3500581ef3
It is easy to note that SH2/SH3/SH4 start.S code is practically the same with a minor difference for SH2 where a short data header is present. To avoid unwanted code duplication and to automatically convert SH2 and SH3 platforms to generic board support move fixed SH4 start.S into arch/sh/lib/start.S and share it among all platforms. Signed-off-by: Vladimir Zapolskiy <vz@mleia.com> Reviewed-by: Simon Glass <sjg@chromium.org>
68 lines
1.2 KiB
ArmAsm
68 lines
1.2 KiB
ArmAsm
/*
|
|
* Copyright (C) 2016 Vladimir Zapolskiy <vz@mleia.com>
|
|
* Copyright (C) 2007, 2010 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <asm-offsets.h>
|
|
#include <config.h>
|
|
|
|
.text
|
|
.align 2
|
|
|
|
.global _start
|
|
_start:
|
|
#ifdef CONFIG_CPU_SH2
|
|
.long 0x00000010 /* Ppower ON reset PC*/
|
|
.long 0x00000000
|
|
.long 0x00000010 /* Manual reset PC */
|
|
.long 0x00000000
|
|
#endif
|
|
mov.l ._lowlevel_init, r0
|
|
100: bsrf r0
|
|
nop
|
|
|
|
bsr 1f
|
|
nop
|
|
1: sts pr, r5
|
|
mov.l ._reloc_dst, r4
|
|
add #(_start-1b), r5
|
|
mov.l ._reloc_dst_end, r6
|
|
|
|
2: mov.l @r5+, r1
|
|
mov.l r1, @r4
|
|
add #4, r4
|
|
cmp/hs r6, r4
|
|
bf 2b
|
|
|
|
mov.l ._bss_start, r4
|
|
mov.l ._bss_end, r5
|
|
mov #0, r1
|
|
|
|
3: mov.l r1, @r4 /* bss clear */
|
|
add #4, r4
|
|
cmp/hs r5, r4
|
|
bf 3b
|
|
|
|
mov.l ._gd_init, r13 /* global data */
|
|
mov.l ._stack_init, r15 /* stack */
|
|
|
|
mov.l ._sh_generic_init, r0
|
|
jsr @r0
|
|
mov #0, r4
|
|
|
|
loop:
|
|
bra loop
|
|
|
|
.align 2
|
|
|
|
._lowlevel_init: .long (lowlevel_init - (100b + 4))
|
|
._reloc_dst: .long _start
|
|
._reloc_dst_end: .long reloc_dst_end
|
|
._bss_start: .long bss_start
|
|
._bss_end: .long bss_end
|
|
._gd_init: .long (_start - GENERATED_GBL_DATA_SIZE)
|
|
._stack_init: .long (_start - GENERATED_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16)
|
|
._sh_generic_init: .long board_init_f
|