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 <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
31
bl1_plat_get_next_image_id(void)32 unsigned int bl1_plat_get_next_image_id(void)
33 {
34 /* BL2 load will be done by default. */
35 return BL2_IMAGE_ID;
36 }
37
bl1_plat_set_ep_info(unsigned int image_id,struct entry_point_info * ep_info)38 void bl1_plat_set_ep_info(unsigned int image_id,
39 struct entry_point_info *ep_info)
40 {
41
42 }
43
bl1_plat_handle_pre_image_load(unsigned int image_id)44 int bl1_plat_handle_pre_image_load(unsigned int image_id)
45 {
46 return 0;
47 }
48
49 /*
50 * Following is the default definition that always
51 * returns BL2 image details.
52 */
bl1_plat_get_image_desc(unsigned int image_id)53 struct image_desc *bl1_plat_get_image_desc(unsigned int image_id)
54 {
55 static image_desc_t bl2_img_desc = BL2_IMAGE_DESC;
56 return &bl2_img_desc;
57 }
58
bl1_plat_fwu_done(void * client_cookie,void * reserved)59 __dead2 void bl1_plat_fwu_done(void *client_cookie, void *reserved)
60 {
61 while (1)
62 wfi();
63 }
64
65 /*
66 * The Platforms must override with real definition.
67 */
68 #pragma weak bl1_plat_mem_check
69
bl1_plat_mem_check(uintptr_t mem_base,unsigned int mem_size,unsigned int flags)70 int bl1_plat_mem_check(uintptr_t mem_base, unsigned int mem_size,
71 unsigned int flags)
72 {
73 assert(0);
74 return -ENOMEM;
75 }
76
77 /*
78 * Default implementation for bl1_plat_handle_post_image_load(). This function
79 * populates the default arguments to BL2. The BL2 memory layout structure
80 * is allocated and the calculated layout is populated in arg1 to BL2.
81 */
bl1_plat_handle_post_image_load(unsigned int image_id)82 int bl1_plat_handle_post_image_load(unsigned int image_id)
83 {
84 meminfo_t *bl2_tzram_layout;
85 meminfo_t *bl1_tzram_layout;
86 image_desc_t *image_desc;
87 entry_point_info_t *ep_info;
88
89 if (image_id != BL2_IMAGE_ID)
90 return 0;
91
92 /* Get the image descriptor */
93 image_desc = bl1_plat_get_image_desc(BL2_IMAGE_ID);
94 assert(image_desc != NULL);
95
96 /* Get the entry point info */
97 ep_info = &image_desc->ep_info;
98
99 /* Find out how much free trusted ram remains after BL1 load */
100 bl1_tzram_layout = bl1_plat_sec_mem_layout();
101
102 /*
103 * Create a new layout of memory for BL2 as seen by BL1 i.e.
104 * tell it the amount of total and free memory available.
105 * This layout is created at the first free address visible
106 * to BL2. BL2 will read the memory layout before using its
107 * memory for other purposes.
108 */
109 bl2_tzram_layout = (meminfo_t *) bl1_tzram_layout->total_base;
110
111 bl1_calc_bl2_mem_layout(bl1_tzram_layout, bl2_tzram_layout);
112
113 ep_info->args.arg1 = (uintptr_t)bl2_tzram_layout;
114
115 VERBOSE("BL1: BL2 memory layout address = %p\n",
116 (void *) bl2_tzram_layout);
117 return 0;
118 }
119