From a94c68228a29562c382a4587ce9cf18101f9babc Mon Sep 17 00:00:00 2001 From: Steve Reinhardt Date: Tue, 10 Mar 2009 17:37:15 -0700 Subject: prefetch: don't panic on requests w/o contextID (e.g., writebacks). --- src/mem/cache/prefetch/ghb.cc | 7 ++++++- src/mem/cache/prefetch/stride.cc | 5 +++++ 2 files changed, 11 insertions(+), 1 deletion(-) (limited to 'src/mem/cache') diff --git a/src/mem/cache/prefetch/ghb.cc b/src/mem/cache/prefetch/ghb.cc index c27165248..f8f7de1db 100644 --- a/src/mem/cache/prefetch/ghb.cc +++ b/src/mem/cache/prefetch/ghb.cc @@ -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 &addresses, std::list &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); diff --git a/src/mem/cache/prefetch/stride.cc b/src/mem/cache/prefetch/stride.cc index cfd2469fa..8af4e615e 100644 --- a/src/mem/cache/prefetch/stride.cc +++ b/src/mem/cache/prefetch/stride.cc @@ -46,6 +46,11 @@ StridePrefetcher::calculatePrefetch(PacketPtr &pkt, std::list &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(); -- cgit v1.2.3