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devopen.c revision 1.6 
      1 /*	$NetBSD: devopen.c,v 1.6 2004/09/04 13:43:12 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 printf
     38 #else
     39 # define DPRINTF while (0) printf
     40 #endif
     41 
     42 int dkopen(struct open_file *, ...);
     43 int dkclose(struct open_file *);
     44 int dkstrategy(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(struct open_file *f, const char *fname, char **file)
     64 {
     65 	int fd;
     66 	char devname[32];
     67 	char *cp;
     68 
     69 	DPRINTF("devopen: %s\n", fname);
     70 
     71 	strcpy(devname, fname);
     72 	cp = strchr(devname, ')') + 1;
     73 	*cp = 0;
     74 	fd = rom_open(devname, 0);
     75 
     76 	DPRINTF("devname = %s, fd = %d\n", devname, fd);
     77 	if (fd == -1)
     78 		return -1;
     79 
     80 	romdev.fd = fd;
     81 
     82 	f->f_dev = devsw;
     83 	f->f_devdata = &romdev;
     84 	*file = strchr(fname, ')') + 1;
     85 
     86 	return 0;
     87 }
     88 
     89 int
     90 dkopen(struct open_file *f, ...)
     91 {
     92 
     93 	DPRINTF("dkopen\n");
     94 	return 0;
     95 }
     96 
     97 int
     98 dkclose(struct open_file *f)
     99 {
    100 	struct romdev *dev = f->f_devdata;
    101 
    102 	DPRINTF("dkclose\n");
    103 	rom_close(dev->fd);
    104 	return 0;
    105 }
    106 
    107 int
    108 dkstrategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf,
    109     size_t *rsize)
    110 {
    111 	struct romdev *dev = devdata;
    112 
    113 	/* XXX should use partition offset */
    114 
    115 	rom_lseek(dev->fd, blk * 512, 0);
    116 	rom_read(dev->fd, buf, size);
    117 	*rsize = size;
    118 	return 0;
    119 }
    120