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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/config.h>
  16 #include <linux/mm.h>
  17 #include <asm/processor.h>
  18
  19 #ifdef CONFIG_MMU
  20
  21 #ifndef __ASSEMBLY__
  22 extern void asmlinkage __flush_tlb_all(void);
  23 extern void asmlinkage __flush_tlb_mm(unsigned long contextid);
  24 extern void asmlinkage __flush_tlb_page(unsigned long contextid, unsigned long start);
  25 extern void asmlinkage __flush_tlb_range(unsigned long contextid,
  26                                          unsigned long start, unsigned long end);
  27 #endif /* !__ASSEMBLY__ */
  28
  29 #define flush_tlb_all()                         \
  30 do {                                            \
  31         preempt_disable();                      \
  32         __flush_tlb_all();                      \
  33         preempt_enable();                       \
  34 } while(0)
  35
  36 #define flush_tlb_mm(mm)                        \
  37 do {                                            \
  38         preempt_disable();                      \
  39         __flush_tlb_mm((mm)->context.id);       \
  40         preempt_enable();                       \
  41 } while(0)
  42
  43 #define flush_tlb_range(vma,start,end)                                  \
  44 do {                                                                    \
  45         preempt_disable();                                              \
  46         __flush_tlb_range((vma)->vm_mm->context.id, start, end);        \
  47         preempt_enable();                                               \
  48 } while(0)
  49
  50 #define flush_tlb_page(vma,addr)                                \
  51 do {                                                            \
  52         preempt_disable();                                      \
  53         __flush_tlb_page((vma)->vm_mm->context.id, addr);       \
  54         preempt_enable();                                       \
  55 } while(0)
  56
  57
  58 #define __flush_tlb_global()                    flush_tlb_all()
  59 #define flush_tlb()                             flush_tlb_all()
  60 #define flush_tlb_kernel_range(start, end)      flush_tlb_all()
  61 #define flush_tlb_pgtables(mm,start,end) \
  62         asm volatile("movgs %0,scr0 ! movgs %0,scr1" :: "r"(ULONG_MAX) : "memory");
  63
  64 #else
  65
  66 #define flush_tlb()                             BUG()
  67 #define flush_tlb_all()                         BUG()
  68 #define flush_tlb_mm(mm)                        BUG()
  69 #define flush_tlb_page(vma,addr)                BUG()
  70 #define flush_tlb_range(mm,start,end)           BUG()
  71 #define flush_tlb_pgtables(mm,start,end)        BUG()
  72 #define flush_tlb_kernel_range(start, end)      BUG()
  73
  74 #endif
  75
  76
  77 #endif /* _ASM_TLBFLUSH_H */