NetBSD/sys/arch/arm32/dev/md_hooks.c

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/* $NetBSD: md_hooks.c,v 1.10 1997/10/14 11:32:47 mark 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/device.h>
#include <sys/systm.h>
#include <vm/vm.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
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#include <dev/md.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 */
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u_int memory_disc_size = 0; /* set by machdep.c */
static struct md_conf *bootmd = NULL;
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extern int load_memory_disc_from_floppy __P((struct md_conf *md, dev_t dev));
#include "fdc.h"
#endif /* MINIROOTSIZE */
void
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md_attach_hook(unit, md)
int unit;
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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
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if (memory_disc_size == 0 && MEMORY_DISK_SIZE)
memory_disc_size = (MEMORY_DISK_SIZE << DEV_BSHIFT);
#endif /* MEMORY_DISK_SIZE */
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if (memory_disc_size != 0) {
md->md_size = round_page(memory_disc_size);
md->md_addr = (caddr_t)kmem_alloc(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
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md_open_hook(unit, md)
int unit;
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struct md_conf *md;
{
if (unit == 0) {
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/* 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
}
}