From mboxrd@z Thu Jan 1 00:00:00 1970 From: Simon Horman Date: Thu, 14 Oct 2010 09:12:32 +0000 Subject: [patch v3 1/2] ARM: Add zboot support for SuperH Mobile ARM Message-Id: <20101014091434.308274185@vergenet.net> List-Id: References: <20101014091231.858799238@vergenet.net> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org From: Kuninori Morimoto When CONFIG_ZBOOT_ROM is selected, the resulting zImage file will be small boot loader and may be burned to rom or flash. This is the non-board-specific framework portion of this patch-set. Signed-off-by: Kuninori Morimoto Signed-off-by: Simon Horman --- v2: * As suggested by Magnus Damm; Implemented by Simon Horman - Initialise atags in framework and pass atags to kernel v3: * As suggested by Magnus Damm; Implemented by Simon Horman - Initialise atags directly rather than using assembly Index: linux-2.6-arm/arch/arm/boot/compressed/Makefile =================================--- linux-2.6-arm.orig/arch/arm/boot/compressed/Makefile 2010-10-14 16:47:47.000000000 +0900 +++ linux-2.6-arm/arch/arm/boot/compressed/Makefile 2010-10-14 16:47:53.000000000 +0900 @@ -45,6 +45,10 @@ else endif endif +ifeq ($(CONFIG_ARCH_SHMOBILE),y) +OBJS += head-shmobile.o +endif + # # We now have a PIC decompressor implementation. Decompressors running # from RAM should not define ZTEXTADDR. Decompressors running directly Index: linux-2.6-arm/arch/arm/boot/compressed/head-shmobile.S =================================--- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6-arm/arch/arm/boot/compressed/head-shmobile.S 2010-10-14 16:57:54.000000000 +0900 @@ -0,0 +1,53 @@ +/* + * The head-file for SH-Mobile ARM platforms + * + * Kuninori Morimoto + * Simon Horman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifdef CONFIG_ZBOOT_ROM + + .section ".start", "ax" + + /* load board-specific initialization code */ +#include + + b 1f +__atags:@ tag #1 + .long 12 @ tag->hdr.size = tag_size(tag_core); + .long 0x54410001 @ tag->hdr.tag = ATAG_CORE; + .long 0 @ tag->u.core.flags = 0; + .long 0 @ tag->u.core.pagesize = 0; + .long 0 @ tag->u.core.rootdev = 0; + @ tag #2 + .long 8 @ tag->hdr.size = tag_size(tag_mem32); + .long 0x54410002 @ tag->hdr.tag = ATAG_MEM; + .long CONFIG_MEMORY_SIZE @ tag->u.mem.size = CONFIG_MEMORY_SIZE; + .long CONFIG_MEMORY_START @ @ tag->u.mem.start = CONFIG_MEMORY_START; + @ tag #3 + .long 0 @ tag->hdr.size = 0 + .long 0 @ tag->hdr.tag = ATAG_NONE; +1: + + /* Set board ID necessary for boot */ + ldr r7, 1f @ Set machine type register + adr r8, __atags @ Set atag register + b 2f + +1 : .long MACH_TYPE +2 : + +#endif /* CONFIG_ZBOOT_ROM */ Index: linux-2.6-arm/arch/arm/mach-shmobile/include/mach/zboot.h =================================--- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6-arm/arch/arm/mach-shmobile/include/mach/zboot.h 2010-10-14 16:55:20.000000000 +0900 @@ -0,0 +1,12 @@ +#ifndef ZBOOT_H +#define ZBOOT_H + +/************************************************** + * + * board specific settings + * + **************************************************/ + +#error "unsupported board." + +#endif /* ZBOOT_H */