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devopen.c revision 1.3 
      1 /*	$NetBSD: devopen.c,v 1.3 2002/04/30 13:09:05 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1999 Tsubai Masanari.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <lib/libkern/libkern.h>
     30 #include <lib/libsa/stand.h>
     31 #include <lib/libsa/ufs.h>
     32 #include <lib/libsa/ustarfs.h>
     33 
     34 #include <machine/romcall.h>
     35 
     36 #ifdef BOOT_DEBUG
     37 # define DPRINTF(x) printf x
     38 #else
     39 # define DPRINTF(x)
     40 #endif
     41 
     42 int dkopen __P((struct open_file *, ...));
     43 int dkclose __P((struct open_file *));
     44 int dkstrategy __P((void *, int, daddr_t, size_t, void *, size_t *));
     45 
     46 struct devsw devsw[] = {
     47 	{ "dk", dkstrategy, dkopen, dkclose, noioctl }
     48 };
     49 int ndevs = sizeof(devsw) / sizeof(devsw[0]);
     50 
     51 struct fs_ops file_system[] = {
     52 	{ ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat },
     53 	{ ustarfs_open, ustarfs_close, ustarfs_read, ustarfs_write,
     54 	    ustarfs_seek, ustarfs_stat }
     55 };
     56 int nfsys = sizeof(file_system) / sizeof(file_system[0]);
     57 
     58 struct romdev {
     59 	int fd;
     60 } romdev;
     61 
     62 int
     63 devopen(f, fname, file)
     64 	struct open_file *f;
     65 	const char *fname;
     66 	char **file;	/* out */
     67 {
     68 	int fd;
     69 	char devname[32];
     70 	char *cp;
     71 
     72 	DPRINTF(("devopen: %s\n", fname));
     73 
     74 	strcpy(devname, fname);
     75 	cp = strchr(devname, ')') + 1;
     76 	*cp = 0;
     77 	fd = rom_open(devname, 0);
     78 
     79 	DPRINTF(("devname = %s, fd = %d\n", devname, fd));
     80 	if (fd == -1)
     81 		return -1;
     82 
     83 	romdev.fd = fd;
     84 
     85 	f->f_dev = devsw;
     86 	f->f_devdata = &romdev;
     87 	*file = strchr(fname, ')') + 1;
     88 
     89 	return 0;
     90 }
     91 
     92 int
     93 dkopen(struct open_file *f, ...)
     94 {
     95 	DPRINTF(("dkopen\n"));
     96 	return 0;
     97 }
     98 
     99 int
    100 dkclose(f)
    101 	struct open_file *f;
    102 {
    103 	struct romdev *dev = f->f_devdata;
    104 
    105 	DPRINTF(("dkclose\n"));
    106 	rom_close(dev->fd);
    107 	return 0;
    108 }
    109 
    110 int
    111 dkstrategy(devdata, rw, blk, size, buf, rsize)
    112 	void *devdata;
    113 	int rw;
    114 	daddr_t blk;
    115 	size_t size;
    116 	void *buf;
    117 	size_t *rsize;	/* out: number of bytes transfered */
    118 {
    119 	struct romdev *dev = devdata;
    120 
    121 	/* XXX should use partition offset */
    122 
    123 	rom_lseek(dev->fd, blk * 512, 0);
    124 	rom_read(dev->fd, buf, size);
    125 	*rsize = size;
    126 	return 0;
    127 }
    128