The only issue I have ever had with using functional memory requests
during timing mode is that some modules explicitly disable them. There
is no intrinsic reason (other than that) for them to not work at any
time, since the actual memory store is the same for the functional and
"physical" memory. Below is my patch for tweaking the behavior of the
PhysicalMemory to not create errors, not sure if this relates to the
issue you are seeing, however.
- Clint
diff --git a/src/mem/physical.cc b/src/mem/physical.cc
--- a/src/mem/physical.cc
+++ b/src/mem/physical.cc
@@ -325,12 +325,16 @@
if (pmemAddr)
memcpy(pkt->getPtr<uint8_t>(), hostAddr, pkt->getSize());
TRACE_PACKET("Read");
- pkt->makeAtomicResponse();
+ if (pkt->needsResponse()) {
+ pkt->makeAtomicResponse();
+ }
} else if (pkt->isWrite()) {
if (pmemAddr)
memcpy(hostAddr, pkt->getPtr<uint8_t>(), pkt->getSize());
TRACE_PACKET("Write");
- pkt->makeAtomicResponse();
+ if (pkt->needsResponse()) {
+ pkt->makeAtomicResponse();
+ }
} else if (pkt->isPrint()) {
Packet::PrintReqState *prs =
dynamic_cast<Packet::PrintReqState*>(pkt->senderState);
On Apr 27, 2009, at 2:44 AM, Rick Strong wrote:
> Hi all,
>
> I am writing a memory debugger that sits in between L1 and the cpu. It
> maintains a functional memory (like MemTest) that mimics the actions
> the
> memory actions and tests the values for problems. I would like to be
> able to plug this in right after restoring a checkpoint when the
> physical memory has values (from checkpoint) but the functional memory
> is blank. Is there an easy way to initialize a functional memory
> from a
> physical memory?
>
> Also, I see references to MemDebugger class in the cache
> implementations
> which makes me think someone else has gone down this road before. Any
> one know anything?
>
> Thanks,
> -Rick
>
> _______________________________________________
> m5-users mailing list
> [email protected]
> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
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