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Commit Graph

5388 Commits

Author SHA1 Message Date
Andrew Waterman
76f33d88a6 [rocket] Respect physical memory protection during page table walks 2016-08-02 17:20:49 -07:00
Andrew Waterman
5d4f6383f2 [rocket] Automatically kill D$ access on address exceptions
Doing this internally to the cache eliminates a long control path
from the cache to the core and back to the cache.
2016-08-02 17:20:49 -07:00
Andrew Waterman
b54db0ba23 [rocket] don't update BTB on not-taken branches
Only update the BHT; don't set the target prediction to pc+4.
2016-08-02 17:20:49 -07:00
Andrew Waterman
64bde1060c [rocket] remove unused code in ibuf 2016-08-02 15:26:09 -07:00
Andrew Waterman
2ce702dc0a [rocket] fix PTW critical path
Pipeline the killing of a D$ request following a PTW cache hit.
2016-08-02 15:19:48 -07:00
Andrew Waterman
7e9d139e49 [rocket] remove rocket-specific require() from HasCoreParameters 2016-08-02 15:19:48 -07:00
Andrew Waterman
791a27748b Update firrtl and remove firrtl hack in plic 2016-08-02 15:19:48 -07:00
Howard Mao
f04aefc95c get rid of deprecated ZynqAdapter 2016-08-02 13:14:20 -07:00
Howard Mao
63b814fcd7 only run the important (high coverage) tests in regression suite 2016-08-02 10:54:05 -07:00
Howard Mao
b7723f1ff8 make unit tests local to the packages being tested 2016-08-01 17:02:00 -07:00
Howard Mao
98eede0505 some refactoring in RocketChip top-level 2016-08-01 17:02:00 -07:00
Megan Wachs
55c992bb3a Use FoldRight() instead of for loop 2016-08-01 16:56:33 -07:00
Megan Wachs
8db2e8829f Allow aggregate CONFIG on Command Line 2016-08-01 14:24:16 -07:00
Andrew Waterman
fe670e5421 Stop using deprecated FileSystemUtilities to create files 2016-07-31 18:04:56 -07:00
Andrew Waterman
832e56d3c7 Fix toBits/toUInt/toSInt deprecation warnings 2016-07-31 17:13:52 -07:00
Andrew Waterman
a6e009d8de [rocket] Fix frontend mask when fetchWidth == 1 2016-07-31 15:21:17 -07:00
Andrew Waterman
c49dad2e9d Improve PTW QoR 2016-07-29 17:56:42 -07:00
Andrew Waterman
cc635c386f Make Chisel3 the default version for SBT 2016-07-29 17:56:42 -07:00
mwachs5
4465260469 Update README.md
- List things that are no longer submodules as subpackages instead
- clean up some formatting issues
2016-07-29 17:56:42 -07:00
Andrew Waterman
058396aefe [rocket] Implement RVC 2016-07-29 17:56:42 -07:00
Andrew Waterman
c465120610 [rocket] use more standard pattern for computing integer min 2016-07-29 17:56:42 -07:00
Andrew Waterman
ffac86b041 [rocket] only write badaddr on certain exceptions 2016-07-29 17:56:42 -07:00
Andrew Waterman
0d3d9fca25 [rocket] Allow zapping of BTB entries
This is necessary to guarantee forward progress with RVC, since if the
BTB keeps mispredicting, the processor might never successfully
fetch both halves of a misaligned instruction.
2016-07-29 17:56:42 -07:00
Andrew Waterman
8e0392f24b [rocket] don't hard-code instruction width in BHT 2016-07-29 17:56:42 -07:00
Howard Mao
f34b0b0447 make sure L2 tracker doesn't read data array again if data buffer already filled 2016-07-29 16:47:31 -07:00
Howard Mao
2891eb879a add MergedPutRegression to uncover merged put after release bug in L2 2016-07-29 16:42:28 -07:00
Howard Mao
064020bdd7 make sure Memtest generators write different data to each address 2016-07-29 14:22:46 -07:00
Howard Mao
5a3beca097 add RepeatedGetRegression to uncover L2 merged get miss bug 2016-07-28 19:58:47 -07:00
Howard Mao
cb86aaa46b fix trace generator addresses 2016-07-28 17:56:14 -07:00
Andrew Waterman
8a7fc75b53 fix metadata race in blocking L1 DCache 2016-07-28 17:54:28 -07:00
Howard Mao
bd5972503f move groundtest/scripts to top-level scripts/ 2016-07-28 11:36:55 -07:00
Howard Mao
478f494626 Merge remote-tracking branch 'groundtest/master' into mono-repo 2016-07-28 11:28:06 -07:00
Howard Mao
a5b88d0bdc Merge remote-tracking branch 'junctions/master' into mono-repo 2016-07-28 11:27:47 -07:00
Howard Mao
373fd427dc Merge remote-tracking branch 'rocket/master' into mono-repo 2016-07-28 11:27:29 -07:00
Howard Mao
ce242b8f3f Merge remote-tracking branch 'uncore/master' into mono-repo 2016-07-28 11:23:31 -07:00
Howard Mao
aefba04fb3 get rid of submodules in preparation for merging 2016-07-28 11:21:08 -07:00
Howard Mao
6de2a3e3b1 get rid of fpga-zynq submodule 2016-07-28 11:07:47 -07:00
Howard Mao
fe51a35fa9 a few more submodule bumps 2016-07-28 09:25:59 -07:00
Howard Mao
bf35f980a6 make sure PTE cache is power of 2 in size to satisfy PseudoLRU requirement 2016-07-27 18:40:38 -07:00
Howard Mao
fbcc7317cf make sure PseudoLRU is given power of 2 ways 2016-07-27 18:39:33 -07:00
Howard Mao
15d1aa9346 make sure TrackerAllocationIO addr_block has correct direction set 2016-07-27 16:47:22 -07:00
Howard Mao
9c89290efc fix LRSC issue (fixes issue #86) 2016-07-26 22:25:04 -07:00
Howard Mao
0bd7ef1278 re-enable SCs inflight with other requests 2016-07-26 22:21:41 -07:00
Howard Mao
df07771fa0 add uncached noise generator to TraceGen 2016-07-26 22:21:10 -07:00
Howard Mao
dcfcac9530 fix LRSC issue (RocketChip issue #86)
It was possible that the result of a store-conditional could get lost if it
did not depend on the result of the corresponding load-reserved.

This was because the MSHR does not update the client state based on the
secondary requests. So the LR would acquire the line in clientExcusiveClean,
but then we would fail to update the metadata array to change the state
to clientExclusiveDirty.

The solution is to track whether a secondary acquire would cause the
line to be dirty. If so, use M_XWR instead of the primary command to
generate the update coherence state.
2016-07-26 18:41:52 -07:00
Howard Mao
ecd1af326c fix L2 deadlock bug and add more advanced trace generator 2016-07-26 12:43:08 -07:00
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