source: mainline/kernel/generic/include/mm/mm.h@ 4b1c7c6f

Last change on this file since 4b1c7c6f was 4b1c7c6f, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 7 years ago

Clean up PAGE_* flags.

Remove "nop flags", they are confusing for readers and any benefit they would
gain in self-documentation they lose in being used inconsistently.

Remove "PAGE_READ", the only place it's used meaningfully is the incomplete
RISC-V implementation, and most call sites assume read is implied.

  • Property mode set to 100644
File size: 2.0 KB
Line 
1/*
2 * Copyright (c) 2007 Martin Decky
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 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - 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 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup genericmm
30 * @{
31 */
32/** @file
33 */
34
35#ifndef KERN_MM_H_
36#define KERN_MM_H_
37
38#define PAGE_CACHEABLE_SHIFT 0
39#define PAGE_NOT_PRESENT_SHIFT 1
40#define PAGE_USER_SHIFT 2
41#define PAGE_WRITE_SHIFT 4
42#define PAGE_EXEC_SHIFT 5
43#define PAGE_GLOBAL_SHIFT 6
44
45#define PAGE_CACHEABLE (1 << PAGE_CACHEABLE_SHIFT)
46#define PAGE_NOT_PRESENT (1 << PAGE_NOT_PRESENT_SHIFT)
47#define PAGE_USER (1 << PAGE_USER_SHIFT)
48#define PAGE_WRITE (1 << PAGE_WRITE_SHIFT)
49#define PAGE_EXEC (1 << PAGE_EXEC_SHIFT)
50#define PAGE_GLOBAL (1 << PAGE_GLOBAL_SHIFT)
51
52#endif
53
54/** @}
55 */
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