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/* $OpenBSD: diskio.c,v 1.3 2008/03/08 16:52:28 jsing Exp $ */
/*
* Copyright (c) 2000 Opsycon AB (www.opsycon.se)
* Copyright (c) 2000 Rtmx, Inc (www.rtmx.com)
*
* 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 for Rtmx, Inc by
* Opsycon Open System Consulting AB, Sweden.
* 4. 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 <stand.h>
#include <sys/param.h>
#include <sys/disklabel.h>
#include <mips64/arcbios.h>
struct dio_softc {
int sc_fd; /* PROM file ID */
int sc_part; /* Disk partition number. */
struct disklabel sc_label; /* Disk label for this disk. */
};
int
diostrategy(void *devdata, int rw, daddr_t bn, u_int reqcnt, char *addr,
u_int *cnt)
{
struct dio_softc *sc = (struct dio_softc *)devdata;
struct partition *pp = &sc->sc_label.d_partitions[sc->sc_part];
int64_t offset;
int result;
offset = (pp->p_offset + bn) * DEV_BSIZE;
if ((Bios_Seek(sc->sc_fd, &offset, 0) < 0) ||
(Bios_Read(sc->sc_fd, addr, reqcnt, &result) < 0))
return (EIO);
*cnt = result;
return (0);
}
int
dioopen(struct open_file *f, ...)
{
char *ctlr;
int partition;
struct dio_softc *sc;
struct disklabel *lp;
int fd;
daddr_t labelsector;
va_list ap;
va_start(ap, f);
ctlr = va_arg(ap, char *);
partition = va_arg(ap, int);
if (partition >= MAXPARTITIONS)
return (ENXIO);
if (Bios_Open(ctlr, 0, &fd) < 0)
return (ENXIO);
sc = alloc(sizeof(struct dio_softc));
bzero(sc, sizeof(struct dio_softc));
f->f_devdata = (void *)sc;
sc->sc_fd = fd;
sc->sc_part = partition;
lp = &sc->sc_label;
lp->d_secsize = DEV_BSIZE;
lp->d_secpercyl = 1;
lp->d_npartitions = MAXPARTITIONS;
lp->d_partitions[partition].p_offset = 0;
lp->d_partitions[0].p_size = 0x7fff0000;
labelsector = LABELSECTOR;
#if 0
/* Try to read disk label and partition table information. */
i = diostrategy(sc, F_READ, (daddr_t)labelsector, DEV_BSIZE, buf, &cnt);
if (i == 0 && cnt == DEV_BSIZE)
msg = getdisklabel(buf, lp);
else
msg = "rd err";
if (msg) {
printf("%s: %s\n", ctlr, msg);
return (ENXIO);
}
#endif
return (0);
}
int
dioclose(struct open_file *f)
{
Bios_Close(((struct dio_softc *)f->f_devdata)->sc_fd);
free(f->f_devdata, sizeof(struct dio_softc));
f->f_devdata = NULL;
return (0);
}
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