1/*-
2 * Copyright (c) 2006 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <efi.h>
31#include <efilib.h>
32
33struct entry {
34	EFI_HANDLE handle;
35	struct devsw *dev;
36	int unit;
37};
38
39struct entry *entry;
40int nentries;
41
42int
43efi_register_handles(struct devsw *sw, EFI_HANDLE *handles, int count)
44{
45	size_t sz;
46	int idx, unit;
47
48	idx = nentries;
49	nentries += count;
50	sz = nentries * sizeof(struct entry);
51	entry = (entry == NULL) ? malloc(sz) : realloc(entry, sz);
52	for (unit = 0; idx < nentries; idx++, unit++) {
53		entry[idx].handle = handles[unit];
54		entry[idx].dev = sw;
55		entry[idx].unit = unit;
56	}
57	return (0);
58}
59
60EFI_HANDLE
61efi_find_handle(struct devsw *dev, int unit)
62{
63	int idx;
64
65	for (idx = 0; idx < nentries; idx++) {
66		if (entry[idx].dev != dev)
67			continue;
68		if (entry[idx].unit != unit)
69			continue;
70		return (entry[idx].handle);
71	}
72	return (NULL);
73}
74
75int
76efi_handle_lookup(EFI_HANDLE h, struct devsw **dev, int *unit)
77{
78	int idx;
79
80	for (idx = 0; idx < nentries; idx++) {
81		if (entry[idx].handle != h)
82			continue;
83		if (dev != NULL)
84			*dev = entry[idx].dev;
85		if (unit != NULL)
86			*unit = entry[idx].unit;
87		return (0);
88	}
89	return (ENOENT);
90}
91