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/*
* 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,
struct page *pte)
{
set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
}
/*
* Allocate and free page tables
*/
static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
{
unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
pgd_t *pgd = kmalloc(pgd_size, GFP_KERNEL);
if (pgd)
memset(pgd, 0, pgd_size);
return pgd;
}
static inline void pgd_free(pgd_t *pgd)
{
kfree(pgd);
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address)
{
int count = 0;
pte_t *pte;
do {
pte = (pte_t *) __get_free_page(GFP_KERNEL | __GFP_REPEAT);
if (pte)
clear_page(pte);
else {
current->state = TASK_UNINTERRUPTIBLE;
schedule_timeout(HZ);
}
} while (!pte && (count++ < 10));
return pte;
}
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long address)
{
int count = 0;
struct page *pte;
do {
pte = alloc_pages(GFP_KERNEL, 0);
if (pte)
clear_page(page_address(pte));
else {
current->state = TASK_UNINTERRUPTIBLE;
schedule_timeout(HZ);
}
} while (!pte && (count++ < 10));
return pte;
}
static inline void pte_free_kernel(pte_t *pte)
{
free_page((unsigned long)pte);
}
static inline void pte_free(struct page *pte)
{
__free_page(pte);
}
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
#define check_pgt_cache() do { } while(0)
#endif /* __ASM_AVR32_PGALLOC_H */
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