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Achin Gupta4f6ad662013-10-25 09:08:21 +01001/*
Antonio Nino Diaze3962d02017-02-16 16:17:19 +00002 * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
Achin Gupta4f6ad662013-10-25 09:08:21 +01003 *
dp-armfa3cf0b2017-05-03 09:38:09 +01004 * SPDX-License-Identifier: BSD-3-Clause
Achin Gupta4f6ad662013-10-25 09:08:21 +01005 */
6
Achin Gupta4f6ad662013-10-25 09:08:21 +01007#include <arch_helpers.h>
Juan Castilloa08a5e72015-05-19 11:54:12 +01008#include <auth_mod.h>
Yatharth Kochar71c9a5e2015-10-10 19:06:53 +01009#include <bl1.h>
Achin Gupta4f6ad662013-10-25 09:08:21 +010010#include <bl_common.h>
Antonio Nino Diaze3962d02017-02-16 16:17:19 +000011#include <console.h>
Dan Handley714a0d22014-04-09 13:13:04 +010012#include <debug.h>
Dan Handley2bd4ef22014-04-09 13:14:54 +010013#include <platform.h>
Dan Handleybcd60ba2014-04-17 18:53:42 +010014#include "bl2_private.h"
Achin Gupta4f6ad662013-10-25 09:08:21 +010015
Roberto Vargase0e99462017-10-30 14:43:43 +000016#ifdef AARCH32
17#define NEXT_IMAGE "BL32"
18#else
19#define NEXT_IMAGE "BL31"
20#endif
Vikram Kanigirida567432014-04-15 18:08:08 +010021
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010022/*******************************************************************************
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010023 * The only thing to do in BL2 is to load further images and pass control to
Yatharth Kochar51f76f62016-09-12 16:10:33 +010024 * next BL. The memory occupied by BL2 will be reclaimed by BL3x stages. BL2
25 * runs entirely in S-EL1.
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010026 ******************************************************************************/
27void bl2_main(void)
28{
Yatharth Kochar51f76f62016-09-12 16:10:33 +010029 entry_point_info_t *next_bl_ep_info;
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010030
Dan Handley91b624e2014-07-29 17:14:00 +010031 NOTICE("BL2: %s\n", version_string);
32 NOTICE("BL2: %s\n", build_message);
33
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010034 /* Perform remaining generic architectural setup in S-EL1 */
35 bl2_arch_setup();
36
Juan Castillo9246ab82015-01-28 16:46:57 +000037#if TRUSTED_BOARD_BOOT
38 /* Initialize authentication module */
Juan Castilloa08a5e72015-05-19 11:54:12 +010039 auth_mod_init();
Juan Castillo9246ab82015-01-28 16:46:57 +000040#endif /* TRUSTED_BOARD_BOOT */
41
Roberto Vargasbc1ae1f2017-09-26 12:53:01 +010042 /* initialize boot source */
43 bl2_plat_preload_setup();
44
Yatharth Kochar51f76f62016-09-12 16:10:33 +010045 /* Load the subsequent bootloader images. */
46 next_bl_ep_info = bl2_load_images();
Andrew Thoelkea55566d2014-05-28 22:22:55 +010047
Yatharth Kochardafb2472016-06-30 14:52:12 +010048#ifdef AARCH32
49 /*
50 * For AArch32 state BL1 and BL2 share the MMU setup.
51 * Given that BL2 does not map BL1 regions, MMU needs
52 * to be disabled in order to go back to BL1.
53 */
54 disable_mmu_icache_secure();
55#endif /* AARCH32 */
56
Roberto Vargase0e99462017-10-30 14:43:43 +000057
58#if !BL2_AT_EL3
Antonio Nino Diaze3962d02017-02-16 16:17:19 +000059 console_flush();
60
Achin Gupta4f6ad662013-10-25 09:08:21 +010061 /*
Yatharth Kochar51f76f62016-09-12 16:10:33 +010062 * Run next BL image via an SMC to BL1. Information on how to pass
63 * control to the BL32 (if present) and BL33 software images will
64 * be passed to next BL image as an argument.
Achin Gupta4f6ad662013-10-25 09:08:21 +010065 */
Yatharth Kochar51f76f62016-09-12 16:10:33 +010066 smc(BL1_SMC_RUN_IMAGE, (unsigned long)next_bl_ep_info, 0, 0, 0, 0, 0, 0);
Roberto Vargase0e99462017-10-30 14:43:43 +000067#else
68 NOTICE("BL2: Booting " NEXT_IMAGE "\n");
69 print_entry_point_info(next_bl_ep_info);
70 console_flush();
71
72 bl2_run_next_image(next_bl_ep_info);
73#endif
Achin Gupta4f6ad662013-10-25 09:08:21 +010074}