David Harris
2cfbd888fd
more lsu/ifu lint cleanup
2021-10-23 12:00:32 -07:00
David Harris
62a23fe878
lsu/ifu lint cleanup
2021-10-23 11:41:20 -07:00
David Harris
8e516e6391
Lint cleanup from wallypipeliendhart
2021-10-23 10:29:52 -07:00
David Harris
33358d101e
Lint cleanup: ahblite, ifu, hart
2021-10-23 10:12:33 -07:00
Ross Thompson
0b1e59d075
Updated Dcache to fully support flush. This appears to work.
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Updated PCNextF so it points to the correct PC after icache invalidate.
Build root crashes with PCW mismatch and invalid register writes.
2021-09-17 10:25:21 -05:00
Ross Thompson
cae350abb7
Added invalidate to icache.
2021-09-16 16:15:54 -05:00
David Harris
9ae25b0cea
Added Zfencei support in instruction decoder and configurations. Also added riscv-arch-test 32-bit tests to regression.
2021-09-15 13:14:00 -04:00
Ross Thompson
dac93bb366
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-07-21 16:44:32 -05:00
Kip Macsai-Goren
c69a5dc8a6
fixed issue with tlbflush remaining high during a stalled sfence instruction
2021-07-21 17:43:36 -04:00
Ross Thompson
4d53b9002f
Broken.
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Possible change to walker, dcache, tlb addressing.
Improves the naming of address signals.
But has a problem when the walker finishes the dcache does not get the correct
address on the cycle the DTLB is updated. This leads to incorrect index
selection in the dcache.
2021-07-19 10:33:27 -05:00
David Harris
863e6e72d6
hptw: Propagating PageTableEntryF removal through IFU
2021-07-17 15:04:39 -04:00
David Harris
b65788d165
Replaced separate PageTypeF and PageTypeM with common PageType
2021-07-17 02:31:23 -04:00
Ross Thompson
e5d624c1fa
Found bug in the PMA such that invalid addresses were sent to the tim. Once addressing this issue the sv48 test fails early with a pma access fault.
2021-07-15 11:56:35 -05:00
Ross Thompson
fa26aec588
Merge branch 'main' into dcache
2021-07-15 11:55:20 -05:00
Ross Thompson
3e57c899a2
Partially working changes to support uncached memory access. Not sure what CommitedM is.
2021-07-13 17:24:59 -05:00
Ross Thompson
93aa39ca31
completed read miss branch through dcache fsm.
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The challenge now is to connect to ahb and lsu.
2021-07-08 17:53:08 -05:00
David Harris
032c38b7e7
MMU produces page fault when upper bits aren't equal. Renamed input to MMU to be 'Address' and moved translation mux into MMU out of TLB
2021-07-06 15:29:42 -04:00
Ross Thompson
3345ed7ff4
Merged several of the load/store/instruction access faults inside the mmu.
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Still need to figure out what is wrong with the generation of load page fault when dtlb hit.
2021-07-06 13:43:53 -05:00
David Harris
694badcc6b
Created tlbcontrol module to hide details
2021-07-06 03:25:11 -04:00
David Harris
b23192cf1b
Gave names to for loops in generate blocks for ease of reference
2021-07-04 18:52:16 -04:00
David Harris
80666f0a71
Added ASID & Global PTE handling to TLB CAM
2021-07-04 17:52:00 -04:00
David Harris
7e22ae973e
Fixed MPRV and MXR checks in TLB
2021-07-04 13:20:29 -04:00
David Harris
67e191c6f3
Added support for PMP lock bits in csrm and repartitioned design to pass around 8-bit PMPCFG entries
2021-07-04 11:39:59 -04:00
David Harris
1fa4abf7b6
Changed IMMU ExecuteAccessF to 1 rather than InstrReadF to fix buildroot; simplified PMP checker
2021-07-03 03:29:33 -04:00
Ross Thompson
7b3716c281
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-07-02 13:56:49 -05:00
David Harris
c85e0df1ff
Optimized PMP checker logic and added support for configurable number of PMP registers
2021-07-02 11:04:13 -04:00
Ross Thompson
118dfa9cec
added page table walker fault exit for icache.
2021-07-01 17:59:55 -05:00
Kip Macsai-Goren
ac597d78c8
Removed AHB address, etc signals from physical memory checkers, replaced with physical address from cpu or ptw. Passes lint but not simulations.
2021-06-24 19:59:29 -04:00
Ross Thompson
aeeaf6d919
Progress.
2021-06-24 13:05:22 -05:00
Kip Macsai-Goren
c8f80967a6
added a few very simple arbitrations in the lsuArb that pass regression. cleaned up a few unused signals. Added several comments and concerns to lsuarb so I can remember where my thoughts were at the end of the day.
2021-06-23 19:59:06 -04:00
Ross Thompson
9b8bcb8e57
Split the ReadDataW bus into two parts in preparation for the data cache. On the AHB side it is now HRDATAW and on the CPU to data cache side it is ReadDataW. lsu.sv now handles the connection between the two.
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Also reorganized the inputs and outputs of lsu and pagetablewalker into connects between CPU, pagetablewalker, and AHB.
Finally add DisableTranslation to TLB as teh pagetablewalker will need to force no translation when active regardless of the state of SATP.
With Kip.
2021-06-23 16:43:22 -05:00
Ross Thompson
f74ecbb81e
Updated icache to abhlite to use pa_bits length and moved F/D stage instr register to ifu from icache.
2021-06-23 15:13:56 -05:00
Ross Thompson
f79e5eaa47
Icache now uses physical lenght bits rather than XLEN.
2021-06-21 16:41:09 -05:00
David Harris
5d6dc82db2
Added Physical Address and Size to PMA Checker/MMU
2021-06-21 01:27:02 -04:00
David Harris
1ec90a5e1f
Reversed [0:...] with [...:0] in bus widths across the project
2021-06-21 01:17:08 -04:00
Ross Thompson
70c45a5349
Revert "Icache now uses physical lenght bits rather than XLEN."
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This reverts commit 16266d978a
2021-06-19 08:58:34 -05:00
Ross Thompson
16266d978a
Icache now uses physical lenght bits rather than XLEN.
2021-06-18 12:02:59 -05:00
David Harris
de221ff2d0
Changed physical addresses to PA_BITS in size in MMU and TLB
2021-06-18 09:11:31 -04:00
David Harris
75870a16d7
Restored PCCorrectE declaration in IFU
2021-06-09 21:09:16 -04:00
David Harris
0ffbd03139
More verilator fixes, but bpred is broken
2021-06-09 21:03:03 -04:00
David Harris
90e5781471
Start to parameterize number of PMP Entries
2021-06-08 15:29:22 -04:00
Kip Macsai-Goren
d6f47d5917
making mmu branch line up with main
2021-06-08 13:59:03 -04:00
Kip Macsai-Goren
e209dbcf50
some cleanup of signals, not done yet
2021-06-08 13:39:32 -04:00
Kip Macsai-Goren
49200bd922
Cleaned up some unused signals
2021-06-04 21:04:19 -04:00
Kip Macsai-Goren
1ae529c450
restructured so that pma/pmp are a part of mmu
2021-06-04 17:05:07 -04:00
David Harris
a26bf37be8
Started MMU
2021-06-04 11:59:14 -04:00
Ross Thompson
89ad4477e4
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-06-01 11:33:12 -05:00
bbracker
39ae743543
turns out I should not have tried renaming FStallD to FPUStallD because that name was already used! All the same it does feel weird to have two such signals floating around \(ah pun!\)
2021-05-28 23:11:37 -04:00
Ross Thompson
8a035104ac
It's a bit sloppy, but the global history predictor is working correctly now.
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There were two major bugs with the predictor.
First the update mechanism was completely wrong. The PHT is updated with the GHR that was used to lookup the prediction. PHT[GHR] = Sat2(PHT[GHR], branch outcome).
Second the GHR needs to be updated speculatively as the branch is predicted. This is important so that back to back branches' GHRs are not the same. The must be different to avoid aliasing. Speculation of the GHR update allows them to be different. On mis prediction the GHR must be reverted.
This implementation is a bit sloppy with names and now the GHR recovery is performed. Updates to follow.
2021-05-27 23:06:28 -05:00
Ross Thompson
65632cb7c9
Fixed minor bug in instruction class decoding.
2021-05-24 13:41:14 -05:00
