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prefetch: don't panic on requests w/o contextID (e.g., writebacks).

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This commit is contained in:
Steve Reinhardt 2009-03-10 17:37:15 -07:00
parent ac64586a99
commit a94c68228a
3 changed files with 18 additions and 2 deletions
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7
src/mem/cache/prefetch/ghb.cc vendored
View file

@ -34,13 +34,18 @@
* GHB Prefetcher implementation.
*/
#include "base/trace.hh"
#include "mem/cache/prefetch/ghb.hh"
#include "arch/isa_traits.hh"
void
GHBPrefetcher::calculatePrefetch(PacketPtr &pkt, std::list<Addr> &addresses,
std::list<Tick> &delays)
{
if (useContextId && !pkt->req->hasContextId()) {
DPRINTF(HWPrefetch, "ignoring request with no context ID");
return;
}
Addr blk_addr = pkt->getAddr() & ~(Addr)(blkSize-1);
int ctx_id = useContextId ? pkt->req->contextId() : 0;
assert(ctx_id < Max_Contexts);

5
src/mem/cache/prefetch/stride.cc vendored
View file

@ -46,6 +46,11 @@ StridePrefetcher::calculatePrefetch(PacketPtr &pkt, std::list<Addr> &addresses,
return;
}
if (useContextId && !pkt->req->hasContextId()) {
DPRINTF(HWPrefetch, "ignoring request with no context ID");
return;
}
Addr blk_addr = pkt->getAddr() & ~(Addr)(blkSize-1);
int ctx_id = useContextId ? pkt->req->contextId() : 0;
Addr pc = pkt->req->getPC();

8
src/mem/request.hh
View file

@ -409,6 +409,12 @@ class Request : public FastAlloc
flags.set(VALID_EXTRA_DATA);
}
bool
hasContextId() const
{
return flags.isSet(VALID_CONTEXT_ID);
}
/** Accessor function for context ID.*/
int
contextId() const
@ -425,13 +431,13 @@ class Request : public FastAlloc
return _threadId;
}
/** Accessor function for pc.*/
bool
hasPC() const
{
return flags.isSet(VALID_PC);
}
/** Accessor function for pc.*/
Addr
getPC() const
{