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
43 int
drm_mtrr_add(unsigned long offset,size_t size,int flags)44 drm_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
61 int
drm_mtrr_del(int handle,unsigned long offset,size_t size,int flags)62 drm_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