1 /*
2 * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <arch_helpers.h>
8 #include <auth_mod.h>
9 #include <bl1.h>
10 #include <bl_common.h>
11 #include <console.h>
12 #include <debug.h>
13 #include <platform.h>
14 #include "bl2_private.h"
15
16
17 /*******************************************************************************
18 * The only thing to do in BL2 is to load further images and pass control to
19 * next BL. The memory occupied by BL2 will be reclaimed by BL3x stages. BL2
20 * runs entirely in S-EL1.
21 ******************************************************************************/
bl2_main(void)22 void bl2_main(void)
23 {
24 entry_point_info_t *next_bl_ep_info;
25
26 NOTICE("BL2: %s\n", version_string);
27 NOTICE("BL2: %s\n", build_message);
28
29 /* Perform remaining generic architectural setup in S-EL1 */
30 bl2_arch_setup();
31
32 #if TRUSTED_BOARD_BOOT
33 /* Initialize authentication module */
34 auth_mod_init();
35 #endif /* TRUSTED_BOARD_BOOT */
36
37 /* initialize boot source */
38 bl2_plat_preload_setup();
39
40 /* Load the subsequent bootloader images. */
41 next_bl_ep_info = bl2_load_images();
42
43 #ifdef AARCH32
44 /*
45 * For AArch32 state BL1 and BL2 share the MMU setup.
46 * Given that BL2 does not map BL1 regions, MMU needs
47 * to be disabled in order to go back to BL1.
48 */
49 disable_mmu_icache_secure();
50 #endif /* AARCH32 */
51
52 console_flush();
53
54 /*
55 * Run next BL image via an SMC to BL1. Information on how to pass
56 * control to the BL32 (if present) and BL33 software images will
57 * be passed to next BL image as an argument.
58 */
59 smc(BL1_SMC_RUN_IMAGE, (unsigned long)next_bl_ep_info, 0, 0, 0, 0, 0, 0);
60 }
61