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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
Vikram Kanigirida567432014-04-15 18:08:08 +010016
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010017/*******************************************************************************
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010018 * The only thing to do in BL2 is to load further images and pass control to
Yatharth Kochar51f76f62016-09-12 16:10:33 +010019 * next BL. The memory occupied by BL2 will be reclaimed by BL3x stages. BL2
20 * runs entirely in S-EL1.
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010021 ******************************************************************************/
22void bl2_main(void)
23{
Yatharth Kochar51f76f62016-09-12 16:10:33 +010024 entry_point_info_t *next_bl_ep_info;
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010025
Dan Handley91b624e2014-07-29 17:14:00 +010026 NOTICE("BL2: %s\n", version_string);
27 NOTICE("BL2: %s\n", build_message);
28
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010029 /* Perform remaining generic architectural setup in S-EL1 */
30 bl2_arch_setup();
31
Juan Castillo9246ab82015-01-28 16:46:57 +000032#if TRUSTED_BOARD_BOOT
33 /* Initialize authentication module */
Juan Castilloa08a5e72015-05-19 11:54:12 +010034 auth_mod_init();
Juan Castillo9246ab82015-01-28 16:46:57 +000035#endif /* TRUSTED_BOARD_BOOT */
36
Yatharth Kochar51f76f62016-09-12 16:10:33 +010037 /* Load the subsequent bootloader images. */
38 next_bl_ep_info = bl2_load_images();
Andrew Thoelkea55566d2014-05-28 22:22:55 +010039
Yatharth Kochardafb2472016-06-30 14:52:12 +010040#ifdef AARCH32
41 /*
42 * For AArch32 state BL1 and BL2 share the MMU setup.
43 * Given that BL2 does not map BL1 regions, MMU needs
44 * to be disabled in order to go back to BL1.
45 */
46 disable_mmu_icache_secure();
47#endif /* AARCH32 */
48
Antonio Nino Diaze3962d02017-02-16 16:17:19 +000049 console_flush();
50
Achin Gupta4f6ad662013-10-25 09:08:21 +010051 /*
Yatharth Kochar51f76f62016-09-12 16:10:33 +010052 * Run next BL image via an SMC to BL1. Information on how to pass
53 * control to the BL32 (if present) and BL33 software images will
54 * be passed to next BL image as an argument.
Achin Gupta4f6ad662013-10-25 09:08:21 +010055 */
Yatharth Kochar51f76f62016-09-12 16:10:33 +010056 smc(BL1_SMC_RUN_IMAGE, (unsigned long)next_bl_ep_info, 0, 0, 0, 0, 0, 0);
Achin Gupta4f6ad662013-10-25 09:08:21 +010057}