system.cc (8775:1e3ca5d77b53) system.cc (8799:dac1e33e07b0)
1/*
2 * Copyright (c) 2004-2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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58
59using namespace std;
60using namespace MipsISA;
61using namespace Linux;
62
63LinuxMipsSystem::LinuxMipsSystem(Params *p)
64 : MipsSystem(p)
65{
1/*
2 * Copyright (c) 2004-2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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58
59using namespace std;
60using namespace MipsISA;
61using namespace Linux;
62
63LinuxMipsSystem::LinuxMipsSystem(Params *p)
64 : MipsSystem(p)
65{
66 Addr addr = 0;
67
68 /**
69 * The symbol swapper_pg_dir marks the beginning of the kernel and
70 * the location of bootloader passed arguments
71 */
72 if (!kernelSymtab->findAddress("swapper_pg_dir", KernelStart)) {
73 panic("Could not determine start location of kernel");
74 }
75
76 /**
77 * Since we aren't using a bootloader, we have to copy the
78 * kernel arguments directly into the kernel's memory.
79 */
80 virtPort->writeBlob(CommandLine(), (uint8_t*)params()->boot_osflags.c_str(),
81 params()->boot_osflags.length()+1);
82
83 /**
84 * find the address of the est_cycle_freq variable and insert it
85 * so we don't through the lengthly process of trying to
86 * calculated it by using the PIT, RTC, etc.
87 */
88 if (kernelSymtab->findAddress("est_cycle_freq", addr))
89 virtPort->write(addr, (uint64_t)(SimClock::Frequency /
90 p->boot_cpu_frequency));
91
92 /**
93 * EV5 only supports 127 ASNs so we are going to tell the kernel that the
94 * paritiuclar EV6 we have only supports 127 asns.
95 * @todo At some point we should change ev5.hh and the palcode to support
96 * 255 ASNs.
97 */
98 if (kernelSymtab->findAddress("dp264_mv", addr))
99 virtPort->write(addr + 0x18, LittleEndianGuest::htog((uint32_t)127));
100 else
101 panic("could not find dp264_mv\n");
102
103#ifndef NDEBUG
104 kernelPanicEvent = addKernelFuncEvent<BreakPCEvent>("panic");
105 if (!kernelPanicEvent)
106 panic("could not find kernel symbol \'panic\'");
107
108#endif
109
110 /**
111 * Any time ide_delay_50ms, calibarte_delay or
112 * determine_cpu_caches is called just skip the
113 * function. Currently determine_cpu_caches only is used put
114 * information in proc, however if that changes in the future we
115 * will have to fill in the cache size variables appropriately.
116 */
117
118 skipIdeDelay50msEvent =
119 addKernelFuncEvent<SkipFuncEvent>("ide_delay_50ms");
120 skipDelayLoopEvent =
121 addKernelFuncEvent<SkipDelayLoopEvent>("calibrate_delay");
122 skipCacheProbeEvent =
123 addKernelFuncEvent<SkipFuncEvent>("determine_cpu_caches");
124 debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk");
125 idleStartEvent = addKernelFuncEvent<IdleStartEvent>("cpu_idle");
126
127 // Disable for now as it runs into panic() calls in VPTr methods
128 // (see sim/vptr.hh). Once those bugs are fixed, we can
129 // re-enable, but we should find a better way to turn it on than
130 // using DTRACE(Thread), since looking at a trace flag at tick 0
131 // leads to non-intuitive behavior with --trace-start.
132 if (false && kernelSymtab->findAddress("mips_switch_to", addr)) {
133 printThreadEvent = new PrintThreadInfo(&pcEventQueue, "threadinfo",
134 addr + sizeof(MachInst) * 6);
135 } else {
136 printThreadEvent = NULL;
137 }
138}
139
140LinuxMipsSystem::~LinuxMipsSystem()
141{
66}
67
68LinuxMipsSystem::~LinuxMipsSystem()
69{
142#ifndef NDEBUG
143 delete kernelPanicEvent;
144#endif
145 delete skipIdeDelay50msEvent;
146 delete skipDelayLoopEvent;
147 delete skipCacheProbeEvent;
148 delete debugPrintkEvent;
149 delete idleStartEvent;
150 delete printThreadEvent;
151}
152
153
154void
155LinuxMipsSystem::setDelayLoop(ThreadContext *tc)
156{
157 panic("setDelayLoop not implemented.\n");
158}

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71
72
73void
74LinuxMipsSystem::setDelayLoop(ThreadContext *tc)
75{
76 panic("setDelayLoop not implemented.\n");
77}

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