108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/* $NetBSD: md_hooks.c,v 1.16 2000/06/29 08:53:00 mrg 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 "opt_md.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/reboot.h>
|
|
#include <sys/device.h>
|
|
#include <sys/systm.h>
|
|
|
|
#include <uvm/uvm_extern.h>
|
|
|
|
#include <dev/md.h>
|
|
|
|
#include "opt_mdsize.h"
|
|
|
|
#ifdef MINIROOTSIZE
|
|
#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 md_root_size = ROOTBYTES;
|
|
char md_root_image[ROOTBYTES] = "|This is the root ramdisk!\n";
|
|
|
|
#else /* MINIROOTSIZE */
|
|
|
|
u_int memory_disc_size = 0; /* set by machdep.c */
|
|
static struct md_conf *bootmd = NULL;
|
|
|
|
extern int load_memory_disc_from_floppy __P((struct md_conf *md, dev_t dev));
|
|
|
|
#include "fdc.h"
|
|
#endif /* MINIROOTSIZE */
|
|
|
|
void
|
|
md_attach_hook(unit, md)
|
|
int unit;
|
|
struct md_conf *md;
|
|
{
|
|
if (unit == 0) {
|
|
#ifdef MINIROOTSIZE
|
|
/* Setup root ramdisk */
|
|
md->md_addr = (caddr_t) md_root_image;
|
|
md->md_size = (size_t) md_root_size;
|
|
md->md_type = MD_KMEM_FIXED;
|
|
#else /* MINIROOTSIZE */
|
|
#ifdef MEMORY_DISK_SIZE
|
|
if (memory_disc_size == 0 && MEMORY_DISK_SIZE)
|
|
memory_disc_size = (MEMORY_DISK_SIZE << DEV_BSHIFT);
|
|
#endif /* MEMORY_DISK_SIZE */
|
|
if (memory_disc_size != 0) {
|
|
md->md_size = round_page(memory_disc_size);
|
|
md->md_addr = (caddr_t)uvm_km_zalloc(kernel_map, memory_disc_size);
|
|
md->md_type = MD_KMEM_FIXED;
|
|
bootmd = md;
|
|
}
|
|
#endif /* MINIROOTSIZE */
|
|
printf("md%d: allocated %dK (%d blocks)\n", unit, md->md_size / 1024, md->md_size / DEV_BSIZE);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* This is called during open (i.e. mountroot)
|
|
*/
|
|
|
|
void
|
|
md_open_hook(unit, md)
|
|
int unit;
|
|
struct md_conf *md;
|
|
{
|
|
if (unit == 0) {
|
|
/* The root memory disk only works single-user. */
|
|
boothowto |= RB_SINGLE;
|
|
#if !defined(MINIROOTSIZE) && NFDC > 0
|
|
load_memory_disc_from_floppy(bootmd, makedev(17, 1)); /* XXX 1.44MB FD */
|
|
#endif
|
|
}
|
|
}
|