PageFaultHandler.h

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef KERNEL_CORE_PROCESSOR_PAGEFAULTHANDLER_H_
#define KERNEL_CORE_PROCESSOR_PAGEFAULTHANDLER_H_

#include "pedigree/kernel/compiler.h"
#include "pedigree/kernel/processor/InterruptHandler.h"
#include "pedigree/kernel/processor/state_forward.h"
#include "pedigree/kernel/processor/types.h"
#include "pedigree/kernel/utilities/List.h"

class EXPORTED_PUBLIC MemoryTrapHandler
{
  public:
    virtual ~MemoryTrapHandler();

    virtual bool
    trap(InterruptState &state, uintptr_t address, bool bIsWrite) = 0;
};

class PageFaultHandler : private InterruptHandler
{
  public:
    inline static PageFaultHandler &instance()
    {
        return m_Instance;
    }

    bool initialise();

    void registerHandler(MemoryTrapHandler *pHandler)
    {
        m_Handlers.pushBack(pHandler);
    }

    //
    // InterruptHandler interface.
    //
    virtual void interrupt(size_t interruptNumber, InterruptState &state);

  private:
    PageFaultHandler() INITIALISATION_ONLY;

    PageFaultHandler(const PageFaultHandler &);

    List<MemoryTrapHandler *> m_Handlers;

    EXPORTED_PUBLIC static PageFaultHandler m_Instance;
};

#endif /* KERNEL_CORE_PROCESSOR_X86_PAGEFAULTHANDLER_H_ */