/*
* 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;
/*
* 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;
}
/* 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;
}
