/* $NetBSD: md_root.c,v 1.1.1.1 1998/06/20 04:58:51 eeh 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * 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 REGENTS 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 #include #include #include #include #include #include #include extern int boothowto; int (*md_read_image) __P((size_t *, caddr_t *)); /* * This is called during autoconfig. */ void md_attach_hook(unit, md) int unit; struct md_conf *md; { if (unit == 0 && md_read_image != NULL) { /* Setup root ramdisk */ if ((*md_read_image)(&md->md_size, &md->md_addr) != 0) panic("md_attach"); md->md_type = MD_KMEM_FIXED; printf("md0: fixed, %d blocks", md->md_size >> DEV_BSHIFT); } } /* * 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; } } #if 0 int md_read_image (dev, addr) dev_t dev; caddr_t addr; { off_t offset; int error; extern struct proc proc0; struct buf fishtank; struct buf *bp = &fishtank; error = (*bdevsw[major(dev)].d_open)(dev, 0, S_IFCHR, &proc0); if (error) panic("md_read_image: open: error %d", error); bzero(bp, sizeof(*bp)); offset = 0; for (;;) { iovec.iov_base = addr; iovec.iov_len = DEV_BSIZE; uio.uio_iov = &iovec; uio.uio_iovcnt = 1; uio.uio_offset = offset; uio.uio_resid = DEV_BSIZE; uio.uio_segflg = UIO_SYSSPACE; uio.uio_rw = UIO_READ; uio.uio_procp = &proc0; error = (*cdevsw[major(dev)].d_read)(dev, &uio, 0); if (error) panic("md_read_image: read: error %d", error); if (uio.uio_resid != 0) break; addr += DEV_BSIZE; offset += DEV_BSIZE; md_root_size += DEV_BSIZE; if (offset + DEV_BSIZE > md_root_size) break; } (void)(*bdevsw[major(dev)].d_close)(dev, 0, S_IFCHR, &proc0); md_root_size = offset; return 0; } #endif