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Achin Gupta4f6ad662013-10-25 09:08:21 +01001/*
Antonio Nino Diaz6e4b0832019-01-31 10:48:47 +00002 * Copyright (c) 2013-2019, 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>
Antonio Nino Diaze0f90632018-12-14 00:18:21 +00008#include <bl1/bl1.h>
9#include <bl2/bl2.h>
10#include <common/bl_common.h>
11#include <common/debug.h>
12#include <drivers/auth/auth_mod.h>
13#include <drivers/console.h>
14#include <plat/common/platform.h>
15
Dan Handleybcd60ba2014-04-17 18:53:42 +010016#include "bl2_private.h"
Achin Gupta4f6ad662013-10-25 09:08:21 +010017
Roberto Vargase0e99462017-10-30 14:43:43 +000018#ifdef AARCH32
19#define NEXT_IMAGE "BL32"
20#else
21#define NEXT_IMAGE "BL31"
22#endif
Vikram Kanigirida567432014-04-15 18:08:08 +010023
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010024/*******************************************************************************
Antonio Nino Diaz6e4b0832019-01-31 10:48:47 +000025 * Setup function for BL2.
26 ******************************************************************************/
27void bl2_setup(u_register_t arg0, u_register_t arg1, u_register_t arg2,
28 u_register_t arg3)
29{
30 /* Perform early platform-specific setup */
31 bl2_early_platform_setup2(arg0, arg1, arg2, arg3);
32
33#ifdef AARCH64
34 /*
35 * Update pointer authentication key before the MMU is enabled. It is
36 * saved in the rodata section, that can be writen before enabling the
37 * MMU. This function must be called after the console is initialized
38 * in the early platform setup.
39 */
40 bl_handle_pauth();
41#endif /* AARCH64 */
42
43 /* Perform late platform-specific setup */
44 bl2_plat_arch_setup();
45}
46
47/*******************************************************************************
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010048 * The only thing to do in BL2 is to load further images and pass control to
Yatharth Kochar51f76f62016-09-12 16:10:33 +010049 * next BL. The memory occupied by BL2 will be reclaimed by BL3x stages. BL2
50 * runs entirely in S-EL1.
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010051 ******************************************************************************/
52void bl2_main(void)
53{
Yatharth Kochar51f76f62016-09-12 16:10:33 +010054 entry_point_info_t *next_bl_ep_info;
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010055
Dan Handley91b624e2014-07-29 17:14:00 +010056 NOTICE("BL2: %s\n", version_string);
57 NOTICE("BL2: %s\n", build_message);
58
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010059 /* Perform remaining generic architectural setup in S-EL1 */
60 bl2_arch_setup();
61
Juan Castillo9246ab82015-01-28 16:46:57 +000062#if TRUSTED_BOARD_BOOT
63 /* Initialize authentication module */
Juan Castilloa08a5e72015-05-19 11:54:12 +010064 auth_mod_init();
Juan Castillo9246ab82015-01-28 16:46:57 +000065#endif /* TRUSTED_BOARD_BOOT */
66
Roberto Vargasbc1ae1f2017-09-26 12:53:01 +010067 /* initialize boot source */
68 bl2_plat_preload_setup();
69
Yatharth Kochar51f76f62016-09-12 16:10:33 +010070 /* Load the subsequent bootloader images. */
71 next_bl_ep_info = bl2_load_images();
Andrew Thoelkea55566d2014-05-28 22:22:55 +010072
Yann Gautier60e5c2f2018-04-26 19:07:17 +020073#if !BL2_AT_EL3
Yatharth Kochardafb2472016-06-30 14:52:12 +010074#ifdef AARCH32
75 /*
76 * For AArch32 state BL1 and BL2 share the MMU setup.
77 * Given that BL2 does not map BL1 regions, MMU needs
78 * to be disabled in order to go back to BL1.
79 */
80 disable_mmu_icache_secure();
81#endif /* AARCH32 */
82
Antonio Nino Diaze3962d02017-02-16 16:17:19 +000083 console_flush();
84
Achin Gupta4f6ad662013-10-25 09:08:21 +010085 /*
Yatharth Kochar51f76f62016-09-12 16:10:33 +010086 * Run next BL image via an SMC to BL1. Information on how to pass
87 * control to the BL32 (if present) and BL33 software images will
88 * be passed to next BL image as an argument.
Achin Gupta4f6ad662013-10-25 09:08:21 +010089 */
Yatharth Kochar51f76f62016-09-12 16:10:33 +010090 smc(BL1_SMC_RUN_IMAGE, (unsigned long)next_bl_ep_info, 0, 0, 0, 0, 0, 0);
Roberto Vargase0e99462017-10-30 14:43:43 +000091#else
92 NOTICE("BL2: Booting " NEXT_IMAGE "\n");
93 print_entry_point_info(next_bl_ep_info);
94 console_flush();
95
96 bl2_run_next_image(next_bl_ep_info);
97#endif
Achin Gupta4f6ad662013-10-25 09:08:21 +010098}