Ross Thompson
d0ed6e250a
Fixed LRSC in 64bit version. 32bit version is broken.
2021-07-17 20:58:49 -05:00
David Harris
c29a2ff8df
Started atomics
2021-07-17 21:11:41 -04:00
David Harris
d441d4270c
LSU cleanup
2021-07-17 20:01:03 -04:00
David Harris
f21582906f
Pushing HPTWPAdrM flop into LSUArb
2021-07-17 19:39:18 -04:00
David Harris
6f73844427
Continued Translation Address Cleanup
2021-07-17 19:09:13 -04:00
David Harris
2e2e948023
Refining address interface between HPTW and LSU
2021-07-17 19:02:18 -04:00
David Harris
49ec45d04d
hptw: Removed NonBusTrapM from LSU
2021-07-17 15:22:24 -04:00
David Harris
bf56000f4e
hptw: Propagating PageTableEntryF removal through LSU
2021-07-17 15:01:01 -04:00
David Harris
d6b8a5e595
hptw: Unified PageTableEntryM and PageTableEntryF outputs of pagetablewalker into PTE
2021-07-17 14:48:44 -04:00
David Harris
9741b01465
hptw: minor cleanup
2021-07-17 13:40:12 -04:00
David Harris
fe8910437a
Replaced separate PageTypeF and PageTypeM with common PageType
2021-07-17 02:31:23 -04:00
Ross Thompson
e9649eb1f5
Made furture progress in the mmu tests.
2021-07-16 15:56:06 -05:00
Ross Thompson
abce241f68
Also changed the shadow ram's dcache copy widths.
...
Merge branch 'dcache' into main
2021-07-16 14:21:09 -05:00
Ross Thompson
d3715acf2d
Fixed walker fault interaction with dcache.
2021-07-16 12:22:13 -05:00
Ross Thompson
5ca7dc619c
Updated the ptw, lsuarb and dcache to hopefully solve the interlock issues.
2021-07-16 11:12:57 -05:00
Ross Thompson
96aa106852
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
4549a9f1c9
Merge branch 'main' into dcache
2021-07-15 11:55:20 -05:00
Ross Thompson
c954fb510b
Renamed DCacheStall to LSUStall in hart and hazard.
...
Added missing logic in lsu.
2021-07-15 10:16:16 -05:00
Ross Thompson
6163629204
Finally have the ptw correctly walking through the dcache to update the itlb.
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Still not working fully.
2021-07-14 22:26:07 -05:00
Ross Thompson
d3a1a2c90a
Fixed d cache not honoring StallW for uncache writes and reads.
2021-07-14 17:23:28 -05:00
Ross Thompson
771c7ff130
Routed CommittedM and PendingInterruptM through the lsu arb.
2021-07-14 16:18:09 -05:00
Ross Thompson
e17de4eb11
Separated interruptM into PendingInterruptM and InterruptM. The d cache now takes in both exceptions and PendingInterrupts.
...
This solves the committedM issue.
2021-07-14 15:00:33 -05:00
Ross Thompson
b6e5670bc3
Added CommitedM to data cache output.
2021-07-13 22:43:42 -05:00
Ross Thompson
278bbfbe3c
Partially working changes to support uncached memory access. Not sure what CommitedM is.
2021-07-13 17:24:59 -05:00
Ross Thompson
ee09fa5f58
Moved StoreStall into the hazard unit instead of in the d cache.
2021-07-13 13:20:50 -05:00
Ross Thompson
2004b2e044
Fixed back to back store issue.
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Note there is a bug in the lsuarb which needs to arbitrate a few execution stage signals.
2021-07-13 12:46:20 -05:00
Ross Thompson
94b29ec418
Loads in modelsim, but the first store double does not function correctly. The write address is wrong so the cache is updated using the wrong address.
...
I think this is do to the cycle latency of stores. We probably need extra muxes to select between MemPAdrM and MemPAdrW depending on if the write is a
full cache block or a word write from the CPU.
2021-07-09 17:14:54 -05:00
Ross Thompson
6abd23a61d
Lint passes, but I only hope to have loads working. Stores, lr/sc, atomic, are not fully implemented.
...
Also faults and the dcache ptw interlock are not implemented.
2021-07-09 15:16:38 -05:00
Ross Thompson
2efb7a4f81
Renamed signal in LSU toLSU and fromLSU to toDCache and fromDCache.
2021-07-08 18:03:52 -05:00
David Harris
78850bfcd8
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
d85bf23af3
Merged several of the load/store/instruction access faults inside the mmu.
...
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
Ross Thompson
71a23626d5
Fixed bug in the LSU pagetable walker interlock.
2021-07-06 10:41:36 -05:00
David Harris
69c0358ffd
Created tlbcontrol module to hide details
2021-07-06 03:25:11 -04:00
David Harris
39fa84efdd
Renamed Funct3ToLSU/fromLSU -> SizeToLSU/FromLSU and simplified size muxing in lsuArb
2021-07-04 18:56:30 -04:00
David Harris
595df47a3e
Fixed TLB_ENTRIES merge conflict and handling of global PTEs
2021-07-04 18:05:22 -04:00
David Harris
71268cc0e8
Added ASID & Global PTE handling to TLB CAM
2021-07-04 17:53:08 -04:00
David Harris
6b9cfe90d8
Added ASID & Global PTE handling to TLB CAM
2021-07-04 17:52:00 -04:00
Ross Thompson
8e48865140
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-07-04 16:19:39 -05:00
Ross Thompson
8ae0a5bd7d
relocated lsuarb and pagetable walker inside the lsu. Does not pass busybear or buildroot, but passes rv32ic and rv64ic.
2021-07-04 13:49:38 -05:00
David Harris
a5c0dc8c81
Fixed MPRV and MXR checks in TLB
2021-07-04 13:20:29 -04:00
David Harris
b5df9b282d
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
Ross Thompson
fd088f8ecd
Added explicit names to lsu, lsuarb and pagetable walker to make the code refactoring process eaiser.
2021-07-03 15:51:25 -05:00
Ross Thompson
46831035fb
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-07-02 13:56:49 -05:00
David Harris
648c09e5ef
Optimized PMP checker logic and added support for configurable number of PMP registers
2021-07-02 11:04:13 -04:00
Ross Thompson
c3eaa3169e
Fixed the wrong virtual address write into the dtlb.
2021-07-01 16:55:16 -05:00
Ross Thompson
9d9415ea67
Got some stores working in virtual memory.
2021-07-01 12:49:09 -05:00
Ross Thompson
07a0b66fdf
Major rewrite of ptw to remove combo loop.
2021-06-30 16:25:03 -05:00
Ross Thompson
ae6140bd94
Don't use this branch walker still broken.
2021-06-28 17:26:11 -05:00
Ross Thompson
8dfbf60b67
AMO and LR/SC instructions now working correctly.
...
Page table walking is not working.
2021-06-25 15:42:07 -05:00
Ross Thompson
a4266c0136
Some progress. Had to change how the page table walker got it's ready.
2021-06-25 15:07:41 -05:00
