1#ifndef _ASM_IA64_PGALLOC_H
  2#define _ASM_IA64_PGALLOC_H
  3
  4/*
  5 * This file contains the functions and defines necessary to allocate
  6 * page tables.
  7 *
  8 * This hopefully works with any (fixed) ia-64 page-size, as defined
  9 * in <asm/page.h> (currently 8192).
 10 *
 11 * Copyright (C) 1998-2001 Hewlett-Packard Co
 12 *	David Mosberger-Tang <davidm@hpl.hp.com>
 13 * Copyright (C) 2000, Goutham Rao <goutham.rao@intel.com>
 14 */
 15
 16
 17#include <linux/compiler.h>
 18#include <linux/mm.h>
 19#include <linux/page-flags.h>
 20#include <linux/threads.h>
 21#include <linux/quicklist.h>
 22
 23#include <asm/mmu_context.h>
 24
 25static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 26{
 27	return quicklist_alloc(0, GFP_KERNEL, NULL);
 28}
 29
 30static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
 31{
 32	quicklist_free(0, NULL, pgd);
 33}
 34
 35#ifdef CONFIG_PGTABLE_4
 36static inline void
 37pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
 38{
 39	pgd_val(*pgd_entry) = __pa(pud);
 40}
 41
 42static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
 43{
 44	return quicklist_alloc(0, GFP_KERNEL, NULL);
 45}
 46
 47static inline void pud_free(struct mm_struct *mm, pud_t *pud)
 48{
 49	quicklist_free(0, NULL, pud);
 50}
 51#define __pud_free_tlb(tlb, pud, address)	pud_free((tlb)->mm, pud)
 52#endif /* CONFIG_PGTABLE_4 */
 53
 54static inline void
 55pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
 56{
 57	pud_val(*pud_entry) = __pa(pmd);
 58}
 59
 60static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
 61{
 62	return quicklist_alloc(0, GFP_KERNEL, NULL);
 63}
 64
 65static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
 66{
 67	quicklist_free(0, NULL, pmd);
 68}
 69
 70#define __pmd_free_tlb(tlb, pmd, address)	pmd_free((tlb)->mm, pmd)
 71
 72static inline void
 73pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte)
 74{
 75	pmd_val(*pmd_entry) = page_to_phys(pte);
 76}
 77#define pmd_pgtable(pmd) pmd_page(pmd)
 78
 79static inline void
 80pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
 81{
 82	pmd_val(*pmd_entry) = __pa(pte);
 83}
 84
 85static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr)
 86{
 87	struct page *page;
 88	void *pg;
 89
 90	pg = quicklist_alloc(0, GFP_KERNEL, NULL);
 91	if (!pg)
 92		return NULL;
 93	page = virt_to_page(pg);
 94	pgtable_page_ctor(page);
 95	return page;
 96}
 97
 98static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
 99					  unsigned long addr)
100{
101	return quicklist_alloc(0, GFP_KERNEL, NULL);
102}
103
104static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
105{
106	pgtable_page_dtor(pte);
107	quicklist_free_page(0, NULL, pte);
108}
109
110static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
111{
112	quicklist_free(0, NULL, pte);
113}
114
115static inline void check_pgt_cache(void)
116{
117	quicklist_trim(0, NULL, 25, 16);
118}
119
120#define __pte_free_tlb(tlb, pte, address)	pte_free((tlb)->mm, pte)
121
122#endif				/* _ASM_IA64_PGALLOC_H */