arch/m32r/include/asm/pgalloc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_M32R_PGALLOC_H
   3 #define _ASM_M32R_PGALLOC_H
   4
   5 #include <linux/mm.h>
   6
   7 #include <asm/io.h>
   8
   9 #define pmd_populate_kernel(mm, pmd, pte)       \
  10         set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
  11
  12 static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
  13         pgtable_t pte)
  14 {
  15         set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
  16 }
  17 #define pmd_pgtable(pmd) pmd_page(pmd)
  18
  19 /*
  20  * Allocate and free page tables.
  21  */
  22 static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
  23 {
  24         pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
  25
  26         return pgd;
  27 }
  28
  29 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  30 {
  31         free_page((unsigned long)pgd);
  32 }
  33
  34 static __inline__ pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
  35         unsigned long address)
  36 {
  37         pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
  38
  39         return pte;
  40 }
  41
  42 static __inline__ pgtable_t pte_alloc_one(struct mm_struct *mm,
  43         unsigned long address)
  44 {
  45         struct page *pte = alloc_page(GFP_KERNEL|__GFP_ZERO);
  46
  47         if (!pte)
  48                 return NULL;
  49         if (!pgtable_page_ctor(pte)) {
  50                 __free_page(pte);
  51                 return NULL;
  52         }
  53         return pte;
  54 }
  55
  56 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  57 {
  58         free_page((unsigned long)pte);
  59 }
  60
  61 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
  62 {
  63         pgtable_page_dtor(pte);
  64         __free_page(pte);
  65 }
  66
  67 #define __pte_free_tlb(tlb, pte, addr)  pte_free((tlb)->mm, (pte))
  68
  69 /*
  70  * allocating and freeing a pmd is trivial: the 1-entry pmd is
  71  * inside the pgd, so has no extra memory associated with it.
  72  * (In the PAE case we free the pmds as part of the pgd.)
  73  */
  74
  75 #define pmd_alloc_one(mm, addr)         ({ BUG(); ((pmd_t *)2); })
  76 #define pmd_free(mm, x)                 do { } while (0)
  77 #define __pmd_free_tlb(tlb, x, addr)    do { } while (0)
  78 #define pgd_populate(mm, pmd, pte)      BUG()
  79
  80 #define check_pgt_cache()       do { } while (0)
  81
  82 #endif /* _ASM_M32R_PGALLOC_H */