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396 Commits

Author SHA1 Message Date
bbracker
8f7ddcfdff rv64 interrupt servicing 2021-04-14 10:19:42 -04:00
Thomas Fleming
7d2d6823f1 Fix mmu lint errors 2021-04-13 19:19:58 -04:00
Thomas Fleming
0a9b208729 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2021-04-13 17:15:10 -04:00
Katherine Parry
ef011496a7 Various bugs fixed in FMA 2021-04-13 18:27:13 +00:00
Thomas Fleming
09c9c49541 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 
Conflicts:
	wally-pipelined/src/ebu/pagetablewalker.sv
 2021-04-13 13:42:03 -04:00
Thomas Fleming
6188f10732 Move InstrPageFault to fetch stage 2021-04-13 13:39:22 -04:00
Thomas Fleming
dc8a165806 Add lru algorithm to TLB 2021-04-13 13:37:24 -04:00
Teo Ene
1018a10625 Various code syntax changes to bring HDL to a synthesizable level 2021-04-13 11:27:12 -05:00
Jarred Allen
4ae1df1290 Merge branch 'main' into cache 2021-04-13 01:10:03 -04:00
Jarred Allen
fc8b8ad7aa A few more cache fixes 2021-04-13 01:07:40 -04:00
Ross Thompson
35f8b4f74f Fixed minor bug in muldiv which corrects the lint error. 2021-04-09 10:56:31 -05:00
Jarred Allen
d99b8f772e Merge from branch 'main' 2021-04-08 17:19:34 -04:00
Katherine Parry
f4cb92ae71 fixed FPU lint warnings 2021-04-08 18:03:21 +00:00
Katherine Parry
27cb94e7af fixed FPU lint warnings 2021-04-08 17:55:25 +00:00
Domenico Ottolia
65abe13f4f Cause an Illegal Instruction Exception when attempting to write readonly CSRs 2021-04-08 05:12:54 -04:00
Thomas Fleming
fc39535e4e Refactor TLB into multiple files 2021-04-08 03:24:10 -04:00
Thomas Fleming
c54aecde73 Provide attribution link for priority encoder 2021-04-08 03:05:06 -04:00
Thomas Fleming
303c2c4839 Implement support for superpages 2021-04-08 02:44:59 -04:00
Ross Thompson
4322694f7a Switch to use RV64IC for the benchmarks. 
Still not working correctly with the icache.

instr
addr   correct   got
 2021-04-07 19:12:43 -05:00
Ross Thompson
c91436d3b7 Merge branch 'icache_bp_bug' into tests 
Not sure this merge is right.
 2021-04-06 21:46:40 -05:00
Ross Thompson
98a04abe6c Merge remote-tracking branch 'refs/remotes/origin/tests' into tests 2021-04-06 21:20:55 -05:00
Jarred Allen
bd8f1eea3c Fix another bug in icache 2021-04-06 17:47:00 -04:00
Jarred Allen
3afc358974 Fix another bug in icache 2021-04-06 12:48:42 -04:00
bbracker
38017e6aae declare memread signal 2021-04-05 08:13:01 -04:00
bbracker
a4c3afb847 PLIC claim reg side effects now check for memread signal 2021-04-05 08:03:14 -04:00
bbracker
4a5aa5b202 plic subword access compliance 2021-04-04 23:10:33 -04:00
Katherine Parry
e6a7353847 Added missing files in FPU 2021-04-04 18:09:13 +00:00
bbracker
31c6b2d01f Yee hoo first draft of PLIC plus self-checking tests 2021-04-04 06:40:53 -04:00
Thomas Fleming
6b43381c38 Comment out fpu from hart until module exists 2021-04-03 22:34:11 -04:00
Thomas Fleming
dbd5a4320e Merge branch 'mmu' into main 
Conflicts:
	wally-pipelined/src/wally/wallypipelinedhart.sv
 2021-04-03 22:12:52 -04:00
Thomas Fleming
8dfec29f7e Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2021-04-03 22:09:50 -04:00
Thomas Fleming
1cbdaf1f05 Fix extraneous page fault stall 2021-04-03 21:28:24 -04:00
Jarred Allen
c95da7d11e Fix bug in icache 2021-04-03 18:10:54 -04:00
Katherine Parry
d7b1379ab8 Integrated FPU 2021-04-03 20:52:26 +00:00
Ross Thompson
d21006d048 Partial fix to the integer divide stall issue. 2021-04-02 15:32:15 -05:00
James E. Stine
362f6ea2e6 Minor cleanup 2021-04-02 08:20:44 -05:00
James E. Stine
cff08adc3a Added some updates to divider - still not working all the time. Still a bug with signals within muldiv - specificaly MultDivE being modified during Execute stage. Seems to be triggered by ahblite signal. 2021-04-02 06:27:37 -05:00
Thomas Fleming
bfb4b051c6 Merge branch 'main' into mmu 2021-04-01 16:29:39 -04:00
Thomas Fleming
350fe87119 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2021-04-01 16:24:06 -04:00
Thomas Fleming
fdb20ee1cf Implement sfence.vma and fix tlb writing 2021-04-01 15:55:05 -04:00
Jarred Allen
5afb255251 Begin changes to direct-mapped cache 2021-04-01 13:55:21 -04:00
Shreya Sanghai
df149d1be7 fixed minor bugs in localHistory 2021-04-01 13:40:08 -04:00
James E. Stine
0495195d68 Fixed some divide -still bug in AHB causing InstStall to deassert and next instruction to get into divide unit. Hope to fix soon. Divide seems to work if given enough time. 2021-04-01 12:30:37 -05:00
ShreyaSanghai
28a9c6ba56 added localHistoryPredictor 2021-04-01 22:22:40 +05:30
Shreya Sanghai
b544526766 fixed bugs in global history to read latest GHRE 2021-03-31 21:56:14 -04:00
Ross Thompson
9172e52286 Corrected a number of bugs in the branch predictor. 
Added performance counters to individually track
branches; jumps, jump register, jal, and jalr; return.
jump and jump register are special cases of jal and jalr.
Similarlly return is a special case of jalr.
Also added counters to track if the branch direction was wrong,
btb target wrong, or the ras target was wrong.
Finally added one more counter to track if the BP incorrectly predicts
a non-cfi instruction.
 2021-03-31 11:54:02 -05:00
Ross Thompson
a64a37d702 Merge of main with the new icache and the branch predictor. I believe there is a bug in the icache with unaligned memory access. The second part of the access is incorrectly relying on the PCF being the address of the next two bytes of the instruction. However this is not always the case as the branch predictor can get the wrong target address. The icache needs to generate the +2 address internally. 2021-03-30 23:18:20 -05:00
Thomas Fleming
77b8e27205 Disable 'always-on' virtual memory 2021-03-30 22:49:47 -04:00
Thomas Fleming
eca2427f94 Merge remote-tracking branch 'origin/main' into main 
Bring icache and MMU code together

Conflicts:
	wally-pipelined/src/ifu/ifu.sv
	wally-pipelined/testbench/testbench-imperas.sv
 2021-03-30 22:24:47 -04:00
Thomas Fleming
7126ab7864 Complete basic page table walker 2021-03-30 22:19:27 -04:00
ushakya22
6b9ae41302 Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main 2021-03-30 15:25:07 -04:00
Ross Thompson
2a308309e4 fixed some bugs with the RAS. 2021-03-30 13:57:40 -05:00
Jarred Allen
631454ccf9 Merge branch 'cache2' into cache 
Conflicts:
	wally-pipelined/testbench/testbench-imperas.sv
 2021-03-30 13:32:33 -04:00
Jarred Allen
7ca57cc4fc Merge branch 'main' into cache 
Conflicts:
	wally-pipelined/regression/wave-dos/ahb-waves.do
	wally-pipelined/src/ifu/ifu.sv
	wally-pipelined/testbench/testbench-busybear.sv
	wally-pipelined/testbench/testbench-imperas.sv
 2021-03-30 12:55:01 -04:00
Noah Boorstin
b5a1691c2b Merge branch 'main' into cache 
Conflicts:
	wally-pipelined/testbench/testbench-busybear.sv
 2021-03-26 12:26:30 -04:00
Shreya Sanghai
339bd5d3eb Merge branch 'PPA' into main 
Conflicts:
	wally-pipelined/testbench/testbench-privileged.sv
 2021-03-25 20:35:21 -04:00
Jarred Allen
39bf2347bc Fix error when reading an instruction that crosses a line boundary 2021-03-25 18:47:23 -04:00
ShreyaSanghai
139c2076a1 Removed PCW and InstrW from ifu 2021-03-26 01:53:19 +05:30
Jarred Allen
32829bf7a1 Remove old icache 2021-03-25 15:46:35 -04:00
Jarred Allen
5f4feb0ff1 Works for misaligned instructions not on line boundaries 2021-03-25 15:42:17 -04:00
Jarred Allen
3b4f0141f4 Begin work on compressed instructions 2021-03-25 14:43:10 -04:00
Brett Mathis
162f2df880 FPU Pipeline completed - can begin integration 2021-03-25 13:29:03 -05:00
Jarred Allen
0290568a52 Make cache output NOP after a reset 2021-03-25 13:18:30 -04:00
Jarred Allen
ce6f102fc5 Clean up some stuff 2021-03-25 13:04:54 -04:00
Jarred Allen
128278ea27 Working for all of rv64i now, but not compressed instructions 2021-03-25 13:02:26 -04:00
Jarred Allen
602271ff7b rv64i linear control flow now working 2021-03-25 13:02:26 -04:00
Jarred Allen
ba95557c44 More progress on icache controller 2021-03-25 13:01:11 -04:00
Jarred Allen
ad0d77e9e1 Begin rewrite of icache module to use a direct-mapped scheme 2021-03-25 13:01:10 -04:00
Jarred Allen
ebd6b931c6 Fix bug in cache line 2021-03-25 12:59:30 -04:00
Jarred Allen
b774d35c34 Output NOP instead of BAD when reset 2021-03-25 12:42:48 -04:00
Jarred Allen
4b92a595ab Merge branch 'main' into cache 
Conflicts:
	wally-pipelined/src/uncore/dtim.sv
 2021-03-25 12:10:26 -04:00
Thomas Fleming
e3900bd0fa Finish finite state machines for page table walker 2021-03-25 02:48:40 -04:00
Thomas Fleming
b5003b093a Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2021-03-25 02:35:21 -04:00
bbracker
a3788eb218 added 1 tick delay to dtim flops 2021-03-25 02:23:30 -04:00
bbracker
b5fa410e15 added 1 tick delay on tim reads 2021-03-25 02:15:28 -04:00
Jarred Allen
682050a33b Merge branch 'main' into cache 
Conflicts:
	wally-pipelined/src/ifu/ifu.sv
 2021-03-25 00:51:12 -04:00
bbracker
67b27cd2f5 instrfault direspecting stalls bugfix 2021-03-25 00:44:35 -04:00
bbracker
02e924e55a instrfaults not respecting stalls bugfix 2021-03-25 00:16:26 -04:00
bbracker
1e3f683a9d upgraded gpio bus interface 2021-03-25 00:15:02 -04:00
bbracker
e98dd420bc future work comment about suspicious-looking verilog in csri.sv 2021-03-25 00:10:44 -04:00
Thomas Fleming
b1d849c822 Add all PMP addr registers 2021-03-24 21:58:33 -04:00
Katherine Parry
18cb1f4873 fixed various bugs in the FMA 2021-03-24 21:51:17 +00:00
Ross Thompson
a99c0502e5 Fixed bugs with the csr interacting with StallW. StallW is required to pervent updating a csr. Now have a working branch predictor and performance counters to track the number of commited branches and mispredictions. 2021-03-24 15:56:55 -05:00
Jarred Allen
c1fe16b70b Give some cache mem inputs a better name 2021-03-24 12:31:50 -04:00
Jarred Allen
a51257abca Fix compile errors from const not actually being constant (why does Verilog do this) 2021-03-24 00:58:56 -04:00
Ross Thompson
1c6e37120e Fixed RAS errors. Still some room for improvement with the BTB and RAS. 2021-03-23 23:00:44 -05:00
Jarred Allen
4410944049 Merge branch 'main' into cache 2021-03-23 23:35:36 -04:00
Ross Thompson
84ad1353e4 Fixed a bunch of bugs with the RAS. 2021-03-23 21:49:16 -05:00
Katherine Parry
56dc8de009 fixed various bugs in the FMA 2021-03-24 01:35:32 +00:00
Ross Thompson
4fb7a1e0a6 Fixed the valid bit issue. Now the branch predictor is actually predicting instructions. 2021-03-23 20:20:23 -05:00
Ross Thompson
49348d734b fixed issue with BTB's valid bit not updating. There is still a problem is valid not ocurring in the correct clock cycle. 2021-03-23 20:06:45 -05:00
Ross Thompson
95dbc5f1fa fixed a whole bunch of bugs with the branch predictor. Still an issue with how PCNextF is not updated because the CPU is stalled. 2021-03-23 16:53:48 -05:00
Jarred Allen
d6ecc3ede0 Begin work on direct-mapped cache 2021-03-23 17:03:02 -04:00
Teo Ene
ef3d2dda48 Added BOOTTIM to InstrAccessFaultF calculation in uncore/imem 2021-03-23 15:21:13 -05:00
Shreya Sanghai
1d6a2989ed PC counts branch instructions 2021-03-23 14:25:51 -04:00
Jarred Allen
0f8fe8fb3b Document some internal signals 2021-03-23 00:10:35 -04:00
Jarred Allen
6ffa01cc4d Add comments explaining icache inputs 2021-03-23 00:07:39 -04:00
Jarred Allen
827993598d Small commit to see if new hook tests non-main branch 2021-03-22 23:57:01 -04:00
Noah Boorstin
15474f678d Merge branch 'main' into cache 2021-03-22 23:28:30 -04:00
bbracker
5efd5958e7 added delays to uart AHB signals 2021-03-22 15:40:29 -04:00
Jarred Allen
6ce52f9b80 Remove DelaySideD since it isn't needed 2021-03-22 15:13:23 -04:00
Jarred Allen
b871bfe714 Update icache interface 2021-03-22 15:04:46 -04:00
Jarred Allen
3748d03adc Merge branch 'main' into cache 2021-03-22 13:47:48 -04:00
bbracker
11d4a8ab34 first pass at PLIC interface 2021-03-22 10:14:21 -04:00
Katherine Parry
f741ba7702 fixed various bugs in the FMA 2021-03-21 22:53:04 +00:00
Jarred Allen
f9cf05a7d4 Fix bug with PC incrementing 2021-03-20 18:06:03 -04:00
Jarred Allen
a3a646d1a9 Merge branch 'main' into cache 2021-03-20 17:56:25 -04:00
Jarred Allen
a2bf5ac202 Fix another bug in the icache (why so many of them?) 2021-03-20 17:54:40 -04:00
Jarred Allen
c5f99c4a34 Revert "Change flop to listen to StallF" 
This reverts commit c8028710a5.
 2021-03-20 17:34:19 -04:00
Jarred Allen
c8028710a5 Change flop to listen to StallF 2021-03-20 17:04:13 -04:00
Katherine Parry
e317e7511e messy FMA rewrite using section 7.5.4 in The Handbook of Floating-Point Arithmetic 2021-03-20 02:05:16 +00:00
Jarred Allen
279c09b27c Merge changes from main 2021-03-18 18:58:10 -04:00
bbracker
85363e941d AHB bugfixes and sim waveview refactoring 2021-03-18 18:25:12 -04:00
bbracker
98e93a63c0 maybe AHB works now 2021-03-18 17:47:00 -04:00
Shreya Sanghai
bbe0957df5 Merge branch 'gshare' into main 
Conflicts:
	wally-pipelined/regression/wave.do
 2021-03-18 17:25:48 -04:00
Ross Thompson
1091dd10c1 Switched to gshare from global history. 
Fixed a few minor bugs.
 2021-03-18 16:05:59 -05:00
Ross Thompson
8f4051543c Fixed minor bug with the size of gshare. 2021-03-18 16:00:09 -05:00
Shreya Sanghai
eb86bfc084 removed unnecesary PC registers in ifu 2021-03-18 16:31:21 -04:00
Thomas Fleming
8d484174a7 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2021-03-18 14:36:42 -04:00
Thomas Fleming
7f7597e667 Connect tlb, pagetablewalker, and memory 2021-03-18 14:35:46 -04:00
Noah Boorstin
bc1a0c6ee7 change ifndef to generate/if 2021-03-18 12:50:19 -04:00
Noah Boorstin
a2b0af460e everyone gets a bootram 2021-03-18 12:35:37 -04:00
Shreya Sanghai
36f0631203 added gshare and global history predictor 2021-03-16 17:03:01 -04:00
Jarred Allen
a82aa23399 Fix icache for jumping into misaligned instructions 2021-03-16 16:57:51 -04:00
Shreya Sanghai
9eed875886 added global history branch predictor 2021-03-16 16:06:40 -04:00
Jarred Allen
2d2092e8ab Merge remote-tracking branch 'origin/main' into cache 2021-03-16 14:17:39 -04:00
Shreya Sanghai
08e9149e20 made performance counters count branch misprediction 2021-03-16 11:24:17 -04:00
Shreya Sanghai
74f1641c5a Merge branch 'counters' into main 
added a configurable number of performance counters
 2021-03-16 11:01:30 -04:00
Jarred Allen
ac9fd5a323 Fix BEQZ tests 2021-03-14 15:42:27 -04:00
Jarred Allen
926235b180 Merge upstream changes 2021-03-14 14:57:53 -04:00
Jarred Allen
deb13f34bb Get non-jump case working 2021-03-14 14:46:21 -04:00
bbracker
e58d17d5b7 slightly smarter dtim HREADY 2021-03-13 07:03:33 -05:00
bbracker
345254b5a3 slightly smarter dtim HREADY 2021-03-13 06:55:34 -05:00
bbracker
c5015e5809 imem rd2 adrbits bugfix 2021-03-13 00:10:41 -05:00
bbracker
f4fb546969 clint HREADY signal update 2021-03-12 20:23:55 -05:00
Ross Thompson
6ee97830f7 Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main 2021-03-12 14:58:04 -06:00
Ross Thompson
7743d8edc3 Cleanup of the branch predictor flush and stall controls. 2021-03-12 14:57:53 -06:00
David Harris
865c103599 64-bit AMO debugged 2021-03-11 23:18:33 -05:00
Thomas Fleming
1294235837 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 
Conflicts:
	wally-pipelined/src/ebu/ahblite.sv
 2021-03-11 00:15:58 -05:00
David Harris
42275e92ed Initial untested implementation of AMO instructions 2021-03-11 00:11:31 -05:00
Noah Boorstin
2c25e270a2 change flop in ahb controller to use normal flop module 2021-03-10 19:14:02 +00:00
Jarred Allen
ae9bcc174d Merge upstream changes 2021-03-09 21:20:34 -05:00
Jarred Allen
3172be3039 More progress 2021-03-09 21:16:07 -05:00
David Harris
17c0f9629a WALLY-LRSC atomic test passing 2021-03-09 09:28:25 -05:00
David Harris
9c7da510fb Created atomic test vector and directories 2021-03-08 09:38:55 -05:00
Ross Thompson
87ed6d510c Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main 2021-03-05 15:27:22 -06:00
Ross Thompson
301166d062 Oups. I forgot to update other do files with the commands to preload the branch predictor memories. 2021-03-05 15:23:53 -06:00
Thomas Fleming
be6ee84d87 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2021-03-05 15:46:51 -05:00
Noah Boorstin
86142e764a Merge branch 'main' into busybear 2021-03-05 20:27:19 +00:00
bbracker
850a2e9329 added a delay to sel signals 2021-03-05 15:07:34 -05:00