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/arguments.hh" 44#include "arch/vtophys.hh" 45#include "arch/alpha/idle_event.hh" 46#include "arch/alpha/linux/system.hh" 47#include "arch/alpha/linux/threadinfo.hh" 48#include "arch/alpha/system.hh" 49#include "base/loader/symtab.hh" 50#include "cpu/thread_context.hh" 51#include "cpu/base.hh" 52#include "dev/platform.hh" 53#include "kern/linux/printk.hh" 54#include "kern/linux/events.hh" 55#include "mem/physical.hh" 56#include "mem/port.hh"
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57#include "sim/builder.hh"
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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 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)(Clock::Frequency / 90 p->boot_cpu_frequency)); 91 92 93 /** 94 * EV5 only supports 127 ASNs so we are going to tell the kernel that the 95 * paritiuclar EV6 we have only supports 127 asns. 96 * @todo At some point we should change ev5.hh and the palcode to support 97 * 255 ASNs. 98 */ 99 if (kernelSymtab->findAddress("dp264_mv", addr)) 100 virtPort.write(addr + 0x18, LittleEndianGuest::htog((uint32_t)127)); 101 else 102 panic("could not find dp264_mv\n"); 103 104#ifndef NDEBUG 105 kernelPanicEvent = addKernelFuncEvent<BreakPCEvent>("panic"); 106 if (!kernelPanicEvent) 107 panic("could not find kernel symbol \'panic\'"); 108 109#if 0 110 kernelDieEvent = addKernelFuncEvent<BreakPCEvent>("die_if_kernel"); 111 if (!kernelDieEvent) 112 panic("could not find kernel symbol \'die_if_kernel\'"); 113#endif 114 115#endif 116 117 /** 118 * Any time ide_delay_50ms, calibarte_delay or 119 * determine_cpu_caches is called just skip the 120 * function. Currently determine_cpu_caches only is used put 121 * information in proc, however if that changes in the future we 122 * will have to fill in the cache size variables appropriately. 123 */ 124 125 skipIdeDelay50msEvent = 126 addKernelFuncEvent<SkipFuncEvent>("ide_delay_50ms"); 127 skipDelayLoopEvent = 128 addKernelFuncEvent<SkipDelayLoopEvent>("calibrate_delay"); 129 skipCacheProbeEvent = 130 addKernelFuncEvent<SkipFuncEvent>("determine_cpu_caches"); 131 debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk"); 132 idleStartEvent = addKernelFuncEvent<IdleStartEvent>("cpu_idle"); 133 134 // Disable for now as it runs into panic() calls in VPTr methods 135 // (see sim/vptr.hh). Once those bugs are fixed, we can 136 // re-enable, but we should find a better way to turn it on than 137 // using DTRACE(Thread), since looking at a trace flag at tick 0 138 // leads to non-intuitive behavior with --trace-start. 139 if (false && kernelSymtab->findAddress("alpha_switch_to", addr)) { 140 printThreadEvent = new PrintThreadInfo(&pcEventQueue, "threadinfo", 141 addr + sizeof(MachInst) * 6); 142 } else { 143 printThreadEvent = NULL; 144 } 145} 146 147LinuxAlphaSystem::~LinuxAlphaSystem() 148{ 149#ifndef NDEBUG 150 delete kernelPanicEvent; 151#endif 152 delete skipIdeDelay50msEvent; 153 delete skipDelayLoopEvent; 154 delete skipCacheProbeEvent; 155 delete debugPrintkEvent; 156 delete idleStartEvent; 157 delete printThreadEvent; 158} 159 160 161void 162LinuxAlphaSystem::setDelayLoop(ThreadContext *tc) 163{ 164 Addr addr = 0; 165 if (kernelSymtab->findAddress("loops_per_jiffy", addr)) { 166 Tick cpuFreq = tc->getCpuPtr()->frequency(); 167 Tick intrFreq = platform->intrFrequency(); 168 VirtualPort *vp; 169 170 vp = tc->getVirtPort(); 171 vp->writeHtoG(addr, (uint32_t)((cpuFreq / intrFreq) * 0.9988)); 172 tc->delVirtPort(vp); 173 } 174} 175 176 177void 178LinuxAlphaSystem::SkipDelayLoopEvent::process(ThreadContext *tc) 179{ 180 SkipFuncEvent::process(tc); 181 // calculate and set loops_per_jiffy 182 ((LinuxAlphaSystem *)tc->getSystemPtr())->setDelayLoop(tc); 183} 184 185void 186LinuxAlphaSystem::PrintThreadInfo::process(ThreadContext *tc) 187{ 188 Linux::ThreadInfo ti(tc); 189 190 DPRINTF(Thread, "Currently Executing Thread %s, pid %d, started at: %d\n", 191 ti.curTaskName(), ti.curTaskPID(), ti.curTaskStart()); 192} 193
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195
196BEGIN_DECLARE_SIM_OBJECT_PARAMS(LinuxAlphaSystem)
197
198 Param<Tick> boot_cpu_frequency;
199 SimObjectParam<PhysicalMemory *> physmem;
200 SimpleEnumParam<System::MemoryMode> mem_mode;
201
202 Param<string> kernel;
203 Param<string> console;
204 Param<string> pal;
205
206 Param<string> boot_osflags;
207 Param<string> readfile;
208 Param<string> symbolfile;
209 Param<unsigned int> init_param;
210
211 Param<uint64_t> system_type;
212 Param<uint64_t> system_rev;
213
214END_DECLARE_SIM_OBJECT_PARAMS(LinuxAlphaSystem)
215
216BEGIN_INIT_SIM_OBJECT_PARAMS(LinuxAlphaSystem)
217
218 INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"),
219 INIT_PARAM(physmem, "phsyical memory"),
220 INIT_ENUM_PARAM(mem_mode, "Memory Mode, (1=atomic, 2=timing)",
221 System::MemoryModeStrings),
222 INIT_PARAM(kernel, "file that contains the kernel code"),
223 INIT_PARAM(console, "file that contains the console code"),
224 INIT_PARAM(pal, "file that contains palcode"),
225 INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot",
226 "a"),
227 INIT_PARAM_DFLT(readfile, "file to read startup script from", ""),
228 INIT_PARAM_DFLT(symbolfile, "file to read symbols from", ""),
229 INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0),
230 INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34),
231 INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10)
232
233END_INIT_SIM_OBJECT_PARAMS(LinuxAlphaSystem)
234
235CREATE_SIM_OBJECT(LinuxAlphaSystem)
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194LinuxAlphaSystem * 195LinuxAlphaSystemParams::create() |
196{
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237 AlphaSystem::Params *p = new AlphaSystem::Params;
238 p->name = getInstanceName();
239 p->boot_cpu_frequency = boot_cpu_frequency;
240 p->physmem = physmem;
241 p->mem_mode = mem_mode;
242 p->kernel_path = kernel;
243 p->console_path = console;
244 p->palcode = pal;
245 p->boot_osflags = boot_osflags;
246 p->init_param = init_param;
247 p->readfile = readfile;
248 p->symbolfile = symbolfile;
249 p->system_type = system_type;
250 p->system_rev = system_rev;
251 return new LinuxAlphaSystem(p);
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197 return new LinuxAlphaSystem(this); |
198}
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253
254REGISTER_SIM_OBJECT("LinuxAlphaSystem", LinuxAlphaSystem)
255
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