system.cc revision 8852
1/* 2 * Copyright (c) 2007-2008 The Hewlett-Packard Development Company 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions are 16 * met: redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer; 18 * redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution; 21 * neither the name of the copyright holders nor the names of its 22 * contributors may be used to endorse or promote products derived from 23 * this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: Gabe Black 38 */ 39 40#include "arch/x86/linux/system.hh" 41#include "arch/x86/regs/int.hh" 42#include "arch/x86/isa_traits.hh" 43#include "arch/vtophys.hh" 44#include "base/trace.hh" 45#include "cpu/thread_context.hh" 46#include "mem/port_proxy.hh" 47#include "params/LinuxX86System.hh" 48#include "sim/byteswap.hh" 49 50using namespace LittleEndianGuest; 51using namespace X86ISA; 52 53LinuxX86System::LinuxX86System(Params *p) 54 : X86System(p), commandLine(p->boot_osflags), e820Table(p->e820_table) 55{ 56} 57 58LinuxX86System::~LinuxX86System() 59{ 60} 61 62void 63LinuxX86System::initState() 64{ 65 X86System::initState(); 66 67 // The location of the real mode data structure. 68 const Addr realModeData = 0x90200; 69 70 /* 71 * Deal with the command line stuff. 72 */ 73 74 // A buffer to store the command line. 75 const Addr commandLineBuff = 0x90000; 76 // A pointer to the commandLineBuff stored in the real mode data. 77 const Addr commandLinePointer = realModeData + 0x228; 78 79 if (commandLine.length() + 1 > realModeData - commandLineBuff) 80 panic("Command line \"%s\" is longer than %d characters.\n", 81 commandLine, realModeData - commandLineBuff - 1); 82 physProxy.writeBlob(commandLineBuff, (uint8_t *)commandLine.c_str(), 83 commandLine.length() + 1); 84 85 // Generate a pointer of the right size and endianness to put into 86 // commandLinePointer. 87 uint32_t guestCommandLineBuff = 88 X86ISA::htog((uint32_t)commandLineBuff); 89 physProxy.writeBlob(commandLinePointer, (uint8_t *)&guestCommandLineBuff, 90 sizeof(guestCommandLineBuff)); 91 92 /* 93 * Screen Info. 94 */ 95 96 // We'll skip on this for now because it's only needed for framebuffers, 97 // something we don't support at the moment. 98 99 /* 100 * EDID info 101 */ 102 103 // Skipping for now. 104 105 /* 106 * Saved video mode 107 */ 108 109 // Skipping for now. 110 111 /* 112 * Loader type. 113 */ 114 115 // Skipping for now. 116 117 /* 118 * E820 memory map 119 */ 120 121 // A pointer to the number of E820 entries there are. 122 const Addr e820MapNrPointer = realModeData + 0x1e8; 123 124 // A pointer to the buffer for E820 entries. 125 const Addr e820MapPointer = realModeData + 0x2d0; 126 127 e820Table->writeTo(physProxy, e820MapNrPointer, e820MapPointer); 128 129 /* 130 * Pass the location of the real mode data structure to the kernel 131 * using register %esi. We'll use %rsi which should be equivalent. 132 */ 133 threadContexts[0]->setIntReg(INTREG_RSI, realModeData); 134} 135 136LinuxX86System * 137LinuxX86SystemParams::create() 138{ 139 return new LinuxX86System(this); 140} 141