system.cc revision 4741
1451SN/A/* 21762SN/A * Copyright (c) 2004-2005 The Regents of The University of Michigan 3451SN/A * All rights reserved. 4451SN/A * 5451SN/A * Redistribution and use in source and binary forms, with or without 6451SN/A * modification, are permitted provided that the following conditions are 7451SN/A * met: redistributions of source code must retain the above copyright 8451SN/A * notice, this list of conditions and the following disclaimer; 9451SN/A * redistributions in binary form must reproduce the above copyright 10451SN/A * notice, this list of conditions and the following disclaimer in the 11451SN/A * documentation and/or other materials provided with the distribution; 12451SN/A * neither the name of the copyright holders nor the names of its 13451SN/A * contributors may be used to endorse or promote products derived from 14451SN/A * this software without specific prior written permission. 15451SN/A * 16451SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17451SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18451SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19451SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20451SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21451SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22451SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23451SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24451SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25451SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26451SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Ali Saidi 292665Ssaidi@eecs.umich.edu * Lisa Hsu 302665Ssaidi@eecs.umich.edu * Nathan Binkert 312665Ssaidi@eecs.umich.edu * Steve Reinhardt 32451SN/A */ 33451SN/A 34885SN/A/** 35885SN/A * @file 361040SN/A * This code loads the linux kernel, console, pal and patches certain 371040SN/A * functions. The symbol tables are loaded so that traces can show 381040SN/A * the executing function and we can skip functions. Various delay 391040SN/A * loops are skipped and their final values manually computed to speed 401040SN/A * up boot time. 41885SN/A */ 42885SN/A 432212SN/A#include "arch/arguments.hh" 442212SN/A#include "arch/vtophys.hh" 453565Sgblack@eecs.umich.edu#include "arch/alpha/idle_event.hh" 462212SN/A#include "arch/alpha/linux/system.hh" 472212SN/A#include "arch/alpha/linux/threadinfo.hh" 482158SN/A#include "arch/alpha/system.hh" 491180SN/A#include "base/loader/symtab.hh" 502680Sktlim@umich.edu#include "cpu/thread_context.hh" 511717SN/A#include "cpu/base.hh" 522212SN/A#include "dev/platform.hh" 531885SN/A#include "kern/linux/printk.hh" 542212SN/A#include "kern/linux/events.hh" 552521SN/A#include "mem/physical.hh" 562521SN/A#include "mem/port.hh" 57451SN/A#include "sim/builder.hh" 582036SN/A#include "sim/byteswap.hh" 59451SN/A 60451SN/Ausing namespace std; 612212SN/Ausing namespace AlphaISA; 622212SN/Ausing namespace Linux; 63451SN/A 642212SN/ALinuxAlphaSystem::LinuxAlphaSystem(Params *p) 652158SN/A : AlphaSystem(p) 66451SN/A{ 67451SN/A Addr addr = 0; 681855SN/A 691855SN/A /** 701855SN/A * The symbol swapper_pg_dir marks the beginning of the kernel and 711855SN/A * the location of bootloader passed arguments 721855SN/A */ 731855SN/A if (!kernelSymtab->findAddress("swapper_pg_dir", KernelStart)) { 741855SN/A panic("Could not determine start location of kernel"); 751855SN/A } 761855SN/A 771855SN/A /** 781855SN/A * Since we aren't using a bootloader, we have to copy the 791855SN/A * kernel arguments directly into the kernel's memory. 801855SN/A */ 812521SN/A virtPort.writeBlob(CommandLine(), (uint8_t*)params()->boot_osflags.c_str(), 822548SN/A params()->boot_osflags.length()+1); 83836SN/A 84885SN/A /** 851070SN/A * find the address of the est_cycle_freq variable and insert it 861070SN/A * so we don't through the lengthly process of trying to 871070SN/A * calculated it by using the PIT, RTC, etc. 88885SN/A */ 892521SN/A if (kernelSymtab->findAddress("est_cycle_freq", addr)) 902521SN/A virtPort.write(addr, (uint64_t)(Clock::Frequency / 912521SN/A p->boot_cpu_frequency)); 92451SN/A 93836SN/A 94885SN/A /** 95943SN/A * EV5 only supports 127 ASNs so we are going to tell the kernel that the 96943SN/A * paritiuclar EV6 we have only supports 127 asns. 97943SN/A * @todo At some point we should change ev5.hh and the palcode to support 98943SN/A * 255 ASNs. 99943SN/A */ 1002521SN/A if (kernelSymtab->findAddress("dp264_mv", addr)) 1012521SN/A virtPort.write(addr + 0x18, LittleEndianGuest::htog((uint32_t)127)); 1022521SN/A else 1031070SN/A panic("could not find dp264_mv\n"); 104943SN/A 1051492SN/A#ifndef NDEBUG 1061885SN/A kernelPanicEvent = addKernelFuncEvent<BreakPCEvent>("panic"); 1071885SN/A if (!kernelPanicEvent) 108451SN/A panic("could not find kernel symbol \'panic\'"); 1091885SN/A 1101646SN/A#if 0 1111885SN/A kernelDieEvent = addKernelFuncEvent<BreakPCEvent>("die_if_kernel"); 1121885SN/A if (!kernelDieEvent) 1131492SN/A panic("could not find kernel symbol \'die_if_kernel\'"); 1141646SN/A#endif 1151492SN/A 116860SN/A#endif 117451SN/A 118885SN/A /** 1191895SN/A * Any time ide_delay_50ms, calibarte_delay or 1201070SN/A * determine_cpu_caches is called just skip the 1211070SN/A * function. Currently determine_cpu_caches only is used put 1221070SN/A * information in proc, however if that changes in the future we 1231070SN/A * will have to fill in the cache size variables appropriately. 124885SN/A */ 125848SN/A 1261885SN/A skipIdeDelay50msEvent = 1271885SN/A addKernelFuncEvent<SkipFuncEvent>("ide_delay_50ms"); 1281885SN/A skipDelayLoopEvent = 1291885SN/A addKernelFuncEvent<SkipDelayLoopEvent>("calibrate_delay"); 1301885SN/A skipCacheProbeEvent = 1311885SN/A addKernelFuncEvent<SkipFuncEvent>("determine_cpu_caches"); 1321885SN/A debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk"); 1331885SN/A idleStartEvent = addKernelFuncEvent<IdleStartEvent>("cpu_idle"); 1341885SN/A 1354741Sstever@eecs.umich.edu // Disable for now as it runs into panic() calls in VPTr methods 1364741Sstever@eecs.umich.edu // (see sim/vptr.hh). Once those bugs are fixed, we can 1374741Sstever@eecs.umich.edu // re-enable, but we should find a better way to turn it on than 1384741Sstever@eecs.umich.edu // using DTRACE(Thread), since looking at a trace flag at tick 0 1394741Sstever@eecs.umich.edu // leads to non-intuitive behavior with --trace-start. 1404741Sstever@eecs.umich.edu if (false && kernelSymtab->findAddress("alpha_switch_to", addr)) { 1411885SN/A printThreadEvent = new PrintThreadInfo(&pcEventQueue, "threadinfo", 1421885SN/A addr + sizeof(MachInst) * 6); 1431885SN/A } else { 1441885SN/A printThreadEvent = NULL; 1451657SN/A } 146451SN/A} 147451SN/A 1482212SN/ALinuxAlphaSystem::~LinuxAlphaSystem() 149451SN/A{ 1501492SN/A#ifndef NDEBUG 151451SN/A delete kernelPanicEvent; 1521070SN/A#endif 153869SN/A delete skipIdeDelay50msEvent; 154869SN/A delete skipDelayLoopEvent; 155869SN/A delete skipCacheProbeEvent; 1561070SN/A delete debugPrintkEvent; 1571070SN/A delete idleStartEvent; 1581082SN/A delete printThreadEvent; 159451SN/A} 160451SN/A 161882SN/A 162803SN/Avoid 1632680Sktlim@umich.eduLinuxAlphaSystem::setDelayLoop(ThreadContext *tc) 164803SN/A{ 165803SN/A Addr addr = 0; 166803SN/A if (kernelSymtab->findAddress("loops_per_jiffy", addr)) { 1672680Sktlim@umich.edu Tick cpuFreq = tc->getCpuPtr()->frequency(); 1681634SN/A Tick intrFreq = platform->intrFrequency(); 1692684Ssaidi@eecs.umich.edu VirtualPort *vp; 1702684Ssaidi@eecs.umich.edu 1712684Ssaidi@eecs.umich.edu vp = tc->getVirtPort(); 1722684Ssaidi@eecs.umich.edu vp->writeHtoG(addr, (uint32_t)((cpuFreq / intrFreq) * 0.9988)); 1732684Ssaidi@eecs.umich.edu tc->delVirtPort(vp); 174803SN/A } 175803SN/A} 176803SN/A 1772212SN/A 1781885SN/Avoid 1792680Sktlim@umich.eduLinuxAlphaSystem::SkipDelayLoopEvent::process(ThreadContext *tc) 1801885SN/A{ 1812680Sktlim@umich.edu SkipFuncEvent::process(tc); 1821885SN/A // calculate and set loops_per_jiffy 1832680Sktlim@umich.edu ((LinuxAlphaSystem *)tc->getSystemPtr())->setDelayLoop(tc); 1841885SN/A} 1851885SN/A 1861885SN/Avoid 1872680Sktlim@umich.eduLinuxAlphaSystem::PrintThreadInfo::process(ThreadContext *tc) 1881885SN/A{ 1892680Sktlim@umich.edu Linux::ThreadInfo ti(tc); 1901885SN/A 1911885SN/A DPRINTF(Thread, "Currently Executing Thread %s, pid %d, started at: %d\n", 1921885SN/A ti.curTaskName(), ti.curTaskPID(), ti.curTaskStart()); 1931885SN/A} 1941885SN/A 1951885SN/A 1962212SN/ABEGIN_DECLARE_SIM_OBJECT_PARAMS(LinuxAlphaSystem) 197451SN/A 1981634SN/A Param<Tick> boot_cpu_frequency; 199451SN/A SimObjectParam<PhysicalMemory *> physmem; 2002902Ssaidi@eecs.umich.edu SimpleEnumParam<System::MemoryMode> mem_mode; 201451SN/A 2021310SN/A Param<string> kernel; 2031310SN/A Param<string> console; 2041310SN/A Param<string> pal; 2051070SN/A 206451SN/A Param<string> boot_osflags; 2071070SN/A Param<string> readfile; 2082358SN/A Param<string> symbolfile; 2091070SN/A Param<unsigned int> init_param; 2101070SN/A 2111070SN/A Param<uint64_t> system_type; 2121070SN/A Param<uint64_t> system_rev; 2131070SN/A 2142212SN/AEND_DECLARE_SIM_OBJECT_PARAMS(LinuxAlphaSystem) 215451SN/A 2162212SN/ABEGIN_INIT_SIM_OBJECT_PARAMS(LinuxAlphaSystem) 217451SN/A 2181634SN/A INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"), 219451SN/A INIT_PARAM(physmem, "phsyical memory"), 2202902Ssaidi@eecs.umich.edu INIT_ENUM_PARAM(mem_mode, "Memory Mode, (1=atomic, 2=timing)", 2212902Ssaidi@eecs.umich.edu System::MemoryModeStrings), 2221310SN/A INIT_PARAM(kernel, "file that contains the kernel code"), 2231310SN/A INIT_PARAM(console, "file that contains the console code"), 2241310SN/A INIT_PARAM(pal, "file that contains palcode"), 225451SN/A INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot", 2261070SN/A "a"), 2271070SN/A INIT_PARAM_DFLT(readfile, "file to read startup script from", ""), 2282358SN/A INIT_PARAM_DFLT(symbolfile, "file to read symbols from", ""), 2291070SN/A INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0), 2301070SN/A INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34), 2312343SN/A INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10) 232451SN/A 2332212SN/AEND_INIT_SIM_OBJECT_PARAMS(LinuxAlphaSystem) 234451SN/A 2352212SN/ACREATE_SIM_OBJECT(LinuxAlphaSystem) 236451SN/A{ 2372158SN/A AlphaSystem::Params *p = new AlphaSystem::Params; 2381070SN/A p->name = getInstanceName(); 2391634SN/A p->boot_cpu_frequency = boot_cpu_frequency; 2401070SN/A p->physmem = physmem; 2412902Ssaidi@eecs.umich.edu p->mem_mode = mem_mode; 2421310SN/A p->kernel_path = kernel; 2431310SN/A p->console_path = console; 2441310SN/A p->palcode = pal; 2451070SN/A p->boot_osflags = boot_osflags; 2461070SN/A p->init_param = init_param; 2471070SN/A p->readfile = readfile; 2482358SN/A p->symbolfile = symbolfile; 2491070SN/A p->system_type = system_type; 2501070SN/A p->system_rev = system_rev; 2512212SN/A return new LinuxAlphaSystem(p); 252451SN/A} 253451SN/A 2542212SN/AREGISTER_SIM_OBJECT("LinuxAlphaSystem", LinuxAlphaSystem) 2551070SN/A 256