system.cc revision 2684
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/linux/system.hh" 46#include "arch/alpha/linux/threadinfo.hh" 47#include "arch/alpha/system.hh" 48#include "base/loader/symtab.hh" 49#include "cpu/thread_context.hh" 50#include "cpu/base.hh" 51#include "dev/platform.hh" 52#include "kern/linux/printk.hh" 53#include "kern/linux/events.hh" 54#include "mem/physical.hh" 55#include "mem/port.hh" 56#include "sim/builder.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 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 if (kernelSymtab->findAddress("alpha_switch_to", addr) && DTRACE(Thread)) { 135 printThreadEvent = new PrintThreadInfo(&pcEventQueue, "threadinfo", 136 addr + sizeof(MachInst) * 6); 137 } else { 138 printThreadEvent = NULL; 139 } 140 141 if (params()->bin_int) { 142 intStartEvent = addPalFuncEvent<InterruptStartEvent>("sys_int_21"); 143 if (!intStartEvent) 144 panic("could not find symbol: sys_int_21\n"); 145 146 intEndEvent = addPalFuncEvent<InterruptEndEvent>("rti_to_kern"); 147 if (!intEndEvent) 148 panic("could not find symbol: rti_to_kern\n"); 149 150 intEndEvent2 = addPalFuncEvent<InterruptEndEvent>("rti_to_user"); 151 if (!intEndEvent2) 152 panic("could not find symbol: rti_to_user\n"); 153 154 intEndEvent3 = addKernelFuncEvent<InterruptEndEvent>("do_softirq"); 155 if (!intEndEvent3) 156 panic("could not find symbol: do_softirq\n"); 157 } 158} 159 160LinuxAlphaSystem::~LinuxAlphaSystem() 161{ 162#ifndef NDEBUG 163 delete kernelPanicEvent; 164#endif 165 delete skipIdeDelay50msEvent; 166 delete skipDelayLoopEvent; 167 delete skipCacheProbeEvent; 168 delete debugPrintkEvent; 169 delete idleStartEvent; 170 delete printThreadEvent; 171 delete intStartEvent; 172 delete intEndEvent; 173 delete intEndEvent2; 174} 175 176 177void 178LinuxAlphaSystem::setDelayLoop(ThreadContext *tc) 179{ 180 Addr addr = 0; 181 if (kernelSymtab->findAddress("loops_per_jiffy", addr)) { 182 Tick cpuFreq = tc->getCpuPtr()->frequency(); 183 Tick intrFreq = platform->intrFrequency(); 184 VirtualPort *vp; 185 186 vp = tc->getVirtPort(); 187 vp->writeHtoG(addr, (uint32_t)((cpuFreq / intrFreq) * 0.9988)); 188 tc->delVirtPort(vp); 189 } 190} 191 192 193void 194LinuxAlphaSystem::SkipDelayLoopEvent::process(ThreadContext *tc) 195{ 196 SkipFuncEvent::process(tc); 197 // calculate and set loops_per_jiffy 198 ((LinuxAlphaSystem *)tc->getSystemPtr())->setDelayLoop(tc); 199} 200 201void 202LinuxAlphaSystem::PrintThreadInfo::process(ThreadContext *tc) 203{ 204 Linux::ThreadInfo ti(tc); 205 206 DPRINTF(Thread, "Currently Executing Thread %s, pid %d, started at: %d\n", 207 ti.curTaskName(), ti.curTaskPID(), ti.curTaskStart()); 208} 209 210 211BEGIN_DECLARE_SIM_OBJECT_PARAMS(LinuxAlphaSystem) 212 213 Param<Tick> boot_cpu_frequency; 214 SimObjectParam<PhysicalMemory *> physmem; 215 216 Param<string> kernel; 217 Param<string> console; 218 Param<string> pal; 219 220 Param<string> boot_osflags; 221 Param<string> readfile; 222 Param<unsigned int> init_param; 223 224 Param<uint64_t> system_type; 225 Param<uint64_t> system_rev; 226 227 Param<bool> bin; 228 VectorParam<string> binned_fns; 229 Param<bool> bin_int; 230 231END_DECLARE_SIM_OBJECT_PARAMS(LinuxAlphaSystem) 232 233BEGIN_INIT_SIM_OBJECT_PARAMS(LinuxAlphaSystem) 234 235 INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"), 236 INIT_PARAM(physmem, "phsyical memory"), 237 INIT_PARAM(kernel, "file that contains the kernel code"), 238 INIT_PARAM(console, "file that contains the console code"), 239 INIT_PARAM(pal, "file that contains palcode"), 240 INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot", 241 "a"), 242 INIT_PARAM_DFLT(readfile, "file to read startup script from", ""), 243 INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0), 244 INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34), 245 INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10), 246 INIT_PARAM_DFLT(bin, "is this system to be binned", false), 247 INIT_PARAM(binned_fns, "functions to be broken down and binned"), 248 INIT_PARAM_DFLT(bin_int, "is interrupt code binned seperately?", true) 249 250END_INIT_SIM_OBJECT_PARAMS(LinuxAlphaSystem) 251 252CREATE_SIM_OBJECT(LinuxAlphaSystem) 253{ 254 AlphaSystem::Params *p = new AlphaSystem::Params; 255 p->name = getInstanceName(); 256 p->boot_cpu_frequency = boot_cpu_frequency; 257 p->physmem = physmem; 258 p->kernel_path = kernel; 259 p->console_path = console; 260 p->palcode = pal; 261 p->boot_osflags = boot_osflags; 262 p->init_param = init_param; 263 p->readfile = readfile; 264 p->system_type = system_type; 265 p->system_rev = system_rev; 266 p->bin = bin; 267 p->binned_fns = binned_fns; 268 p->bin_int = bin_int; 269 return new LinuxAlphaSystem(p); 270} 271 272REGISTER_SIM_OBJECT("LinuxAlphaSystem", LinuxAlphaSystem) 273 274