diff options
Diffstat (limited to 'src/cpu/simple/atomic.cc')
| -rw-r--r-- | src/cpu/simple/atomic.cc | 105 |
1 files changed, 75 insertions, 30 deletions
diff --git a/src/cpu/simple/atomic.cc b/src/cpu/simple/atomic.cc index 3b3536e44..6f69b5ac4 100644 --- a/src/cpu/simple/atomic.cc +++ b/src/cpu/simple/atomic.cc @@ -31,6 +31,7 @@ #include "arch/locked_mem.hh" #include "arch/mmaped_ipr.hh" #include "arch/utility.hh" +#include "base/bigint.hh" #include "cpu/exetrace.hh" #include "cpu/simple/atomic.hh" #include "mem/packet.hh" @@ -125,6 +126,17 @@ AtomicSimpleCPU::CpuPort::recvRetry() panic("AtomicSimpleCPU doesn't expect recvRetry callback!"); } +void +AtomicSimpleCPU::DcachePort::setPeer(Port *port) +{ + Port::setPeer(port); + +#if FULL_SYSTEM + // Update the ThreadContext's memory ports (Functional/Virtual + // Ports) + cpu->tcBase()->connectMemPorts(); +#endif +} AtomicSimpleCPU::AtomicSimpleCPU(Params *p) : BaseSimpleCPU(p), tickEvent(this), @@ -138,18 +150,20 @@ AtomicSimpleCPU::AtomicSimpleCPU(Params *p) ifetch_req = new Request(); ifetch_req->setThreadContext(p->cpu_id, 0); // Add thread ID if we add MT - ifetch_pkt = new Packet(ifetch_req, Packet::ReadReq, Packet::Broadcast); + ifetch_pkt = new Packet(ifetch_req, MemCmd::ReadReq, Packet::Broadcast); ifetch_pkt->dataStatic(&inst); data_read_req = new Request(); data_read_req->setThreadContext(p->cpu_id, 0); // Add thread ID here too - data_read_pkt = new Packet(data_read_req, Packet::ReadReq, + data_read_pkt = new Packet(data_read_req, MemCmd::ReadReq, Packet::Broadcast); data_read_pkt->dataStatic(&dataReg); data_write_req = new Request(); data_write_req->setThreadContext(p->cpu_id, 0); // Add thread ID here too - data_write_pkt = new Packet(data_write_req, Packet::WriteReq, + data_write_pkt = new Packet(data_write_req, MemCmd::WriteReq, + Packet::Broadcast); + data_swap_pkt = new Packet(data_write_req, MemCmd::SwapReq, Packet::Broadcast); } @@ -208,7 +222,7 @@ AtomicSimpleCPU::switchOut() void AtomicSimpleCPU::takeOverFrom(BaseCPU *oldCPU) { - BaseCPU::takeOverFrom(oldCPU); + BaseCPU::takeOverFrom(oldCPU, &icachePort, &dcachePort); assert(!tickEvent.scheduled()); @@ -239,12 +253,6 @@ AtomicSimpleCPU::activateContext(int thread_num, int delay) notIdleFraction++; -#if FULL_SYSTEM - // Connect the ThreadContext's memory ports (Functional/Virtual - // Ports) - tc->connectMemPorts(); -#endif - //Make sure ticks are still on multiples of cycles tickEvent.schedule(nextCycle(curTick + cycles(delay))); _status = Running; @@ -318,6 +326,14 @@ AtomicSimpleCPU::read(Addr addr, T &data, unsigned flags) template Fault +AtomicSimpleCPU::read(Addr addr, Twin32_t &data, unsigned flags); + +template +Fault +AtomicSimpleCPU::read(Addr addr, Twin64_t &data, unsigned flags); + +template +Fault AtomicSimpleCPU::read(Addr addr, uint64_t &data, unsigned flags); template @@ -363,10 +379,15 @@ AtomicSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res) { // use the CPU's statically allocated write request and packet objects Request *req = data_write_req; - PacketPtr pkt = data_write_pkt; + PacketPtr pkt; req->setVirt(0, addr, sizeof(T), flags, thread->readPC()); + if (req->isSwap()) + pkt = data_swap_pkt; + else + pkt = data_write_pkt; + if (traceData) { traceData->setAddr(addr); } @@ -381,6 +402,11 @@ AtomicSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res) if (req->isLocked()) { do_access = TheISA::handleLockedWrite(thread, req); } + if (req->isCondSwap()) { + assert(res); + req->setExtraData(*res); + } + if (do_access) { pkt->reinitFromRequest(); @@ -401,15 +427,11 @@ AtomicSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res) #endif } - if (req->isLocked()) { - uint64_t scResult = req->getScResult(); - if (scResult != 0) { - // clear failure counter - thread->setStCondFailures(0); - } - if (res) { - *res = req->getScResult(); - } + if (req->isSwap()) { + assert(res); + *res = pkt->get<T>(); + } else if (res) { + *res = req->getExtraData(); } } @@ -424,6 +446,17 @@ AtomicSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res) #ifndef DOXYGEN_SHOULD_SKIP_THIS + +template +Fault +AtomicSimpleCPU::write(Twin32_t data, Addr addr, + unsigned flags, uint64_t *res); + +template +Fault +AtomicSimpleCPU::write(Twin64_t data, Addr addr, + unsigned flags, uint64_t *res); + template Fault AtomicSimpleCPU::write(uint64_t data, Addr addr, @@ -483,17 +516,28 @@ AtomicSimpleCPU::tick() Fault fault = setupFetchRequest(ifetch_req); if (fault == NoFault) { - ifetch_pkt->reinitFromRequest(); + Tick icache_latency = 0; + bool icache_access = false; + dcache_access = false; // assume no dcache access - Tick icache_latency = icachePort.sendAtomic(ifetch_pkt); - // ifetch_req is initialized to read the instruction directly - // into the CPU object's inst field. + //Fetch more instruction memory if necessary + if(predecoder.needMoreBytes()) + { + icache_access = true; + ifetch_pkt->reinitFromRequest(); + + icache_latency = icachePort.sendAtomic(ifetch_pkt); + // ifetch_req is initialized to read the instruction directly + // into the CPU object's inst field. + } - dcache_access = false; // assume no dcache access preExecute(); - fault = curStaticInst->execute(this, traceData); - postExecute(); + if(curStaticInst) + { + fault = curStaticInst->execute(this, traceData); + postExecute(); + } // @todo remove me after debugging with legion done if (curStaticInst && (!curStaticInst->isMicroOp() || @@ -501,7 +545,8 @@ AtomicSimpleCPU::tick() instCnt++; if (simulate_stalls) { - Tick icache_stall = icache_latency - cycles(1); + Tick icache_stall = + icache_access ? icache_latency - cycles(1) : 0; Tick dcache_stall = dcache_access ? dcache_latency - cycles(1) : 0; Tick stall_cycles = (icache_stall + dcache_stall) / cycles(1); @@ -512,8 +557,8 @@ AtomicSimpleCPU::tick() } } - - advancePC(fault); + if(predecoder.needMoreBytes()) + advancePC(fault); } if (_status != Idle) |