diff options
Diffstat (limited to 'src/cpu/simple/timing.cc')
-rw-r--r-- | src/cpu/simple/timing.cc | 71 |
1 files changed, 42 insertions, 29 deletions
diff --git a/src/cpu/simple/timing.cc b/src/cpu/simple/timing.cc index ad5c0e5d6..97df0e5d5 100644 --- a/src/cpu/simple/timing.cc +++ b/src/cpu/simple/timing.cc @@ -32,7 +32,8 @@ #include "arch/utility.hh" #include "cpu/exetrace.hh" #include "cpu/simple/timing.hh" -#include "mem/packet_impl.hh" +#include "mem/packet.hh" +#include "mem/packet_access.hh" #include "sim/builder.hh" #include "sim/system.hh" @@ -65,14 +66,14 @@ TimingSimpleCPU::init() } Tick -TimingSimpleCPU::CpuPort::recvAtomic(Packet *pkt) +TimingSimpleCPU::CpuPort::recvAtomic(PacketPtr pkt) { panic("TimingSimpleCPU doesn't expect recvAtomic callback!"); return curTick; } void -TimingSimpleCPU::CpuPort::recvFunctional(Packet *pkt) +TimingSimpleCPU::CpuPort::recvFunctional(PacketPtr pkt) { //No internal storage to update, jusst return return; @@ -89,7 +90,7 @@ TimingSimpleCPU::CpuPort::recvStatusChange(Status status) void -TimingSimpleCPU::CpuPort::TickEvent::schedule(Packet *_pkt, Tick t) +TimingSimpleCPU::CpuPort::TickEvent::schedule(PacketPtr _pkt, Tick t) { pkt = _pkt; Event::schedule(t); @@ -268,7 +269,7 @@ TimingSimpleCPU::read(Addr addr, T &data, unsigned flags) // Now do the access. if (fault == NoFault) { - Packet *pkt = + PacketPtr pkt = new Packet(req, Packet::ReadReq, Packet::Broadcast); pkt->dataDynamic<T>(new T); @@ -470,7 +471,7 @@ TimingSimpleCPU::advanceInst(Fault fault) void -TimingSimpleCPU::completeIfetch(Packet *pkt) +TimingSimpleCPU::completeIfetch(PacketPtr pkt) { // received a response from the icache: execute the received // instruction @@ -526,19 +527,25 @@ TimingSimpleCPU::IcachePort::ITickEvent::process() } bool -TimingSimpleCPU::IcachePort::recvTiming(Packet *pkt) +TimingSimpleCPU::IcachePort::recvTiming(PacketPtr pkt) { - // delay processing of returned data until next CPU clock edge - Tick time = pkt->req->getTime(); - while (time < curTick) - time += lat; + if (pkt->isResponse()) { + // delay processing of returned data until next CPU clock edge + Tick time = pkt->req->getTime(); + while (time < curTick) + time += lat; - if (time == curTick) - cpu->completeIfetch(pkt); - else - tickEvent.schedule(pkt, time); + if (time == curTick) + cpu->completeIfetch(pkt); + else + tickEvent.schedule(pkt, time); - return true; + return true; + } + else { + //Snooping a Coherence Request, do nothing + return true; + } } void @@ -548,7 +555,7 @@ TimingSimpleCPU::IcachePort::recvRetry() // waiting to transmit assert(cpu->ifetch_pkt != NULL); assert(cpu->_status == IcacheRetry); - Packet *tmp = cpu->ifetch_pkt; + PacketPtr tmp = cpu->ifetch_pkt; if (sendTiming(tmp)) { cpu->_status = IcacheWaitResponse; cpu->ifetch_pkt = NULL; @@ -556,7 +563,7 @@ TimingSimpleCPU::IcachePort::recvRetry() } void -TimingSimpleCPU::completeDataAccess(Packet *pkt) +TimingSimpleCPU::completeDataAccess(PacketPtr pkt) { // received a response from the dcache: complete the load or store // instruction @@ -598,19 +605,25 @@ TimingSimpleCPU::completeDrain() } bool -TimingSimpleCPU::DcachePort::recvTiming(Packet *pkt) +TimingSimpleCPU::DcachePort::recvTiming(PacketPtr pkt) { - // delay processing of returned data until next CPU clock edge - Tick time = pkt->req->getTime(); - while (time < curTick) - time += lat; + if (pkt->isResponse()) { + // delay processing of returned data until next CPU clock edge + Tick time = pkt->req->getTime(); + while (time < curTick) + time += lat; - if (time == curTick) - cpu->completeDataAccess(pkt); - else - tickEvent.schedule(pkt, time); + if (time == curTick) + cpu->completeDataAccess(pkt); + else + tickEvent.schedule(pkt, time); - return true; + return true; + } + else { + //Snooping a coherence req, do nothing + return true; + } } void @@ -626,7 +639,7 @@ TimingSimpleCPU::DcachePort::recvRetry() // waiting to transmit assert(cpu->dcache_pkt != NULL); assert(cpu->_status == DcacheRetry); - Packet *tmp = cpu->dcache_pkt; + PacketPtr tmp = cpu->dcache_pkt; if (sendTiming(tmp)) { cpu->_status = DcacheWaitResponse; // memory system takes ownership of packet |