backdoor.cc revision 8931
1/* 2 * Copyright (c) 2001-2005 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: Nathan Binkert 29 * Ali Saidi 30 * Steve Reinhardt 31 * Erik Hallnor 32 */ 33 34/** @file 35 * Alpha Console Backdoor Definition 36 */ 37 38#include <cstddef> 39#include <string> 40 41#include "arch/alpha/system.hh" 42#include "base/inifile.hh" 43#include "base/str.hh" 44#include "base/trace.hh" 45#include "cpu/base.hh" 46#include "cpu/thread_context.hh" 47#include "debug/AlphaBackdoor.hh" 48#include "dev/alpha/backdoor.hh" 49#include "dev/alpha/tsunami.hh" 50#include "dev/alpha/tsunami_cchip.hh" 51#include "dev/alpha/tsunami_io.hh" 52#include "dev/platform.hh" 53#include "dev/simple_disk.hh" 54#include "dev/terminal.hh" 55#include "mem/packet.hh" 56#include "mem/packet_access.hh" 57#include "mem/physical.hh" 58#include "params/AlphaBackdoor.hh" 59#include "sim/sim_object.hh" 60 61using namespace std; 62using namespace AlphaISA; 63 64AlphaBackdoor::AlphaBackdoor(const Params *p) 65 : BasicPioDevice(p), disk(p->disk), terminal(p->terminal), 66 system(p->system), cpu(p->cpu) 67{ 68 69 pioSize = sizeof(struct AlphaAccess); 70 71 alphaAccess = new Access(); 72 alphaAccess->last_offset = pioSize - 1; 73 74 alphaAccess->version = ALPHA_ACCESS_VERSION; 75 alphaAccess->diskUnit = 1; 76 77 alphaAccess->diskCount = 0; 78 alphaAccess->diskPAddr = 0; 79 alphaAccess->diskBlock = 0; 80 alphaAccess->diskOperation = 0; 81 alphaAccess->outputChar = 0; 82 alphaAccess->inputChar = 0; 83 std::memset(alphaAccess->cpuStack, 0, sizeof(alphaAccess->cpuStack)); 84 85} 86 87void 88AlphaBackdoor::startup() 89{ 90 system->setAlphaAccess(pioAddr); 91 alphaAccess->numCPUs = system->numContexts(); 92 alphaAccess->kernStart = system->getKernelStart(); 93 alphaAccess->kernEnd = system->getKernelEnd(); 94 alphaAccess->entryPoint = system->getKernelEntry(); 95 alphaAccess->mem_size = system->memSize(); 96 alphaAccess->cpuClock = cpu->frequency() / 1000000; // In MHz 97 Tsunami *tsunami = dynamic_cast<Tsunami *>(params()->platform); 98 if (!tsunami) 99 fatal("Platform is not Tsunami.\n"); 100 alphaAccess->intrClockFrequency = tsunami->io->frequency(); 101} 102 103Tick 104AlphaBackdoor::read(PacketPtr pkt) 105{ 106 107 /** XXX Do we want to push the addr munging to a bus brige or something? So 108 * the device has it's physical address and then the bridge adds on whatever 109 * machine dependent address swizzle is required? 110 */ 111 112 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 113 114 Addr daddr = pkt->getAddr() - pioAddr; 115 116 pkt->allocate(); 117 pkt->makeAtomicResponse(); 118 119 switch (pkt->getSize()) 120 { 121 case sizeof(uint32_t): 122 switch (daddr) 123 { 124 case offsetof(AlphaAccess, last_offset): 125 pkt->set(alphaAccess->last_offset); 126 break; 127 case offsetof(AlphaAccess, version): 128 pkt->set(alphaAccess->version); 129 break; 130 case offsetof(AlphaAccess, numCPUs): 131 pkt->set(alphaAccess->numCPUs); 132 break; 133 case offsetof(AlphaAccess, intrClockFrequency): 134 pkt->set(alphaAccess->intrClockFrequency); 135 break; 136 default: 137 /* Old console code read in everyting as a 32bit int 138 * we now break that for better error checking. 139 */ 140 pkt->setBadAddress(); 141 } 142 DPRINTF(AlphaBackdoor, "read: offset=%#x val=%#x\n", daddr, 143 pkt->get<uint32_t>()); 144 break; 145 case sizeof(uint64_t): 146 switch (daddr) 147 { 148 case offsetof(AlphaAccess, inputChar): 149 pkt->set(terminal->console_in()); 150 break; 151 case offsetof(AlphaAccess, cpuClock): 152 pkt->set(alphaAccess->cpuClock); 153 break; 154 case offsetof(AlphaAccess, mem_size): 155 pkt->set(alphaAccess->mem_size); 156 break; 157 case offsetof(AlphaAccess, kernStart): 158 pkt->set(alphaAccess->kernStart); 159 break; 160 case offsetof(AlphaAccess, kernEnd): 161 pkt->set(alphaAccess->kernEnd); 162 break; 163 case offsetof(AlphaAccess, entryPoint): 164 pkt->set(alphaAccess->entryPoint); 165 break; 166 case offsetof(AlphaAccess, diskUnit): 167 pkt->set(alphaAccess->diskUnit); 168 break; 169 case offsetof(AlphaAccess, diskCount): 170 pkt->set(alphaAccess->diskCount); 171 break; 172 case offsetof(AlphaAccess, diskPAddr): 173 pkt->set(alphaAccess->diskPAddr); 174 break; 175 case offsetof(AlphaAccess, diskBlock): 176 pkt->set(alphaAccess->diskBlock); 177 break; 178 case offsetof(AlphaAccess, diskOperation): 179 pkt->set(alphaAccess->diskOperation); 180 break; 181 case offsetof(AlphaAccess, outputChar): 182 pkt->set(alphaAccess->outputChar); 183 break; 184 default: 185 int cpunum = (daddr - offsetof(AlphaAccess, cpuStack)) / 186 sizeof(alphaAccess->cpuStack[0]); 187 188 if (cpunum >= 0 && cpunum < 64) 189 pkt->set(alphaAccess->cpuStack[cpunum]); 190 else 191 panic("Unknown 64bit access, %#x\n", daddr); 192 } 193 DPRINTF(AlphaBackdoor, "read: offset=%#x val=%#x\n", daddr, 194 pkt->get<uint64_t>()); 195 break; 196 default: 197 pkt->setBadAddress(); 198 } 199 return pioDelay; 200} 201 202Tick 203AlphaBackdoor::write(PacketPtr pkt) 204{ 205 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 206 Addr daddr = pkt->getAddr() - pioAddr; 207 208 uint64_t val = pkt->get<uint64_t>(); 209 assert(pkt->getSize() == sizeof(uint64_t)); 210 211 switch (daddr) { 212 case offsetof(AlphaAccess, diskUnit): 213 alphaAccess->diskUnit = val; 214 break; 215 216 case offsetof(AlphaAccess, diskCount): 217 alphaAccess->diskCount = val; 218 break; 219 220 case offsetof(AlphaAccess, diskPAddr): 221 alphaAccess->diskPAddr = val; 222 break; 223 224 case offsetof(AlphaAccess, diskBlock): 225 alphaAccess->diskBlock = val; 226 break; 227 228 case offsetof(AlphaAccess, diskOperation): 229 if (val == 0x13) 230 disk->read(alphaAccess->diskPAddr, alphaAccess->diskBlock, 231 alphaAccess->diskCount); 232 else 233 panic("Invalid disk operation!"); 234 235 break; 236 237 case offsetof(AlphaAccess, outputChar): 238 terminal->out((char)(val & 0xff)); 239 break; 240 241 default: 242 int cpunum = (daddr - offsetof(AlphaAccess, cpuStack)) / 243 sizeof(alphaAccess->cpuStack[0]); 244 inform("Launching CPU %d @ %d", cpunum, curTick()); 245 assert(val > 0 && "Must not access primary cpu"); 246 if (cpunum >= 0 && cpunum < 64) 247 alphaAccess->cpuStack[cpunum] = val; 248 else 249 panic("Unknown 64bit access, %#x\n", daddr); 250 } 251 252 pkt->makeAtomicResponse(); 253 254 return pioDelay; 255} 256 257void 258AlphaBackdoor::Access::serialize(ostream &os) 259{ 260 SERIALIZE_SCALAR(last_offset); 261 SERIALIZE_SCALAR(version); 262 SERIALIZE_SCALAR(numCPUs); 263 SERIALIZE_SCALAR(mem_size); 264 SERIALIZE_SCALAR(cpuClock); 265 SERIALIZE_SCALAR(intrClockFrequency); 266 SERIALIZE_SCALAR(kernStart); 267 SERIALIZE_SCALAR(kernEnd); 268 SERIALIZE_SCALAR(entryPoint); 269 SERIALIZE_SCALAR(diskUnit); 270 SERIALIZE_SCALAR(diskCount); 271 SERIALIZE_SCALAR(diskPAddr); 272 SERIALIZE_SCALAR(diskBlock); 273 SERIALIZE_SCALAR(diskOperation); 274 SERIALIZE_SCALAR(outputChar); 275 SERIALIZE_SCALAR(inputChar); 276 SERIALIZE_ARRAY(cpuStack,64); 277} 278 279void 280AlphaBackdoor::Access::unserialize(Checkpoint *cp, const std::string §ion) 281{ 282 UNSERIALIZE_SCALAR(last_offset); 283 UNSERIALIZE_SCALAR(version); 284 UNSERIALIZE_SCALAR(numCPUs); 285 UNSERIALIZE_SCALAR(mem_size); 286 UNSERIALIZE_SCALAR(cpuClock); 287 UNSERIALIZE_SCALAR(intrClockFrequency); 288 UNSERIALIZE_SCALAR(kernStart); 289 UNSERIALIZE_SCALAR(kernEnd); 290 UNSERIALIZE_SCALAR(entryPoint); 291 UNSERIALIZE_SCALAR(diskUnit); 292 UNSERIALIZE_SCALAR(diskCount); 293 UNSERIALIZE_SCALAR(diskPAddr); 294 UNSERIALIZE_SCALAR(diskBlock); 295 UNSERIALIZE_SCALAR(diskOperation); 296 UNSERIALIZE_SCALAR(outputChar); 297 UNSERIALIZE_SCALAR(inputChar); 298 UNSERIALIZE_ARRAY(cpuStack, 64); 299} 300 301void 302AlphaBackdoor::serialize(ostream &os) 303{ 304 alphaAccess->serialize(os); 305} 306 307void 308AlphaBackdoor::unserialize(Checkpoint *cp, const std::string §ion) 309{ 310 alphaAccess->unserialize(cp, section); 311} 312 313AlphaBackdoor * 314AlphaBackdoorParams::create() 315{ 316 return new AlphaBackdoor(this); 317} 318