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

https://bitbucket.org/abioy/linux
C Header | 65 lines | 42 code | 13 blank | 10 comment | 3 complexity | 1ed28a61aa3efa82dc8f53cffff7865f MD5 | raw file
Possible License(s): CC-BY-SA-3.0, GPL-2.0, LGPL-2.0, AGPL-1.0
  1. #ifndef _ASM_POWERPC_MMAN_H
  2. #define _ASM_POWERPC_MMAN_H
  3. #include <asm-generic/mman-common.h>
  4. /*
  5. * This program is free software; you can redistribute it and/or
  6. * modify it under the terms of the GNU General Public License
  7. * as published by the Free Software Foundation; either version
  8. * 2 of the License, or (at your option) any later version.
  9. */
  10. #define PROT_SAO 0x10 /* Strong Access Ordering */
  11. #define MAP_RENAME MAP_ANONYMOUS /* In SunOS terminology */
  12. #define MAP_NORESERVE 0x40 /* don't reserve swap pages */
  13. #define MAP_LOCKED 0x80
  14. #define MAP_GROWSDOWN 0x0100 /* stack-like segment */
  15. #define MAP_DENYWRITE 0x0800 /* ETXTBSY */
  16. #define MAP_EXECUTABLE 0x1000 /* mark it as an executable */
  17. #define MCL_CURRENT 0x2000 /* lock all currently mapped pages */
  18. #define MCL_FUTURE 0x4000 /* lock all additions to address space */
  19. #define MAP_POPULATE 0x8000 /* populate (prefault) pagetables */
  20. #define MAP_NONBLOCK 0x10000 /* do not block on IO */
  21. #define MAP_STACK 0x20000 /* give out an address that is best suited for process/thread stacks */
  22. #define MAP_HUGETLB 0x40000 /* create a huge page mapping */
  23. #ifdef __KERNEL__
  24. #ifdef CONFIG_PPC64
  25. #include <asm/cputable.h>
  26. #include <linux/mm.h>
  27. /*
  28. * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
  29. * here. How important is the optimization?
  30. */
  31. static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot)
  32. {
  33. return (prot & PROT_SAO) ? VM_SAO : 0;
  34. }
  35. #define arch_calc_vm_prot_bits(prot) arch_calc_vm_prot_bits(prot)
  36. static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
  37. {
  38. return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
  39. }
  40. #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
  41. static inline int arch_validate_prot(unsigned long prot)
  42. {
  43. if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
  44. return 0;
  45. if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
  46. return 0;
  47. return 1;
  48. }
  49. #define arch_validate_prot(prot) arch_validate_prot(prot)
  50. #endif /* CONFIG_PPC64 */
  51. #endif /* __KERNEL__ */
  52. #endif /* _ASM_POWERPC_MMAN_H */