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git01.mediatek.com / filogic / atf / aff8075ce9ec7e8d6e361b779387f1930615c4bb / . / bl2 / aarch64 / bl2_el3_entrypoint.S
blob: 4eab39cd3bfb2370dee51af53d5beca463c991f6 [file] [log] [blame]
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]1/*
Anthony Steinhauser0f7e6012020-01-07 15:44:06 -0800[diff] [blame]2 * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved.
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
Masahiro Yamada65d699d2020-01-17 13:45:02 +0900[diff] [blame]7#include <platform_def.h>
8
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]9#include <arch.h>
10#include <asm_macros.S>
Antonio Nino Diaze0f90632018-12-14 00:18:21 +0000[diff] [blame]11#include <common/bl_common.h>
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]12#include <el3_common_macros.S>
13
14 .globl bl2_entrypoint
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]15 .globl bl2_el3_run_image
16 .globl bl2_run_next_image
17
Masahiro Yamada65d699d2020-01-17 13:45:02 +0900[diff] [blame]18#if BL2_IN_XIP_MEM
19#define FIXUP_SIZE 0
20#else
21#define FIXUP_SIZE ((BL2_LIMIT) - (BL2_BASE))
22#endif
23
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]24func bl2_entrypoint
25 /* Save arguments x0-x3 from previous Boot loader */
26 mov x20, x0
27 mov x21, x1
28 mov x22, x2
29 mov x23, x3
30
31 el3_entrypoint_common \
32 _init_sctlr=1 \
33 _warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS \
34 _secondary_cold_boot=!COLD_BOOT_SINGLE_CPU \
35 _init_memory=1 \
36 _init_c_runtime=1 \
Manish Pandeyc8257682019-11-26 11:34:17 +0000[diff] [blame]37 _exception_vectors=bl2_el3_exceptions \
Masahiro Yamada65d699d2020-01-17 13:45:02 +0900[diff] [blame]38 _pie_fixup_size=FIXUP_SIZE
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]39
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]40 /* ---------------------------------------------
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]41 * Restore parameters of boot rom
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]42 * ---------------------------------------------
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]43 */
44 mov x0, x20
45 mov x1, x21
46 mov x2, x22
47 mov x3, x23
48
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]49 /* ---------------------------------------------
50 * Perform BL2 setup
51 * ---------------------------------------------
52 */
53 bl bl2_el3_setup
54
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]55#if ENABLE_PAUTH
Alexei Fedorov90f2e882019-05-24 12:17:09 +0100[diff] [blame]56 /* ---------------------------------------------
Alexei Fedorovf41355c2019-09-13 14:11:59 +0100[diff] [blame]57 * Program APIAKey_EL1 and enable pointer authentication.
Alexei Fedorov90f2e882019-05-24 12:17:09 +0100[diff] [blame]58 * ---------------------------------------------
59 */
Alexei Fedorovf41355c2019-09-13 14:11:59 +0100[diff] [blame]60 bl pauth_init_enable_el3
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]61#endif /* ENABLE_PAUTH */
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]62
63 /* ---------------------------------------------
64 * Jump to main function.
65 * ---------------------------------------------
66 */
67 bl bl2_main
68
69 /* ---------------------------------------------
70 * Should never reach this point.
71 * ---------------------------------------------
72 */
73 no_ret plat_panic_handler
74endfunc bl2_entrypoint
75
76func bl2_run_next_image
77 mov x20,x0
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]78 /* ---------------------------------------------
79 * MMU needs to be disabled because both BL2 and BL31 execute
80 * in EL3, and therefore share the same address space.
81 * BL31 will initialize the address space according to its
82 * own requirement.
83 * ---------------------------------------------
84 */
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]85 bl disable_mmu_icache_el3
86 tlbi alle3
87 bl bl2_el3_plat_prepare_exit
88
Alexei Fedorovf41355c2019-09-13 14:11:59 +0100[diff] [blame]89#if ENABLE_PAUTH
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]90 /* ---------------------------------------------
Alexei Fedorovf41355c2019-09-13 14:11:59 +0100[diff] [blame]91 * Disable pointer authentication before jumping
92 * to next boot image.
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]93 * ---------------------------------------------
94 */
Alexei Fedorovf41355c2019-09-13 14:11:59 +0100[diff] [blame]95 bl pauth_disable_el3
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]96#endif /* ENABLE_PAUTH */
97
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]98 ldp x0, x1, [x20, #ENTRY_POINT_INFO_PC_OFFSET]
99 msr elr_el3, x0
100 msr spsr_el3, x1
101
102 ldp x6, x7, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x30)]
103 ldp x4, x5, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x20)]
104 ldp x2, x3, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x10)]
105 ldp x0, x1, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x0)]
Anthony Steinhauser0f7e6012020-01-07 15:44:06 -0800[diff] [blame]106 exception_return
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]107endfunc bl2_run_next_image