1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1994-1996, 2002-2003 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <sys/param.h>
30 #include <sys/vnode.h>
31 #include <sys/fs/ufs_fsdir.h>
32 #include <sys/fs/ufs_fs.h>
33 #include <sys/fs/ufs_inode.h>
34 #include <sys/sysmacros.h>
35 #include <sys/promif.h>
36 #include <sys/filep.h>
37 #include <sys/salib.h>
38
39 static char prom_dev_type = 0;
40
41 /*
42 * unix root slice offset for PROMS that do
43 * not know about fdisk partitions or Solaris
44 * slices.
45 * the default is 0 for machines with proms that
46 * do know how to interpret solaris slices.
47 */
48 unsigned long unix_startblk = 0;
49
50 /*
51 * The various flavors of PROM make this grotesque.
52 */
53 int
diskread(fileid_t * filep)54 diskread(fileid_t *filep)
55 {
56 int err;
57 devid_t *devp;
58 uint_t blocknum;
59
60 /* add in offset of root slice */
61 blocknum = filep->fi_blocknum + unix_startblk;
62
63 devp = filep->fi_devp;
64
65 err = prom_seek(devp->di_dcookie,
66 (unsigned long long)blocknum * (unsigned long long)DEV_BSIZE);
67 if (err == -1) {
68 printf("Seek error at block %x\n", blocknum);
69 return (-1);
70 }
71
72 if ((err = prom_read(devp->di_dcookie, filep->fi_memp, filep->fi_count,
73 blocknum, prom_dev_type)) != filep->fi_count) {
74 printf("Short read. 0x%x chars read\n", err);
75 return (-1);
76 }
77
78 return (0);
79 }
80