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-rw-r--r--src/mem/cache/BaseCache.py8
-rw-r--r--src/mem/cache/base.cc9
-rw-r--r--src/mem/cache/base.hh20
-rw-r--r--src/mem/cache/cache.hh6
-rw-r--r--src/mem/cache/cache_impl.hh92
5 files changed, 66 insertions, 69 deletions
diff --git a/src/mem/cache/BaseCache.py b/src/mem/cache/BaseCache.py
index bef1b45d2..bdef07cb4 100644
--- a/src/mem/cache/BaseCache.py
+++ b/src/mem/cache/BaseCache.py
@@ -45,6 +45,8 @@ class BaseCache(MemObject):
"always service demand misses first")
repl = Param.Repl(NULL, "replacement policy")
size = Param.MemorySize("capacity in bytes")
+ forward_snoops = Param.Bool(True,
+ "forward snoops from mem side to cpu side")
subblock_size = Param.Int(0,
"Size of subblock in IIC used for compression")
tgts_per_mshr = Param.Int("max number of accesses per MSHR")
@@ -74,8 +76,4 @@ class BaseCache(MemObject):
"Only prefetch on data not on instruction accesses")
cpu_side = Port("Port on side closer to CPU")
mem_side = Port("Port on side closer to MEM")
- cpu_side_filter_ranges = VectorParam.AddrRange([],
- "What addresses shouldn't be passed through the side of the bridge")
- mem_side_filter_ranges = VectorParam.AddrRange([],
- "What addresses shouldn't be passed through the side of the bridge")
- addr_range = VectorParam.AddrRange(AllMemory, "The address range in bytes")
+ addr_range = Param.AddrRange(AllMemory, "The address range for the CPU-side port")
diff --git a/src/mem/cache/base.cc b/src/mem/cache/base.cc
index 956375530..29fa97544 100644
--- a/src/mem/cache/base.cc
+++ b/src/mem/cache/base.cc
@@ -41,11 +41,10 @@
using namespace std;
BaseCache::CachePort::CachePort(const std::string &_name, BaseCache *_cache,
- const std::string &_label,
- std::vector<Range<Addr> > filter_ranges)
+ const std::string &_label)
: SimpleTimingPort(_name, _cache), cache(_cache),
label(_label), otherPort(NULL),
- blocked(false), mustSendRetry(false), filterRanges(filter_ranges)
+ blocked(false), mustSendRetry(false)
{
}
@@ -58,10 +57,12 @@ BaseCache::BaseCache(const Params *p)
blkSize(p->block_size),
hitLatency(p->latency),
numTarget(p->tgts_per_mshr),
+ forwardSnoops(p->forward_snoops),
blocked(0),
noTargetMSHR(NULL),
missCount(p->max_miss_count),
- drainEvent(NULL)
+ drainEvent(NULL),
+ addrRange(p->addr_range)
{
}
diff --git a/src/mem/cache/base.hh b/src/mem/cache/base.hh
index 4319717e5..d33c655d7 100644
--- a/src/mem/cache/base.hh
+++ b/src/mem/cache/base.hh
@@ -100,8 +100,7 @@ class BaseCache : public MemObject
protected:
CachePort(const std::string &_name, BaseCache *_cache,
- const std::string &_label,
- std::vector<Range<Addr> > filter_ranges);
+ const std::string &_label);
virtual void recvStatusChange(Status status);
@@ -129,9 +128,6 @@ class BaseCache : public MemObject
bool mustSendRetry;
- /** filter ranges */
- std::vector<Range<Addr> > filterRanges;
-
void requestBus(RequestCause cause, Tick time)
{
DPRINTF(CachePort, "Asserting bus request for cause %d\n", cause);
@@ -194,8 +190,8 @@ class BaseCache : public MemObject
/** The number of targets for each MSHR. */
const int numTarget;
- /** Increasing order number assigned to each incoming request. */
- uint64_t order;
+ /** Do we forward snoops from mem side port through to cpu side port? */
+ bool forwardSnoops;
/**
* Bit vector of the blocking reasons for the access path.
@@ -203,6 +199,9 @@ class BaseCache : public MemObject
*/
uint8_t blocked;
+ /** Increasing order number assigned to each incoming request. */
+ uint64_t order;
+
/** Stores time the cache blocked for statistics. */
Tick blockedCycle;
@@ -215,6 +214,11 @@ class BaseCache : public MemObject
/** The drain event. */
Event *drainEvent;
+ /**
+ * The address range to which the cache responds on the CPU side.
+ * Normally this is all possible memory addresses. */
+ Range<Addr> addrRange;
+
public:
// Statistics
/**
@@ -377,6 +381,8 @@ class BaseCache : public MemObject
Addr blockAlign(Addr addr) const { return (addr & ~(blkSize - 1)); }
+ const Range<Addr> &getAddrRange() const { return addrRange; }
+
MSHR *allocateMissBuffer(PacketPtr pkt, Tick time, bool requestBus)
{
assert(!pkt->req->isUncacheable());
diff --git a/src/mem/cache/cache.hh b/src/mem/cache/cache.hh
index 4570b067b..6cb6233f5 100644
--- a/src/mem/cache/cache.hh
+++ b/src/mem/cache/cache.hh
@@ -71,8 +71,7 @@ class Cache : public BaseCache
public:
CpuSidePort(const std::string &_name,
Cache<TagStore> *_cache,
- const std::string &_label,
- std::vector<Range<Addr> > filterRanges);
+ const std::string &_label);
// BaseCache::CachePort just has a BaseCache *; this function
// lets us get back the type info we lost when we stored the
@@ -96,8 +95,7 @@ class Cache : public BaseCache
public:
MemSidePort(const std::string &_name,
Cache<TagStore> *_cache,
- const std::string &_label,
- std::vector<Range<Addr> > filterRanges);
+ const std::string &_label);
// BaseCache::CachePort just has a BaseCache *; this function
// lets us get back the type info we lost when we stored the
diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh
index ea8ae0046..82db7750c 100644
--- a/src/mem/cache/cache_impl.hh
+++ b/src/mem/cache/cache_impl.hh
@@ -40,7 +40,7 @@
#include "sim/host.hh"
#include "base/fast_alloc.hh"
#include "base/misc.hh"
-#include "base/range_ops.hh"
+#include "base/range.hh"
#include "mem/cache/cache.hh"
#include "mem/cache/blk.hh"
@@ -62,11 +62,9 @@ Cache<TagStore>::Cache(const Params *p, TagStore *tags, BasePrefetcher *pf)
tempBlock->data = new uint8_t[blkSize];
cpuSidePort = new CpuSidePort(p->name + "-cpu_side_port", this,
- "CpuSidePort",
- p->cpu_side_filter_ranges);
+ "CpuSidePort");
memSidePort = new MemSidePort(p->name + "-mem_side_port", this,
- "MemSidePort",
- p->mem_side_filter_ranges);
+ "MemSidePort");
cpuSidePort->setOtherPort(memSidePort);
memSidePort->setOtherPort(cpuSidePort);
@@ -96,8 +94,7 @@ Cache<TagStore>::getPort(const std::string &if_name, int idx)
} else if (if_name == "functional") {
CpuSidePort *funcPort =
new CpuSidePort(name() + "-cpu_side_funcport", this,
- "CpuSideFuncPort",
- std::vector<Range<Addr> >());
+ "CpuSideFuncPort");
funcPort->setOtherPort(memSidePort);
return funcPort;
} else {
@@ -1063,35 +1060,37 @@ Cache<TagStore>::handleSnoop(PacketPtr pkt, BlkType *blk,
assert(!(pending_inval && !is_deferred));
assert(pkt->isRequest());
- // first propagate snoop upward to see if anyone above us wants to
- // handle it. save & restore packet src since it will get
- // rewritten to be relative to cpu-side bus (if any)
- bool alreadyResponded = pkt->memInhibitAsserted();
- if (is_timing) {
- Packet *snoopPkt = new Packet(pkt, true); // clear flags
- snoopPkt->setExpressSnoop();
- snoopPkt->senderState = new ForwardResponseRecord(pkt, this);
- cpuSidePort->sendTiming(snoopPkt);
- if (snoopPkt->memInhibitAsserted()) {
- // cache-to-cache response from some upper cache
- assert(!alreadyResponded);
- pkt->assertMemInhibit();
+ if (forwardSnoops) {
+ // first propagate snoop upward to see if anyone above us wants to
+ // handle it. save & restore packet src since it will get
+ // rewritten to be relative to cpu-side bus (if any)
+ bool alreadyResponded = pkt->memInhibitAsserted();
+ if (is_timing) {
+ Packet *snoopPkt = new Packet(pkt, true); // clear flags
+ snoopPkt->setExpressSnoop();
+ snoopPkt->senderState = new ForwardResponseRecord(pkt, this);
+ cpuSidePort->sendTiming(snoopPkt);
+ if (snoopPkt->memInhibitAsserted()) {
+ // cache-to-cache response from some upper cache
+ assert(!alreadyResponded);
+ pkt->assertMemInhibit();
+ } else {
+ delete snoopPkt->senderState;
+ }
+ if (snoopPkt->sharedAsserted()) {
+ pkt->assertShared();
+ }
+ delete snoopPkt;
} else {
- delete snoopPkt->senderState;
- }
- if (snoopPkt->sharedAsserted()) {
- pkt->assertShared();
- }
- delete snoopPkt;
- } else {
- int origSrc = pkt->getSrc();
- cpuSidePort->sendAtomic(pkt);
- if (!alreadyResponded && pkt->memInhibitAsserted()) {
- // cache-to-cache response from some upper cache:
- // forward response to original requester
- assert(pkt->isResponse());
+ int origSrc = pkt->getSrc();
+ cpuSidePort->sendAtomic(pkt);
+ if (!alreadyResponded && pkt->memInhibitAsserted()) {
+ // cache-to-cache response from some upper cache:
+ // forward response to original requester
+ assert(pkt->isResponse());
+ }
+ pkt->setSrc(origSrc);
}
- pkt->setSrc(origSrc);
}
if (!blk || !blk->isValid()) {
@@ -1385,11 +1384,10 @@ void
Cache<TagStore>::CpuSidePort::
getDeviceAddressRanges(AddrRangeList &resp, bool &snoop)
{
- // CPU side port doesn't snoop; it's a target only.
- bool dummy;
- otherPort->getPeerAddressRanges(resp, dummy);
- FilterRangeList(filterRanges, resp);
+ // CPU side port doesn't snoop; it's a target only. It can
+ // potentially respond to any address.
snoop = false;
+ resp.push_back(myCache()->getAddrRange());
}
@@ -1428,9 +1426,8 @@ Cache<TagStore>::CpuSidePort::recvFunctional(PacketPtr pkt)
template<class TagStore>
Cache<TagStore>::
CpuSidePort::CpuSidePort(const std::string &_name, Cache<TagStore> *_cache,
- const std::string &_label,
- std::vector<Range<Addr> > filterRanges)
- : BaseCache::CachePort(_name, _cache, _label, filterRanges)
+ const std::string &_label)
+ : BaseCache::CachePort(_name, _cache, _label)
{
}
@@ -1445,11 +1442,9 @@ void
Cache<TagStore>::MemSidePort::
getDeviceAddressRanges(AddrRangeList &resp, bool &snoop)
{
- otherPort->getPeerAddressRanges(resp, snoop);
- FilterRangeList(filterRanges, resp);
-
- // Memory-side port always snoops, so unconditionally set flag for
- // caller.
+ // Memory-side port always snoops, but never passes requests
+ // through to targets on the cpu side (so we don't add anything to
+ // the address range list).
snoop = true;
}
@@ -1581,9 +1576,8 @@ Cache<TagStore>::MemSidePort::processSendEvent()
template<class TagStore>
Cache<TagStore>::
MemSidePort::MemSidePort(const std::string &_name, Cache<TagStore> *_cache,
- const std::string &_label,
- std::vector<Range<Addr> > filterRanges)
- : BaseCache::CachePort(_name, _cache, _label, filterRanges)
+ const std::string &_label)
+ : BaseCache::CachePort(_name, _cache, _label)
{
// override default send event from SimpleTimingPort
delete sendEvent;
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-15 01:56:31 +0000