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#include <linux/quicklist.h>
  23
  24#include <asm/mmu_context.h>
  25
  26static inline pgd_t *pgd_alloc(struct mm_struct *mm)
  27{
  28        return quicklist_alloc(0, GFP_KERNEL, NULL);
  29}
  30
  31static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  32{
  33        quicklist_free(0, NULL, pgd);
  34}
  35
  36#if CONFIG_PGTABLE_LEVELS == 4
  37static inline void
  38pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
  39{
  40        pgd_val(*pgd_entry) = __pa(pud);
  41}
  42
  43static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
  44{
  45        return quicklist_alloc(0, GFP_KERNEL, NULL);
  46}
  47
  48static inline void pud_free(struct mm_struct *mm, pud_t *pud)
  49{
  50        quicklist_free(0, NULL, pud);
  51}
  52#define __pud_free_tlb(tlb, pud, address)       pud_free((tlb)->mm, pud)
  53#endif /* CONFIG_PGTABLE_LEVELS == 4 */
  54
  55static inline void
  56pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
  57{
  58        pud_val(*pud_entry) = __pa(pmd);
  59}
  60
  61static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
  62{
  63        return quicklist_alloc(0, GFP_KERNEL, NULL);
  64}
  65
  66static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
  67{
  68        quicklist_free(0, NULL, pmd);
  69}
  70
  71#define __pmd_free_tlb(tlb, pmd, address)       pmd_free((tlb)->mm, pmd)
  72
  73static inline void
  74pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte)
  75{
  76        pmd_val(*pmd_entry) = page_to_phys(pte);
  77}
  78#define pmd_pgtable(pmd) pmd_page(pmd)
  79
  80static inline void
  81pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
  82{
  83        pmd_val(*pmd_entry) = __pa(pte);
  84}
  85
  86static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr)
  87{
  88        struct page *page;
  89        void *pg;
  90
  91        pg = quicklist_alloc(0, GFP_KERNEL, NULL);
  92        if (!pg)
  93                return NULL;
  94        page = virt_to_page(pg);
  95        if (!pgtable_page_ctor(page)) {
  96                quicklist_free(0, NULL, pg);
  97                return NULL;
  98        }
  99        return page;
 100}
 101
 102static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
 103                                          unsigned long addr)
 104{
 105        return quicklist_alloc(0, GFP_KERNEL, NULL);
 106}
 107
 108static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
 109{
 110        pgtable_page_dtor(pte);
 111        quicklist_free_page(0, NULL, pte);
 112}
 113
 114static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
 115{
 116        quicklist_free(0, NULL, pte);
 117}
 118
 119static inline void check_pgt_cache(void)
 120{
 121        quicklist_trim(0, NULL, 25, 16);
 122}
 123
 124#define __pte_free_tlb(tlb, pte, address)       pte_free((tlb)->mm, pte)
 125
 126#endif                          /* _ASM_IA64_PGALLOC_H */
 127