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   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__
  21 extern void asmlinkage __flush_tlb_all(void);
  22 extern void asmlinkage __flush_tlb_mm(unsigned long contextid);
  23 extern void asmlinkage __flush_tlb_page(unsigned long contextid, unsigned long start);
  24 extern void asmlinkage __flush_tlb_range(unsigned long contextid,
  25                                          unsigned long start, unsigned long end);
  26 #endif /* !__ASSEMBLY__ */
  27
  28 #define flush_tlb_all()                         \
  29 do {                                            \
  30         preempt_disable();                      \
  31         __flush_tlb_all();                      \
  32         preempt_enable();                       \
  33 } while(0)
  34
  35 #define flush_tlb_mm(mm)                        \
  36 do {                                            \
  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)                                  \
  43 do {                                                                    \
  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)                                \
  50 do {                                                            \
  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 #define flush_tlb_pgtables(mm,start,end) \
  61         asm volatile("movgs %0,scr0 ! movgs %0,scr1" :: "r"(ULONG_MAX) : "memory");
  62
  63 #else
  64
  65 #define flush_tlb()                             BUG()
  66 #define flush_tlb_all()                         BUG()
  67 #define flush_tlb_mm(mm)                        BUG()
  68 #define flush_tlb_page(vma,addr)                BUG()
  69 #define flush_tlb_range(mm,start,end)           BUG()
  70 #define flush_tlb_pgtables(mm,start,end)        BUG()
  71 #define flush_tlb_kernel_range(start, end)      BUG()
  72
  73 #endif
  74
  75
  76 #endif /* _ASM_TLBFLUSH_H */