Ross Thompson
89e22bc5e8
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-07-22 10:38:24 -05:00
Ross Thompson
e907d57340
Tested all numbers of ways for dcache 1, 2, 4, and 8.
2021-07-22 10:38:07 -05:00
bbracker
9dcd5d3622
fix UART RX FIFO bug where tail pointer can overtake head pointer
2021-07-22 02:09:41 -04:00
bbracker
cdcf419147
make address translator signals visible in waveview
2021-07-21 20:07:49 -04:00
Ross Thompson
511c36fb1b
Improved address bus names and usages in the walker, dcache, and tlbs.
...
Merge branch 'walkerEnhance' into main
2021-07-21 14:55:09 -05:00
Ross Thompson
39fc9278ba
Fixed remaining bugs in 2 way set associative dcache.
2021-07-21 10:35:23 -05:00
Ross Thompson
8d0a552b5b
Partially working 2 way set associative d cache.
2021-07-20 17:51:42 -05:00
bbracker
bb2e3b1e02
remove busybear from regression because it is not keeping up with buildroot's changes to testbench-linux
2021-07-19 16:22:05 -04:00
bbracker
77b690faf0
make testbench check the same CSRs that QEMU logs; change CLINT to reset MTIMECMP to -1 so that we don't instantly get a timer interrupt upon reset
2021-07-19 15:13:03 -04:00
Ross Thompson
5754b5f25f
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-07-19 12:32:35 -05:00
Ross Thompson
2ee97efb9c
Fixed a complex bug in the dcache, where back to back loads would lose data on the load before a stall occurred. The solution was to modify the logic for SelAdrM in the dcache so that a stall would cause the SRAM to reread the address in the Memory stage rather than Execution stage. This also required updating the ReadDataWEn control so it is always enabled on ~StallW.
2021-07-19 12:32:16 -05:00
bbracker
2702064dda
change buildroot expectations to match reality
2021-07-19 13:20:53 -04:00
Ross Thompson
6ccbdc372d
Broken.
...
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
bbracker
64a81941ff
change memread testvectors to not left-shift bytes and half-words
2021-07-18 21:49:53 -04:00
bbracker
f4f3ef0307
linux testbench progress
2021-07-18 18:47:40 -04:00
Katherine Parry
3527620c0b
fdivsqrt inegrated, but not completley working
2021-07-18 14:03:37 -04:00
bbracker
d85da77069
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2021-07-17 14:46:38 -04:00
bbracker
ac908bc2e4
swapped out linux testbench signal names
2021-07-17 14:46:18 -04:00
David Harris
9741b01465
hptw: minor cleanup
2021-07-17 13:40:12 -04:00
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
bebc7cc5e3
Updated wave file.
2021-07-16 12:34:37 -05:00
Ross Thompson
d3715acf2d
Fixed walker fault interaction with dcache.
2021-07-16 12:22:13 -05:00
bbracker
d38109bc1c
changed stop of linux boot from arch_cpu_idle to do_idle
2021-07-16 12:27:15 -04:00
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
5fb5ac3d5a
Updated wave file.
2021-07-15 11:04:49 -05:00
Ross Thompson
f234875779
dcache STATE_CPU_BUSY needs to assert CommittedM. This is required to ensure a completed memory operation is not bound to an interrupt. ie. MEPC should not be PCM when committed.
2021-07-14 23:08:07 -05:00
Ross Thompson
6163629204
Finally have the ptw correctly walking through the dcache to update the itlb.
...
Still not working fully.
2021-07-14 22:26:07 -05:00
Katherine Parry
701ea38964
Fixed lint warning
2021-07-14 21:24:48 -04:00
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
ef598d0e79
Implemented uncached reads.
2021-07-13 23:03:09 -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
b780e471b4
Fixed interaction between icache stall and dcache. On hit dcache needs to enter a cpu busy state when the cpu is stalled.
2021-07-13 14:51:42 -05:00
Ross Thompson
51249a0e04
Fixed the fetch buffer accidental overwrite on eviction.
2021-07-13 14:21:29 -05:00
Ross Thompson
2034a6584f
Dcache AHB address generation was wrong. Needed to zero the offset.
2021-07-13 14:19:04 -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
David Harris
516b710db6
Fixed busybear by restoring InstrValidW needed by testbench
2021-07-13 14:17:36 -04:00
Katherine Parry
acdd2e4504
Fixed writting MStatus FS bits
2021-07-13 13:20:30 -04:00
Ross Thompson
17dc488010
Got the shadow ram cache flush working.
2021-07-13 10:03:47 -05:00
Ross Thompson
9fe6190763
Team work on solving the dcache data inconsistency problem.
2021-07-12 23:46:32 -05:00
Ross Thompson
8ca8b9075d
Progress towards the test bench flush.
2021-07-12 14:22:13 -05:00
Katherine Parry
0cc07fda1b
Almost all convert instructions pass Imperas tests
2021-07-11 18:06:33 -04:00
Ross Thompson
a82c4c99c2
Actually writes the correct data now on stores.
2021-07-10 17:48:47 -05:00
Ross Thompson
71a23626d5
Fixed bug in the LSU pagetable walker interlock.
2021-07-06 10:41:36 -05:00
Ross Thompson
59913e13aa
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-07-05 16:07:27 -05:00
David Harris
e65fb5bb35
Added F_SUPPORTED flag to disable floating point unit when not in MISA
2021-07-05 10:30:46 -04:00
Ross Thompson
f2c4df0a5b
Removed the TranslationVAdrQ as it is not necessary.
2021-07-04 16:49:34 -05:00
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
