src/system/kernel/arch/x86/paging/X86VMTranslationMap.h

   1 /*
   2  * Copyright 2010, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef KERNEL_ARCH_X86_X86_VM_TRANSLATION_MAP_H
   6 #define KERNEL_ARCH_X86_X86_VM_TRANSLATION_MAP_H
   7
   8
   9 #include <vm/VMTranslationMap.h>
  10
  11
  12 #if __GNUC__ < 4
  13 #define final
  14 #endif
  15
  16
  17 #define PAGE_INVALIDATE_CACHE_SIZE 64
  18
  19
  20 struct X86PagingStructures;
  21 class TranslationMapPhysicalPageMapper;
  22
  23
  24 struct X86VMTranslationMap : VMTranslationMap {
  25                                                                 X86VMTranslationMap();
  26         virtual                                         ~X86VMTranslationMap();
  27
  28                         status_t                        Init(bool kernel);
  29
  30         virtual bool                            Lock() final;
  31         virtual void                            Unlock() final;
  32
  33         virtual addr_t                          MappedSize() const final;
  34
  35         virtual void                            Flush() final;
  36
  37         virtual X86PagingStructures* PagingStructures() const = 0;
  38
  39         inline  void                            InvalidatePage(addr_t address);
  40
  41 protected:
  42                         TranslationMapPhysicalPageMapper* fPageMapper;
  43                         int                                     fInvalidPagesCount;
  44                         addr_t                          fInvalidPages[PAGE_INVALIDATE_CACHE_SIZE];
  45                         bool                            fIsKernelMap;
  46 };
  47
  48
  49 void
  50 X86VMTranslationMap::InvalidatePage(addr_t address)
  51 {
  52         if (fInvalidPagesCount < PAGE_INVALIDATE_CACHE_SIZE)
  53                 fInvalidPages[fInvalidPagesCount] = address;
  54
  55         fInvalidPagesCount++;
  56 }
  57
  58
  59 #endif  // KERNEL_ARCH_X86_X86_VM_TRANSLATION_MAP_H