LXR linux/arch/ia64/include/asm/pgalloc.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_IA64_PGALLOC_H
   3#define _ASM_IA64_PGALLOC_H
   4
   5/*
   6 * This file contains the functions and defines necessary to allocate
   7 * page tables.
   8 *
   9 * This hopefully works with any (fixed) ia-64 page-size, as defined
  10 * in <asm/page.h> (currently 8192).
  11 *
  12 * Copyright (C) 1998-2001 Hewlett-Packard Co
  13 *      David Mosberger-Tang <davidm@hpl.hp.com>
  14 * Copyright (C) 2000, Goutham Rao <goutham.rao@intel.com>
  15 */
  16
  17
  18#include <linux/compiler.h>
  19#include <linux/mm.h>
  20#include <linux/page-flags.h>
  21#include <linux/threads.h>
  22
  23#include <asm-generic/pgalloc.h>
  24
  25#include <asm/mmu_context.h>
  26
  27static inline pgd_t *pgd_alloc(struct mm_struct *mm)
  28{
  29        return (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
  30}
  31
  32static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  33{
  34        free_page((unsigned long)pgd);
  35}
  36
  37#if CONFIG_PGTABLE_LEVELS == 4
  38static inline void
  39p4d_populate(struct mm_struct *mm, p4d_t * p4d_entry, pud_t * pud)
  40{
  41        p4d_val(*p4d_entry) = __pa(pud);
  42}
  43
  44static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
  45{
  46        return (pud_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
  47}
  48
  49static inline void pud_free(struct mm_struct *mm, pud_t *pud)
  50{
  51        free_page((unsigned long)pud);
  52}
  53#define __pud_free_tlb(tlb, pud, address)       pud_free((tlb)->mm, pud)
  54#endif /* CONFIG_PGTABLE_LEVELS == 4 */
  55
  56static inline void
  57pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
  58{
  59        pud_val(*pud_entry) = __pa(pmd);
  60}
  61
  62static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
  63{
  64        return (pmd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
  65}
  66
  67static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
  68{
  69        free_page((unsigned long)pmd);
  70}
  71
  72#define __pmd_free_tlb(tlb, pmd, address)       pmd_free((tlb)->mm, pmd)
  73
  74static inline void
  75pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte)
  76{
  77        pmd_val(*pmd_entry) = page_to_phys(pte);
  78}
  79#define pmd_pgtable(pmd) pmd_page(pmd)
  80
  81static inline void
  82pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
  83{
  84        pmd_val(*pmd_entry) = __pa(pte);
  85}
  86
  87#define __pte_free_tlb(tlb, pte, address)       pte_free((tlb)->mm, pte)
  88
  89#endif                          /* _ASM_IA64_PGALLOC_H */
  90