snooping response handling

hw/rtl/cache/VX_snp_rsp_arb.v

@@ -0,0 +1,38 @@
+`include "VX_cache_config.vh"
+
+module VX_snp_rsp_arb #(
+    parameter NUM_BANKS         = 0,
+    parameter BANK_LINE_SIZE    = 0,
+    parameter SNP_REQ_TAG_WIDTH = 0
+) (
+    input  wire [NUM_BANKS-1:0]         per_bank_snp_rsp_valid,
+    input  wire [NUM_BANKS-1:0][SNP_REQ_TAG_WIDTH-1:0] per_bank_snp_rsp_tag,
+    output wire [NUM_BANKS-1:0]         per_bank_snp_rsp_ready,
+
+    output wire                         snp_rsp_valid,
+    output wire [SNP_REQ_TAG_WIDTH-1:0] snp_rsp_tag,
+    input  wire                         snp_rsp_ready    
+);
+
+    wire [NUM_BANKS-1:0] qual_per_bank_snp_rsp = per_bank_snp_rsp_valid & {NUM_BANKS{snp_rsp_ready}};
+
+    wire [`BANK_BITS-1:0] fsq_bank;
+    wire                  fsq_valid;
+
+    VX_generic_priority_encoder #(
+        .N(NUM_BANKS)
+    ) sel_ffsq (
+        .valids (qual_per_bank_snp_rsp),
+        .index  (fsq_bank),
+        .found  (fsq_valid)
+    );
+
+    assign snp_rsp_valid = fsq_valid;
+    assign snp_rsp_tag   = per_bank_snp_rsp_tag[fsq_bank];
+
+    genvar i;
+    for (i = 0; i < NUM_BANKS; i++) begin
+        assign per_bank_snp_rsp_ready[i] = fsq_valid && (fsq_bank == `BANK_BITS'(i));
+    end
+
+endmodule