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: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

6 files changed, 0 insertions, 195 deletions

diff --git a/arch/sh/cpu/sh2/Makefile b/arch/sh/cpu/sh2/Makefile
index a19ed5ecf5..80fff49209 100644
--- a/arch/sh/cpu/sh2/Makefile
+++ b/arch/sh/cpu/sh2/Makefile
@@ -8,5 +8,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-extra-y	= start.o
 obj-y	= cpu.o interrupts.o watchdog.o
diff --git a/arch/sh/cpu/sh2/start.S b/arch/sh/cpu/sh2/start.S
deleted file mode 100644
index 6171edcce2..0000000000
--- a/arch/sh/cpu/sh2/start.S
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * 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
diff --git a/arch/sh/cpu/sh3/Makefile b/arch/sh/cpu/sh3/Makefile
index 85917b908c..cddc15b5cc 100644
--- a/arch/sh/cpu/sh3/Makefile
+++ b/arch/sh/cpu/sh3/Makefile
@@ -11,5 +11,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-extra-y	= start.o
 obj-y	= cpu.o interrupts.o watchdog.o
diff --git a/arch/sh/cpu/sh3/start.S b/arch/sh/cpu/sh3/start.S
deleted file mode 100644
index 9ed7198f2b..0000000000
--- a/arch/sh/cpu/sh3/start.S
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * (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
diff --git a/arch/sh/cpu/sh4/Makefile b/arch/sh/cpu/sh4/Makefile
index 38c6188c38..976994b082 100644
--- a/arch/sh/cpu/sh4/Makefile
+++ b/arch/sh/cpu/sh4/Makefile
@@ -8,5 +8,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-extra-y	= start.o
 obj-y	= cpu.o interrupts.o watchdog.o cache.o
diff --git a/arch/sh/cpu/sh4/start.S b/arch/sh/cpu/sh4/start.S
deleted file mode 100644
index 416adcfb1c..0000000000
--- a/arch/sh/cpu/sh4/start.S
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * 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:
-	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