system.cc revision 2036
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 29/** 30 * @file 31 * This code loads the linux kernel, console, pal and patches certain 32 * functions. The symbol tables are loaded so that traces can show 33 * the executing function and we can skip functions. Various delay 34 * loops are skipped and their final values manually computed to speed 35 * up boot time. 36 */ 37 38#include "base/loader/symtab.hh" 39#include "cpu/exec_context.hh" 40#include "cpu/base.hh" 41#include "kern/linux/linux_system.hh" 42#include "kern/linux/linux_threadinfo.hh" 43#include "kern/linux/printk.hh" 44#include "mem/functional/memory_control.hh" 45#include "mem/functional/physical.hh" 46#include "sim/builder.hh" 47#include "sim/byteswap.hh" 48#include "dev/platform.hh" 49#include "targetarch/arguments.hh" 50#include "targetarch/vtophys.hh" 51 52using namespace std; 53 54LinuxSystem::LinuxSystem(Params *p) 55 : System(p) 56{ 57 Addr addr = 0; 58 Addr paddr = 0; 59 60 /** 61 * The symbol swapper_pg_dir marks the beginning of the kernel and 62 * the location of bootloader passed arguments 63 */ 64 if (!kernelSymtab->findAddress("swapper_pg_dir", KernelStart)) { 65 panic("Could not determine start location of kernel"); 66 } 67 68 /** 69 * Since we aren't using a bootloader, we have to copy the 70 * kernel arguments directly into the kernel's memory. 71 */ 72 paddr = vtophys(physmem, CommandLine()); 73 char *commandline = (char *)physmem->dma_addr(paddr, sizeof(uint64_t)); 74 if (commandline) 75 strncpy(commandline, params->boot_osflags.c_str(), CommandLineSize); 76 77 /** 78 * find the address of the est_cycle_freq variable and insert it 79 * so we don't through the lengthly process of trying to 80 * calculated it by using the PIT, RTC, etc. 81 */ 82 if (kernelSymtab->findAddress("est_cycle_freq", addr)) { 83 paddr = vtophys(physmem, addr); 84 uint8_t *est_cycle_frequency = 85 physmem->dma_addr(paddr, sizeof(uint64_t)); 86 87 if (est_cycle_frequency) 88 *(uint64_t *)est_cycle_frequency = 89 Clock::Frequency / p->boot_cpu_frequency; 90 } 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 paddr = vtophys(physmem, addr); 101 char *dp264_mv = (char *)physmem->dma_addr(paddr, sizeof(uint64_t)); 102 103 if (dp264_mv) { 104 *(uint32_t*)(dp264_mv+0x18) = LittleEndianGuest::htog((uint32_t)127); 105 } else 106 panic("could not translate dp264_mv addr\n"); 107 108 } else 109 panic("could not find dp264_mv\n"); 110 111#ifndef NDEBUG 112 kernelPanicEvent = addKernelFuncEvent<BreakPCEvent>("panic"); 113 if (!kernelPanicEvent) 114 panic("could not find kernel symbol \'panic\'"); 115 116#if 0 117 kernelDieEvent = addKernelFuncEvent<BreakPCEvent>("die_if_kernel"); 118 if (!kernelDieEvent) 119 panic("could not find kernel symbol \'die_if_kernel\'"); 120#endif 121 122#endif 123 124 /** 125 * Any time ide_delay_50ms, calibarte_delay or 126 * determine_cpu_caches is called just skip the 127 * function. Currently determine_cpu_caches only is used put 128 * information in proc, however if that changes in the future we 129 * will have to fill in the cache size variables appropriately. 130 */ 131 132 skipIdeDelay50msEvent = 133 addKernelFuncEvent<SkipFuncEvent>("ide_delay_50ms"); 134 skipDelayLoopEvent = 135 addKernelFuncEvent<SkipDelayLoopEvent>("calibrate_delay"); 136 skipCacheProbeEvent = 137 addKernelFuncEvent<SkipFuncEvent>("determine_cpu_caches"); 138 debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk"); 139 idleStartEvent = addKernelFuncEvent<IdleStartEvent>("cpu_idle"); 140 141 if (kernelSymtab->findAddress("alpha_switch_to", addr) && DTRACE(Thread)) { 142 printThreadEvent = new PrintThreadInfo(&pcEventQueue, "threadinfo", 143 addr + sizeof(MachInst) * 6); 144 } else { 145 printThreadEvent = NULL; 146 } 147 148 if (params->bin_int) { 149 intStartEvent = addPalFuncEvent<InterruptStartEvent>("sys_int_21"); 150 if (!intStartEvent) 151 panic("could not find symbol: sys_int_21\n"); 152 153 intEndEvent = addPalFuncEvent<InterruptEndEvent>("rti_to_kern"); 154 if (!intEndEvent) 155 panic("could not find symbol: rti_to_kern\n"); 156 157 intEndEvent2 = addPalFuncEvent<InterruptEndEvent>("rti_to_user"); 158 if (!intEndEvent2) 159 panic("could not find symbol: rti_to_user\n"); 160 161 intEndEvent3 = addKernelFuncEvent<InterruptEndEvent>("do_softirq"); 162 if (!intEndEvent3) 163 panic("could not find symbol: do_softirq\n"); 164 } 165} 166 167LinuxSystem::~LinuxSystem() 168{ 169#ifndef NDEBUG 170 delete kernelPanicEvent; 171#endif 172 delete skipIdeDelay50msEvent; 173 delete skipDelayLoopEvent; 174 delete skipCacheProbeEvent; 175 delete debugPrintkEvent; 176 delete idleStartEvent; 177 delete printThreadEvent; 178 delete intStartEvent; 179 delete intEndEvent; 180 delete intEndEvent2; 181} 182 183 184void 185LinuxSystem::setDelayLoop(ExecContext *xc) 186{ 187 Addr addr = 0; 188 if (kernelSymtab->findAddress("loops_per_jiffy", addr)) { 189 Addr paddr = vtophys(physmem, addr); 190 191 uint8_t *loops_per_jiffy = 192 physmem->dma_addr(paddr, sizeof(uint32_t)); 193 194 Tick cpuFreq = xc->cpu->frequency(); 195 Tick intrFreq = platform->intrFrequency(); 196 *(uint32_t *)loops_per_jiffy = 197 (uint32_t)((cpuFreq / intrFreq) * 0.9988); 198 } 199} 200 201void 202LinuxSystem::SkipDelayLoopEvent::process(ExecContext *xc) 203{ 204 SkipFuncEvent::process(xc); 205 // calculate and set loops_per_jiffy 206 ((LinuxSystem *)xc->system)->setDelayLoop(xc); 207} 208 209void 210LinuxSystem::DebugPrintkEvent::process(ExecContext *xc) 211{ 212 if (DTRACE(DebugPrintf)) { 213 if (!raw) { 214 StringWrap name(xc->system->name() + ".dprintk"); 215 DPRINTFN(""); 216 } 217 218 AlphaArguments args(xc); 219 Printk(args); 220 SkipFuncEvent::process(xc); 221 } 222} 223 224void 225LinuxSystem::PrintThreadInfo::process(ExecContext *xc) 226{ 227 Linux::ThreadInfo ti(xc); 228 229 DPRINTF(Thread, "Currently Executing Thread %s, pid %d, started at: %d\n", 230 ti.curTaskName(), ti.curTaskPID(), ti.curTaskStart()); 231} 232 233 234BEGIN_DECLARE_SIM_OBJECT_PARAMS(LinuxSystem) 235 236 Param<Tick> boot_cpu_frequency; 237 SimObjectParam<MemoryController *> memctrl; 238 SimObjectParam<PhysicalMemory *> physmem; 239 240 Param<string> kernel; 241 Param<string> console; 242 Param<string> pal; 243 244 Param<string> boot_osflags; 245 Param<string> readfile; 246 Param<unsigned int> init_param; 247 248 Param<uint64_t> system_type; 249 Param<uint64_t> system_rev; 250 251 Param<bool> bin; 252 VectorParam<string> binned_fns; 253 Param<bool> bin_int; 254 255END_DECLARE_SIM_OBJECT_PARAMS(LinuxSystem) 256 257BEGIN_INIT_SIM_OBJECT_PARAMS(LinuxSystem) 258 259 INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"), 260 INIT_PARAM(memctrl, "memory controller"), 261 INIT_PARAM(physmem, "phsyical memory"), 262 INIT_PARAM(kernel, "file that contains the kernel code"), 263 INIT_PARAM(console, "file that contains the console code"), 264 INIT_PARAM(pal, "file that contains palcode"), 265 INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot", 266 "a"), 267 INIT_PARAM_DFLT(readfile, "file to read startup script from", ""), 268 INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0), 269 INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34), 270 INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10), 271 INIT_PARAM_DFLT(bin, "is this system to be binned", false), 272 INIT_PARAM(binned_fns, "functions to be broken down and binned"), 273 INIT_PARAM_DFLT(bin_int, "is interrupt code binned seperately?", true) 274 275END_INIT_SIM_OBJECT_PARAMS(LinuxSystem) 276 277CREATE_SIM_OBJECT(LinuxSystem) 278{ 279 System::Params *p = new System::Params; 280 p->name = getInstanceName(); 281 p->boot_cpu_frequency = boot_cpu_frequency; 282 p->memctrl = memctrl; 283 p->physmem = physmem; 284 p->kernel_path = kernel; 285 p->console_path = console; 286 p->palcode = pal; 287 p->boot_osflags = boot_osflags; 288 p->init_param = init_param; 289 p->readfile = readfile; 290 p->system_type = system_type; 291 p->system_rev = system_rev; 292 p->bin = bin; 293 p->binned_fns = binned_fns; 294 p->bin_int = bin_int; 295 return new LinuxSystem(p); 296} 297 298REGISTER_SIM_OBJECT("LinuxSystem", LinuxSystem) 299 300