1/*-
2 *Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 *    Rickard E. (Rik) Faith <faith@valinux.com>
27 *    Gareth Hughes <gareth@valinux.com>
28 *
29 */
30
31/** @file drm_memory.c
32 * Wrappers for MTRR management support.
33 */
34
35#include <sys/types.h>
36#include <lib/libkern/libkern.h>
37#include <sys/memrange.h>
38
39#if !defined(__amd64__) && !defined(__i386__)
40#define DRM_NO_MTRR	1
41#endif
42
43int
44drm_mtrr_add(unsigned long offset, size_t size, int flags)
45{
46#ifndef DRM_NO_MTRR
47	int act;
48	struct mem_range_desc mrdesc;
49
50	mrdesc.mr_base = offset;
51	mrdesc.mr_len = size;
52	mrdesc.mr_flags = flags;
53	act = MEMRANGE_SET_UPDATE;
54	strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner));
55	return mem_range_attr_set(&mrdesc, &act);
56#else
57	return 0;
58#endif
59}
60
61int
62drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags)
63{
64#ifndef DRM_NO_MTRR
65	int act;
66	struct mem_range_desc mrdesc;
67
68	mrdesc.mr_base = offset;
69	mrdesc.mr_len = size;
70	mrdesc.mr_flags = flags;
71	act = MEMRANGE_SET_REMOVE;
72	strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner));
73	return mem_range_attr_set(&mrdesc, &act);
74#else
75	return 0;
76#endif
77}
78