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1999 decky 1
/*
2071 jermar 2
 * Copyright (c) 2006 Martin Decky
1999 decky 3
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup genericmm
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 * @{
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 */
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/** @file
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 */
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#ifndef KERN_RD_H_
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#define KERN_RD_H_
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#include <arch/types.h>
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/**
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 * RAM disk version
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 */
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#define RD_VERSION  1
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/**
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 * RAM disk magic number
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 */
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#define RD_MAGIC_SIZE   4
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#define RD_MAG0         'H'
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#define RD_MAG1         'O'
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#define RD_MAG2         'R'
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#define RD_MAG3         'D'
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/**
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 * RAM disk data encoding types
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 */
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#define RD_DATA_NONE    0
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#define RD_DATA_LSB     1       /* Least significant byte first (little endian) */
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#define RD_DATA_MSB     2       /* Most signigicant byte first (big endian) */
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/**
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 * RAM disk error return codes
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 */
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#define RE_OK           0   /* No error */
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#define RE_INVALID      1   /* Invalid RAM disk image */
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#define RE_UNSUPPORTED      2   /* Non-supported image (e.g. wrong version) */
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/** RAM disk header */
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struct rd_header {
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    uint8_t magic[RD_MAGIC_SIZE];
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    uint8_t version;
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    uint8_t data_type;
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    uint32_t header_size;
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    uint64_t data_size;
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} __attribute__ ((packed));
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typedef struct rd_header rd_header_t;
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extern int init_rd(rd_header_t *addr, size_t size);
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#endif
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/** @}
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 */