Initial commit

package/system/mtd/src/seama.h

@@ -0,0 +1,108 @@
+/* vi: set sw=4 ts=4: */
+/*
+ *	(SEA)ttle i(MA)ge is the image which used in project seattle.
+ *
+ *	Created by David Hsieh <david_hsieh@alphanetworks.com>
+ *	Copyright (C) 2008-2009 Alpha Networks, Inc.
+ *
+ *	This file is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU Lesser General Public
+ *	License as published by the Free Software Foundation; either'
+ *	version 2.1 of the License, or (at your option) any later version.
+ *
+ *	The GNU C Library 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
+ *	Lesser General Public License for more details.
+ *
+ *	You should have received a copy of the GNU Lesser General Public
+ *	License along with the GNU C Library; if not, write to the Free
+ *	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ *	02111-1307 USA.
+ */
+
+#ifndef __SEAMA_HEADER_FILE__
+#define __SEAMA_HEADER_FILE__
+
+#include <stdint.h>
+
+#define SEAMA_MAGIC		0x5EA3A417
+
+/*
+ *	SEAMA looks like the following map.
+ *	All the data of the header should be in network byte order.
+ *
+ *  +-------------+-------------+------------
+ *	| SEAMA magic               |     ^
+ *  +-------------+-------------+     |
+ *	| reserved    | meta size   |     |
+ *  +-------------+-------------+   header
+ *	| image size (0 bytes)      |     |
+ *  +-------------+-------------+     |
+ *	~ Meta data                 ~     v
+ *  +-------------+-------------+------------
+ *	| SEAMA magic               |   ^     ^
+ *  +-------------+-------------+   |     |
+ *	| reserved    | meta size   |   |     |
+ *  +-------------+-------------+   |     |
+ *	| image size                |   |     |
+ *  +-------------+-------------+ header  |
+ *	|                           |   |     |
+ *	| 16 bytes of MD5 digest    |   |     |
+ *	|                           |   |     |
+ *	|                           |   |     |
+ *  +-------------+-------------+   |     |
+ *	~ Meta data                 ~   v     |
+ *  +-------------+-------------+-------  |
+ *	|                           |         |
+ *	| Image of the 1st entity   |         |
+ *	~                           ~ 1st entity
+ *	|                           |         |
+ *	|                           |         v
+ *  +-------------+-------------+-------------
+ *	| SEAMA magic               |   ^     ^
+ *  +-------------+-------------+   |     |
+ *	| reserved    | meta size   |   |     |
+ *  +-------------+-------------+   |     |
+ *	| image size                |   |     |
+ *  +-------------+-------------+ header  |
+ *	|                           |   |     |
+ *	| 16 bytes of MD5 digest    |   |     |
+ *	|                           |   |     |
+ *	|                           |   |     |
+ *  +-------------+-------------+   |     |
+ *	~ Meta data                 ~   v     |
+ *  +-------------+-------------+-------  |
+ *	|                           |         |
+ *	| Image of the 2nd entity   |         |
+ *	~                           ~ 2nd entity
+ *	|                           |         |
+ *	|                           |         v
+ *  +-------------+-------------+-------------
+ */
+
+
+/*
+ *	SEAMA header
+ *
+ *	|<-------- 32 bits -------->|
+ *  +-------------+-------------+
+ *	| SEAMA magic               |
+ *  +-------------+-------------+
+ *	| reserved    | meta size   |
+ *  +-------------+-------------+
+ *	| image size                |
+ *  +-------------+-------------+
+ */
+
+/* seama header */
+struct seama_entity_header {
+	uint32_t	magic;			/* should always be SEAMA_MAGIC. */
+	uint16_t	reserved;		/* reserved for  */
+	uint16_t	metasize;		/* size of the META data */
+	uint32_t	size;			/* size of the image */
+	uint8_t		md5[16];
+} __attribute__ ((packed));
+
+
+#endif