1 /*
2 * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <assert.h>
8 #include <errno.h>
9
10 #include <platform_def.h>
11
12 #include <arch_helpers.h>
13 #include <bl1/bl1.h>
14 #include <common/bl_common.h>
15 #include <common/debug.h>
16 #include <plat/common/platform.h>
17
18 /*
19 * The following platform functions are weakly defined. They
20 * are default implementations that allow BL1 to compile in
21 * absence of real definitions. The Platforms may override
22 * with more complex definitions.
23 */
24 #pragma weak bl1_plat_get_next_image_id
25 #pragma weak bl1_plat_set_ep_info
26 #pragma weak bl1_plat_get_image_desc
27 #pragma weak bl1_plat_fwu_done
28 #pragma weak bl1_plat_handle_pre_image_load
29 #pragma weak bl1_plat_handle_post_image_load
30 #if MEASURED_BOOT
31 #pragma weak bl1_plat_set_bl2_hash
32 #endif
33
bl1_plat_get_next_image_id(void)34 unsigned int bl1_plat_get_next_image_id(void)
35 {
36 /* BL2 load will be done by default. */
37 return BL2_IMAGE_ID;
38 }
39
bl1_plat_set_ep_info(unsigned int image_id,struct entry_point_info * ep_info)40 void bl1_plat_set_ep_info(unsigned int image_id,
41 struct entry_point_info *ep_info)
42 {
43
44 }
45
bl1_plat_handle_pre_image_load(unsigned int image_id)46 int bl1_plat_handle_pre_image_load(unsigned int image_id)
47 {
48 return 0;
49 }
50
51 /*
52 * Following is the default definition that always
53 * returns BL2 image details.
54 */
bl1_plat_get_image_desc(unsigned int image_id)55 struct image_desc *bl1_plat_get_image_desc(unsigned int image_id)
56 {
57 static image_desc_t bl2_img_desc = BL2_IMAGE_DESC;
58 return &bl2_img_desc;
59 }
60
bl1_plat_fwu_done(void * client_cookie,void * reserved)61 __dead2 void bl1_plat_fwu_done(void *client_cookie, void *reserved)
62 {
63 while (true)
64 wfi();
65 }
66
67 /*
68 * The Platforms must override with real definition.
69 */
70 #pragma weak bl1_plat_mem_check
71
bl1_plat_mem_check(uintptr_t mem_base,unsigned int mem_size,unsigned int flags)72 int bl1_plat_mem_check(uintptr_t mem_base, unsigned int mem_size,
73 unsigned int flags)
74 {
75 assert(0);
76 return -ENOMEM;
77 }
78
79 /*
80 * Default implementation for bl1_plat_handle_post_image_load(). This function
81 * populates the default arguments to BL2. The BL2 memory layout structure
82 * is allocated and the calculated layout is populated in arg1 to BL2.
83 */
bl1_plat_handle_post_image_load(unsigned int image_id)84 int bl1_plat_handle_post_image_load(unsigned int image_id)
85 {
86 meminfo_t *bl2_secram_layout;
87 meminfo_t *bl1_secram_layout;
88 image_desc_t *image_desc;
89 entry_point_info_t *ep_info;
90
91 if (image_id != BL2_IMAGE_ID)
92 return 0;
93
94 /* Get the image descriptor */
95 image_desc = bl1_plat_get_image_desc(BL2_IMAGE_ID);
96 assert(image_desc != NULL);
97
98 /* Get the entry point info */
99 ep_info = &image_desc->ep_info;
100
101 /* Find out how much free trusted ram remains after BL1 load */
102 bl1_secram_layout = bl1_plat_sec_mem_layout();
103
104 /*
105 * Create a new layout of memory for BL2 as seen by BL1 i.e.
106 * tell it the amount of total and free memory available.
107 * This layout is created at the first free address visible
108 * to BL2. BL2 will read the memory layout before using its
109 * memory for other purposes.
110 */
111 bl2_secram_layout = (meminfo_t *) bl1_secram_layout->total_base;
112
113 bl1_calc_bl2_mem_layout(bl1_secram_layout, bl2_secram_layout);
114
115 ep_info->args.arg1 = (uintptr_t)bl2_secram_layout;
116
117 VERBOSE("BL1: BL2 memory layout address = %p\n",
118 (void *) bl2_secram_layout);
119 return 0;
120 }
121
122 #if MEASURED_BOOT
123 /*
124 * Calculates and writes BL2 hash data to TB_FW_CONFIG DTB.
125 */
bl1_plat_set_bl2_hash(const image_desc_t * image_desc)126 void bl1_plat_set_bl2_hash(const image_desc_t *image_desc)
127 {
128 }
129 #endif
130