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/* $OpenBSD: ct.c,v 1.2 1998/07/08 21:34:33 mickey Exp $ */
/* $NOWHERE: ct.c,v 2.2 1998/06/22 18:41:34 mickey Exp $ */
/*
* Copyright (c) 1998 Michael Shalayeff
* All rights reserved.
*
* 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 Michael Shalayeff.
* 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.
*/
/*
* Copyright 1996 1995 by Open Software Foundation, Inc.
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation.
*
* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "libsa.h"
#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/reboot.h>
#include <machine/pdc.h>
#include <machine/iodc.h>
#include <machine/iomod.h>
#include "dev_hppa.h"
iodcio_t ctiodc; /* cartridge tape IODC entry point */
int ctcode[IODC_MAXSIZE/sizeof(int)];
/* hp800-specific comments:
*
* Tape driver ALWAYS uses "Alternate Boot Device", which is assumed to ALWAYS
* be the boot device in pagezero (meaning we booted from it).
*
* NOTE about skipping file, below: It's assumed that a read gets 2k (a page).
* This is done because, even though the cartridge tape has record sizes of 1k,
* and an EOF takes one record, reads through the IODC must be in 2k chunks,
* and must start on a 2k-byte boundary. This means that ANY TAPE FILE TO BE
* SKIPPED OVER IS GOING TO HAVE TO BE AN ODD NUMBER OF 1 KBYTE RECORDS so the
* read of the subsequent file can start on a 2k boundary. If a real error
* occurs, the record count is reset below, so this isn't a problem.
*/
int ctbyteno; /* block number on tape to access next */
int ctworking; /* flag: have we read anything successfully? */
int
#ifdef __STDC__
ctopen(struct open_file *f, ...)
#else
ctopen(f)
struct open_file *f;
#endif
{
struct hppa_dev *dp = f->f_devdata;
int i, ret, part = B_PARTITION(dp->bootdev);
if (ctiodc == 0) {
if ((ret = (*pdc)(PDC_IODC, PDC_IODC_READ, pdcbuf, ctdev.pz_hpa,
IODC_IO, ctcode, IODC_MAXSIZE)) < 0) {
printf("ct: device ENTRY_IO Read ret'd %d\n", ret);
return (EIO);
} else
ctdev.pz_iodc_io = ctiodc = (iodcio_t) ctcode;
}
if (ctiodc != NULL)
if ((ret = (*ctiodc)(ctdev.pz_hpa, IODC_IO_BOOTIN, ctdev.pz_spa,
ctdev.pz_layers, pdcbuf,0, btbuf,0,0)) < 0)
printf("ct: device rewind ret'd %d\n", ret);
ctbyteno = 0;
for (i = part; --i >= 0; ) {
ctworking = 0;
for (;;) {
ret = iodc_rw(btbuf, ctbyteno, IONBPG, F_READ, &ctdev);
ctbyteno += IONBPG;
if (ret <= 0)
break;
ctworking = 1;
}
if (ret < 0 && (ret != -4 || !ctworking)) {
printf("ct: error %d after %d %d-byte records\n",
ret, ctbyteno >> IOPGSHIFT, IONBPG);
ctbyteno = 0;
ctworking = 0;
return (EIO);
}
}
ctworking = 0;
return (0);
}
/*ARGSUSED*/
int
ctclose(f)
struct open_file *f;
{
ctbyteno = 0;
ctworking = 0;
return 0;
}
int
ctstrategy(devdata, rw, dblk, size, buf, rsize)
void *devdata;
int rw;
daddr_t dblk;
size_t size;
void *buf;
size_t *rsize;
{
int ret;
if ((ret = iodc_rw(buf, ctbyteno, size, rw, &ctdev)) < 0) {
if (ret == -4 && ctworking)
ret = 0;
ctworking = 0;
} else {
ctworking = 1;
ctbyteno += ret;
}
return (ret);
}
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