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1957 Commits

Author SHA1 Message Date
Ross Thompson
565585b35a Moved more muxes inside bp. 2022-12-19 22:51:55 -06:00
Ross Thompson
d8ee0ea59d Begin cleanup of ifu. partial move of pc muxes inside bp. 2022-12-19 22:46:11 -06:00
David Harris
e4579f3e9b Removed CSR support from rv32i 2022-12-19 16:15:12 -08:00
David Harris
9fea16fd20 Simplified InstrRawD register 2022-12-19 15:18:42 -08:00
David Harris
a4da3f30e1 Explained hazard causes 2022-12-19 09:41:41 -08:00
David Harris
67763dbeec Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main 2022-12-19 09:09:57 -08:00
David Harris
3172dfd6a9 Properly decode fcvtint to prevent unnecessary stalls 2022-12-19 09:09:48 -08:00
Ross Thompson
159eda85f0 Renamed FStallD to FPUStallD. 2022-12-19 09:28:45 -06:00
Alessandro Maiuolo
5a82898649 Added NumZeroE, AZeroM, and BZeroM 2022-12-18 20:02:40 -08:00
Alessandro Maiuolo
2989782fe6 fixed LOGRK. FIxed Xs in WC and WS from muxes reliant on SqrtE. note not linting on 4 copies radix 4 because IntBits only 7 bits wide (need 8) 2022-12-18 19:04:36 -08:00
Ross Thompson
4f56e6ff5d I think I finally fixed a long hidden bug in the replacement policy. The figures in the textbook are correct. There was small bug in the rtl. 2022-12-18 18:30:35 -06:00
Ross Thompson
376b01fcb8 Attempted to make a cache test. 2022-12-18 17:15:08 -06:00
Ross Thompson
ebdac1a9d0 Updated tests for fpga and BP. 2022-12-18 16:24:26 -06:00
Ross Thompson
73fd3fe040 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
cdeccd78e6 At long last found the subtle bug in the LRU. 
Since the LRU memory is two ports, 1 read and 1 write, a write in cycle 1 to address x should not
forward data to a read from address y in cycle 2.
A read form address x in cycle 2 would still require forwarding.
 2022-12-17 10:03:08 -06:00
Ross Thompson
ade06f3780 Fixed a bug with the new cache flush changes. 2022-12-16 19:28:32 -06:00
Ross Thompson
7d04675073 Cleanup comments. 2022-12-16 17:08:35 -06:00
Ross Thompson
89a30e7e37 Further cleanfsm cleanup. 2022-12-16 16:37:45 -06:00
Ross Thompson
9ebea891e2 More cachefsm cache flush cleanup. 2022-12-16 16:32:21 -06:00
Ross Thompson
731fbfc851 Oups found a bug with the new flush cache states. 2022-12-16 16:22:40 -06:00
Ross Thompson
41c636ecfa Merge branch 'main' of github.com:davidharrishmc/riscv-wally 2022-12-16 15:37:03 -06:00
Ross Thompson
b462554896 Cleanup of cache flush fsm enhancement. 2022-12-16 15:36:53 -06:00
Ross Thompson
dacba855da Rough draft of cache flush fsm enhancement. 2022-12-16 15:28:22 -06:00
cturek
4b8cbd9fa0 Added integer support for initC 2022-12-16 19:02:11 +00:00
Ross Thompson
bc907f3e2f Merge branch 'main' of github.com:davidharrishmc/riscv-wally 2022-12-16 12:52:22 -06:00
Ross Thompson
e425ecac96 Fixed regression-wally to correct remove and mkdir wkdir. 2022-12-16 12:51:21 -06:00
cturek
06c58f310d Added mux for integer special case, renamed signals to match pipelined stage 2022-12-16 18:43:49 +00:00
David Harris
378c40002f Clean up interrupt masking by Commit 2022-12-16 08:27:39 -08:00
David Harris
7989f449ad Disabled starting FPU divider when IDIV_ON_FPU = 0 2022-12-16 06:35:29 -08:00
cturek
d7571bb9b1 Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally 2022-12-16 03:41:39 +00:00
David Harris
b7abc0037e Use FlushE to reset integer divider FSM 2022-12-15 11:00:54 -08:00
David Harris
4365c99b52 Refactored stalls and flushes, including FDIV flush with FlushE 2022-12-15 10:56:18 -08:00
David Harris
5b040b7935 Regression delete wkdir files to prevent spurious failures 2022-12-15 10:24:58 -08:00
David Harris
2457448e29 Renamed DIV_BITSPERCYCLE to IDIV_BITSPERCYCLE 2022-12-15 08:23:34 -08:00
Ross Thompson
fa19a111c6 Hazard cleanup. 2022-12-15 10:05:17 -06:00
Ross Thompson
e774dd2db9 Reworked the hazards to eliminate StallFCause. Flush and CSRWrites now flush F,D,E stages and set the correct PCNextF in the M stage. 2022-12-15 09:53:35 -06:00
Ross Thompson
b02550b05c Merge branch 'main' into hazards 2022-12-15 08:44:59 -06:00
David Harris
33aca5d35e Added IDIV_ON_FPU flag to control whether integer division uses FPU 2022-12-15 06:37:55 -08:00
David Harris
5f637ef4a7 Use FPU divider for integer division when F is supported 2022-12-14 17:03:13 -08:00
cturek
8829e627eb Fixed BZero and initU/initUM muxes 2022-12-14 16:44:46 +00:00
Ross Thompson
09dcb56217 Signal renames to reflect figures. 2022-12-14 09:49:15 -06:00
Ross Thompson
a3ec829b80 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-12-14 09:34:34 -06:00
Ross Thompson
6da7849d27 Reduced complexity of linebytemask. 2022-12-14 09:34:29 -06:00
cturek
ed59736a4b Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally 2022-12-14 15:13:44 +00:00
Ross Thompson
1ba1bed0b0 Broken dont' use. 2022-12-11 23:24:01 -06:00
Ross Thompson
0716aedbd5 Removed unused flushf. 2022-12-11 16:28:11 -06:00
Ross Thompson
115e9e7bb3 Renamed CPUBusy to GatedStallF in IFU. 2022-12-11 15:54:19 -06:00
Ross Thompson
ffc5bce0b6 Renamed CPUBusy in LSU. 2022-12-11 15:52:51 -06:00
Ross Thompson
c50a2bd8bf Changed CPUBusy to Stall in ebu modules. 2022-12-11 15:51:35 -06:00
Ross Thompson
3ddf509f28 Renamed CPUBusy to Stall in cache. 2022-12-11 15:49:34 -06:00
Ross Thompson
4aadd87679 Moved CPUBusy out of HPTW. 2022-12-11 15:48:00 -06:00
cturek
f57211bb49 Fixed D sizing issues across fdivsqrt. Fixed preproc to accept either int or float inputs 2022-12-10 21:56:35 +00:00
Ross Thompson
d15cf5c65c Added comments about why it is not possible to use FlushWay and VictimWay directly. 2022-12-09 17:07:35 -06:00
Ross Thompson
1463e9b1d4 Finished merge of kip and ross's ifu fix. 2022-12-09 16:52:22 -06:00
Ross Thompson
6f01ea12e8 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-12-09 16:42:16 -06:00
Ross Thompson
38adcb5b17 Minor simplification of cacheway way selection muxes. 2022-12-09 16:42:05 -06:00
Kip Macsai-Goren
f486a763d9 Addded fix for 32 bit periph test and added test to regression 2022-12-06 09:56:08 -08:00
Ross Thompson
033f844d09 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-12-06 10:38:14 -06:00
Ross Thompson
9ee2d84c7c Fixed bug Kip found. 
The no cache and no bus versions lacked assignment of CacheCommittedF in the IFU.
 2022-12-06 10:37:45 -06:00
Kip Macsai-Goren
2dfa426e10 added passing GPIO test to 64 bit tests 2022-12-05 21:31:00 -08:00
Kip Macsai-Goren
c6c0ef05db commented out periph test from wally32 periph so rv32ic doesn't hang 2022-12-05 20:23:16 -08:00
Kip Macsai-Goren
ae32e2a9ee added passing tests to regression 2022-12-05 20:16:02 -08:00
Kip Macsai-Goren
282d06b45f added -01 to all WALLY tests 2022-12-05 20:16:02 -08:00
Ross Thompson
9806babe9e Renamed SelBusBuffer to SelFetchBuffer. 2022-12-05 17:51:13 -06:00
Ross Thompson
0fdbfb87eb Removed commented code. 2022-12-05 17:21:56 -06:00
Ross Thompson
bcb927d172 Renamed VictimTag to just Tag. Tag is used for both the victim and flush tags. 2022-12-05 17:19:51 -06:00
Ross Thompson
2bcaacb179 Cache signal renames. 2022-12-04 16:09:09 -06:00
Ross Thompson
b84b709182 Optimized way selection logic. 2022-12-04 12:30:56 -06:00
Ross Thompson
74d5ccc2b1 Found possible optimization as the way selection is shared in cache, cacheway, and cachelru. 2022-12-04 01:20:51 -06:00
Ross Thompson
62e495c739 Moved selectedway mux into cacheway. It makes way more sense there. 2022-12-04 01:15:47 -06:00
Ross Thompson
e1ac736d43 Rename LineByteMux to FetchbufferbyteSel. 2022-12-04 01:00:04 -06:00
Ross Thompson
128b3d20e7 Updated riscv arch test removed misaligned1. 2022-12-04 00:18:10 +00:00
Ross Thompson
de99663b97 Revert "Changed weird D sizing. Better names in preproc. Finalized Int/Float input to divider." 
This reverts commit 70b89e5214.
 2022-12-04 00:01:58 +00:00
cturek
70b89e5214 Changed weird D sizing. Better names in preproc. Finalized Int/Float input to divider. 2022-12-02 21:44:29 +00:00
cturek
1f32603c30 Added flops to preproc 2022-12-02 20:31:08 +00:00
David Harris
9395414df3 Renamed FPUStallD to FCvtIntStallD 2022-12-02 11:55:23 -08:00
David Harris
d64cd715f9 Renamed DivStartE to IFDivStartE 2022-12-02 11:30:49 -08:00
David Harris
9c1b7e53e4 FPU divider working with execute stage stall 2022-12-02 11:11:53 -08:00
David Harris
01028e7088 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-12-02 04:28:50 -08:00
David Harris
4c6003d9e2 update test list 2022-12-02 04:28:47 -08:00
Ross Thompson
33e4361de5 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-12-01 22:36:07 -06:00
David Harris
8afc054e74 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-12-01 16:27:36 -08:00
David Harris
ed39099405 reorder tests 2022-12-01 16:27:33 -08:00
Ross Thompson
1d9b5badee Properly flush cacheLRU. 2022-12-01 17:32:58 -06:00
David Harris
f64c0589fe FPU test list 2022-12-01 10:18:36 -08:00
Ross Thompson
da92cdccd0 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-12-01 11:47:54 -06:00
Ross Thompson
cb310bfb1d Removed unused port on cacheway. 2022-12-01 11:47:48 -06:00
David Harris
558f0b655e Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-12-01 08:15:51 -08:00
David Harris
4e5f62a5c1 code cleanup 2022-12-01 08:15:48 -08:00
Ross Thompson
b0b16acaf5 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-30 17:19:04 -06:00
David Harris
aa26a97b36 signal sufixes in integer division 2022-11-30 15:15:37 -08:00
Ross Thompson
f9ffcf377b Reverted the IROM/DTIM address range modelsim assignment. 2022-11-30 17:13:33 -06:00
Ross Thompson
bfd238a4fc Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-30 13:30:37 -06:00
Ross Thompson
813b2963fb More optimization. 2022-11-30 11:26:48 -06:00
Ross Thompson
da7b13ba0a Removed reset on dirty cache bits. 2022-11-30 11:04:37 -06:00
Ross Thompson
5e5cca6ae1 Turns out the merge of dirty and tag bits is complicated by the need to have byte write enables rather than bit write enables. Putting on hold for now. 2022-11-30 11:01:25 -06:00
Ross Thompson
ac3e02692b Preparing to merge dirty and tag srams. 2022-11-30 10:40:48 -06:00
Ross Thompson
8692ccbafb Intermediate commit. Replaced flip flop dirty bit array with sram. 2022-11-30 00:08:31 -06:00
cturek
e28a6901a9 div tests in sim-wally 2022-11-30 02:32:04 +00:00
Ross Thompson
e3577781b0 Optimization of cacheway. 2022-11-29 18:30:47 -06:00
Ross Thompson
1e2180ef98 Updated HPTW to route access faults generated by the HPTW to the original access type either instruction access fault, load access fault or store access fault. 2022-11-29 17:19:31 -06:00
Ross Thompson
5e550fe5e6 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-29 14:57:38 -06:00
Ross Thompson
9e4166407b Fixed a bug with the replacement policy. It was updating the wrong set on load hits. 2022-11-29 14:51:09 -06:00
Ross Thompson
179d321683 Cleaned up the wavefile and added logic to linearly populate the LRU before all ways are filled. 2022-11-29 14:09:48 -06:00
Kip Macsai-Goren
66fcb2bffe Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-29 10:43:44 -08:00
Kip Macsai-Goren
26b4147f40 added failing satp invalid tests to regression 2022-11-29 10:43:38 -08:00
Ross Thompson
ed54959378 Renamed signals in the cache. 2022-11-29 10:52:40 -06:00
Ross Thompson
4e52755c9f Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-22 18:07:32 -06:00
cturek
7140642c93 Almost done with Int division 2022-11-22 22:22:59 +00:00
cturek
3fbccbf119 Updated testbench/wave for fdivsqrt new start signals 2022-11-22 22:22:26 +00:00
Ross Thompson
1736983557 Cleanup cacheLRU. 2022-11-22 14:59:01 -06:00
Ross Thompson
2ae7b555be File name change for cachereplacement policy to cacheLRU 2022-11-20 22:35:02 -06:00
Ross Thompson
84679c0062 Signal name changes for LRU. 2022-11-20 22:31:36 -06:00
Ross Thompson
736a30afac Missing a file. Last commit will fail. 2022-11-17 17:45:41 -06:00
Ross Thompson
a1f39a8186 Finally have the correct replacement policy implementation. 2022-11-17 17:36:37 -06:00
Ross Thompson
ac0f6ddb7b I found the issue with the cache changes. FlushW is not asserted for all TrapM. Ecall and Ebreak don't flush the W stage. However the ifu's bus controllable must disable the BusRW for all traps. 2022-11-16 15:38:37 -06:00
Ross Thompson
9b2236b2a0 Progress on the cache replacement policy implementation. 2022-11-16 15:35:34 -06:00
Ross Thompson
cf964e30fb Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-16 12:42:29 -06:00
Ross Thompson
5f7b0b8a9b Oups found a bug with my cache changes. I took TrapM out of the logic path for selecting the cache's address CAdr (previously RAdr) to improve the critical path. This is fine for the dcache because both the E and M stages are flushed. However for the ICache only F is flushed. PCNextF is valid and points to XTVEC so the cache must take NextAdr rather than PAdr as CAdr. 2022-11-16 12:36:58 -06:00
David Harris
bc3b783543 comment cleanup 2022-11-16 10:23:20 -08:00
David Harris
ddba68605e Renamed DivBusy to FDivBusyE in FPU 2022-11-16 10:13:27 -08:00
David Harris
e008d663f4 Moved DivStartE to fdivsqrtfsm 2022-11-16 10:00:07 -08:00
Ross Thompson
900a326a23 Created improved cache replacement policy implementation. This version is generic and works for any number of ways. Not fully tested and is currently commented out. 2022-11-16 11:15:34 -06:00
cturek
6fe35ee0e3 Attempt to fix FPGA synth errors 2022-11-15 20:34:28 +00:00
cturek
1c49d4a1c2 Fixed lint errors in postprocessing 2022-11-15 20:31:23 +00:00
Ross Thompson
ec6517fadd Fixed a bug with the hptw configuration not correctly avoiding UPDATE_PTE state. 2022-11-14 16:02:20 -06:00
Ross Thompson
f03d5d3ac8 Renamed Flush to FlushStage in the cache. 2022-11-14 14:11:05 -06:00
Ross Thompson
1bf838fa6b Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-14 13:48:56 -06:00
David Harris
895ee3d773 Removed comment about nonexistent possible bug 2022-11-14 09:56:33 -08:00
David Harris
cae3e00751 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-14 09:52:24 -08:00
David Harris
79d416537a Removed comment about nonexistent possible bug 2022-11-14 09:52:21 -08:00
Ross Thompson
1a00e7bbee Changed names of cache signals. 2022-11-13 21:36:12 -06:00
Ross Thompson
5800dfde60 Updated wave file. 2022-11-13 21:34:45 -06:00
cturek
0b2c8b9d46 Added majority of combinational logic 2022-11-14 00:06:38 +00:00
cturek
74f58b5d89 Added Quotient/Remainder calcs to normal termination 2022-11-13 23:44:34 +00:00
cturek
b3bfdbad18 Added flops for n and m, added B=0 signal 2022-11-13 23:02:43 +00:00
cturek
9c70ab917c Added A<B signal to fdivsqrt, started postprocessing merge 2022-11-13 22:40:26 +00:00
Ross Thompson
a27b81ef90 Changed IMWriteDataM to IHWriteDataM. 2022-11-13 12:27:48 -06:00
Ross Thompson
3ac6514856 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 
hazard was not a straight forward merge.  I changed the way the LSU and IFU generate IFUStallF and LSUStallM.  They need to be suppressed by TrapM now.
 2022-11-13 12:25:22 -06:00
David Harris
0ce3cc393a Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-13 04:23:26 -08:00
David Harris
157f816cd3 HPTW cleanup 2022-11-13 04:23:23 -08:00
David Harris
0502b8ea4d Comments about division hazards 2022-11-13 04:17:37 -08:00
Ross Thompson
90697ef888 Moved all remaining bus logic from the LSU into ahbcacheinterface. 2022-11-11 14:30:32 -06:00
cturek
ff410cd849 Added integer step counter to fsm 2022-11-11 00:23:25 +00:00
Ross Thompson
c2e3bad3f5 Fixed name change in hptw. 2022-11-10 16:13:31 -06:00
Ross Thompson
7311eca5ff Wavefile update. 2022-11-10 15:48:06 -06:00
Ross Thompson
64b818c49a Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-10 15:46:25 -06:00
Ross Thompson
31d5eabd77 Renamed Word to Beat for ahbcacheinterface. 2022-11-09 17:52:50 -06:00
Ross Thompson
3653d6b3ed Renamed CACHE_EVICT to CACHE_WRITEBACK. 2022-11-09 17:43:06 -06:00
cturek
d5c5450f8d Reoredered tests for arch32m 2022-11-09 18:42:00 +00:00
cturek
e7c25f9562 Fixed asign and bsign 2022-11-09 18:41:26 +00:00
Ross Thompson
42c0a10d07 Removed TrapM from the LSU and IFU. TrapM is replaced with FlushW for both. (Don't like this for the IFU). 
FlushW prevents writting the cache, dtim, and bus state.  FlushW still gates HTRANS.
FlushW does not impact the mealy outputs of the cache and bus FSMs and hazard is updated to
not stall W if we get a trap.
 2022-11-07 15:50:55 -06:00
David Harris
9b20bf341e Moved lsuvirtmem muxes into hptw 2022-11-07 11:13:34 -08:00
Ross Thompson
922513c22f Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-07 09:10:51 -06:00
cturek
b137a95a35 propagated otfc swap to Rad2 and 4 qslc 2022-11-06 23:32:38 +00:00
Ross Thompson
8d57e488c8 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-06 17:22:25 -06:00
cturek
1e927df1a0 Added conditional OTFC swap for simplified int postprocessing 2022-11-06 23:09:09 +00:00
cturek
56b7bb3590 Finished Int Preprocessinggit add ../src/fpu/fdivsqrt/fdivsqrtpreproc.sv 2022-11-06 22:40:21 +00:00
cturek
ee048325cb Added n and rightshiftx 2022-11-06 22:31:48 +00:00
cturek
67f2cb0595 p calculation 2022-11-06 22:24:21 +00:00
cturek
7567f388c2 Changed lzc names, started int/fp size merge in preproc 2022-11-06 22:21:35 +00:00
cturek
333da5c945 Added n, p, and m signals between fdivsqrt submodules. Added w64 and mdue to divsqrt testbench. 2022-11-06 22:08:18 +00:00
cturek
b893d9249d Added new macros for int div preprocessing, added p, n, and rightshiftx logic 2022-11-06 21:53:48 +00:00
David Harris
c78643f4e4 Reorder embench tests to prevent crash 2022-11-04 15:21:51 -07:00
David Harris
e57083a0ef HPTW cleanup 2022-11-04 15:21:09 -07:00
Ross Thompson
977ad1c33c Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-11-04 13:30:08 -05:00
cturek
39bf6a456e renamed remOp to RemOp 2022-11-03 22:37:25 +00:00
cturek
890b26466f Added rem/div operation to postprocessor 2022-11-02 17:49:40 +00:00
Ross Thompson
98d4929c57 Reduced complexity of logic supressing cache operations. 2022-11-01 15:23:24 -05:00
cturek
2a45787b37 Added buffered signals for int/fp 2022-10-28 21:47:24 +00:00
cturek
2ae0a9bb5d Config Cleanup 2022-10-27 22:38:56 +00:00
Ross Thompson
03f68a4cf5 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-10-26 14:48:50 -05:00
Ross Thompson
36d9a00471 Fixed the uart transmit fifo overrun bug. 2022-10-26 14:48:09 -05:00
cturek
51fc4de0e1 small signal cleanup 2022-10-26 18:42:49 +00:00
cturek
544c142c4f abs for int inputs 2022-10-26 16:18:05 +00:00
cturek
e401d12889 Added signed division to fdivsqrt 2022-10-26 16:13:41 +00:00
cturek
a8a89f8dfc unbroke DIVb 2022-10-26 16:11:51 +00:00
cturek
8475de128b Config cleanup 2022-10-25 21:04:09 +00:00
Jacob Pease
ec0cede2f2 Added PLIC signals for debugging on FPGA. 2022-10-25 13:57:09 -05:00
cturek
94daa961b3 Started Integer Preprocessing 2022-10-25 17:48:43 +00:00
Ross Thompson
1510c2d92f Setup to run with both the vcu108 and vcu118 boards. Set the parameters in the Makefile. 2022-10-24 15:38:39 -05:00
Ross Thompson
cc605a1966 Bit width error. 2022-10-24 13:48:47 -05:00
Ross Thompson
270a83352f 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
54bd1fb806 Small cleanup of interlockfsm. 2022-10-22 16:29:51 -05:00
Ross Thompson
ae7a71c0f4 Created one off test to replicate the floating point forwarding hazard bug. 2022-10-22 16:29:12 -05:00
Ross Thompson
f9a04c13df comment updates. 2022-10-22 16:28:44 -05:00
Ross Thompson
78586c5a7a Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-10-22 16:27:30 -05:00
Ross Thompson
611ea6882d Changed FDivBusyE to stall the whole pipeline. Any instruction in the Executation which depended on the output of an instruction in the writeback stage would be lost if the back end of the pipelined advanced. The solution is to stall the whole pipeline. 2022-10-22 16:27:20 -05:00
Jacob Pease
1f207bcafb Extended rxfifotimeout count to actually be 4 characters long. 2022-10-20 17:35:49 -05:00
Ross Thompson
e5cae3bfa0 Moving interlockfsm changes to a temporary branch. 
reduced complexity of cache mux controls.
 2022-10-19 15:08:23 -05:00
Ross Thompson
5ad3ee6b54 Broken don't use this state. 2022-10-19 14:31:22 -05:00
Ross Thompson
de1e569ee9 Noted possible bug with endianness during hptw. 
Minor complexity reduction in interlockfsm.  I think there is a lot of room to simplify.
 2022-10-19 12:20:19 -05:00
Ross Thompson
a58179b1d6 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-10-19 10:42:31 -05:00
Ross Thompson
49a85c7f50 Sort of solved the bit width warning for dtim, irom ranges. 2022-10-19 10:42:19 -05:00
Ross Thompson
61f7bad739 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-10-18 15:06:09 -05:00
Ross Thompson
962ba5e4b8 Updated uart settings and fpga wave config. 2022-10-18 15:05:33 -05:00
Ross Thompson
a7ae593a68 Possible fix for interrupt during a floating point divide. 2022-10-18 15:04:21 -05:00
Ross Thompson
2c80c2b35f Merged cacheable with seluncachedadr. 2022-10-17 13:29:21 -05:00
David Harris
6ab6467777 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-10-14 17:33:36 -07:00
David Harris
1428081742 Removed unused FPU waves 2022-10-14 17:33:32 -07:00
amaiuolo
a0712d1456 Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally 2022-10-13 22:36:57 +00:00
amaiuolo
000117fcd4 added amaiuolo@hmc.edu 2022-10-13 22:36:52 +00:00
Ross Thompson
47915421c2 Fixed uncached read bug introduced by yesterday's changes. 2022-10-13 11:11:36 -05:00
Ross Thompson
fccaad7f3f Fixed LSU to correctly handle the difference between LLEN and AHBW. 2022-10-12 12:06:15 -05:00
Ross Thompson
12a6a9f83b Actually fixed the bus width issue coming out of the cache. 
The root cause is the ahb bus width can be different from LLEN.
If we switch the d-cache to outputing LLEN and on LLEN intervals, subword read needs to operate on LLEN as well.
Then the cache always outputs LLEN data which may need to be muxed down into 2 or more subwords if ABHW is smaller than LLEN.
 2022-10-12 11:33:10 -05:00
Kip Macsai-Goren
f711eb0bcf quick fix to endianness wapping 64 bit reads in 32 bit confgs 2022-10-11 23:08:02 +00:00
Ross Thompson
b2f71b8255 Modified LSU to support DTIM without CSRs. 2022-10-11 14:05:20 -05:00
Ross Thompson
a5c15fd801 Fixed first problem with the rv64i IROM. 2022-10-11 11:35:40 -05:00
Ross Thompson
403daecc8e Modified the do scripts to change the DTIM_RANGE and IROM_RANGE to large values from the defaults. 
The defaults are used for synthesis.
rv64i and rv32i: DTIM 2KiB, IROM 2KiB
rv32ic: DTIM 4KiB, IROM 16KiB
Regression tests require 8MiB or larger so modelsim overrides.
 2022-10-11 10:47:13 -05:00
David Harris
36c0e1d4e9 Removed imperas tests from rv32i/rv64i because the configs lack privileged support expected in the tests. Also cleaned up comment in LSU 2022-10-10 10:22:12 -07:00
David Harris
e4c5754b3a Made simple RV64 configuration be RV64i. Eliminated rv64ic and rv64fp. Fixed some bugs related to new width 2022-10-10 09:10:55 -07:00
David Harris
a5a922d048 Removed unnecessary configuration conditions from subwordread sign extension/NaN boxing 2022-10-10 07:12:37 -07:00
Ross Thompson
1bc5f88e4a Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-10-09 16:46:51 -05:00
Ross Thompson
b52f593ecb Reorganized the configs. 2022-10-09 16:46:48 -05:00
David Harris
6092ca757a New fdivsqrtqsel4cmp module based on comparators rather than table lookup 2022-10-09 04:47:44 -07:00
David Harris
dceb6f9034 Moved shift into divsqrt stage and cleaned up comments 2022-10-09 04:45:45 -07:00
David Harris
55e4911cf0 fdivsqrt code cleanup 2022-10-09 03:37:27 -07:00
Ross Thompson
382ccf74a5 Cleaned up the new muxes to select between IROM/ICACHE/BUS and DTIM/DCACHE/BUS. 2022-10-05 15:46:53 -05:00
Ross Thompson
62951ec653 Fixed wally32e. 2022-10-05 15:37:01 -05:00
Ross Thompson
2144343c4a Name clarifications. 2022-10-05 15:36:56 -05:00
Ross Thompson
2e578eb8d8 Fixed bug with combined dtim+bus. 2022-10-05 15:16:01 -05:00
Ross Thompson
b52ab91028 Possibly have working dtim + bus config. 2022-10-05 15:08:20 -05:00
Ross Thompson
8d01cf32fc Updated wavefile. 2022-10-05 14:55:40 -05:00
Ross Thompson
a0c5833d6d Fixed bug in EBU. 2022-10-05 14:51:12 -05:00
Ross Thompson
68aa1434b4 Modified the LSU and IFU to allow concurrent DTIM/DCACHE+BUS and IROM/ICACHE+BUS. 
Don't use this commit as the rv32i tests are not passing.
 2022-10-05 14:51:02 -05:00
Ross Thompson
20546857e6 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-10-05 14:03:44 -05:00
David Harris
f318daa605 Changed RV32i config to use DTIM and bus. Don't use this commit - it will break rv32i tests. 2022-10-05 11:46:52 -07:00
Ross Thompson
e6b36d0c02 Optimized the ebu's beat counting. 2022-10-05 10:58:23 -05:00
Ross Thompson
3f59ea6b6d Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-10-04 17:38:49 -05:00
Ross Thompson
92d7be645b Reordered the eviction and fetch in cache so it follows a more logical order. 2022-10-04 17:36:07 -05:00
Ross Thompson
52e8e0f5ef Modified cache lru to not have the delayed write. 2022-10-04 15:14:58 -05:00
Kip Macsai-Goren
d5cd67cf09 fixed endianness mstatush problem, passes make, not regression 2022-10-04 17:37:39 +00:00
Kip Macsai-Goren
2bbcec680f addded renamed file 2022-10-04 17:37:05 +00:00
Kip Macsai-Goren
c4441eb0fa Merge branch 'main' of github.com:davidharrishmc/riscv-wally 2022-10-04 17:33:54 +00:00
Kip Macsai-Goren
175e824a61 Renamed endianswap to match module name 2022-10-04 17:33:49 +00:00
Ross Thompson
56cc04316c Fixed a very subtle bug in the trap handler. It was possible to select the wrong cause if an interrupt was pending, but it was supressed by Committed and another exception triggered. 2022-10-02 16:21:21 -05:00
Ross Thompson
02ed8fc301 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-10-01 15:01:22 -05:00
Ross Thompson
bc94f4aef1 Disable IFU bus access on TrapM. 2022-10-01 14:54:16 -05:00
Ross Thompson
e6db1c5cf8 Added logic to not implement the save/restore muxes for LSU in the EBU's controller input stage. 2022-09-29 18:37:34 -05:00
David Harris
fc4146f409 Adding start signals for integer divider to fdivsqrt 2022-09-29 16:30:25 -07:00
Ross Thompson
47e936cab3 Renamed signals in EBU. 2022-09-29 18:29:38 -05:00
cturek
c72e2e5d49 Added integer inputs and flags to divsqrt 2022-09-29 23:08:27 +00:00
Ross Thompson
f9c4b32bd5 Simplification to EBU. 2022-09-29 18:06:34 -05:00
Ross Thompson
146ff6ff6a Fixed HTRANS not changing after accepting HREADY. This exposed a bug in uncore. 2022-09-29 11:54:03 -05:00
Ross Thompson
638e506d0b Hmm. the icache and ifu didn't have a CommittedF signals going back to the privileged unit. They probably should. If an interrupt occurred during the middle of an instruction fetch icache miss I think it would corrupt the icache. 2022-09-28 17:39:51 -05:00
Ross Thompson
87485ed237 Possible fix for ifu/lsu arbiration issue. 2022-09-27 17:24:35 -05:00
Ross Thompson
afc6934249 Possible fix to the bus cache interaction. 2022-09-27 11:34:33 -05:00
Ross Thompson
dfe6bdd06d Found a hidden bug in the cache to bus fsm interlock. 2022-09-26 17:41:30 -05:00
Ross Thompson
f24b0feeed renamed ahbmulticontroller to ebu. 2022-09-26 14:37:18 -05:00
Ross Thompson
fd47cf05c3 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-26 12:49:16 -05:00
Ross Thompson
fd2a8e621a Yesterday David and I found what is likely a bug in our AHB implementation. HTRANS was getting reset to 2 rather than 0 at the end of a burst transaction. This is fixed. 2022-09-26 12:48:26 -05:00
David Harris
b5d2bbe7ca changed always_ff to always in sram1p1rw to fix testbench complaint 2022-09-25 19:56:40 -07:00
Ross Thompson
dcc00ef4b3 Renamed RW signals through the caches, bus interfaces, and IFU/LSU. 
CPU to $ is called LSURWM or IFURWF.
CPU to Bus is called BusRW
$ to Bus is called CacheBusRW.
 2022-09-23 11:46:53 -05:00
Ross Thompson
6a6686a34b Removed the write first sram model. 2022-09-22 16:12:08 -05:00
Ross Thompson
8a6ca027c2 The valid and dirty bits match the SRAM implementation now. 2022-09-22 16:09:09 -05:00
Ross Thompson
29087812e1 Solved the sram write first / read first issue. Works correctly with read first now. 2022-09-22 14:16:26 -05:00
Ross Thompson
f74d21e063 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-21 18:24:06 -05:00
Ross Thompson
cd5b8be78f Cleaned up the IFU and LSU around dtim and irom address calculation. 2022-09-21 18:23:56 -05:00
David Harris
cfa83fdd98 For radix 4 division, fixed initial C and then could remove unexplained shift from divshiftcalc 2022-09-21 13:30:35 -07:00
David Harris
fce927810a Fixed testbench-fp to support all again 2022-09-21 13:19:48 -07:00
David Harris
f08d5b23d5 Eliminated store after store stall when no cache; simplified divshiftcalc logic. 2022-09-21 13:02:34 -07:00
Ross Thompson
f83d640068 Updated IROMAdr logic. 2022-09-21 12:42:43 -05:00
Ross Thompson
0294ca0469 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-21 12:36:52 -05:00
Ross Thompson
cdc80c1f28 Moved other SRAMs to generic/mem. 2022-09-21 12:36:03 -05:00
David Harris
3b0714b059 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-21 10:35:11 -07:00
David Harris
1c8581dd6d Simplified shipping in divshiftcalc; enhanced testbench-fp to be able to run all 32-bit tests generated by sqrttest 2022-09-21 10:35:08 -07:00
Ross Thompson
427db1f55f Renamed brom1p1r to rom1p1r. 
removed used file bram2p1r1w.sv.
 2022-09-21 12:31:20 -05:00
Ross Thompson
234cf7510e Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-21 12:20:12 -05:00
Ross Thompson
91fcca9d17 Merged together bram1p1rw with sram1p1rw as sram1p1rw. 
Fixed a major issue with the real SRAM implemenation.
 2022-09-21 12:20:00 -05:00
Ross Thompson
d6fa8d51d7 Modified sram1p1rw to support 3 different implementation styles. 
SRAM, Read first, and Write first.
 2022-09-21 11:26:00 -05:00
David Harris
f87e15388a commented SpecialCase 2022-09-21 05:02:08 -07:00
David Harris
b21e36a788 Added SpecialCaseReg to hold SpecialCase for fdivsqrtpostproc 2022-09-21 04:55:43 -07:00
David Harris
437fd52bf6 Gated sticky bit in fdiv with SpecialCase 2022-09-20 20:05:00 -07:00
David Harris
cf5c513221 Restored radix 2 to pass regression 2022-09-20 19:30:16 -07:00
David Harris
9c8edb9cb6 renamed u to udigit to avoid conflict with U 2022-09-20 19:29:23 -07:00
cturek
e8f2715a81 Fixed R4 Sqrt overshifting 2022-09-21 00:05:36 +00:00
cturek
49a1259cf9 Fixed fgen4 2022-09-20 20:00:01 +00:00
Ross Thompson
c73fae8a96 Merge branch 'tempMain' into main 2022-09-20 13:57:38 -05:00
Ross Thompson
1c2e47e137 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-20 11:56:53 -05:00
Ross Thompson
b2f4d4aaa7 Added chip enables to sram. 2022-09-20 10:49:14 -05:00
David Harris
33af1f97f7 Define LOGNORMSHIFTSZ 2022-09-20 08:31:57 -07:00
Ross Thompson
7470bf7c7c Added comment. 2022-09-20 09:49:53 -05:00
Ross Thompson
ea6b687f7c Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-20 09:47:16 -05:00
David Harris
811f498f63 renamed q to u for unified digit selection 2022-09-20 04:35:14 -07:00
David Harris
705a2bd97b Removed D2 and D2b from radix2 stage 2022-09-20 04:20:38 -07:00
David Harris
c77ec2aa9c Simplified UM initialization 2022-09-20 04:18:12 -07:00
David Harris
956011b40b fdivsqrtfgen4 comments 2022-09-20 04:13:21 -07:00
David Harris
8d1408a9d6 Moved fpu modules into subdirectories 2022-09-20 04:12:05 -07:00
David Harris
0af8151c2a Partitioned fdivsqrt into one module per file and added file names to opening comments 2022-09-20 03:57:57 -07:00
David Harris
5b13140078 Simplified fdivsqrtpostproc QmM logic 2022-09-20 03:30:18 -07:00
David Harris
8647de5ee4 make QmM size b+1 indpenedent of radix 2022-09-20 03:25:09 -07:00
David Harris
31c3b62774 clean up divshiftcalc 2022-09-20 03:19:50 -07:00
David Harris
7177745111 clean up divshiftcalc 2022-09-20 03:17:29 -07:00
David Harris
b48bbc4294 clean up divshiftcalc 2022-09-20 03:13:11 -07:00
David Harris
010c88816b clean up divshiftcalc 2022-09-20 03:08:25 -07:00
David Harris
712f1d8d3a Cleaning up divshiftcalc LOGNORMSHIFTSZ 2022-09-20 02:35:01 -07:00
Jacob Pease
c797aee62c Fixed rxfifotimeout restarting for every new character, even when already high. 2022-09-19 18:00:30 -05:00
cturek
85b3e9bfe6 Radix 4 sqrt passing first two tests 2022-09-19 21:26:32 +00:00
Ross Thompson
6a1b909a3f Fixed up IFU ahb interface names and widths. 2022-09-19 10:54:22 -05:00
David Harris
1e6bd26bb6 Removed EarlyTermShift from fdiv 2022-09-19 08:44:23 -07:00
David Harris
a36747fda0 Finished unified divsqrt otfc and fgen name changes 2022-09-19 08:30:59 -07:00
David Harris
34bd82e4a3 fdivsqrtiter simplification 2022-09-19 01:08:01 -07:00
David Harris
b19c37eb0f Reduced number of cycles needed for division 2022-09-19 01:02:04 -07:00
David Harris
7826cf0bcb Cleaned up otfc4 2022-09-19 00:58:20 -07:00
David Harris
6bab8f0e3f OTFC simplification 2022-09-19 00:51:56 -07:00
David Harris
362056f53d Removed unused otfc for Q 2022-09-19 00:43:27 -07:00
David Harris
32028c437c fdiv cleanup 2022-09-19 00:32:34 -07:00
David Harris
b7b082482f Division working again for radix 2 with unified OTFC 2022-09-19 00:30:30 -07:00
David Harris
91194a9c3e Unified on-the-fly conversion working for radix 2; broke radix-4 division 2022-09-19 00:04:00 -07:00
David Harris
9fb3382ec3 Added 2 bits to C to initialize properly 2022-09-18 22:44:22 -07:00
David Harris
33933dd6b0 Added 2 bits to C to initialize properly 2022-09-18 22:42:35 -07:00
David Harris
24aa410984 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-18 21:27:36 -07:00
David Harris
198a134304 FP testbench 2022-09-18 21:27:21 -07:00
David Harris
1187187a5c Divide testfloat starts with half-precision tests 2022-09-18 06:46:47 -07:00
Ross Thompson
0fb45cffa1 Removed NonIROM and NonDTIM select signals from IFU and LSU. 2022-09-17 22:01:03 -05:00
Ross Thompson
cc1ba84637 Found the ahb burst bug. 
We had instruction fetches fixed HSIZE = 2 (4 bytes) for all requests.  It should be HSIZE = 3 (8 bytes) for cache fetches and 4 for uncached reads.  The reason this worked for non burst is the DDR4 memory controller returns the full double word even for 4 byte reads.  In burst mode the second beat ending up pointing to the next 4 bytes rather than the next 8 bytes.
 2022-09-17 20:30:01 -05:00
David Harris
f65d941561 Reduced number of cycles required for lower-precision sqrt 2022-09-17 09:55:34 -07:00
David Harris
54ad15d595 Starting to adust number of cycles for division/sqrt 2022-09-17 05:58:59 -07:00
cturek
f07d4b3481 Fixed j1 to align with new C reg 2022-09-16 02:15:48 +00:00
Kip Macsai-Goren
a4fc5d3476 Created initial endianness tests 2022-09-16 01:06:26 +00:00
David Harris
a7b5a0419a Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-15 12:49:21 -07:00
David Harris
aa1f3ca2be renamed endianswap 2022-09-15 12:49:18 -07:00
Ross Thompson
4c8ae8b421 Fixed subword read to work with bigendian. 2022-09-15 14:08:04 -05:00
David Harris
877cc63063 FDIVSQRT cleanup 2022-09-15 09:10:57 -07:00
Ross Thompson
db56a326c9 renamed multimanager to multicontroller. 2022-09-14 14:03:37 -05:00
Ross Thompson
a536829824 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-14 13:59:22 -05:00
cturek
5b35473339 Added shift for radix 4 sqrt 2022-09-14 17:34:24 +00:00
cturek
9757d8ce3e Moved X-1 to preproc 2022-09-14 17:26:56 +00:00
cturek
0f5b38a6f0 Delete srt 2022-09-14 17:02:42 +00:00
cturek
8378d6b871 removed unnecessary XZero from wsmux 2022-09-14 16:59:52 +00:00
David Harris
4038c4faa9 ZMerge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-14 09:42:17 -07:00
Ross Thompson
2ae62c2869 pipelining of fetch into evict AHB requests. 2022-09-13 17:51:55 -05:00
Ross Thompson
40e7d2648f Renamed signals in the LSU. 2022-09-13 11:47:39 -05:00
David Harris
2babf1fd7a Removed unused signals 2022-09-12 11:35:35 -07:00
David Harris
f45bb25618 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-08 16:05:58 -07:00
David Harris
1688d544b9 Moved C to shift before rather than after using in an iteration 2022-09-08 16:05:53 -07:00
David Harris
1c3064af08 divsqrt comment cleanup 2022-09-08 15:40:42 -07:00
Ross Thompson
33ef158ff4 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-08 17:15:46 -05:00
David Harris
e0a9b19008 CSA-based completion detection 2022-09-08 14:58:08 -07:00
Ross Thompson
8618045bf2 Optimization. Able to remove hptw address muxes from the E stage. 2022-09-08 15:51:18 -05:00
Ross Thompson
d12ceb46b0 Oups the ahbinterface.sv was accidentally named abhinterface.sv. 2022-09-08 13:21:37 -05:00
Ross Thompson
fbea27bd69 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-07 16:36:51 -05:00
Ross Thompson
ae4a55471d Oups fixed order of ending swap with mux between cache and fetch buffer. 2022-09-07 16:29:47 -05:00
David Harris
f628622ea0 Factored out aplusbeq0 unit 2022-09-07 11:36:35 -07:00
David Harris
c2f81e309b Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-07 11:11:39 -07:00
David Harris
b0cf73d19c Running 16-bit square root cases first in testfloat 2022-09-07 11:11:35 -07:00
Ross Thompson
fd4b382ec6 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-09-07 12:26:50 -05:00
David Harris
e01b03e9b2 Run 16-bit fsqrt tests first 2022-09-07 10:26:09 -07:00
Ross Thompson
54c55b57cb Named change for ahb tests to be less annoying. 2022-09-07 12:24:41 -05:00
David Harris
d91b4de348 Preprocessing cleanup 2022-09-07 10:21:27 -07:00