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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
*/
/** @file
* Implementation of PC platform.
*/
#include <deque>
#include <string>
#include <vector>
#include "arch/x86/intmessage.hh"
#include "arch/x86/x86_traits.hh"
#include "config/the_isa.hh"
#include "cpu/intr_control.hh"
#include "dev/x86/i82094aa.hh"
#include "dev/x86/i8254.hh"
#include "dev/x86/i8259.hh"
#include "dev/x86/pc.hh"
#include "dev/x86/south_bridge.hh"
#include "dev/terminal.hh"
#include "sim/system.hh"
using namespace std;
using namespace TheISA;
Pc::Pc(const Params *p)
: Platform(p), system(p->system)
{
southBridge = NULL;
}
void
Pc::init()
{
assert(southBridge);
/*
* Initialize the timer.
*/
I8254 & timer = *southBridge->pit;
//Timer 0, mode 2, no bcd, 16 bit count
timer.writeControl(0x34);
//Timer 0, latch command
timer.writeControl(0x00);
//Write a 16 bit count of 0
timer.writeCounter(0, 0);
timer.writeCounter(0, 0);
/*
* Initialize the I/O APIC.
*/
I82094AA & ioApic = *southBridge->ioApic;
I82094AA::RedirTableEntry entry = 0;
entry.deliveryMode = DeliveryMode::ExtInt;
entry.vector = 0x20;
ioApic.writeReg(0x10, entry.bottomDW);
ioApic.writeReg(0x11, entry.topDW);
entry.deliveryMode = DeliveryMode::Fixed;
entry.vector = 0x24;
ioApic.writeReg(0x18, entry.bottomDW);
ioApic.writeReg(0x19, entry.topDW);
entry.mask = 1;
entry.vector = 0x21;
ioApic.writeReg(0x12, entry.bottomDW);
ioApic.writeReg(0x13, entry.topDW);
entry.vector = 0x20;
ioApic.writeReg(0x14, entry.bottomDW);
ioApic.writeReg(0x15, entry.topDW);
entry.vector = 0x28;
ioApic.writeReg(0x20, entry.bottomDW);
ioApic.writeReg(0x21, entry.topDW);
entry.vector = 0x2C;
ioApic.writeReg(0x28, entry.bottomDW);
ioApic.writeReg(0x29, entry.topDW);
entry.vector = 0x2E;
ioApic.writeReg(0x2C, entry.bottomDW);
ioApic.writeReg(0x2D, entry.topDW);
entry.vector = 0x30;
ioApic.writeReg(0x30, entry.bottomDW);
ioApic.writeReg(0x31, entry.topDW);
/*
* Mask the PICs. I'm presuming the BIOS/bootloader would have cleared
* these out and masked them before passing control to the OS.
*/
southBridge->pic1->maskAll();
southBridge->pic2->maskAll();
}
void
Pc::postConsoleInt()
{
southBridge->ioApic->signalInterrupt(4);
southBridge->pic1->signalInterrupt(4);
}
void
Pc::clearConsoleInt()
{
warn_once("Don't know what interrupt to clear for console.\n");
//panic("Need implementation\n");
}
void
Pc::postPciInt(int line)
{
southBridge->ioApic->signalInterrupt(line);
}
void
Pc::clearPciInt(int line)
{
warn_once("Tried to clear PCI interrupt %d\n", line);
}
Pc *
PcParams::create()
{
return new Pc(this);
}
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