Ross Thompson
b5a85b55f1
Reverted to naming IFUStallD to IFUStallF and LSUStallW to LSUStallM. These are generated in the F and M stage.
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Generate WFIStallM in the privileged unit rather than generate in hazard.
Cleaned up the hazard cause logic to be consistent across all causes.
2022-12-23 15:10:37 -06:00
Ross Thompson
6b105bd217
Renamed IFU and LSU stalls.
2022-12-22 21:56:33 -06:00
Ross Thompson
5acdf541b9
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
78acd40424
Renamed signals in the cache.
2022-11-29 10:52:40 -06:00
Ross Thompson
51408c620e
Found a way to remove the interlock fsm. Dramatically reducing the complexity of virtual memory and page table walks.
2022-10-23 13:46:50 -05:00
Ross Thompson
ac864a6ca3
Merged together bram1p1rw with sram1p1rw as sram1p1rw.
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Fixed a major issue with the real SRAM implemenation.
2022-09-21 12:20:00 -05:00
Ross Thompson
c7d3580637
Renamed signals in the LSU.
2022-09-13 11:47:39 -05:00
Ross Thompson
b0aea77b20
Added generate around uncore.
2022-08-25 10:35:24 -05:00
Ross Thompson
01a7718471
Added generate around ebu.
2022-08-25 09:24:13 -05:00
Ross Thompson
517c0f6c35
Changed signal names.
2022-08-17 16:12:04 -05:00
Ross Thompson
719b00e338
Overlapped read fetch line end with eviction write line start. I'm a bit concerned this is not well tested.
2022-07-24 01:20:29 -05:00
bbracker
3b6cb5f0ba
small signs of life on new interrupt spoofing
2022-04-08 12:32:30 -07:00
Skylar Litz
29d1f64588
add AtemptedInstructionCount signal
2022-03-26 21:28:57 +00:00
Ross Thompson
ad237b3ce5
Accidentally cleared dirty bit when setting access bit in hptw.
2022-02-17 16:20:20 -06:00
Ross Thompson
0eec096474
Rough implementation passing regression test with hptw atomic writes to memory.
2022-02-17 14:46:11 -06:00
Ross Thompson
a440bc2ac5
More cache cleanup.
2022-02-13 15:47:27 -06:00
Ross Thompson
1e7e59bdbd
Changed names of signals in cache.
2022-02-13 15:06:18 -06:00
Ross Thompson
b1cba4be2b
Updates to linux wave.
2022-02-11 13:28:18 -06:00
Ross Thompson
9145a96b53
Updated linux wave.
2022-02-11 13:15:42 -06:00
Ross Thompson
3f4ae91468
linux wave cleanup.
2022-02-11 10:48:45 -06:00
Ross Thompson
2f2a4f4500
Fixed subtle and infrequenct bug.
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Loading buildroot at 483M instructions started with a spill + ITLBMiss. The spillsupport logic allowed transition to the second access only after the bus/cache completed the first operation. However the BusStall was suppressed if ITLBMissF occurs resulting in the spillfsm advancing to the second operation. Now the spill logic also takes in ITLBMissF and prevents the early transition to the second access.
2022-02-11 10:46:06 -06:00
Ross Thompson
9ad4523b9d
Updated wave files to reflect recent changes.
2022-02-10 17:52:19 -06:00
David Harris
e92461159d
cache cleanup
2022-02-03 15:36:11 +00:00
Ross Thompson
d2ab17e1af
Repaired linux-wave.do
2022-01-31 12:54:18 -06:00
Ross Thompson
de0bef4f5b
Updated wave.do to match the ifu/lsu changes.
2022-01-28 14:37:15 -06:00
Ross Thompson
1bb8d36308
Moved all instr/load/storeamo faults to mmu with the exception of instr misaligned fault.
2022-01-27 17:11:27 -06:00
David Harris
ca1f7ce5d3
Renamed wallypipelinedhart to wallypipelinedcore
2022-01-20 16:02:08 +00:00
David Harris
f7f3882cb8
Moved Dcache into bus block
2022-01-15 00:39:07 +00:00
David Harris
d9e8d16bbe
Renamed LSUStall to LSUStallM
2022-01-15 00:24:16 +00:00
Ross Thompson
b6ae6fea27
Fixed bug with interlock fsm. The interlock fsm should suppress bus and cache requests by the cpu
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only at the start of a request. Pending interrupt was used to start one of these suppressions;
however because of the way the cache's fsm was separated from the bus fsm, the cache now made requests
to the bus fsm. On a miss with write back, the inital fetch is handled correctly. However if an
interrupt becam pending then the the next request (eviction) made by the cache was also suppressed.
This keeps the d cache fsm stuck in the STATE_MISS_EVICT_DIRTY state as it think it has made a request
to the bus fsm, but the pending interrupt ignored the request.
The solution is to modify how cpu requests are suppressed. Instead of relying on pending interrupt
it is better to use interrupt which will be disabled if the dcache is currently processing the evict.
2022-01-07 17:55:34 -06:00
Ross Thompson
0310df96a4
Changes to wave file.
2022-01-05 14:16:59 -06:00
David Harris
115287adc8
Renamed wally-pipelined to pipelined
2022-01-04 19:47:41 +00:00
