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authorBrad Beckmann <Brad.Beckmann@amd.com>2010-08-20 11:46:13 -0700
committerBrad Beckmann <Brad.Beckmann@amd.com>2010-08-20 11:46:13 -0700
commit72044e3f5a5b9455e07180806793127be2014451 (patch)
treefe2e7f7f129a31dccf84ee2d0bfc93d9c76b7f07 /src/kern
parentbcdd19df03ed047e4ce03dbf81bc40173cc3217b (diff)
downloadgem5-72044e3f5a5b9455e07180806793127be2014451.tar.xz
ruby: Disable migratory sharing for token and hammer
This patch allows one to disable migratory sharing for those cache blocks that are accessed by atomic requests. While the implementations are different between the token and hammer protocols, the motivation is the same. For Alpha, LLSC semantics expect that normal loads do not unlock cache blocks that have been locked by LL accesses. Therefore, locked blocks should not transfer write permissions when responding to these load requests. Instead, only they only transfer read permissions so that the subsequent SC access can possibly succeed.
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