From df988777a0aa099b233b24b5b45d78643ef05acf Mon Sep 17 00:00:00 2001 From: Jason Downs Date: Sun, 16 Feb 1997 10:42:23 +0000 Subject: Add initial ram disk support. --- sys/arch/hp300/dev/rd_root.c | 80 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 sys/arch/hp300/dev/rd_root.c (limited to 'sys/arch/hp300/dev') diff --git a/sys/arch/hp300/dev/rd_root.c b/sys/arch/hp300/dev/rd_root.c new file mode 100644 index 00000000000..036f1f262bc --- /dev/null +++ b/sys/arch/hp300/dev/rd_root.c @@ -0,0 +1,80 @@ +/* $OpenBSD: rd_root.c,v 1.1 1997/02/16 10:42:20 downsj Exp $ */ +/* $NetBSD: rd_root.c,v 1.1 1996/05/20 01:17:31 chuck 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 +#include + +#include + +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"; + +/* + * This is called during autoconfig. + */ +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; + } +} -- cgit v1.2.3