122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/* $NetBSD: md_root.c,v 1.17 2009/04/16 14:46:33 tsutsui Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1996 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Gordon W. Ross.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``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 FOUNDATION OR CONTRIBUTORS
|
|
* 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/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: md_root.c,v 1.17 2009/04/16 14:46:33 tsutsui Exp $");
|
|
|
|
#include "opt_md.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/reboot.h>
|
|
|
|
#include <dev/md.h>
|
|
|
|
#ifdef MEMORY_DISK_DYNAMIC
|
|
#ifdef MEMORY_DISK_IMAGE
|
|
#error MEMORY_DISK_DYNAMIC is not compatible with MEMORY_DISK_IMAGE
|
|
#endif
|
|
size_t md_root_size;
|
|
char *md_root_image;
|
|
#else /* MEMORY_DISK_DYNAMIC */
|
|
|
|
#ifdef MEMORY_DISK_IMAGE
|
|
#ifdef MEMORY_DISK_ROOT_SIZE
|
|
#error MEMORY_DISK_ROOT_SIZE is not compatible with MEMORY_DISK_IMAGE
|
|
#endif
|
|
char md_root_image[] = {
|
|
#include "md_root_image.h"
|
|
};
|
|
uint32_t md_root_size = sizeof(md_root_image) & ~(DEV_BSIZE - 1);
|
|
|
|
#else /* MEMORY_DISK_IMAGE */
|
|
|
|
#ifndef MEMORY_DISK_ROOT_SIZE
|
|
#define MEMORY_DISK_ROOT_SIZE 512
|
|
#endif
|
|
#define ROOTBYTES (MEMORY_DISK_ROOT_SIZE << DEV_BSHIFT)
|
|
|
|
/*
|
|
* This array will be patched to contain a file-system image.
|
|
* See the program mdsetimage(8) for details.
|
|
*/
|
|
uint32_t md_root_size = ROOTBYTES;
|
|
char md_root_image[ROOTBYTES] = "|This is the root ramdisk!\n";
|
|
#endif /* MEMORY_DISK_IMAGE */
|
|
#endif /* MEMORY_DISK_DYNAMIC */
|
|
|
|
#ifndef MEMORY_DISK_RBFLAGS
|
|
#define MEMORY_DISK_RBFLAGS RB_AUTOBOOT /* default boot mode */
|
|
#endif
|
|
|
|
#ifdef MEMORY_DISK_DYNAMIC
|
|
void
|
|
md_root_setconf(char *addr, size_t size)
|
|
{
|
|
|
|
md_is_root = 1;
|
|
md_root_image = addr;
|
|
md_root_size = size;
|
|
}
|
|
#endif /* MEMORY_DISK_DYNAMIC */
|
|
|
|
/*
|
|
* This is called during pseudo-device attachment.
|
|
*/
|
|
#define PBUFLEN sizeof("99999 KB")
|
|
|
|
void
|
|
md_attach_hook(int unit, struct md_conf *md)
|
|
{
|
|
char pbuf[PBUFLEN];
|
|
|
|
if (unit == 0 && md_is_root) {
|
|
/* Setup root ramdisk */
|
|
md->md_addr = (void *)md_root_image;
|
|
md->md_size = (size_t)md_root_size;
|
|
md->md_type = MD_KMEM_FIXED;
|
|
format_bytes(pbuf, sizeof(pbuf), md->md_size);
|
|
aprint_verbose("md%d: internal %s image area\n", unit, pbuf);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This is called during open (i.e. mountroot)
|
|
*/
|
|
void
|
|
md_open_hook(int unit, struct md_conf *md)
|
|
{
|
|
|
|
if (unit == 0 && md_is_root) {
|
|
boothowto |= MEMORY_DISK_RBFLAGS;
|
|
}
|
|
}
|