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More cleanup of dcache.

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This commit is contained in:
Ross Thompson 2021-12-28 14:12:18 -06:00
parent 22bfc80e62
commit b6f4efd458
2 changed files with 7 additions and 22 deletions
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18
wally-pipelined/src/cache/dcache.sv vendored
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@ -38,7 +38,6 @@ module dcache
input logic FlushDCacheM, input logic FlushDCacheM,
input logic [11:0] MemAdrE, // virtual address, but we only use the lower 12 bits. input logic [11:0] MemAdrE, // virtual address, but we only use the lower 12 bits.
input logic [`PA_BITS-1:0] MemPAdrM, // physical address input logic [`PA_BITS-1:0] MemPAdrM, // physical address
input logic [11:0] VAdr, // when hptw writes dtlb we use this address to index SRAM.
input logic [`XLEN-1:0] FinalWriteDataM, input logic [`XLEN-1:0] FinalWriteDataM,
output logic [`XLEN-1:0] ReadDataWordM, output logic [`XLEN-1:0] ReadDataWordM,
@ -63,14 +62,7 @@ module dcache
// inputs from TLB and PMA/P // inputs from TLB and PMA/P
input logic CacheableM, input logic CacheableM,
// from ptw // from ptw
input logic IgnoreRequest, input logic IgnoreRequest
// ahb side
/* -----\/----- EXCLUDED -----\/-----
(* mark_debug = "true" *)output logic AHBRead,
(* mark_debug = "true" *)output logic AHBWrite,
-----/\----- EXCLUDED -----/\----- */
(* mark_debug = "true" *)input logic AHBAck, // from ahb
(* mark_debug = "true" *)output logic [2:0] DCtoAHBSizeM
); );
localparam integer BLOCKLEN = `DCACHE_BLOCKLENINBITS; localparam integer BLOCKLEN = `DCACHE_BLOCKLENINBITS;
@ -139,9 +131,8 @@ module dcache
mux4 #(INDEXLEN) mux4 #(INDEXLEN)
AdrSelMux(.d0(MemAdrE[INDEXLEN+OFFSETLEN-1:OFFSETLEN]), AdrSelMux(.d0(MemAdrE[INDEXLEN+OFFSETLEN-1:OFFSETLEN]),
.d1(VAdr[INDEXLEN+OFFSETLEN-1:OFFSETLEN]), // *** REMOVE .d1(0), // *** REMOVE
.d2(MemPAdrM[INDEXLEN+OFFSETLEN-1:OFFSETLEN]), .d2(MemPAdrM[INDEXLEN+OFFSETLEN-1:OFFSETLEN]),
//.d2(VAdr[INDEXLEN+OFFSETLEN-1:OFFSETLEN]),
.d3(FlushAdr), .d3(FlushAdr),
.s(SelAdrM), .s(SelAdrM),
.y(RAdr)); .y(RAdr));
@ -242,7 +233,6 @@ module dcache
.y(SRAMWriteData)); .y(SRAMWriteData));
//assign HWDATA = CacheableM | SelFlush ? ReadDataBlockSetsM[FetchCount] : WriteDataM;
mux3 #(`PA_BITS) BaseAdrMux(.d0(MemPAdrM), mux3 #(`PA_BITS) BaseAdrMux(.d0(MemPAdrM),
.d1({VictimTag, MemPAdrM[INDEXLEN+OFFSETLEN-1:OFFSETLEN], {{OFFSETLEN}{1'b0}}}), .d1({VictimTag, MemPAdrM[INDEXLEN+OFFSETLEN-1:OFFSETLEN], {{OFFSETLEN}{1'b0}}}),
.d2({VictimTag, FlushAdr, {{OFFSETLEN}{1'b0}}}), .d2({VictimTag, FlushAdr, {{OFFSETLEN}{1'b0}}}),
@ -274,10 +264,6 @@ module dcache
assign FlushAdrFlag = FlushAdr == FlushAdrThreshold[INDEXLEN-1:0] & FlushWay[NUMWAYS-1]; assign FlushAdrFlag = FlushAdr == FlushAdrThreshold[INDEXLEN-1:0] & FlushWay[NUMWAYS-1];
generate
if (`XLEN == 32) assign DCtoAHBSizeM = CacheableM | SelFlush ? 3'b010 : Funct3M;
else assign DCtoAHBSizeM = CacheableM | SelFlush ? 3'b011 : Funct3M;
endgenerate;
//assign SRAMWriteEnable = SRAMBlockWriteEnableM | SRAMWordWriteEnableM; //assign SRAMWriteEnable = SRAMBlockWriteEnableM | SRAMWordWriteEnableM;

11
wally-pipelined/src/lsu/lsu.sv
View File

@ -331,7 +331,6 @@ module lsu
.AtomicM(LsuAtomicM), .AtomicM(LsuAtomicM),
.MemAdrE(DCAdrE), .MemAdrE(DCAdrE),
.MemPAdrM, .MemPAdrM,
.VAdr(IEUAdrM[11:0]), // this will be removed once the dcache hptw interlock is removed.
.FinalWriteDataM, .ReadDataWordM, .DCacheStall, .FinalWriteDataM, .ReadDataWordM, .DCacheStall,
.CommittedM(DCCommittedM), .CommittedM(DCCommittedM),
.DCacheMiss, .DCacheAccess, .IgnoreRequest, .DCacheMiss, .DCacheAccess, .IgnoreRequest,
@ -343,11 +342,7 @@ module lsu
.DCacheMemWriteData, .DCacheMemWriteData,
.DCFetchLine, .DCFetchLine,
.DCWriteLine, .DCWriteLine,
.BUSACK, .BUSACK
// AHB connection
.AHBAck(1'b0),
.DCtoAHBSizeM
); );
@ -380,6 +375,10 @@ module lsu
assign DCtoAHBWriteData = CacheableM | SelFlush ? DC_HWDATA_FIXNAME : WriteDataM; assign DCtoAHBWriteData = CacheableM | SelFlush ? DC_HWDATA_FIXNAME : WriteDataM;
generate
if (`XLEN == 32) assign DCtoAHBSizeM = CacheableM | SelFlush ? 3'b010 : LsuFunct3M;
else assign DCtoAHBSizeM = CacheableM | SelFlush ? 3'b011 : LsuFunct3M;
endgenerate;
// Bus Side logic // Bus Side logic
// register the fetch data from the next level of memory. // register the fetch data from the next level of memory.