LXR linux/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
   8static 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
  14static 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
  28static 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
  34static 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
  40static 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
  52static 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
  61static 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
  69static 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 */
  75