xref: /titanic_51/usr/src/uts/intel/ia32/os/bootdev.c (revision df0345f7d6cc87cde9e532e8362f1aca053d98cc)
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 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #include <sys/modctl.h>
28 #include <sys/sunddi.h>
29 
30 /* internal global data */
31 static struct modlmisc modlmisc = {
32 	&mod_miscops, "bootdev misc module"
33 };
34 
35 static struct modlinkage modlinkage = {
36 	MODREV_1, (void *)&modlmisc, NULL
37 };
38 
39 int
40 _init()
41 {
42 	return (mod_install(&modlinkage));
43 }
44 
45 int
46 _fini()
47 {
48 	return (mod_remove(&modlinkage));
49 }
50 
51 int
52 _info(struct modinfo *modinfop)
53 {
54 	return (mod_info(&modlinkage, modinfop));
55 }
56 
57 /*
58  * convert a prom device path to an equivalent path in /devices
59  * Does not deal with aliases.  Does deal with pathnames which
60  * are not fully qualified.  This routine is generalized
61  * to work across several flavors of OBP
62  */
63 int
64 i_promname_to_devname(char *prom_name, char *ret_buf)
65 {
66 	if (prom_name == NULL || ret_buf == NULL ||
67 	    (strlen(prom_name) >= MAXPATHLEN)) {
68 		return (EINVAL);
69 	}
70 	if (i_ddi_prompath_to_devfspath(prom_name, ret_buf) != DDI_SUCCESS)
71 		return (EINVAL);
72 
73 	return (0);
74 }
75 
76 /*
77  * If bootstring contains a device path, we need to convert to a format
78  * the prom will understand.  To do so, we convert the existing path to
79  * a prom-compatible path and return the value of new_path.  If the
80  * caller specifies new_path as NULL, we allocate an appropriately
81  * sized new_path on behalf of the caller.  If the caller invokes this
82  * function with new_path = NULL, they must do so from a context in
83  * which it is safe to perform a sleeping memory allocation.
84  *
85  * NOTE: Intel does not have a real PROM, so the implementation
86  *       simply returns a copy of the string passed in.
87  */
88 char *
89 i_convert_boot_device_name(char *cur_path, char *new_path, size_t *len)
90 {
91 	if (new_path != NULL) {
92 		(void) snprintf(new_path, *len, "%s", cur_path);
93 		return (new_path);
94 	} else {
95 		*len = strlen(cur_path) + 1;
96 		new_path = kmem_alloc(*len, KM_SLEEP);
97 		(void) snprintf(new_path, *len, "%s", cur_path);
98 		return (new_path);
99 	}
100 }
101