blob: 2d3efd1fcad753b3425d35c5d5da72002e30fc8c [file] [log] [blame]
Roberto Vargase0e99462017-10-30 14:43:43 +00001/*
2 * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7#include <arch.h>
8#include <asm_macros.S>
9#include <bl_common.h>
10#include <el3_common_macros.S>
11
12 .globl bl2_entrypoint
13 .globl bl2_vector_table
14 .globl bl2_el3_run_image
15 .globl bl2_run_next_image
16
17func bl2_entrypoint
18 /* Save arguments x0-x3 from previous Boot loader */
19 mov x20, x0
20 mov x21, x1
21 mov x22, x2
22 mov x23, x3
23
24 el3_entrypoint_common \
25 _init_sctlr=1 \
26 _warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS \
27 _secondary_cold_boot=!COLD_BOOT_SINGLE_CPU \
28 _init_memory=1 \
29 _init_c_runtime=1 \
30 _exception_vectors=bl2_el3_exceptions
31
32 /*
33 * Restore parameters of boot rom
34 */
35 mov x0, x20
36 mov x1, x21
37 mov x2, x22
38 mov x3, x23
39
40 bl bl2_el3_early_platform_setup
41 bl bl2_el3_plat_arch_setup
42
43 /* ---------------------------------------------
44 * Jump to main function.
45 * ---------------------------------------------
46 */
47 bl bl2_main
48
49 /* ---------------------------------------------
50 * Should never reach this point.
51 * ---------------------------------------------
52 */
53 no_ret plat_panic_handler
54endfunc bl2_entrypoint
55
56func bl2_run_next_image
57 mov x20,x0
58 /*
59 * MMU needs to be disabled because both BL2 and BL31 execute
60 * in EL3, and therefore share the same address space.
61 * BL31 will initialize the address space according to its
62 * own requirement.
63 */
64 bl disable_mmu_icache_el3
65 tlbi alle3
66 bl bl2_el3_plat_prepare_exit
67
68 ldp x0, x1, [x20, #ENTRY_POINT_INFO_PC_OFFSET]
69 msr elr_el3, x0
70 msr spsr_el3, x1
71
72 ldp x6, x7, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x30)]
73 ldp x4, x5, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x20)]
74 ldp x2, x3, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x10)]
75 ldp x0, x1, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x0)]
76 eret
77endfunc bl2_run_next_image