arch/sparc/include/asm/pgalloc_64.h

   1 #ifndef _SPARC64_PGALLOC_H
   2 #define _SPARC64_PGALLOC_H
   3
   4 #include <linux/kernel.h>
   5 #include <linux/sched.h>
   6 #include <linux/mm.h>
   7 #include <linux/slab.h>
   8
   9 #include <asm/spitfire.h>
  10 #include <asm/cpudata.h>
  11 #include <asm/cacheflush.h>
  12 #include <asm/page.h>
  13
  14 /* Page table allocation/freeing. */
  15
  16 extern struct kmem_cache *pgtable_cache;
  17
  18 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
  19 {
  20         return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
  21 }
  22
  23 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  24 {
  25         kmem_cache_free(pgtable_cache, pgd);
  26 }
  27
  28 #define pud_populate(MM, PUD, PMD)      pud_set(PUD, PMD)
  29
  30 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
  31 {
  32         return kmem_cache_alloc(pgtable_cache,
  33                                 GFP_KERNEL|__GFP_REPEAT);
  34 }
  35
  36 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
  37 {
  38         kmem_cache_free(pgtable_cache, pmd);
  39 }
  40
  41 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
  42                                           unsigned long address)
  43 {
  44         return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
  45 }
  46
  47 static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
  48                                         unsigned long address)
  49 {
  50         struct page *page;
  51         pte_t *pte;
  52
  53         pte = pte_alloc_one_kernel(mm, address);
  54         if (!pte)
  55                 return NULL;
  56         page = virt_to_page(pte);
  57         pgtable_page_ctor(page);
  58         return page;
  59 }
  60
  61 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  62 {
  63         free_page((unsigned long)pte);
  64 }
  65
  66 static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
  67 {
  68         pgtable_page_dtor(ptepage);
  69         __free_page(ptepage);
  70 }
  71
  72 #define pmd_populate_kernel(MM, PMD, PTE)       pmd_set(PMD, PTE)
  73 #define pmd_populate(MM,PMD,PTE_PAGE)           \
  74         pmd_populate_kernel(MM,PMD,page_address(PTE_PAGE))
  75 #define pmd_pgtable(pmd) pmd_page(pmd)
  76
  77 #define check_pgt_cache()       do { } while (0)
  78
  79 static inline void pgtable_free(void *table, bool is_page)
  80 {
  81         if (is_page)
  82                 free_page((unsigned long)table);
  83         else
  84                 kmem_cache_free(pgtable_cache, table);
  85 }
  86
  87 #ifdef CONFIG_SMP
  88
  89 struct mmu_gather;
  90 extern void tlb_remove_table(struct mmu_gather *, void *);
  91
  92 static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is_page)
  93 {
  94         unsigned long pgf = (unsigned long)table;
  95         if (is_page)
  96                 pgf |= 0x1UL;
  97         tlb_remove_table(tlb, (void *)pgf);
  98 }
  99
 100 static inline void __tlb_remove_table(void *_table)
 101 {
 102         void *table = (void *)((unsigned long)_table & ~0x1UL);
 103         bool is_page = false;
 104
 105         if ((unsigned long)_table & 0x1UL)
 106                 is_page = true;
 107         pgtable_free(table, is_page);
 108 }
 109 #else /* CONFIG_SMP */
 110 static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is_page)
 111 {
 112         pgtable_free(table, is_page);
 113 }
 114 #endif /* !CONFIG_SMP */
 115
 116 static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage,
 117                                   unsigned long address)
 118 {
 119         pgtable_page_dtor(ptepage);
 120         pgtable_free_tlb(tlb, page_address(ptepage), true);
 121 }
 122
 123 #define __pmd_free_tlb(tlb, pmd, addr)                \
 124         pgtable_free_tlb(tlb, pmd, false)
 125
 126 #endif /* _SPARC64_PGALLOC_H */