include/asm-powerpc/mman.h

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