Ross Thompson
b61dad4b83
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
f31a0ded75
change buildroot expectations to match reality
2021-07-19 13:20:53 -04:00
Ross Thompson
4d53b9002f
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
e4a50a5bb8
change memread testvectors to not left-shift bytes and half-words
2021-07-18 21:49:53 -04:00
bbracker
5e9dcb3f1c
linux testbench progress
2021-07-18 18:47:40 -04:00
Katherine Parry
60dabb9094
fdivsqrt inegrated, but not completley working
2021-07-18 14:03:37 -04:00
bbracker
18fb282a37
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2021-07-17 14:46:38 -04:00
bbracker
4a3503281f
swapped out linux testbench signal names
2021-07-17 14:46:18 -04:00
David Harris
87aa527de7
hptw: minor cleanup
2021-07-17 13:40:12 -04:00
Ross Thompson
6521d2b468
Also changed the shadow ram's dcache copy widths.
...
Merge branch 'dcache' into main
2021-07-16 14:21:09 -05:00
Ross Thompson
b3bf04d474
Updated wave file.
2021-07-16 12:34:37 -05:00
Ross Thompson
46bce70e42
Fixed walker fault interaction with dcache.
2021-07-16 12:22:13 -05:00
bbracker
01ca22af49
changed stop of linux boot from arch_cpu_idle to do_idle
2021-07-16 12:27:15 -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
fd1de6b047
Updated wave file.
2021-07-15 11:04:49 -05:00
Ross Thompson
704f4f724e
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
ba1e1ec231
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
c74d26eea4
Fixed lint warning
2021-07-14 21:24:48 -04:00
Ross Thompson
2c946a282f
Fixed d cache not honoring StallW for uncache writes and reads.
2021-07-14 17:23:28 -05:00
Ross Thompson
e91501985c
Routed CommittedM and PendingInterruptM through the lsu arb.
2021-07-14 16:18:09 -05:00
Ross Thompson
9b756d6a94
Implemented uncached reads.
2021-07-13 23:03:09 -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
baa2b5d15f
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
3c1a717399
Fixed the fetch buffer accidental overwrite on eviction.
2021-07-13 14:21:29 -05:00
Ross Thompson
32f27cfecf
Dcache AHB address generation was wrong. Needed to zero the offset.
2021-07-13 14:19:04 -05:00
Ross Thompson
afc1bc9c38
Moved StoreStall into the hazard unit instead of in the d cache.
2021-07-13 13:20:50 -05:00
David Harris
9de97c1e20
Fixed busybear by restoring InstrValidW needed by testbench
2021-07-13 14:17:36 -04:00
Katherine Parry
efdec72df1
Fixed writting MStatus FS bits
2021-07-13 13:20:30 -04:00
Ross Thompson
e594eb540d
Got the shadow ram cache flush working.
2021-07-13 10:03:47 -05:00
Ross Thompson
49f6eec579
Team work on solving the dcache data inconsistency problem.
2021-07-12 23:46:32 -05:00
Ross Thompson
1cc258ade1
Progress towards the test bench flush.
2021-07-12 14:22:13 -05:00
Katherine Parry
36f59f3c99
Almost all convert instructions pass Imperas tests
2021-07-11 18:06:33 -04:00
Ross Thompson
60ed023734
Actually writes the correct data now on stores.
2021-07-10 17:48:47 -05:00
Ross Thompson
6e7e318396
Fixed bug in the LSU pagetable walker interlock.
2021-07-06 10:41:36 -05:00
Ross Thompson
2a62ee2e70
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-07-05 16:07:27 -05:00
David Harris
5f91b339aa
Added F_SUPPORTED flag to disable floating point unit when not in MISA
2021-07-05 10:30:46 -04:00
Ross Thompson
a252416535
Removed the TranslationVAdrQ as it is not necessary.
2021-07-04 16:49:34 -05:00
Ross Thompson
7f62808544
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-07-04 16:19:39 -05:00
Ross Thompson
5b70eb86b0
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
9645b023c9
Moved BOOTTIM to 0x1000-0x1FFF. Added logic to detect an access to undefined memory and assert HREADY so bus doesn't hang.
2021-07-04 01:19:38 -04:00
Ben Bracker
59b177beac
stop busybear from hanging
2021-07-02 17:22:09 -05:00
Ross Thompson
dbd33465e1
Merge branch 'main' into bigbadbranch
2021-07-02 11:52:26 -05:00
Ross Thompson
61027f650c
OMG. It's working!
2021-07-01 17:37:53 -05:00
Ross Thompson
2dc349ea6f
Fixed the wrong virtual address write into the dtlb.
2021-07-01 16:55:16 -05:00
Ross Thompson
88a18496cf
Got some stores working in virtual memory.
2021-07-01 12:49:09 -05:00
Ross Thompson
002c32d2ad
The icache ptw interlock is actually correct now. There needed to be a 1 cycle delay.
2021-06-30 17:02:36 -05:00
Ross Thompson
9ec624702d
Major rewrite of ptw to remove combo loop.
2021-06-30 16:25:03 -05:00
Ross Thompson
b2d8ba6742
The icache now correctly interlocks with the PTW on TLB miss.
2021-06-30 11:24:26 -05:00
Ross Thompson
dd84f2958e
Page table walker now walks the table.
...
Added interlock so the icache stalls.
Page table walker not walking correctly, goes to fault state.
2021-06-29 22:33:57 -05:00
Ross Thompson
bc9c944ba0
Don't use this branch walker still broken.
2021-06-28 17:26:11 -05:00
Ross Thompson
d80ebab941
AMO and LR/SC instructions now working correctly.
...
Page table walking is not working.
2021-06-25 15:42:07 -05:00
Ross Thompson
b4a788c341
Working through a combo loop.
2021-06-25 14:49:27 -05:00
Ross Thompson
d6c19e73f4
Regression test runs further. The LSU state machine which fakes the Dcache had a few bugs. MemAccessM needed to be squashed on bus faults.
2021-06-25 11:05:17 -05:00
bbracker
13cf7c0934
linux testbench now ignores HWRITE glitches caused by flush glitches
2021-06-25 09:28:52 -04:00
Ross Thompson
6bab454b17
Works until pma checker breaks the simulation by reading HADDR rather than data physical address.
2021-06-24 14:42:59 -05:00
bbracker
53d545cdfe
regression can overcome the fact that buildroots UART prints stuff
2021-06-24 02:00:01 -04:00
bbracker
cee468b21a
whoops meant to remove notifications from busybear, not buildroot
2021-06-24 01:54:46 -04:00
bbracker
be962cb1ff
overhauled linux testbench and spoofed MTTIME interrupt
2021-06-24 01:42:35 -04:00
David Harris
a514554eeb
Reduced complexity of pmpadrdec
2021-06-23 03:03:52 -04:00
bbracker
9b27cd6fb7
added slack notifier for long sims
2021-06-22 08:31:41 -04:00
bbracker
2643130c41
read from MSTATUS workaround because QEMU has incorrect MSTATUS
2021-06-20 10:11:39 -04:00
bbracker
dc26f2a6d0
whoops wavedo typo
2021-06-20 05:36:54 -04:00
bbracker
c77aabdc6f
make buildroot ignore SSTATUS because QEMU did not originally log it
2021-06-20 05:31:24 -04:00
bbracker
086f031b84
remove lingering busybear stuff from buildroot do files
2021-06-20 00:50:53 -04:00
bbracker
d62d9a7aac
make buildroot waves only turn on after a user-specified point
2021-06-20 00:39:30 -04:00
David Harris
33312caeb1
Restored wally-busybear testbench now that graphical sim is working
2021-06-18 12:36:25 -04:00
bbracker
4f50dd575d
buildroot added to regression because it passes regression
2021-06-18 09:49:30 -04:00
David Harris
336936cc39
Cleaned up name of MTIME register in CSRC
2021-06-18 07:53:49 -04:00
bbracker
5b96f7fbd7
making linux waveforms more useful
2021-06-17 08:37:37 -04:00
bbracker
28c6d60150
temporarily removing buildroot from regression until it is regenerated
2021-06-07 13:20:50 -04:00
David Harris
dc0b19dfaa
Merge difficulties
2021-06-07 09:50:23 -04:00
David Harris
d5ec797ba4
Refactored configuration files and renamed testbench-busybear to testbench-linux
2021-06-07 09:46:52 -04:00
Ross Thompson
41a1e6112a
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-06-04 15:16:39 -05:00
Ross Thompson
7406e33b61
Continued I-Cache cleanup.
...
Removed strange mux on InstrRawD along with
the select logic.
2021-06-04 15:14:05 -05:00
Ross Thompson
191f7e61fd
Moved I-Cache offset selection mux to icache.sv (top level).
...
When we switch to set associative this is will be more efficient.
2021-06-04 13:49:33 -05:00
Katherine Parry
fc65aedbd6
Double-precision FMA instructions
2021-06-04 14:00:11 -04:00
Ross Thompson
fdef8df76b
Reorganized the icache names.
2021-06-04 12:53:42 -05:00
David Harris
0674f5506e
moved shared constants to a shared directory
2021-06-03 22:41:30 -04:00
bbracker
4e765ee1c5
expanded GPIO testing and caught small GPIO bug
2021-06-03 10:03:09 -04:00
bbracker
2c77a13c08
fixed InstrValid signals and implemented less costly MEPC loading
2021-06-02 10:03:19 -04:00
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
bbracker
846553ac7d
improved PLIC test organization
2021-05-21 15:13:02 -04:00
Katherine Parry
06af239e6c
FMV.D.X imperas test passes
2021-05-20 22:17:59 -04:00
bbracker
1d3db5ead5
small bit of busybear debug progress
2021-05-19 20:18:00 -04:00
James E. Stine
304e70d3ae
Update rv64icfd batch script
2021-05-18 16:01:53 -05:00
David Harris
5da159d17e
Removed rv64wally
2021-05-18 14:08:46 -04:00
David Harris
4d264c6f61
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
...
Conflicts:
wally-pipelined/regression/vish_stacktrace.vstf
2021-05-18 14:01:19 -04:00
bbracker
f00eb22700
fixed busybear floating point NOP-out feature; restored regression to check 100000 instructions
2021-05-17 19:25:54 -04:00
bbracker
e4c90f503a
regression modified to timeout after 10 min \n took Harris\' suggestion for avoiding using ahbliteState package in busybear testbench
2021-05-17 18:44:47 -04:00
David Harris
9901f54b15
Deleted vish_stacktrace
2021-05-17 18:39:01 -04:00
Elizabeth Hedenberg
b818ce608a
commit ehedenberg coremark
2021-05-17 18:02:35 -04:00
James E. Stine
3d3e3434f6
Cleanup of regression
2021-05-17 16:58:15 -05:00
James E. Stine
865b3ee219
Updates on Divide - pushed in working version of DIV64U for Divide and REmainder. Will do 32-bit version tomorrow as well as Signed version
2021-05-17 16:48:51 -05:00
Thomas Fleming
6aa04af38d
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-05-14 07:40:08 -04:00
Thomas Fleming
ea4e76938e
Remove busy-mmu and fix missing signal
2021-05-14 07:14:20 -04:00
Jarred Allen
041149eaf7
Minor fixes in regression
2021-05-09 13:57:09 -04:00
Jarred Allen
c7f400262c
Fix bug in regression script
2021-05-06 12:56:57 -04:00
Jarred Allen
be029ba02c
Clean up regression script and document it
2021-05-04 18:58:59 -04:00
Thomas Fleming
ad40464557
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-05-03 23:15:39 -04:00
