LXR linux/arch/powerpc/include/asm/mman.h

   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 */
  66