diff options
Diffstat (limited to 'src/mem/bus.hh')
| -rw-r--r-- | src/mem/bus.hh | 167 |
1 files changed, 79 insertions, 88 deletions
diff --git a/src/mem/bus.hh b/src/mem/bus.hh index f0dc67b12..5dd98c07e 100644 --- a/src/mem/bus.hh +++ b/src/mem/bus.hh @@ -52,93 +52,6 @@ class Bus : public MemObject { - /** a globally unique id for this bus. */ - int busId; - /** the clock speed for the bus */ - int clock; - /** the width of the bus in bytes */ - int width; - /** the next tick at which the bus will be idle */ - Tick tickNextIdle; - - Event * drainEvent; - - - static const int defaultId = -3; //Make it unique from Broadcast - - struct DevMap { - int portId; - Range<Addr> range; - }; - range_map<Addr, int> portMap; - AddrRangeList defaultRange; - std::vector<DevMap> portSnoopList; - - /** Function called by the port when the bus is recieving a Timing - transaction.*/ - bool recvTiming(PacketPtr pkt); - - /** Function called by the port when the bus is recieving a Atomic - transaction.*/ - Tick recvAtomic(PacketPtr pkt); - - /** Function called by the port when the bus is recieving a Functional - transaction.*/ - void recvFunctional(PacketPtr pkt); - - /** Timing function called by port when it is once again able to process - * requests. */ - void recvRetry(int id); - - /** Function called by the port when the bus is recieving a status change.*/ - void recvStatusChange(Port::Status status, int id); - - /** Find which port connected to this bus (if any) should be given a packet - * with this address. - * @param addr Address to find port for. - * @param id Id of the port this packet was received from (to prevent - * loops) - * @return pointer to port that the packet should be sent out of. - */ - Port *findPort(Addr addr, int id); - - /** Find all ports with a matching snoop range, except src port. Keep in mind - * that the ranges shouldn't overlap or you will get a double snoop to the same - * interface.and the cache will assert out. - * @param addr Address to find snoop prts for. - * @param id Id of the src port of the request to avoid calling snoop on src - * @return vector of IDs to snoop on - */ - std::vector<int> findSnoopPorts(Addr addr, int id); - - /** Snoop all relevant ports atomicly. */ - Tick atomicSnoop(PacketPtr pkt, Port* responder); - - /** Snoop all relevant ports functionally. */ - void functionalSnoop(PacketPtr pkt, Port *responder); - - /** Call snoop on caches, be sure to set SNOOP_COMMIT bit if you want - * the snoop to happen - * @return True if succeds. - */ - bool timingSnoop(PacketPtr pkt, Port *responder); - - /** Process address range request. - * @param resp addresses that we can respond to - * @param snoop addresses that we would like to snoop - * @param id ide of the busport that made the request. - */ - void addressRanges(AddrRangeList &resp, AddrRangeList &snoop, int id); - - /** Occupy the bus with transmitting the packet pkt */ - void occupyBus(PacketPtr pkt); - - /** Ask everyone on the bus what their size is - * @param id id of the busport that made the request - * @return the max of all the sizes - */ - int findBlockSize(int id); - /** Declaration of the buses port type, one will be instantiated for each of the interfaces connecting to the bus. */ class BusPort : public Port @@ -198,7 +111,7 @@ class Bus : public MemObject // the 'owned' address ranges of all the other interfaces on // this bus... virtual void getDeviceAddressRanges(AddrRangeList &resp, - AddrRangeList &snoop) + bool &snoop) { bus->addressRanges(resp, snoop, id); } // Ask the bus to ask everyone on the bus what their block size is and @@ -219,6 +132,84 @@ class Bus : public MemObject const char *description(); }; + /** a globally unique id for this bus. */ + int busId; + /** the clock speed for the bus */ + int clock; + /** the width of the bus in bytes */ + int width; + /** the next tick at which the bus will be idle */ + Tick tickNextIdle; + + Event * drainEvent; + + + static const int defaultId = -3; //Make it unique from Broadcast + + typedef range_map<Addr,int>::iterator PortIter; + range_map<Addr, int> portMap; + + AddrRangeList defaultRange; + + typedef std::vector<BusPort*>::iterator SnoopIter; + std::vector<BusPort*> snoopPorts; + + /** Function called by the port when the bus is recieving a Timing + transaction.*/ + bool recvTiming(PacketPtr pkt); + + /** Function called by the port when the bus is recieving a Atomic + transaction.*/ + Tick recvAtomic(PacketPtr pkt); + + /** Function called by the port when the bus is recieving a Functional + transaction.*/ + void recvFunctional(PacketPtr pkt); + + /** Timing function called by port when it is once again able to process + * requests. */ + void recvRetry(int id); + + /** Function called by the port when the bus is recieving a status change.*/ + void recvStatusChange(Port::Status status, int id); + + /** Find which port connected to this bus (if any) should be given a packet + * with this address. + * @param addr Address to find port for. + * @param id Id of the port this packet was received from (to prevent + * loops) + * @return pointer to port that the packet should be sent out of. + */ + Port *findPort(Addr addr, int id); + + /** Snoop all relevant ports atomicly. */ + Tick atomicSnoop(PacketPtr pkt, Port* responder); + + /** Snoop all relevant ports functionally. */ + void functionalSnoop(PacketPtr pkt, Port *responder); + + /** Call snoop on caches, be sure to set SNOOP_COMMIT bit if you want + * the snoop to happen + * @return True if succeds. + */ + bool timingSnoop(PacketPtr pkt, Port *responder); + + /** Process address range request. + * @param resp addresses that we can respond to + * @param snoop addresses that we would like to snoop + * @param id ide of the busport that made the request. + */ + void addressRanges(AddrRangeList &resp, bool &snoop, int id); + + /** Occupy the bus with transmitting the packet pkt */ + void occupyBus(PacketPtr pkt); + + /** Ask everyone on the bus what their size is + * @param id id of the busport that made the request + * @return the max of all the sizes + */ + int findBlockSize(int id); + BusFreeEvent busIdle; bool inRetry; |