1/*
2 * Copyright (c) 2004-2005 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 * Steve Reinhardt
32 */
33
34/**
35 * @file
36 * This code loads the linux kernel, console, pal and patches certain
37 * functions. The symbol tables are loaded so that traces can show
38 * the executing function and we can skip functions. Various delay
39 * loops are skipped and their final values manually computed to speed
40 * up boot time.
41 */
42
43#include "arch/alpha/linux/system.hh"
| 1/*
2 * Copyright (c) 2004-2005 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 * Steve Reinhardt
32 */
33
34/**
35 * @file
36 * This code loads the linux kernel, console, pal and patches certain
37 * functions. The symbol tables are loaded so that traces can show
38 * the executing function and we can skip functions. Various delay
39 * loops are skipped and their final values manually computed to speed
40 * up boot time.
41 */
42
43#include "arch/alpha/linux/system.hh"
|
44#include "arch/alpha/idle_event.hh"
45#include "arch/alpha/system.hh"
46#include "arch/generic/linux/threadinfo.hh"
47#include "arch/vtophys.hh"
48#include "base/loader/symtab.hh"
49#include "cpu/base.hh"
50#include "cpu/thread_context.hh"
51#include "debug/Thread.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 AlphaISA;
61using namespace Linux;
62
63LinuxAlphaSystem::LinuxAlphaSystem(Params *p)
64 : AlphaSystem(p)
65{
66}
67
68void
69LinuxAlphaSystem::initState()
70{
71 // Moved from the constructor to here since it relies on the
72 // address map being resolved in the interconnect
73
74 // Call the initialisation of the super class
75 AlphaSystem::initState();
76
77 Addr addr = 0;
78
79 /**
80 * The symbol swapper_pg_dir marks the beginning of the kernel and
81 * the location of bootloader passed arguments
82 */
83 if (!kernelSymtab->findAddress("swapper_pg_dir", KernelStart)) {
84 panic("Could not determine start location of kernel");
85 }
86
87 /**
88 * Since we aren't using a bootloader, we have to copy the
89 * kernel arguments directly into the kernel's memory.
90 */
91 virtProxy.writeBlob(CommandLine(),
92 (uint8_t*)params()->boot_osflags.c_str(),
93 params()->boot_osflags.length()+1);
94
95 /**
96 * find the address of the est_cycle_freq variable and insert it
97 * so we don't through the lengthly process of trying to
98 * calculated it by using the PIT, RTC, etc.
99 */
100 if (kernelSymtab->findAddress("est_cycle_freq", addr))
101 virtProxy.write(addr, (uint64_t)(SimClock::Frequency /
102 params()->boot_cpu_frequency));
103
104
105 /**
106 * EV5 only supports 127 ASNs so we are going to tell the kernel that the
107 * paritiuclar EV6 we have only supports 127 asns.
108 * @todo At some point we should change ev5.hh and the palcode to support
109 * 255 ASNs.
110 */
111 if (kernelSymtab->findAddress("dp264_mv", addr))
112 virtProxy.write(addr + 0x18, LittleEndianGuest::htog((uint32_t)127));
113 else
114 panic("could not find dp264_mv\n");
115
116}
117
118void
119LinuxAlphaSystem::setupFuncEvents()
120{
121 AlphaSystem::setupFuncEvents();
122#ifndef NDEBUG
123 kernelPanicEvent = addKernelFuncEventOrPanic<BreakPCEvent>("panic");
124
125#if 0
126 kernelDieEvent = addKernelFuncEventOrPanic<BreakPCEvent>("die_if_kernel");
127#endif
128
129#endif
130
131 /**
132 * Any time ide_delay_50ms, calibarte_delay or
133 * determine_cpu_caches is called just skip the
134 * function. Currently determine_cpu_caches only is used put
135 * information in proc, however if that changes in the future we
136 * will have to fill in the cache size variables appropriately.
137 */
138
139 skipIdeDelay50msEvent =
140 addKernelFuncEvent<SkipFuncEvent>("ide_delay_50ms");
141 skipDelayLoopEvent =
142 addKernelFuncEvent<SkipDelayLoopEvent>("calibrate_delay");
143 skipCacheProbeEvent =
144 addKernelFuncEvent<SkipFuncEvent>("determine_cpu_caches");
145 debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk");
146 idleStartEvent = addKernelFuncEvent<IdleStartEvent>("cpu_idle");
147
148 // Disable for now as it runs into panic() calls in VPTr methods
149 // (see sim/vptr.hh). Once those bugs are fixed, we can
150 // re-enable, but we should find a better way to turn it on than
151 // using DTRACE(Thread), since looking at a trace flag at tick 0
152 // leads to non-intuitive behavior with --trace-start.
153 Addr addr = 0;
154 if (false && kernelSymtab->findAddress("alpha_switch_to", addr)) {
155 printThreadEvent = new PrintThreadInfo(&pcEventQueue, "threadinfo",
156 addr + sizeof(MachInst) * 6);
157 } else {
158 printThreadEvent = NULL;
159 }
160}
161
162LinuxAlphaSystem::~LinuxAlphaSystem()
163{
164#ifndef NDEBUG
165 delete kernelPanicEvent;
166#endif
167 delete skipIdeDelay50msEvent;
168 delete skipDelayLoopEvent;
169 delete skipCacheProbeEvent;
170 delete debugPrintkEvent;
171 delete idleStartEvent;
172 delete printThreadEvent;
173}
174
175void
176LinuxAlphaSystem::setDelayLoop(ThreadContext *tc)
177{
178 Addr addr = 0;
179 if (kernelSymtab->findAddress("loops_per_jiffy", addr)) {
180 Tick cpuFreq = tc->getCpuPtr()->frequency();
181 assert(intrFreq);
182 FSTranslatingPortProxy &vp = tc->getVirtProxy();
183 vp.writeHtoG(addr, (uint32_t)((cpuFreq / intrFreq) * 0.9988));
184 }
185}
186
187void
188LinuxAlphaSystem::SkipDelayLoopEvent::process(ThreadContext *tc)
189{
190 SkipFuncEvent::process(tc);
191 // calculate and set loops_per_jiffy
192 ((LinuxAlphaSystem *)tc->getSystemPtr())->setDelayLoop(tc);
193}
194
195void
196LinuxAlphaSystem::PrintThreadInfo::process(ThreadContext *tc)
197{
198 Linux::ThreadInfo ti(tc);
199
200 DPRINTF(Thread, "Currently Executing Thread %s, pid %d, started at: %d\n",
201 ti.curTaskName(), ti.curTaskPID(), ti.curTaskStart());
202}
203
204LinuxAlphaSystem *
205LinuxAlphaSystemParams::create()
206{
207 return new LinuxAlphaSystem(this);
208}
| 45#include "arch/alpha/idle_event.hh"
46#include "arch/alpha/system.hh"
47#include "arch/generic/linux/threadinfo.hh"
48#include "arch/vtophys.hh"
49#include "base/loader/symtab.hh"
50#include "cpu/base.hh"
51#include "cpu/thread_context.hh"
52#include "debug/Thread.hh"
53#include "kern/linux/events.hh"
54#include "kern/linux/printk.hh"
55#include "mem/physical.hh"
56#include "mem/port.hh"
57#include "sim/arguments.hh"
58#include "sim/byteswap.hh"
59
60using namespace std;
61using namespace AlphaISA;
62using namespace Linux;
63
64LinuxAlphaSystem::LinuxAlphaSystem(Params *p)
65 : AlphaSystem(p)
66{
67}
68
69void
70LinuxAlphaSystem::initState()
71{
72 // Moved from the constructor to here since it relies on the
73 // address map being resolved in the interconnect
74
75 // Call the initialisation of the super class
76 AlphaSystem::initState();
77
78 Addr addr = 0;
79
80 /**
81 * The symbol swapper_pg_dir marks the beginning of the kernel and
82 * the location of bootloader passed arguments
83 */
84 if (!kernelSymtab->findAddress("swapper_pg_dir", KernelStart)) {
85 panic("Could not determine start location of kernel");
86 }
87
88 /**
89 * Since we aren't using a bootloader, we have to copy the
90 * kernel arguments directly into the kernel's memory.
91 */
92 virtProxy.writeBlob(CommandLine(),
93 (uint8_t*)params()->boot_osflags.c_str(),
94 params()->boot_osflags.length()+1);
95
96 /**
97 * find the address of the est_cycle_freq variable and insert it
98 * so we don't through the lengthly process of trying to
99 * calculated it by using the PIT, RTC, etc.
100 */
101 if (kernelSymtab->findAddress("est_cycle_freq", addr))
102 virtProxy.write(addr, (uint64_t)(SimClock::Frequency /
103 params()->boot_cpu_frequency));
104
105
106 /**
107 * EV5 only supports 127 ASNs so we are going to tell the kernel that the
108 * paritiuclar EV6 we have only supports 127 asns.
109 * @todo At some point we should change ev5.hh and the palcode to support
110 * 255 ASNs.
111 */
112 if (kernelSymtab->findAddress("dp264_mv", addr))
113 virtProxy.write(addr + 0x18, LittleEndianGuest::htog((uint32_t)127));
114 else
115 panic("could not find dp264_mv\n");
116
117}
118
119void
120LinuxAlphaSystem::setupFuncEvents()
121{
122 AlphaSystem::setupFuncEvents();
123#ifndef NDEBUG
124 kernelPanicEvent = addKernelFuncEventOrPanic<BreakPCEvent>("panic");
125
126#if 0
127 kernelDieEvent = addKernelFuncEventOrPanic<BreakPCEvent>("die_if_kernel");
128#endif
129
130#endif
131
132 /**
133 * Any time ide_delay_50ms, calibarte_delay or
134 * determine_cpu_caches is called just skip the
135 * function. Currently determine_cpu_caches only is used put
136 * information in proc, however if that changes in the future we
137 * will have to fill in the cache size variables appropriately.
138 */
139
140 skipIdeDelay50msEvent =
141 addKernelFuncEvent<SkipFuncEvent>("ide_delay_50ms");
142 skipDelayLoopEvent =
143 addKernelFuncEvent<SkipDelayLoopEvent>("calibrate_delay");
144 skipCacheProbeEvent =
145 addKernelFuncEvent<SkipFuncEvent>("determine_cpu_caches");
146 debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk");
147 idleStartEvent = addKernelFuncEvent<IdleStartEvent>("cpu_idle");
148
149 // Disable for now as it runs into panic() calls in VPTr methods
150 // (see sim/vptr.hh). Once those bugs are fixed, we can
151 // re-enable, but we should find a better way to turn it on than
152 // using DTRACE(Thread), since looking at a trace flag at tick 0
153 // leads to non-intuitive behavior with --trace-start.
154 Addr addr = 0;
155 if (false && kernelSymtab->findAddress("alpha_switch_to", addr)) {
156 printThreadEvent = new PrintThreadInfo(&pcEventQueue, "threadinfo",
157 addr + sizeof(MachInst) * 6);
158 } else {
159 printThreadEvent = NULL;
160 }
161}
162
163LinuxAlphaSystem::~LinuxAlphaSystem()
164{
165#ifndef NDEBUG
166 delete kernelPanicEvent;
167#endif
168 delete skipIdeDelay50msEvent;
169 delete skipDelayLoopEvent;
170 delete skipCacheProbeEvent;
171 delete debugPrintkEvent;
172 delete idleStartEvent;
173 delete printThreadEvent;
174}
175
176void
177LinuxAlphaSystem::setDelayLoop(ThreadContext *tc)
178{
179 Addr addr = 0;
180 if (kernelSymtab->findAddress("loops_per_jiffy", addr)) {
181 Tick cpuFreq = tc->getCpuPtr()->frequency();
182 assert(intrFreq);
183 FSTranslatingPortProxy &vp = tc->getVirtProxy();
184 vp.writeHtoG(addr, (uint32_t)((cpuFreq / intrFreq) * 0.9988));
185 }
186}
187
188void
189LinuxAlphaSystem::SkipDelayLoopEvent::process(ThreadContext *tc)
190{
191 SkipFuncEvent::process(tc);
192 // calculate and set loops_per_jiffy
193 ((LinuxAlphaSystem *)tc->getSystemPtr())->setDelayLoop(tc);
194}
195
196void
197LinuxAlphaSystem::PrintThreadInfo::process(ThreadContext *tc)
198{
199 Linux::ThreadInfo ti(tc);
200
201 DPRINTF(Thread, "Currently Executing Thread %s, pid %d, started at: %d\n",
202 ti.curTaskName(), ti.curTaskPID(), ti.curTaskStart());
203}
204
205LinuxAlphaSystem *
206LinuxAlphaSystemParams::create()
207{
208 return new LinuxAlphaSystem(this);
209}
|