Home | History | Annotate | Line # | Download | only in boot
xd.c revision 1.3 
      1 /*
      2  * $NetBSD: xd.c,v 1.3 1997/02/01 01:46:28 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 
     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 };
     58 
     59 int nfsys = sizeof(file_system)/sizeof(struct fs_ops);
     60 
     61 
     62 
     63 /* called from configure */
     64 
     65 void
     66 xdinit(aio)
     67 	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(f, fname, file)
     80 	struct open_file *f;
     81 	const char *fname;
     82 	char **file;
     83 {
     84 	f->f_devdata = aio_save;
     85 	f->f_dev = &devsw[0];
     86 	*file = (char *)fname;
     87 	return 0;
     88 }
     89 
     90 /* tell kickstart to do the real work */
     91 
     92 static int
     93 xdstrategy (devd, flag, dblk, size, buf, rsize)
     94 	void	*devd;
     95 	int     flag;
     96 	daddr_t dblk;
     97 	size_t  size;
     98 	void    *buf;
     99 	size_t  *rsize;
    100 {
    101 	struct AmigaIO *aio = (struct AmigaIO *)devd;
    102 
    103 	if (flag != F_READ)
    104 		return EIO;
    105 
    106 	aio->cmd = Cmd_Rd;
    107 	aio->length = size;
    108 	aio->offset = aio_base + (dblk << 9);
    109 	aio->buf = buf;
    110 
    111 #ifdef XDDEBUG
    112 	printf("strategy called: %ld(%ld), %ld, 0x%lx\n",
    113 	    (long)dblk, (long)aio->offset, (long)size, (unsigned long)buf);
    114 #endif
    115 
    116 	DoIO(aio);
    117 
    118 #ifdef XDDEBUG
    119 	printf("strategy got err %ld, rsize %ld\n", aio->err, aio->actual);
    120 #endif
    121 
    122 	if (aio->err) {
    123 		*rsize = 0;
    124 		return EIO;
    125 	}
    126 
    127 	*rsize = aio->actual;
    128 	return 0;
    129 }
    130 
    131 
    132 /* nothing do do for these: */
    133 
    134 static int
    135 xdopenclose(f)
    136 	struct open_file *f;
    137 {
    138 	return 0;
    139 }
    140 
    141 static int
    142 xdioctl (f, cmd, data)
    143 	struct open_file *f;
    144 	u_long  cmd;
    145 	void    *data;
    146 {
    147 	return EIO;
    148 }
    149