77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/* $NetBSD: rd_root.c,v 1.5 1996/10/13 03:21:27 christos 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 <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/sun3/common/rdsetroot.c
|
|
*/
|
|
int rd_root_size = ROOTBYTES;
|
|
char rd_root_image[ROOTBYTES] = "|This is the root ramdisk!\n";
|
|
|
|
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(" fixed, %d blocks", 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;
|
|
}
|
|
}
|