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
6 * Copyright (C) 1994 - 2001 by Ralf Baechle at alii
7 * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
10 #define _ASM_PGALLOC_H
12 #include <linux/config.h>
13 #include <linux/highmem.h>
17 #define check_pgt_cache() do { } while (0)
19 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
22 set_pmd(pmd, __pmd(__pa(pte)));
25 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
28 set_pmd(pmd, __pmd((PAGE_OFFSET + page_to_pfn(pte)) << PAGE_SHIFT));
31 #define pgd_populate(mm, pgd, pmd) set_pgd(pgd, __pgd(pmd))
33 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
37 ret = (pgd_t *) __get_free_pages(GFP_KERNEL, 1);
39 init = pgd_offset(&init_mm, 0);
40 pgd_init((unsigned long)ret);
41 memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
42 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
48 static inline void pgd_free(pgd_t *pgd)
50 free_pages((unsigned long)pgd, PGD_ORDER);
53 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
54 unsigned long address)
58 pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT,
66 static inline struct page *pte_alloc_one(struct mm_struct *mm,
67 unsigned long address)
71 pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);
78 static inline void pte_free_kernel(pte_t *pte)
80 free_pages((unsigned long)pte, PTE_ORDER);
83 static inline void pte_free(struct page *pte)
85 __free_pages(pte, PTE_ORDER);
88 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
89 #define __pmd_free_tlb(tlb,x) do { } while (0)
91 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
95 pmd = (pmd_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT, PMD_ORDER);
97 pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);
101 static inline void pmd_free(pmd_t *pmd)
103 free_pages((unsigned long)pmd, PMD_ORDER);
106 extern pte_t kptbl[(PAGE_SIZE << PGD_ORDER)/sizeof(pte_t)];
107 extern pmd_t kpmdtbl[PTRS_PER_PMD];
109 #endif /* _ASM_PGALLOC_H */