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xd.c revision 1.10 
      1 /*
      2  * $NetBSD: xd.c,v 1.10 2009/03/14 21:04:04 dsl 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 <lib/libsa/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 struct devsw devsw[] = {
     52         { "xd", xdstrategy, (void *)xdopenclose, (void *)xdopenclose, xdioctl }
     53 };
     54 
     55 struct fs_ops file_system[] = {
     56 	FS_OPS(ufs),
     57 	FS_OPS(ustarfs),
     58 };
     59 
     60 int nfsys = sizeof(file_system)/sizeof(struct fs_ops);
     61 
     62 
     63 
     64 /* called from configure */
     65 
     66 void
     67 xdinit(void *aio)
     68 {
     69 	aio_save = aio;
     70 	aio_base = aio_save->offset;
     71 }
     72 
     73 /*
     74  * Kernel ist loaded from device and partition the kickstart
     75  * menu or boot priority has chosen:
     76  */
     77 
     78 int
     79 devopen(struct open_file *f, const char *fname, char **file)
     80 {
     81 	f->f_devdata = aio_save;
     82 	f->f_dev = &devsw[0];
     83 	*file = (char *)fname;
     84 	return 0;
     85 }
     86 
     87 /* tell kickstart to do the real work */
     88 
     89 static int
     90 xdstrategy(void *devd, int flag, daddr_t dblk, size_t size, void *buf,
     91 	   size_t *rsize)
     92 {
     93 	struct AmigaIO *aio = (struct AmigaIO *)devd;
     94 
     95 	if (flag != F_READ)
     96 		return EIO;
     97 
     98 	aio->cmd = Cmd_Rd;
     99 	aio->length = size;
    100 	aio->offset = aio_base + (dblk << 9);
    101 	aio->buf = buf;
    102 
    103 #ifdef XDDEBUG
    104 	printf("strategy called: %ld(%ld), %ld, 0x%lx\n",
    105 	    (long)dblk, (long)aio->offset, (long)size, (unsigned long)buf);
    106 #endif
    107 
    108 	DoIO(aio);
    109 
    110 #ifdef XDDEBUG
    111 	printf("strategy got err %ld, rsize %ld\n", (long)aio->err, (long)aio->actual);
    112 #endif
    113 
    114 	if (aio->err) {
    115 		*rsize = 0;
    116 		return EIO;
    117 	}
    118 
    119 	*rsize = aio->actual;
    120 	return 0;
    121 }
    122 
    123 
    124 /* nothing do do for these: */
    125 
    126 static int
    127 xdopenclose(struct open_file *f)
    128 {
    129 	aio_save->offset = aio_base;	/* Restore original offset */
    130 	return 0;
    131 }
    132 
    133 static int
    134 xdioctl(struct open_file *f, u_long cmd, void *data)
    135 {
    136 	return EIO;
    137 }
    138 
    139 #ifdef _PRIMARY_BOOT
    140 void
    141 xdreset(void)
    142 {
    143 	aio_save->offset = aio_base;	/* Restore original offset */
    144 }
    145 #endif
    146