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Memory disk support.

This commit is contained in:
ragge 1998-11-29 14:31:53 +00:00
parent 34a1fe3ee3
commit c738e45cd6
2 changed files with 86 additions and 4 deletions
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9
sys/arch/vax/conf/files.vax
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@ -1,4 +1,4 @@
# $NetBSD: files.vax,v 1.43 1998/11/07 20:58:10 ragge Exp $
# $NetBSD: files.vax,v 1.44 1998/11/29 14:31:53 ragge Exp $
#
# new style config file for vax architecture
#
@ -53,6 +53,10 @@ file arch/vax/mba/ht.c ht needs-flag
# wscons files.
include "dev/wscons/files.wscons"
# Memory Disk for install floppy
file arch/vax/vax/md_root.c memory_disk_hooks
major {md = 23}
# MSCP device drivers
include "arch/vax/mscp/files.mscp"
major {ra = 9}
@ -134,9 +138,6 @@ major { sd = 20 }
major { st = 21 }
major { cd = 22 }
# Memory Disk for install floppy
major { md = 23 }
# builtin NCR5380 SCSI-controller on VAXstation
device ncr: scsi, ncr5380sbc
attach ncr at vsbus

81
sys/arch/vax/vax/md_root.c Normal file
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@ -0,0 +1,81 @@
/* $NetBSD: md_root.c,v 1.1 1998/11/29 14:31:53 ragge 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/systm.h>
#include <sys/reboot.h>
#include <dev/md.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 mdsetimage(8) for details.
*/
u_int32_t md_root_size = ROOTBYTES;
char md_root_image[ROOTBYTES] = "|This is the root ramdisk!\n";
/*
* This is called during autoconfig.
*/
void
md_attach_hook(unit, md)
int unit;
struct md_conf *md;
{
if (unit == 0) {
/* 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;
printf("md%d: internal %dK image area\n", unit,
ROOTBYTES / 1024);
}
}
/*
* 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 ramdisk only works single-user. */
boothowto |= RB_SINGLE;
}
}