image. 24 ******************************************************************************/ bl2_load_images(void)25struct entry_point_info *bl2_load_images(void) 26 { 27 bl_params_t *bl2_to_next_bl_params; 28 bl_load_info_t *bl2_load_info; 29 const bl_load_info_node_t *bl2_node_info; 30 int plat_setup_done = 0; 31 int err; 32 33 /* 34 * Get information about the images to load. 35 */ 36 bl2_load_info = plat_get_bl_image_load_info(); 37 assert(bl2_load_info != NULL); 38 assert(bl2_load_info->head != NULL); 39 assert(bl2_load_info->h.type == PARAM_BL_LOAD_INFO); 40 assert(bl2_load_info->h.version >= VERSION_2); 41 bl2_node_info = bl2_load_info->head; 42 43 while (bl2_node_info != NULL) { 44 /* 45 * Perform platform setup before loading the image, 46 * if indicated in the image attributes AND if NOT 47 * already done before. 48 */ 49 if ((bl2_node_info->image_info->h.attr & 50 IMAGE_ATTRIB_PLAT_SETUP) != 0U) { 51 if (plat_setup_done != 0) { 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 != 0) { 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 & 67 IMAGE_ATTRIB_SKIP_LOADING) == 0U) { 68 INFO("BL2: Loading image id %u\n", bl2_node_info->image_id); 69 err = load_auth_image(bl2_node_info->image_id, 70 bl2_node_info->image_info); 71 if (err != 0) { 72 ERROR("BL2: Failed to load image id %u (%i)\n", 73 bl2_node_info->image_id, err); 74 plat_error_handler(err); 75 } 76 } else { 77 INFO("BL2: Skip loading image id %u\n", bl2_node_info->image_id); 78 } 79 80 /* Allow platform to handle image information. */ 81 err = bl2_plat_handle_post_image_load(bl2_node_info->image_id); 82 if (err != 0) { 83 ERROR("BL2: Failure in post image load handling (%i)\n", err); 84 plat_error_handler(err); 85 } 86 87 /* Go to next image */ 88 bl2_node_info = bl2_node_info->next_load_info; 89 } 90 91 /* 92 * Get information to pass to the next image. 93 */ 94 bl2_to_next_bl_params = plat_get_next_bl_params(); 95 assert(bl2_to_next_bl_params != NULL); 96 assert(bl2_to_next_bl_params->head != NULL); 97 assert(bl2_to_next_bl_params->h.type == PARAM_BL_PARAMS); 98 assert(bl2_to_next_bl_params->h.version >= VERSION_2); 99 assert(bl2_to_next_bl_params->head->ep_info != NULL); 100 101 /* Populate arg0 for the next BL image if not already provided */ 102 if (bl2_to_next_bl_params->head->ep_info->args.arg0 == (u_register_t)0) 103 bl2_to_next_bl_params->head->ep_info->args.arg0 = 104 (u_register_t)bl2_to_next_bl_params; 105 106 /* Flush the parameters to be passed to next image */ 107 plat_flush_next_bl_params(); 108 109 return bl2_to_next_bl_params->head->ep_info; 110 } 111