/arch/mips/include/asm/pgalloc.h

  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
 12#include <linux/highmem.h>
 13#include <linux/mm.h>
 14#include <linux/sched.h>
 15
 16#include <asm-generic/pgalloc.h>	/* for pte_{alloc,free}_one */
 17
 18static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
 19	pte_t *pte)
 20{
 21	set_pmd(pmd, __pmd((unsigned long)pte));
 22}
 23
 24static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
 25	pgtable_t pte)
 26{
 27	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
 28}
 29#define pmd_pgtable(pmd) pmd_page(pmd)
 30
 31/*
 32 * Initialize a new pmd table with invalid pointers.
 33 */
 34extern void pmd_init(unsigned long page, unsigned long pagetable);
 35
 36#ifndef __PAGETABLE_PMD_FOLDED
 37
 38static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
 39{
 40	set_pud(pud, __pud((unsigned long)pmd));
 41}
 42#endif
 43
 44/*
 45 * Initialize a new pgd / pmd table with invalid pointers.
 46 */
 47extern void pgd_init(unsigned long page);
 48extern pgd_t *pgd_alloc(struct mm_struct *mm);
 49
 50static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
 51{
 52	free_pages((unsigned long)pgd, PGD_ORDER);
 53}
 54
 55#define __pte_free_tlb(tlb,pte,address)			\
 56do {							\
 57	pgtable_pte_page_dtor(pte);			\
 58	tlb_remove_page((tlb), pte);			\
 59} while (0)
 60
 61#ifndef __PAGETABLE_PMD_FOLDED
 62
 63static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
 64{
 65	pmd_t *pmd;
 66
 67	pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER);
 68	if (pmd)
 69		pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
 70	return pmd;
 71}
 72
 73static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
 74{
 75	free_pages((unsigned long)pmd, PMD_ORDER);
 76}
 77
 78#define __pmd_free_tlb(tlb, x, addr)	pmd_free((tlb)->mm, x)
 79
 80#endif
 81
 82#ifndef __PAGETABLE_PUD_FOLDED
 83
 84static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
 85{
 86	pud_t *pud;
 87
 88	pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER);
 89	if (pud)
 90		pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table);
 91	return pud;
 92}
 93
 94static inline void pud_free(struct mm_struct *mm, pud_t *pud)
 95{
 96	free_pages((unsigned long)pud, PUD_ORDER);
 97}
 98
 99static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
100{
101	set_p4d(p4d, __p4d((unsigned long)pud));
102}
103
104#define __pud_free_tlb(tlb, x, addr)	pud_free((tlb)->mm, x)
105
106#endif /* __PAGETABLE_PUD_FOLDED */
107
108extern void pagetable_init(void);
109
110#endif /* _ASM_PGALLOC_H */