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tlbflush.h

/* tlbflush.h: TLB flushing functions
 *
 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * 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 */

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