system.cc (8229:78bf55f23338) system.cc (8706:b1838faf3bcc)
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

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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"
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

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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/physical.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)

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62void
63LinuxX86System::initState()
64{
65 X86System::initState();
66
67 // The location of the real mode data structure.
68 const Addr realModeData = 0x90200;
69
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)

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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 to write to memory.
71 FunctionalPort * physPort = threadContexts[0]->getPhysPort();
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);
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 physPort->writeBlob(commandLineBuff,
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);
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 physPort->writeBlob(commandLinePointer,
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.

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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
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.

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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(physPort, e820MapNrPointer, e820MapPointer);
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}
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}