[deliverable/linux.git] / arch / mips / include / asm / pgalloc.h

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
 * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
 */
#ifndef _ASM_PGALLOC_H
#define _ASM_PGALLOC_H

#include <linux/highmem.h>
#include <linux/mm.h>
#include <linux/sched.h>

static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
	pte_t *pte)
{
	set_pmd(pmd, __pmd((unsigned long)pte));
}

static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
	pgtable_t pte)
{
	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
}
#define pmd_pgtable(pmd) pmd_page(pmd)

/*
 * Initialize a new pmd table with invalid pointers.
 */
extern void pmd_init(unsigned long page, unsigned long pagetable);

#ifndef __PAGETABLE_PMD_FOLDED

static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
{
	set_pud(pud, __pud((unsigned long)pmd));
}
#endif

/*
 * Initialize a new pgd / pmd table with invalid pointers.
 */
extern void pgd_init(unsigned long page);

static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
	pgd_t *ret, *init;

	ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
	if (ret) {
		init = pgd_offset(&init_mm, 0UL);
		pgd_init((unsigned long)ret);
		memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
		       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
	}

	return ret;
}

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

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

	pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_ZERO, PTE_ORDER);

	return pte;
}

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

	pte = alloc_pages(GFP_KERNEL, PTE_ORDER);
	if (!pte)
		return NULL;
	clear_highpage(pte);
	if (!pgtable_page_ctor(pte)) {
		__free_page(pte);
		return NULL;
	}
	return pte;
}

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

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

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

#ifndef __PAGETABLE_PMD_FOLDED

static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
{
	pmd_t *pmd;

	pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
	if (pmd)
		pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
	return pmd;
}

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

#define __pmd_free_tlb(tlb, x, addr)	pmd_free((tlb)->mm, x)

#endif

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

extern void pagetable_init(void);

#endif /* _ASM_PGALLOC_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* Copyright (C) 1994 - 2001, 2003 by Ralf Baechle
	7	* Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
	8	*/
	9	#ifndef _ASM_PGALLOC_H
	10	#define _ASM_PGALLOC_H
	11
1da177e4 LT	12	#include <linux/highmem.h>
1da177e4 LT	13	#include <linux/mm.h>
e8edc6e0	14	#include <linux/sched.h>
1da177e4 LT	15
	16	static inline void pmd_populate_kernel(struct mm_struct mm, pmd_t pmd,
	17	pte_t *pte)
	18	{
	19	set_pmd(pmd, __pmd((unsigned long)pte));
	20	}
	21
	22	static inline void pmd_populate(struct mm_struct mm, pmd_t pmd,
2f569afd	23	pgtable_t pte)
1da177e4 LT	24	{
	25	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
	26	}
2f569afd	27	#define pmd_pgtable(pmd) pmd_page(pmd)
1da177e4	28
c6e8b587 RB	29	/*
	30	* Initialize a new pmd table with invalid pointers.
	31	*/
	32	extern void pmd_init(unsigned long page, unsigned long pagetable);
	33
325f8a0a	34	#ifndef __PAGETABLE_PMD_FOLDED
c6e8b587 RB	35
	36	static inline void pud_populate(struct mm_struct mm, pud_t pud, pmd_t *pmd)
	37	{
	38	set_pud(pud, __pud((unsigned long)pmd));
	39	}
	40	#endif
	41
1da177e4 LT	42	/*
	43	* Initialize a new pgd / pmd table with invalid pointers.
	44	*/
	45	extern void pgd_init(unsigned long page);
1da177e4 LT	46
	47	static inline pgd_t pgd_alloc(struct mm_struct mm)
	48	{
	49	pgd_t ret, init;
	50
	51	ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
	52	if (ret) {
242954b5	53	init = pgd_offset(&init_mm, 0UL);
1da177e4 LT	54	pgd_init((unsigned long)ret);
	55	memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
	56	(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
	57	}
	58
	59	return ret;
	60	}
	61
5e541973	62	static inline void pgd_free(struct mm_struct mm, pgd_t pgd)
1da177e4 LT	63	{
	64	free_pages((unsigned long)pgd, PGD_ORDER);
	65	}
	66
	67	static inline pte_t pte_alloc_one_kernel(struct mm_struct mm,
	68	unsigned long address)
	69	{
	70	pte_t *pte;
	71
65f84656	72	pte = (pte_t *) __get_free_pages(GFP_KERNEL\|__GFP_ZERO, PTE_ORDER);
1da177e4 LT	73
	74	return pte;
	75	}
	76
	77	static inline struct page pte_alloc_one(struct mm_struct mm,
	78	unsigned long address)
	79	{
	80	struct page *pte;
	81
65f84656	82	pte = alloc_pages(GFP_KERNEL, PTE_ORDER);
3b5b51c1 KS	83	if (!pte)
	84	return NULL;
	85	clear_highpage(pte);
	86	if (!pgtable_page_ctor(pte)) {
	87	__free_page(pte);
	88	return NULL;
2f569afd	89	}
1da177e4 LT	90	return pte;
	91	}
	92
5e541973	93	static inline void pte_free_kernel(struct mm_struct mm, pte_t pte)
1da177e4 LT	94	{
	95	free_pages((unsigned long)pte, PTE_ORDER);
	96	}
	97
2f569afd	98	static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
1da177e4	99	{
2f569afd	100	pgtable_page_dtor(pte);
1da177e4 LT	101	__free_pages(pte, PTE_ORDER);
	102	}
	103
9e1b32ca	104	#define __pte_free_tlb(tlb,pte,address) \
2f569afd MS	105	do { \
	106	pgtable_page_dtor(pte); \
	107	tlb_remove_page((tlb), pte); \
	108	} while (0)
1da177e4	109
325f8a0a	110	#ifndef __PAGETABLE_PMD_FOLDED
1da177e4	111
1da177e4 LT	112	static inline pmd_t pmd_alloc_one(struct mm_struct mm, unsigned long address)
	113	{
	114	pmd_t *pmd;
	115
65f84656	116	pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
1da177e4 LT	117	if (pmd)
	118	pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
	119	return pmd;
	120	}
	121
5e541973	122	static inline void pmd_free(struct mm_struct mm, pmd_t pmd)
1da177e4 LT	123	{
	124	free_pages((unsigned long)pmd, PMD_ORDER);
	125	}
	126
9e1b32ca	127	#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
1da177e4 LT	128
	129	#endif
	130
	131	#define check_pgt_cache() do { } while (0)
	132
6a1e5529 AN	133	extern void pagetable_init(void);
6a1e5529 AN	134
1da177e4	135	#endif /* _ASM_PGALLOC_H */