From: Steve Reinhardt Date: Wed, 31 May 2006 04:12:29 +0000 (-0400) Subject: Streamline interface to Request object. X-Git-Tag: m5_2.0_beta1~36^2~113 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d77d39daee5c3ba8483d58911a1d5b12c4707040;p=gem5.git Streamline interface to Request object. src/SConscript: mem/request.cc no longer needed (all functions inline). src/cpu/simple/atomic.cc: src/cpu/simple/base.cc: src/cpu/simple/timing.cc: src/dev/io_device.cc: src/mem/port.cc: Modified Request object interface. src/mem/packet.hh: Modified Request object interface. Address & size are always set together now, so track with single flag. src/mem/request.hh: Streamline interface to support a handful of calls that set multiple fields reflecting common usage patterns. Reduce number of validFoo booleans by combining flags for fields which must be set together. --HG-- extra : convert_revision : 3b499de90d6d5f12f0cc7a9a788663265677fe10 --- diff --git a/src/SConscript b/src/SConscript index 097acfe13..78db4e453 100644 --- a/src/SConscript +++ b/src/SConscript @@ -95,7 +95,6 @@ base_sources = Split(''' mem/packet.cc mem/physical.cc mem/port.cc - mem/request.cc sim/builder.cc sim/configfile.cc diff --git a/src/cpu/simple/atomic.cc b/src/cpu/simple/atomic.cc index c2e6f6185..99b022c07 100644 --- a/src/cpu/simple/atomic.cc +++ b/src/cpu/simple/atomic.cc @@ -120,26 +120,17 @@ AtomicSimpleCPU::AtomicSimpleCPU(Params *p) { _status = Idle; - ifetch_req = new Request(true); - ifetch_req->setAsid(0); - // @todo fix me and get the real cpu iD!!! - ifetch_req->setCpuNum(0); - ifetch_req->setSize(sizeof(MachInst)); + // @todo fix me and get the real cpu id & thread number!!! + ifetch_req = new Request(); ifetch_pkt = new Packet(ifetch_req, Packet::ReadReq, Packet::Broadcast); ifetch_pkt->dataStatic(&inst); - data_read_req = new Request(true); - // @todo fix me and get the real cpu iD!!! - data_read_req->setCpuNum(0); - data_read_req->setAsid(0); + data_read_req = new Request(); data_read_pkt = new Packet(data_read_req, Packet::ReadReq, Packet::Broadcast); data_read_pkt->dataStatic(&dataReg); - data_write_req = new Request(true); - // @todo fix me and get the real cpu iD!!! - data_write_req->setCpuNum(0); - data_write_req->setAsid(0); + data_write_req = new Request(); data_write_pkt = new Packet(data_write_req, Packet::WriteReq, Packet::Broadcast); } @@ -236,10 +227,7 @@ template Fault AtomicSimpleCPU::read(Addr addr, T &data, unsigned flags) { - data_read_req->setVaddr(addr); - data_read_req->setSize(sizeof(T)); - data_read_req->setFlags(flags); - data_read_req->setTime(curTick); + data_read_req->setVirt(0, addr, sizeof(T), flags, cpuXC->readPC()); if (traceData) { traceData->setAddr(addr); @@ -314,10 +302,7 @@ template Fault AtomicSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res) { - data_write_req->setVaddr(addr); - data_write_req->setTime(curTick); - data_write_req->setSize(sizeof(T)); - data_write_req->setFlags(flags); + data_write_req->setVirt(0, addr, sizeof(T), flags, cpuXC->readPC()); if (traceData) { traceData->setAddr(addr); @@ -408,7 +393,6 @@ AtomicSimpleCPU::tick() checkForInterrupts(); - ifetch_req->resetMin(); Fault fault = setupFetchRequest(ifetch_req); if (fault == NoFault) { diff --git a/src/cpu/simple/base.cc b/src/cpu/simple/base.cc index 2e9b4b81f..2e979870c 100644 --- a/src/cpu/simple/base.cc +++ b/src/cpu/simple/base.cc @@ -357,13 +357,9 @@ BaseSimpleCPU::setupFetchRequest(Request *req) DPRINTF(Fetch,"Fetch: PC:%08p NPC:%08p NNPC:%08p\n",cpuXC->readPC(), cpuXC->readNextPC(),cpuXC->readNextNPC()); - req->setVaddr(cpuXC->readPC() & ~3); - req->setTime(curTick); -#if FULL_SYSTEM - req->setFlags((cpuXC->readPC() & 1) ? PHYSICAL : 0); -#else - req->setFlags(0); -#endif + req->setVirt(0, cpuXC->readPC() & ~3, sizeof(MachInst), + (FULL_SYSTEM && (cpuXC->readPC() & 1)) ? PHYSICAL : 0, + cpuXC->readPC()); Fault fault = cpuXC->translateInstReq(req); diff --git a/src/cpu/simple/timing.cc b/src/cpu/simple/timing.cc index ed0c2da94..9cccb97f7 100644 --- a/src/cpu/simple/timing.cc +++ b/src/cpu/simple/timing.cc @@ -172,12 +172,10 @@ template Fault TimingSimpleCPU::read(Addr addr, T &data, unsigned flags) { - Request *data_read_req = new Request(true); + // need to fill in CPU & thread IDs here + Request *data_read_req = new Request(); - data_read_req->setVaddr(addr); - data_read_req->setSize(sizeof(T)); - data_read_req->setFlags(flags); - data_read_req->setTime(curTick); + data_read_req->setVirt(0, addr, sizeof(T), flags, cpuXC->readPC()); if (traceData) { traceData->setAddr(data_read_req->getVaddr()); @@ -255,11 +253,9 @@ template Fault TimingSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res) { - Request *data_write_req = new Request(true); - data_write_req->setVaddr(addr); - data_write_req->setTime(curTick); - data_write_req->setSize(sizeof(T)); - data_write_req->setFlags(flags); + // need to fill in CPU & thread IDs here + Request *data_write_req = new Request(); + data_write_req->setVirt(0, addr, sizeof(T), flags, cpuXC->readPC()); // translate to physical address Fault fault = cpuXC->translateDataWriteReq(data_write_req); @@ -340,8 +336,8 @@ TimingSimpleCPU::fetch() { checkForInterrupts(); - Request *ifetch_req = new Request(true); - ifetch_req->setSize(sizeof(MachInst)); + // need to fill in CPU & thread IDs here + Request *ifetch_req = new Request(); Fault fault = setupFetchRequest(ifetch_req); ifetch_pkt = new Packet(ifetch_req, Packet::ReadReq, Packet::Broadcast); diff --git a/src/dev/io_device.cc b/src/dev/io_device.cc index 0a8379095..c644308b6 100644 --- a/src/dev/io_device.cc +++ b/src/dev/io_device.cc @@ -166,15 +166,12 @@ DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, for (ChunkGenerator gen(addr, size, peerBlockSize()); !gen.done(); gen.next()) { - Request *req = new Request(false); - req->setPaddr(gen.addr()); - req->setSize(gen.size()); - req->setTime(curTick); + Request *req = new Request(gen.addr(), gen.size(), 0); Packet *pkt = new Packet(req, cmd, Packet::Broadcast); // Increment the data pointer on a write if (data) - pkt->dataStatic(data + prevSize) ; + pkt->dataStatic(data + prevSize); prevSize += gen.size(); diff --git a/src/mem/packet.hh b/src/mem/packet.hh index e09ef4b85..4bcc05abd 100644 --- a/src/mem/packet.hh +++ b/src/mem/packet.hh @@ -91,10 +91,8 @@ class Packet * (unlike * addr, size, and src). */ short dest; - /** Is the 'addr' field valid? */ - bool addrValid; - /** Is the 'size' field valid? */ - bool sizeValid; + /** Are the 'addr' and 'size' fields valid? */ + bool addrSizeValid; /** Is the 'src' field valid? */ bool srcValid; @@ -192,11 +190,8 @@ class Packet short getDest() const { return dest; } void setDest(short _dest) { dest = _dest; } - Addr getAddr() const { assert(addrValid); return addr; } - void setAddr(Addr _addr) { addr = _addr; addrValid = true; } - - int getSize() const { assert(sizeValid); return size; } - void setSize(int _size) { size = _size; sizeValid = true; } + Addr getAddr() const { assert(addrSizeValid); return addr; } + int getSize() const { assert(addrSizeValid); return size; } /** Constructor. Note that a Request object must be constructed * first, but the Requests's physical address and size fields @@ -205,7 +200,7 @@ class Packet Packet(Request *_req, Command _cmd, short _dest) : data(NULL), staticData(false), dynamicData(false), arrayData(false), addr(_req->paddr), size(_req->size), dest(_dest), - addrValid(_req->validPaddr), sizeValid(_req->validSize), + addrSizeValid(_req->validPaddr), srcValid(false), req(_req), coherence(NULL), senderState(NULL), cmd(_cmd), result(Unknown) @@ -223,9 +218,9 @@ class Packet * multiple transactions. */ void reinitFromRequest() { assert(req->validPaddr); - setAddr(req->paddr); - assert(req->validSize); - setSize(req->size); + addr = req->paddr; + size = req->size; + addrSizeValid = true; result = Unknown; if (dynamicData) { deleteData(); diff --git a/src/mem/port.cc b/src/mem/port.cc index 651cb739a..e216ffe71 100644 --- a/src/mem/port.cc +++ b/src/mem/port.cc @@ -45,13 +45,12 @@ Port::setPeer(Port *port) void Port::blobHelper(Addr addr, uint8_t *p, int size, Packet::Command cmd) { - Request req(false); + Request req; Packet pkt(&req, cmd, Packet::Broadcast); for (ChunkGenerator gen(addr, size, peerBlockSize()); !gen.done(); gen.next()) { - req.setPaddr(gen.addr()); - req.setSize(gen.size()); + req.setPhys(gen.addr(), gen.size(), 0); pkt.reinitFromRequest(); pkt.dataStatic(p); sendFunctional(&pkt); diff --git a/src/mem/request.hh b/src/mem/request.hh index 10550e859..c69b36c40 100644 --- a/src/mem/request.hh +++ b/src/mem/request.hh @@ -61,139 +61,155 @@ const unsigned NO_ALIGN_FAULT = 0x400; class Request { - //@todo Make Accesor functions, make these private. - public: - /** Constructor, needs a bool to signify if it is/isn't Cpu Request. */ - Request(bool isCpu); - - /** reset the request to it's initial state so it can be reused.*/ - void resetAll(bool isCpu); - - /** reset the request's addrs times, etc, so but not everything to same - * time. */ - void resetMin(); - -//First non-cpu request fields private: - /** The physical address of the request. */ + /** + * The physical address of the request. Valid only if validPaddr + * is set. */ Addr paddr; - /** Wether or not paddr is valid (has been written yet). */ - bool validPaddr; - /** The size of the request. */ + /** + * The size of the request. This field must be set when vaddr or + * paddr is written via setVirt() or setPhys(), so it is always + * valid as long as one of the address fields is valid. */ int size; - /** Wether or not size is valid (has been written yet). */ - bool validSize; - - /** The time this request was started. Used to calculate latencies. */ - Tick time; - /** Wether or not time is valid (has been written yet). */ - bool validTime; - - /** Destination address if this is a block copy. */ - Addr copyDest; - /** Wether or not copyDest is valid (has been written yet). */ - bool validCopyDest; /** Flag structure for the request. */ uint32_t flags; -//Accsesors for non-cpu request fields - public: - /** Accesor for paddr. */ - Addr getPaddr(); - /** Accesor for paddr. */ - void setPaddr(Addr _paddr); - - /** Accesor for size. */ - int getSize(); - /** Accesor for size. */ - void setSize(int _size); - - /** Accesor for time. */ - Tick getTime(); - /** Accesor for time. */ - void setTime(Tick _time); - - /** Accesor for copy dest. */ - Addr getCopyDest(); - /** Accesor for copy dest. */ - void setCopyDest(Addr _copyDest); - - /** Accesor for flags. */ - uint32_t getFlags(); - /** Accesor for paddr. */ - void setFlags(uint32_t _flags); - -//Now cpu-request fields - private: - /** Bool to signify if this is a cpuRequest. */ - bool cpuReq; - - /** The virtual address of the request. */ - Addr vaddr; - /** Wether or not the vaddr is valid. */ - bool validVaddr; + /** + * The time this request was started. Used to calculate + * latencies. This field is set to curTick any time paddr or vaddr + * is written. */ + Tick time; /** The address space ID. */ int asid; - /** Wether or not the asid is valid. */ - bool validAsid; + /** The virtual address of the request. */ + Addr vaddr; /** The return value of store conditional. */ uint64_t scResult; - /** Wether or not the sc result is valid. */ - bool validScResult; - /** The cpu number for statistics. */ + /** The cpu number (for statistics, typically). */ int cpuNum; - /** Wether or not the cpu number is valid. */ - bool validCpuNum; - - /** The requesting thread id. */ + /** The requesting thread id (for statistics, typically). */ int threadNum; - /** Wether or not the thread id is valid. */ - bool validThreadNum; /** program counter of initiating access; for tracing/debugging */ Addr pc; - /** Wether or not the pc is valid. */ + + /** Whether or not paddr is valid (has been written yet). */ + bool validPaddr; + /** Whether or not the asid & vaddr are valid. */ + bool validAsidVaddr; + /** Whether or not the sc result is valid. */ + bool validScResult; + /** Whether or not the cpu number & thread ID are valid. */ + bool validCpuAndThreadNums; + /** Whether or not the pc is valid. */ bool validPC; -//Accessor Functions for cpu request fields public: - /** Accesor function to determine if this is a cpu request or not.*/ - bool isCpuRequest(); - - /** Accesor function for vaddr.*/ - Addr getVaddr(); - /** Accesor function for vaddr.*/ - void setVaddr(Addr _vaddr); - - /** Accesor function for asid.*/ - int getAsid(); - /** Accesor function for asid.*/ - void setAsid(int _asid); - - /** Accesor function for store conditional return value.*/ - uint64_t getScResult(); - /** Accesor function for store conditional return value.*/ - void setScResult(uint64_t _scResult); - - /** Accesor function for cpu number.*/ - int getCpuNum(); - /** Accesor function for cpu number.*/ - void setCpuNum(int _cpuNum); - - /** Accesor function for thread number.*/ - int getThreadNum(); - /** Accesor function for thread number.*/ - void setThreadNum(int _threadNum); - - /** Accesor function for pc.*/ - Addr getPC(); - /** Accesor function for pc.*/ - void setPC(Addr _pc); + /** Minimal constructor. No fields are initialized. */ + Request() + : validPaddr(false), validAsidVaddr(false), + validScResult(false), validCpuAndThreadNums(false), validPC(false) + {} + + /** + * Constructor for physical (e.g. device) requests. Initializes + * just physical address, size, flags, and timestamp (to curTick). + * These fields are adequate to perform a request. */ + Request(Addr _paddr, int _size, int _flags) + : validCpuAndThreadNums(false) + { setPhys(_paddr, _size, _flags); } + + /** + * Set up CPU and thread numbers. */ + void setThreadContext(int _cpuNum, int _threadNum) + { + cpuNum = _cpuNum; + threadNum = _threadNum; + validCpuAndThreadNums = true; + } + + /** + * Set up a physical (e.g. device) request in a previously + * allocated Request object. */ + void setPhys(Addr _paddr, int _size, int _flags) + { + paddr = _paddr; + size = _size; + flags = _flags; + time = curTick; + validPaddr = true; + validAsidVaddr = false; + validPC = false; + validScResult = false; + } + + /** + * Set up a virtual (e.g., CPU) request in a previously + * allocated Request object. */ + void setVirt(int _asid, Addr _vaddr, int _size, int _flags, Addr _pc) + { + asid = _asid; + vaddr = _vaddr; + size = _size; + flags = _flags; + pc = _pc; + time = curTick; + validPaddr = false; + validAsidVaddr = true; + validPC = true; + validScResult = false; + } + + /** Set just the physical address. This should only be used to + * record the result of a translation, and thus the vaddr must be + * valid before this method is called. Otherwise, use setPhys() + * to guarantee that the size and flags are also set. + */ + void setPaddr(Addr _paddr) + { + assert(validAsidVaddr); + paddr = _paddr; + validPaddr = true; + } + + /** Accessor for paddr. */ + Addr getPaddr() { assert(validPaddr); return paddr; } + + /** Accessor for size. */ + int getSize() { assert(validPaddr || validAsidVaddr); return size; } + /** Accessor for time. */ + Tick getTime() { assert(validPaddr || validAsidVaddr); return time; } + + /** Accessor for flags. */ + uint32_t getFlags() { assert(validPaddr || validAsidVaddr); return flags; } + /** Accessor for paddr. */ + void setFlags(uint32_t _flags) + { assert(validPaddr || validAsidVaddr); flags = _flags; } + + /** Accessor function for vaddr.*/ + Addr getVaddr() { assert(validAsidVaddr); return vaddr; } + + /** Accessor function for asid.*/ + int getAsid() { assert(validAsidVaddr); return asid; } + + /** Accessor function for store conditional return value.*/ + uint64_t getScResult() { assert(validScResult); return scResult; } + /** Accessor function for store conditional return value.*/ + void setScResult(uint64_t _scResult) + { scResult = _scResult; validScResult = true; } + + /** Accessor function for cpu number.*/ + int getCpuNum() { assert(validCpuAndThreadNums); return cpuNum; } + /** Accessor function for thread number.*/ + int getThreadNum() { assert(validCpuAndThreadNums); return threadNum; } + + /** Accessor function for pc.*/ + Addr getPC() { assert(validPC); return pc; } friend class Packet; };