backdoor.cc revision 8739
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 "config/full_system.hh" 42 43#if FULL_SYSTEM //XXX No AlphaSystem in SE mode. 44#include "arch/alpha/system.hh" 45#endif 46#include "base/inifile.hh" 47#include "base/str.hh" 48#include "base/trace.hh" 49#include "cpu/base.hh" 50#include "cpu/thread_context.hh" 51#include "debug/AlphaBackdoor.hh" 52#include "dev/alpha/backdoor.hh" 53#include "dev/platform.hh" 54#include "dev/simple_disk.hh" 55#include "dev/terminal.hh" 56#include "mem/packet.hh" 57#include "mem/packet_access.hh" 58#include "mem/physical.hh" 59#include "params/AlphaBackdoor.hh" 60#include "sim/sim_object.hh" 61 62using namespace std; 63using namespace AlphaISA; 64 65AlphaBackdoor::AlphaBackdoor(const Params *p) 66 : BasicPioDevice(p), disk(p->disk), terminal(p->terminal), 67#if FULL_SYSTEM //XXX No system pointer in SE mode. 68 system(p->system), 69#endif 70 cpu(p->cpu) 71{ 72 73 pioSize = sizeof(struct AlphaAccess); 74 75 alphaAccess = new Access(); 76 alphaAccess->last_offset = pioSize - 1; 77 78 alphaAccess->version = ALPHA_ACCESS_VERSION; 79 alphaAccess->diskUnit = 1; 80 81 alphaAccess->diskCount = 0; 82 alphaAccess->diskPAddr = 0; 83 alphaAccess->diskBlock = 0; 84 alphaAccess->diskOperation = 0; 85 alphaAccess->outputChar = 0; 86 alphaAccess->inputChar = 0; 87 std::memset(alphaAccess->cpuStack, 0, sizeof(alphaAccess->cpuStack)); 88 89} 90 91void 92AlphaBackdoor::startup() 93{ 94#if FULL_SYSTEM //XXX No system pointer in SE mode. 95 system->setAlphaAccess(pioAddr); 96 alphaAccess->numCPUs = system->numContexts(); 97 alphaAccess->kernStart = system->getKernelStart(); 98 alphaAccess->kernEnd = system->getKernelEnd(); 99 alphaAccess->entryPoint = system->getKernelEntry(); 100 alphaAccess->mem_size = system->physmem->size(); 101 alphaAccess->cpuClock = cpu->frequency() / 1000000; // In MHz 102 alphaAccess->intrClockFrequency = params()->platform->intrFrequency(); 103#endif 104} 105 106Tick 107AlphaBackdoor::read(PacketPtr pkt) 108{ 109 110 /** XXX Do we want to push the addr munging to a bus brige or something? So 111 * the device has it's physical address and then the bridge adds on whatever 112 * machine dependent address swizzle is required? 113 */ 114 115 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 116 117 Addr daddr = pkt->getAddr() - pioAddr; 118 119 pkt->allocate(); 120 pkt->makeAtomicResponse(); 121 122 switch (pkt->getSize()) 123 { 124 case sizeof(uint32_t): 125 switch (daddr) 126 { 127 case offsetof(AlphaAccess, last_offset): 128 pkt->set(alphaAccess->last_offset); 129 break; 130 case offsetof(AlphaAccess, version): 131 pkt->set(alphaAccess->version); 132 break; 133 case offsetof(AlphaAccess, numCPUs): 134 pkt->set(alphaAccess->numCPUs); 135 break; 136 case offsetof(AlphaAccess, intrClockFrequency): 137 pkt->set(alphaAccess->intrClockFrequency); 138 break; 139 default: 140 /* Old console code read in everyting as a 32bit int 141 * we now break that for better error checking. 142 */ 143 pkt->setBadAddress(); 144 } 145 DPRINTF(AlphaBackdoor, "read: offset=%#x val=%#x\n", daddr, 146 pkt->get<uint32_t>()); 147 break; 148 case sizeof(uint64_t): 149 switch (daddr) 150 { 151 case offsetof(AlphaAccess, inputChar): 152 pkt->set(terminal->console_in()); 153 break; 154 case offsetof(AlphaAccess, cpuClock): 155 pkt->set(alphaAccess->cpuClock); 156 break; 157 case offsetof(AlphaAccess, mem_size): 158 pkt->set(alphaAccess->mem_size); 159 break; 160 case offsetof(AlphaAccess, kernStart): 161 pkt->set(alphaAccess->kernStart); 162 break; 163 case offsetof(AlphaAccess, kernEnd): 164 pkt->set(alphaAccess->kernEnd); 165 break; 166 case offsetof(AlphaAccess, entryPoint): 167 pkt->set(alphaAccess->entryPoint); 168 break; 169 case offsetof(AlphaAccess, diskUnit): 170 pkt->set(alphaAccess->diskUnit); 171 break; 172 case offsetof(AlphaAccess, diskCount): 173 pkt->set(alphaAccess->diskCount); 174 break; 175 case offsetof(AlphaAccess, diskPAddr): 176 pkt->set(alphaAccess->diskPAddr); 177 break; 178 case offsetof(AlphaAccess, diskBlock): 179 pkt->set(alphaAccess->diskBlock); 180 break; 181 case offsetof(AlphaAccess, diskOperation): 182 pkt->set(alphaAccess->diskOperation); 183 break; 184 case offsetof(AlphaAccess, outputChar): 185 pkt->set(alphaAccess->outputChar); 186 break; 187 default: 188 int cpunum = (daddr - offsetof(AlphaAccess, cpuStack)) / 189 sizeof(alphaAccess->cpuStack[0]); 190 191 if (cpunum >= 0 && cpunum < 64) 192 pkt->set(alphaAccess->cpuStack[cpunum]); 193 else 194 panic("Unknown 64bit access, %#x\n", daddr); 195 } 196 DPRINTF(AlphaBackdoor, "read: offset=%#x val=%#x\n", daddr, 197 pkt->get<uint64_t>()); 198 break; 199 default: 200 pkt->setBadAddress(); 201 } 202 return pioDelay; 203} 204 205Tick 206AlphaBackdoor::write(PacketPtr pkt) 207{ 208 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 209 Addr daddr = pkt->getAddr() - pioAddr; 210 211 uint64_t val = pkt->get<uint64_t>(); 212 assert(pkt->getSize() == sizeof(uint64_t)); 213 214 switch (daddr) { 215 case offsetof(AlphaAccess, diskUnit): 216 alphaAccess->diskUnit = val; 217 break; 218 219 case offsetof(AlphaAccess, diskCount): 220 alphaAccess->diskCount = val; 221 break; 222 223 case offsetof(AlphaAccess, diskPAddr): 224 alphaAccess->diskPAddr = val; 225 break; 226 227 case offsetof(AlphaAccess, diskBlock): 228 alphaAccess->diskBlock = val; 229 break; 230 231 case offsetof(AlphaAccess, diskOperation): 232 if (val == 0x13) 233 disk->read(alphaAccess->diskPAddr, alphaAccess->diskBlock, 234 alphaAccess->diskCount); 235 else 236 panic("Invalid disk operation!"); 237 238 break; 239 240 case offsetof(AlphaAccess, outputChar): 241 terminal->out((char)(val & 0xff)); 242 break; 243 244 default: 245 int cpunum = (daddr - offsetof(AlphaAccess, cpuStack)) / 246 sizeof(alphaAccess->cpuStack[0]); 247 inform("Launching CPU %d @ %d", cpunum, curTick()); 248 assert(val > 0 && "Must not access primary cpu"); 249 if (cpunum >= 0 && cpunum < 64) 250 alphaAccess->cpuStack[cpunum] = val; 251 else 252 panic("Unknown 64bit access, %#x\n", daddr); 253 } 254 255 pkt->makeAtomicResponse(); 256 257 return pioDelay; 258} 259 260void 261AlphaBackdoor::Access::serialize(ostream &os) 262{ 263 SERIALIZE_SCALAR(last_offset); 264 SERIALIZE_SCALAR(version); 265 SERIALIZE_SCALAR(numCPUs); 266 SERIALIZE_SCALAR(mem_size); 267 SERIALIZE_SCALAR(cpuClock); 268 SERIALIZE_SCALAR(intrClockFrequency); 269 SERIALIZE_SCALAR(kernStart); 270 SERIALIZE_SCALAR(kernEnd); 271 SERIALIZE_SCALAR(entryPoint); 272 SERIALIZE_SCALAR(diskUnit); 273 SERIALIZE_SCALAR(diskCount); 274 SERIALIZE_SCALAR(diskPAddr); 275 SERIALIZE_SCALAR(diskBlock); 276 SERIALIZE_SCALAR(diskOperation); 277 SERIALIZE_SCALAR(outputChar); 278 SERIALIZE_SCALAR(inputChar); 279 SERIALIZE_ARRAY(cpuStack,64); 280} 281 282void 283AlphaBackdoor::Access::unserialize(Checkpoint *cp, const std::string §ion) 284{ 285 UNSERIALIZE_SCALAR(last_offset); 286 UNSERIALIZE_SCALAR(version); 287 UNSERIALIZE_SCALAR(numCPUs); 288 UNSERIALIZE_SCALAR(mem_size); 289 UNSERIALIZE_SCALAR(cpuClock); 290 UNSERIALIZE_SCALAR(intrClockFrequency); 291 UNSERIALIZE_SCALAR(kernStart); 292 UNSERIALIZE_SCALAR(kernEnd); 293 UNSERIALIZE_SCALAR(entryPoint); 294 UNSERIALIZE_SCALAR(diskUnit); 295 UNSERIALIZE_SCALAR(diskCount); 296 UNSERIALIZE_SCALAR(diskPAddr); 297 UNSERIALIZE_SCALAR(diskBlock); 298 UNSERIALIZE_SCALAR(diskOperation); 299 UNSERIALIZE_SCALAR(outputChar); 300 UNSERIALIZE_SCALAR(inputChar); 301 UNSERIALIZE_ARRAY(cpuStack, 64); 302} 303 304void 305AlphaBackdoor::serialize(ostream &os) 306{ 307 alphaAccess->serialize(os); 308} 309 310void 311AlphaBackdoor::unserialize(Checkpoint *cp, const std::string §ion) 312{ 313 alphaAccess->unserialize(cp, section); 314} 315 316AlphaBackdoor * 317AlphaBackdoorParams::create() 318{ 319 return new AlphaBackdoor(this); 320} 321