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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2010-12-01 07:45:00 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-12-05 08:40:17 +0000
commit9a4af112bd252be801a433fc3bef793b7b487c3c (patch)
tree410e13edd7cdfcf4f9dc6203f8f4fc68a5425fdb
parente8a7e48bb248a1196484d3f8afa53bded2b24e71 (diff)
ARM: 6515/1: Add zboot support for SuperH Mobile ARM
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 <kuninori.morimoto.gx@renesas.com> Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/boot/compressed/Makefile4
-rw-r--r--arch/arm/boot/compressed/head-shmobile.S53
-rw-r--r--arch/arm/mach-shmobile/include/mach/zboot.h12
3 files changed, 69 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index 65a7c1c588a..0a8f748e506 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -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
diff --git a/arch/arm/boot/compressed/head-shmobile.S b/arch/arm/boot/compressed/head-shmobile.S
new file mode 100644
index 00000000000..30973b76e6a
--- /dev/null
+++ b/arch/arm/boot/compressed/head-shmobile.S
@@ -0,0 +1,53 @@
+/*
+ * The head-file for SH-Mobile ARM platforms
+ *
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ * Simon Horman <horms@verge.net.au>
+ *
+ * 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 <mach/zboot.h>
+
+ 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 */
diff --git a/arch/arm/mach-shmobile/include/mach/zboot.h b/arch/arm/mach-shmobile/include/mach/zboot.h
new file mode 100644
index 00000000000..e0c218fde68
--- /dev/null
+++ b/arch/arm/mach-shmobile/include/mach/zboot.h
@@ -0,0 +1,12 @@
+#ifndef ZBOOT_H
+#define ZBOOT_H
+
+/**************************************************
+ *
+ * board specific settings
+ *
+ **************************************************/
+
+#error "unsupported board."
+
+#endif /* ZBOOT_H */