[linux.git] / include / asm-mips / 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,
	struct page *pte)
{
	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
}

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

#ifdef CONFIG_64BIT

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(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_REPEAT|__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 | __GFP_REPEAT, PTE_ORDER);
	if (pte)
		clear_highpage(pte);

	return pte;
}

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

static inline void pte_free(struct page *pte)
{
	__free_pages(pte, PTE_ORDER);
}

#define __pte_free_tlb(tlb,pte)		tlb_remove_page((tlb),(pte))

#ifdef CONFIG_32BIT

/*
 * allocating and freeing a pmd is trivial: the 1-entry pmd is
 * inside the pgd, so has no extra memory associated with it.
 */
#define pmd_free(x)			do { } while (0)
#define __pmd_free_tlb(tlb,x)		do { } while (0)

#endif

#ifdef CONFIG_64BIT

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|__GFP_REPEAT, PMD_ORDER);
	if (pmd)
		pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
	return pmd;
}

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

#define __pmd_free_tlb(tlb,x)	pmd_free(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,
	23	struct page *pte)
	24	{
	25	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
	26	}
	27
c6e8b587 RB	28	/*
	29	* Initialize a new pmd table with invalid pointers.
	30	*/
	31	extern void pmd_init(unsigned long page, unsigned long pagetable);
	32
	33	#ifdef CONFIG_64BIT
	34
	35	static inline void pud_populate(struct mm_struct mm, pud_t pud, pmd_t *pmd)
	36	{
	37	set_pud(pud, __pud((unsigned long)pmd));
	38	}
	39	#endif
	40
1da177e4 LT	41	/*
	42	* Initialize a new pgd / pmd table with invalid pointers.
	43	*/
	44	extern void pgd_init(unsigned long page);
1da177e4 LT	45
	46	static inline pgd_t pgd_alloc(struct mm_struct mm)
	47	{
	48	pgd_t ret, init;
	49
	50	ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
	51	if (ret) {
242954b5	52	init = pgd_offset(&init_mm, 0UL);
1da177e4 LT	53	pgd_init((unsigned long)ret);
	54	memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
	55	(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
	56	}
	57
	58	return ret;
	59	}
	60
	61	static inline void pgd_free(pgd_t *pgd)
	62	{
	63	free_pages((unsigned long)pgd, PGD_ORDER);
	64	}
	65
	66	static inline pte_t pte_alloc_one_kernel(struct mm_struct mm,
	67	unsigned long address)
	68	{
	69	pte_t *pte;
	70
	71	pte = (pte_t *) __get_free_pages(GFP_KERNEL\|__GFP_REPEAT\|__GFP_ZERO, PTE_ORDER);
	72
	73	return pte;
	74	}
	75
	76	static inline struct page pte_alloc_one(struct mm_struct mm,
	77	unsigned long address)
	78	{
	79	struct page *pte;
	80
	81	pte = alloc_pages(GFP_KERNEL \| __GFP_REPEAT, PTE_ORDER);
	82	if (pte)
	83	clear_highpage(pte);
	84
	85	return pte;
	86	}
	87
	88	static inline void pte_free_kernel(pte_t *pte)
	89	{
	90	free_pages((unsigned long)pte, PTE_ORDER);
	91	}
	92
	93	static inline void pte_free(struct page *pte)
	94	{
	95	__free_pages(pte, PTE_ORDER);
	96	}
	97
	98	#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
	99
875d43e7	100	#ifdef CONFIG_32BIT
1da177e4 LT	101
	102	/*
	103	* allocating and freeing a pmd is trivial: the 1-entry pmd is
	104	* inside the pgd, so has no extra memory associated with it.
	105	*/
1da177e4 LT	106	#define pmd_free(x) do { } while (0)
1da177e4 LT	107	#define __pmd_free_tlb(tlb,x) do { } while (0)
c6e8b587	108
1da177e4 LT	109	#endif
1da177e4 LT	110
875d43e7	111	#ifdef CONFIG_64BIT
1da177e4	112
1da177e4 LT	113	static inline pmd_t pmd_alloc_one(struct mm_struct mm, unsigned long address)
	114	{
	115	pmd_t *pmd;
	116
	117	pmd = (pmd_t *) __get_free_pages(GFP_KERNEL\|__GFP_REPEAT, PMD_ORDER);
	118	if (pmd)
	119	pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
	120	return pmd;
	121	}
	122
	123	static inline void pmd_free(pmd_t *pmd)
	124	{
	125	free_pages((unsigned long)pmd, PMD_ORDER);
	126	}
	127
	128	#define __pmd_free_tlb(tlb,x) pmd_free(x)
	129
	130	#endif
	131
	132	#define check_pgt_cache() do { } while (0)
	133
6a1e5529 AN	134	extern void pagetable_init(void);
6a1e5529 AN	135
1da177e4	136	#endif /* _ASM_PGALLOC_H */