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