/arch/mn10300/include/asm/tlbflush.h

 1/* MN10300 TLB flushing functions
 2 *
 3 * Copyright (C) 2007 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 Licence
 8 * as published by the Free Software Foundation; either version
 9 * 2 of the Licence, or (at your option) any later version.
10 */
11#ifndef _ASM_TLBFLUSH_H
12#define _ASM_TLBFLUSH_H
13
14#include <asm/processor.h>
15
16#define __flush_tlb()						\
17do {								\
18	int w;							\
19	__asm__ __volatile__					\
20		("	mov %1,%0		\n"		\
21		 "	or %2,%0		\n"		\
22		 "	mov %0,%1		\n"		\
23		 : "=d"(w)					\
24		 : "m"(MMUCTR), "i"(MMUCTR_IIV|MMUCTR_DIV)	\
25		 : "cc", "memory"				\
26		 );						\
27} while (0)
28
29#define __flush_tlb_all() __flush_tlb()
30#define __flush_tlb_one(addr) __flush_tlb()
31
32
33/*
34 * TLB flushing:
35 *
36 *  - flush_tlb() flushes the current mm struct TLBs
37 *  - flush_tlb_all() flushes all processes TLBs
38 *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
39 *  - flush_tlb_page(vma, vmaddr) flushes one page
40 *  - flush_tlb_range(mm, start, end) flushes a range of pages
41 *  - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
42 */
43#define flush_tlb_all()				\
44do {						\
45	preempt_disable();			\
46	__flush_tlb_all();			\
47	preempt_enable();			\
48} while (0)
49
50#define flush_tlb_mm(mm)			\
51do {						\
52	preempt_disable();			\
53	__flush_tlb_all();			\
54	preempt_enable();			\
55} while (0)
56
57#define flush_tlb_range(vma, start, end)			\
58do {								\
59	unsigned long __s __attribute__((unused)) = (start);	\
60	unsigned long __e __attribute__((unused)) = (end);	\
61	preempt_disable();					\
62	__flush_tlb_all();					\
63	preempt_enable();					\
64} while (0)
65
66
67#define __flush_tlb_global()			flush_tlb_all()
68#define flush_tlb()				flush_tlb_all()
69#define flush_tlb_kernel_range(start, end)			\
70do {								\
71	unsigned long __s __attribute__((unused)) = (start);	\
72	unsigned long __e __attribute__((unused)) = (end);	\
73	flush_tlb_all();					\
74} while (0)
75
76extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr);
77
78#define flush_tlb_pgtables(mm, start, end)	do {} while (0)
79
80#endif /* _ASM_TLBFLUSH_H */