system.cc revision 7629
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/vtophys.hh" 43#include "base/trace.hh" 44#include "cpu/thread_context.hh" 45#include "mem/physical.hh" 46#include "params/LinuxX86System.hh" 47 48 49using namespace LittleEndianGuest; 50using namespace X86ISA; 51 52LinuxX86System::LinuxX86System(Params *p) 53 : X86System(p), commandLine(p->boot_osflags), e820Table(p->e820_table) 54{ 55} 56 57LinuxX86System::~LinuxX86System() 58{ 59} 60 61void 62LinuxX86System::initState() 63{ 64 X86System::initState(); 65 66 // The location of the real mode data structure. 67 const Addr realModeData = 0x90200; 68 69 // A port to write to memory. 70 FunctionalPort * physPort = threadContexts[0]->getPhysPort(); 71 72 /* 73 * Deal with the command line stuff. 74 */ 75 76 // A buffer to store the command line. 77 const Addr commandLineBuff = 0x90000; 78 // A pointer to the commandLineBuff stored in the real mode data. 79 const Addr commandLinePointer = realModeData + 0x228; 80 81 if (commandLine.length() + 1 > realModeData - commandLineBuff) 82 panic("Command line \"%s\" is longer than %d characters.\n", 83 commandLine, realModeData - commandLineBuff - 1); 84 physPort->writeBlob(commandLineBuff, 85 (uint8_t *)commandLine.c_str(), commandLine.length() + 1); 86 87 // Generate a pointer of the right size and endianness to put into 88 // commandLinePointer. 89 uint32_t guestCommandLineBuff = 90 X86ISA::htog((uint32_t)commandLineBuff); 91 physPort->writeBlob(commandLinePointer, 92 (uint8_t *)&guestCommandLineBuff, sizeof(guestCommandLineBuff)); 93 94 /* 95 * Screen Info. 96 */ 97 98 // We'll skip on this for now because it's only needed for framebuffers, 99 // something we don't support at the moment. 100 101 /* 102 * EDID info 103 */ 104 105 // Skipping for now. 106 107 /* 108 * Saved video mode 109 */ 110 111 // Skipping for now. 112 113 /* 114 * Loader type. 115 */ 116 117 // Skipping for now. 118 119 /* 120 * E820 memory map 121 */ 122 123 // A pointer to the number of E820 entries there are. 124 const Addr e820MapNrPointer = realModeData + 0x1e8; 125 126 // A pointer to the buffer for E820 entries. 127 const Addr e820MapPointer = realModeData + 0x2d0; 128 129 e820Table->writeTo(physPort, e820MapNrPointer, e820MapPointer); 130 131 /* 132 * Pass the location of the real mode data structure to the kernel 133 * using register %esi. We'll use %rsi which should be equivalent. 134 */ 135 threadContexts[0]->setIntReg(INTREG_RSI, realModeData); 136} 137 138LinuxX86System * 139LinuxX86SystemParams::create() 140{ 141 return new LinuxX86System(this); 142} 143