70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/* pgalloc.h: Page allocation routines for FRV
|
|
*
|
|
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*
|
|
* Derived from:
|
|
* include/asm-m68knommu/pgalloc.h
|
|
* include/asm-i386/pgalloc.h
|
|
*/
|
|
#ifndef _ASM_PGALLOC_H
|
|
#define _ASM_PGALLOC_H
|
|
|
|
#include <asm/setup.h>
|
|
#include <asm/virtconvert.h>
|
|
|
|
#ifdef CONFIG_MMU
|
|
|
|
#define pmd_populate_kernel(mm, pmd, pte) __set_pmd(pmd, __pa(pte) | _PAGE_TABLE)
|
|
#define pmd_populate(MM, PMD, PAGE) \
|
|
do { \
|
|
__set_pmd((PMD), page_to_pfn(PAGE) << PAGE_SHIFT | _PAGE_TABLE); \
|
|
} while(0)
|
|
#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 *);
|
|
|
|
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) \
|
|
do { \
|
|
pgtable_page_dtor(pte); \
|
|
tlb_remove_page((tlb),(pte)); \
|
|
} while (0)
|
|
|
|
/*
|
|
* allocating and freeing a pmd is trivial: the 1-entry pmd is
|
|
* inside the pgd, so has no extra memory associated with it.
|
|
* (In the PAE case we free the pmds as part of the pgd.)
|
|
*/
|
|
#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *) 2); })
|
|
#define pmd_free(mm, x) do { } while (0)
|
|
#define __pmd_free_tlb(tlb,x) do { } while (0)
|
|
|
|
#endif /* CONFIG_MMU */
|
|
|
|
#endif /* _ASM_PGALLOC_H */
|