1 /*
2 * Copyright (c) 2015-2021, 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
bl1_plat_get_next_image_id(void)31 unsigned int bl1_plat_get_next_image_id(void)
32 {
33 /* BL2 load will be done by default. */
34 return BL2_IMAGE_ID;
35 }
36
bl1_plat_set_ep_info(unsigned int image_id,struct entry_point_info * ep_info)37 void bl1_plat_set_ep_info(unsigned int image_id,
38 struct entry_point_info *ep_info)
39 {
40
41 }
42
bl1_plat_handle_pre_image_load(unsigned int image_id)43 int bl1_plat_handle_pre_image_load(unsigned int image_id)
44 {
45 return 0;
46 }
47
48 /*
49 * Following is the default definition that always
50 * returns BL2 image details.
51 */
bl1_plat_get_image_desc(unsigned int image_id)52 struct image_desc *bl1_plat_get_image_desc(unsigned int image_id)
53 {
54 static image_desc_t bl2_img_desc = BL2_IMAGE_DESC;
55 return &bl2_img_desc;
56 }
57
bl1_plat_fwu_done(void * client_cookie,void * reserved)58 __dead2 void bl1_plat_fwu_done(void *client_cookie, void *reserved)
59 {
60 while (true)
61 wfi();
62 }
63
64 /*
65 * The Platforms must override with real definition.
66 */
67 #pragma weak bl1_plat_mem_check
68
bl1_plat_mem_check(uintptr_t mem_base,unsigned int mem_size,unsigned int flags)69 int bl1_plat_mem_check(uintptr_t mem_base, unsigned int mem_size,
70 unsigned int flags)
71 {
72 assert(0);
73 return -ENOMEM;
74 }
75
76 /*
77 * Default implementation for bl1_plat_handle_post_image_load(). This function
78 * populates the default arguments to BL2. The BL2 memory layout structure
79 * is allocated and the calculated layout is populated in arg1 to BL2.
80 */
bl1_plat_handle_post_image_load(unsigned int image_id)81 int bl1_plat_handle_post_image_load(unsigned int image_id)
82 {
83 meminfo_t *bl2_secram_layout;
84 meminfo_t *bl1_secram_layout;
85 image_desc_t *image_desc;
86 entry_point_info_t *ep_info;
87
88 if (image_id != BL2_IMAGE_ID)
89 return 0;
90
91 /* Get the image descriptor */
92 image_desc = bl1_plat_get_image_desc(BL2_IMAGE_ID);
93 assert(image_desc != NULL);
94
95 /* Get the entry point info */
96 ep_info = &image_desc->ep_info;
97
98 /* Find out how much free trusted ram remains after BL1 load */
99 bl1_secram_layout = bl1_plat_sec_mem_layout();
100
101 /*
102 * Create a new layout of memory for BL2 as seen by BL1 i.e.
103 * tell it the amount of total and free memory available.
104 * This layout is created at the first free address visible
105 * to BL2. BL2 will read the memory layout before using its
106 * memory for other purposes.
107 */
108 bl2_secram_layout = (meminfo_t *) bl1_secram_layout->total_base;
109
110 bl1_calc_bl2_mem_layout(bl1_secram_layout, bl2_secram_layout);
111
112 ep_info->args.arg1 = (uintptr_t)bl2_secram_layout;
113
114 VERBOSE("BL1: BL2 memory layout address = %p\n",
115 (void *) bl2_secram_layout);
116 return 0;
117 }
118