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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1#ifndef _ASM_POWERPC_MMAN_H
2#define _ASM_POWERPC_MMAN_H
3
4#include <asm-generic/mman-common.h>
5
6/*
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#define PROT_SAO 0x10 /* Strong Access Ordering */
14
15#define MAP_RENAME MAP_ANONYMOUS /* In SunOS terminology */
16#define MAP_NORESERVE 0x40 /* don't reserve swap pages */
17#define MAP_LOCKED 0x80
18
19#define MAP_GROWSDOWN 0x0100 /* stack-like segment */
20#define MAP_DENYWRITE 0x0800 /* ETXTBSY */
21#define MAP_EXECUTABLE 0x1000 /* mark it as an executable */
22
23#define MCL_CURRENT 0x2000 /* lock all currently mapped pages */
24#define MCL_FUTURE 0x4000 /* lock all additions to address space */
25
26#define MAP_POPULATE 0x8000 /* populate (prefault) pagetables */
27#define MAP_NONBLOCK 0x10000 /* do not block on IO */
28#define MAP_STACK 0x20000 /* give out an address that is best suited for process/thread stacks */
29#define MAP_HUGETLB 0x40000 /* create a huge page mapping */
30
31#ifdef __KERNEL__
32#ifdef CONFIG_PPC64
33
34#include <asm/cputable.h>
35#include <linux/mm.h>
36
37/*
38 * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
39 * here. How important is the optimization?
40 */
41static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot)
42{
43 return (prot & PROT_SAO) ? VM_SAO : 0;
44}
45#define arch_calc_vm_prot_bits(prot) arch_calc_vm_prot_bits(prot)
46
47static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
48{
49 return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
50}
51#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
52
53static inline int arch_validate_prot(unsigned long prot)
54{
55 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
56 return 0;
57 if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
58 return 0;
59 return 1;
60}
61#define arch_validate_prot(prot) arch_validate_prot(prot)
62
63#endif /* CONFIG_PPC64 */
64#endif /* __KERNEL__ */
65#endif /* _ASM_POWERPC_MMAN_H */