2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
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.
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.
31 #ifndef __DEV_X86_I8259_HH__
32 #define __DEV_X86_I8259_HH__
34 #include "dev/x86/intdev.hh"
35 #include "dev/io_device.hh"
36 #include "enums/X86I8259CascadeMode.hh"
37 #include "params/I8259.hh"
42 class I8259 : public BasicPioDevice, public IntDev
45 static const int NumLines = 8;
46 bool pinStates[NumLines];
50 Enums::X86I8259CascadeMode mode;
53 // Interrupt Request Register
55 // In Service Register
57 // Interrupt Mask Register
60 // The higher order bits of the vector to return
64 // A bit vector of lines with slaves attached, or the slave id, depending
65 // on if this is a master or slave PIC.
71 // State machine information for reading in initialization control words.
75 // Whether or not the PIC is in auto EOI mode.
78 void requestInterrupt(int line);
79 void handleEOI(int line);
82 typedef I8259Params Params;
87 return dynamic_cast<const Params *>(_params);
92 Tick read(PacketPtr pkt);
93 Tick write(PacketPtr pkt);
107 void signalInterrupt(int line);
108 void raiseInterruptPin(int number);
109 void lowerInterruptPin(int number);
112 virtual void serialize(std::ostream &os);
113 virtual void unserialize(Checkpoint *cp, const std::string §ion);
116 } // namespace X86ISA
118 #endif //__DEV_X86_I8259_HH__