pc.cc revision 11793:ef606668d247 
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/** @file
32 * Implementation of PC platform.
33 */
34
35#include "dev/x86/pc.hh"
36
37#include <deque>
38#include <string>
39#include <vector>
40
41#include "arch/x86/intmessage.hh"
42#include "arch/x86/x86_traits.hh"
43#include "config/the_isa.hh"
44#include "cpu/intr_control.hh"
45#include "dev/terminal.hh"
46#include "dev/x86/i82094aa.hh"
47#include "dev/x86/i8254.hh"
48#include "dev/x86/i8259.hh"
49#include "dev/x86/south_bridge.hh"
50#include "sim/system.hh"
51
52using namespace std;
53using namespace TheISA;
54
55Pc::Pc(const Params *p)
56    : Platform(p), system(p->system)
57{
58    southBridge = NULL;
59}
60
61void
62Pc::init()
63{
64    assert(southBridge);
65
66    /*
67     * Initialize the timer.
68     */
69    I8254 & timer = *southBridge->pit;
70    //Timer 0, mode 2, no bcd, 16 bit count
71    timer.writeControl(0x34);
72    //Timer 0, latch command
73    timer.writeControl(0x00);
74    //Write a 16 bit count of 0
75    timer.writeCounter(0, 0);
76    timer.writeCounter(0, 0);
77
78    /*
79     * Initialize the I/O APIC.
80     */
81    I82094AA & ioApic = *southBridge->ioApic;
82    I82094AA::RedirTableEntry entry = 0;
83    entry.deliveryMode = DeliveryMode::ExtInt;
84    entry.vector = 0x20;
85    ioApic.writeReg(0x10, entry.bottomDW);
86    ioApic.writeReg(0x11, entry.topDW);
87    entry.deliveryMode = DeliveryMode::Fixed;
88    entry.vector = 0x24;
89    ioApic.writeReg(0x18, entry.bottomDW);
90    ioApic.writeReg(0x19, entry.topDW);
91    entry.mask = 1;
92    entry.vector = 0x21;
93    ioApic.writeReg(0x12, entry.bottomDW);
94    ioApic.writeReg(0x13, entry.topDW);
95    entry.vector = 0x20;
96    ioApic.writeReg(0x14, entry.bottomDW);
97    ioApic.writeReg(0x15, entry.topDW);
98    entry.vector = 0x28;
99    ioApic.writeReg(0x20, entry.bottomDW);
100    ioApic.writeReg(0x21, entry.topDW);
101    entry.vector = 0x2C;
102    ioApic.writeReg(0x28, entry.bottomDW);
103    ioApic.writeReg(0x29, entry.topDW);
104    entry.vector = 0x2E;
105    ioApic.writeReg(0x2C, entry.bottomDW);
106    ioApic.writeReg(0x2D, entry.topDW);
107    entry.vector = 0x30;
108    ioApic.writeReg(0x30, entry.bottomDW);
109    ioApic.writeReg(0x31, entry.topDW);
110
111    /*
112     * Mask the PICs. I'm presuming the BIOS/bootloader would have cleared
113     * these out and masked them before passing control to the OS.
114     */
115    southBridge->pic1->maskAll();
116    southBridge->pic2->maskAll();
117}
118
119void
120Pc::postConsoleInt()
121{
122    southBridge->ioApic->signalInterrupt(4);
123    southBridge->pic1->signalInterrupt(4);
124}
125
126void
127Pc::clearConsoleInt()
128{
129    warn_once("Don't know what interrupt to clear for console.\n");
130    //panic("Need implementation\n");
131}
132
133void
134Pc::postPciInt(int line)
135{
136    southBridge->ioApic->signalInterrupt(line);
137}
138
139void
140Pc::clearPciInt(int line)
141{
142    warn_once("Tried to clear PCI interrupt %d\n", line);
143}
144
145Pc *
146PcParams::create()
147{
148    return new Pc(this);
149}
150