i82094aa.hh revision 8746:42d3554b1c35 
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 "base/range_map.hh"
38#include "dev/x86/intdev.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 PioDevice, public IntDev
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    Tick latency;
69    Addr pioAddr;
70
71    I8259 * extIntPic;
72
73    uint8_t regSel;
74    uint8_t initialApicId;
75    uint8_t id;
76    uint8_t arbId;
77
78    uint64_t lowestPriorityOffset;
79
80    static const uint8_t TableSize = 24;
81    // This implementation is based on version 0x11, but 0x14 avoids having
82    // to deal with the arbitration and APIC bus guck.
83    static const uint8_t APICVersion = 0x14;
84
85    RedirTableEntry redirTable[TableSize];
86    bool pinStates[TableSize];
87
88  public:
89    typedef I82094AAParams Params;
90
91    const Params *
92    params() const
93    {
94        return dynamic_cast<const Params *>(_params);
95    }
96
97    I82094AA(Params *p);
98
99    void init();
100
101    Tick read(PacketPtr pkt);
102    Tick write(PacketPtr pkt);
103
104    void addressRanges(AddrRangeList &range_list)
105    {
106        range_list.clear();
107        range_list.push_back(RangeEx(pioAddr, pioAddr + 4));
108        range_list.push_back(RangeEx(pioAddr + 16, pioAddr + 20));
109    }
110
111    void getIntAddrRange(AddrRangeList &range_list)
112    {
113        range_list.clear();
114        range_list.push_back(RangeEx(x86InterruptAddress(initialApicId, 0),
115                    x86InterruptAddress(initialApicId, 0) +
116                    PhysAddrAPICRangeSize));
117    }
118
119    void writeReg(uint8_t offset, uint32_t value);
120    uint32_t readReg(uint8_t offset);
121
122    Port *getPort(const std::string &if_name, int idx = -1)
123    {
124        if (if_name == "int_port")
125            return intPort;
126        return PioDevice::getPort(if_name, idx);
127    }
128
129    void signalInterrupt(int line);
130    void raiseInterruptPin(int number);
131    void lowerInterruptPin(int number);
132
133    virtual void serialize(std::ostream &os);
134    virtual void unserialize(Checkpoint *cp, const std::string &section);
135};
136
137} // namespace X86ISA
138
139#endif //__DEV_X86_SOUTH_BRIDGE_I8254_HH__
140