/*	$NetBSD: md.c,v 1.2 1997/11/18 01:19:22 phil Exp $	*/

/*
 * Copyright (c) 1994 Matthias Pfaller.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Matthias Pfaller.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif

#include <sys/param.h>

#include <lib/libsa/stand.h>

#include <pc532/stand/common/samachdep.h>

#ifndef MD_START
extern u_char stext[];
#define MD_START ((void *)((((int)stext) & 0xffffff00) - 2800 * 512))
#endif

int
#if __STDC__
mdopen(struct open_file *f, ...)
#else
mdopen(f, va_alist)
	struct open_file *f;
	va_dcl
#endif
{
	f->f_devdata = MD_START;
	return(0);
}

int
mdclose(f)
	struct open_file *f;
{
	f->f_devdata = NULL;

	return (0);
}

int
mdstrategy(ss, func, dblk, size, buf, rsize)
	void *ss;
	int func;
	daddr_t dblk;		/* block number */
	u_int size;		/* request size in bytes */
	void *buf;
	u_int *rsize;		/* out: bytes transferred */
{
	memcpy(buf, ss + (dblk << DEV_BSHIFT), size);
	*rsize = size;
	return(0);
}