1 /* 2 * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arch_helpers.h> 8 #include <assert.h> 9 #include <bl_common.h> 10 #include <bl1.h> 11 #include <debug.h> 12 #include <errno.h> 13 #include <platform.h> 14 #include <platform_def.h> 15 16 /* 17 * The following platform functions are weakly defined. They 18 * are default implementations that allow BL1 to compile in 19 * absence of real definitions. The Platforms may override 20 * with more complex definitions. 21 */ 22 #pragma weak bl1_plat_get_next_image_id 23 #pragma weak bl1_plat_set_ep_info 24 #pragma weak bl1_plat_get_image_desc 25 #pragma weak bl1_plat_fwu_done 26 #pragma weak bl1_plat_handle_pre_image_load 27 #pragma weak bl1_plat_handle_post_image_load 28 29 30 unsigned int bl1_plat_get_next_image_id(void) 31 { 32 /* BL2 load will be done by default. */ 33 return BL2_IMAGE_ID; 34 } 35 36 void bl1_plat_set_ep_info(unsigned int image_id, 37 struct entry_point_info *ep_info) 38 { 39 40 } 41 42 int bl1_plat_handle_pre_image_load(unsigned int image_id) 43 { 44 return 0; 45 } 46 47 /* 48 * Following is the default definition that always 49 * returns BL2 image details. 50 */ 51 struct image_desc *bl1_plat_get_image_desc(unsigned int image_id) 52 { 53 static image_desc_t bl2_img_desc = BL2_IMAGE_DESC; 54 return &bl2_img_desc; 55 } 56 57 __dead2 void bl1_plat_fwu_done(void *client_cookie, void *reserved) 58 { 59 while (1) 60 wfi(); 61 } 62 63 /* 64 * The Platforms must override with real definition. 65 */ 66 #pragma weak bl1_plat_mem_check 67 68 int bl1_plat_mem_check(uintptr_t mem_base, unsigned int mem_size, 69 unsigned int flags) 70 { 71 assert(0); 72 return -ENOMEM; 73 } 74 75 /* 76 * Default implementation for bl1_plat_handle_post_image_load(). This function 77 * populates the default arguments to BL2. The BL2 memory layout structure 78 * is allocated and the calculated layout is populated in arg1 to BL2. 79 */ 80 int bl1_plat_handle_post_image_load(unsigned int image_id) 81 { 82 meminfo_t *bl2_tzram_layout; 83 meminfo_t *bl1_tzram_layout; 84 image_desc_t *image_desc; 85 entry_point_info_t *ep_info; 86 87 if (image_id != BL2_IMAGE_ID) 88 return 0; 89 90 /* Get the image descriptor */ 91 image_desc = bl1_plat_get_image_desc(BL2_IMAGE_ID); 92 assert(image_desc != NULL); 93 94 /* Get the entry point info */ 95 ep_info = &image_desc->ep_info; 96 97 /* Find out how much free trusted ram remains after BL1 load */ 98 bl1_tzram_layout = bl1_plat_sec_mem_layout(); 99 100 /* 101 * Create a new layout of memory for BL2 as seen by BL1 i.e. 102 * tell it the amount of total and free memory available. 103 * This layout is created at the first free address visible 104 * to BL2. BL2 will read the memory layout before using its 105 * memory for other purposes. 106 */ 107 bl2_tzram_layout = (meminfo_t *) bl1_tzram_layout->total_base; 108 109 bl1_calc_bl2_mem_layout(bl1_tzram_layout, bl2_tzram_layout); 110 111 ep_info->args.arg1 = (uintptr_t)bl2_tzram_layout; 112 113 VERBOSE("BL1: BL2 memory layout address = %p\n", 114 (void *) bl2_tzram_layout); 115 return 0; 116 } 117