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396 Commits

Author SHA1 Message Date
Ross Thompson
020fb65adf Fixed icache for 32 bit. 
Merge branch 'cache' into main
 2021-04-22 16:45:29 -05:00
Ross Thompson
c42399bdb5 Yes. The hack to not repeat the d memory operation fixed this issue. 2021-04-22 15:22:56 -05:00
Thomas Fleming
da76b80991 Write PCM to TVAL registers 2021-04-22 16:17:57 -04:00
Thomas Fleming
8fee3b3872 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2021-04-22 15:37:19 -04:00
Thomas Fleming
00ce24e67c Prepare to squash bad ahb accesses 2021-04-22 15:36:45 -04:00
Thomas Fleming
53c05d6a73 Clean up lint errors in fpu and muldiv 
booth.sv had an actual error where a signal was being assigned to too
many bits. muldiv has a lot of non blocking assignments, so I suppressed
those warnings so the linter output was readable.
 2021-04-22 15:36:03 -04:00
Domenico Ottolia
6b4d2e9634 Fix misa synthesis bug (for real now) 2021-04-22 15:35:20 -04:00
Thomas Fleming
38236e9172 Implement first pass at the PMA checker 2021-04-22 15:34:02 -04:00
Thomas Fleming
6d1a6694a8 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2021-04-22 13:20:12 -04:00
bbracker
74b35ac57a greatly improved PLIC register interface 2021-04-22 11:22:01 -04:00
Ross Thompson
d8ab7a5de2 Partially working icache. 
The current issue is a StallF is required to halt the icache from getting an updated PCF. However
if the dmemory is the reason for a stall it is possible for the icache stall to hold the d memory request continuously causing d memory to repeatedly read from memory.  This keeps StallF high and
the icache FSM is never allowed to complete.
 2021-04-22 10:20:36 -05:00
Thomas Fleming
00b3e36b30 Refactor tlb_ram to use flop primitives 2021-04-22 01:52:43 -04:00
Thomas Fleming
ef80176e2c Extend stall on leaf page lookups 2021-04-22 01:51:38 -04:00
Domenico Ottolia
fb8f244dab Fix misa bug 2021-04-22 00:59:07 -04:00
Thomas Fleming
e336fbd108 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 
Conflicts:
	wally-pipelined/src/ifu/ifu.sv
 2021-04-21 20:01:08 -04:00
Thomas Fleming
4bae666fa1 Implement virtual memory protection 2021-04-21 19:58:36 -04:00
Ross Thompson
7b3735fc25 Fixed for the instruction spills. 2021-04-21 16:47:05 -05:00
Teo Ene
ddc98e7d08 Fixed most relevant remaining synthesis compilation warnings with Ben 2021-04-21 16:06:27 -05:00
Ross Thompson
532c8771ba major progress. 
It's running the icache is imperas tests now.
Compressed does not work yet.
 2021-04-21 08:39:54 -05:00
Domenico Ottolia
bf86a809eb Add tests for sepc register 2021-04-20 23:50:53 -04:00
Ross Thompson
f3093ac612 Why was the linter messed up? 
There are a number of combo loops which need fixing outside the icache.  They may be fixed in main.
We get to instruction address 50 now!
 2021-04-20 22:06:12 -05:00
Ross Thompson
99424fb983 Progress on icache. Fixed some issues aligning the PC with instruction. Still broken. 2021-04-20 21:19:53 -05:00
Ross Thompson
251ece20fe Broken icache. Design is done. Time to debug. 2021-04-20 19:55:49 -05:00
Domenico Ottolia
0c307d2db1 Fix synthesis warnings for privileged unit (replace 'initial' settings) 2021-04-20 17:57:56 -04:00
Jarred Allen
850f728cc7 Merge branch 'main' into cache 2021-04-19 00:05:23 -04:00
Katherine Parry
d12eb0f4eb fixed synth bugs in fpu 2021-04-19 00:39:16 +00:00
Noah Boorstin
9bb1233433 neat verilog thing 2021-04-18 17:48:51 -04:00
Jarred Allen
aef57cab50 dcache lints 2021-04-15 21:13:56 -04:00
bbracker
290b3424e5 Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main 2021-04-15 21:09:27 -04:00
bbracker
368c94d4ff working GPIO interrupt demo 2021-04-15 21:09:15 -04:00
Domenico Ottolia
9f13ee3f31 Add tests for scause and ucause 2021-04-15 19:41:25 -04:00
Domenico Ottolia
92bb38fa8c Add support for vectored interrupts 2021-04-15 19:13:42 -04:00
Teo Ene
2814579f30 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2021-04-15 15:29:09 -05:00
Teo Ene
374a93dae6 Quick fix to ahblite missing default statement done in class :) 2021-04-15 15:29:04 -05:00
Thomas Fleming
e780694ee0 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 
Conflicts:
	wally-pipelined/src/mmu/priority_encoder.sv
 2021-04-15 16:20:43 -04:00
Thomas Fleming
6dd7591ceb Change priority encoder to avoid extra assignment 2021-04-15 16:17:35 -04:00
Thomas Fleming
ff9f1e5e72 Connect tlb and icache properly 2021-04-15 14:48:39 -04:00
Teo Ene
ad86295fcf Temporary change to mmu/priority_encoder.sv 
Necessary to get synth working
Original HDL is still there, just commented out
 2021-04-15 13:37:12 -05:00
Katherine Parry
636e2de9df integraded the FMA into the FPU 2021-04-15 18:28:00 +00:00
Jarred Allen
81c02bda55 Merge branch 'main' into cache 2021-04-15 13:47:19 -04:00
Ross Thompson
87b716170c Merge branch 'bpfixes' into main 2021-04-15 09:06:21 -05:00
Shreya Sanghai
0369fc5d1e Cherry Pick merge of Shreya's localhistory predictor changes into main. 
fixed minor bugs in localHistory
 2021-04-15 09:04:36 -05:00
ShreyaSanghai
6d4042e479 added localHistoryPredictor 2021-04-15 08:58:22 -05:00
Shreya Sanghai
7e9a0602ea fixed bugs in global history to read latest GHRE 
Cherry pick Shreya's commits into main branch.
 2021-04-15 08:55:22 -05:00
bbracker
e69cc0d23a Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main 2021-04-15 09:06:03 -04:00
bbracker
51cdff3e9b csri lint improvement 2021-04-15 09:05:53 -04:00
Jarred Allen
3717699ad9 Add a comment to explain a detail 2021-04-14 23:14:59 -04:00
Thomas Fleming
3c49fd08f6 Remove imem from testbenches 2021-04-14 20:20:34 -04:00
Jarred Allen
892dfd5a9b More icache bugfixes 2021-04-14 19:03:33 -04:00
Jarred Allen
c1e2e58ebe Merge branch 'main' into cache 
Conflicts:
	wally-pipelined/src/cache/dmapped.sv
	wally-pipelined/src/cache/line.sv
	wally-pipelined/src/ifu/icache.sv
 2021-04-14 18:24:32 -04:00
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