kernel/core/processor/x86/InterruptManager.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_PROCESSOR_X86_INTERRUPTMANAGER_H
#define KERNEL_PROCESSOR_X86_INTERRUPTMANAGER_H

#include "pedigree/kernel/Spinlock.h"
#include "pedigree/kernel/compiler.h"
#include "pedigree/kernel/processor/InterruptManager.h"
#include "pedigree/kernel/processor/SyscallManager.h"
#include "pedigree/kernel/processor/types.h"

class X86InterruptManager : public ::InterruptManager, public ::SyscallManager
{
  public:
    inline static X86InterruptManager &instance()
    {
        return m_Instance;
    }

    //
    // InterruptManager Interface
    //
    virtual bool registerInterruptHandler(
        size_t nInterruptNumber, InterruptHandler *pHandler);

#ifdef DEBUGGER
    virtual bool registerInterruptHandlerDebugger(
        size_t nInterruptNumber, InterruptHandler *pHandler);
    virtual size_t getBreakpointInterruptNumber() PURE;
    virtual size_t getDebugInterruptNumber() PURE;
#endif

    //
    // SyscallManager Interface
    //
    virtual bool
    registerSyscallHandler(Service_t Service, SyscallHandler *pHandler);

    virtual uintptr_t syscall(
        Service_t service, uintptr_t function, uintptr_t p1 = 0,
        uintptr_t p2 = 0, uintptr_t p3 = 0, uintptr_t p4 = 0, uintptr_t p5 = 0);

    static void initialiseProcessor() INITIALISATION_ONLY;

  private:
    static void interrupt(InterruptState &interruptState);

    void setInterruptGate(
        size_t nInterruptNumber, uintptr_t interruptHandler,
        bool bUserspace) INITIALISATION_ONLY;
    void
    setTaskGate(size_t nInterruptNumber, uint16_t tssSeg) INITIALISATION_ONLY;
    X86InterruptManager() INITIALISATION_ONLY;
    X86InterruptManager(const X86InterruptManager &);
    X86InterruptManager &operator=(const X86InterruptManager &);
    virtual ~X86InterruptManager();

    struct GateDescriptor
    {
        uint16_t offset0;
        uint16_t selector;
        uint8_t res;
        uint8_t flags;
        uint16_t offset1;
    } PACKED;

    GateDescriptor m_IDT[256];
    InterruptHandler *m_pHandler[256];
#ifdef DEBUGGER

    InterruptHandler *m_pDbgHandler[256];
#endif

    SyscallHandler *m_pSyscallHandler[serviceEnd];

    Spinlock m_Lock;

    static X86InterruptManager m_Instance;
};

#endif