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