riscv/rocket-chip
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Author SHA1 Message Date
Howard Mao
82bbbf908d Fix L2 Writeback deadlock issue 
The deadlock condition occurs when the acquire tracker attempts to
request a writeback while the writeback unit is still busy and a
voluntary release for the block to be written back is coming in.

The voluntary release cannot be accepted because it conflicts with the
acquire tracker. The acquire tracker can't merge the voluntary release
because it is waiting to send the writeback. The writeback can't
progress because the release it is waiting on is behind the voluntary
release.

The solution to this is to break the atomicity guarantee between the
acquire tracker and the writeback unit. This allows the voluntary
release tracker to take the voluntary release before the writeback unit
accepts the conflicting request. This causes a potential race condition
for the metadata array. The solution to this is to have the writeback
unit re-read the metadata after accepting a request.
 2016-07-26 12:31:08 -07:00
Howard Mao
1063d90993 make sure L1 and L2 agree on coherence policy 2016-07-25 12:20:49 -07:00
Howard Mao
6a5b2d7f59 fix assembly tests for configurations without VMU and/or user mode 2016-07-22 17:21:57 -07:00
Wesley W. Terpstra
11ec5b2cf4 bram: don't deal with multibeat; rely on the fragmenter 2016-07-22 14:51:05 -07:00
Wesley W. Terpstra
a52d418439 fragmenter: support multi-beat get/put via fragmenting to single-beat operations 2016-07-22 14:48:22 -07:00
Howard Mao
51edd19e85 add U bit to misa register 2016-07-22 14:22:59 -07:00
Howard Mao
75347eed56 some fixes and cleanup to stateless bridge 2016-07-21 19:51:26 -07:00
Howard Mao
9168f35971 clean up the requirements in StatelessBridge 
* No need to check that release ID bits and acquire ID bits the same
 * Check that inner and outer coherence policies match
 2016-07-21 19:41:56 -07:00
Colin Schmidt
a43ad522dc add clock override to tile constructor (#42) 
useful to have upstream so that tape-outs can construct
rocket-chip to have cores on different clocks without
forking rocket
 2016-07-21 17:56:52 -07:00
Howard Mao
12067a3b8d make sure outer probe and finish lines are disconnected 2016-07-21 15:15:44 -07:00
Howard Mao
c38dff0855 add some more warnings about the StatelessBridge 2016-07-21 15:07:10 -07:00
Megan Wachs
c31c650def If NTiles == 1, only use MEI. Also Create configuration for ManagerToClientStatelessBridge. 2016-07-21 13:54:28 -07:00
Megan Wachs
eb9e998c08 Add ManagerToClientStatelessBridge 2016-07-21 13:49:16 -07:00
Howard Mao
0a1cd64786 fix number of builtin Acquire types 2016-07-21 13:45:20 -07:00
Howard Mao
ffe17cbb2b bump uncore for L2 bugfix 2016-07-21 12:35:38 -07:00
Howard Mao
20df74d138 generate more L1 voluntary releases in TraceGen 2016-07-21 12:33:55 -07:00
Howard Mao
86e31be820 fix lockup from back to back releases with data 2016-07-21 12:06:58 -07:00
Howard Mao
24ef4e6dea make sure to use AND not OR for combining finished signals 2016-07-21 12:05:11 -07:00
Howard Mao
d77d0ddc5d rename CacheTest.scala to CacheFillTest.scala 2016-07-20 20:37:45 -07:00
Howard Mao
d56362f04c add configuration checks for TraceGen 2016-07-20 10:37:10 -07:00
Howard Mao
959630630a give LCG an inc signal and add object constructors 2016-07-20 10:36:28 -07:00
Howard Mao
b013925ab0 make sure ReleaseRegression starts only on io.start 2016-07-19 15:42:45 -07:00
Wesley W. Terpstra
9ae23f18bd rocket: support asynchronous external busses 2016-07-19 14:52:56 -07:00
Wesley W. Terpstra
fa8317fec1 debug: add clock crossing primitives 2016-07-19 14:52:43 -07:00
Howard Mao
577c73667b use getSimpleName to dump out test names 2016-07-19 14:42:58 -07:00
Howard Mao
1dac2930eb fix bug in WriteMaskedPutBlockRegression 2016-07-19 14:42:23 -07:00
Howard Mao
19b44ec95b Bug fixes in SimpleHellaCacheIF and L2 agents 
* SimpleHellaCacheIF now properly handles both the non-blocking data
   cache and blocking data cache.
 * SimpleHellaCacheIF maintains ordering of replayed requests
 * L2 VoluntaryReleaseTracker sends voluntary release grant properly
 * Coherence protocols now downgrade for probeCopy
 2016-07-19 09:35:13 -07:00
Howard Mao
bc39d52655 changes to multi-transaction timer 2016-07-18 18:26:18 -07:00
Henry Cook
e406d1bd73 Make probeCopy have same behavior as probeDowngrade 2016-07-18 18:22:49 -07:00
Ben Keller
c069e66056 Modify the RoCC interface to include status in the command queue. (#41) 
This addresses a bug in which changes in mstatus could
propagate to RoCCs before their time. Existing RoCCs that use
the status port will need to be modified to match this change.

This addresses the first half of #40.
 2016-07-18 17:40:50 -07:00
Howard Mao
9eeb1112d4 fix Bufferless irel_vs_iacq_conflict signal 2016-07-18 17:38:20 -07:00
Howard Mao
e5cccc0526 don't update xact_vol_irel if not a voluntary irel 2016-07-18 17:05:23 -07:00
Howard Mao
2723b2f515 fix issues in SimpleHellaCacheIF and document the changes 2016-07-18 17:02:47 -07:00
Howard Mao
40a146f625 HellaCacheArbiter passes through if n == 1 2016-07-18 17:01:29 -07:00
Howard Mao
39a1ecbf3c switch groundtest to merged master 2016-07-18 09:34:27 -07:00
Howard Mao
359252fdc1 fix a width bug 2016-07-18 09:33:17 -07:00
Howard Mao
6fc4236782 add atomic and prefetch drivers 2016-07-18 09:33:17 -07:00
Howard Mao
2ec736ed67 reorder some code in the Nasti unit tests 2016-07-18 09:33:17 -07:00
Howard Mao
3ea299b062 make unit test debug output more meaningful 2016-07-18 09:33:17 -07:00
Howard Mao
def740406c fix a few Driver bugs 2016-07-18 09:33:17 -07:00
Howard Mao
8278a73e83 group unit tests by their tested interface 2016-07-18 09:33:17 -07:00
Howard Mao
9c0fffdd1c start constructing composable tilelink unit test drivers 2016-07-18 09:33:17 -07:00
Howard Mao
c92732dcaa rename MemoryTestDriver to NastiDriver 2016-07-18 09:33:16 -07:00
Howard Mao
c906e6edde some renaming 2016-07-18 09:33:16 -07:00
Howard Mao
1c2bf6e938 make list of unit tests a a parameter 2016-07-18 09:33:16 -07:00
Howard Mao
69eebaf362 factor out unit tests into separate package 2016-07-18 09:33:16 -07:00
Matthew Naylor
4af6313288 TraceGen: Lookup -> MuxLookup 
A recent commit to tracegen.scala introduced a call to BitPat() which
seems to mess up the subsequent call to Lookup().  (This function
seems undocumented so I'm not sure what's going on.)  As a fix, I've
removed the call to BitPat() and replaced Lookup() with MuxLookup().
 2016-07-17 22:28:18 +01:00
Howard Mao
e08ec42bc0 refactor groundtest unittests into separate package 2016-07-16 23:19:55 -07:00
Howard Mao
59d700bf66 fix combinational loop in NASTI -> HASTI converter 2016-07-15 18:45:37 -07:00
mwachs5
cff8de9814 Use new Mul/Div parameters vs UseFastMulDiv (#48) 
* Use new Mul/Div parameters vs UseFastMulDiv

* Rename MulDivUnroll to MulUnroll
 2016-07-15 15:41:20 -07:00