Ross Thompson
626bcd8608
Removed mark_debug from all source code.
2023-01-20 18:47:36 -06:00
Ross Thompson
0123776037
Updated figure cache references.
2023-01-20 15:01:54 -06:00
Ross Thompson
2e9b5f9ae4
Formatting.
2023-01-20 13:13:05 -06:00
Ross Thompson
bcadbd7104
Formatting.
2023-01-20 13:09:42 -06:00
Ross Thompson
ecceea177a
Formatting.
2023-01-20 13:05:10 -06:00
Ross Thompson
3d202ed2fd
Reformatting cachefsm.
2023-01-20 12:49:55 -06:00
Ross Thompson
d3df8e062e
Formatting.
2023-01-20 12:41:57 -06:00
Ross Thompson
29f45d6203
Imperas found a bug with the Fence.I instruction.
...
If a fence.i directly followed a store miss, the d$ would release Stall during the cache line write.
Then transition to ReadHold. This cause the d$ flush to go high while in ReadHold. The solution is
to ensure the cache continues to assert Stall while in WriteLine state.
There was a second issue also. The D$ flush asserted FlushD which flushed the I$ invalidate.
Finally the third issue was CacheEn from the FSM needs to be asserted on an InvalidateCache.
2023-01-20 10:17:21 -06:00
David Harris
56dac4be7d
cache cleanup
2023-01-14 19:43:29 -08:00
David Harris
8c6ddcc15b
changed name to CORE-V-WALLY
2023-01-11 15:15:08 -08:00
David Harris
3ea4dd4898
Changed Wally to CORE-V Wally
2023-01-11 14:03:44 -08:00
David Harris
739c2c8322
Changed MIT license to Solderpad License
2023-01-10 11:35:20 -08:00
David Harris
d7e420e350
Cache code cleanup
2023-01-07 15:49:18 -08:00
David Harris
dc12291ee3
Cache code cleanup
2023-01-07 15:46:23 -08:00
David Harris
057183bcc9
Cache code cleanup
2023-01-07 15:44:44 -08:00
David Harris
0a25f18a07
Cache code cleanup
2023-01-07 15:42:08 -08:00
David Harris
0ad707f1a5
Cache code cleanup
2023-01-07 15:39:13 -08:00
David Harris
d8f0425467
vclean working; started removing unused signals
2023-01-07 05:34:58 -08:00
Ross Thompson
b0d6c9616e
Minor optimizations.
2022-12-23 20:11:36 -06:00
David Harris
0a7ed944a5
Revert to 98b824
2022-12-22 23:58:14 -08:00
David Harris
d4bedca1bf
Code cleanup
2022-12-22 10:04:50 -08:00
Ross Thompson
c8c73f47d2
CacheEn enables reading or writing the cache memory arrays. This is only disabled if we have a stall while in the ready state and we don't have a cache miss. This is a cache hit, but we are stalled.
2022-12-21 22:13:05 -06:00
Ross Thompson
84f8d9953f
Updated cache fsm names to match book.
2022-12-21 16:49:53 -06:00
David Harris
e74d47bcb4
Renamed renamed sram to ram
2022-12-20 08:36:45 -08:00
Ross Thompson
4f56e6ff5d
I think I finally fixed a long hidden bug in the replacement policy. The figures in the textbook are correct. There was small bug in the rtl.
2022-12-18 18:30:35 -06:00
Ross Thompson
73fd3fe040
Finally fixed the lru bug. It was actually a flush bug all along. At the end of flush writeback FlushAdr is incremented so clearly the dirty bit then clears the wrong set. Must either take an additional cycle to clear dirty and then change the address or clear the dirty bit before the cache bus acknowledgment. Changed it to clear at begining of that line's writeback before actually writting back.
2022-12-17 23:47:49 -06:00
Ross Thompson
cdeccd78e6
At long last found the subtle bug in the LRU.
...
Since the LRU memory is two ports, 1 read and 1 write, a write in cycle 1 to address x should not
forward data to a read from address y in cycle 2.
A read form address x in cycle 2 would still require forwarding.
2022-12-17 10:03:08 -06:00
Ross Thompson
ade06f3780
Fixed a bug with the new cache flush changes.
2022-12-16 19:28:32 -06:00
Ross Thompson
89a30e7e37
Further cleanfsm cleanup.
2022-12-16 16:37:45 -06:00
Ross Thompson
9ebea891e2
More cachefsm cache flush cleanup.
2022-12-16 16:32:21 -06:00
Ross Thompson
731fbfc851
Oups found a bug with the new flush cache states.
2022-12-16 16:22:40 -06:00
Ross Thompson
b462554896
Cleanup of cache flush fsm enhancement.
2022-12-16 15:36:53 -06:00
Ross Thompson
dacba855da
Rough draft of cache flush fsm enhancement.
2022-12-16 15:28:22 -06:00
Ross Thompson
09dcb56217
Signal renames to reflect figures.
2022-12-14 09:49:15 -06:00
Ross Thompson
6da7849d27
Reduced complexity of linebytemask.
2022-12-14 09:34:29 -06:00
Ross Thompson
c50a2bd8bf
Changed CPUBusy to Stall in ebu modules.
2022-12-11 15:51:35 -06:00
Ross Thompson
3ddf509f28
Renamed CPUBusy to Stall in cache.
2022-12-11 15:49:34 -06:00
Ross Thompson
d15cf5c65c
Added comments about why it is not possible to use FlushWay and VictimWay directly.
2022-12-09 17:07:35 -06:00
Ross Thompson
38adcb5b17
Minor simplification of cacheway way selection muxes.
2022-12-09 16:42:05 -06:00
Ross Thompson
9806babe9e
Renamed SelBusBuffer to SelFetchBuffer.
2022-12-05 17:51:13 -06:00
Ross Thompson
0fdbfb87eb
Removed commented code.
2022-12-05 17:21:56 -06:00
Ross Thompson
bcb927d172
Renamed VictimTag to just Tag. Tag is used for both the victim and flush tags.
2022-12-05 17:19:51 -06:00
Ross Thompson
2bcaacb179
Cache signal renames.
2022-12-04 16:09:09 -06:00
Ross Thompson
b84b709182
Optimized way selection logic.
2022-12-04 12:30:56 -06:00
Ross Thompson
74d5ccc2b1
Found possible optimization as the way selection is shared in cache, cacheway, and cachelru.
2022-12-04 01:20:51 -06:00
Ross Thompson
62e495c739
Moved selectedway mux into cacheway. It makes way more sense there.
2022-12-04 01:15:47 -06:00
Ross Thompson
e1ac736d43
Rename LineByteMux to FetchbufferbyteSel.
2022-12-04 01:00:04 -06:00
Ross Thompson
1d9b5badee
Properly flush cacheLRU.
2022-12-01 17:32:58 -06:00
Ross Thompson
cb310bfb1d
Removed unused port on cacheway.
2022-12-01 11:47:48 -06:00
Ross Thompson
813b2963fb
More optimization.
2022-11-30 11:26:48 -06:00
