system.cc revision 1895
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 "dev/platform.hh" 48#include "targetarch/arguments.hh" 49#include "targetarch/vtophys.hh" 50 51using namespace std; 52 53LinuxSystem::LinuxSystem(Params *p) 54 : System(p) 55{ 56 Addr addr = 0; 57 Addr paddr = 0; 58 59 /** 60 * The symbol swapper_pg_dir marks the beginning of the kernel and 61 * the location of bootloader passed arguments 62 */ 63 if (!kernelSymtab->findAddress("swapper_pg_dir", KernelStart)) { 64 panic("Could not determine start location of kernel"); 65 } 66 67 /** 68 * Since we aren't using a bootloader, we have to copy the 69 * kernel arguments directly into the kernel's memory. 70 */ 71 paddr = vtophys(physmem, CommandLine()); 72 char *commandline = (char *)physmem->dma_addr(paddr, sizeof(uint64_t)); 73 if (commandline) 74 strncpy(commandline, params->boot_osflags.c_str(), CommandLineSize); 75 76 /** 77 * find the address of the est_cycle_freq variable and insert it 78 * so we don't through the lengthly process of trying to 79 * calculated it by using the PIT, RTC, etc. 80 */ 81 if (kernelSymtab->findAddress("est_cycle_freq", addr)) { 82 paddr = vtophys(physmem, addr); 83 uint8_t *est_cycle_frequency = 84 physmem->dma_addr(paddr, sizeof(uint64_t)); 85 86 if (est_cycle_frequency) 87 *(uint64_t *)est_cycle_frequency = 88 Clock::Frequency / p->boot_cpu_frequency; 89 } 90 91 92 /** 93 * EV5 only supports 127 ASNs so we are going to tell the kernel that the 94 * paritiuclar EV6 we have only supports 127 asns. 95 * @todo At some point we should change ev5.hh and the palcode to support 96 * 255 ASNs. 97 */ 98 if (kernelSymtab->findAddress("dp264_mv", addr)) { 99 paddr = vtophys(physmem, addr); 100 char *dp264_mv = (char *)physmem->dma_addr(paddr, sizeof(uint64_t)); 101 102 if (dp264_mv) { 103 *(uint32_t*)(dp264_mv+0x18) = htog((uint32_t)127); 104 } else 105 panic("could not translate dp264_mv addr\n"); 106 107 } else 108 panic("could not find dp264_mv\n"); 109 110#ifndef NDEBUG 111 kernelPanicEvent = addKernelFuncEvent<BreakPCEvent>("panic"); 112 if (!kernelPanicEvent) 113 panic("could not find kernel symbol \'panic\'"); 114 115#if 0 116 kernelDieEvent = addKernelFuncEvent<BreakPCEvent>("die_if_kernel"); 117 if (!kernelDieEvent) 118 panic("could not find kernel symbol \'die_if_kernel\'"); 119#endif 120 121#endif 122 123 /** 124 * Any time ide_delay_50ms, calibarte_delay or 125 * determine_cpu_caches is called just skip the 126 * function. Currently determine_cpu_caches only is used put 127 * information in proc, however if that changes in the future we 128 * will have to fill in the cache size variables appropriately. 129 */ 130 131 skipIdeDelay50msEvent = 132 addKernelFuncEvent<SkipFuncEvent>("ide_delay_50ms"); 133 skipDelayLoopEvent = 134 addKernelFuncEvent<SkipDelayLoopEvent>("calibrate_delay"); 135 skipCacheProbeEvent = 136 addKernelFuncEvent<SkipFuncEvent>("determine_cpu_caches"); 137 debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk"); 138 idleStartEvent = addKernelFuncEvent<IdleStartEvent>("cpu_idle"); 139 140 if (kernelSymtab->findAddress("alpha_switch_to", addr) && DTRACE(Thread)) { 141 printThreadEvent = new PrintThreadInfo(&pcEventQueue, "threadinfo", 142 addr + sizeof(MachInst) * 6); 143 } else { 144 printThreadEvent = NULL; 145 } 146 147 if (params->bin_int) { 148 intStartEvent = addPalFuncEvent<InterruptStartEvent>("sys_int_21"); 149 if (!intStartEvent) 150 panic("could not find symbol: sys_int_21\n"); 151 152 intEndEvent = addPalFuncEvent<InterruptEndEvent>("rti_to_kern"); 153 if (!intEndEvent) 154 panic("could not find symbol: rti_to_kern\n"); 155 156 intEndEvent2 = addPalFuncEvent<InterruptEndEvent>("rti_to_user"); 157 if (!intEndEvent2) 158 panic("could not find symbol: rti_to_user\n"); 159 160 intEndEvent3 = addKernelFuncEvent<InterruptEndEvent>("do_softirq"); 161 if (!intEndEvent3) 162 panic("could not find symbol: do_softirq\n"); 163 } 164} 165 166LinuxSystem::~LinuxSystem() 167{ 168#ifndef NDEBUG 169 delete kernelPanicEvent; 170#endif 171 delete skipIdeDelay50msEvent; 172 delete skipDelayLoopEvent; 173 delete skipCacheProbeEvent; 174 delete debugPrintkEvent; 175 delete idleStartEvent; 176 delete printThreadEvent; 177 delete intStartEvent; 178 delete intEndEvent; 179 delete intEndEvent2; 180} 181 182 183void 184LinuxSystem::setDelayLoop(ExecContext *xc) 185{ 186 Addr addr = 0; 187 if (kernelSymtab->findAddress("loops_per_jiffy", addr)) { 188 Addr paddr = vtophys(physmem, addr); 189 190 uint8_t *loops_per_jiffy = 191 physmem->dma_addr(paddr, sizeof(uint32_t)); 192 193 Tick cpuFreq = xc->cpu->frequency(); 194 Tick intrFreq = platform->intrFrequency(); 195 *(uint32_t *)loops_per_jiffy = 196 (uint32_t)((cpuFreq / intrFreq) * 0.9988); 197 } 198} 199 200void 201LinuxSystem::SkipDelayLoopEvent::process(ExecContext *xc) 202{ 203 SkipFuncEvent::process(xc); 204 // calculate and set loops_per_jiffy 205 ((LinuxSystem *)xc->system)->setDelayLoop(xc); 206} 207 208void 209LinuxSystem::DebugPrintkEvent::process(ExecContext *xc) 210{ 211 if (DTRACE(DebugPrintf)) { 212 if (!raw) { 213 StringWrap name(xc->system->name() + ".dprintk"); 214 DPRINTFN(""); 215 } 216 217 AlphaArguments args(xc); 218 Printk(args); 219 SkipFuncEvent::process(xc); 220 } 221} 222 223void 224LinuxSystem::PrintThreadInfo::process(ExecContext *xc) 225{ 226 Linux::ThreadInfo ti(xc); 227 228 DPRINTF(Thread, "Currently Executing Thread %s, pid %d, started at: %d\n", 229 ti.curTaskName(), ti.curTaskPID(), ti.curTaskStart()); 230} 231 232 233BEGIN_DECLARE_SIM_OBJECT_PARAMS(LinuxSystem) 234 235 Param<Tick> boot_cpu_frequency; 236 SimObjectParam<MemoryController *> memctrl; 237 SimObjectParam<PhysicalMemory *> physmem; 238 239 Param<string> kernel; 240 Param<string> console; 241 Param<string> pal; 242 243 Param<string> boot_osflags; 244 Param<string> readfile; 245 Param<unsigned int> init_param; 246 247 Param<uint64_t> system_type; 248 Param<uint64_t> system_rev; 249 250 Param<bool> bin; 251 VectorParam<string> binned_fns; 252 Param<bool> bin_int; 253 254END_DECLARE_SIM_OBJECT_PARAMS(LinuxSystem) 255 256BEGIN_INIT_SIM_OBJECT_PARAMS(LinuxSystem) 257 258 INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"), 259 INIT_PARAM(memctrl, "memory controller"), 260 INIT_PARAM(physmem, "phsyical memory"), 261 INIT_PARAM(kernel, "file that contains the kernel code"), 262 INIT_PARAM(console, "file that contains the console code"), 263 INIT_PARAM(pal, "file that contains palcode"), 264 INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot", 265 "a"), 266 INIT_PARAM_DFLT(readfile, "file to read startup script from", ""), 267 INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0), 268 INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34), 269 INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10), 270 INIT_PARAM_DFLT(bin, "is this system to be binned", false), 271 INIT_PARAM(binned_fns, "functions to be broken down and binned"), 272 INIT_PARAM_DFLT(bin_int, "is interrupt code binned seperately?", true) 273 274END_INIT_SIM_OBJECT_PARAMS(LinuxSystem) 275 276CREATE_SIM_OBJECT(LinuxSystem) 277{ 278 System::Params *p = new System::Params; 279 p->name = getInstanceName(); 280 p->boot_cpu_frequency = boot_cpu_frequency; 281 p->memctrl = memctrl; 282 p->physmem = physmem; 283 p->kernel_path = kernel; 284 p->console_path = console; 285 p->palcode = pal; 286 p->boot_osflags = boot_osflags; 287 p->init_param = init_param; 288 p->readfile = readfile; 289 p->system_type = system_type; 290 p->system_rev = system_rev; 291 p->bin = bin; 292 p->binned_fns = binned_fns; 293 p->bin_int = bin_int; 294 return new LinuxSystem(p); 295} 296 297REGISTER_SIM_OBJECT("LinuxSystem", LinuxSystem) 298 299