gic_v2m.hh

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/*
 * Copyright (c) 2013 ARM Limited
 * All rights reserved
 *
 * The license below extends only to copyright in the software and shall
 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
 * terms below provided that you ensure that this notice is replicated
 * unmodified and in its entirety in all distributions of the software,
 * modified or unmodified, in source code or in binary form.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
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 * this software without specific prior written permission.
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#ifndef __DEV_ARM_GIC_V2M_H__
#define __DEV_ARM_GIC_V2M_H__
 
#include "base/bitunion.hh"
#include "dev/arm/base_gic.hh"
#include "dev/io_device.hh"
#include "dev/platform.hh"
#include "params/Gicv2m.hh"
#include "params/Gicv2mFrame.hh"
 
namespace gem5
{

class Gicv2mFrame : public SimObject
{
  public:
    const Addr          addr;
    const unsigned int  spi_base;
    const unsigned int  spi_len;
 
    typedef Gicv2mFrameParams Params;
    Gicv2mFrame(const Params &p) :
        SimObject(p), addr(p.addr), spi_base(p.spi_base), spi_len(p.spi_len)
    {}
};
 
class Gicv2m : public PioDevice
{
  private:
    static const int FRAME_SIZE         = 0x10000;
 
    static const int MSI_TYPER          = 0x0008;
    static const int MSI_SETSPI_NSR     = 0x0040;
    static const int PER_ID4            = 0x0fd0;

    const Tick pioDelay;

    std::vector<Gicv2mFrame *> frames;

    BaseGic *gic;

    unsigned int log2framenum;
 
  public:
    typedef Gicv2mParams Params;
    Gicv2m(const Params &p);

    virtual AddrRangeList getAddrRanges() const;

    virtual Tick read(PacketPtr pkt);

    virtual Tick write(PacketPtr pkt);
 
  private:
    int frameFromAddr(Addr a) const;
};
 
} // namespace gem5
 
#endif //__DEV_ARM_GIC_V2M_H__