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git01.mediatek.com / filogic / uboot / cb2accdbb2ce82afdb6e915bbee41ec5cce595ee / . / arch / arm / mach-imx / mx8m / lowlevel_init.S
blob: d388f3ba956b5f3a15321702c2a082022789e58b [file] [log] [blame]
Peng Faneae4de22018-01-10 13:20:37 +0800[diff] [blame]1/*
2 * Copyright 2017 NXP
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 */
6
7#include <config.h>
8
9.align 8
10.global rom_pointer
11rom_pointer:
12 .space 256
13
14/*
15 * Routine: save_boot_params (called after reset from start.S)
16 */
17
18.global save_boot_params
19save_boot_params:
20 /* The firmware provided ATAG/FDT address can be found in r2/x0 */
21 adr x0, rom_pointer
22 stp x1, x2, [x0], #16
23 stp x3, x4, [x0], #16
24 stp x5, x6, [x0], #16
25 stp x7, x8, [x0], #16
26 stp x9, x10, [x0], #16
27 stp x11, x12, [x0], #16
28 stp x13, x14, [x0], #16
29 stp x15, x16, [x0], #16
30 stp x17, x18, [x0], #16
31 stp x19, x20, [x0], #16
32 stp x21, x22, [x0], #16
33 stp x23, x24, [x0], #16
34 stp x25, x26, [x0], #16
35 stp x27, x28, [x0], #16
36 stp x29, x30, [x0], #16
37 mov x30, sp
38 str x30, [x0], #8
39
40 /* Returns */
41 b save_boot_params_ret
42
43.global restore_boot_params
44restore_boot_params:
45 adr x0, rom_pointer
46 ldp x1, x2, [x0], #16
47 ldp x3, x4, [x0], #16
48 ldp x5, x6, [x0], #16
49 ldp x7, x8, [x0], #16
50 ldp x9, x10, [x0], #16
51 ldp x11, x12, [x0], #16
52 ldp x13, x14, [x0], #16
53 ldp x15, x16, [x0], #16
54 ldp x17, x18, [x0], #16
55 ldp x19, x20, [x0], #16
56 ldp x21, x22, [x0], #16
57 ldp x23, x24, [x0], #16
58 ldp x25, x26, [x0], #16
59 ldp x27, x28, [x0], #16
60 ldp x29, x30, [x0], #16
61 ldr x0, [x0]
62 mov sp, x0
63 ret