Change getDeviceAddressRanges to use bool for snoop arg.

--HG--
extra : convert_revision : 832e52ba80cbab2f5bb6d5b5977a499d41b4d638

21 files changed, 188 insertions, 240 deletions

diff --git a/src/cpu/memtest/memtest.hh b/src/cpu/memtest/memtest.hh
index 264309fd7..123ee2a6c 100644
--- a/src/cpu/memtest/memtest.hh
+++ b/src/cpu/memtest/memtest.hh
@@ -115,8 +115,8 @@ class MemTest : public MemObject
         virtual void recvRetry();
 
         virtual void getDeviceAddressRanges(AddrRangeList &resp,
-            AddrRangeList &snoop)
-        { resp.clear(); snoop.clear(); snoop.push_back(RangeSize(0,0)); }
+                                            bool &snoop)
+        { resp.clear(); snoop = true; }
     };
 
     CpuPort cachePort;
diff --git a/src/cpu/o3/fetch.hh b/src/cpu/o3/fetch.hh
index 241935416..d9b0a47bd 100644
--- a/src/cpu/o3/fetch.hh
+++ b/src/cpu/o3/fetch.hh
@@ -100,8 +100,8 @@ class DefaultFetch
 
         /** Returns the address ranges of this device. */
         virtual void getDeviceAddressRanges(AddrRangeList &resp,
-                                            AddrRangeList &snoop)
-        { resp.clear(); snoop.clear(); snoop.push_back(RangeSize(0,0)); }
+                                            bool &snoop)
+        { resp.clear(); snoop = true; }
 
         /** Timing version of receive.  Handles setting fetch to the
          * proper status to start fetching. */
diff --git a/src/cpu/o3/lsq.hh b/src/cpu/o3/lsq.hh
index fd8f878a7..06de608e0 100644
--- a/src/cpu/o3/lsq.hh
+++ b/src/cpu/o3/lsq.hh
@@ -316,8 +316,8 @@ class LSQ {
 
         /** Returns the address ranges of this device. */
         virtual void getDeviceAddressRanges(AddrRangeList &resp,
-                                            AddrRangeList &snoop)
-        { resp.clear(); snoop.clear(); snoop.push_back(RangeSize(0,0)); }
+                                            bool &snoop)
+        { resp.clear(); snoop = true; }
 
         /** Timing version of receive.  Handles writing back and
          * completing the load or store that has returned from
diff --git a/src/cpu/ozone/front_end.hh b/src/cpu/ozone/front_end.hh
index 0acf99ead..667392c06 100644
--- a/src/cpu/ozone/front_end.hh
+++ b/src/cpu/ozone/front_end.hh
@@ -91,8 +91,8 @@ class FrontEnd
 
         /** Returns the address ranges of this device. */
         virtual void getDeviceAddressRanges(AddrRangeList &resp,
-                                            AddrRangeList &snoop)
-        { resp.clear(); snoop.clear(); snoop.push_back(RangeSize(0,0)); }
+                                            bool &snoop)
+        { resp.clear(); snoop = true; }
 
         /** Timing version of receive.  Handles setting fetch to the
          * proper status to start fetching. */
diff --git a/src/cpu/ozone/lw_lsq.hh b/src/cpu/ozone/lw_lsq.hh
index c981b8e63..2048ad6bb 100644
--- a/src/cpu/ozone/lw_lsq.hh
+++ b/src/cpu/ozone/lw_lsq.hh
@@ -257,8 +257,8 @@ class OzoneLWLSQ {
         virtual void recvStatusChange(Status status);
 
         virtual void getDeviceAddressRanges(AddrRangeList &resp,
-                                            AddrRangeList &snoop)
-        { resp.clear(); snoop.clear(); snoop.push_back(RangeSize(0,0)); }
+                                            bool &snoop)
+        { resp.clear(); snoop = true; }
 
         virtual bool recvTiming(PacketPtr pkt);
 
diff --git a/src/cpu/simple/atomic.hh b/src/cpu/simple/atomic.hh
index ad4aa4708..b127e3791 100644
--- a/src/cpu/simple/atomic.hh
+++ b/src/cpu/simple/atomic.hh
@@ -104,8 +104,8 @@ class AtomicSimpleCPU : public BaseSimpleCPU
         virtual void recvRetry();
 
         virtual void getDeviceAddressRanges(AddrRangeList &resp,
-            AddrRangeList &snoop)
-        { resp.clear(); snoop.clear(); snoop.push_back(RangeSize(0,0)); }
+            bool &snoop)
+        { resp.clear(); snoop = true; }
 
     };
     CpuPort icachePort;
diff --git a/src/cpu/simple/timing.hh b/src/cpu/simple/timing.hh
index e65cbe46b..39958bfb6 100644
--- a/src/cpu/simple/timing.hh
+++ b/src/cpu/simple/timing.hh
@@ -91,8 +91,8 @@ class TimingSimpleCPU : public BaseSimpleCPU
         virtual void recvStatusChange(Status status);
 
         virtual void getDeviceAddressRanges(AddrRangeList &resp,
-            AddrRangeList &snoop)
-        { resp.clear(); snoop.clear(); snoop.push_back(RangeSize(0,0)); }
+                                            bool &snoop)
+        { resp.clear(); snoop = false; }
 
         struct TickEvent : public Event
         {
diff --git a/src/dev/io_device.cc b/src/dev/io_device.cc
index 6528bd81c..ecbb391ef 100644
--- a/src/dev/io_device.cc
+++ b/src/dev/io_device.cc
@@ -48,9 +48,9 @@ PioPort::recvAtomic(PacketPtr pkt)
 }
 
 void
-PioPort::getDeviceAddressRanges(AddrRangeList &resp, AddrRangeList &snoop)
+PioPort::getDeviceAddressRanges(AddrRangeList &resp, bool &snoop)
 {
-    snoop.clear();
+    snoop = false;
     device->addressRanges(resp);
 }
 
diff --git a/src/dev/io_device.hh b/src/dev/io_device.hh
index bd150bfe4..25bd2de8d 100644
--- a/src/dev/io_device.hh
+++ b/src/dev/io_device.hh
@@ -59,7 +59,7 @@ class PioPort : public SimpleTimingPort
     virtual Tick recvAtomic(PacketPtr pkt);
 
     virtual void getDeviceAddressRanges(AddrRangeList &resp,
-                                        AddrRangeList &snoop);
+                                        bool &snoop);
 
   public:
 
@@ -127,8 +127,8 @@ class DmaPort : public Port
     virtual void recvRetry() ;
 
     virtual void getDeviceAddressRanges(AddrRangeList &resp,
-                                        AddrRangeList &snoop)
-    { resp.clear(); snoop.clear(); }
+                                        bool &snoop)
+    { resp.clear(); snoop = false; }
 
     void queueDma(PacketPtr pkt, bool front = false);
     void sendDma();
diff --git a/src/dev/pcidev.cc b/src/dev/pcidev.cc
index f906e69cf..c2a2bc02d 100644
--- a/src/dev/pcidev.cc
+++ b/src/dev/pcidev.cc
@@ -76,9 +76,9 @@ PciDev::PciConfigPort::recvAtomic(PacketPtr pkt)
 
 void
 PciDev::PciConfigPort::getDeviceAddressRanges(AddrRangeList &resp,
-                                              AddrRangeList &snoop)
+                                              bool &snoop)
 {
-    snoop.clear();
+    snoop = false;;
     resp.push_back(RangeSize(configAddr, PCI_CONFIG_SIZE+1));
 }
 
diff --git a/src/dev/pcidev.hh b/src/dev/pcidev.hh
index 5044e2932..5ddbe84a0 100644
--- a/src/dev/pcidev.hh
+++ b/src/dev/pcidev.hh
@@ -89,7 +89,7 @@ class PciDev : public DmaDevice
         virtual Tick recvAtomic(PacketPtr pkt);
 
         virtual void getDeviceAddressRanges(AddrRangeList &resp,
-                                            AddrRangeList &snoop);
+                                            bool &snoop);
 
         Platform *platform;
 
diff --git a/src/kern/tru64/tru64_events.cc b/src/kern/tru64/tru64_events.cc
index 0ad89f8bd..4db5df067 100644
--- a/src/kern/tru64/tru64_events.cc
+++ b/src/kern/tru64/tru64_events.cc
@@ -54,7 +54,7 @@ BadAddrEvent::process(ThreadContext *tc)
     uint64_t a0 = tc->readIntReg(ArgumentReg0);
 
     AddrRangeList resp;
-    AddrRangeList snoop;
+    bool snoop;
     AddrRangeIter iter;
     bool found = false;
 
diff --git a/src/mem/bridge.cc b/src/mem/bridge.cc
index 9509aea38..04b0308e1 100644
--- a/src/mem/bridge.cc
+++ b/src/mem/bridge.cc
@@ -367,7 +367,7 @@ Bridge::BridgePort::recvStatusChange(Port::Status status)
 
 void
 Bridge::BridgePort::getDeviceAddressRanges(AddrRangeList &resp,
-                                           AddrRangeList &snoop)
+                                           bool &snoop)
 {
     otherPort->getPeerAddressRanges(resp, snoop);
 }
diff --git a/src/mem/bridge.hh b/src/mem/bridge.hh
index a47fe3c1e..89d626611 100644
--- a/src/mem/bridge.hh
+++ b/src/mem/bridge.hh
@@ -182,7 +182,7 @@ class Bridge : public MemObject
         /** When receiving a address range request the peer port,
             pass it to the bridge. */
         virtual void getDeviceAddressRanges(AddrRangeList &resp,
-                                            AddrRangeList &snoop);
+                                            bool &snoop);
     };
 
     BridgePort portA, portB;
diff --git a/src/mem/bus.cc b/src/mem/bus.cc
index 95d4e2873..1f96115b8 100644
--- a/src/mem/bus.cc
+++ b/src/mem/bus.cc
@@ -296,16 +296,15 @@ Bus::findPort(Addr addr, int id)
 {
     /* An interval tree would be a better way to do this. --ali. */
     int dest_id = -1;
-    AddrRangeIter iter;
-    range_map<Addr,int>::iterator i;
 
-    i = portMap.find(RangeSize(addr,1));
+    PortIter i = portMap.find(RangeSize(addr,1));
     if (i != portMap.end())
         dest_id = i->second;
 
     // Check if this matches the default range
     if (dest_id == -1) {
-        for (iter = defaultRange.begin(); iter != defaultRange.end(); iter++) {
+        for (AddrRangeIter iter = defaultRange.begin();
+             iter != defaultRange.end(); iter++) {
             if (*iter == addr) {
                 DPRINTF(Bus, "  found addr %#llx on default\n", addr);
                 return defaultPort;
@@ -333,88 +332,63 @@ Bus::findPort(Addr addr, int id)
     return interfaces[dest_id];
 }
 
-std::vector<int>
-Bus::findSnoopPorts(Addr addr, int id)
-{
-    int i = 0;
-    AddrRangeIter iter;
-    std::vector<int> ports;
-
-    while (i < portSnoopList.size())
-    {
-        if (portSnoopList[i].range == addr && portSnoopList[i].portId != id) {
-            //Careful  to not overlap ranges
-            //or snoop will be called more than once on the port
-
-            //@todo Fix this hack because ranges are overlapping
-            //need to make sure we dont't create overlapping ranges
-            bool hack_overlap = false;
-            int size = ports.size();
-            for (int j=0; j < size; j++) {
-                if (ports[j] == portSnoopList[i].portId)
-                    hack_overlap = true;
-            }
-
-            if (!hack_overlap)
-                ports.push_back(portSnoopList[i].portId);
-//            DPRINTF(Bus, "  found snoop addr %#llx on device%d\n", addr,
-//                    portSnoopList[i].portId);
-        }
-        i++;
-    }
-    return ports;
-}
-
 Tick
 Bus::atomicSnoop(PacketPtr pkt, Port *responder)
 {
-    std::vector<int> ports = findSnoopPorts(pkt->getAddr(), pkt->getSrc());
     Tick response_time = 0;
 
-    while (!ports.empty())
-    {
-        if (interfaces[ports.back()] != responder) {
-            Tick response = interfaces[ports.back()]->sendAtomic(pkt);
+    for (SnoopIter s_iter = snoopPorts.begin();
+         s_iter != snoopPorts.end();
+         s_iter++) {
+        BusPort *p = *s_iter;
+        if (p != responder && p->getId() != pkt->getSrc()) {
+            Tick response = p->sendAtomic(pkt);
             if (response) {
                 assert(!response_time);  //Multiple responders
                 response_time = response;
             }
         }
-        ports.pop_back();
     }
+
     return response_time;
 }
 
 void
 Bus::functionalSnoop(PacketPtr pkt, Port *responder)
 {
-    std::vector<int> ports = findSnoopPorts(pkt->getAddr(), pkt->getSrc());
-
-    //The packet may be changed by another bus on snoops, restore the id after each
-    int id = pkt->getSrc();
-    while (!ports.empty() && pkt->result != Packet::Success)
-    {
-        if (interfaces[ports.back()] != responder)
-            interfaces[ports.back()]->sendFunctional(pkt);
-        ports.pop_back();
-        pkt->setSrc(id);
+    // The packet may be changed by another bus on snoops, restore the
+    // id after each
+    int src_id = pkt->getSrc();
+
+    for (SnoopIter s_iter = snoopPorts.begin();
+         s_iter != snoopPorts.end();
+         s_iter++) {
+        BusPort *p = *s_iter;
+        if (p != responder && p->getId() != src_id) {
+            p->sendFunctional(pkt);
+        }
+        if (pkt->result == Packet::Success) {
+            break;
+        }
+        pkt->setSrc(src_id);
     }
 }
 
 bool
 Bus::timingSnoop(PacketPtr pkt, Port* responder)
 {
-    std::vector<int> ports = findSnoopPorts(pkt->getAddr(), pkt->getSrc());
-    bool success = true;
-
-    while (!ports.empty() && success)
-    {
-        if (interfaces[ports.back()] != responder) //Don't call if responder also, once will do
-            success = interfaces[ports.back()]->sendTiming(pkt);
-        ports.pop_back();
+    for (SnoopIter s_iter = snoopPorts.begin();
+         s_iter != snoopPorts.end();
+         s_iter++) {
+        BusPort *p = *s_iter;
+        if (p != responder && p->getId() != pkt->getSrc()) {
+            bool success = p->sendTiming(pkt);
+            if (!success)
+                return false;
+        }
     }
 
-    return success;
+    return true;
 }
 
 
@@ -467,7 +441,7 @@ void
 Bus::recvStatusChange(Port::Status status, int id)
 {
     AddrRangeList ranges;
-    AddrRangeList snoops;
+    bool snoops;
     AddrRangeIter iter;
 
     assert(status == Port::RangeChange &&
@@ -480,7 +454,7 @@ Bus::recvStatusChange(Port::Status status, int id)
         // Only try to update these ranges if the user set a default responder.
         if (responderSet) {
             defaultPort->getPeerAddressRanges(ranges, snoops);
-            assert(snoops.size() == 0);
+            assert(snoops == false);
             for(iter = ranges.begin(); iter != ranges.end(); iter++) {
                 defaultRange.push_back(*iter);
                 DPRINTF(BusAddrRanges, "Adding range %#llx - %#llx for default range\n",
@@ -490,39 +464,33 @@ Bus::recvStatusChange(Port::Status status, int id)
     } else {
 
         assert((id < maxId && id >= 0) || id == defaultId);
-        Port *port = interfaces[id];
-        range_map<Addr,int>::iterator portIter;
-        std::vector<DevMap>::iterator snoopIter;
+        BusPort *port = interfaces[id];
 
         // Clean out any previously existent ids
-        for (portIter = portMap.begin(); portIter != portMap.end(); ) {
+        for (PortIter portIter = portMap.begin();
+             portIter != portMap.end(); ) {
             if (portIter->second == id)
                 portMap.erase(portIter++);
             else
                 portIter++;
         }
 
-        for (snoopIter = portSnoopList.begin(); snoopIter != portSnoopList.end(); ) {
-            if (snoopIter->portId == id)
-                snoopIter = portSnoopList.erase(snoopIter);
+        for (SnoopIter s_iter = snoopPorts.begin();
+             s_iter != snoopPorts.end(); ) {
+            if ((*s_iter)->getId() == id)
+                s_iter = snoopPorts.erase(s_iter);
             else
-                snoopIter++;
+                s_iter++;
         }
 
         port->getPeerAddressRanges(ranges, snoops);
 
-        for(iter = snoops.begin(); iter != snoops.end(); iter++) {
-            DevMap dm;
-            dm.portId = id;
-            dm.range = *iter;
-
-            //@todo, make sure we don't overlap ranges
-            DPRINTF(BusAddrRanges, "Adding snoop range %#llx - %#llx for id %d\n",
-                    dm.range.start, dm.range.end, id);
-            portSnoopList.push_back(dm);
+        if (snoops) {
+            DPRINTF(BusAddrRanges, "Adding id %d to snoop list\n", id);
+            snoopPorts.push_back(port);
         }
 
-        for(iter = ranges.begin(); iter != ranges.end(); iter++) {
+        for (iter = ranges.begin(); iter != ranges.end(); iter++) {
             DPRINTF(BusAddrRanges, "Adding range %#llx - %#llx for id %d\n",
                     iter->start, iter->end, id);
             if (portMap.insert(*iter, id) == portMap.end())
@@ -545,28 +513,24 @@ Bus::recvStatusChange(Port::Status status, int id)
 }
 
 void
-Bus::addressRanges(AddrRangeList &resp, AddrRangeList &snoop, int id)
+Bus::addressRanges(AddrRangeList &resp, bool &snoop, int id)
 {
-    std::vector<DevMap>::iterator snoopIter;
-    range_map<Addr,int>::iterator portIter;
-    AddrRangeIter dflt_iter;
-    bool subset;
-
     resp.clear();
-    snoop.clear();
+    snoop = false;
 
     DPRINTF(BusAddrRanges, "received address range request, returning:\n");
 
-    for (dflt_iter = defaultRange.begin(); dflt_iter != defaultRange.end();
-            dflt_iter++) {
+    for (AddrRangeIter dflt_iter = defaultRange.begin();
+         dflt_iter != defaultRange.end(); dflt_iter++) {
         resp.push_back(*dflt_iter);
         DPRINTF(BusAddrRanges, "  -- Dflt: %#llx : %#llx\n",dflt_iter->start,
                 dflt_iter->end);
     }
-    for (portIter = portMap.begin(); portIter != portMap.end(); portIter++) {
-        subset = false;
-        for (dflt_iter = defaultRange.begin(); dflt_iter != defaultRange.end();
-                dflt_iter++) {
+    for (PortIter portIter = portMap.begin();
+         portIter != portMap.end(); portIter++) {
+        bool subset = false;
+        for (AddrRangeIter dflt_iter = defaultRange.begin();
+             dflt_iter != defaultRange.end(); dflt_iter++) {
             if ((portIter->first.start < dflt_iter->start &&
                 portIter->first.end >= dflt_iter->start) ||
                (portIter->first.start < dflt_iter->end &&
@@ -587,15 +551,11 @@ Bus::addressRanges(AddrRangeList &resp, AddrRangeList &snoop, int id)
         }
     }
 
-    for (snoopIter = portSnoopList.begin();
-         snoopIter != portSnoopList.end(); snoopIter++)
-    {
-        if (snoopIter->portId != id) {
-            snoop.push_back(snoopIter->range);
-            DPRINTF(BusAddrRanges, "  -- Snoop: %#llx : %#llx\n",
-                    snoopIter->range.start, snoopIter->range.end);
-            //@todo We need to properly insert snoop ranges
-            //not overlapping the ranges (multiple)
+    for (SnoopIter s_iter = snoopPorts.begin(); s_iter != snoopPorts.end();
+         s_iter++) {
+        if ((*s_iter)->getId() != id) {
+            snoop = true;
+            break;
         }
     }
 }
@@ -606,17 +566,17 @@ Bus::findBlockSize(int id)
     if (cachedBlockSizeValid)
         return cachedBlockSize;
 
-    int max_bs = -1, tmp_bs;
-    range_map<Addr,int>::iterator portIter;
-    std::vector<DevMap>::iterator snoopIter;
-    for (portIter = portMap.begin(); portIter != portMap.end(); portIter++) {
-        tmp_bs = interfaces[portIter->second]->peerBlockSize();
+    int max_bs = -1;
+
+    for (PortIter portIter = portMap.begin();
+         portIter != portMap.end(); portIter++) {
+        int tmp_bs = interfaces[portIter->second]->peerBlockSize();
         if (tmp_bs > max_bs)
             max_bs = tmp_bs;
     }
-    for (snoopIter = portSnoopList.begin();
-         snoopIter != portSnoopList.end(); snoopIter++) {
-        tmp_bs = interfaces[snoopIter->portId]->peerBlockSize();
+    for (SnoopIter s_iter = snoopPorts.begin();
+         s_iter != snoopPorts.end(); s_iter++) {
+        int tmp_bs = (*s_iter)->peerBlockSize();
         if (tmp_bs > max_bs)
             max_bs = tmp_bs;
     }
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;
diff --git a/src/mem/cache/base_cache.cc b/src/mem/cache/base_cache.cc
index 3ed4b84d1..8aac02460 100644
--- a/src/mem/cache/base_cache.cc
+++ b/src/mem/cache/base_cache.cc
@@ -59,8 +59,7 @@ BaseCache::CachePort::recvStatusChange(Port::Status status)
 }
 
 void
-BaseCache::CachePort::getDeviceAddressRanges(AddrRangeList &resp,
-                                       AddrRangeList &snoop)
+BaseCache::CachePort::getDeviceAddressRanges(AddrRangeList &resp, bool &snoop)
 {
     cache->getAddressRanges(resp, snoop, isCpuSide);
 }
diff --git a/src/mem/cache/base_cache.hh b/src/mem/cache/base_cache.hh
index e45e36fa0..f06a79dc0 100644
--- a/src/mem/cache/base_cache.hh
+++ b/src/mem/cache/base_cache.hh
@@ -87,7 +87,7 @@ class BaseCache : public MemObject
         virtual void recvStatusChange(Status status);
 
         virtual void getDeviceAddressRanges(AddrRangeList &resp,
-                                            AddrRangeList &snoop);
+                                            bool &snoop);
 
         virtual int deviceBlockSize();
 
@@ -656,19 +656,18 @@ class BaseCache : public MemObject
      */
     void rangeChange() {}
 
-    void getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop, bool isCpuSide)
+    void getAddressRanges(AddrRangeList &resp, bool &snoop, bool isCpuSide)
     {
         if (isCpuSide)
         {
-            AddrRangeList dummy;
+            bool dummy;
             memSidePort->getPeerAddressRanges(resp, dummy);
         }
         else
         {
             //This is where snoops get updated
             AddrRangeList dummy;
-            cpuSidePort->getPeerAddressRanges(dummy, snoop);
-            return;
+            snoop = true;
         }
     }
 
diff --git a/src/mem/physical.cc b/src/mem/physical.cc
index 97c42509f..6621c36cf 100644
--- a/src/mem/physical.cc
+++ b/src/mem/physical.cc
@@ -385,18 +385,17 @@ PhysicalMemory::MemoryPort::recvStatusChange(Port::Status status)
 
 void
 PhysicalMemory::MemoryPort::getDeviceAddressRanges(AddrRangeList &resp,
-                                            AddrRangeList &snoop)
+                                                   bool &snoop)
 {
     memory->getAddressRanges(resp, snoop);
 }
 
 void
-PhysicalMemory::getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop)
+PhysicalMemory::getAddressRanges(AddrRangeList &resp, bool &snoop)
 {
-    snoop.clear();
+    snoop = false;
     resp.clear();
-    resp.push_back(RangeSize(start(),
-                             params()->addrRange.size()));
+    resp.push_back(RangeSize(start(), params()->addrRange.size()));
 }
 
 int
diff --git a/src/mem/physical.hh b/src/mem/physical.hh
index e3355d6aa..b9af5d334 100644
--- a/src/mem/physical.hh
+++ b/src/mem/physical.hh
@@ -64,7 +64,7 @@ class PhysicalMemory : public MemObject
         virtual void recvStatusChange(Status status);
 
         virtual void getDeviceAddressRanges(AddrRangeList &resp,
-                                            AddrRangeList &snoop);
+                                            bool &snoop);
 
         virtual int deviceBlockSize();
     };
@@ -169,7 +169,7 @@ class PhysicalMemory : public MemObject
 
   public:
     int deviceBlockSize();
-    void getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop);
+    void getAddressRanges(AddrRangeList &resp, bool &snoop);
     virtual Port *getPort(const std::string &if_name, int idx = -1);
     void virtual init();
     unsigned int drain(Event *de);
diff --git a/src/mem/port.hh b/src/mem/port.hh
index 877e00293..b23de6050 100644
--- a/src/mem/port.hh
+++ b/src/mem/port.hh
@@ -172,7 +172,7 @@ class Port
         @param snoop is a list of ranges snooped
     */
     virtual void getDeviceAddressRanges(AddrRangeList &resp,
-            AddrRangeList &snoop)
+                                        bool &snoop)
     { panic("??"); }
 
   public:
@@ -222,7 +222,7 @@ class Port
     /** Called by the associated device if it wishes to find out the address
         ranges connected to the peer ports devices.
     */
-    void getPeerAddressRanges(AddrRangeList &resp, AddrRangeList &snoop)
+    void getPeerAddressRanges(AddrRangeList &resp, bool &snoop)
     { peer->getDeviceAddressRanges(resp, snoop); }
 
     /** This function is a wrapper around sendFunctional()