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git01.mediatek.com / filogic / atf / 5b8a672ca94ed6056e90e108542fbb737c800dc8 / . / bl2 / aarch64 / bl2_el3_entrypoint.S
blob: f97121ef019ef165e310c2eb28393cd4905885a0 [file] [log] [blame]
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]1/*
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]2 * Copyright (c) 2017-2019, 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
7#include <arch.h>
8#include <asm_macros.S>
Antonio Nino Diaze0f90632018-12-14 00:18:21 +0000[diff] [blame]9#include <common/bl_common.h>
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]10#include <el3_common_macros.S>
11
12 .globl bl2_entrypoint
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]13 .globl bl2_el3_run_image
14 .globl bl2_run_next_image
15
16func bl2_entrypoint
17 /* Save arguments x0-x3 from previous Boot loader */
18 mov x20, x0
19 mov x21, x1
20 mov x22, x2
21 mov x23, x3
22
23 el3_entrypoint_common \
24 _init_sctlr=1 \
25 _warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS \
26 _secondary_cold_boot=!COLD_BOOT_SINGLE_CPU \
27 _init_memory=1 \
28 _init_c_runtime=1 \
Manish Pandeyc8257682019-11-26 11:34:17 +0000[diff] [blame]29 _exception_vectors=bl2_el3_exceptions \
30 _pie_fixup_size=0
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]31
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]32 /* ---------------------------------------------
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]33 * Restore parameters of boot rom
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]34 * ---------------------------------------------
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]35 */
36 mov x0, x20
37 mov x1, x21
38 mov x2, x22
39 mov x3, x23
40
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]41 /* ---------------------------------------------
42 * Perform BL2 setup
43 * ---------------------------------------------
44 */
45 bl bl2_el3_setup
46
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]47#if ENABLE_PAUTH
Alexei Fedorov90f2e882019-05-24 12:17:09 +0100[diff] [blame]48 /* ---------------------------------------------
Alexei Fedorovf41355c2019-09-13 14:11:59 +0100[diff] [blame]49 * Program APIAKey_EL1 and enable pointer authentication.
Alexei Fedorov90f2e882019-05-24 12:17:09 +0100[diff] [blame]50 * ---------------------------------------------
51 */
Alexei Fedorovf41355c2019-09-13 14:11:59 +0100[diff] [blame]52 bl pauth_init_enable_el3
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]53#endif /* ENABLE_PAUTH */
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]54
55 /* ---------------------------------------------
56 * Jump to main function.
57 * ---------------------------------------------
58 */
59 bl bl2_main
60
61 /* ---------------------------------------------
62 * Should never reach this point.
63 * ---------------------------------------------
64 */
65 no_ret plat_panic_handler
66endfunc bl2_entrypoint
67
68func bl2_run_next_image
69 mov x20,x0
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]70 /* ---------------------------------------------
71 * MMU needs to be disabled because both BL2 and BL31 execute
72 * in EL3, and therefore share the same address space.
73 * BL31 will initialize the address space according to its
74 * own requirement.
75 * ---------------------------------------------
76 */
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]77 bl disable_mmu_icache_el3
78 tlbi alle3
79 bl bl2_el3_plat_prepare_exit
80
Alexei Fedorovf41355c2019-09-13 14:11:59 +0100[diff] [blame]81#if ENABLE_PAUTH
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]82 /* ---------------------------------------------
Alexei Fedorovf41355c2019-09-13 14:11:59 +0100[diff] [blame]83 * Disable pointer authentication before jumping
84 * to next boot image.
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]85 * ---------------------------------------------
86 */
Alexei Fedorovf41355c2019-09-13 14:11:59 +0100[diff] [blame]87 bl pauth_disable_el3
Antonio Nino Diaz4f29fb72019-01-31 17:40:44 +0000[diff] [blame]88#endif /* ENABLE_PAUTH */
89
Roberto Vargase0e99462017-10-30 14:43:43 +0000[diff] [blame]90 ldp x0, x1, [x20, #ENTRY_POINT_INFO_PC_OFFSET]
91 msr elr_el3, x0
92 msr spsr_el3, x1
93
94 ldp x6, x7, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x30)]
95 ldp x4, x5, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x20)]
96 ldp x2, x3, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x10)]
97 ldp x0, x1, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x0)]
98 eret
99endfunc bl2_run_next_image