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| author | Nikos Nikoleris <nikos.nikoleris@arm.com> | 2016-05-26 09:49:52 +0100 |
|---|---|---|
| committer | Nikos Nikoleris <nikos.nikoleris@arm.com> | 2017-12-05 11:47:01 +0000 |
| commit | d8afb8679301392561f4255edb9789d22aec5a2e (patch) | |
| tree | 5e7e70f6a26da8b20a3c63fe1ff0612d3b8bc60c | |
| parent | ad000b5606b37df7b474647675eea97b69e2d6c5 (diff) | |
| download | gem5-d8afb8679301392561f4255edb9789d22aec5a2e.tar.xz | |
mem: Add a WriteClean command to the packet class
A WriteClean packet allows a cache to write a block to a memory below
without evicting its copy. A typical usecase for a WriteClean packet
is a cache clean operation.
Change-Id: If356cb067da5ddf3210c135f41ef0891fb811568
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-by: Anouk Van Laer <anouk.vanlaer@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/5044
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
| -rw-r--r-- | src/mem/packet.cc | 5 | ||||
| -rw-r--r-- | src/mem/packet.hh | 3 |
2 files changed, 6 insertions, 2 deletions
diff --git a/src/mem/packet.cc b/src/mem/packet.cc index e05783ca9..75dfb28cb 100644 --- a/src/mem/packet.cc +++ b/src/mem/packet.cc @@ -1,5 +1,5 @@ /* - * Copyright (c) 2011-2016 ARM Limited + * Copyright (c) 2011-2017 ARM Limited * All rights reserved * * The license below extends only to copyright in the software and shall @@ -95,6 +95,9 @@ MemCmd::commandInfo[] = * dirty. */ { SET5(IsWrite, IsRequest, IsEviction, HasData, FromCache), InvalidCmd, "WritebackClean" }, + /* WriteClean - This allows a cache to write a dirty block to a memory + below without evicting its copy. */ + { SET4(IsWrite, IsRequest, HasData, FromCache), InvalidCmd, "WriteClean" }, /* CleanEvict */ { SET3(IsRequest, IsEviction, FromCache), InvalidCmd, "CleanEvict" }, /* SoftPFReq */ diff --git a/src/mem/packet.hh b/src/mem/packet.hh index 0920f223b..330e2ae5e 100644 --- a/src/mem/packet.hh +++ b/src/mem/packet.hh @@ -1,5 +1,5 @@ /* - * Copyright (c) 2012-2016 ARM Limited + * Copyright (c) 2012-2017 ARM Limited * All rights reserved * * The license below extends only to copyright in the software and shall @@ -88,6 +88,7 @@ class MemCmd WriteResp, WritebackDirty, WritebackClean, + WriteClean, // writes dirty data below without evicting CleanEvict, SoftPFReq, HardPFReq, |