9e3c8de30b
This patch is adding a clearer design intent to all objects that would not be complete without a port proxy by making the proxies members rathen than dynamically allocated. In essence, if NULL would not be a valid value for the proxy, then we avoid using a pointer to make this clear. The same approach is used for the methods using these proxies, such as loadSections, that now use references rather than pointers to better reflect the fact that NULL would not be an acceptable value (in fact the code would break and that is how this patch started out). Overall the concept of "using a reference to express unconditional composition where a NULL pointer is never valid" could be done on a much broader scale throughout the code base, but for now it is only done in the locations affected by the proxies.
141 lines
4.6 KiB
C++
141 lines
4.6 KiB
C++
/*
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* Copyright (c) 2007-2008 The Hewlett-Packard Development Company
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* All rights reserved.
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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*/
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#include "arch/x86/linux/system.hh"
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#include "arch/x86/regs/int.hh"
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#include "arch/x86/isa_traits.hh"
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#include "arch/vtophys.hh"
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#include "base/trace.hh"
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#include "cpu/thread_context.hh"
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#include "mem/port_proxy.hh"
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#include "params/LinuxX86System.hh"
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#include "sim/byteswap.hh"
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using namespace LittleEndianGuest;
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using namespace X86ISA;
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LinuxX86System::LinuxX86System(Params *p)
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: X86System(p), commandLine(p->boot_osflags), e820Table(p->e820_table)
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{
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}
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LinuxX86System::~LinuxX86System()
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{
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}
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void
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LinuxX86System::initState()
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{
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X86System::initState();
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// The location of the real mode data structure.
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const Addr realModeData = 0x90200;
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/*
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* Deal with the command line stuff.
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*/
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// A buffer to store the command line.
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const Addr commandLineBuff = 0x90000;
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// A pointer to the commandLineBuff stored in the real mode data.
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const Addr commandLinePointer = realModeData + 0x228;
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if (commandLine.length() + 1 > realModeData - commandLineBuff)
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panic("Command line \"%s\" is longer than %d characters.\n",
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commandLine, realModeData - commandLineBuff - 1);
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physProxy.writeBlob(commandLineBuff, (uint8_t *)commandLine.c_str(),
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commandLine.length() + 1);
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// Generate a pointer of the right size and endianness to put into
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// commandLinePointer.
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uint32_t guestCommandLineBuff =
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X86ISA::htog((uint32_t)commandLineBuff);
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physProxy.writeBlob(commandLinePointer, (uint8_t *)&guestCommandLineBuff,
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sizeof(guestCommandLineBuff));
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/*
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* Screen Info.
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*/
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// We'll skip on this for now because it's only needed for framebuffers,
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// something we don't support at the moment.
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/*
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* EDID info
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*/
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// Skipping for now.
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/*
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* Saved video mode
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*/
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// Skipping for now.
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/*
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* Loader type.
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*/
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// Skipping for now.
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/*
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* E820 memory map
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*/
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// A pointer to the number of E820 entries there are.
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const Addr e820MapNrPointer = realModeData + 0x1e8;
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// A pointer to the buffer for E820 entries.
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const Addr e820MapPointer = realModeData + 0x2d0;
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e820Table->writeTo(physProxy, e820MapNrPointer, e820MapPointer);
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/*
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* Pass the location of the real mode data structure to the kernel
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* using register %esi. We'll use %rsi which should be equivalent.
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*/
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threadContexts[0]->setIntReg(INTREG_RSI, realModeData);
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}
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LinuxX86System *
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LinuxX86SystemParams::create()
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{
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return new LinuxX86System(this);
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}
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