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      1 /*
      2  * $NetBSD: xd.c,v 1.11 2021/02/25 03:42:14 rin 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 #if !defined(_PRIMARY_BOOT) || BOOTXX_FFS_VERSION == 1
     57 	FS_OPS(ufs),
     58 	FS_OPS(ustarfs),
     59 #endif
     60 #if !defined(_PRIMARY_BOOT) || BOOTXX_FFS_VERSION == 2
     61 	FS_OPS(ffsv2),
     62 #endif
     63 };
     64 
     65 int nfsys = sizeof(file_system)/sizeof(struct fs_ops);
     66 
     67 
     68 
     69 /* called from configure */
     70 
     71 void
     72 xdinit(void *aio)
     73 {
     74 	aio_save = aio;
     75 	aio_base = aio_save->offset;
     76 }
     77 
     78 /*
     79  * Kernel ist loaded from device and partition the kickstart
     80  * menu or boot priority has chosen:
     81  */
     82 
     83 int
     84 devopen(struct open_file *f, const char *fname, 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(void *devd, int flag, daddr_t dblk, size_t size, void *buf,
     96 	   size_t *rsize)
     97 {
     98 	struct AmigaIO *aio = (struct AmigaIO *)devd;
     99 
    100 	if (flag != F_READ)
    101 		return EIO;
    102 
    103 	aio->cmd = Cmd_Rd;
    104 	aio->length = size;
    105 	aio->offset = aio_base + (dblk << 9);
    106 	aio->buf = buf;
    107 
    108 #ifdef XDDEBUG
    109 	printf("strategy called: %ld(%ld), %ld, 0x%lx\n",
    110 	    (long)dblk, (long)aio->offset, (long)size, (unsigned long)buf);
    111 #endif
    112 
    113 	DoIO(aio);
    114 
    115 #ifdef XDDEBUG
    116 	printf("strategy got err %ld, rsize %ld\n", (long)aio->err, (long)aio->actual);
    117 #endif
    118 
    119 	if (aio->err) {
    120 		*rsize = 0;
    121 		return EIO;
    122 	}
    123 
    124 	*rsize = aio->actual;
    125 	return 0;
    126 }
    127 
    128 
    129 /* nothing do do for these: */
    130 
    131 static int
    132 xdopenclose(struct open_file *f)
    133 {
    134 	aio_save->offset = aio_base;	/* Restore original offset */
    135 	return 0;
    136 }
    137 
    138 static int
    139 xdioctl(struct open_file *f, u_long cmd, void *data)
    140 {
    141 	return EIO;
    142 }
    143 
    144 #ifdef _PRIMARY_BOOT
    145 void
    146 xdreset(void)
    147 {
    148 	aio_save->offset = aio_base;	/* Restore original offset */
    149 }
    150 #endif
    151