arch/powerpc/include/asm/book3s/32/pgalloc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_BOOK3S_32_PGALLOC_H
   3 #define _ASM_POWERPC_BOOK3S_32_PGALLOC_H
   4
   5 #include <linux/threads.h>
   6 #include <linux/slab.h>
   7
   8 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
   9 {
  10         return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
  11                         pgtable_gfp_flags(mm, GFP_KERNEL));
  12 }
  13
  14 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  15 {
  16         kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
  17 }
  18
  19 /*
  20  * We don't have any real pmd's, and this code never triggers because
  21  * the pgd will always be present..
  22  */
  23 /* #define pmd_alloc_one(mm,address)       ({ BUG(); ((pmd_t *)2); }) */
  24 #define pmd_free(mm, x)                 do { } while (0)
  25 #define __pmd_free_tlb(tlb,x,a)         do { } while (0)
  26 /* #define pgd_populate(mm, pmd, pte)      BUG() */
  27
  28 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp,
  29                                        pte_t *pte)
  30 {
  31         *pmdp = __pmd(__pa(pte) | _PMD_PRESENT);
  32 }
  33
  34 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp,
  35                                 pgtable_t pte_page)
  36 {
  37         *pmdp = __pmd(__pa(pte_page) | _PMD_PRESENT);
  38 }
  39
  40 static inline void pgtable_free(void *table, unsigned index_size)
  41 {
  42         if (!index_size) {
  43                 pte_fragment_free((unsigned long *)table, 0);
  44         } else {
  45                 BUG_ON(index_size > MAX_PGTABLE_INDEX_SIZE);
  46                 kmem_cache_free(PGT_CACHE(index_size), table);
  47         }
  48 }
  49
  50 #define get_hugepd_cache_index(x)  (x)
  51
  52 static inline void pgtable_free_tlb(struct mmu_gather *tlb,
  53                                     void *table, int shift)
  54 {
  55         unsigned long pgf = (unsigned long)table;
  56         BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
  57         pgf |= shift;
  58         tlb_remove_table(tlb, (void *)pgf);
  59 }
  60
  61 static inline void __tlb_remove_table(void *_table)
  62 {
  63         void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
  64         unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
  65
  66         pgtable_free(table, shift);
  67 }
  68
  69 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
  70                                   unsigned long address)
  71 {
  72         pgtable_free_tlb(tlb, table, 0);
  73 }
  74 #endif /* _ASM_POWERPC_BOOK3S_32_PGALLOC_H */