u-boot/arch/sh/cpu/sh4/start.S

/*
 * (C) Copyright 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
_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
sh: First support code of SuperH. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> 2007-05-13 11:58:00 +00:00			`/*`
sh: Fix build in start.S By commit 6d8962e814c15807dd6ac5757904be2a02d187b8, label of _start was not usable in start.S and build fail. This change label from _start to _sh_start. ---- arch/sh/cpu/sh4/libsh4.o: In function `_start': (.text+0x204): multiple definition of `_start' arch/sh/cpu/sh4/start.o:(.text+0x0): first defined here ---- Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> 2010-11-24 04:12:17 +00:00			`* (C) Copyright 2007, 2010`
sh: First support code of SuperH. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> 2007-05-13 11:58:00 +00:00			`* Nobuhiro Iwamatsu <iwamatsu@nigauri.org>`
			`*`
Add GPL-2.0+ SPDX-License-Identifier to source files Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com> 2013-07-08 07:37:19 +00:00			`* SPDX-License-Identifier: GPL-2.0+`
sh: First support code of SuperH. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> 2007-05-13 11:58:00 +00:00			`*/`

Replace CONFIG_SYS_GBL_DATA_SIZE by auto-generated value CONFIG_SYS_GBL_DATA_SIZE has always been just a bad workarond for not being able to use "sizeof(struct global_data)" in assembler files. Recent experience has shown that manual synchronization is not reliable enough. This patch renames CONFIG_SYS_GBL_DATA_SIZE into GENERATED_GBL_DATA_SIZE which gets automatically generated by the asm-offsets tool. In the result, all definitions of this value can be deleted from the board config files. We have to make sure that all files that reference such data include the new <asm-offsets.h> file. No other changes have been done yet, but it is obvious that similar changes / simplifications can be done for other, related macro definitions as well. Signed-off-by: Wolfgang Denk <wd@denx.de> Acked-by: Kumar Gala <galak@kernel.crashing.org> 2010-10-26 12:34:52 +00:00			`#include <asm-offsets.h>`
sh: First support code of SuperH. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> 2007-05-13 11:58:00 +00:00			`#include <config.h>`

			`.text`
			`.align 2`

			`.global _start`
sh: Fix build in start.S By commit 6d8962e814c15807dd6ac5757904be2a02d187b8, label of _start was not usable in start.S and build fail. This change label from _start to _sh_start. ---- arch/sh/cpu/sh4/libsh4.o: In function `_start': (.text+0x204): multiple definition of `_start' arch/sh/cpu/sh4/start.o:(.text+0x0): first defined here ---- Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> 2010-11-24 04:12:17 +00:00			`_sh_start:`
sh: First support code of SuperH. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> 2007-05-13 11:58:00 +00:00			`mov.l ._lowlevel_init, r0`
			`100: bsrf r0`
			`nop`

			`bsr 1f`
			`nop`
			`1: sts pr, r5`
Fix coding style issues; update CHANGELOG. Signed-off-by: Wolfgang Denk <wd@denx.de> 2007-12-27 00:52:50 +00:00			`mov.l ._reloc_dst, r4`
sh: Fix build in start.S By commit 6d8962e814c15807dd6ac5757904be2a02d187b8, label of _start was not usable in start.S and build fail. This change label from _start to _sh_start. ---- arch/sh/cpu/sh4/libsh4.o: In function `_start': (.text+0x204): multiple definition of `_start' arch/sh/cpu/sh4/start.o:(.text+0x0): first defined here ---- Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> 2010-11-24 04:12:17 +00:00			`add #(_sh_start-1b), r5`
Fix coding style issues; update CHANGELOG. Signed-off-by: Wolfgang Denk <wd@denx.de> 2007-12-27 00:52:50 +00:00			`mov.l ._reloc_dst_end, r6`
sh: First support code of SuperH. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> 2007-05-13 11:58:00 +00:00
			`2: mov.l @r5+, r1`
			`mov.l r1, @r4`
			`add #4, r4`
			`cmp/hs r6, r4`
			`bf 2b`
Fix coding style issues; update CHANGELOG. Signed-off-by: Wolfgang Denk <wd@denx.de> 2007-12-27 00:52:50 +00:00
			`mov.l ._bss_start, r4`
			`mov.l ._bss_end, r5`
sh: First support code of SuperH. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> 2007-05-13 11:58:00 +00:00			`mov #0, r1`

Fix coding style issues; update CHANGELOG. Signed-off-by: Wolfgang Denk <wd@denx.de> 2007-12-27 00:52:50 +00:00			`3: mov.l r1, @r4 /* bss clear */`
sh: First support code of SuperH. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> 2007-05-13 11:58:00 +00:00			`add #4, r4`
			`cmp/hs r5, r4`
			`bf 3b`

			`mov.l ._gd_init, r13 /* global data */`
			`mov.l ._stack_init, r15 /* stack */`

sh: Fix build errors for generic board This includes the following fixes: - Define needed __init_end symbol - see initr_reloc_global_data() - Drop SH-specific struct bd_info - Add an empty relocate_code() function This prevents build errors with generic board, but the code will still need work. Perhaps this is a better alternative than deleting the code. Signed-off-by: Simon Glass <sjg@chromium.org> 2016-05-15 00:49:29 +00:00			`#TODO(sh maintainer): Fix this up to call the correct code`
			`#mov.l ._sh_generic_init, r0`
			`#jsr @r0`
Fix coding style issues; update CHANGELOG. Signed-off-by: Wolfgang Denk <wd@denx.de> 2007-12-27 00:52:50 +00:00			`nop`
sh: First support code of SuperH. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> 2007-05-13 11:58:00 +00:00
			`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`
sh: Fix build in start.S By commit 6d8962e814c15807dd6ac5757904be2a02d187b8, label of _start was not usable in start.S and build fail. This change label from _start to _sh_start. ---- arch/sh/cpu/sh4/libsh4.o: In function `_start': (.text+0x204): multiple definition of `_start' arch/sh/cpu/sh4/start.o:(.text+0x0): first defined here ---- Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> 2010-11-24 04:12:17 +00:00			`._gd_init: .long (_sh_start - GENERATED_GBL_DATA_SIZE)`
			`._stack_init: .long (_sh_start - GENERATED_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16)`
sh: Fix build errors for generic board This includes the following fixes: - Define needed __init_end symbol - see initr_reloc_global_data() - Drop SH-specific struct bd_info - Add an empty relocate_code() function This prevents build errors with generic board, but the code will still need work. Perhaps this is a better alternative than deleting the code. Signed-off-by: Simon Glass <sjg@chromium.org> 2016-05-15 00:49:29 +00:00			`#._sh_generic_init: .long sh_generic_init`