2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * Authors: Erik Hallnor
31 #include "mem/cache/coherence/uni_coherence.hh"
32 #include "mem/cache/base_cache.hh"
34 #include "base/trace.hh"
38 UniCoherence::UniCoherence()
44 UniCoherence::getPacket()
46 PacketPtr pkt
= cshrs
.getReq();
51 UniCoherence::sendResult(PacketPtr
&pkt
, MSHR
* cshr
, bool success
)
55 bool unblock
= cshrs
.isFull();
56 // cshrs.markInService(cshr);
57 cshrs
.deallocate(cshr
);
58 if (!cshrs
.havePending()) {
59 cache
->clearSlaveRequest(Request_Coherence
);
62 //since CSHRs are always used as buffers, should always get rid of one
63 assert(!cshrs
.isFull());
64 cache
->clearBlocked(Blocked_Coherence
);
71 * @todo add support for returning slave requests, not doing them here.
74 UniCoherence::handleBusRequest(PacketPtr
&pkt
, CacheBlk
*blk
, MSHR
*mshr
,
75 CacheBlk::State
&new_state
)
78 if (pkt
->isInvalidate()) {
79 DPRINTF(Cache
, "snoop inval on blk %x (blk ptr %x)\n",
83 new_state
= blk
->status
;
89 UniCoherence::propogateInvalidate(PacketPtr pkt
, bool isTiming
)
91 if (pkt
->isInvalidate()) {
93 // Forward to other caches
94 PacketPtr tmp
= new Packet(pkt
->req
, Packet::InvalidateReq
, -1);
96 cache
->setSlaveRequest(Request_Coherence
, curTick
);
98 cache
->setBlockedForSnoop(Blocked_Coherence
);
101 PacketPtr tmp
= new Packet(pkt
->req
, Packet::InvalidateReq
, -1);
102 cache
->cpuSidePort
->sendAtomic(tmp
);