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  */
  41 static 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
  47 static 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
  53 static 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 */