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asm
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hugetlb.h

hugetlb.h 2.1 KB
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  1. #ifndef _ASM_SPARC64_HUGETLB_H
    2. 

  2. #define _ASM_SPARC64_HUGETLB_H
    3. 

  3. 

  4. #include <asm/page.h>
    5. 

  5. 

  6. 

  7. void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
    8. 

  8. 		     pte_t *ptep, pte_t pte);
    9. 

  9. 

  10. pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
    11. 

  11. 			      pte_t *ptep);
    12. 

  12. 

  13. static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
    14. 

  14. {
    15. 

  15. }
    16. 

  16. 

  17. static inline int is_hugepage_only_range(struct mm_struct *mm,
    18. 

  18. 					 unsigned long addr,
    19. 

  19. 					 unsigned long len) {
    20. 

  20. 	return 0;
    21. 

  21. }
    22. 

  22. 

  23. /*
    24. 

  24.  * If the arch doesn't supply something else, assume that hugepage
    25. 

  25.  * size aligned regions are ok without further preparation.
    26. 

  26.  */
    27. 

  27. static inline int prepare_hugepage_range(struct file *file,
    28. 

  28. 			unsigned long addr, unsigned long len)
    29. 

  29. {
    30. 

  30. 	if (len & ~HPAGE_MASK)
    31. 

  31. 		return -EINVAL;
    32. 

  32. 	if (addr & ~HPAGE_MASK)
    33. 

  33. 		return -EINVAL;
    34. 

  34. 	return 0;
    35. 

  35. }
    36. 

  36. 

  37. static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
    38. 

  38. 					  unsigned long addr, unsigned long end,
    39. 

  39. 					  unsigned long floor,
    40. 

  40. 					  unsigned long ceiling)
    41. 

  41. {
    42. 

  42. 	free_pgd_range(tlb, addr, end, floor, ceiling);
    43. 

  43. }
    44. 

  44. 

  45. static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
    46. 

  46. 					 unsigned long addr, pte_t *ptep)
    47. 

  47. {
    48. 

  48. }
    49. 

  49. 

  50. static inline int huge_pte_none(pte_t pte)
    51. 

  51. {
    52. 

  52. 	return pte_none(pte);
    53. 

  53. }
    54. 

  54. 

  55. static inline pte_t huge_pte_wrprotect(pte_t pte)
    56. 

  56. {
    57. 

  57. 	return pte_wrprotect(pte);
    58. 

  58. }
    59. 

  59. 

  60. static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
    61. 

  61. 					   unsigned long addr, pte_t *ptep)
    62. 

  62. {
    63. 

  63. 	pte_t old_pte = *ptep;
    64. 

  64. 	set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
    65. 

  65. }
    66. 

  66. 

  67. static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
    68. 

  68. 					     unsigned long addr, pte_t *ptep,
    69. 

  69. 					     pte_t pte, int dirty)
    70. 

  70. {
    71. 

  71. 	int changed = !pte_same(*ptep, pte);
    72. 

  72. 	if (changed) {
    73. 

  73. 		set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
    74. 

  74. 		flush_tlb_page(vma, addr);
    75. 

  75. 	}
    76. 

  76. 	return changed;
    77. 

  77. }
    78. 

  78. 

  79. static inline pte_t huge_ptep_get(pte_t *ptep)
    80. 

  80. {
    81. 

  81. 	return *ptep;
    82. 

  82. }
    83. 

  83. 

  84. static inline int arch_prepare_hugepage(struct page *page)
    85. 

  85. {
    86. 

  86. 	return 0;
    87. 

  87. }
    88. 

  88. 

  89. static inline void arch_release_hugepage(struct page *page)
    90. 

  90. {
    91. 

  91. }
    92. 

  92. 

  93. static inline void arch_clear_hugepage_flags(struct page *page)
    94. 

  94. {
    95. 

  95. }
    96. 

  96. 

  97. #endif /* _ASM_SPARC64_HUGETLB_H */
    98.