diff options
author | Jason Downs <downsj@cvs.openbsd.org> | 1997-02-16 10:42:23 +0000 |
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committer | Jason Downs <downsj@cvs.openbsd.org> | 1997-02-16 10:42:23 +0000 |
commit | df988777a0aa099b233b24b5b45d78643ef05acf (patch) | |
tree | 59eafb2076850e75d16bf0b78e6e1eeb5cb7dd25 /sys/arch/hp300/dev | |
parent | 4aefd32ee77b4b1a48834fe3fc4a35d9c63b2479 (diff) |
Add initial ram disk support.
Diffstat (limited to 'sys/arch/hp300/dev')
-rw-r--r-- | sys/arch/hp300/dev/rd_root.c | 80 |
1 files changed, 80 insertions, 0 deletions
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 <sys/param.h> +#include <sys/reboot.h> + +#include <dev/ramdisk.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: 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; + } +} |