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-rw-r--r--src/mem/bus.cc37
1 files changed, 26 insertions, 11 deletions
diff --git a/src/mem/bus.cc b/src/mem/bus.cc
index 86a148f87..7ae41e11e 100644
--- a/src/mem/bus.cc
+++ b/src/mem/bus.cc
@@ -42,13 +42,14 @@
Port *
Bus::getPort(const std::string &if_name, int idx)
{
- if (if_name == "default")
+ if (if_name == "default") {
if (defaultPort == NULL) {
defaultPort = new BusPort(csprintf("%s-default",name()), this,
- defaultId);
+ defaultId);
return defaultPort;
} else
fatal("Default port already set\n");
+ }
// if_name ignored? forced to be empty?
int id = interfaces.size();
@@ -269,7 +270,16 @@ Bus::findPort(Addr addr, int id)
return defaultPort;
}
}
- panic("Unable to find destination for addr: %#llx", addr);
+
+ if (responderSet) {
+ panic("Unable to find destination for addr (user set default "
+ "responder): %#llx", addr);
+ } else {
+ DPRINTF(Bus, "Unable to find destination for addr: %#llx, will use "
+ "default port", addr);
+
+ return defaultPort;
+ }
}
@@ -392,12 +402,15 @@ Bus::recvStatusChange(Port::Status status, int id)
if (id == defaultId) {
defaultRange.clear();
- defaultPort->getPeerAddressRanges(ranges, snoops);
- assert(snoops.size() == 0);
- for(iter = ranges.begin(); iter != ranges.end(); iter++) {
- defaultRange.push_back(*iter);
- DPRINTF(BusAddrRanges, "Adding range %#llx - %#llx for default range\n",
- iter->start, iter->end);
+ // Only try to update these ranges if the user set a default responder.
+ if (responderSet) {
+ defaultPort->getPeerAddressRanges(ranges, snoops);
+ assert(snoops.size() == 0);
+ for(iter = ranges.begin(); iter != ranges.end(); iter++) {
+ defaultRange.push_back(*iter);
+ DPRINTF(BusAddrRanges, "Adding range %#llx - %#llx for default range\n",
+ iter->start, iter->end);
+ }
}
} else {
@@ -503,18 +516,20 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(Bus)
Param<int> bus_id;
Param<int> clock;
Param<int> width;
+ Param<bool> responder_set;
END_DECLARE_SIM_OBJECT_PARAMS(Bus)
BEGIN_INIT_SIM_OBJECT_PARAMS(Bus)
INIT_PARAM(bus_id, "a globally unique bus id"),
INIT_PARAM(clock, "bus clock speed"),
- INIT_PARAM(width, "width of the bus (bits)")
+ INIT_PARAM(width, "width of the bus (bits)"),
+ INIT_PARAM(responder_set, "Is a default responder set by the user")
END_INIT_SIM_OBJECT_PARAMS(Bus)
CREATE_SIM_OBJECT(Bus)
{
- return new Bus(getInstanceName(), bus_id, clock, width);
+ return new Bus(getInstanceName(), bus_id, clock, width, responder_set);
}
REGISTER_SIM_OBJECT("Bus", Bus)