tlbflush.h

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/* tlbflush.h: TLB flushing functions
 *
 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#ifndef _ASM_TLBFLUSH_H
#define _ASM_TLBFLUSH_H

#include <linux/mm.h>
#include <asm/processor.h>

#ifdef CONFIG_MMU

#ifndef __ASSEMBLY__
extern void asmlinkage __flush_tlb_all(void);
extern void asmlinkage __flush_tlb_mm(unsigned long contextid);
extern void asmlinkage __flush_tlb_page(unsigned long contextid, unsigned long start);
extern void asmlinkage __flush_tlb_range(unsigned long contextid,
                     unsigned long start, unsigned long end);
#endif /* !__ASSEMBLY__ */

#define flush_tlb_all()             \
do {                        \
    preempt_disable();          \
    __flush_tlb_all();          \
    preempt_enable();           \
} while(0)

#define flush_tlb_mm(mm)            \
do {                        \
    preempt_disable();          \
    __flush_tlb_mm((mm)->context.id);   \
    preempt_enable();           \
} while(0)

#define flush_tlb_range(vma,start,end)                  \
do {                                    \
    preempt_disable();                      \
    __flush_tlb_range((vma)->vm_mm->context.id, start, end);    \
    preempt_enable();                       \
} while(0)

#define flush_tlb_page(vma,addr)                \
do {                                \
    preempt_disable();                  \
    __flush_tlb_page((vma)->vm_mm->context.id, addr);   \
    preempt_enable();                   \
} while(0)


#define __flush_tlb_global()            flush_tlb_all()
#define flush_tlb()             flush_tlb_all()
#define flush_tlb_kernel_range(start, end)  flush_tlb_all()

#else

#define flush_tlb()             BUG()
#define flush_tlb_all()             BUG()
#define flush_tlb_mm(mm)            BUG()
#define flush_tlb_page(vma,addr)        BUG()
#define flush_tlb_range(mm,start,end)       BUG()
#define flush_tlb_kernel_range(start, end)  BUG()

#endif


#endif /* _ASM_TLBFLUSH_H */