Ross Thompson
9bcb105aa4
Changed names of Icache signals.
2021-12-30 11:01:11 -06:00
Ross Thompson
a37c7515bd
Icache now works with any sized cache line a power of 2, greater than or equal to 32.
2021-12-30 10:37:57 -06:00
Ross Thompson
d50a65720d
More name cleanup in caches.
2021-12-30 09:18:16 -06:00
Ross Thompson
077bc35e10
Updated lsu so it is possible to condictionally implement dcache or passthrough to ebu.
2021-12-29 22:24:37 -06:00
Ross Thompson
e0ff7564f4
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-12-29 21:39:57 -06:00
Ross Thompson
d474caf24f
Removed WAdr from cacheway as it is redundant.
2021-12-29 21:39:43 -06:00
Ross Thompson
7765178a04
Rename of dcache interface signals.
2021-12-29 21:26:15 -06:00
David Harris
c54d81ab04
Fixed generate statement name in csrm for buildroot regression
2021-12-30 03:01:21 +00:00
David Harris
f441c8e16a
Fixed lint for RV32IC by handling PMP_ENTRIES = 0 in csrm, but may have broken buildroot.
2021-12-30 02:38:42 +00:00
Ross Thompson
fd341eda04
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-12-29 20:18:06 -06:00
Ross Thompson
dd81076671
Fixed lint issues with SDC.
2021-12-29 20:18:00 -06:00
David Harris
5ac170cb3a
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2021-12-30 00:53:44 +00:00
David Harris
98aaa970dd
rv32i regression and linting
2021-12-30 00:53:39 +00:00
Katherine Parry
30562bcada
all FCVT imperas tests pass
2021-12-30 00:19:40 +00:00
Ross Thompson
a16b97cfb4
Added default to busfsm.
2021-12-29 17:53:24 -06:00
Ross Thompson
90ccc94e5e
Moved lsu interlock fpm to separate module.
2021-12-29 17:40:24 -06:00
Ross Thompson
81741925aa
Moved LSU Bus interface control path into it's own module.
2021-12-29 17:35:45 -06:00
Ross Thompson
0782e5c5a6
Moved LSU Bus interface control path into it's own module.
2021-12-29 17:12:29 -06:00
Ross Thompson
1730f644af
Name cleanup in LSU.
2021-12-29 16:34:35 -06:00
Ross Thompson
050523487c
Changed names of lsu address signals.
2021-12-29 15:03:34 -06:00
Ross Thompson
b1116600fe
Added more generates around virtual memory and csrs in the lsu.
2021-12-29 14:48:09 -06:00
Ross Thompson
bc437cf7e0
Cleaned up some names in dcache and lsu.
2021-12-29 11:21:44 -06:00
Ross Thompson
fe22d4544f
Converted mux4 to mux3 in dcache.
2021-12-29 10:58:02 -06:00
Ross Thompson
0c88ddeb5a
Simplified the dcache to bus address generation.
2021-12-29 10:46:48 -06:00
Ross Thompson
6052a69ba7
Fixed interrupt delay bug by reverting CommittedM changes.
2021-12-28 22:27:12 -06:00
Ross Thompson
1894afd0d8
Changed name of LSU's FetchCount to WordCount. This better reflex the dual usage as fetch and eviction counters.
...
Fixed bug with the uncached memory operations. The periph tests still do not pass. They enter into what seems an intentional infinite loop. Then a uart interrupt jumps into an ISR but the ISR returns back to the loop.
2021-12-28 21:28:03 -06:00
Ross Thompson
76d1dc1721
LSU Bus FSM beautification.
2021-12-28 16:53:53 -06:00
Ross Thompson
e29803be30
Removed CommittedM as it is redundant with LSUStall.
2021-12-28 16:14:10 -06:00
Ross Thompson
39bd78c295
Changed the bus name between dcache and ebu.
2021-12-28 15:57:36 -06:00
Ross Thompson
d62cd1f701
Reverted changes to subwordread while keeping the new names of the i/o.
2021-12-28 15:57:21 -06:00
Ross Thompson
9c190b019b
Name changes for states in LSU.
2021-12-28 15:03:24 -06:00
Ross Thompson
13b4201198
Added generate around virtual memory hardware in LSU.
2021-12-28 15:00:02 -06:00
Ross Thompson
f09b10a393
Moved generate for lrsc to lsu.
2021-12-28 14:17:18 -06:00
Ross Thompson
73af458eb5
More cleanup of dcache.
2021-12-28 14:12:18 -06:00
Ross Thompson
0e86e5d9f1
Additional cleanup of the LSU.
2021-12-28 13:59:07 -06:00
Ross Thompson
1e76c24f26
Major cleanup of the LSU.
2021-12-28 13:10:45 -06:00
Ross Thompson
79b17c5b55
Removed WalkerInstrPageFault from icache, privilege unit, lsu, and hptw.
2021-12-28 12:33:07 -06:00
Ross Thompson
34c11ca8d5
Minor dcache cleanup.
2021-12-28 11:29:16 -06:00
Ross Thompson
243728d089
Moved all bus logic outside the dcache. Still needs cleanup.
2021-12-28 11:18:47 -06:00
Ross Thompson
74d636cb53
First cut at moving the dcache bus interface into the LSU.
...
Regression test does not run and there is a lot of cleanup to do.
2021-12-27 18:12:59 -06:00
Ross Thompson
d366a1f50f
Moved dcache fetch logic outside the dcache except for the fsm.
2021-12-27 16:45:49 -06:00
Ross Thompson
e3ddcbb11e
Partial commit.
...
Moved AMO, SWW, and SWR outside the dcache.
Step 1 of separate the fetching logic from the caches.
2021-12-27 15:56:18 -06:00
Ross Thompson
7fe70c3cc6
Removed the fault state from the hptw. Now writing TLB faults into the I/DTLBs. This has two advantages.
...
1: It simplifies the interactions between the caches and the hptw.
2: instruction page faults are fetched 3 times, caching them in the ITLB speeds up this process.
There are two downsides.
1: Pollute the TLBs with not very relavent translations
2: Have to compute the misalignment. This can be cached in the TLB which only costs 1 flip flop
for each TLB line.
2021-12-23 12:40:22 -06:00
Ross Thompson
6a8e917e06
It was possible for a load/store followed by tlb miss and update to have an exception and still commit its result to memory or register.
2021-12-21 15:59:56 -06:00
Ross Thompson
7844d3f064
Fixed bug where the wrong address is read into the icache memory.
2021-12-21 15:16:00 -06:00
Ross Thompson
8b97aaac3e
Fixed complex bug where FENCE is instruction class miss predicted as a taken branch.
2021-12-21 11:29:28 -06:00
Ross Thompson
3f62a64056
Identified bug in the IFU which selects PCNextF when InvalidateICacheM is true. If the ID is invalid PCNextF should NOT be PCE.
2021-12-20 23:45:55 -06:00
Ross Thompson
a157235a4b
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2021-12-20 23:27:46 -06:00
Ross Thompson
ffe792bcfc
Fixed bug on icache spill. if the cpu stalled on the completion it was possible to use the wrong address for the sram read. Also miss spill hit always selected the wrong address.
2021-12-20 23:27:37 -06:00
David Harris
bf9082b0ad
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2021-12-20 21:09:20 -08:00
