| /* |
| * 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 */ |