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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
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +000024#if !BL2_AT_EL3
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010025/*******************************************************************************
Antonio Nino Diaz6e4b0832019-01-31 10:48:47 +000026 * Setup function for BL2.
27 ******************************************************************************/
28void bl2_setup(u_register_t arg0, u_register_t arg1, u_register_t arg2,
29 u_register_t arg3)
30{
31 /* Perform early platform-specific setup */
32 bl2_early_platform_setup2(arg0, arg1, arg2, arg3);
33
34#ifdef AARCH64
35 /*
36 * Update pointer authentication key before the MMU is enabled. It is
37 * saved in the rodata section, that can be writen before enabling the
38 * MMU. This function must be called after the console is initialized
39 * in the early platform setup.
40 */
41 bl_handle_pauth();
42#endif /* AARCH64 */
43
44 /* Perform late platform-specific setup */
45 bl2_plat_arch_setup();
46}
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +000047
48#else /* if BL2_AT_EL3 */
49/*******************************************************************************
50 * Setup function for BL2 when BL2_AT_EL3=1.
51 ******************************************************************************/
52void bl2_el3_setup(u_register_t arg0, u_register_t arg1, u_register_t arg2,
53 u_register_t arg3)
54{
55 /* Perform early platform-specific setup */
56 bl2_el3_early_platform_setup(arg0, arg1, arg2, arg3);
57
58#ifdef AARCH64
59 /*
60 * Update pointer authentication key before the MMU is enabled. It is
61 * saved in the rodata section, that can be writen before enabling the
62 * MMU. This function must be called after the console is initialized
63 * in the early platform setup.
64 */
65 bl_handle_pauth();
66#endif /* AARCH64 */
67
68 /* Perform late platform-specific setup */
69 bl2_el3_plat_arch_setup();
70}
71#endif /* BL2_AT_EL3 */
Antonio Nino Diaz6e4b0832019-01-31 10:48:47 +000072
73/*******************************************************************************
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010074 * The only thing to do in BL2 is to load further images and pass control to
Yatharth Kochar51f76f62016-09-12 16:10:33 +010075 * next BL. The memory occupied by BL2 will be reclaimed by BL3x stages. BL2
76 * runs entirely in S-EL1.
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010077 ******************************************************************************/
78void bl2_main(void)
79{
Yatharth Kochar51f76f62016-09-12 16:10:33 +010080 entry_point_info_t *next_bl_ep_info;
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010081
Dan Handley91b624e2014-07-29 17:14:00 +010082 NOTICE("BL2: %s\n", version_string);
83 NOTICE("BL2: %s\n", build_message);
84
Sandrine Bailleuxf841ef02014-06-24 14:19:36 +010085 /* Perform remaining generic architectural setup in S-EL1 */
86 bl2_arch_setup();
87
Juan Castillo9246ab82015-01-28 16:46:57 +000088#if TRUSTED_BOARD_BOOT
89 /* Initialize authentication module */
Juan Castilloa08a5e72015-05-19 11:54:12 +010090 auth_mod_init();
Juan Castillo9246ab82015-01-28 16:46:57 +000091#endif /* TRUSTED_BOARD_BOOT */
92
Roberto Vargasbc1ae1f2017-09-26 12:53:01 +010093 /* initialize boot source */
94 bl2_plat_preload_setup();
95
Yatharth Kochar51f76f62016-09-12 16:10:33 +010096 /* Load the subsequent bootloader images. */
97 next_bl_ep_info = bl2_load_images();
Andrew Thoelkea55566d2014-05-28 22:22:55 +010098
Yann Gautier60e5c2f2018-04-26 19:07:17 +020099#if !BL2_AT_EL3
Yatharth Kochardafb2472016-06-30 14:52:12 +0100100#ifdef AARCH32
101 /*
102 * For AArch32 state BL1 and BL2 share the MMU setup.
103 * Given that BL2 does not map BL1 regions, MMU needs
104 * to be disabled in order to go back to BL1.
105 */
106 disable_mmu_icache_secure();
107#endif /* AARCH32 */
108
Antonio Nino Diaze3962d02017-02-16 16:17:19 +0000109 console_flush();
110
Achin Gupta4f6ad662013-10-25 09:08:21 +0100111 /*
Yatharth Kochar51f76f62016-09-12 16:10:33 +0100112 * Run next BL image via an SMC to BL1. Information on how to pass
113 * control to the BL32 (if present) and BL33 software images will
114 * be passed to next BL image as an argument.
Achin Gupta4f6ad662013-10-25 09:08:21 +0100115 */
Yatharth Kochar51f76f62016-09-12 16:10:33 +0100116 smc(BL1_SMC_RUN_IMAGE, (unsigned long)next_bl_ep_info, 0, 0, 0, 0, 0, 0);
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000117#else /* if BL2_AT_EL3 */
Roberto Vargase0e99462017-10-30 14:43:43 +0000118 NOTICE("BL2: Booting " NEXT_IMAGE "\n");
119 print_entry_point_info(next_bl_ep_info);
120 console_flush();
121
122 bl2_run_next_image(next_bl_ep_info);
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000123#endif /* BL2_AT_EL3 */
Achin Gupta4f6ad662013-10-25 09:08:21 +0100124}