root/arch/alpha/include/asm/pgalloc.h

INCLUDED FROM

DEFINITIONS

1. pmd_populate
2. pmd_populate_kernel
3. pgd_populate
4. pgd_free
5. pmd_alloc_one
6. pmd_free

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ALPHA_PGALLOC_H
   3 #define _ALPHA_PGALLOC_H
   4 
   5 #include <linux/mm.h>
   6 #include <linux/mmzone.h>
   7 
   8 #include <asm-generic/pgalloc.h>        /* for pte_{alloc,free}_one */
   9 
  10 /*      
  11  * Allocate and free page tables. The xxx_kernel() versions are
  12  * used to allocate a kernel page table - this turns on ASN bits
  13  * if any.
  14  */
  15 
  16 static inline void
  17 pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
  18 {
  19         pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
  20 }
  21 #define pmd_pgtable(pmd) pmd_page(pmd)
  22 
  23 static inline void
  24 pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
  25 {
  26         pmd_set(pmd, pte);
  27 }
  28 
  29 static inline void
  30 pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
  31 {
  32         pgd_set(pgd, pmd);
  33 }
  34 
  35 extern pgd_t *pgd_alloc(struct mm_struct *mm);
  36 
  37 static inline void
  38 pgd_free(struct mm_struct *mm, pgd_t *pgd)
  39 {
  40         free_page((unsigned long)pgd);
  41 }
  42 
  43 static inline pmd_t *
  44 pmd_alloc_one(struct mm_struct *mm, unsigned long address)
  45 {
  46         pmd_t *ret = (pmd_t *)__get_free_page(GFP_PGTABLE_USER);
  47         return ret;
  48 }
  49 
  50 static inline void
  51 pmd_free(struct mm_struct *mm, pmd_t *pmd)
  52 {
  53         free_page((unsigned long)pmd);
  54 }
  55 
  56 #endif /* _ALPHA_PGALLOC_H */