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1da177e4 LT |
1 | /* tlbflush.h: TLB flushing functions |
2 | * | |
3 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #ifndef _ASM_TLBFLUSH_H | |
13 | #define _ASM_TLBFLUSH_H | |
14 | ||
15 | #include <linux/config.h> | |
16 | #include <linux/mm.h> | |
17 | #include <asm/processor.h> | |
18 | ||
19 | #ifdef CONFIG_MMU | |
20 | ||
21 | #ifndef __ASSEMBLY__ | |
22 | extern void asmlinkage __flush_tlb_all(void); | |
23 | extern void asmlinkage __flush_tlb_mm(unsigned long contextid); | |
24 | extern void asmlinkage __flush_tlb_page(unsigned long contextid, unsigned long start); | |
25 | extern void asmlinkage __flush_tlb_range(unsigned long contextid, | |
26 | unsigned long start, unsigned long end); | |
27 | #endif /* !__ASSEMBLY__ */ | |
28 | ||
29 | #define flush_tlb_all() \ | |
30 | do { \ | |
31 | preempt_disable(); \ | |
32 | __flush_tlb_all(); \ | |
33 | preempt_enable(); \ | |
34 | } while(0) | |
35 | ||
36 | #define flush_tlb_mm(mm) \ | |
37 | do { \ | |
38 | preempt_disable(); \ | |
39 | __flush_tlb_mm((mm)->context.id); \ | |
40 | preempt_enable(); \ | |
41 | } while(0) | |
42 | ||
43 | #define flush_tlb_range(vma,start,end) \ | |
44 | do { \ | |
45 | preempt_disable(); \ | |
46 | __flush_tlb_range((vma)->vm_mm->context.id, start, end); \ | |
47 | preempt_enable(); \ | |
48 | } while(0) | |
49 | ||
50 | #define flush_tlb_page(vma,addr) \ | |
51 | do { \ | |
52 | preempt_disable(); \ | |
53 | __flush_tlb_page((vma)->vm_mm->context.id, addr); \ | |
54 | preempt_enable(); \ | |
55 | } while(0) | |
56 | ||
57 | ||
58 | #define __flush_tlb_global() flush_tlb_all() | |
59 | #define flush_tlb() flush_tlb_all() | |
60 | #define flush_tlb_kernel_range(start, end) flush_tlb_all() | |
61 | #define flush_tlb_pgtables(mm,start,end) \ | |
62 | asm volatile("movgs %0,scr0 ! movgs %0,scr1" :: "r"(ULONG_MAX) : "memory"); | |
63 | ||
64 | #else | |
65 | ||
66 | #define flush_tlb() BUG() | |
67 | #define flush_tlb_all() BUG() | |
68 | #define flush_tlb_mm(mm) BUG() | |
69 | #define flush_tlb_page(vma,addr) BUG() | |
70 | #define flush_tlb_range(mm,start,end) BUG() | |
71 | #define flush_tlb_pgtables(mm,start,end) BUG() | |
72 | #define flush_tlb_kernel_range(start, end) BUG() | |
73 | ||
74 | #endif | |
75 | ||
76 | ||
77 | #endif /* _ASM_TLBFLUSH_H */ |