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
|
/*
* Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <stdint.h>
#include <platform_def.h>
#include <arch.h>
#include <arch_helpers.h>
#include <bl1/bl1.h>
#include <bl2u/bl2u.h>
#include <common/bl_common.h>
#include <common/debug.h>
#include <drivers/auth/auth_mod.h>
#include <drivers/console.h>
#include <plat/common/platform.h>
/*******************************************************************************
* This function is responsible to:
* Load SCP_BL2U if platform has defined SCP_BL2U_BASE
* Perform platform setup.
* Go back to EL3.
******************************************************************************/
void bl2u_main(void)
{
NOTICE("BL2U: %s\n", version_string);
NOTICE("BL2U: %s\n", build_message);
#if SCP_BL2U_BASE
int rc;
/* Load the subsequent bootloader images */
rc = bl2u_plat_handle_scp_bl2u();
if (rc != 0) {
ERROR("Failed to load SCP_BL2U (%i)\n", rc);
panic();
}
#endif
/* Perform platform setup in BL2U after loading SCP_BL2U */
bl2u_platform_setup();
console_flush();
#ifndef __aarch64__
/*
* For AArch32 state BL1 and BL2U share the MMU setup.
* Given that BL2U does not map BL1 regions, MMU needs
* to be disabled in order to go back to BL1.
*/
disable_mmu_icache_secure();
#endif /* !__aarch64__ */
/*
* Indicate that BL2U is done and resume back to
* normal world via an SMC to BL1.
* x1 could be passed to Normal world,
* so DO NOT pass any secret information.
*/
smc(FWU_SMC_SEC_IMAGE_DONE, 0, 0, 0, 0, 0, 0, 0);
wfi();
}
|
