1/*
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2 * Copyright (c) 2007 The Hewlett-Packard Development Company
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2 * Copyright (c) 2007-2008 The Hewlett-Packard Development Company |
3 * All rights reserved. 4 * 5 * Redistribution and use of this software in source and binary forms, 6 * with or without modification, are permitted provided that the 7 * following conditions are met: 8 * 9 * The software must be used only for Non-Commercial Use which means any 10 * use which is NOT directed to receiving any direct monetary 11 * compensation for, or commercial advantage from such use. Illustrative 12 * examples of non-commercial use are academic research, personal study, 13 * teaching, education and corporate research & development. 14 * Illustrative examples of commercial use are distributing products for 15 * commercial advantage and providing services using the software for 16 * commercial advantage. 17 * 18 * If you wish to use this software or functionality therein that may be 19 * covered by patents for commercial use, please contact: 20 * Director of Intellectual Property Licensing 21 * Office of Strategy and Technology 22 * Hewlett-Packard Company 23 * 1501 Page Mill Road 24 * Palo Alto, California 94304 25 * 26 * Redistributions of source code must retain the above copyright notice, 27 * this list of conditions and the following disclaimer. Redistributions 28 * in binary form must reproduce the above copyright notice, this list of 29 * conditions and the following disclaimer in the documentation and/or 30 * other materials provided with the distribution. Neither the name of 31 * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its 32 * contributors may be used to endorse or promote products derived from 33 * this software without specific prior written permission. No right of 34 * sublicense is granted herewith. Derivatives of the software and 35 * output created using the software may be prepared, but only for 36 * Non-Commercial Uses. Derivatives of the software may be shared with 37 * others provided: (i) the others agree to abide by the list of 38 * conditions herein which includes the Non-Commercial Use restrictions; 39 * and (ii) such Derivatives of the software include the above copyright 40 * notice to acknowledge the contribution from this software where 41 * applicable, this list of conditions and the disclaimer below. 42 * 43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 54 * 55 * Authors: Gabe Black 56 */ 57 58#include "arch/x86/intregs.hh" 59#include "arch/x86/linux/system.hh" 60#include "arch/vtophys.hh" 61#include "base/trace.hh" 62#include "cpu/thread_context.hh" 63#include "mem/physical.hh" 64#include "params/LinuxX86System.hh" 65 66 67using namespace LittleEndianGuest; 68using namespace X86ISA; 69 70LinuxX86System::LinuxX86System(Params *p)
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71 : X86System(p), commandLine(p->boot_osflags)
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71 : X86System(p), commandLine(p->boot_osflags), e820Table(p->e820_table) |
72{ 73} 74 75LinuxX86System::~LinuxX86System() 76{ 77} 78 79void 80LinuxX86System::startup() 81{ 82 X86System::startup(); 83 84 // The location of the real mode data structure. 85 const Addr realModeData = 0x90200; 86 87 // A port to write to memory. 88 FunctionalPort * physPort = threadContexts[0]->getPhysPort(); 89 90 /* 91 * Deal with the command line stuff. 92 */ 93 94 // A buffer to store the command line. 95 const Addr commandLineBuff = 0x90000; 96 // A pointer to the commandLineBuff stored in the real mode data. 97 const Addr commandLinePointer = realModeData + 0x228; 98 99 if (commandLine.length() + 1 > realModeData - commandLineBuff) 100 panic("Command line \"%s\" is longer than %d characters.\n", 101 commandLine, realModeData - commandLineBuff - 1); 102 physPort->writeBlob(commandLineBuff, 103 (uint8_t *)commandLine.c_str(), commandLine.length() + 1); 104 105 // Generate a pointer of the right size and endianness to put into 106 // commandLinePointer. 107 uint32_t guestCommandLineBuff = 108 X86ISA::htog((uint32_t)commandLineBuff); 109 physPort->writeBlob(commandLinePointer, 110 (uint8_t *)&guestCommandLineBuff, sizeof(guestCommandLineBuff)); 111 112 /* 113 * Screen Info. 114 */ 115 116 // We'll skip on this for now because it's only needed for framebuffers, 117 // something we don't support at the moment. 118 119 /* 120 * EDID info 121 */ 122 123 // Skipping for now. 124 125 /* 126 * Saved video mode 127 */ 128 129 // Skipping for now. 130 131 /* 132 * Loader type. 133 */ 134 135 // Skipping for now. 136 137 /* 138 * E820 memory map 139 */ 140 141 // A pointer to the number of E820 entries there are. 142 const Addr e820MapNrPointer = realModeData + 0x1e8; 143 144 // A pointer to the buffer for E820 entries. 145 const Addr e820MapPointer = realModeData + 0x2d0; 146
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147 struct e820Entry
148 {
149 Addr addr;
150 Addr size;
151 uint32_t type;
152 };
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147 e820Table->writeTo(physPort, e820MapNrPointer, e820MapPointer); |
148
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154 // The size is computed this way to ensure no padding sneaks in.
155 int e820EntrySize =
156 sizeof(e820Entry().addr) +
157 sizeof(e820Entry().size) +
158 sizeof(e820Entry().type);
159
160 // I'm not sure what these should actually be. On a real machine they
161 // would be generated by the BIOS, and they need to reflect the regions
162 // which are actually available/reserved. These values are copied from
163 // my development machine.
164 e820Entry e820Map[] = {
165 {ULL(0x0), ULL(0x9d400), 1},
166 {ULL(0x9d400), ULL(0xa0000) - ULL(0x9d400), 2},
167 {ULL(0xe8000), ULL(0x100000) - ULL(0xe8000), 2},
168 {ULL(0x100000), ULL(0xcfff9300) - ULL(0x100000), 1},
169 {ULL(0xcfff9300), ULL(0xd0000000) - ULL(0xcfff9300), 2},
170 {ULL(0xfec00000), ULL(0x100000000) - ULL(0xfec00000), 2}
171 };
172
173 uint8_t e820Nr = sizeof(e820Map) / sizeof(e820Entry);
174
175 // Make sure the number of entries isn't bigger than what the kernel
176 // would be capable of providing.
177 assert(e820Nr <= 128);
178
179 uint8_t guestE820Nr = X86ISA::htog(e820Nr);
180 physPort->writeBlob(e820MapNrPointer,
181 (uint8_t *)&guestE820Nr, sizeof(guestE820Nr));
182
183 for (int i = 0; i < e820Nr; i++) {
184 e820Entry guestE820Entry;
185 guestE820Entry.addr = X86ISA::htog(e820Map[i].addr);
186 guestE820Entry.size = X86ISA::htog(e820Map[i].size);
187 guestE820Entry.type = X86ISA::htog(e820Map[i].type);
188 physPort->writeBlob(e820MapPointer + e820EntrySize * i,
189 (uint8_t *)&guestE820Entry.addr,
190 sizeof(guestE820Entry.addr));
191 physPort->writeBlob(
192 e820MapPointer + e820EntrySize * i +
193 sizeof(guestE820Entry.addr),
194 (uint8_t *)&guestE820Entry.size,
195 sizeof(guestE820Entry.size));
196 physPort->writeBlob(
197 e820MapPointer + e820EntrySize * i +
198 sizeof(guestE820Entry.addr) +
199 sizeof(guestE820Entry.size),
200 (uint8_t *)&guestE820Entry.type,
201 sizeof(guestE820Entry.type));
202 }
203
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149 /* 150 * Pass the location of the real mode data structure to the kernel 151 * using register %esi. We'll use %rsi which should be equivalent. 152 */ 153 threadContexts[0]->setIntReg(INTREG_RSI, realModeData); 154} 155 156LinuxX86System * 157LinuxX86SystemParams::create() 158{ 159 return new LinuxX86System(this); 160}
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