pgalloc.h

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/* 
 * Copyright (C) 2000, 2001, 2002 Jeff Dike ([email protected])
 * Copyright 2003 PathScale, Inc.
 * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h
 * Licensed under the GPL
 */

#ifndef __UM_PGALLOC_H
#define __UM_PGALLOC_H

#include <linux/mm.h>

#define pmd_populate_kernel(mm, pmd, pte) \
    set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))

#define pmd_populate(mm, pmd, pte)              \
    set_pmd(pmd, __pmd(_PAGE_TABLE +            \
        ((unsigned long long)page_to_pfn(pte) <<    \
            (unsigned long long) PAGE_SHIFT)))
#define pmd_pgtable(pmd) pmd_page(pmd)

/*
 * Allocate and free page tables.
 */
extern pgd_t *pgd_alloc(struct mm_struct *);
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);

extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);

static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
    free_page((unsigned long) pte);
}

static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
    pgtable_page_dtor(pte);
    __free_page(pte);
}

#define __pte_free_tlb(tlb,pte, address)        \
do {                            \
    pgtable_page_dtor(pte);             \
    tlb_remove_page((tlb),(pte));           \
} while (0)

#ifdef CONFIG_3_LEVEL_PGTABLES

static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
{
    free_page((unsigned long)pmd);
}

#define __pmd_free_tlb(tlb,x, address)   tlb_remove_page((tlb),virt_to_page(x))
#endif

#define check_pgt_cache()   do { } while (0)

#endif