tsunami_cchip.hh

来自「M5,一个功能强大的多处理器系统模拟器.很多针对处理器架构,性能的研究都使用它作」· HH 代码 · 共 152 行

/*
 * Copyright (c) 2004, 2005
 * The Regents of The University of Michigan
 * All Rights Reserved
 *
 * This code is part of the M5 simulator.
 *
 * Permission is granted to use, copy, create derivative works and
 * redistribute this software and such derivative works for any
 * purpose, so long as the copyright notice above, this grant of
 * permission, and the disclaimer below appear in all copies made; and
 * so long as the name of The University of Michigan is not used in
 * any advertising or publicity pertaining to the use or distribution
 * of this software without specific, written prior authorization.
 *
 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE
 * UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND
 * WITHOUT WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE. THE REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE
 * LIABLE FOR ANY DAMAGES, INCLUDING DIRECT, SPECIAL, INDIRECT,
 * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN
 * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGES.
 *
 * Authors: Ali G. Saidi
 */

/** @file
 * Emulation of the Tsunami CChip CSRs
 */

#ifndef __TSUNAMI_CCHIP_HH__
#define __TSUNAMI_CCHIP_HH__

#include "base/range.hh"
#include "dev/alpha/tsunami.hh"
#include "dev/io_device.hh"
#include "params/TsunamiCChip.hh"

/**
 * Tsunami CChip CSR Emulation. This device includes all the interrupt
 * handling code for the chipset.
 */
class TsunamiCChip : public BasicPioDevice
{
  protected:
    /**
     * pointer to the tsunami object.
     * This is our access to all the other tsunami
     * devices.
     */
    Tsunami *tsunami;

    /**
     * The dims are device interrupt mask registers.
     * One exists for each CPU, the DRIR X DIM = DIR
     */
    uint64_t dim[Tsunami::Max_CPUs];

    /**
     * The dirs are device interrupt registers.
     * One exists for each CPU, the DRIR X DIM = DIR
     */
    uint64_t dir[Tsunami::Max_CPUs];

    /**
     * This register contains bits for each PCI interrupt
     * that can occur.
     */
    uint64_t drir;

    /** Indicator of which CPUs have an IPI interrupt */
    uint64_t ipint;

    /** Indicator of which CPUs have an RTC interrupt */
    uint64_t itint;

  public:
    typedef TsunamiCChipParams Params;
    /**
     * Initialize the Tsunami CChip by setting all of the
     * device register to 0.
     * @param p params struct
     */
    TsunamiCChip(const Params *p);

    const Params *
    params() const
    {
        return dynamic_cast<const Params *>(_params);
    }

    virtual Tick read(PacketPtr pkt);

    virtual Tick write(PacketPtr pkt);

    /**
     * post an RTC interrupt to the CPU
     */
    void postRTC();

    /**
     * post an interrupt to the CPU.
     * @param interrupt the interrupt number to post (0-64)
     */
    void postDRIR(uint32_t interrupt);

    /**
     * clear an interrupt previously posted to the CPU.
     * @param interrupt the interrupt number to post (0-64)
     */
    void clearDRIR(uint32_t interrupt);

    /**
     * post an ipi interrupt  to the CPU.
     * @param ipintr the cpu number to clear(bitvector)
     */
    void clearIPI(uint64_t ipintr);

    /**
     * clear a timer interrupt previously posted to the CPU.
     * @param itintr the cpu number to clear(bitvector)
     */
    void clearITI(uint64_t itintr);

    /**
     * request an interrupt be posted to the CPU.
     * @param ipreq the cpu number to interrupt(bitvector)
     */
    void reqIPI(uint64_t ipreq);


    /**
     * Serialize this object to the given output stream.
     * @param os The stream to serialize to.
     */
    virtual void serialize(std::ostream &os);

    /**
     * Reconstruct the state of this object from a checkpoint.
     * @param cp The checkpoint use.
     * @param section The section name of this object
     */
    virtual void unserialize(Checkpoint *cp, const std::string &section);

};

#endif // __TSUNAMI_CCHIP_HH__