diff options
Diffstat (limited to 'src/mem/bus.cc')
-rw-r--r-- | src/mem/bus.cc | 54 |
1 files changed, 43 insertions, 11 deletions
diff --git a/src/mem/bus.cc b/src/mem/bus.cc index 86a148f87..7b65d252b 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(); @@ -240,6 +241,9 @@ Bus::recvRetry(int id) } } } + //If we weren't able to drain before, we might be able to now. + if (drainEvent && retryList.size() == 0 && curTick >= tickNextIdle) + drainEvent->process(); } Port * @@ -269,7 +273,16 @@ 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 +405,15 @@ 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 { @@ -498,23 +514,39 @@ Bus::addressRanges(AddrRangeList &resp, AddrRangeList &snoop, int id) } } +unsigned int +Bus::drain(Event * de) +{ + //We should check that we're not "doing" anything, and that noone is + //waiting. We might be idle but have someone waiting if the device we + //contacted for a retry didn't actually retry. + if (curTick >= tickNextIdle && retryList.size() == 0) { + return 0; + } else { + drainEvent = de; + return 1; + } +} + 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) |