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/mm.h>
16#include <asm/processor.h>
17
18#ifdef CONFIG_MMU
19
20#ifndef __ASSEMBLY__
21extern void asmlinkage __flush_tlb_all(void);
22extern void asmlinkage __flush_tlb_mm(unsigned long contextid);
23extern void asmlinkage __flush_tlb_page(unsigned long contextid, unsigned long start);
24extern void asmlinkage __flush_tlb_range(unsigned long contextid,
25					 unsigned long start, unsigned long end);
26#endif /* !__ASSEMBLY__ */
27
28#define flush_tlb_all()				\
29do {						\
30	preempt_disable();			\
31	__flush_tlb_all();			\
32	preempt_enable();			\
33} while(0)
34
35#define flush_tlb_mm(mm)			\
36do {						\
37	preempt_disable();			\
38	__flush_tlb_mm((mm)->context.id);	\
39	preempt_enable();			\
40} while(0)
41
42#define flush_tlb_range(vma,start,end)					\
43do {									\
44	preempt_disable();						\
45	__flush_tlb_range((vma)->vm_mm->context.id, start, end);	\
46	preempt_enable();						\
47} while(0)
48
49#define flush_tlb_page(vma,addr)				\
50do {								\
51	preempt_disable();					\
52	__flush_tlb_page((vma)->vm_mm->context.id, addr);	\
53	preempt_enable();					\
54} while(0)
55
56
57#define __flush_tlb_global()			flush_tlb_all()
58#define flush_tlb()				flush_tlb_all()
59#define flush_tlb_kernel_range(start, end)	flush_tlb_all()
60
61#else
62
63#define flush_tlb()				BUG()
64#define flush_tlb_all()				BUG()
65#define flush_tlb_mm(mm)			BUG()
66#define flush_tlb_page(vma,addr)		BUG()
67#define flush_tlb_range(mm,start,end)		BUG()
68#define flush_tlb_kernel_range(start, end)	BUG()
69
70#endif
71
72
73#endif /* _ASM_TLBFLUSH_H */
74