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| author | Steve Reinhardt <steve.reinhardt@amd.com> | 2010-06-16 15:25:57 -0700 |
|---|---|---|
| committer | Steve Reinhardt <steve.reinhardt@amd.com> | 2010-06-16 15:25:57 -0700 |
| commit | f24ae2ec2a43a5197934668b6f9638ed118994d8 (patch) | |
| tree | f51c948e2eedae7d6772228ddb2653aa71622674 /src/mem/packet.cc | |
| parent | 57f2b7db11c9a16f3104588c137e6246bd124041 (diff) | |
| download | gem5-f24ae2ec2a43a5197934668b6f9638ed118994d8.tar.xz | |
cache: fail store conditionals when upgrade loses race
Requires new "SCUpgradeReq" message that marks upgrades
for store conditionals, so downstream caches can fail
these when they run into invalidations.
See http://www.m5sim.org/flyspray/task/197
Diffstat (limited to 'src/mem/packet.cc')
| -rw-r--r-- | src/mem/packet.cc | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/src/mem/packet.cc b/src/mem/packet.cc index 2f84e4414..c54a52438 100644 --- a/src/mem/packet.cc +++ b/src/mem/packet.cc @@ -1,5 +1,6 @@ /* * Copyright (c) 2006 The Regents of The University of Michigan + * Copyright (c) 2010 Advancec Micro Devices, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -92,11 +93,22 @@ MemCmd::commandInfo[] = { SET3(IsWrite, NeedsExclusive, IsResponse), InvalidCmd, "WriteInvalidateResp" }, /* UpgradeReq */ - { SET4(IsInvalidate, NeedsExclusive, IsRequest, NeedsResponse), + { SET5(IsInvalidate, NeedsExclusive, IsUpgrade, IsRequest, NeedsResponse), UpgradeResp, "UpgradeReq" }, + /* SCUpgradeReq: response could be UpgradeResp or UpgradeFailResp */ + { SET6(IsInvalidate, NeedsExclusive, IsUpgrade, IsLlsc, + IsRequest, NeedsResponse), + UpgradeResp, "SCUpgradeReq" }, /* UpgradeResp */ - { SET2(NeedsExclusive, IsResponse), + { SET3(NeedsExclusive, IsUpgrade, IsResponse), InvalidCmd, "UpgradeResp" }, + /* SCUpgradeFailReq: generates UpgradeFailResp ASAP */ + { SET5(IsInvalidate, NeedsExclusive, IsLlsc, + IsRequest, NeedsResponse), + UpgradeFailResp, "SCUpgradeFailReq" }, + /* UpgradeFailResp */ + { SET2(NeedsExclusive, IsResponse), + InvalidCmd, "UpgradeFailResp" }, /* ReadExReq */ { SET5(IsRead, NeedsExclusive, IsInvalidate, IsRequest, NeedsResponse), ReadExResp, "ReadExReq" }, |