81 строка
1.7 KiB
C
81 строка
1.7 KiB
C
/*
|
|
* Copyright (C) 2004-2006 Atmel Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#ifndef __ASM_AVR32_PGALLOC_H
|
|
#define __ASM_AVR32_PGALLOC_H
|
|
|
|
#include <asm/processor.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/mm.h>
|
|
|
|
#define pmd_populate_kernel(mm, pmd, pte) \
|
|
set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
|
|
|
|
static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
|
|
pgtable_t pte)
|
|
{
|
|
set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
|
|
}
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
|
|
/*
|
|
* Allocate and free page tables
|
|
*/
|
|
static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
|
|
{
|
|
return kcalloc(USER_PTRS_PER_PGD, sizeof(pgd_t), GFP_KERNEL);
|
|
}
|
|
|
|
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
|
|
{
|
|
kfree(pgd);
|
|
}
|
|
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
|
|
unsigned long address)
|
|
{
|
|
pte_t *pte;
|
|
|
|
pte = (pte_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT);
|
|
|
|
return pte;
|
|
}
|
|
|
|
static inline struct page *pte_alloc_one(struct mm_struct *mm,
|
|
unsigned long address)
|
|
{
|
|
struct page *pte;
|
|
|
|
pte = alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
|
|
if (!pte)
|
|
return NULL;
|
|
pgtable_page_ctor(pte);
|
|
return pte;
|
|
}
|
|
|
|
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)
|
|
|
|
#define check_pgt_cache() do { } while(0)
|
|
|
|
#endif /* __ASM_AVR32_PGALLOC_H */
|