arch/powerpc/include/asm/mman.h

   1 /*
   2  * This program is free software; you can redistribute it and/or
   3  * modify it under the terms of the GNU General Public License
   4  * as published by the Free Software Foundation; either version
   5  * 2 of the License, or (at your option) any later version.
   6  */
   7 #ifndef _ASM_POWERPC_MMAN_H
   8 #define _ASM_POWERPC_MMAN_H
   9
  10 #include <uapi/asm/mman.h>
  11
  12 #ifdef CONFIG_PPC64
  13
  14 #include <asm/cputable.h>
  15 #include <linux/mm.h>
  16
  17 /*
  18  * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
  19  * here.  How important is the optimization?
  20  */
  21 static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
  22                 unsigned long pkey)
  23 {
  24         return (prot & PROT_SAO) ? VM_SAO : 0;
  25 }
  26 #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
  27
  28 static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
  29 {
  30         return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
  31 }
  32 #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
  33
  34 static inline int arch_validate_prot(unsigned long prot)
  35 {
  36         if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
  37                 return 0;
  38         if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
  39                 return 0;
  40         return 1;
  41 }
  42 #define arch_validate_prot(prot) arch_validate_prot(prot)
  43
  44 #endif /* CONFIG_PPC64 */
  45 #endif  /* _ASM_POWERPC_MMAN_H */