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xd.c revision 1.5 
      1 /*
      2  * $NetBSD: xd.c,v 1.5 2002/01/26 13:18:58 aymeric Exp $
      3  *
      4  * Copyright (c) 1996 Ignatios Souvatzis.
      5  * Copyright (c) 1995 Waldi Ravens.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *        This product includes software developed by Waldi Ravens.
     19  * 4. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/types.h>
     35 
     36 #include <stand.h>
     37 #include <ufs.h>
     38 #include <ustarfs.h>
     39 
     40 #include "samachdep.h"
     41 #include "amigaio.h"
     42 #include "libstubs.h"
     43 
     44 static int xdstrategy(void *, int, daddr_t, size_t, void *, size_t *);
     45 static int xdopenclose(struct open_file *);
     46 static int xdioctl(struct open_file *, u_long, void *);
     47 
     48 u_int32_t aio_base;
     49 static struct AmigaIO *aio_save;
     50 
     51 static struct devsw devsw[] = {
     52         { "xd", xdstrategy, (void *)xdopenclose, (void *)xdopenclose, xdioctl }
     53 };
     54 
     55 struct fs_ops file_system[] = {
     56 	{ ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat },
     57 	{ ustarfs_open, ustarfs_close, ustarfs_read, ustarfs_write, ustarfs_seek,
     58 	  ustarfs_stat },
     59 };
     60 
     61 int nfsys = sizeof(file_system)/sizeof(struct fs_ops);
     62 
     63 
     64 
     65 /* called from configure */
     66 
     67 void
     68 xdinit(void *aio)
     69 {
     70 	aio_save = aio;
     71 	aio_base = aio_save->offset;
     72 }
     73 
     74 /*
     75  * Kernel ist loaded from device and partition the kickstart
     76  * menu or boot priority has chosen:
     77  */
     78 
     79 int
     80 devopen(f, fname, file)
     81 	struct open_file *f;
     82 	const char *fname;
     83 	char **file;
     84 {
     85 	f->f_devdata = aio_save;
     86 	f->f_dev = &devsw[0];
     87 	*file = (char *)fname;
     88 	return 0;
     89 }
     90 
     91 /* tell kickstart to do the real work */
     92 
     93 static int
     94 xdstrategy(void *devd, int flag, daddr_t dblk, size_t size, void *buf,
     95 	   size_t *rsize)
     96 {
     97 	struct AmigaIO *aio = (struct AmigaIO *)devd;
     98 
     99 	if (flag != F_READ)
    100 		return EIO;
    101 
    102 	aio->cmd = Cmd_Rd;
    103 	aio->length = size;
    104 	aio->offset = aio_base + (dblk << 9);
    105 	aio->buf = buf;
    106 
    107 #ifdef XDDEBUG
    108 	printf("strategy called: %ld(%ld), %ld, 0x%lx\n",
    109 	    (long)dblk, (long)aio->offset, (long)size, (unsigned long)buf);
    110 #endif
    111 
    112 	DoIO(aio);
    113 
    114 #ifdef XDDEBUG
    115 	printf("strategy got err %ld, rsize %ld\n", (long)aio->err, (long)aio->actual);
    116 #endif
    117 
    118 	if (aio->err) {
    119 		*rsize = 0;
    120 		return EIO;
    121 	}
    122 
    123 	*rsize = aio->actual;
    124 	return 0;
    125 }
    126 
    127 
    128 /* nothing do do for these: */
    129 
    130 static int
    131 xdopenclose(struct open_file *f)
    132 {
    133 	aio_save->offset = aio_base;	/* Restore original offset */
    134 	return 0;
    135 }
    136 
    137 static int
    138 xdioctl(struct open_file *f, u_long cmd, void *data)
    139 {
    140 	return EIO;
    141 }
    142 
    143 #ifdef _PRIMARY_BOOT
    144 void
    145 xdreset(void)
    146 {
    147 	aio_save->offset = aio_base;	/* Restore original offset */
    148 }
    149 #endif
    150