150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
/*
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* $NetBSD: xd.c,v 1.5 2002/01/26 13:18:58 aymeric Exp $
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*
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* Copyright (c) 1996 Ignatios Souvatzis.
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* Copyright (c) 1995 Waldi Ravens.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Waldi Ravens.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <stand.h>
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#include <ufs.h>
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#include <ustarfs.h>
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#include "samachdep.h"
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#include "amigaio.h"
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#include "libstubs.h"
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static int xdstrategy(void *, int, daddr_t, size_t, void *, size_t *);
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static int xdopenclose(struct open_file *);
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static int xdioctl(struct open_file *, u_long, void *);
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u_int32_t aio_base;
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static struct AmigaIO *aio_save;
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static struct devsw devsw[] = {
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{ "xd", xdstrategy, (void *)xdopenclose, (void *)xdopenclose, xdioctl }
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};
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struct fs_ops file_system[] = {
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{ ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat },
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{ ustarfs_open, ustarfs_close, ustarfs_read, ustarfs_write, ustarfs_seek,
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ustarfs_stat },
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};
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int nfsys = sizeof(file_system)/sizeof(struct fs_ops);
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/* called from configure */
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void
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xdinit(void *aio)
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{
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aio_save = aio;
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aio_base = aio_save->offset;
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}
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/*
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* Kernel ist loaded from device and partition the kickstart
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* menu or boot priority has chosen:
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*/
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int
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devopen(f, fname, file)
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struct open_file *f;
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const char *fname;
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char **file;
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{
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f->f_devdata = aio_save;
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f->f_dev = &devsw[0];
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*file = (char *)fname;
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return 0;
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}
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/* tell kickstart to do the real work */
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static int
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xdstrategy(void *devd, int flag, daddr_t dblk, size_t size, void *buf,
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size_t *rsize)
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{
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struct AmigaIO *aio = (struct AmigaIO *)devd;
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if (flag != F_READ)
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return EIO;
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aio->cmd = Cmd_Rd;
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aio->length = size;
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aio->offset = aio_base + (dblk << 9);
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aio->buf = buf;
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#ifdef XDDEBUG
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printf("strategy called: %ld(%ld), %ld, 0x%lx\n",
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(long)dblk, (long)aio->offset, (long)size, (unsigned long)buf);
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#endif
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DoIO(aio);
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#ifdef XDDEBUG
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printf("strategy got err %ld, rsize %ld\n", (long)aio->err, (long)aio->actual);
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#endif
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if (aio->err) {
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*rsize = 0;
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return EIO;
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}
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*rsize = aio->actual;
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return 0;
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}
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/* nothing do do for these: */
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static int
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xdopenclose(struct open_file *f)
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{
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aio_save->offset = aio_base; /* Restore original offset */
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return 0;
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}
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static int
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xdioctl(struct open_file *f, u_long cmd, void *data)
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{
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return EIO;
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}
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#ifdef _PRIMARY_BOOT
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void
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xdreset(void)
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{
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aio_save->offset = aio_base; /* Restore original offset */
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}
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#endif
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