physical.cc revision 4762
12391SN/A/* 22391SN/A * Copyright (c) 2001-2005 The Regents of The University of Michigan 32391SN/A * All rights reserved. 42391SN/A * 52391SN/A * Redistribution and use in source and binary forms, with or without 62391SN/A * modification, are permitted provided that the following conditions are 72391SN/A * met: redistributions of source code must retain the above copyright 82391SN/A * notice, this list of conditions and the following disclaimer; 92391SN/A * redistributions in binary form must reproduce the above copyright 102391SN/A * notice, this list of conditions and the following disclaimer in the 112391SN/A * documentation and/or other materials provided with the distribution; 122391SN/A * neither the name of the copyright holders nor the names of its 132391SN/A * contributors may be used to endorse or promote products derived from 142391SN/A * this software without specific prior written permission. 152391SN/A * 162391SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172391SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182391SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192391SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202391SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212391SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222391SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232391SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242391SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252391SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262391SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Ron Dreslinski 292914Ssaidi@eecs.umich.edu * Ali Saidi 302391SN/A */ 312391SN/A 322391SN/A#include <sys/types.h> 332391SN/A#include <sys/mman.h> 342391SN/A#include <errno.h> 352391SN/A#include <fcntl.h> 362391SN/A#include <unistd.h> 372391SN/A#include <zlib.h> 382391SN/A 392391SN/A#include <iostream> 402391SN/A#include <string> 412391SN/A 423348Sbinkertn@umich.edu#include "arch/isa_traits.hh" 432391SN/A#include "base/misc.hh" 442391SN/A#include "config/full_system.hh" 453879Ssaidi@eecs.umich.edu#include "mem/packet_access.hh" 462394SN/A#include "mem/physical.hh" 472415SN/A#include "sim/eventq.hh" 483348Sbinkertn@umich.edu#include "sim/host.hh" 492394SN/A 502391SN/Ausing namespace std; 512423SN/Ausing namespace TheISA; 522391SN/A 534762Snate@binkert.orgPhysicalMemory::PhysicalMemory(const Params *p) 544762Snate@binkert.org : MemObject(p), pmemAddr(NULL), lat(p->latency) 552391SN/A{ 564762Snate@binkert.org if (params()->range.size() % TheISA::PageBytes != 0) 572391SN/A panic("Memory Size not divisible by page size\n"); 582391SN/A 592391SN/A int map_flags = MAP_ANON | MAP_PRIVATE; 604762Snate@binkert.org pmemAddr = (uint8_t *)mmap(NULL, params()->range.size(), PROT_READ | PROT_WRITE, 613918Ssaidi@eecs.umich.edu map_flags, -1, 0); 622391SN/A 633012Ssaidi@eecs.umich.edu if (pmemAddr == (void *)MAP_FAILED) { 642391SN/A perror("mmap"); 652391SN/A fatal("Could not mmap!\n"); 662391SN/A } 672391SN/A 683751Sgblack@eecs.umich.edu //If requested, initialize all the memory to 0 694762Snate@binkert.org if (p->zero) 704762Snate@binkert.org memset(pmemAddr, 0, p->range.size()); 713751Sgblack@eecs.umich.edu 723012Ssaidi@eecs.umich.edu pagePtr = 0; 732391SN/A} 742391SN/A 752541SN/Avoid 762541SN/APhysicalMemory::init() 772541SN/A{ 784470Sstever@eecs.umich.edu if (ports.size() == 0) { 794470Sstever@eecs.umich.edu fatal("PhysicalMemory object %s is unconnected!", name()); 804470Sstever@eecs.umich.edu } 814470Sstever@eecs.umich.edu 824467Sstever@eecs.umich.edu for (PortIterator pi = ports.begin(); pi != ports.end(); ++pi) { 834467Sstever@eecs.umich.edu if (*pi) 844467Sstever@eecs.umich.edu (*pi)->sendStatusChange(Port::RangeChange); 854467Sstever@eecs.umich.edu } 862541SN/A} 872541SN/A 882391SN/APhysicalMemory::~PhysicalMemory() 892391SN/A{ 903012Ssaidi@eecs.umich.edu if (pmemAddr) 914762Snate@binkert.org munmap((char*)pmemAddr, params()->range.size()); 922416SN/A //Remove memPorts? 932391SN/A} 942391SN/A 952391SN/AAddr 962391SN/APhysicalMemory::new_page() 972391SN/A{ 983012Ssaidi@eecs.umich.edu Addr return_addr = pagePtr << LogVMPageSize; 994040Ssaidi@eecs.umich.edu return_addr += start(); 1002391SN/A 1013012Ssaidi@eecs.umich.edu ++pagePtr; 1022391SN/A return return_addr; 1032391SN/A} 1042391SN/A 1052408SN/Aint 1062408SN/APhysicalMemory::deviceBlockSize() 1072408SN/A{ 1082409SN/A //Can accept anysize request 1092409SN/A return 0; 1102408SN/A} 1112408SN/A 1123012Ssaidi@eecs.umich.eduTick 1133349Sbinkertn@umich.eduPhysicalMemory::calculateLatency(PacketPtr pkt) 1143012Ssaidi@eecs.umich.edu{ 1153012Ssaidi@eecs.umich.edu return lat; 1163012Ssaidi@eecs.umich.edu} 1172413SN/A 1183170Sstever@eecs.umich.edu 1193170Sstever@eecs.umich.edu 1203170Sstever@eecs.umich.edu// Add load-locked to tracking list. Should only be called if the 1213170Sstever@eecs.umich.edu// operation is a load and the LOCKED flag is set. 1223170Sstever@eecs.umich.eduvoid 1233170Sstever@eecs.umich.eduPhysicalMemory::trackLoadLocked(Request *req) 1243170Sstever@eecs.umich.edu{ 1253170Sstever@eecs.umich.edu Addr paddr = LockedAddr::mask(req->getPaddr()); 1263170Sstever@eecs.umich.edu 1273170Sstever@eecs.umich.edu // first we check if we already have a locked addr for this 1283170Sstever@eecs.umich.edu // xc. Since each xc only gets one, we just update the 1293170Sstever@eecs.umich.edu // existing record with the new address. 1303170Sstever@eecs.umich.edu list<LockedAddr>::iterator i; 1313170Sstever@eecs.umich.edu 1323170Sstever@eecs.umich.edu for (i = lockedAddrList.begin(); i != lockedAddrList.end(); ++i) { 1333170Sstever@eecs.umich.edu if (i->matchesContext(req)) { 1343170Sstever@eecs.umich.edu DPRINTF(LLSC, "Modifying lock record: cpu %d thread %d addr %#x\n", 1353170Sstever@eecs.umich.edu req->getCpuNum(), req->getThreadNum(), paddr); 1363170Sstever@eecs.umich.edu i->addr = paddr; 1373170Sstever@eecs.umich.edu return; 1383170Sstever@eecs.umich.edu } 1393170Sstever@eecs.umich.edu } 1403170Sstever@eecs.umich.edu 1413170Sstever@eecs.umich.edu // no record for this xc: need to allocate a new one 1423170Sstever@eecs.umich.edu DPRINTF(LLSC, "Adding lock record: cpu %d thread %d addr %#x\n", 1433170Sstever@eecs.umich.edu req->getCpuNum(), req->getThreadNum(), paddr); 1443170Sstever@eecs.umich.edu lockedAddrList.push_front(LockedAddr(req)); 1453170Sstever@eecs.umich.edu} 1463170Sstever@eecs.umich.edu 1473170Sstever@eecs.umich.edu 1483170Sstever@eecs.umich.edu// Called on *writes* only... both regular stores and 1493170Sstever@eecs.umich.edu// store-conditional operations. Check for conventional stores which 1503170Sstever@eecs.umich.edu// conflict with locked addresses, and for success/failure of store 1513170Sstever@eecs.umich.edu// conditionals. 1523170Sstever@eecs.umich.edubool 1533170Sstever@eecs.umich.eduPhysicalMemory::checkLockedAddrList(Request *req) 1543170Sstever@eecs.umich.edu{ 1553170Sstever@eecs.umich.edu Addr paddr = LockedAddr::mask(req->getPaddr()); 1563170Sstever@eecs.umich.edu bool isLocked = req->isLocked(); 1573170Sstever@eecs.umich.edu 1583170Sstever@eecs.umich.edu // Initialize return value. Non-conditional stores always 1593170Sstever@eecs.umich.edu // succeed. Assume conditional stores will fail until proven 1603170Sstever@eecs.umich.edu // otherwise. 1613170Sstever@eecs.umich.edu bool success = !isLocked; 1623170Sstever@eecs.umich.edu 1633170Sstever@eecs.umich.edu // Iterate over list. Note that there could be multiple matching 1643170Sstever@eecs.umich.edu // records, as more than one context could have done a load locked 1653170Sstever@eecs.umich.edu // to this location. 1663170Sstever@eecs.umich.edu list<LockedAddr>::iterator i = lockedAddrList.begin(); 1673170Sstever@eecs.umich.edu 1683170Sstever@eecs.umich.edu while (i != lockedAddrList.end()) { 1693170Sstever@eecs.umich.edu 1703170Sstever@eecs.umich.edu if (i->addr == paddr) { 1713170Sstever@eecs.umich.edu // we have a matching address 1723170Sstever@eecs.umich.edu 1733170Sstever@eecs.umich.edu if (isLocked && i->matchesContext(req)) { 1743170Sstever@eecs.umich.edu // it's a store conditional, and as far as the memory 1753170Sstever@eecs.umich.edu // system can tell, the requesting context's lock is 1763170Sstever@eecs.umich.edu // still valid. 1773170Sstever@eecs.umich.edu DPRINTF(LLSC, "StCond success: cpu %d thread %d addr %#x\n", 1783170Sstever@eecs.umich.edu req->getCpuNum(), req->getThreadNum(), paddr); 1793170Sstever@eecs.umich.edu success = true; 1803170Sstever@eecs.umich.edu } 1813170Sstever@eecs.umich.edu 1823170Sstever@eecs.umich.edu // Get rid of our record of this lock and advance to next 1833170Sstever@eecs.umich.edu DPRINTF(LLSC, "Erasing lock record: cpu %d thread %d addr %#x\n", 1843170Sstever@eecs.umich.edu i->cpuNum, i->threadNum, paddr); 1853170Sstever@eecs.umich.edu i = lockedAddrList.erase(i); 1863170Sstever@eecs.umich.edu } 1873170Sstever@eecs.umich.edu else { 1883170Sstever@eecs.umich.edu // no match: advance to next record 1893170Sstever@eecs.umich.edu ++i; 1903170Sstever@eecs.umich.edu } 1913170Sstever@eecs.umich.edu } 1923170Sstever@eecs.umich.edu 1933170Sstever@eecs.umich.edu if (isLocked) { 1944040Ssaidi@eecs.umich.edu req->setExtraData(success ? 1 : 0); 1953170Sstever@eecs.umich.edu } 1963170Sstever@eecs.umich.edu 1973170Sstever@eecs.umich.edu return success; 1983170Sstever@eecs.umich.edu} 1993170Sstever@eecs.umich.edu 2003029Ssaidi@eecs.umich.eduvoid 2013349Sbinkertn@umich.eduPhysicalMemory::doFunctionalAccess(PacketPtr pkt) 2022413SN/A{ 2034040Ssaidi@eecs.umich.edu assert(pkt->getAddr() >= start() && 2044040Ssaidi@eecs.umich.edu pkt->getAddr() + pkt->getSize() <= start() + size()); 2052414SN/A 2063175Srdreslin@umich.edu if (pkt->isRead()) { 2073170Sstever@eecs.umich.edu if (pkt->req->isLocked()) { 2083170Sstever@eecs.umich.edu trackLoadLocked(pkt->req); 2093170Sstever@eecs.umich.edu } 2104040Ssaidi@eecs.umich.edu memcpy(pkt->getPtr<uint8_t>(), pmemAddr + pkt->getAddr() - start(), 2112641Sstever@eecs.umich.edu pkt->getSize()); 2123879Ssaidi@eecs.umich.edu#if TRACING_ON 2133879Ssaidi@eecs.umich.edu switch (pkt->getSize()) { 2143879Ssaidi@eecs.umich.edu case sizeof(uint64_t): 2153879Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Read of size %i on address 0x%x data 0x%x\n", 2163879Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr(),pkt->get<uint64_t>()); 2173879Ssaidi@eecs.umich.edu break; 2183879Ssaidi@eecs.umich.edu case sizeof(uint32_t): 2193879Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Read of size %i on address 0x%x data 0x%x\n", 2203879Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr(),pkt->get<uint32_t>()); 2213879Ssaidi@eecs.umich.edu break; 2223879Ssaidi@eecs.umich.edu case sizeof(uint16_t): 2233879Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Read of size %i on address 0x%x data 0x%x\n", 2243879Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr(),pkt->get<uint16_t>()); 2253879Ssaidi@eecs.umich.edu break; 2263879Ssaidi@eecs.umich.edu case sizeof(uint8_t): 2273879Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Read of size %i on address 0x%x data 0x%x\n", 2283879Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr(),pkt->get<uint8_t>()); 2293879Ssaidi@eecs.umich.edu break; 2303879Ssaidi@eecs.umich.edu default: 2313879Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Read of size %i on address 0x%x\n", 2323879Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr()); 2333879Ssaidi@eecs.umich.edu } 2343879Ssaidi@eecs.umich.edu#endif 2353175Srdreslin@umich.edu } 2363175Srdreslin@umich.edu else if (pkt->isWrite()) { 2373170Sstever@eecs.umich.edu if (writeOK(pkt->req)) { 2384040Ssaidi@eecs.umich.edu memcpy(pmemAddr + pkt->getAddr() - start(), pkt->getPtr<uint8_t>(), 2394040Ssaidi@eecs.umich.edu pkt->getSize()); 2403879Ssaidi@eecs.umich.edu#if TRACING_ON 2413879Ssaidi@eecs.umich.edu switch (pkt->getSize()) { 2423879Ssaidi@eecs.umich.edu case sizeof(uint64_t): 2433879Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Write of size %i on address 0x%x data 0x%x\n", 2443879Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr(),pkt->get<uint64_t>()); 2453879Ssaidi@eecs.umich.edu break; 2463879Ssaidi@eecs.umich.edu case sizeof(uint32_t): 2473879Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Write of size %i on address 0x%x data 0x%x\n", 2483879Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr(),pkt->get<uint32_t>()); 2493879Ssaidi@eecs.umich.edu break; 2503879Ssaidi@eecs.umich.edu case sizeof(uint16_t): 2513879Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Write of size %i on address 0x%x data 0x%x\n", 2523879Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr(),pkt->get<uint16_t>()); 2533879Ssaidi@eecs.umich.edu break; 2543879Ssaidi@eecs.umich.edu case sizeof(uint8_t): 2553879Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Write of size %i on address 0x%x data 0x%x\n", 2563879Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr(),pkt->get<uint8_t>()); 2573879Ssaidi@eecs.umich.edu break; 2583879Ssaidi@eecs.umich.edu default: 2593879Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Write of size %i on address 0x%x\n", 2603879Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr()); 2613879Ssaidi@eecs.umich.edu } 2623879Ssaidi@eecs.umich.edu#endif 2632631SN/A } 2644040Ssaidi@eecs.umich.edu } else if (pkt->isInvalidate()) { 2653175Srdreslin@umich.edu //upgrade or invalidate 2663175Srdreslin@umich.edu pkt->flags |= SATISFIED; 2674040Ssaidi@eecs.umich.edu } else if (pkt->isReadWrite()) { 2684040Ssaidi@eecs.umich.edu IntReg overwrite_val; 2694040Ssaidi@eecs.umich.edu bool overwrite_mem; 2704040Ssaidi@eecs.umich.edu uint64_t condition_val64; 2714040Ssaidi@eecs.umich.edu uint32_t condition_val32; 2724040Ssaidi@eecs.umich.edu 2734040Ssaidi@eecs.umich.edu assert(sizeof(IntReg) >= pkt->getSize()); 2744040Ssaidi@eecs.umich.edu 2754040Ssaidi@eecs.umich.edu overwrite_mem = true; 2764040Ssaidi@eecs.umich.edu // keep a copy of our possible write value, and copy what is at the 2774040Ssaidi@eecs.umich.edu // memory address into the packet 2784052Ssaidi@eecs.umich.edu std::memcpy(&overwrite_val, pkt->getPtr<uint8_t>(), pkt->getSize()); 2794052Ssaidi@eecs.umich.edu std::memcpy(pkt->getPtr<uint8_t>(), pmemAddr + pkt->getAddr() - start(), 2804040Ssaidi@eecs.umich.edu pkt->getSize()); 2814040Ssaidi@eecs.umich.edu 2824040Ssaidi@eecs.umich.edu if (pkt->req->isCondSwap()) { 2834040Ssaidi@eecs.umich.edu if (pkt->getSize() == sizeof(uint64_t)) { 2844052Ssaidi@eecs.umich.edu condition_val64 = pkt->req->getExtraData(); 2854052Ssaidi@eecs.umich.edu overwrite_mem = !std::memcmp(&condition_val64, pmemAddr + 2864052Ssaidi@eecs.umich.edu pkt->getAddr() - start(), sizeof(uint64_t)); 2874040Ssaidi@eecs.umich.edu } else if (pkt->getSize() == sizeof(uint32_t)) { 2884052Ssaidi@eecs.umich.edu condition_val32 = (uint32_t)pkt->req->getExtraData(); 2894052Ssaidi@eecs.umich.edu overwrite_mem = !std::memcmp(&condition_val32, pmemAddr + 2904052Ssaidi@eecs.umich.edu pkt->getAddr() - start(), sizeof(uint32_t)); 2914040Ssaidi@eecs.umich.edu } else 2924040Ssaidi@eecs.umich.edu panic("Invalid size for conditional read/write\n"); 2934040Ssaidi@eecs.umich.edu } 2944040Ssaidi@eecs.umich.edu 2954040Ssaidi@eecs.umich.edu if (overwrite_mem) 2964052Ssaidi@eecs.umich.edu std::memcpy(pmemAddr + pkt->getAddr() - start(), 2974040Ssaidi@eecs.umich.edu &overwrite_val, pkt->getSize()); 2984040Ssaidi@eecs.umich.edu 2994040Ssaidi@eecs.umich.edu#if TRACING_ON 3004040Ssaidi@eecs.umich.edu switch (pkt->getSize()) { 3014040Ssaidi@eecs.umich.edu case sizeof(uint64_t): 3024040Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Read/Write of size %i on address 0x%x old data 0x%x\n", 3034040Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr(),pkt->get<uint64_t>()); 3044040Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "New Data 0x%x %s conditional (0x%x) and %s \n", 3054040Ssaidi@eecs.umich.edu overwrite_mem, pkt->req->isCondSwap() ? "was" : "wasn't", 3064040Ssaidi@eecs.umich.edu condition_val64, overwrite_mem ? "happened" : "didn't happen"); 3074040Ssaidi@eecs.umich.edu break; 3084040Ssaidi@eecs.umich.edu case sizeof(uint32_t): 3094040Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Read/Write of size %i on address 0x%x old data 0x%x\n", 3104040Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr(),pkt->get<uint32_t>()); 3114040Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "New Data 0x%x %s conditional (0x%x) and %s \n", 3124040Ssaidi@eecs.umich.edu overwrite_mem, pkt->req->isCondSwap() ? "was" : "wasn't", 3134040Ssaidi@eecs.umich.edu condition_val32, overwrite_mem ? "happened" : "didn't happen"); 3144040Ssaidi@eecs.umich.edu break; 3154040Ssaidi@eecs.umich.edu case sizeof(uint16_t): 3164040Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Read/Write of size %i on address 0x%x old data 0x%x\n", 3174040Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr(),pkt->get<uint16_t>()); 3184040Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "New Data 0x%x wasn't conditional and happned\n", 3194040Ssaidi@eecs.umich.edu overwrite_mem); 3204040Ssaidi@eecs.umich.edu break; 3214040Ssaidi@eecs.umich.edu case sizeof(uint8_t): 3224040Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Read/Write of size %i on address 0x%x old data 0x%x\n", 3234040Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr(),pkt->get<uint8_t>()); 3244040Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "New Data 0x%x wasn't conditional and happned\n", 3254040Ssaidi@eecs.umich.edu overwrite_mem); 3264040Ssaidi@eecs.umich.edu break; 3274040Ssaidi@eecs.umich.edu default: 3284040Ssaidi@eecs.umich.edu DPRINTF(MemoryAccess, "Read/Write of size %i on address 0x%x\n", 3294040Ssaidi@eecs.umich.edu pkt->getSize(), pkt->getAddr()); 3304040Ssaidi@eecs.umich.edu } 3314040Ssaidi@eecs.umich.edu#endif 3324040Ssaidi@eecs.umich.edu } else { 3332413SN/A panic("unimplemented"); 3342413SN/A } 3352420SN/A 3362641Sstever@eecs.umich.edu pkt->result = Packet::Success; 3372413SN/A} 3382413SN/A 3392413SN/APort * 3402738Sstever@eecs.umich.eduPhysicalMemory::getPort(const std::string &if_name, int idx) 3412413SN/A{ 3424468Sstever@eecs.umich.edu // Accept request for "functional" port for backwards compatibility 3434468Sstever@eecs.umich.edu // with places where this function is called from C++. I'd prefer 3444468Sstever@eecs.umich.edu // to move all these into Python someday. 3454468Sstever@eecs.umich.edu if (if_name == "functional") { 3464468Sstever@eecs.umich.edu return new MemoryPort(csprintf("%s-functional", name()), this); 3474468Sstever@eecs.umich.edu } 3484468Sstever@eecs.umich.edu 3494467Sstever@eecs.umich.edu if (if_name != "port") { 3502462SN/A panic("PhysicalMemory::getPort: unknown port %s requested", if_name); 3512462SN/A } 3524467Sstever@eecs.umich.edu 3534467Sstever@eecs.umich.edu if (idx >= ports.size()) { 3544467Sstever@eecs.umich.edu ports.resize(idx+1); 3554467Sstever@eecs.umich.edu } 3564467Sstever@eecs.umich.edu 3574467Sstever@eecs.umich.edu if (ports[idx] != NULL) { 3584467Sstever@eecs.umich.edu panic("PhysicalMemory::getPort: port %d already assigned", idx); 3594467Sstever@eecs.umich.edu } 3604467Sstever@eecs.umich.edu 3614467Sstever@eecs.umich.edu MemoryPort *port = 3624467Sstever@eecs.umich.edu new MemoryPort(csprintf("%s-port%d", name(), idx), this); 3634467Sstever@eecs.umich.edu 3644467Sstever@eecs.umich.edu ports[idx] = port; 3654467Sstever@eecs.umich.edu return port; 3662413SN/A} 3672413SN/A 3684467Sstever@eecs.umich.edu 3692413SN/Avoid 3702413SN/APhysicalMemory::recvStatusChange(Port::Status status) 3712413SN/A{ 3722413SN/A} 3732413SN/A 3742640Sstever@eecs.umich.eduPhysicalMemory::MemoryPort::MemoryPort(const std::string &_name, 3752640Sstever@eecs.umich.edu PhysicalMemory *_memory) 3762914Ssaidi@eecs.umich.edu : SimpleTimingPort(_name), memory(_memory) 3772413SN/A{ } 3782413SN/A 3792413SN/Avoid 3802413SN/APhysicalMemory::MemoryPort::recvStatusChange(Port::Status status) 3812413SN/A{ 3822413SN/A memory->recvStatusChange(status); 3832413SN/A} 3842413SN/A 3852413SN/Avoid 3862522SN/APhysicalMemory::MemoryPort::getDeviceAddressRanges(AddrRangeList &resp, 3874475Sstever@eecs.umich.edu bool &snoop) 3882413SN/A{ 3892522SN/A memory->getAddressRanges(resp, snoop); 3902497SN/A} 3912497SN/A 3922497SN/Avoid 3934475Sstever@eecs.umich.eduPhysicalMemory::getAddressRanges(AddrRangeList &resp, bool &snoop) 3942497SN/A{ 3954475Sstever@eecs.umich.edu snoop = false; 3962522SN/A resp.clear(); 3974762Snate@binkert.org resp.push_back(RangeSize(start(), params()->range.size())); 3982413SN/A} 3992413SN/A 4002415SN/Aint 4012415SN/APhysicalMemory::MemoryPort::deviceBlockSize() 4022415SN/A{ 4032415SN/A return memory->deviceBlockSize(); 4042415SN/A} 4052413SN/A 4062413SN/ATick 4073349Sbinkertn@umich.eduPhysicalMemory::MemoryPort::recvAtomic(PacketPtr pkt) 4082413SN/A{ 4093029Ssaidi@eecs.umich.edu memory->doFunctionalAccess(pkt); 4103029Ssaidi@eecs.umich.edu return memory->calculateLatency(pkt); 4112413SN/A} 4122413SN/A 4132413SN/Avoid 4143349Sbinkertn@umich.eduPhysicalMemory::MemoryPort::recvFunctional(PacketPtr pkt) 4152413SN/A{ 4164490Sstever@eecs.umich.edu checkFunctional(pkt); 4173612Srdreslin@umich.edu 4183091Sstever@eecs.umich.edu // Default implementation of SimpleTimingPort::recvFunctional() 4193091Sstever@eecs.umich.edu // calls recvAtomic() and throws away the latency; we can save a 4203091Sstever@eecs.umich.edu // little here by just not calculating the latency. 4212413SN/A memory->doFunctionalAccess(pkt); 4222413SN/A} 4232413SN/A 4242914Ssaidi@eecs.umich.eduunsigned int 4252914Ssaidi@eecs.umich.eduPhysicalMemory::drain(Event *de) 4262914Ssaidi@eecs.umich.edu{ 4274467Sstever@eecs.umich.edu int count = 0; 4284467Sstever@eecs.umich.edu for (PortIterator pi = ports.begin(); pi != ports.end(); ++pi) { 4294467Sstever@eecs.umich.edu count += (*pi)->drain(de); 4304467Sstever@eecs.umich.edu } 4314467Sstever@eecs.umich.edu 4322914Ssaidi@eecs.umich.edu if (count) 4332914Ssaidi@eecs.umich.edu changeState(Draining); 4342914Ssaidi@eecs.umich.edu else 4352914Ssaidi@eecs.umich.edu changeState(Drained); 4362914Ssaidi@eecs.umich.edu return count; 4372914Ssaidi@eecs.umich.edu} 4382413SN/A 4392391SN/Avoid 4402391SN/APhysicalMemory::serialize(ostream &os) 4412391SN/A{ 4422391SN/A gzFile compressedMem; 4432391SN/A string filename = name() + ".physmem"; 4442391SN/A 4452391SN/A SERIALIZE_SCALAR(filename); 4462391SN/A 4472391SN/A // write memory file 4482391SN/A string thefile = Checkpoint::dir() + "/" + filename.c_str(); 4492391SN/A int fd = creat(thefile.c_str(), 0664); 4502391SN/A if (fd < 0) { 4512391SN/A perror("creat"); 4522391SN/A fatal("Can't open physical memory checkpoint file '%s'\n", filename); 4532391SN/A } 4542391SN/A 4552391SN/A compressedMem = gzdopen(fd, "wb"); 4562391SN/A if (compressedMem == NULL) 4572391SN/A fatal("Insufficient memory to allocate compression state for %s\n", 4582391SN/A filename); 4592391SN/A 4604762Snate@binkert.org if (gzwrite(compressedMem, pmemAddr, params()->range.size()) != 4614762Snate@binkert.org params()->range.size()) { 4622391SN/A fatal("Write failed on physical memory checkpoint file '%s'\n", 4632391SN/A filename); 4642391SN/A } 4652391SN/A 4662391SN/A if (gzclose(compressedMem)) 4672391SN/A fatal("Close failed on physical memory checkpoint file '%s'\n", 4682391SN/A filename); 4692391SN/A} 4702391SN/A 4712391SN/Avoid 4722391SN/APhysicalMemory::unserialize(Checkpoint *cp, const string §ion) 4732391SN/A{ 4742391SN/A gzFile compressedMem; 4752391SN/A long *tempPage; 4762391SN/A long *pmem_current; 4772391SN/A uint64_t curSize; 4782391SN/A uint32_t bytesRead; 4792391SN/A const int chunkSize = 16384; 4802391SN/A 4812391SN/A 4822391SN/A string filename; 4832391SN/A 4842391SN/A UNSERIALIZE_SCALAR(filename); 4852391SN/A 4862391SN/A filename = cp->cptDir + "/" + filename; 4872391SN/A 4882391SN/A // mmap memoryfile 4892391SN/A int fd = open(filename.c_str(), O_RDONLY); 4902391SN/A if (fd < 0) { 4912391SN/A perror("open"); 4922391SN/A fatal("Can't open physical memory checkpoint file '%s'", filename); 4932391SN/A } 4942391SN/A 4952391SN/A compressedMem = gzdopen(fd, "rb"); 4962391SN/A if (compressedMem == NULL) 4972391SN/A fatal("Insufficient memory to allocate compression state for %s\n", 4982391SN/A filename); 4992391SN/A 5003012Ssaidi@eecs.umich.edu // unmap file that was mmaped in the constructor 5013012Ssaidi@eecs.umich.edu // This is done here to make sure that gzip and open don't muck with our 5023012Ssaidi@eecs.umich.edu // nice large space of memory before we reallocate it 5034762Snate@binkert.org munmap((char*)pmemAddr, params()->range.size()); 5042391SN/A 5054762Snate@binkert.org pmemAddr = (uint8_t *)mmap(NULL, params()->range.size(), 5064762Snate@binkert.org PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); 5072391SN/A 5083012Ssaidi@eecs.umich.edu if (pmemAddr == (void *)MAP_FAILED) { 5092391SN/A perror("mmap"); 5102391SN/A fatal("Could not mmap physical memory!\n"); 5112391SN/A } 5122391SN/A 5132391SN/A curSize = 0; 5142391SN/A tempPage = (long*)malloc(chunkSize); 5152391SN/A if (tempPage == NULL) 5162391SN/A fatal("Unable to malloc memory to read file %s\n", filename); 5172391SN/A 5182391SN/A /* Only copy bytes that are non-zero, so we don't give the VM system hell */ 5194762Snate@binkert.org while (curSize < params()->range.size()) { 5202391SN/A bytesRead = gzread(compressedMem, tempPage, chunkSize); 5214762Snate@binkert.org if (bytesRead != chunkSize && 5224762Snate@binkert.org bytesRead != params()->range.size() - curSize) 5232391SN/A fatal("Read failed on physical memory checkpoint file '%s'" 5242391SN/A " got %d bytes, expected %d or %d bytes\n", 5254762Snate@binkert.org filename, bytesRead, chunkSize, 5264762Snate@binkert.org params()->range.size() - curSize); 5272391SN/A 5282391SN/A assert(bytesRead % sizeof(long) == 0); 5292391SN/A 5302391SN/A for (int x = 0; x < bytesRead/sizeof(long); x++) 5312391SN/A { 5322391SN/A if (*(tempPage+x) != 0) { 5333012Ssaidi@eecs.umich.edu pmem_current = (long*)(pmemAddr + curSize + x * sizeof(long)); 5342391SN/A *pmem_current = *(tempPage+x); 5352391SN/A } 5362391SN/A } 5372391SN/A curSize += bytesRead; 5382391SN/A } 5392391SN/A 5402391SN/A free(tempPage); 5412391SN/A 5422391SN/A if (gzclose(compressedMem)) 5432391SN/A fatal("Close failed on physical memory checkpoint file '%s'\n", 5442391SN/A filename); 5452391SN/A 5462391SN/A} 5472391SN/A 5484762Snate@binkert.orgPhysicalMemory * 5494762Snate@binkert.orgPhysicalMemoryParams::create() 5502391SN/A{ 5514762Snate@binkert.org return new PhysicalMemory(this); 5522391SN/A} 553