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/* $OpenBSD: rd_root.c,v 1.2 1997/05/29 01:14:22 niklas Exp $ */
/*
* Copyright (c) 1995 Gordon W. Ross
* 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. 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.
*/
#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/systm.h>
#include <dev/ramdisk.h>
extern int boothowto;
#ifndef MINIROOTSIZE
#define MINIROOTSIZE 512
#endif
#define ROOTBYTES (MINIROOTSIZE << DEV_BSHIFT)
/*
* This array will be patched to contain a file-system image.
* See the program: src/distrib/common/rdsetroot.c
*/
int rd_root_size = ROOTBYTES;
char rd_root_image[ROOTBYTES] = "|This is the root ramdisk!\n";
/*
* This is called during autoconfig.
*/
void
rd_attach_hook(unit, rd)
int unit;
struct rd_conf *rd;
{
if (unit == 0) {
/* Setup root ramdisk */
rd->rd_addr = (caddr_t) rd_root_image;
rd->rd_size = (size_t) rd_root_size;
rd->rd_type = RD_KMEM_FIXED;
printf("rd%d: fixed, %d blocks\n", unit, MINIROOTSIZE);
}
}
/*
* This is called during open (i.e. mountroot)
*/
void
rd_open_hook(unit, rd)
int unit;
struct rd_conf *rd;
{
if (unit == 0) {
/* The root ramdisk only works single-user. */
boothowto |= RB_SINGLE;
}
}
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