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+/*
+ * Copyright (c) 2008 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * 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
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __DEV_X86_I82094AA_HH__
+#define __DEV_X86_I82094AA_HH__
+
+#include "base/bitunion.hh"
+#include "base/range_map.hh"
+#include "dev/io_device.hh"
+#include "dev/x86/intdev.hh"
+#include "params/I82094AA.hh"
+
+namespace X86ISA
+{
+
+class I8259;
+
+class I82094AA : public PioDevice, public IntDev
+{
+  public:
+    BitUnion64(RedirTableEntry)
+        Bitfield<63, 32> topDW;
+        Bitfield<55, 32> topReserved;
+        Bitfield<31, 0> bottomDW;
+        Bitfield<31, 17> bottomReserved;
+        Bitfield<63, 56> dest;
+        Bitfield<16> mask;
+        Bitfield<15> trigger;
+        Bitfield<14> remoteIRR;
+        Bitfield<13> polarity;
+        Bitfield<12> deliveryStatus;
+        Bitfield<11> destMode;
+        Bitfield<10, 8> deliveryMode;
+        Bitfield<7, 0> vector;
+    EndBitUnion(RedirTableEntry)
+
+  protected:
+    Tick latency;
+    Addr pioAddr;
+
+    I8259 * extIntPic;
+
+    uint8_t regSel;
+    uint8_t id;
+    uint8_t arbId;
+
+    static const uint8_t TableSize = 24;
+    // This implementation is based on version 0x11, but 0x14 avoids having
+    // to deal with the arbitration and APIC bus guck.
+    static const uint8_t APICVersion = 0x14;
+
+    RedirTableEntry redirTable[TableSize];
+    bool pinStates[TableSize];
+
+  public:
+    typedef I82094AAParams Params;
+
+    const Params *
+    params() const
+    {
+        return dynamic_cast<const Params *>(_params);
+    }
+
+    I82094AA(Params *p);
+
+    Tick read(PacketPtr pkt);
+    Tick write(PacketPtr pkt);
+
+    void addressRanges(AddrRangeList &range_list)
+    {
+        range_list.clear();
+        range_list.push_back(RangeEx(pioAddr, pioAddr + 4));
+        range_list.push_back(RangeEx(pioAddr + 16, pioAddr + 20));
+    }
+
+    void getIntAddrRange(AddrRangeList &range_list)
+    {
+        range_list.clear();
+        range_list.push_back(RangeEx(x86InterruptAddress(1, 0),
+                    x86InterruptAddress(1, 0) + PhysAddrAPICRangeSize));
+    }
+
+    void writeReg(uint8_t offset, uint32_t value);
+    uint32_t readReg(uint8_t offset);
+
+    Port *getPort(const std::string &if_name, int idx = -1)
+    {
+        if (if_name == "int_port")
+            return intPort;
+        return PioDevice::getPort(if_name, idx);
+    }
+
+    void signalInterrupt(int line);
+    void raiseInterruptPin(int number);
+    void lowerInterruptPin(int number);
+};
+
+}; // namespace X86ISA
+
+#endif //__DEV_X86_SOUTH_BRIDGE_I8254_HH__