/*
 * Copyright 2010, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */
#ifndef KERNEL_ARCH_X86_X86_VM_TRANSLATION_MAP_H
#define KERNEL_ARCH_X86_X86_VM_TRANSLATION_MAP_H


#include <vm/VMTranslationMap.h>


#define PAGE_INVALIDATE_CACHE_SIZE 64


struct X86PagingStructures;
class TranslationMapPhysicalPageMapper;


struct X86VMTranslationMap : VMTranslationMap {
                                                                X86VMTranslationMap();
        virtual                                         ~X86VMTranslationMap();

                        status_t                        Init(bool kernel);

        virtual bool                            Lock() final;
        virtual void                            Unlock() final;

        virtual addr_t                          MappedSize() const final;

        virtual void                            Flush() final;

        virtual X86PagingStructures* PagingStructures() const = 0;

        inline  void                            InvalidatePage(addr_t address);

protected:
                        TranslationMapPhysicalPageMapper* fPageMapper;
                        int                                     fInvalidPagesCount;
                        addr_t                          fInvalidPages[PAGE_INVALIDATE_CACHE_SIZE];
                        bool                            fIsKernelMap;
};


void
X86VMTranslationMap::InvalidatePage(addr_t address)
{
        if (fInvalidPagesCount < PAGE_INVALIDATE_CACHE_SIZE)
                fInvalidPages[fInvalidPagesCount] = address;

        fInvalidPagesCount++;
}


#endif  // KERNEL_ARCH_X86_X86_VM_TRANSLATION_MAP_H