Ross Thompson
95bb4cc8a8
Minor cleanup to interlockfsm.
2022-03-08 23:38:58 -06:00
Ross Thompson
0310fe858f
Comments.
2022-03-08 18:05:25 -06:00
Ross Thompson
75e93baaee
Marked signals for name changes.
2022-03-08 17:41:02 -06:00
Ross Thompson
3ec32d7ce8
Removed unused signal.
2022-03-08 16:58:26 -06:00
Ross Thompson
7b96b3f73c
Moved cacheable signal into cache.
2022-03-08 16:34:02 -06:00
David Harris
2cea3349ad
LSU/Cache code review notes
2022-03-04 00:07:31 +00:00
Ross Thompson
15f6871a8d
Added generates to pcnextf muxes for privileged and caches.
2022-02-22 22:45:00 -06:00
Ross Thompson
59f04f2518
Minor busdp cleanup.
2022-02-22 17:28:26 -06:00
Ross Thompson
971dd494f6
Clarified interlockfsm.
2022-02-22 11:31:28 -06:00
Ross Thompson
1ab2e7590b
Added some clearity to lsuvirtmem.sv.
2022-02-21 17:20:58 -06:00
Ross Thompson
ace743ae91
Changed HPTWRead/HPTWWrite to be HPTWRW to be similar to MemRW.
2022-02-21 16:54:38 -06:00
Ross Thompson
414e73edd9
Cleaned up names in lsuvirtmem.
2022-02-21 16:44:30 -06:00
Ross Thompson
456a54166a
Minor cleanup of lsu.
2022-02-21 12:46:06 -06:00
Ross Thompson
5d9ad011d2
Moved mux into lsuvirtmem.
2022-02-21 09:31:29 -06:00
Ross Thompson
a60332b455
Minor changes to LSU.
2022-02-19 14:38:17 -06:00
Ross Thompson
0bd533473c
New config option to enable hptw writes to PTE in memory to update Access and Dirty bits.
2022-02-17 17:19:41 -06:00
Ross Thompson
d152733a17
Rough implementation passing regression test with hptw atomic writes to memory.
2022-02-17 14:46:11 -06:00
Ross Thompson
4cfb601dc8
Fixed a bunch of the virtual memory changes. Now supports atomic update of PTE in memory concurrent with TLB.
2022-02-17 10:04:18 -06:00
Ross Thompson
565ca4e4a3
Broken state. address translation not working after changes to hptw to support atomic updates to PT.
2022-02-16 23:37:36 -06:00
Ross Thompson
beac362364
Moved a few muxes around after sww changes.
2022-02-16 15:43:03 -06:00
Ross Thompson
6a2bcfcd01
cleanup of signal names.
2022-02-16 15:29:08 -06:00
Ross Thompson
bd7343b791
Modified lsu and uncore so only 1 sww is present. The sww is in the LSU if there is a cache or dtim. uncore.sv contains the sww if there is no local memory in the LSU. This is necessary as the subword write needs the read data to be valid and that read data is not aviable in the correct cycle in the LSU if there is no dtim or cache. Muxing could be done to provide the correct read data, but it adds muxes to the critical path.
2022-02-16 15:22:19 -06:00
Ross Thompson
7ffbc6b2ab
Changed names of signals in cache.
2022-02-13 15:06:18 -06:00
Ross Thompson
1c83914662
Fixed bug.
...
It was possible for DTLBMissM to prevent a dcache flush.
2022-02-11 14:00:01 -06:00
David Harris
de5e80696d
Cleaned up synthesis warnings
2022-02-11 01:15:16 +00:00
Ross Thompson
f716cce832
Replacement policy cleanup.
2022-02-10 11:40:10 -06:00
Ross Thompson
104a9acf81
Cleanup.
2022-02-10 11:27:15 -06:00
Ross Thompson
fdb4f909fc
Cleanup + critical path optimizations.
2022-02-10 11:11:16 -06:00
Ross Thompson
36ab78ef3b
Removed all possilbe paths to PreSelAdr from TrapM.
2022-02-09 19:20:10 -06:00
Ross Thompson
7810a09782
Annotated the final changes required to move sram address off the critial path.
2022-02-08 18:17:31 -06:00
Ross Thompson
8a2ee22395
Finished merge.
2022-02-08 11:36:24 -06:00
David Harris
c61cd55c5c
Merged TIM and regular testbenches. RV32e now working and back in regression.
2022-02-08 12:18:13 +00:00
Ross Thompson
ea84211ff9
Removed unused ports from caches and buses.
2022-02-04 22:52:51 -06:00
Ross Thompson
011ad09341
Cleanup.
2022-02-04 22:40:51 -06:00
Ross Thompson
4074f695e0
Moved the hwdata mux back into the busdp.
2022-02-04 22:39:13 -06:00
Ross Thompson
40eb055861
Merged together the two sub cache line read muxes.
...
One mux was used for loads and the other for eviction.
2022-02-04 22:30:04 -06:00
Ross Thompson
290430cda8
Moved the sub cache line read logic to lsu/ifu.
2022-02-04 20:42:53 -06:00
David Harris
a6708ed887
cache cleanup
2022-02-03 15:36:11 +00:00
David Harris
38bbe23d14
More config file cleanup; 32ic tests broken
2022-02-03 01:08:34 +00:00
David Harris
da8819d64b
changed DMEM and IMEM configurations to support BUS/TIM/CACHE
2022-02-03 00:41:09 +00:00
David Harris
02071700d6
Removed Busybear dependencies
2022-02-02 20:28:21 +00:00
Ross Thompson
86bac2a083
partial ifu cleanup.
2022-01-31 16:08:53 -06:00
Ross Thompson
e4ee630a3e
cleanup.
2022-01-31 13:29:04 -06:00
Ross Thompson
c9a163b8fd
Repaired linux-wave.do
2022-01-31 12:54:18 -06:00
Ross Thompson
4422e2f91c
Repaired wavefile and fixed modelsim warning.
2022-01-31 12:34:17 -06:00
Ross Thompson
f4e62bcb54
Cleanup busdp.
2022-01-31 12:17:07 -06:00
Ross Thompson
31da37dd0f
Moved lsu virtual memory logic into separate module.
2022-01-31 11:56:03 -06:00
Ross Thompson
9cd502d0af
Encapsulated dtim.
2022-01-31 11:23:55 -06:00
Ross Thompson
c939eb20eb
Removed unused signals in the LSU.
2022-01-31 10:35:35 -06:00
Ross Thompson
5fe30ff8a9
Moved atomic logic to own module.
2022-01-31 10:28:12 -06:00
Ross Thompson
a4f6653cd8
Encapsulated the bus data path into a separate module.
2022-01-31 10:15:48 -06:00
Ross Thompson
ac50a36aac
LSU and IFU cleanup.
2022-01-28 15:26:06 -06:00
Ross Thompson
42d60235f0
Clean up of mmu instances in IFU and LSU.
2022-01-28 14:02:05 -06:00
Ross Thompson
862bf2faae
Moved all instr/load/storeamo faults to mmu with the exception of instr misaligned fault.
2022-01-27 17:11:27 -06:00
Ross Thompson
d15cb64bdf
Relocated the misalignment faults.
2022-01-27 16:03:00 -06:00
David Harris
7f91170bab
Comments in LSU code about restructuring
2022-01-27 15:53:59 +00:00
Ross Thompson
42ef1e22e5
1. Modified the cache so it can handle the reset delay internally. This removes the mux from the IFU.
...
2. Removed the write address delay from simpleram.sv
3. Fixed rv32tim and rv32ic mode to handle missalignment correctly.
4. Added imperas32i and imperas32c to rv32tim mode.
2022-01-26 18:23:39 -06:00
David Harris
8d04e83c9f
simpleram simplification
2022-01-25 19:46:13 +00:00
David Harris
a86a9f5c2a
simpleram simplification
2022-01-25 18:26:31 +00:00
David Harris
7ad2eb009a
simpleram address simplification
2022-01-25 18:00:50 +00:00
David Harris
6a555032eb
simpleram clk and reset simplification
2022-01-25 17:34:15 +00:00
Ross Thompson
9982549057
Changed the IROM and DTIM memories to behave like edge-triggered srams.
2022-01-21 15:42:54 -06:00
David Harris
07425369fc
Renamed wallypipelinedhart to wallypipelinedcore
2022-01-20 16:02:08 +00:00
David Harris
bd320c2f76
lsu cleanup down to 346 lines
2022-01-15 01:19:44 +00:00
David Harris
325724f556
LSU Cleanup
2022-01-15 01:11:17 +00:00
David Harris
6febce0001
Moved Dcache into bus block
2022-01-15 00:39:07 +00:00
David Harris
fd13272d4c
Renamed LSUStall to LSUStallM
2022-01-15 00:24:16 +00:00
David Harris
db2271b7e0
LSU cleanup
2022-01-15 00:11:30 +00:00
David Harris
dab3c754d7
LSU cleanup
2022-01-15 00:03:03 +00:00
David Harris
2bf4676ff8
LSU cleanup
2022-01-14 23:55:27 +00:00
David Harris
43abf25417
moved fp to tests
2022-01-14 23:05:59 +00:00
David Harris
218a8e6eaa
LSU partitioning
2022-01-14 23:02:28 +00:00
Ross Thompson
a973681a90
Added support for logic memory in the IFU and LSU. This disables the bus interface. Peripherals do not work. Also requires using testbench-harvard.sv. I hope to merge this testbench with the main testbench.sv soon.
2022-01-13 22:21:43 -06:00
Ross Thompson
aad28366d7
Partial local dtim in lsu configuration.
2022-01-13 17:50:31 -06:00
Ross Thompson
e6e3b0607a
Merge branch 'testDivInterruptInterlock' into main
2022-01-13 11:21:48 -06:00
Ross Thompson
66f3259984
Removed unused inputs to hptw.
2022-01-13 11:04:48 -06:00
Ross Thompson
a23e6efd5c
Fixed bug in the lsu's write back data. If an AMO was uncached it would not be corrected executed because the write data to the bus would not include the amoalu.
2022-01-12 17:41:39 -06:00
Ross Thompson
11f1613d59
Added additional fsm to ILA.
2022-01-12 14:17:16 -06:00
Ross Thompson
d8173745bb
Possible fix for the TrapM DTLBMiss suppression.
2022-01-12 14:17:16 -06:00
Ross Thompson
cd75bf98e1
If a trap occurs concurrent with a I/DTLB miss the interlock fsm incorrectly goes into the states to handle the TLB miss.
...
This commit fixes this bug by keeping the interlock fsm in the T0_READY state on TrapM.
2022-01-12 14:17:16 -06:00
Ross Thompson
73c488914f
Added icache access and icache miss to performance counters.
2022-01-09 22:56:56 -06:00
Ross Thompson
509a0cd3f8
Fixed bug with interlock fsm. The interlock fsm should suppress bus and cache requests by the cpu
...
only at the start of a request. Pending interrupt was used to start one of these suppressions;
however because of the way the cache's fsm was separated from the bus fsm, the cache now made requests
to the bus fsm. On a miss with write back, the inital fetch is handled correctly. However if an
interrupt becam pending then the the next request (eviction) made by the cache was also suppressed.
This keeps the d cache fsm stuck in the STATE_MISS_EVICT_DIRTY state as it think it has made a request
to the bus fsm, but the pending interrupt ignored the request.
The solution is to modify how cpu requests are suppressed. Instead of relying on pending interrupt
it is better to use interrupt which will be disabled if the dcache is currently processing the evict.
2022-01-07 17:55:34 -06:00
David Harris
120fb7863f
Reformatted MIT license to 95 characters
2022-01-07 12:58:40 +00:00
Ross Thompson
c8d47fc7c3
Also fixed undetected bug with amo concurrent with tlb miss. It was possible for the amoalu to apply a function to the hptw readdata.
...
Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main
2022-01-06 23:28:02 -06:00
Ross Thompson
0fddceffa6
Modified the mmu to not mux the lower 12 bits of the physical address and instead directly
...
assign from the input non translated virtual address. Since the lower bits never change there is
no reason to place these lower bits on a longer critical path.
The cache and lsu were previously using the lower bits from the virtual address rather than
the physical address. This change will allow us to keep the shorter critical path and
reduce the complexity of the lsu, ifu, and cache drawings.
2022-01-06 23:19:09 -06:00
David Harris
1d8451c2cf
Capitalized LSU and IFU, changed MulDiv to MDU
2022-01-07 04:30:00 +00:00
Ross Thompson
77efcad15b
Changed names of address in caches.
...
Removed old cache files.
2022-01-05 22:19:36 -06:00
Ross Thompson
5a2ae561a7
Updates to support fpga.
2022-01-05 18:07:23 -06:00
David Harris
32590d484c
Removed more generate statements
2022-01-05 16:25:08 +00:00
David Harris
c1d6550ccb
Removed generate statements
2022-01-05 14:35:25 +00:00
Ross Thompson
f89c1d91dc
Renamed most signals inside cache.sv so they are agnostic to i or d.
2022-01-04 23:52:42 -06:00
Ross Thompson
9eda7c12bd
the i and d caches now share common verilog.
2022-01-04 23:40:37 -06:00
Ross Thompson
b06c3b8acd
parameterized the caches with the goal of using common rtl for both i and d caches.
2022-01-04 22:40:51 -06:00
Ross Thompson
06168e67e4
Switched block for line in caches.
2022-01-04 22:08:18 -06:00
David Harris
1f07470477
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
2022-01-04 19:47:51 +00:00
David Harris
b36ace221e
Renamed wally-pipelined to pipelined
2022-01-04 19:47:41 +00:00
