[deliverable/linux.git] / include / asm-alpha / pgalloc.h

#ifndef _ALPHA_PGALLOC_H
#define _ALPHA_PGALLOC_H

#include <linux/mm.h>
#include <linux/mmzone.h>

/*      
 * Allocate and free page tables. The xxx_kernel() versions are
 * used to allocate a kernel page table - this turns on ASN bits
 * if any.
 */

static inline void
pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
{
	pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
}
#define pmd_pgtable(pmd) pmd_page(pmd)

static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
{
	pmd_set(pmd, pte);
}

static inline void
pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
{
	pgd_set(pgd, pmd);
}

extern pgd_t *pgd_alloc(struct mm_struct *mm);

static inline void
pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
	free_page((unsigned long)pgd);
}

static inline pmd_t *
pmd_alloc_one(struct mm_struct *mm, unsigned long address)
{
	pmd_t *ret = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
	return ret;
}

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

extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);

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

static inline pgtable_t
pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
	pte_t *pte = pte_alloc_one_kernel(mm, address);
	struct page *page;

	if (!pte)
		return NULL;
	page = virt_to_page(pte);
	pgtable_page_ctor(page);
	return page;
}

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

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

#endif /* _ALPHA_PGALLOC_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _ALPHA_PGALLOC_H
	2	#define _ALPHA_PGALLOC_H
	3
1da177e4 LT	4	#include <linux/mm.h>
	5	#include <linux/mmzone.h>
	6
	7	/*
	8	* Allocate and free page tables. The xxx_kernel() versions are
	9	* used to allocate a kernel page table - this turns on ASN bits
	10	* if any.
	11	*/
	12
	13	static inline void
2f569afd	14	pmd_populate(struct mm_struct mm, pmd_t pmd, pgtable_t pte)
1da177e4 LT	15	{
	16	pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
	17	}
2f569afd	18	#define pmd_pgtable(pmd) pmd_page(pmd)
1da177e4 LT	19
	20	static inline void
	21	pmd_populate_kernel(struct mm_struct mm, pmd_t pmd, pte_t *pte)
	22	{
	23	pmd_set(pmd, pte);
	24	}
	25
	26	static inline void
	27	pgd_populate(struct mm_struct mm, pgd_t pgd, pmd_t *pmd)
	28	{
	29	pgd_set(pgd, pmd);
	30	}
	31
	32	extern pgd_t pgd_alloc(struct mm_struct mm);
	33
	34	static inline void
5e541973	35	pgd_free(struct mm_struct mm, pgd_t pgd)
1da177e4 LT	36	{
	37	free_page((unsigned long)pgd);
	38	}
	39
	40	static inline pmd_t *
	41	pmd_alloc_one(struct mm_struct *mm, unsigned long address)
	42	{
	43	pmd_t ret = (pmd_t )__get_free_page(GFP_KERNEL\|__GFP_REPEAT\|__GFP_ZERO);
	44	return ret;
	45	}
	46
	47	static inline void
5e541973	48	pmd_free(struct mm_struct mm, pmd_t pmd)
1da177e4 LT	49	{
	50	free_page((unsigned long)pmd);
	51	}
	52
	53	extern pte_t pte_alloc_one_kernel(struct mm_struct mm, unsigned long addr);
	54
	55	static inline void
5e541973	56	pte_free_kernel(struct mm_struct mm, pte_t pte)
1da177e4 LT	57	{
	58	free_page((unsigned long)pte);
	59	}
	60
2f569afd MS	61	static inline pgtable_t
2f569afd MS	62	pte_alloc_one(struct mm_struct *mm, unsigned long address)
1da177e4	63	{
2f569afd MS	64	pte_t *pte = pte_alloc_one_kernel(mm, address);
	65	struct page *page;
	66
	67	if (!pte)
	68	return NULL;
	69	page = virt_to_page(pte);
	70	pgtable_page_ctor(page);
	71	return page;
1da177e4 LT	72	}
	73
	74	static inline void
2f569afd	75	pte_free(struct mm_struct *mm, pgtable_t page)
1da177e4	76	{
2f569afd	77	pgtable_page_dtor(page);
1da177e4 LT	78	__free_page(page);
	79	}
	80
	81	#define check_pgt_cache() do { } while (0)
	82
	83	#endif /* _ALPHA_PGALLOC_H */