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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. 

  2. #define _ASM_POWERPC_MMAN_H
    3. 

  3. 

  4. #include <asm-generic/mman-common.h>
    5. 

  5. 

  6. /*
    7. 

  7.  * This program is free software; you can redistribute it and/or
    8. 

  8.  * modify it under the terms of the GNU General Public License
    9. 

  9.  * as published by the Free Software Foundation; either version
    10. 

  10.  * 2 of the License, or (at your option) any later version.
    11. 

  11.  */
    12. 

  12. 

  13. #define PROT_SAO	0x10		/* Strong Access Ordering */
    14. 

  14. 

  15. #define MAP_RENAME      MAP_ANONYMOUS   /* In SunOS terminology */
    16. 

  16. #define MAP_NORESERVE   0x40            /* don't reserve swap pages */
    17. 

  17. #define MAP_LOCKED	0x80
    18. 

  18. 

  19. #define MAP_GROWSDOWN	0x0100		/* stack-like segment */
    20. 

  20. #define MAP_DENYWRITE	0x0800		/* ETXTBSY */
    21. 

  21. #define MAP_EXECUTABLE	0x1000		/* mark it as an executable */
    22. 

  22. 

  23. #define MCL_CURRENT     0x2000          /* lock all currently mapped pages */
    24. 

  24. #define MCL_FUTURE      0x4000          /* lock all additions to address space */
    25. 

  25. 

  26. #define MAP_POPULATE	0x8000		/* populate (prefault) pagetables */
    27. 

  27. #define MAP_NONBLOCK	0x10000		/* do not block on IO */
    28. 

  28. #define MAP_STACK	0x20000		/* give out an address that is best suited for process/thread stacks */
    29. 

  29. #define MAP_HUGETLB	0x40000		/* create a huge page mapping */
    30. 

  30. 

  31. #ifdef __KERNEL__
    32. 

  32. #ifdef CONFIG_PPC64
    33. 

  33. 

  34. #include <asm/cputable.h>
    35. 

  35. #include <linux/mm.h>
    36. 

  36. 

  37. /*
    38. 

  38.  * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
    39. 

  39.  * here.  How important is the optimization?
    40. 

  40.  */
    41. 

  41. static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot)
    42. 

  42. {
    43. 

  43. 	return (prot & PROT_SAO) ? VM_SAO : 0;
    44. 

  44. }
    45. 

  45. #define arch_calc_vm_prot_bits(prot) arch_calc_vm_prot_bits(prot)
    46. 

  46. 

  47. static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
    48. 

  48. {
    49. 

  49. 	return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
    50. 

  50. }
    51. 

  51. #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
    52. 

  52. 

  53. static inline int arch_validate_prot(unsigned long prot)
    54. 

  54. {
    55. 

  55. 	if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
    56. 

  56. 		return 0;
    57. 

  57. 	if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
    58. 

  58. 		return 0;
    59. 

  59. 	return 1;
    60. 

  60. }
    61. 

  61. #define arch_validate_prot(prot) arch_validate_prot(prot)
    62. 

  62. 

  63. #endif /* CONFIG_PPC64 */
    64. 

  64. #endif /* __KERNEL__ */
    65. 

  65. #endif	/* _ASM_POWERPC_MMAN_H */
    66. 

  66.