1 /* 2 * Copyright (c) 2016-2020, 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 ******************************************************************************/ bl2_load_images(void)26struct 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 != NULL); 39 assert(bl2_load_info->head != NULL); 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 != NULL) { 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 & 51 IMAGE_ATTRIB_PLAT_SETUP) != 0U) { 52 if (plat_setup_done != 0) { 53 WARN("BL2: Platform setup already done!!\n"); 54 } else { 55 INFO("BL2: Doing platform setup\n"); 56 bl2_platform_setup(); 57 plat_setup_done = 1; 58 } 59 } 60 61 err = bl2_plat_handle_pre_image_load(bl2_node_info->image_id); 62 if (err != 0) { 63 ERROR("BL2: Failure in pre image load handling (%i)\n", err); 64 plat_error_handler(err); 65 } 66 67 if ((bl2_node_info->image_info->h.attr & 68 IMAGE_ATTRIB_SKIP_LOADING) == 0U) { 69 INFO("BL2: Loading image id %d\n", bl2_node_info->image_id); 70 err = load_auth_image(bl2_node_info->image_id, 71 bl2_node_info->image_info); 72 if (err != 0) { 73 ERROR("BL2: Failed to load image id %d (%i)\n", 74 bl2_node_info->image_id, err); 75 plat_error_handler(err); 76 } 77 } else { 78 INFO("BL2: Skip loading image id %d\n", bl2_node_info->image_id); 79 } 80 81 /* Allow platform to handle image information. */ 82 err = bl2_plat_handle_post_image_load(bl2_node_info->image_id); 83 if (err != 0) { 84 ERROR("BL2: Failure in post image load handling (%i)\n", err); 85 plat_error_handler(err); 86 } 87 88 /* Go to next image */ 89 bl2_node_info = bl2_node_info->next_load_info; 90 } 91 92 /* 93 * Get information to pass to the next image. 94 */ 95 bl2_to_next_bl_params = plat_get_next_bl_params(); 96 assert(bl2_to_next_bl_params != NULL); 97 assert(bl2_to_next_bl_params->head != NULL); 98 assert(bl2_to_next_bl_params->h.type == PARAM_BL_PARAMS); 99 assert(bl2_to_next_bl_params->h.version >= VERSION_2); 100 assert(bl2_to_next_bl_params->head->ep_info != NULL); 101 102 /* Populate arg0 for the next BL image if not already provided */ 103 if (bl2_to_next_bl_params->head->ep_info->args.arg0 == (u_register_t)0) 104 bl2_to_next_bl_params->head->ep_info->args.arg0 = 105 (u_register_t)bl2_to_next_bl_params; 106 107 /* Flush the parameters to be passed to next image */ 108 plat_flush_next_bl_params(); 109 110 return bl2_to_next_bl_params->head->ep_info; 111 } 112