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/*
* Copyright (c) 2007-2008 The Hewlett-Packard Development Company
* All rights reserved.
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* 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
*/
#include "arch/x86/linux/system.hh"
#include "arch/x86/regs/int.hh"
#include "arch/x86/isa_traits.hh"
#include "arch/vtophys.hh"
#include "base/trace.hh"
#include "cpu/thread_context.hh"
#include "mem/port_proxy.hh"
#include "params/LinuxX86System.hh"
#include "sim/byteswap.hh"
using namespace LittleEndianGuest;
using namespace X86ISA;
LinuxX86System::LinuxX86System(Params *p)
: X86System(p), commandLine(p->boot_osflags), e820Table(p->e820_table)
{
}
LinuxX86System::~LinuxX86System()
{
}
void
LinuxX86System::initState()
{
X86System::initState();
// The location of the real mode data structure.
const Addr realModeData = 0x90200;
// A port proxy to write to memory.
PortProxy* physProxy = threadContexts[0]->getPhysProxy();
/*
* Deal with the command line stuff.
*/
// A buffer to store the command line.
const Addr commandLineBuff = 0x90000;
// A pointer to the commandLineBuff stored in the real mode data.
const Addr commandLinePointer = realModeData + 0x228;
if (commandLine.length() + 1 > realModeData - commandLineBuff)
panic("Command line \"%s\" is longer than %d characters.\n",
commandLine, realModeData - commandLineBuff - 1);
physProxy->writeBlob(commandLineBuff,
(uint8_t *)commandLine.c_str(), commandLine.length() + 1);
// Generate a pointer of the right size and endianness to put into
// commandLinePointer.
uint32_t guestCommandLineBuff =
X86ISA::htog((uint32_t)commandLineBuff);
physProxy->writeBlob(commandLinePointer,
(uint8_t *)&guestCommandLineBuff, sizeof(guestCommandLineBuff));
/*
* Screen Info.
*/
// We'll skip on this for now because it's only needed for framebuffers,
// something we don't support at the moment.
/*
* EDID info
*/
// Skipping for now.
/*
* Saved video mode
*/
// Skipping for now.
/*
* Loader type.
*/
// Skipping for now.
/*
* E820 memory map
*/
// A pointer to the number of E820 entries there are.
const Addr e820MapNrPointer = realModeData + 0x1e8;
// A pointer to the buffer for E820 entries.
const Addr e820MapPointer = realModeData + 0x2d0;
e820Table->writeTo(getSystemPort(), e820MapNrPointer, e820MapPointer);
/*
* Pass the location of the real mode data structure to the kernel
* using register %esi. We'll use %rsi which should be equivalent.
*/
threadContexts[0]->setIntReg(INTREG_RSI, realModeData);
}
LinuxX86System *
LinuxX86SystemParams::create()
{
return new LinuxX86System(this);
}
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