1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*
* Copyright (c) 2018-2020, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <arch_helpers.h>
#include <common/bl_common.h>
#include <common/debug.h>
#include <lib/xlat_tables/xlat_tables_compat.h>
#include <plat/common/platform.h>
#include <services/arm_arch_svc.h>
#include <smccc_helpers.h>
#include <tools_share/firmware_encrypted.h>
/*
* The following platform functions are weakly defined. The Platforms
* may redefine with strong definition.
*/
#pragma weak bl2_el3_plat_prepare_exit
#pragma weak plat_error_handler
#pragma weak bl2_plat_preload_setup
#pragma weak bl2_plat_handle_pre_image_load
#pragma weak bl2_plat_handle_post_image_load
#pragma weak plat_try_next_boot_source
#pragma weak plat_get_enc_key_info
#pragma weak plat_is_smccc_feature_available
#pragma weak plat_get_soc_version
#pragma weak plat_get_soc_revision
int32_t plat_get_soc_version(void)
{
return SMC_ARCH_CALL_NOT_SUPPORTED;
}
int32_t plat_get_soc_revision(void)
{
return SMC_ARCH_CALL_NOT_SUPPORTED;
}
int32_t plat_is_smccc_feature_available(u_register_t fid __unused)
{
return SMC_ARCH_CALL_NOT_SUPPORTED;
}
void bl2_el3_plat_prepare_exit(void)
{
}
void __dead2 plat_error_handler(int err)
{
while (1)
wfi();
}
void bl2_plat_preload_setup(void)
{
}
int bl2_plat_handle_pre_image_load(unsigned int image_id)
{
return 0;
}
int bl2_plat_handle_post_image_load(unsigned int image_id)
{
return 0;
}
int plat_try_next_boot_source(void)
{
return 0;
}
/*
* Weak implementation to provide dummy decryption key only for test purposes,
* platforms must override this API for any real world firmware encryption
* use-case.
*/
int plat_get_enc_key_info(enum fw_enc_status_t fw_enc_status, uint8_t *key,
size_t *key_len, unsigned int *flags,
const uint8_t *img_id, size_t img_id_len)
{
#define DUMMY_FIP_ENC_KEY { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \
0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \
0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \
0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef }
const uint8_t dummy_key[] = DUMMY_FIP_ENC_KEY;
assert(*key_len >= sizeof(dummy_key));
*key_len = sizeof(dummy_key);
memcpy(key, dummy_key, *key_len);
*flags = 0;
return 0;
}
/*
* Set up the page tables for the generic and platform-specific memory regions.
* The size of the Trusted SRAM seen by the BL image must be specified as well
* as an array specifying the generic memory regions which can be;
* - Code section;
* - Read-only data section;
* - Init code section, if applicable
* - Coherent memory region, if applicable.
*/
void __init setup_page_tables(const mmap_region_t *bl_regions,
const mmap_region_t *plat_regions)
{
#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
const mmap_region_t *regions = bl_regions;
while (regions->size != 0U) {
VERBOSE("Region: 0x%lx - 0x%lx has attributes 0x%x\n",
regions->base_va,
regions->base_va + regions->size,
regions->attr);
regions++;
}
#endif
/*
* Map the Trusted SRAM with appropriate memory attributes.
* Subsequent mappings will adjust the attributes for specific regions.
*/
mmap_add(bl_regions);
/* Now (re-)map the platform-specific memory regions */
mmap_add(plat_regions);
/* Create the page tables to reflect the above mappings */
init_xlat_tables();
}
|
