i82094aa.hh revision 14295:16025a55b380 
1/*
2 * Copyright (c) 2008 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Gabe Black
29 */
30
31#ifndef __DEV_X86_I82094AA_HH__
32#define __DEV_X86_I82094AA_HH__
33
34#include <map>
35
36#include "base/bitunion.hh"
37#include "dev/x86/intdev.hh"
38#include "dev/intpin.hh"
39#include "dev/io_device.hh"
40#include "params/I82094AA.hh"
41
42namespace X86ISA
43{
44
45class I8259;
46class Interrupts;
47
48class I82094AA : public BasicPioDevice, public IntDevice
49{
50  public:
51    BitUnion64(RedirTableEntry)
52        Bitfield<63, 32> topDW;
53        Bitfield<55, 32> topReserved;
54        Bitfield<31, 0> bottomDW;
55        Bitfield<31, 17> bottomReserved;
56        Bitfield<63, 56> dest;
57        Bitfield<16> mask;
58        Bitfield<15> trigger;
59        Bitfield<14> remoteIRR;
60        Bitfield<13> polarity;
61        Bitfield<12> deliveryStatus;
62        Bitfield<11> destMode;
63        Bitfield<10, 8> deliveryMode;
64        Bitfield<7, 0> vector;
65    EndBitUnion(RedirTableEntry)
66
67  protected:
68    I8259 * extIntPic;
69
70    uint8_t regSel;
71    uint8_t initialApicId;
72    uint8_t id;
73    uint8_t arbId;
74
75    uint64_t lowestPriorityOffset;
76
77    static const uint8_t TableSize = 24;
78    // This implementation is based on version 0x11, but 0x14 avoids having
79    // to deal with the arbitration and APIC bus guck.
80    static const uint8_t APICVersion = 0x14;
81
82    RedirTableEntry redirTable[TableSize];
83    bool pinStates[TableSize];
84
85    std::vector<IntSinkPin<I82094AA> *> inputs;
86
87  public:
88    typedef I82094AAParams Params;
89
90    const Params *
91    params() const
92    {
93        return dynamic_cast<const Params *>(_params);
94    }
95
96    I82094AA(Params *p);
97
98    void init() override;
99
100    Tick read(PacketPtr pkt) override;
101    Tick write(PacketPtr pkt) override;
102
103    void writeReg(uint8_t offset, uint32_t value);
104    uint32_t readReg(uint8_t offset);
105
106    Port &getPort(const std::string &if_name,
107                  PortID idx=InvalidPortID) override;
108
109    bool recvResponse(PacketPtr pkt) override;
110
111    void signalInterrupt(int line);
112    void raiseInterruptPin(int number);
113    void lowerInterruptPin(int number);
114
115    void serialize(CheckpointOut &cp) const override;
116    void unserialize(CheckpointIn &cp) override;
117};
118
119} // namespace X86ISA
120
121#endif //__DEV_X86_SOUTH_BRIDGE_I8254_HH__
122