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304 Commits

Author SHA1 Message Date
Ross Thompson
35d0b759d1 Removed ignore request from busfsm. 2022-08-28 21:12:27 -05:00
Ross Thompson
dd00474956 Created two new pma regions for dtim and irom. 2022-08-28 13:50:50 -05:00
Ross Thompson
99e0e5c817 Possible fix. 2022-08-28 13:10:47 -05:00
David Harris
35d0a951d2 Preliminary work to make DTIM and Bus compatible. Not yet working because accesses to bus are causing illegal address faults on the bus. 2022-08-27 20:31:09 -07:00
David Harris
921a49921b Set correct size of IROM/DTIM and allow FLEN>XLEN with DTIM 2022-08-26 21:05:20 -07:00
David Harris
6409548c8b Replaced DTIM and IROM with DTIM_SUPPORTED, IROM_SUPPORTED, and base and range for each 2022-08-26 20:26:12 -07:00
David Harris
af2e71046e Fixed rv32e LSU and IFU issues 2022-08-25 20:02:38 -07:00
Ross Thompson
e70c90d351 Finally resolved the issues with the rv32ic and rv64ic configurations. 2022-08-25 16:00:55 -05:00
Ross Thompson
ad3e632119 Almost fixed issues with irom and dtim address selection. 2022-08-25 15:52:25 -05:00
Ross Thompson
32f86b1b6b Still not working with rv32ic. 2022-08-25 15:03:54 -05:00
Ross Thompson
502eb0f5d1 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-08-25 14:40:52 -05:00
David Harris
d7be94fab2 Cleaned up SelBusWord 2022-08-25 11:18:13 -07:00
David Harris
7a129af9ad Removed M sufix from busdp signals 2022-08-25 11:13:01 -07:00
David Harris
84ba62a04c Renamed LSUFunct3M to Funct3 in busdp 2022-08-25 11:08:12 -07:00
David Harris
78618f5fc0 Renaming LSU signals from busdp 2022-08-25 11:05:10 -07:00
David Harris
cd02c894df renamed BusBuffer to FetchBuffer 2022-08-25 10:44:39 -07:00
David Harris
5dc4fb757a Continued busdp/ebu simplification 2022-08-25 10:20:02 -07:00
David Harris
89860588b8 Renamed AHB signals coming out of LSU to LSH_<AHBNAME> 2022-08-25 09:52:08 -07:00
Ross Thompson
bd9401179d BROKEN. Don't use this commit. 
Issue running cacheless with bus.
 2022-08-25 11:02:46 -05:00
David Harris
4ecdbb308a Renamed DCache to Cache in busdp/busfsm signal interface 2022-08-25 06:21:22 -07:00
David Harris
a3828420c0 Replaced dtim with rom-based IROM in IFU. Moved cache control signals out of DTIM and IROM 2022-08-25 04:06:27 -07:00
Ross Thompson
c6927d2ace Modified the lsu/ifu memory configurations. 2022-08-24 12:35:15 -05:00
Ross Thompson
cd0da2e3b3 Updated the names of the *WriteDataM inside the LSU to more meaningful names. 
Moved the FWriteDataMux so that the bus and dtim both get fpu stores.
Modified the PMA to disallow double sized reads when XLEN=32.
 2022-08-23 10:34:39 -05:00
Ross Thompson
21526957cf Updated fpga test bench. 
Solved read delay cache bug.  Introduced during cache optimizations.
 2022-08-21 15:59:54 -05:00
Ross Thompson
96d6218078 Possible reduction of ignorerequest. 2022-08-19 18:07:44 -05:00
Ross Thompson
5301444a61 Changed signal names. 2022-08-17 16:12:04 -05:00
Ross Thompson
970a90dd72 Better name for LSUBusWriteCrit. Changed to SelLSUBusWord. 2022-08-17 16:09:20 -05:00
Ross Thompson
f7e64fcd69 Fixed fstore2 in cache? 2022-08-01 22:04:44 -05:00
Ross Thompson
171cf7413b Replaced LOGWPL with LOGBWPL (Bus words per line) and LOGCWPL (cache words per line). Replaced with wordlen/8 bytemask. 2022-08-01 21:08:14 -05:00
Ross Thompson
5cd6c8069d signal name cleanup. 2022-07-22 23:36:27 -05:00
Katherine Parry
ca4fe08fd9 renamed FLoad2 to FStore2 2022-07-09 00:26:45 +00:00
Katherine Parry
cd53ae67d9 moved fpu ieu write data mux to lsu 2022-07-08 23:56:57 +00:00
Madeleine Masser-Frye
cb33d2289b fixed width mismatch for rv64 ieuadrM and readdatawordM 2022-07-06 22:39:35 +00:00
Katherine Parry
6baded9121 added rv32 double precision stores - untested 2022-06-28 21:33:31 +00:00
slmnemo
054cf5f7b0 Reworked AHB fsm to support one cycle latency read and writes, renamed key signals to better reflect their use, and fixed HTRANS errors 2022-06-08 15:03:15 -07:00
slmnemo
284e0395a0 Merge branch 'main' into cacheburstmode 2022-06-08 02:21:33 +00:00
slmnemo
2d76953d42 Added lock signal to ensure AHB speaks with the right bus 2022-06-08 02:19:21 +00:00
slmnemo
73e0c1c07f Reworked bus to handle burst interfacing 2022-06-07 11:22:53 +00:00
David Harris
c7ec9282fe Provided sfencevmaM to hazard unit and renamed TLBFlush signals to sfencevma going into LSU/IFU. Preparing for SFENCE.VMA to flush the pipeline, but that is not yet working. 2022-06-02 14:18:55 +00:00
slmnemo
847c7930c4 added LSUBurstDone signal to signal when a burst has finished 2022-05-26 16:29:13 -07:00
slmnemo
08430a1e85 added burst size signals to the IFU, EBU, LSU, and busdp 2022-05-25 18:02:50 -07:00
slmnemo
8c8a7daec2 Fixed grammar on two comments in bpred.sv 2022-05-16 22:41:18 +00:00
David Harris
ce24c080d5 More unused signal cleanup 2022-05-12 15:26:08 +00:00
David Harris
5670f77de2 More unused signal cleanup 2022-05-12 15:21:09 +00:00
David Harris
1a7599ce94 Changed WFI to stall pipeline in memory stage 2022-05-05 02:03:44 +00:00
Kip Macsai-Goren
bd87af478a Changed mtval for instruction misaligned fault to get address from ieuAdrM (Jal/branch target address) 2022-04-22 22:46:11 +00:00
David Harris
eaa0d44980 Fixed WFI decoding in IFU 2022-04-18 19:02:08 +00:00
Shreya Sanghai
6f0085201b replaced k with bpred size 2022-04-18 04:21:03 +00:00
David Harris
0932d4df46 Added WFI support to IFU to keep it in the pipeline 2022-04-14 17:26:17 +00:00
Ross Thompson
396f697d2f Hacky fix to prevent ITLBMissF and TrapM bug. 2022-04-12 17:56:23 -05:00
bbracker
69a0f6e00b big interrupts refactor 2022-03-30 13:22:41 -07:00
Ross Thompson
e4f4e1bd43 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-03-30 11:09:44 -05:00
David Harris
c4f2c6b110 fpu compare simplification, minor cleanup 2022-03-29 17:11:28 +00:00
Ross Thompson
fe896bff8e Found a way to remove a bus input into MMU. PAdr can be made into VAdr by selecting the faulting virtual address when writing the DTLB. 2022-03-24 23:47:28 -05:00
Ross Thompson
ee4b38dce3 dtim writes are supressed on non cacheable operation. 2022-03-12 00:46:11 -06:00
Ross Thompson
67ff8f27f4 Can now support the following memory and bus configurations. 
1. dtim/irom only
2. bus only
3. dtim/irom + bus
4. caches + bus
 2022-03-11 15:18:56 -06:00
Ross Thompson
9dce2a0679 Towards allowing dtim + bus. 2022-03-11 14:58:21 -06:00
Ross Thompson
b7a680ec2a Moved subcachelineread inside the cache. There is some ugliness to still resolve. 2022-03-11 12:44:04 -06:00
Ross Thompson
a18f06c20b Moved subcacheline read inside the cache. 2022-03-11 11:03:36 -06:00
Ross Thompson
52cc852600 removed unused parameter. 2022-03-11 10:43:54 -06:00
Ross Thompson
6d914def08 Name cleanup. 2022-03-10 18:44:50 -06:00
Ross Thompson
63b1ea88c9 Signal name cleanup. 2022-03-10 18:26:58 -06:00
Ross Thompson
396c97fc36 Byte write enables are passing all configs now. 2022-03-10 17:26:32 -06:00
Ross Thompson
7a129c75cd Added byte write enables to cache SRAMs. 2022-03-10 15:48:31 -06:00
David Harris
bc2b757952 bit write update 2022-03-09 19:09:20 +00:00
David Harris
27f09ffb33 Refactored SRAM bit write enable 2022-03-09 17:49:28 +00:00
Ross Thompson
3ec32d7ce8 Removed unused signal. 2022-03-08 16:58:26 -06:00
Ross Thompson
d78ba777a4 Added parameter to spillsupport. 2022-03-08 16:38:48 -06:00
Ross Thompson
7b96b3f73c Moved cacheable signal into cache. 2022-03-08 16:34:02 -06:00
Ross Thompson
730fdb029a Fixed bug with DAPageFault being wrong when HPTW writes not supported. 2022-02-23 10:54:34 -06:00
Ross Thompson
6f53f7943f More spillsupport more structual. 2022-02-23 10:27:14 -06:00
Ross Thompson
19ec874641 Fixed bug with spill support and Instruction DA Page Faults. 2022-02-23 10:16:12 -06:00
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
8a280f211f Annotated IFU for mux changes. 2022-02-21 17:20:34 -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
David Harris
1d5c8a7b98 t push 
Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main
 2022-02-14 01:22:22 +00:00
Ross Thompson
7ffbc6b2ab Changed names of signals in cache. 2022-02-13 15:06:18 -06:00
David Harris
b360e7b941 Synthesis cleanup 2022-02-12 06:25:12 +00:00
Ross Thompson
febd019854 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-02-11 10:47:21 -06:00
Ross Thompson
6d12010d02 Fixed subtle and infrequenct bug. 
Loading buildroot at 483M instructions started with a spill + ITLBMiss.  The spillsupport logic allowed transition to the second access only after the bus/cache completed the first operation.  However the BusStall was suppressed if ITLBMissF occurs resulting in the spillfsm advancing to the second operation.  Now the spill logic also takes in ITLBMissF and prevents the early transition to the second access.
 2022-02-11 10:46:06 -06:00
David Harris
de5e80696d Cleaned up synthesis warnings 2022-02-11 01:15:16 +00:00
Ross Thompson
689c32215f Fixed bugs in ifu spills and missing reset on bus data register. 2022-02-10 18:11:57 -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
c2907ec0f4 Cleanup IFU. 2022-02-08 14:54:53 -06:00
Ross Thompson
e02bc8db67 rv32e works for now. Still need to optimize. 2022-02-08 14:21:55 -06:00
Ross Thompson
f211fe635a Moved some muxes back into the bp. 2022-02-08 14:17:44 -06:00
Ross Thompson
aa12d90272 Temporary commit which gets the no branch predictor implementation working. 2022-02-08 14:13:55 -06:00
Ross Thompson
8a2ee22395 Finished merge. 2022-02-08 11:36:24 -06:00
David Harris
9b55848ffc Added E tests to wally-riscv-arch-test rv32i_m/I and fixed cyclic path in rv32e configuration 2022-02-06 01:22:40 +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
David Harris
72bc64ef28 Temporarily changed rv32e config to use TIM, but it still fails. Added rv32e tests. 2022-02-05 04:16:18 +00:00
Ross Thompson
290430cda8 Moved the sub cache line read logic to lsu/ifu. 2022-02-04 20:42:53 -06:00
David Harris
da8819d64b changed DMEM and IMEM configurations to support BUS/TIM/CACHE 2022-02-03 00:41:09 +00:00
Ross Thompson
6c5b0bec40 More cleanup of IFU. 2022-02-01 14:32:27 -06:00
Ross Thompson
1f0821da0d IFU and LSU now share the same busdp module. 2022-01-31 16:25:41 -06:00
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
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
2e00186eea Updated wave.do to match the ifu/lsu changes. 2022-01-28 14:37:15 -06:00
Ross Thompson
42d60235f0 Clean up of mmu instances in IFU and LSU. 2022-01-28 14:02:05 -06:00
Ross Thompson
c5e0024e9f Moved spills to own module. 2022-01-28 13:40:35 -06:00
Ross Thompson
06209c417f Cleaned up the InstrMisalignedFault. 2022-01-28 13:19:24 -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
David Harris
30cc27e719 IFU cleanup 2022-01-27 17:18:55 +00:00
David Harris
5ab06fef20 IFU cleanup 2022-01-27 16:41:57 +00:00
David Harris
bdd5796f3a Optimized out second adder from IFU for PC+2 2022-01-27 16:06:24 +00:00
Ross Thompson
db0a0bd29e BPPredWrongM needs to be 0 when there is no branch predictor. BPPredWRongM is only used when there is an icacheflush. 2022-01-27 07:59:59 -06:00
Ross Thompson
cc5a9a015b Removed mux in PCNextF logic. Minor IFU improvements. 2022-01-26 22:33:26 -06:00
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
Ross Thompson
fc86651937 IFU simplifications. 2022-01-26 13:54:59 -06:00
Ross Thompson
840e814e95 Merge branch 'main' of github.com:davidharrishmc/riscv-wally into main 2022-01-25 19:21:04 -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
David Harris
cf50beb958 Start of IFU cleanup 2022-01-25 17:31:53 +00:00
Ross Thompson
8ef70389d3 Added spill support back into the IROM IFU. 2022-01-21 15:50:54 -06:00
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
Ross Thompson
acec56c27e Added PCNextF and PostSpillInstrRawF to ila. 2022-01-19 14:05:14 -06:00
Ross Thompson
03010845f5 Fixed spillthreshold warning. 2022-01-14 17:23:39 -06:00
Ross Thompson
73ad5715f4 Cleanup IFU comments. 2022-01-14 15:06:30 -06:00
Ross Thompson
b8f4eb2997 Optimization in the ifu. Please note this optimization is not strictly correct, 
but is possible.  See comments in the ifu source code for details.
 2022-01-14 12:16:48 -06:00
Ross Thompson
2e8f5e06bd More ifu cleanup. 2022-01-14 11:19:12 -06:00
Ross Thompson
3bec276862 Added tim only test to regression-wally. Minor cleanup to ifu. 2022-01-14 11:13:06 -06:00
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
85b5dc08a8 Fixed support to allow spills and no icache. 2022-01-12 17:25:16 -06:00
Ross Thompson
459f4bd3b4 Hack "fix" to prevent interrupt from occuring during an integer divide. 
This is not the desired solution but will allow continued debuging of linux.
 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
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