physical.hh 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 292391SN/A */ 302391SN/A 312391SN/A/* @file 322391SN/A */ 332391SN/A 342391SN/A#ifndef __PHYSICAL_MEMORY_HH__ 352391SN/A#define __PHYSICAL_MEMORY_HH__ 362391SN/A 374762Snate@binkert.org#include <map> 384762Snate@binkert.org#include <string> 394762Snate@binkert.org 402391SN/A#include "base/range.hh" 412462SN/A#include "mem/mem_object.hh" 422414SN/A#include "mem/packet.hh" 432914Ssaidi@eecs.umich.edu#include "mem/tport.hh" 444762Snate@binkert.org#include "params/PhysicalMemory.hh" 452415SN/A#include "sim/eventq.hh" 462462SN/A 472391SN/A// 482391SN/A// Functional model for a contiguous block of physical memory. (i.e. RAM) 492391SN/A// 502462SN/Aclass PhysicalMemory : public MemObject 512391SN/A{ 522914Ssaidi@eecs.umich.edu class MemoryPort : public SimpleTimingPort 532413SN/A { 542413SN/A PhysicalMemory *memory; 552413SN/A 562413SN/A public: 572413SN/A 582640Sstever@eecs.umich.edu MemoryPort(const std::string &_name, PhysicalMemory *_memory); 592413SN/A 602413SN/A protected: 612413SN/A 623349Sbinkertn@umich.edu virtual Tick recvAtomic(PacketPtr pkt); 632413SN/A 643349Sbinkertn@umich.edu virtual void recvFunctional(PacketPtr pkt); 652413SN/A 662413SN/A virtual void recvStatusChange(Status status); 672413SN/A 682521SN/A virtual void getDeviceAddressRanges(AddrRangeList &resp, 694475Sstever@eecs.umich.edu bool &snoop); 702413SN/A 712413SN/A virtual int deviceBlockSize(); 722413SN/A }; 732413SN/A 742416SN/A int numPorts; 752416SN/A 762413SN/A 772391SN/A private: 782391SN/A // prevent copying of a MainMemory object 792391SN/A PhysicalMemory(const PhysicalMemory &specmem); 802391SN/A const PhysicalMemory &operator=(const PhysicalMemory &specmem); 812391SN/A 822391SN/A protected: 833170Sstever@eecs.umich.edu 843170Sstever@eecs.umich.edu class LockedAddr { 853170Sstever@eecs.umich.edu public: 863170Sstever@eecs.umich.edu // on alpha, minimum LL/SC granularity is 16 bytes, so lower 873170Sstever@eecs.umich.edu // bits need to masked off. 883170Sstever@eecs.umich.edu static const Addr Addr_Mask = 0xf; 893170Sstever@eecs.umich.edu 903170Sstever@eecs.umich.edu static Addr mask(Addr paddr) { return (paddr & ~Addr_Mask); } 913170Sstever@eecs.umich.edu 923170Sstever@eecs.umich.edu Addr addr; // locked address 933170Sstever@eecs.umich.edu int cpuNum; // locking CPU 943170Sstever@eecs.umich.edu int threadNum; // locking thread ID within CPU 953170Sstever@eecs.umich.edu 963170Sstever@eecs.umich.edu // check for matching execution context 973170Sstever@eecs.umich.edu bool matchesContext(Request *req) 983170Sstever@eecs.umich.edu { 993170Sstever@eecs.umich.edu return (cpuNum == req->getCpuNum() && 1003170Sstever@eecs.umich.edu threadNum == req->getThreadNum()); 1013170Sstever@eecs.umich.edu } 1023170Sstever@eecs.umich.edu 1033170Sstever@eecs.umich.edu LockedAddr(Request *req) 1043170Sstever@eecs.umich.edu : addr(mask(req->getPaddr())), 1053170Sstever@eecs.umich.edu cpuNum(req->getCpuNum()), 1063170Sstever@eecs.umich.edu threadNum(req->getThreadNum()) 1073170Sstever@eecs.umich.edu { 1083170Sstever@eecs.umich.edu } 1093170Sstever@eecs.umich.edu }; 1103170Sstever@eecs.umich.edu 1113170Sstever@eecs.umich.edu std::list<LockedAddr> lockedAddrList; 1123170Sstever@eecs.umich.edu 1133170Sstever@eecs.umich.edu // helper function for checkLockedAddrs(): we really want to 1143170Sstever@eecs.umich.edu // inline a quick check for an empty locked addr list (hopefully 1153170Sstever@eecs.umich.edu // the common case), and do the full list search (if necessary) in 1163170Sstever@eecs.umich.edu // this out-of-line function 1173170Sstever@eecs.umich.edu bool checkLockedAddrList(Request *req); 1183170Sstever@eecs.umich.edu 1193170Sstever@eecs.umich.edu // Record the address of a load-locked operation so that we can 1203170Sstever@eecs.umich.edu // clear the execution context's lock flag if a matching store is 1213170Sstever@eecs.umich.edu // performed 1223170Sstever@eecs.umich.edu void trackLoadLocked(Request *req); 1233170Sstever@eecs.umich.edu 1243170Sstever@eecs.umich.edu // Compare a store address with any locked addresses so we can 1253170Sstever@eecs.umich.edu // clear the lock flag appropriately. Return value set to 'false' 1263170Sstever@eecs.umich.edu // if store operation should be suppressed (because it was a 1273170Sstever@eecs.umich.edu // conditional store and the address was no longer locked by the 1283170Sstever@eecs.umich.edu // requesting execution context), 'true' otherwise. Note that 1293170Sstever@eecs.umich.edu // this method must be called on *all* stores since even 1303170Sstever@eecs.umich.edu // non-conditional stores must clear any matching lock addresses. 1313170Sstever@eecs.umich.edu bool writeOK(Request *req) { 1323170Sstever@eecs.umich.edu if (lockedAddrList.empty()) { 1333170Sstever@eecs.umich.edu // no locked addrs: nothing to check, store_conditional fails 1343170Sstever@eecs.umich.edu bool isLocked = req->isLocked(); 1353170Sstever@eecs.umich.edu if (isLocked) { 1364040Ssaidi@eecs.umich.edu req->setExtraData(0); 1373170Sstever@eecs.umich.edu } 1383170Sstever@eecs.umich.edu return !isLocked; // only do write if not an sc 1393170Sstever@eecs.umich.edu } else { 1403170Sstever@eecs.umich.edu // iterate over list... 1413170Sstever@eecs.umich.edu return checkLockedAddrList(req); 1423170Sstever@eecs.umich.edu } 1433170Sstever@eecs.umich.edu } 1443170Sstever@eecs.umich.edu 1453012Ssaidi@eecs.umich.edu uint8_t *pmemAddr; 1463012Ssaidi@eecs.umich.edu int pagePtr; 1472565SN/A Tick lat; 1484467Sstever@eecs.umich.edu std::vector<MemoryPort*> ports; 1494467Sstever@eecs.umich.edu typedef std::vector<MemoryPort*>::iterator PortIterator; 1502391SN/A 1512391SN/A public: 1522391SN/A Addr new_page(); 1534762Snate@binkert.org uint64_t size() { return params()->range.size(); } 1544762Snate@binkert.org uint64_t start() { return params()->range.start; } 1552391SN/A 1562391SN/A public: 1574762Snate@binkert.org typedef PhysicalMemoryParams Params; 1584762Snate@binkert.org PhysicalMemory(const Params *p); 1592391SN/A virtual ~PhysicalMemory(); 1602391SN/A 1614762Snate@binkert.org const Params * 1624762Snate@binkert.org params() const 1634762Snate@binkert.org { 1644762Snate@binkert.org return dynamic_cast<const Params *>(_params); 1654762Snate@binkert.org } 1664762Snate@binkert.org 1672391SN/A public: 1682415SN/A int deviceBlockSize(); 1694475Sstever@eecs.umich.edu void getAddressRanges(AddrRangeList &resp, bool &snoop); 1702738Sstever@eecs.umich.edu virtual Port *getPort(const std::string &if_name, int idx = -1); 1712541SN/A void virtual init(); 1722914Ssaidi@eecs.umich.edu unsigned int drain(Event *de); 1732391SN/A 1743012Ssaidi@eecs.umich.edu protected: 1753349Sbinkertn@umich.edu void doFunctionalAccess(PacketPtr pkt); 1763349Sbinkertn@umich.edu virtual Tick calculateLatency(PacketPtr pkt); 1772413SN/A void recvStatusChange(Port::Status status); 1782391SN/A 1792391SN/A public: 1802391SN/A virtual void serialize(std::ostream &os); 1812391SN/A virtual void unserialize(Checkpoint *cp, const std::string §ion); 1822497SN/A 1832391SN/A}; 1842391SN/A 1852391SN/A#endif //__PHYSICAL_MEMORY_HH__ 186