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xd.c revision 1.4 
      1 /*
      2  * $NetBSD: xd.c,v 1.4 2001/12/17 05:41:13 mhitch 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 __P((void *, int, daddr_t, size_t, void *, size_t *));
     45 static int xdopenclose __P((struct open_file *));
     46 static int xdioctl __P((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(aio)
     69 	void *aio;
     70 {
     71 	aio_save = aio;
     72 	aio_base = aio_save->offset;
     73 }
     74 
     75 /*
     76  * Kernel ist loaded from device and partition the kickstart
     77  * menu or boot priority has chosen:
     78  */
     79 
     80 int
     81 devopen(f, fname, file)
     82 	struct open_file *f;
     83 	const char *fname;
     84 	char **file;
     85 {
     86 	f->f_devdata = aio_save;
     87 	f->f_dev = &devsw[0];
     88 	*file = (char *)fname;
     89 	return 0;
     90 }
     91 
     92 /* tell kickstart to do the real work */
     93 
     94 static int
     95 xdstrategy (devd, flag, dblk, size, buf, rsize)
     96 	void	*devd;
     97 	int     flag;
     98 	daddr_t dblk;
     99 	size_t  size;
    100 	void    *buf;
    101 	size_t  *rsize;
    102 {
    103 	struct AmigaIO *aio = (struct AmigaIO *)devd;
    104 
    105 	if (flag != F_READ)
    106 		return EIO;
    107 
    108 	aio->cmd = Cmd_Rd;
    109 	aio->length = size;
    110 	aio->offset = aio_base + (dblk << 9);
    111 	aio->buf = buf;
    112 
    113 #ifdef XDDEBUG
    114 	printf("strategy called: %ld(%ld), %ld, 0x%lx\n",
    115 	    (long)dblk, (long)aio->offset, (long)size, (unsigned long)buf);
    116 #endif
    117 
    118 	DoIO(aio);
    119 
    120 #ifdef XDDEBUG
    121 	printf("strategy got err %ld, rsize %ld\n", (long)aio->err, (long)aio->actual);
    122 #endif
    123 
    124 	if (aio->err) {
    125 		*rsize = 0;
    126 		return EIO;
    127 	}
    128 
    129 	*rsize = aio->actual;
    130 	return 0;
    131 }
    132 
    133 
    134 /* nothing do do for these: */
    135 
    136 static int
    137 xdopenclose(f)
    138 	struct open_file *f;
    139 {
    140 	aio_save->offset = aio_base;	/* Restore original offset */
    141 	return 0;
    142 }
    143 
    144 static int
    145 xdioctl (f, cmd, data)
    146 	struct open_file *f;
    147 	u_long  cmd;
    148 	void    *data;
    149 {
    150 	return EIO;
    151 }
    152 
    153 #ifdef _PRIMARY_BOOT
    154 void
    155 xdreset()
    156 {
    157 	aio_save->offset = aio_base;	/* Restore original offset */
    158 }
    159 #endif
    160