/* $NetBSD: disk.c,v 1.7 2016/02/14 18:01:45 dholland Exp $ */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Van Jacobson of Lawrence Berkeley Laboratory and Ralph Campbell. * * 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. Neither the name of the University 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 REGENTS 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. * * @(#)disk.c 8.1 (Berkeley) 6/10/93 */ #include <lib/libsa/stand.h> #include <sys/param.h> #include <sys/disklabel.h> #include <dev/arcbios/arcbios.h> #include "common.h" #include "disk.h" #define RF_PROTECTED_SECTORS 64 /* XXX refer to <.../rf_optnames.h> */ struct disk_softc { u_long sc_fd; /* ARCBIOS file id */ int sc_part; /* disk partition number */ struct disklabel sc_label; /* disk label for this disk */ }; int diskstrategy(void *devdata, int rw, daddr_t bn, size_t reqcnt, void *addr, size_t *cnt) { struct disk_softc *sc = (struct disk_softc *)devdata; int part = sc->sc_part; struct partition *pp = &sc->sc_label.d_partitions[part]; long error; int64_t offset; u_long count; offset = bn; /* * Partial-block transfers not handled. */ if (reqcnt & (DEV_BSIZE - 1)) { *cnt = 0; return EINVAL; } offset += pp->p_offset; if (pp->p_fstype == FS_RAID) offset += RF_PROTECTED_SECTORS; /* * Convert from blocks to bytes. */ offset *= DEV_BSIZE; error = arcbios_Seek(sc->sc_fd, &offset, 0); if (error != ARCBIOS_ESUCCESS) return EIO; error = arcbios_Read(sc->sc_fd, addr, reqcnt, &count); if (error != ARCBIOS_ESUCCESS) return EIO; *cnt = count; return 0; } int diskopen(struct open_file *f, ...) { int part; struct disk_softc *sc; struct disklabel *lp; #ifdef arc char *msg, buf[DEV_BSIZE]; size_t cnt; int mbrp_off, i; #endif int error; u_long fd; char *device; va_list ap; va_start(ap, f); device = va_arg(ap, char *); va_end(ap); /* * For NetBSD/sgimips, since we use the SGI partition map directly, * we fake an in-core NetBSD disklabel with offset of 0. * * For NetBSD/arc, there is a MBR partition map on the disk, which we * then expect to find a NetBSD disklabel within the MBR partition. * We require that the kernel be located in first partition in the * NetBSD disklabel, because we have not other way to represent the * root partition. */ part = 0; if (part >= MAXPARTITIONS) return ENXIO; error = arcbios_Open(device, 0, &fd); if (error) { printf("diskopen: open failed, errno = %d\n", error); return ENXIO; } sc = alloc(sizeof(struct disk_softc)); memset(sc, 0, sizeof(struct disk_softc)); f->f_devdata = (void *)sc; sc->sc_fd = fd; sc->sc_part = part; /* try to read disk label and partition table information */ lp = &sc->sc_label; lp->d_secsize = DEV_BSIZE; lp->d_secpercyl = 1; lp->d_npartitions = MAXPARTITIONS; lp->d_partitions[part].p_offset = 0; lp->d_partitions[part].p_size = 0x7fffffff; #ifdef arc error = diskstrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); if (error || cnt != DEV_BSIZE) { printf("%s: can't read disklabel, errno = %d\n", device, error); dealloc(sc, sizeof(struct disk_softc)); return ENXIO; } msg = getdisklabel(buf, lp); if (msg) { /* If no label, just assume 0 and return */ return 0; } /* * On arc, we can't open whole disk, but can open each partition with * OSLOADPARTITION like scsi(0)disk(0)rdisk()partition(1) etc. * Thus, we don't have to add offset of the MBR partition. */ /* XXX magic: partition 2 is whole NetBSD partition */ mbrp_off = lp->d_partitions[2].p_offset; for (i = 0; i < MAXPARTITIONS; i++) { if (lp->d_partitions[i].p_fstype != FS_UNUSED && lp->d_partitions[i].p_offset >= mbrp_off) lp->d_partitions[i].p_offset -= mbrp_off; } if (part >= lp->d_npartitions || lp->d_partitions[part].p_fstype == FS_UNUSED || lp->d_partitions[part].p_size == 0) { dealloc(sc, sizeof(struct disk_softc)); return ENXIO; } #endif return 0; } #ifndef LIBSA_NO_DEV_CLOSE int diskclose(struct open_file *f) { arcbios_Close(((struct disk_softc *)(f->f_devdata))->sc_fd); dealloc(f->f_devdata, sizeof(struct disk_softc)); f->f_devdata = NULL; return 0; } #endif
