backdoor.cc revision 11264:dc389d2d2f79
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/storage/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, sizeof(struct AlphaAccess)), 66 disk(p->disk), terminal(p->terminal), 67 system(p->system), cpu(p->cpu) 68{ 69 alphaAccess = new Access(); 70 alphaAccess->last_offset = pioSize - 1; 71 72 alphaAccess->version = ALPHA_ACCESS_VERSION; 73 alphaAccess->diskUnit = 1; 74 75 alphaAccess->diskCount = 0; 76 alphaAccess->diskPAddr = 0; 77 alphaAccess->diskBlock = 0; 78 alphaAccess->diskOperation = 0; 79 alphaAccess->outputChar = 0; 80 alphaAccess->inputChar = 0; 81 std::memset(alphaAccess->cpuStack, 0, sizeof(alphaAccess->cpuStack)); 82 83} 84 85void 86AlphaBackdoor::startup() 87{ 88 system->setAlphaAccess(pioAddr); 89 alphaAccess->numCPUs = system->numContexts(); 90 alphaAccess->kernStart = system->getKernelStart(); 91 alphaAccess->kernEnd = system->getKernelEnd(); 92 alphaAccess->entryPoint = system->getKernelEntry(); 93 alphaAccess->mem_size = system->memSize(); 94 alphaAccess->cpuClock = cpu->frequency() / 1000000; // In MHz 95 Tsunami *tsunami = dynamic_cast<Tsunami *>(params()->platform); 96 if (!tsunami) 97 fatal("Platform is not Tsunami.\n"); 98 alphaAccess->intrClockFrequency = tsunami->io->frequency(); 99} 100 101Tick 102AlphaBackdoor::read(PacketPtr pkt) 103{ 104 105 /** XXX Do we want to push the addr munging to a bus brige or something? So 106 * the device has it's physical address and then the bridge adds on whatever 107 * machine dependent address swizzle is required? 108 */ 109 110 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 111 112 Addr daddr = pkt->getAddr() - pioAddr; 113 114 pkt->makeAtomicResponse(); 115 116 switch (pkt->getSize()) 117 { 118 case sizeof(uint32_t): 119 switch (daddr) 120 { 121 case offsetof(AlphaAccess, last_offset): 122 pkt->set(alphaAccess->last_offset); 123 break; 124 case offsetof(AlphaAccess, version): 125 pkt->set(alphaAccess->version); 126 break; 127 case offsetof(AlphaAccess, numCPUs): 128 pkt->set(alphaAccess->numCPUs); 129 break; 130 case offsetof(AlphaAccess, intrClockFrequency): 131 pkt->set(alphaAccess->intrClockFrequency); 132 break; 133 default: 134 /* Old console code read in everyting as a 32bit int 135 * we now break that for better error checking. 136 */ 137 pkt->setBadAddress(); 138 } 139 DPRINTF(AlphaBackdoor, "read: offset=%#x val=%#x\n", daddr, 140 pkt->get<uint32_t>()); 141 break; 142 case sizeof(uint64_t): 143 switch (daddr) 144 { 145 case offsetof(AlphaAccess, inputChar): 146 pkt->set(terminal->console_in()); 147 break; 148 case offsetof(AlphaAccess, cpuClock): 149 pkt->set(alphaAccess->cpuClock); 150 break; 151 case offsetof(AlphaAccess, mem_size): 152 pkt->set(alphaAccess->mem_size); 153 break; 154 case offsetof(AlphaAccess, kernStart): 155 pkt->set(alphaAccess->kernStart); 156 break; 157 case offsetof(AlphaAccess, kernEnd): 158 pkt->set(alphaAccess->kernEnd); 159 break; 160 case offsetof(AlphaAccess, entryPoint): 161 pkt->set(alphaAccess->entryPoint); 162 break; 163 case offsetof(AlphaAccess, diskUnit): 164 pkt->set(alphaAccess->diskUnit); 165 break; 166 case offsetof(AlphaAccess, diskCount): 167 pkt->set(alphaAccess->diskCount); 168 break; 169 case offsetof(AlphaAccess, diskPAddr): 170 pkt->set(alphaAccess->diskPAddr); 171 break; 172 case offsetof(AlphaAccess, diskBlock): 173 pkt->set(alphaAccess->diskBlock); 174 break; 175 case offsetof(AlphaAccess, diskOperation): 176 pkt->set(alphaAccess->diskOperation); 177 break; 178 case offsetof(AlphaAccess, outputChar): 179 pkt->set(alphaAccess->outputChar); 180 break; 181 default: 182 int cpunum = (daddr - offsetof(AlphaAccess, cpuStack)) / 183 sizeof(alphaAccess->cpuStack[0]); 184 185 if (cpunum >= 0 && cpunum < 64) 186 pkt->set(alphaAccess->cpuStack[cpunum]); 187 else 188 panic("Unknown 64bit access, %#x\n", daddr); 189 } 190 DPRINTF(AlphaBackdoor, "read: offset=%#x val=%#x\n", daddr, 191 pkt->get<uint64_t>()); 192 break; 193 default: 194 pkt->setBadAddress(); 195 } 196 return pioDelay; 197} 198 199Tick 200AlphaBackdoor::write(PacketPtr pkt) 201{ 202 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 203 Addr daddr = pkt->getAddr() - pioAddr; 204 205 uint64_t val = pkt->get<uint64_t>(); 206 assert(pkt->getSize() == sizeof(uint64_t)); 207 208 switch (daddr) { 209 case offsetof(AlphaAccess, diskUnit): 210 alphaAccess->diskUnit = val; 211 break; 212 213 case offsetof(AlphaAccess, diskCount): 214 alphaAccess->diskCount = val; 215 break; 216 217 case offsetof(AlphaAccess, diskPAddr): 218 alphaAccess->diskPAddr = val; 219 break; 220 221 case offsetof(AlphaAccess, diskBlock): 222 alphaAccess->diskBlock = val; 223 break; 224 225 case offsetof(AlphaAccess, diskOperation): 226 if (val == 0x13) 227 disk->read(alphaAccess->diskPAddr, alphaAccess->diskBlock, 228 alphaAccess->diskCount); 229 else 230 panic("Invalid disk operation!"); 231 232 break; 233 234 case offsetof(AlphaAccess, outputChar): 235 terminal->out((char)(val & 0xff)); 236 break; 237 238 default: 239 int cpunum = (daddr - offsetof(AlphaAccess, cpuStack)) / 240 sizeof(alphaAccess->cpuStack[0]); 241 inform("Launching CPU %d @ %d", cpunum, curTick()); 242 assert(val > 0 && "Must not access primary cpu"); 243 if (cpunum >= 0 && cpunum < 64) 244 alphaAccess->cpuStack[cpunum] = val; 245 else 246 panic("Unknown 64bit access, %#x\n", daddr); 247 } 248 249 pkt->makeAtomicResponse(); 250 251 return pioDelay; 252} 253 254void 255AlphaBackdoor::Access::serialize(CheckpointOut &cp) const 256{ 257 SERIALIZE_SCALAR(last_offset); 258 SERIALIZE_SCALAR(version); 259 SERIALIZE_SCALAR(numCPUs); 260 SERIALIZE_SCALAR(mem_size); 261 SERIALIZE_SCALAR(cpuClock); 262 SERIALIZE_SCALAR(intrClockFrequency); 263 SERIALIZE_SCALAR(kernStart); 264 SERIALIZE_SCALAR(kernEnd); 265 SERIALIZE_SCALAR(entryPoint); 266 SERIALIZE_SCALAR(diskUnit); 267 SERIALIZE_SCALAR(diskCount); 268 SERIALIZE_SCALAR(diskPAddr); 269 SERIALIZE_SCALAR(diskBlock); 270 SERIALIZE_SCALAR(diskOperation); 271 SERIALIZE_SCALAR(outputChar); 272 SERIALIZE_SCALAR(inputChar); 273 SERIALIZE_ARRAY(cpuStack,64); 274} 275 276void 277AlphaBackdoor::Access::unserialize(CheckpointIn &cp) 278{ 279 UNSERIALIZE_SCALAR(last_offset); 280 UNSERIALIZE_SCALAR(version); 281 UNSERIALIZE_SCALAR(numCPUs); 282 UNSERIALIZE_SCALAR(mem_size); 283 UNSERIALIZE_SCALAR(cpuClock); 284 UNSERIALIZE_SCALAR(intrClockFrequency); 285 UNSERIALIZE_SCALAR(kernStart); 286 UNSERIALIZE_SCALAR(kernEnd); 287 UNSERIALIZE_SCALAR(entryPoint); 288 UNSERIALIZE_SCALAR(diskUnit); 289 UNSERIALIZE_SCALAR(diskCount); 290 UNSERIALIZE_SCALAR(diskPAddr); 291 UNSERIALIZE_SCALAR(diskBlock); 292 UNSERIALIZE_SCALAR(diskOperation); 293 UNSERIALIZE_SCALAR(outputChar); 294 UNSERIALIZE_SCALAR(inputChar); 295 UNSERIALIZE_ARRAY(cpuStack, 64); 296} 297 298void 299AlphaBackdoor::serialize(CheckpointOut &cp) const 300{ 301 alphaAccess->serialize(cp); 302} 303 304void 305AlphaBackdoor::unserialize(CheckpointIn &cp) 306{ 307 alphaAccess->unserialize(cp); 308} 309 310AlphaBackdoor * 311AlphaBackdoorParams::create() 312{ 313 return new AlphaBackdoor(this); 314} 315