bl2/bl2_image_load_v2.c

   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 (%i)\n", err);
  72                                 plat_error_handler(err);
  73                         }
  74                 } else {
  75                         INFO("BL2: Skip loading image id %d\n", bl2_node_info->image_id);
  76                 }
  77
  78                 /* Allow platform to handle image information. */
  79                 err = bl2_plat_handle_post_image_load(bl2_node_info->image_id);
  80                 if (err) {
  81                         ERROR("BL2: Failure in post image load handling (%i)\n", err);
  82                         plat_error_handler(err);
  83                 }
  84
  85                 /* Go to next image */
  86                 bl2_node_info = bl2_node_info->next_load_info;
  87         }
  88
  89         /*
  90          * Get information to pass to the next image.
  91          */
  92         bl2_to_next_bl_params = plat_get_next_bl_params();
  93         assert(bl2_to_next_bl_params);
  94         assert(bl2_to_next_bl_params->head);
  95         assert(bl2_to_next_bl_params->h.type == PARAM_BL_PARAMS);
  96         assert(bl2_to_next_bl_params->h.version >= VERSION_2);
  97         assert(bl2_to_next_bl_params->head->ep_info);
  98
  99         /* Populate arg0 for the next BL image if not already provided */
 100         if (bl2_to_next_bl_params->head->ep_info->args.arg0 == (u_register_t)0)
 101                 bl2_to_next_bl_params->head->ep_info->args.arg0 =
 102                                         (u_register_t)bl2_to_next_bl_params;
 103
 104         /* Flush the parameters to be passed to next image */
 105         plat_flush_next_bl_params();
 106
 107         return bl2_to_next_bl_params->head->ep_info;
 108 }