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
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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
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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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