tsunami_pchip.cc revision 6658
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 * Authors: Ali Saidi 29 * Andrew Schultz 30 */ 31 32/** @file 33 * Tsunami PChip (pci) 34 */ 35 36#include <deque> 37#include <string> 38#include <vector> 39 40#include "base/trace.hh" 41#include "config/the_isa.hh" 42#include "dev/alpha/tsunami_pchip.hh" 43#include "dev/alpha/tsunamireg.h" 44#include "dev/alpha/tsunami.hh" 45#include "mem/packet.hh" 46#include "mem/packet_access.hh" 47#include "sim/system.hh" 48 49using namespace std; 50//Should this be AlphaISA? 51using namespace TheISA; 52 53TsunamiPChip::TsunamiPChip(const Params *p) 54: BasicPioDevice(p) 55{ 56 pioSize = 0x1000; 57 58 for (int i = 0; i < 4; i++) { 59 wsba[i] = 0; 60 wsm[i] = 0; 61 tba[i] = 0; 62 } 63 64 // initialize pchip control register 65 pctl = (ULL(0x1) << 20) | (ULL(0x1) << 32) | (ULL(0x2) << 36); 66 67 //Set back pointer in tsunami 68 p->tsunami->pchip = this; 69} 70 71Tick 72TsunamiPChip::read(PacketPtr pkt) 73{ 74 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 75 76 pkt->allocate(); 77 Addr daddr = (pkt->getAddr() - pioAddr) >> 6;; 78 assert(pkt->getSize() == sizeof(uint64_t)); 79 80 81 DPRINTF(Tsunami, "read va=%#x size=%d\n", pkt->getAddr(), pkt->getSize()); 82 83 switch(daddr) { 84 case TSDEV_PC_WSBA0: 85 pkt->set(wsba[0]); 86 break; 87 case TSDEV_PC_WSBA1: 88 pkt->set(wsba[1]); 89 break; 90 case TSDEV_PC_WSBA2: 91 pkt->set(wsba[2]); 92 break; 93 case TSDEV_PC_WSBA3: 94 pkt->set(wsba[3]); 95 break; 96 case TSDEV_PC_WSM0: 97 pkt->set(wsm[0]); 98 break; 99 case TSDEV_PC_WSM1: 100 pkt->set(wsm[1]); 101 break; 102 case TSDEV_PC_WSM2: 103 pkt->set(wsm[2]); 104 break; 105 case TSDEV_PC_WSM3: 106 pkt->set(wsm[3]); 107 break; 108 case TSDEV_PC_TBA0: 109 pkt->set(tba[0]); 110 break; 111 case TSDEV_PC_TBA1: 112 pkt->set(tba[1]); 113 break; 114 case TSDEV_PC_TBA2: 115 pkt->set(tba[2]); 116 break; 117 case TSDEV_PC_TBA3: 118 pkt->set(tba[3]); 119 break; 120 case TSDEV_PC_PCTL: 121 pkt->set(pctl); 122 break; 123 case TSDEV_PC_PLAT: 124 panic("PC_PLAT not implemented\n"); 125 case TSDEV_PC_RES: 126 panic("PC_RES not implemented\n"); 127 case TSDEV_PC_PERROR: 128 pkt->set((uint64_t)0x00); 129 break; 130 case TSDEV_PC_PERRMASK: 131 pkt->set((uint64_t)0x00); 132 break; 133 case TSDEV_PC_PERRSET: 134 panic("PC_PERRSET not implemented\n"); 135 case TSDEV_PC_TLBIV: 136 panic("PC_TLBIV not implemented\n"); 137 case TSDEV_PC_TLBIA: 138 pkt->set((uint64_t)0x00); // shouldn't be readable, but linux 139 break; 140 case TSDEV_PC_PMONCTL: 141 panic("PC_PMONCTL not implemented\n"); 142 case TSDEV_PC_PMONCNT: 143 panic("PC_PMONCTN not implemented\n"); 144 default: 145 panic("Default in PChip Read reached reading 0x%x\n", daddr); 146 } 147 pkt->makeAtomicResponse(); 148 return pioDelay; 149 150} 151 152Tick 153TsunamiPChip::write(PacketPtr pkt) 154{ 155 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 156 Addr daddr = (pkt->getAddr() - pioAddr) >> 6; 157 158 assert(pkt->getSize() == sizeof(uint64_t)); 159 160 DPRINTF(Tsunami, "write - va=%#x size=%d \n", pkt->getAddr(), pkt->getSize()); 161 162 switch(daddr) { 163 case TSDEV_PC_WSBA0: 164 wsba[0] = pkt->get<uint64_t>(); 165 break; 166 case TSDEV_PC_WSBA1: 167 wsba[1] = pkt->get<uint64_t>(); 168 break; 169 case TSDEV_PC_WSBA2: 170 wsba[2] = pkt->get<uint64_t>(); 171 break; 172 case TSDEV_PC_WSBA3: 173 wsba[3] = pkt->get<uint64_t>(); 174 break; 175 case TSDEV_PC_WSM0: 176 wsm[0] = pkt->get<uint64_t>(); 177 break; 178 case TSDEV_PC_WSM1: 179 wsm[1] = pkt->get<uint64_t>(); 180 break; 181 case TSDEV_PC_WSM2: 182 wsm[2] = pkt->get<uint64_t>(); 183 break; 184 case TSDEV_PC_WSM3: 185 wsm[3] = pkt->get<uint64_t>(); 186 break; 187 case TSDEV_PC_TBA0: 188 tba[0] = pkt->get<uint64_t>(); 189 break; 190 case TSDEV_PC_TBA1: 191 tba[1] = pkt->get<uint64_t>(); 192 break; 193 case TSDEV_PC_TBA2: 194 tba[2] = pkt->get<uint64_t>(); 195 break; 196 case TSDEV_PC_TBA3: 197 tba[3] = pkt->get<uint64_t>(); 198 break; 199 case TSDEV_PC_PCTL: 200 pctl = pkt->get<uint64_t>(); 201 break; 202 case TSDEV_PC_PLAT: 203 panic("PC_PLAT not implemented\n"); 204 case TSDEV_PC_RES: 205 panic("PC_RES not implemented\n"); 206 case TSDEV_PC_PERROR: 207 break; 208 case TSDEV_PC_PERRMASK: 209 panic("PC_PERRMASK not implemented\n"); 210 case TSDEV_PC_PERRSET: 211 panic("PC_PERRSET not implemented\n"); 212 case TSDEV_PC_TLBIV: 213 panic("PC_TLBIV not implemented\n"); 214 case TSDEV_PC_TLBIA: 215 break; // value ignored, supposted to invalidate SG TLB 216 case TSDEV_PC_PMONCTL: 217 panic("PC_PMONCTL not implemented\n"); 218 case TSDEV_PC_PMONCNT: 219 panic("PC_PMONCTN not implemented\n"); 220 default: 221 panic("Default in PChip write reached reading 0x%x\n", daddr); 222 223 } // uint64_t 224 225 pkt->makeAtomicResponse(); 226 return pioDelay; 227} 228 229#define DMA_ADDR_MASK ULL(0x3ffffffff) 230 231Addr 232TsunamiPChip::translatePciToDma(Addr busAddr) 233{ 234 // compare the address to the window base registers 235 uint64_t tbaMask = 0; 236 uint64_t baMask = 0; 237 238 uint64_t windowMask = 0; 239 uint64_t windowBase = 0; 240 241 uint64_t pteEntry = 0; 242 243 Addr pteAddr; 244 Addr dmaAddr; 245 246#if 0 247 DPRINTF(IdeDisk, "Translation for bus address: %#x\n", busAddr); 248 for (int i = 0; i < 4; i++) { 249 DPRINTF(IdeDisk, "(%d) base:%#x mask:%#x\n", 250 i, wsba[i], wsm[i]); 251 252 windowBase = wsba[i]; 253 windowMask = ~wsm[i] & (ULL(0xfff) << 20); 254 255 if ((busAddr & windowMask) == (windowBase & windowMask)) { 256 DPRINTF(IdeDisk, "Would have matched %d (wb:%#x wm:%#x --> ba&wm:%#x wb&wm:%#x)\n", 257 i, windowBase, windowMask, (busAddr & windowMask), 258 (windowBase & windowMask)); 259 } 260 } 261#endif 262 263 for (int i = 0; i < 4; i++) { 264 265 windowBase = wsba[i]; 266 windowMask = ~wsm[i] & (ULL(0xfff) << 20); 267 268 if ((busAddr & windowMask) == (windowBase & windowMask)) { 269 270 if (wsba[i] & 0x1) { // see if enabled 271 if (wsba[i] & 0x2) { // see if SG bit is set 272 /** @todo 273 This currently is faked by just doing a direct 274 read from memory, however, to be realistic, this 275 needs to actually do a bus transaction. The process 276 is explained in the tsunami documentation on page 277 10-12 and basically munges the address to look up a 278 PTE from a table in memory and then uses that mapping 279 to create an address for the SG page 280 */ 281 282 tbaMask = ~(((wsm[i] & (ULL(0xfff) << 20)) >> 10) | ULL(0x3ff)); 283 baMask = (wsm[i] & (ULL(0xfff) << 20)) | (ULL(0x7f) << 13); 284 pteAddr = (tba[i] & tbaMask) | ((busAddr & baMask) >> 10); 285 286 pioPort->readBlob(pteAddr, (uint8_t*)&pteEntry, sizeof(uint64_t)); 287 288 dmaAddr = ((pteEntry & ~ULL(0x1)) << 12) | (busAddr & ULL(0x1fff)); 289 290 } else { 291 baMask = (wsm[i] & (ULL(0xfff) << 20)) | ULL(0xfffff); 292 tbaMask = ~baMask; 293 dmaAddr = (tba[i] & tbaMask) | (busAddr & baMask); 294 } 295 296 return (dmaAddr & DMA_ADDR_MASK); 297 } 298 } 299 } 300 301 // if no match was found, then return the original address 302 return busAddr; 303} 304 305Addr 306TsunamiPChip::calcConfigAddr(int bus, int dev, int func) 307{ 308 assert(func < 8); 309 assert(dev < 32); 310 assert(bus == 0); 311 312 return TsunamiPciBus0Config | (func << 8) | (dev << 11); 313} 314 315Addr 316TsunamiPChip::calcIOAddr(Addr addr) 317{ 318 return TSUNAMI_PCI0_IO + addr; 319} 320 321Addr 322TsunamiPChip::calcMemAddr(Addr addr) 323{ 324 return TSUNAMI_PCI0_MEMORY + addr; 325} 326 327void 328TsunamiPChip::serialize(std::ostream &os) 329{ 330 SERIALIZE_SCALAR(pctl); 331 SERIALIZE_ARRAY(wsba, 4); 332 SERIALIZE_ARRAY(wsm, 4); 333 SERIALIZE_ARRAY(tba, 4); 334} 335 336void 337TsunamiPChip::unserialize(Checkpoint *cp, const std::string §ion) 338{ 339 UNSERIALIZE_SCALAR(pctl); 340 UNSERIALIZE_ARRAY(wsba, 4); 341 UNSERIALIZE_ARRAY(wsm, 4); 342 UNSERIALIZE_ARRAY(tba, 4); 343} 344 345 346TsunamiPChip * 347TsunamiPChipParams::create() 348{ 349 return new TsunamiPChip(this); 350} 351