110 lines
3.5 KiB
C
110 lines
3.5 KiB
C
/* $NetBSD: md_hooks.c,v 1.8 2007/03/04 05:59:06 christos Exp $ */
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/*
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* Copyright (c) 1995 Gordon W. Ross
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: md_hooks.c,v 1.8 2007/03/04 05:59:06 christos Exp $");
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#include "opt_md.h"
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#include <sys/param.h>
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#include <sys/reboot.h>
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <uvm/uvm_extern.h>
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#include <dev/md.h>
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#ifdef MEMORY_DISK_ROOT_SIZE
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#define ROOTBYTES (MEMORY_DISK_ROOT_SIZE << DEV_BSHIFT)
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/*
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* This array will be patched to contain a file-system image.
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* See the program: src/distrib/sun3/common/rdsetroot.c
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*/
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size_t md_root_size = ROOTBYTES;
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char md_root_image[ROOTBYTES] = "|This is the root ramdisk!\n";
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#else /* MEMORY_DISK_ROOT_SIZE */
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size_t md_root_size = 0; /* set by machdep.c */
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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));
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#include "fdc.h"
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#endif /* MEMORY_DISK_ROOT_SIZE */
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void
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md_attach_hook(unit, md)
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int unit;
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struct md_conf *md;
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{
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if (unit == 0) {
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#ifdef MEMORY_DISK_ROOT_SIZE
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/* Setup root ramdisk */
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md->md_addr = (void *) md_root_image;
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md->md_size = (size_t) md_root_size;
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md->md_type = MD_KMEM_FIXED;
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#else /* MEMORY_DISK_ROOT_SIZE */
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#ifdef OLD_MEMORY_DISK_SIZE
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if (md_root_size == 0 && OLD_MEMORY_DISK_SIZE)
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md_root_size = (OLD_MEMORY_DISK_SIZE << DEV_BSHIFT);
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#endif /* OLD_MEMORY_DISK_SIZE */
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if (md_root_size != 0) {
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md->md_size = round_page(md_root_size);
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md->md_addr = (void *)uvm_km_alloc(kernel_map,
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md_root_size, 0, UVM_KMF_WIRED | UVM_KMF_ZERO);
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md->md_type = MD_KMEM_FIXED;
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bootmd = md;
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}
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#endif /* MEMORY_DISK_ROOT_SIZE */
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printf("md%d: allocated %ldK (%ld blocks)\n", unit, (long)md->md_size / 1024, (long)md->md_size / DEV_BSIZE);
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}
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}
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/*
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* This is called during open (i.e. mountroot)
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*/
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void
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md_open_hook(unit, md)
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int unit;
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struct md_conf *md;
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{
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if (unit == 0) {
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/* The root memory disk only works single-user. */
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boothowto |= RB_SINGLE;
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#if !defined(MEMORY_DISK_ROOT_SIZE) && NFDC > 0
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load_memory_disc_from_floppy(bootmd, makedev(17, 1)); /* XXX 1.44MB FD */
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#endif
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}
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}
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