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formating ahbinterface.

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This commit is contained in:
Ross Thompson 2023-01-17 22:54:42 -06:00
parent 4b47598138
commit 4bfabc4136
2 changed files with 16 additions and 16 deletions
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2
pipelined/src/ebu/ahbcacheinterface.sv
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@ -72,6 +72,7 @@ module ahbcacheinterface #(parameter BEATSPERLINE, LINELEN, LOGWPL, LLENPOVERAHB
logic [`PA_BITS-1:0] LocalHADDR; // Address after selecting between cached and uncached operation
logic [LOGWPL-1:0] BeatCountDelayed; // Beat within the cache line in the second (Data) cache stage
logic CaptureEn; // Enable updating the Fetch buffer with valid data from HRDATA
logic [`AHBW/8-1:0] BusByteMaskM; // Byte enables within a word. For cache request all 1s
logic [`AHBW-1:0] PreHWDATA; // AHB Address phase write data
genvar index;
@ -106,7 +107,6 @@ module ahbcacheinterface #(parameter BEATSPERLINE, LINELEN, LOGWPL, LLENPOVERAHB
// *** bummer need a second byte mask for bus as it is AHBW rather than LLEN.
// probably can merge by muxing PAdrM's LLEN/8-1 index bit based on HTRANS being != 0.
logic [`AHBW/8-1:0] BusByteMaskM;
swbytemask #(`AHBW) busswbytemask(.Size(HSIZE), .Adr(HADDR[$clog2(`AHBW/8)-1:0]), .ByteMask(BusByteMaskM));
flopen #(`AHBW/8) HWSTRBReg(HCLK, HREADY, BusByteMaskM[`AHBW/8-1:0], HWSTRB);

30
pipelined/src/ebu/ahbinterface.sv
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@ -31,24 +31,24 @@
`include "wally-config.vh"
module ahbinterface #(parameter LSU = 0) ( // **** modify to use LSU/ifu parameter to control widths of buses
input logic HCLK, HRESETn,
input logic HCLK, HRESETn,
// bus interface
input logic HREADY,
input logic [`XLEN-1:0] HRDATA,
output logic [1:0] HTRANS,
output logic HWRITE,
output logic [`XLEN-1:0] HWDATA,
output logic [`XLEN/8-1:0] HWSTRB,
input logic HREADY, // AHB peripheral ready
output logic [1:0] HTRANS, // AHB transaction type, 00: IDLE, 10 NON_SEQ, 11 SEQ
output logic HWRITE, // AHB 0: Read operation 1: Write operation
input logic [`XLEN-1:0] HRDATA, // AHB read data
output logic [`XLEN-1:0] HWDATA, // AHB write data
output logic [`XLEN/8-1:0] HWSTRB, // AHB byte mask
// lsu/ifu interface
input logic Flush,
input logic [1:0] BusRW,
input logic [`XLEN/8-1:0] ByteMask,
input logic [`XLEN-1:0] WriteData,
input logic Stall,
output logic BusStall,
output logic BusCommitted,
output logic [(LSU ? `XLEN : 32)-1:0] FetchBuffer
input logic Stall, // Core pipeline is stalled
input logic Flush, // Pipeline stage flush. Prevents bus transaction from starting
input logic [1:0] BusRW, // Memory operation read/write control: 10: read, 01: write
input logic [`XLEN/8-1:0] ByteMask, // Bytes enables within a word
input logic [`XLEN-1:0] WriteData, // IEU write data for a store
output logic BusStall, // Bus is busy with an in flight memory operation
output logic BusCommitted, // Bus is busy with an in flight memory operation and it is not safe to take an interrupt
output logic [(LSU ? `XLEN : 32)-1:0] FetchBuffer // Register to hold HRDATA after arriving from the bus
);
logic CaptureEn;