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/*
* Copyright (c) 2007 The Hewlett-Packard Development Company
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms,
* with or without modification, are permitted provided that the
* following conditions are met:
*
* The software must be used only for Non-Commercial Use which means any
* use which is NOT directed to receiving any direct monetary
* compensation for, or commercial advantage from such use. Illustrative
* examples of non-commercial use are academic research, personal study,
* teaching, education and corporate research & development.
* Illustrative examples of commercial use are distributing products for
* commercial advantage and providing services using the software for
* commercial advantage.
*
* If you wish to use this software or functionality therein that may be
* covered by patents for commercial use, please contact:
* Director of Intellectual Property Licensing
* Office of Strategy and Technology
* Hewlett-Packard Company
* 1501 Page Mill Road
* Palo Alto, California 94304
*
* 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 HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission. No right of
* sublicense is granted herewith. Derivatives of the software and
* output created using the software may be prepared, but only for
* Non-Commercial Uses. Derivatives of the software may be shared with
* others provided: (i) the others agree to abide by the list of
* conditions herein which includes the Non-Commercial Use restrictions;
* and (ii) such Derivatives of the software include the above copyright
* notice to acknowledge the contribution from this software where
* applicable, this list of conditions and the disclaimer below.
*
* 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/intregs.hh"
#include "arch/x86/linux/system.hh"
#include "arch/vtophys.hh"
#include "base/trace.hh"
#include "cpu/thread_context.hh"
#include "mem/physical.hh"
#include "params/LinuxX86System.hh"
using namespace LittleEndianGuest;
using namespace X86ISA;
LinuxX86System::LinuxX86System(Params *p)
: X86System(p), commandLine(p->boot_osflags)
{
}
LinuxX86System::~LinuxX86System()
{
}
void
LinuxX86System::startup()
{
X86System::startup();
// The location of the real mode data structure.
const Addr realModeData = 0x90200;
// A port to write to memory.
FunctionalPort * physPort = threadContexts[0]->getPhysPort();
/*
* 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);
physPort->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);
physPort->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;
struct e820Entry
{
Addr addr;
Addr size;
uint32_t type;
};
// The size is computed this way to ensure no padding sneaks in.
int e820EntrySize =
sizeof(e820Entry().addr) +
sizeof(e820Entry().size) +
sizeof(e820Entry().type);
// I'm not sure what these should actually be. On a real machine they
// would be generated by the BIOS, and they need to reflect the regions
// which are actually available/reserved. These values are copied from
// my development machine.
e820Entry e820Map[] = {
{ULL(0x0), ULL(0x9d400), 1},
{ULL(0x9d400), ULL(0xa0000) - ULL(0x9d400), 2},
{ULL(0xe8000), ULL(0x100000) - ULL(0xe8000), 2},
{ULL(0x100000), ULL(0xcfff9300) - ULL(0x100000), 1},
{ULL(0xcfff9300), ULL(0xd0000000) - ULL(0xcfff9300), 2},
{ULL(0xfec00000), ULL(0x100000000) - ULL(0xfec00000), 2}
};
uint8_t e820Nr = sizeof(e820Map) / sizeof(e820Entry);
// Make sure the number of entries isn't bigger than what the kernel
// would be capable of providing.
assert(e820Nr <= 128);
uint8_t guestE820Nr = X86ISA::htog(e820Nr);
physPort->writeBlob(e820MapNrPointer,
(uint8_t *)&guestE820Nr, sizeof(guestE820Nr));
for (int i = 0; i < e820Nr; i++) {
e820Entry guestE820Entry;
guestE820Entry.addr = X86ISA::htog(e820Map[i].addr);
guestE820Entry.size = X86ISA::htog(e820Map[i].size);
guestE820Entry.type = X86ISA::htog(e820Map[i].type);
physPort->writeBlob(e820MapPointer + e820EntrySize * i,
(uint8_t *)&guestE820Entry.addr,
sizeof(guestE820Entry.addr));
physPort->writeBlob(
e820MapPointer + e820EntrySize * i +
sizeof(guestE820Entry.addr),
(uint8_t *)&guestE820Entry.size,
sizeof(guestE820Entry.size));
physPort->writeBlob(
e820MapPointer + e820EntrySize * i +
sizeof(guestE820Entry.addr) +
sizeof(guestE820Entry.size),
(uint8_t *)&guestE820Entry.type,
sizeof(guestE820Entry.type));
}
/*
* 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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