| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) |
| 3 | * Copyright 2003 PathScale, Inc. |
| 4 | * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h |
| 5 | * Licensed under the GPL |
| 6 | */ |
| 7 | |
| 8 | #ifndef __UM_PGALLOC_H |
| 9 | #define __UM_PGALLOC_H |
| 10 | |
| 11 | #include "linux/config.h" |
| 12 | #include "linux/mm.h" |
| 13 | #include "asm/fixmap.h" |
| 14 | |
| 15 | #define pmd_populate_kernel(mm, pmd, pte) \ |
| 16 | set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte))) |
| 17 | |
| 18 | #define pmd_populate(mm, pmd, pte) \ |
| 19 | set_pmd(pmd, __pmd(_PAGE_TABLE + \ |
| 20 | ((unsigned long long)page_to_pfn(pte) << \ |
| 21 | (unsigned long long) PAGE_SHIFT))) |
| 22 | |
| 23 | /* |
| 24 | * Allocate and free page tables. |
| 25 | */ |
| 26 | extern pgd_t *pgd_alloc(struct mm_struct *); |
| 27 | extern void pgd_free(pgd_t *pgd); |
| 28 | |
| 29 | extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); |
| 30 | extern struct page *pte_alloc_one(struct mm_struct *, unsigned long); |
| 31 | |
| 32 | static inline void pte_free_kernel(pte_t *pte) |
| 33 | { |
| 34 | free_page((unsigned long) pte); |
| 35 | } |
| 36 | |
| 37 | static inline void pte_free(struct page *pte) |
| 38 | { |
| 39 | __free_page(pte); |
| 40 | } |
| 41 | |
| 42 | #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) |
| 43 | |
| 44 | #ifdef CONFIG_3_LEVEL_PGTABLES |
| 45 | /* |
| 46 | * In the 3-level case we free the pmds as part of the pgd. |
| 47 | */ |
| 48 | #define pmd_free(x) do { } while (0) |
| 49 | #define __pmd_free_tlb(tlb,x) do { } while (0) |
| 50 | #endif |
| 51 | |
| 52 | #define check_pgt_cache() do { } while (0) |
| 53 | |
| 54 | #endif |
| 55 | |
| 56 | /* |
| 57 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 58 | * Emacs will notice this stuff at the end of the file and automatically |
| 59 | * adjust the settings for this buffer only. This must remain at the end |
| 60 | * of the file. |
| 61 | * --------------------------------------------------------------------------- |
| 62 | * Local variables: |
| 63 | * c-file-style: "linux" |
| 64 | * End: |
| 65 | */ |