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;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Ali Saidi
29 * Lisa Hsu
30 * Nathan Binkert
31 */
32
33/**
34 * @file
35 * This code loads the linux kernel, console, pal and patches certain
36 * functions. The symbol tables are loaded so that traces can show
37 * the executing function and we can skip functions. Various delay
38 * loops are skipped and their final values manually computed to speed
39 * up boot time.
40 */
41
42#include "arch/mips/linux/system.hh"
43#include "arch/mips/linux/threadinfo.hh"
44#include "arch/mips/idle_event.hh"
45#include "arch/mips/system.hh"
46#include "arch/vtophys.hh"
47#include "base/loader/symtab.hh"
48#include "cpu/base.hh"
49#include "cpu/thread_context.hh"
50#include "debug/Thread.hh"
51#include "dev/platform.hh"
52#include "kern/linux/events.hh"
53#include "kern/linux/printk.hh"
54#include "mem/physical.hh"
55#include "mem/port.hh"
56#include "sim/arguments.hh"
57#include "sim/byteswap.hh"
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;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Ali Saidi
29 * Lisa Hsu
30 * Nathan Binkert
31 */
32
33/**
34 * @file
35 * This code loads the linux kernel, console, pal and patches certain
36 * functions. The symbol tables are loaded so that traces can show
37 * the executing function and we can skip functions. Various delay
38 * loops are skipped and their final values manually computed to speed
39 * up boot time.
40 */
41
42#include "arch/mips/linux/system.hh"
43#include "arch/mips/linux/threadinfo.hh"
44#include "arch/mips/idle_event.hh"
45#include "arch/mips/system.hh"
46#include "arch/vtophys.hh"
47#include "base/loader/symtab.hh"
48#include "cpu/base.hh"
49#include "cpu/thread_context.hh"
50#include "debug/Thread.hh"
51#include "dev/platform.hh"
52#include "kern/linux/events.hh"
53#include "kern/linux/printk.hh"
54#include "mem/physical.hh"
55#include "mem/port.hh"
56#include "sim/arguments.hh"
57#include "sim/byteswap.hh"
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}
159
160
161void
162LinuxMipsSystem::SkipDelayLoopEvent::process(ThreadContext *tc)
163{
164 SkipFuncEvent::process(tc);
165 // calculate and set loops_per_jiffy
166 ((LinuxMipsSystem *)tc->getSystemPtr())->setDelayLoop(tc);
167}
168
169void
170LinuxMipsSystem::PrintThreadInfo::process(ThreadContext *tc)
171{
172 Linux::ThreadInfo ti(tc);
173
174 DPRINTF(Thread, "Currently Executing Thread %s, pid %d, started at: %d\n",
175 ti.curTaskName(), ti.curTaskPID(), ti.curTaskStart());
176}
177
178LinuxMipsSystem *
179LinuxMipsSystemParams::create()
180{
181 return new LinuxMipsSystem(this);
182}
70}
71
72
73void
74LinuxMipsSystem::setDelayLoop(ThreadContext *tc)
75{
76 panic("setDelayLoop not implemented.\n");
77}
78
79
80void
81LinuxMipsSystem::SkipDelayLoopEvent::process(ThreadContext *tc)
82{
83 SkipFuncEvent::process(tc);
84 // calculate and set loops_per_jiffy
85 ((LinuxMipsSystem *)tc->getSystemPtr())->setDelayLoop(tc);
86}
87
88void
89LinuxMipsSystem::PrintThreadInfo::process(ThreadContext *tc)
90{
91 Linux::ThreadInfo ti(tc);
92
93 DPRINTF(Thread, "Currently Executing Thread %s, pid %d, started at: %d\n",
94 ti.curTaskName(), ti.curTaskPID(), ti.curTaskStart());
95}
96
97LinuxMipsSystem *
98LinuxMipsSystemParams::create()
99{
100 return new LinuxMipsSystem(this);
101}