| /* |
| * 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. |
| */ |
| |
| /** @file |
| * Implementation of PC platform. |
| */ |
| |
| #include "dev/x86/pc.hh" |
| |
| #include "arch/x86/intmessage.hh" |
| #include "arch/x86/x86_traits.hh" |
| #include "dev/x86/i82094aa.hh" |
| #include "dev/x86/i8254.hh" |
| #include "dev/x86/i8259.hh" |
| #include "dev/x86/south_bridge.hh" |
| #include "sim/system.hh" |
| |
| Pc::Pc(const Params &p) : Platform(p), southBridge(p.south_bridge) |
| {} |
| |
| void |
| Pc::init() |
| { |
| assert(southBridge); |
| |
| /* |
| * Initialize the timer. |
| */ |
| auto &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. |
| */ |
| X86ISA::I82094AA &ioApic = *southBridge->ioApic; |
| X86ISA::I82094AA::RedirTableEntry entry = 0; |
| entry.deliveryMode = X86ISA::delivery_mode::ExtInt; |
| entry.vector = 0x20; |
| ioApic.writeReg(0x10, entry.bottomDW); |
| ioApic.writeReg(0x11, entry.topDW); |
| entry.deliveryMode = X86ISA::delivery_mode::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); |
| } |