Commit 3500581e authored by Vladimir Zapolskiy's avatar Vladimir Zapolskiy Committed by Tom Rini

sh: share the correct version of start.S among all cpus

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: default avatarVladimir Zapolskiy <vz@mleia.com>
Reviewed-by: default avatarSimon Glass <sjg@chromium.org>
parent 9c141b2b
......@@ -2,7 +2,7 @@
# SPDX-License-Identifier: GPL-2.0+
#
head-y := arch/sh/cpu/$(CPU)/start.o
head-y := arch/sh/lib/start.o
libs-y += arch/sh/cpu/$(CPU)/
libs-y += arch/sh/lib/
......@@ -8,5 +8,4 @@
# SPDX-License-Identifier: GPL-2.0+
#
extra-y = start.o
obj-y = cpu.o interrupts.o watchdog.o
/*
* Copyright (C) 2007,2008 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
* Copyright (C) 2008 Renesas Solutions Corp.
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm-offsets.h>
#include <config.h>
.text
.align 2
.global _start
_sh_start:
.long 0x00000010 /* Ppower ON reset PC*/
.long 0x00000000
.long 0x00000010 /* Manual reset PC */
.long 0x00000000
_init:
mov.l ._lowlevel_init, r0
100: bsrf r0
nop
bsr 1f
nop
1: sts pr, r5
mov.l ._reloc_dst, r4
add #(_sh_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 */
#TODO(sh maintainer): Fix this up to call the correct code
#mov.l ._sh_generic_init, r0
#jsr @r0
nop
loop:
bra loop
.align 2
._lowlevel_init: .long (lowlevel_init - (100b + 4))
._reloc_dst: .long reloc_dst
._reloc_dst_end: .long reloc_dst_end
._bss_start: .long bss_start
._bss_end: .long bss_end
._gd_init: .long (_sh_start - GENERATED_GBL_DATA_SIZE)
._stack_init: .long (_sh_start - GENERATED_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16)
#._sh_generic_init: .long sh_generic_init
......@@ -11,5 +11,4 @@
# SPDX-License-Identifier: GPL-2.0+
#
extra-y = start.o
obj-y = cpu.o interrupts.o watchdog.o
/*
* (C) Copyright 2007
* Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
*
* (C) Copyright 2007
* Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm-offsets.h>
#include <config.h>
.text
.align 2
.global _start
_sh_start:
mov.l ._lowlevel_init, r0
100: bsrf r0
nop
bsr 1f
nop
1: sts pr, r5
mov.l ._reloc_dst, r4
add #(_sh_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 */
#TODO(sh maintainer): Fix this up to call the correct code
#mov.l ._sh_generic_init, r0
#jsr @r0
nop
loop:
bra loop
.align 2
._lowlevel_init: .long (lowlevel_init - (100b + 4))
._reloc_dst: .long reloc_dst
._reloc_dst_end: .long reloc_dst_end
._bss_start: .long bss_start
._bss_end: .long bss_end
._gd_init: .long (_sh_start - GENERATED_GBL_DATA_SIZE)
._stack_init: .long (_sh_start - GENERATED_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16)
#._sh_generic_init: .long sh_generic_init
......@@ -8,5 +8,4 @@
# SPDX-License-Identifier: GPL-2.0+
#
extra-y = start.o
obj-y = cpu.o interrupts.o watchdog.o cache.o
......@@ -5,6 +5,8 @@
# SPDX-License-Identifier: GPL-2.0+
#
extra-y += start.o
obj-y += board.o
obj-$(CONFIG_CMD_BOOTM) += bootm.o
ifeq ($(CONFIG_CPU_SH2),y)
......
......@@ -13,6 +13,12 @@
.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
......
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