Everything except bank internals

rtl/VX_cache/VX_cache_dfq_queue.v

@@ -0,0 +1,78 @@
+`include "VX_cache_config.v"
+
+module VX_cache_dfq_queue
+	(
+	input  wire                          clk,
+	input  wire                          reset,
+	input  wire                          dfqq_push,
+    input  wire[`NUMBER_BANKS-1:0]       per_bank_dram_fill_req,
+    input  wire[`NUMBER_BANKS-1:0][31:0] per_bank_dram_fill_req_addr,
+
+	input  wire            dfqq_pop,
+    output wire            dfqq_req,
+    output wire[31:0]      dfqq_req_addr,
+	output wire            dfqq_empty,
+	output wire            dfqq_full
+);
+
+    wire[`NUMBER_BANKS-1:0]       out_per_bank_dram_fill_req;
+    wire[`NUMBER_BANKS-1:0][31:0] out_per_bank_dram_fill_req_addr;
+
+
+    reg [`NUMBER_BANKS-1:0]       use_per_bank_dram_fill_req;
+    reg [`NUMBER_BANKS-1:0][31:0] use_per_bank_dram_fill_req_addr;
+
+
+    wire[`NUMBER_BANKS-1:0]       qual_bank_dram_fill_req;
+    wire[`NUMBER_BANKS-1:0][31:0] qual_bank_dram_fill_req_addr;
+
+    wire[`NUMBER_BANKS-1:0]       updated_bank_dram_fill_req;
+
+	wire use_empty = !(|use_per_bank_dram_fill_req);
+	wire out_empty = !(|out_per_bank_dram_fill_req);
+
+	wire push_qual = dfqq_push && !dfqq_full;
+	wire pop_qual  = dfqq_pop  && use_empty && !out_empty && !dfqq_empty;
+	VX_generic_queue #(.DATAW(`NUMBER_BANKS * (1+32)), .SIZE(`dFQQ_SIZE)) dfqq_queue(
+		.clk     (clk),
+		.reset   (reset),
+		.push    (push_qual),
+		.in_data ({per_bank_dram_fill_req, per_bank_dram_fill_req_addr}),
+		.pop     (pop_qual),
+		.out_data({out_per_bank_dram_fill_req, out_per_bank_dram_fill_req_addr}),
+		.empty   (dfqq_empty),
+		.full    (dfqq_full)
+		);
+
+
+
+	assign qual_bank_dram_fill_req      = use_empty ? out_per_bank_dram_fill_req      : use_per_bank_dram_fill_req; 
+	assign qual_bank_dram_fill_req_addr = use_empty ? out_per_bank_dram_fill_req_addr : use_per_bank_dram_fill_req_addr;
+
+	wire[`vx_clog2(`NUMBER_BANKS)-1:0] qual_request_index;
+	wire                               qual_has_request;
+	VX_generic_priority_encoder #(.N(`NUMBER_BANKS)) VX_sel_bank(
+		.valids(qual_bank_dram_fill_req),
+		.index (qual_request_index),
+		.found (qual_has_request)
+		);
+
+	assign dfqq_req      = qual_bank_dram_fill_req     [qual_request_index];
+	assign dfqq_req_addr = qual_bank_dram_fill_req_addr[qual_request_index];
+
+	assign updated_bank_dram_fill_req = qual_bank_dram_fill_req & (~(1 << qual_request_index));
+
+	always @(posedge clk or reset) begin
+		if (reset) begin
+			use_per_bank_dram_fill_req      <= 0;
+			use_per_bank_dram_fill_req_addr <= 0;
+		end else begin
+			if (dfqq_pop && qual_has_request) begin
+				use_per_bank_dram_fill_req      <= updated_bank_dram_fill_req;
+				use_per_bank_dram_fill_req_addr <= qual_bank_dram_fill_req_addr;
+			end
+		end
+	end
+
+
+endmodule