hugetlbpage.c 1.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * arch/sh/mm/hugetlbpage.c
  4. *
  5. * SuperH HugeTLB page support.
  6. *
  7. * Cloned from sparc64 by Paul Mundt.
  8. *
  9. * Copyright (C) 2002, 2003 David S. Miller ([email protected])
  10. */
  11. #include <linux/init.h>
  12. #include <linux/fs.h>
  13. #include <linux/mm.h>
  14. #include <linux/hugetlb.h>
  15. #include <linux/pagemap.h>
  16. #include <linux/sysctl.h>
  17. #include <asm/mman.h>
  18. #include <asm/tlb.h>
  19. #include <asm/tlbflush.h>
  20. #include <asm/cacheflush.h>
  21. pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
  22. unsigned long addr, unsigned long sz)
  23. {
  24. pgd_t *pgd;
  25. p4d_t *p4d;
  26. pud_t *pud;
  27. pmd_t *pmd;
  28. pte_t *pte = NULL;
  29. pgd = pgd_offset(mm, addr);
  30. if (pgd) {
  31. p4d = p4d_alloc(mm, pgd, addr);
  32. if (p4d) {
  33. pud = pud_alloc(mm, p4d, addr);
  34. if (pud) {
  35. pmd = pmd_alloc(mm, pud, addr);
  36. if (pmd)
  37. pte = pte_alloc_map(mm, pmd, addr);
  38. }
  39. }
  40. }
  41. return pte;
  42. }
  43. pte_t *huge_pte_offset(struct mm_struct *mm,
  44. unsigned long addr, unsigned long sz)
  45. {
  46. pgd_t *pgd;
  47. p4d_t *p4d;
  48. pud_t *pud;
  49. pmd_t *pmd;
  50. pte_t *pte = NULL;
  51. pgd = pgd_offset(mm, addr);
  52. if (pgd) {
  53. p4d = p4d_offset(pgd, addr);
  54. if (p4d) {
  55. pud = pud_offset(p4d, addr);
  56. if (pud) {
  57. pmd = pmd_offset(pud, addr);
  58. if (pmd)
  59. pte = pte_offset_map(pmd, addr);
  60. }
  61. }
  62. }
  63. return pte;
  64. }
  65. int pmd_huge(pmd_t pmd)
  66. {
  67. return 0;
  68. }
  69. int pud_huge(pud_t pud)
  70. {
  71. return 0;
  72. }