system.cc revision 8706
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 // A port proxy to write to memory. 71 PortProxy* physProxy = threadContexts[0]->getPhysProxy(); 72 73 /* 74 * Deal with the command line stuff. 75 */ 76 77 // A buffer to store the command line. 78 const Addr commandLineBuff = 0x90000; 79 // A pointer to the commandLineBuff stored in the real mode data. 80 const Addr commandLinePointer = realModeData + 0x228; 81 82 if (commandLine.length() + 1 > realModeData - commandLineBuff) 83 panic("Command line \"%s\" is longer than %d characters.\n", 84 commandLine, realModeData - commandLineBuff - 1); 85 physProxy->writeBlob(commandLineBuff, 86 (uint8_t *)commandLine.c_str(), commandLine.length() + 1); 87 88 // Generate a pointer of the right size and endianness to put into 89 // commandLinePointer. 90 uint32_t guestCommandLineBuff = 91 X86ISA::htog((uint32_t)commandLineBuff); 92 physProxy->writeBlob(commandLinePointer, 93 (uint8_t *)&guestCommandLineBuff, sizeof(guestCommandLineBuff)); 94 95 /* 96 * Screen Info. 97 */ 98 99 // We'll skip on this for now because it's only needed for framebuffers, 100 // something we don't support at the moment. 101 102 /* 103 * EDID info 104 */ 105 106 // Skipping for now. 107 108 /* 109 * Saved video mode 110 */ 111 112 // Skipping for now. 113 114 /* 115 * Loader type. 116 */ 117 118 // Skipping for now. 119 120 /* 121 * E820 memory map 122 */ 123 124 // A pointer to the number of E820 entries there are. 125 const Addr e820MapNrPointer = realModeData + 0x1e8; 126 127 // A pointer to the buffer for E820 entries. 128 const Addr e820MapPointer = realModeData + 0x2d0; 129 130 e820Table->writeTo(getSystemPort(), e820MapNrPointer, e820MapPointer); 131 132 /* 133 * Pass the location of the real mode data structure to the kernel 134 * using register %esi. We'll use %rsi which should be equivalent. 135 */ 136 threadContexts[0]->setIntReg(INTREG_RSI, realModeData); 137} 138 139LinuxX86System * 140LinuxX86SystemParams::create() 141{ 142 return new LinuxX86System(this); 143} 144