diff options
Diffstat (limited to 'include/asm-arm/tlb.h')
-rw-r--r-- | include/asm-arm/tlb.h | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/include/asm-arm/tlb.h b/include/asm-arm/tlb.h deleted file mode 100644 index 36bd402a21cb..000000000000 --- a/include/asm-arm/tlb.h +++ /dev/null | |||
@@ -1,94 +0,0 @@ | |||
1 | /* | ||
2 | * linux/include/asm-arm/tlb.h | ||
3 | * | ||
4 | * Copyright (C) 2002 Russell King | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License version 2 as | ||
8 | * published by the Free Software Foundation. | ||
9 | * | ||
10 | * Experimentation shows that on a StrongARM, it appears to be faster | ||
11 | * to use the "invalidate whole tlb" rather than "invalidate single | ||
12 | * tlb" for this. | ||
13 | * | ||
14 | * This appears true for both the process fork+exit case, as well as | ||
15 | * the munmap-large-area case. | ||
16 | */ | ||
17 | #ifndef __ASMARM_TLB_H | ||
18 | #define __ASMARM_TLB_H | ||
19 | |||
20 | #include <asm/cacheflush.h> | ||
21 | #include <asm/tlbflush.h> | ||
22 | |||
23 | #ifndef CONFIG_MMU | ||
24 | |||
25 | #include <linux/pagemap.h> | ||
26 | #include <asm-generic/tlb.h> | ||
27 | |||
28 | #else /* !CONFIG_MMU */ | ||
29 | |||
30 | #include <asm/pgalloc.h> | ||
31 | |||
32 | /* | ||
33 | * TLB handling. This allows us to remove pages from the page | ||
34 | * tables, and efficiently handle the TLB issues. | ||
35 | */ | ||
36 | struct mmu_gather { | ||
37 | struct mm_struct *mm; | ||
38 | unsigned int fullmm; | ||
39 | }; | ||
40 | |||
41 | DECLARE_PER_CPU(struct mmu_gather, mmu_gathers); | ||
42 | |||
43 | static inline struct mmu_gather * | ||
44 | tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush) | ||
45 | { | ||
46 | struct mmu_gather *tlb = &get_cpu_var(mmu_gathers); | ||
47 | |||
48 | tlb->mm = mm; | ||
49 | tlb->fullmm = full_mm_flush; | ||
50 | |||
51 | return tlb; | ||
52 | } | ||
53 | |||
54 | static inline void | ||
55 | tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end) | ||
56 | { | ||
57 | if (tlb->fullmm) | ||
58 | flush_tlb_mm(tlb->mm); | ||
59 | |||
60 | /* keep the page table cache within bounds */ | ||
61 | check_pgt_cache(); | ||
62 | |||
63 | put_cpu_var(mmu_gathers); | ||
64 | } | ||
65 | |||
66 | #define tlb_remove_tlb_entry(tlb,ptep,address) do { } while (0) | ||
67 | |||
68 | /* | ||
69 | * In the case of tlb vma handling, we can optimise these away in the | ||
70 | * case where we're doing a full MM flush. When we're doing a munmap, | ||
71 | * the vmas are adjusted to only cover the region to be torn down. | ||
72 | */ | ||
73 | static inline void | ||
74 | tlb_start_vma(struct mmu_gather *tlb, struct vm_area_struct *vma) | ||
75 | { | ||
76 | if (!tlb->fullmm) | ||
77 | flush_cache_range(vma, vma->vm_start, vma->vm_end); | ||
78 | } | ||
79 | |||
80 | static inline void | ||
81 | tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vma) | ||
82 | { | ||
83 | if (!tlb->fullmm) | ||
84 | flush_tlb_range(vma, vma->vm_start, vma->vm_end); | ||
85 | } | ||
86 | |||
87 | #define tlb_remove_page(tlb,page) free_page_and_swap_cache(page) | ||
88 | #define pte_free_tlb(tlb, ptep) pte_free((tlb)->mm, ptep) | ||
89 | #define pmd_free_tlb(tlb, pmdp) pmd_free((tlb)->mm, pmdp) | ||
90 | |||
91 | #define tlb_migrate_finish(mm) do { } while (0) | ||
92 | |||
93 | #endif /* CONFIG_MMU */ | ||
94 | #endif | ||