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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 193030e5916960f101e1ba406510980452bc47b6 / . / arch / sh / lib / start.S
blob: 37d38d5fb8498450a5c619c5b0527a0e381ba811 [file] [log] [blame]
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +0900[diff] [blame]1/*
Vladimir Zapolskiy9c141b22016-11-28 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 Iwamatsu0b135cf2007-05-13 20:58:00 +0900[diff] [blame]4 *
Wolfgang Denk1a459662013-07-08 09:37:19 +0200[diff] [blame]5 * SPDX-License-Identifier: GPL-2.0+
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +0900[diff] [blame]6 */
7
Wolfgang Denk25ddd1f2010-10-26 14:34:52 +0200[diff] [blame]8#include <asm-offsets.h>
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +0900[diff] [blame]9#include <config.h>
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +0900[diff] [blame]10
11 .text
12 .align 2
13
14 .global _start
Vladimir Zapolskiy9c141b22016-11-28 00:15:33 +0200[diff] [blame]15_start:
Vladimir Zapolskiy35005812016-11-28 00:15:34 +0200[diff] [blame]16#ifdef CONFIG_CPU_SH2
17 .long 0x00000010 /* Ppower ON reset PC*/
18 .long 0x00000000
19 .long 0x00000010 /* Manual reset PC */
20 .long 0x00000000
21#endif
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +0900[diff] [blame]22 mov.l ._lowlevel_init, r0
23100: bsrf r0
24 nop
25
26 bsr 1f
27 nop
281: sts pr, r5
Wolfgang Denk61fb15c52007-12-27 01:52:50 +0100[diff] [blame]29 mov.l ._reloc_dst, r4
Vladimir Zapolskiy9c141b22016-11-28 00:15:33 +0200[diff] [blame]30 add #(_start-1b), r5
Wolfgang Denk61fb15c52007-12-27 01:52:50 +0100[diff] [blame]31 mov.l ._reloc_dst_end, r6
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +0900[diff] [blame]32
332: mov.l @r5+, r1
34 mov.l r1, @r4
35 add #4, r4
36 cmp/hs r6, r4
37 bf 2b
Wolfgang Denk61fb15c52007-12-27 01:52:50 +0100[diff] [blame]38
39 mov.l ._bss_start, r4
40 mov.l ._bss_end, r5
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +0900[diff] [blame]41 mov #0, r1
42
Wolfgang Denk61fb15c52007-12-27 01:52:50 +0100[diff] [blame]433: mov.l r1, @r4 /* bss clear */
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +0900[diff] [blame]44 add #4, r4
45 cmp/hs r5, r4
46 bf 3b
47
48 mov.l ._gd_init, r13 /* global data */
49 mov.l ._stack_init, r15 /* stack */
50
Vladimir Zapolskiy9c141b22016-11-28 00:15:33 +0200[diff] [blame]51 mov.l ._sh_generic_init, r0
52 jsr @r0
53 mov #0, r4
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +0900[diff] [blame]54
55loop:
56 bra loop
57
58 .align 2
59
60._lowlevel_init: .long (lowlevel_init - (100b + 4))
Vladimir Zapolskiy9c141b22016-11-28 00:15:33 +0200[diff] [blame]61._reloc_dst: .long _start
Nobuhiro Iwamatsu0b135cf2007-05-13 20:58:00 +0900[diff] [blame]62._reloc_dst_end: .long reloc_dst_end
63._bss_start: .long bss_start
64._bss_end: .long bss_end
Vladimir Zapolskiy9c141b22016-11-28 00:15:33 +0200[diff] [blame]65._gd_init: .long (_start - GENERATED_GBL_DATA_SIZE)
66._stack_init: .long (_start - GENERATED_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16)
67._sh_generic_init: .long board_init_f