| 1 | |
| 2 | * Copyright (C) 2000, 2001, 2002 Jeff Dike ([email protected])
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| 3 | * Copyright 2003 PathScale, Inc.
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| 4 | * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h
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| 5 | * Licensed under the GPL
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| 6 |
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| 7 |
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| 8 | #ifndef __UM_PGALLOC_H
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| 9 | #define __UM_PGALLOC_H
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| 10 |
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| 11 | #include "linux/config.h"
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| 12 | #include "linux/mm.h"
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| 13 | #include "asm/fixmap.h"
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| 14 |
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| 15 | #define pmd_populate_kernel(mm, pmd, pte) \
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| 16 | set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
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| 17 |
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| 18 | #define pmd_populate(mm, pmd, pte) \
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| 19 | set_pmd(pmd, __pmd(_PAGE_TABLE + \
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| 20 | ((unsigned long long)page_to_pfn(pte) << \
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| 21 | (unsigned long long) PAGE_SHIFT)))
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| 22 |
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| 23 | |
| 24 | * Allocate and free page tables.
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| 25 |
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| 26 | extern pgd_t *pgd_alloc(struct mm_struct *);
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| 27 | extern void pgd_free(pgd_t *pgd);
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| 28 |
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| 29 | extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
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| 30 | extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
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| 31 |
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| 32 | static inline void pte_free_kernel(pte_t *pte)
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| 33 | {
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| 34 | free_page((unsigned long) pte);
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| 35 | }
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| 36 |
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| 37 | static inline void pte_free(struct page *pte)
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| 38 | {
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| 39 | __free_page(pte);
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| 40 | }
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| 41 |
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| 42 | #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
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| 43 |
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| 44 | #ifdef CONFIG_3_LEVEL_PGTABLES
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| 45 | |
| 46 | * In the 3-level case we free the pmds as part of the pgd.
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| 47 |
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| 48 | #define pmd_free(x) do { } while (0)
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| 49 | #define __pmd_free_tlb(tlb,x) do { } while (0)
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| 50 | #endif
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| 51 |
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| 52 | #define check_pgt_cache() do { } while (0)
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| 53 |
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| 54 | #endif
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| 55 |
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| 56 | |
| 57 | * Overrides for Emacs so that we follow Linus's tabbing style.
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| 58 | * Emacs will notice this stuff at the end of the file and automatically
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| 59 | * adjust the settings for this buffer only. This must remain at the end
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| 60 | * of the file.
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| 61 | * ---------------------------------------------------------------------------
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| 62 | * Local variables:
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| 63 | * c-file-style: "linux"
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| 64 | * End:
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| 65 |
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