system.cc (5299:e61b9f2a9732) system.cc (5303:ee44ea10f32f)
1/*
2 * Copyright (c) 2007 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 *

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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
1/*
2 * Copyright (c) 2007 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 *

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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"
58#include "arch/x86/linux/system.hh"
59#include "arch/vtophys.hh"
60#include "base/trace.hh"
59#include "arch/x86/linux/system.hh"
60#include "arch/vtophys.hh"
61#include "base/trace.hh"
62#include "cpu/thread_context.hh"
61#include "mem/physical.hh"
62#include "params/LinuxX86System.hh"
63
64
65using namespace LittleEndianGuest;
66using namespace X86ISA;
67
68LinuxX86System::LinuxX86System(Params *p)

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73LinuxX86System::~LinuxX86System()
74{
75}
76
77void
78LinuxX86System::startup()
79{
80 X86System::startup();
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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75LinuxX86System::~LinuxX86System()
76{
77}
78
79void
80LinuxX86System::startup()
81{
82 X86System::startup();
81 //Build the real mode data structure.
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
147 struct e820Entry
148 {
149 Addr addr;
150 Addr size;
151 uint32_t type;
152 };
153
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
204 /*
205 * Pass the location of the real mode data structure to the kernel
206 * using register %esi. We'll use %rsi which should be equivalent.
207 */
208 threadContexts[0]->setIntReg(INTREG_RSI, realModeData);
82}
83
84LinuxX86System *
85LinuxX86SystemParams::create()
86{
87 return new LinuxX86System(this);
88}
209}
210
211LinuxX86System *
212LinuxX86SystemParams::create()
213{
214 return new LinuxX86System(this);
215}