arch/m68k/include/asm/motorola_pgalloc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _MOTOROLA_PGALLOC_H
   3 #define _MOTOROLA_PGALLOC_H
   4
   5 #include <asm/tlb.h>
   6 #include <asm/tlbflush.h>
   7
   8 extern pmd_t *get_pointer_table(void);
   9 extern int free_pointer_table(pmd_t *);
  10
  11 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
  12 {
  13         pte_t *pte;
  14
  15         pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
  16         if (pte) {
  17                 __flush_page_to_ram(pte);
  18                 flush_tlb_kernel_page(pte);
  19                 nocache_page(pte);
  20         }
  21
  22         return pte;
  23 }
  24
  25 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  26 {
  27         cache_page(pte);
  28         free_page((unsigned long) pte);
  29 }
  30
  31 static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
  32 {
  33         struct page *page;
  34         pte_t *pte;
  35
  36         page = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0);
  37         if(!page)
  38                 return NULL;
  39         if (!pgtable_page_ctor(page)) {
  40                 __free_page(page);
  41                 return NULL;
  42         }
  43
  44         pte = kmap(page);
  45         __flush_page_to_ram(pte);
  46         flush_tlb_kernel_page(pte);
  47         nocache_page(pte);
  48         kunmap(page);
  49         return page;
  50 }
  51
  52 static inline void pte_free(struct mm_struct *mm, pgtable_t page)
  53 {
  54         pgtable_page_dtor(page);
  55         cache_page(kmap(page));
  56         kunmap(page);
  57         __free_page(page);
  58 }
  59
  60 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
  61                                   unsigned long address)
  62 {
  63         pgtable_page_dtor(page);
  64         cache_page(kmap(page));
  65         kunmap(page);
  66         __free_page(page);
  67 }
  68
  69
  70 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
  71 {
  72         return get_pointer_table();
  73 }
  74
  75 static inline int pmd_free(struct mm_struct *mm, pmd_t *pmd)
  76 {
  77         return free_pointer_table(pmd);
  78 }
  79
  80 static inline int __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
  81                                  unsigned long address)
  82 {
  83         return free_pointer_table(pmd);
  84 }
  85
  86
  87 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  88 {
  89         pmd_free(mm, (pmd_t *)pgd);
  90 }
  91
  92 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
  93 {
  94         return (pgd_t *)get_pointer_table();
  95 }
  96
  97
  98 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
  99 {
 100         pmd_set(pmd, pte);
 101 }
 102
 103 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
 104 {
 105         pmd_set(pmd, page_address(page));
 106 }
 107 #define pmd_pgtable(pmd) pmd_page(pmd)
 108
 109 static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
 110 {
 111         pgd_set(pgd, pmd);
 112 }
 113
 114 #endif /* _MOTOROLA_PGALLOC_H */