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C/C++ Source or Header  |  2006-08-11  |  2.0 KB  |  77 lines
  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 */
  77.