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git01.mediatek.com / filogic / uboot / 946c8c8e8421b786887954dcb4dfa2f7fa5f0d40 / . / arch / sh / cpu / sh4 / start.S
blob: 416adcfb1c01f0964ec2880524e85ce8cbae7bb4 [file] [log] [blame]
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]1/*
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame^]2 * Copyright (C) 2016 Vladimir Zapolskiy <vz@mleia.com>
3 * Copyright (C) 2007, 2010 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]4 *
Wolfgang Denkd79de1d2013-07-08 09:37:19 +0200[diff] [blame]5 * SPDX-License-Identifier: GPL-2.0+
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]6 */
7
Wolfgang Denk0191e472010-10-26 14:34:52 +0200[diff] [blame]8#include <asm-offsets.h>
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]9#include <config.h>
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]10
11 .text
12 .align 2
13
14 .global _start
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame^]15_start:
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]16 mov.l ._lowlevel_init, r0
17100: bsrf r0
18 nop
19
20 bsr 1f
21 nop
221: sts pr, r5
Wolfgang Denk0a5c2142007-12-27 01:52:50 +0100[diff] [blame]23 mov.l ._reloc_dst, r4
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame^]24 add #(_start-1b), r5
Wolfgang Denk0a5c2142007-12-27 01:52:50 +0100[diff] [blame]25 mov.l ._reloc_dst_end, r6
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]26
272: mov.l @r5+, r1
28 mov.l r1, @r4
29 add #4, r4
30 cmp/hs r6, r4
31 bf 2b
Wolfgang Denk0a5c2142007-12-27 01:52:50 +0100[diff] [blame]32
33 mov.l ._bss_start, r4
34 mov.l ._bss_end, r5
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]35 mov #0, r1
36
Wolfgang Denk0a5c2142007-12-27 01:52:50 +0100[diff] [blame]373: mov.l r1, @r4 /* bss clear */
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]38 add #4, r4
39 cmp/hs r5, r4
40 bf 3b
41
42 mov.l ._gd_init, r13 /* global data */
43 mov.l ._stack_init, r15 /* stack */
44
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame^]45 mov.l ._sh_generic_init, r0
46 jsr @r0
47 mov #0, r4
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]48
49loop:
50 bra loop
51
52 .align 2
53
54._lowlevel_init: .long (lowlevel_init - (100b + 4))
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame^]55._reloc_dst: .long _start
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]56._reloc_dst_end: .long reloc_dst_end
57._bss_start: .long bss_start
58._bss_end: .long bss_end
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame^]59._gd_init: .long (_start - GENERATED_GBL_DATA_SIZE)
60._stack_init: .long (_start - GENERATED_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16)
61._sh_generic_init: .long board_init_f