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git01.mediatek.com / filogic / uboot / 471d9173b21e574c2ced5a495105fba4eab989fe / . / arch / sh / lib / start.S
blob: ddb9aa9f87b167103175610ca1196ad2fa3670f4 [file] [log] [blame]
Tom Rini10e47792018-05-06 17:58:06 -0400[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0+ */
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]2/*
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame]3 * Copyright (C) 2016 Vladimir Zapolskiy <vz@mleia.com>
4 * Copyright (C) 2007, 2010 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]5 */
6
Wolfgang Denk0191e472010-10-26 14:34:52 +0200[diff] [blame]7#include <asm-offsets.h>
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]8#include <config.h>
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]9
10 .text
11 .align 2
12
13 .global _start
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame]14_start:
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]15 mov.l ._lowlevel_init, r0
16100: bsrf r0
17 nop
18
19 bsr 1f
20 nop
211: sts pr, r5
Wolfgang Denk0a5c2142007-12-27 01:52:50 +0100[diff] [blame]22 mov.l ._reloc_dst, r4
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame]23 add #(_start-1b), r5
Wolfgang Denk0a5c2142007-12-27 01:52:50 +0100[diff] [blame]24 mov.l ._reloc_dst_end, r6
Marek Vasut5d0cd632019-09-01 18:05:03 +0200[diff] [blame]25#ifdef CONFIG_OF_SEPARATE
26 mov.l ._reloc_size, r0
27 add r5, r0
28 add #4, r0
29 mov.l @r0, r0
30 swap.b r0, r0
31 swap.w r0, r0
32 swap.b r0, r0
33 add #4, r0
34 add r0, r6
35#endif
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]36
372: mov.l @r5+, r1
38 mov.l r1, @r4
39 add #4, r4
40 cmp/hs r6, r4
41 bf 2b
Wolfgang Denk0a5c2142007-12-27 01:52:50 +0100[diff] [blame]42
Marek Vasut5d0cd632019-09-01 18:05:03 +0200[diff] [blame]43#ifndef CONFIG_OF_SEPARATE
Wolfgang Denk0a5c2142007-12-27 01:52:50 +0100[diff] [blame]44 mov.l ._bss_start, r4
45 mov.l ._bss_end, r5
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]46 mov #0, r1
47
Wolfgang Denk0a5c2142007-12-27 01:52:50 +0100[diff] [blame]483: mov.l r1, @r4 /* bss clear */
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]49 add #4, r4
50 cmp/hs r5, r4
51 bf 3b
Marek Vasut5d0cd632019-09-01 18:05:03 +0200[diff] [blame]52#endif
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]53
54 mov.l ._gd_init, r13 /* global data */
55 mov.l ._stack_init, r15 /* stack */
Marek Vasut9a9247c2020-05-09 22:02:50 +0200[diff] [blame]56#if CONFIG_VAL(SYS_MALLOC_F_LEN)
57 mov.l ._gd_malloc_base, r14
58 mov.l r15, @r14
59#endif
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame]60 mov.l ._sh_generic_init, r0
61 jsr @r0
62 mov #0, r4
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]63
64loop:
65 bra loop
66
67 .align 2
68
69._lowlevel_init: .long (lowlevel_init - (100b + 4))
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame]70._reloc_dst: .long _start
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]71._reloc_dst_end: .long reloc_dst_end
Marek Vasut5d0cd632019-09-01 18:05:03 +0200[diff] [blame]72._reloc_size: .long (_end - _start)
Nobuhiro Iwamatsu970dc332007-05-13 20:58:00 +0900[diff] [blame]73._bss_start: .long bss_start
74._bss_end: .long bss_end
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame]75._gd_init: .long (_start - GENERATED_GBL_DATA_SIZE)
Marek Vasut9a9247c2020-05-09 22:02:50 +0200[diff] [blame]76#if CONFIG_VAL(SYS_MALLOC_F_LEN)
77._gd_malloc_base: .long (_start - GENERATED_GBL_DATA_SIZE + GD_MALLOC_BASE)
78#endif
Vladimir Zapolskiy946c8c82016-11-28 00:15:33 +0200[diff] [blame]79._stack_init: .long (_start - GENERATED_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16)
80._sh_generic_init: .long board_init_f