91 lines
2.5 KiB
Systemverilog
Executable File
91 lines
2.5 KiB
Systemverilog
Executable File
`ifndef __MP_FIFO_SV__
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`define __MP_FIFO_SV__
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module mp_fifo
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#(
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parameter type payload_t = logic[3:0],
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parameter int unsigned ENQUEUE_WIDTH = 4,
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parameter int unsigned DEQUEUE_WIDTH = 4,
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parameter int unsigned DEPTH = 16,
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parameter int unsigned MUST_TAKEN_ALL = 1
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)
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(
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// Enqueue
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input logic[ENQUEUE_WIDTH-1:0] enqueue_vld_i,
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input payload_t[ENQUEUE_WIDTH-1:0] enqueue_payload_i,
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output logic[ENQUEUE_WIDTH-1:0] enqueue_rdy_o,
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// Dequeue
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output logic[DEQUEUE_WIDTH-1:0] dequeue_vld_o,
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output payload_t[DEQUEUE_WIDTH-1:0] dequeue_payload_o,
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input logic[DEQUEUE_WIDTH-1:0] dequeue_rdy_i,
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input logic flush_i,
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input clk,
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input rst
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);
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localparam int unsigned ENTRY_PTR_WIDTH = $clog2(DEPTH);
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localparam int unsigned ENTRY_CNT_WIDTH = $clog2(DEPTH+1);
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logic[ENQUEUE_WIDTH-1:0][ENTRY_PTR_WIDTH-1:0] enq_ptr;
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logic[DEQUEUE_WIDTH-1:0][ENTRY_PTR_WIDTH-1:0] deq_ptr;
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logic[ENTRY_CNT_WIDTH-1:0] avail_cnt;
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payload_t[DEPTH-1:0] payload_dff;
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logic[ENQUEUE_WIDTH-1:0] enq_fire;
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logic[DEQUEUE_WIDTH-1:0] deq_fire;
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assign enq_fire = enqueue_vld_i & enqueue_rdy_o;
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assign deq_fire = dequeue_vld_o & dequeue_rdy_i;
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generate
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for(genvar i = 0 ; i < DEQUEUE_WIDTH; i++) begin
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assign dequeue_payload_o[i] = payload_dff[deq_ptr[i]];
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assign dequeue_vld_o[i] = (DEPTH-avail_cnt) > i;
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end
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endgenerate
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generate
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if(MUST_TAKEN_ALL) begin
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assign enqueue_rdy_o = {ENQUEUE_WIDTH{avail_cnt >= ENQUEUE_WIDTH}};
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end else begin
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for(genvar i = 0; i < ENQUEUE_WIDTH; i++) begin
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assign enqueue_rdy_o[i] = avail_cnt > i;
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end
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end
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endgenerate
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always_ff@(posedge clk) begin : payload_dff_update
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for(int i = 0; i < ENQUEUE_WIDTH; i++) begin
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if(enq_fire[i]) begin
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payload_dff[enq_ptr[i]] <= enqueue_payload_i[i];
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end
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end
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end
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usage_manager #(
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.ENTRY_COUNT(DEPTH),
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.ENQ_WIDTH(ENQUEUE_WIDTH),
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.DEQ_WIDTH(DEQUEUE_WIDTH),
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.FLAG_EN(0),
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.INIT_IS_FULL(0),
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.COMB_DEQ_EN(0),
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.COMB_ENQ_EN(1)
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) u_usage_manager (
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.enq_fire_i(enq_fire),
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.deq_fire_i(deq_fire),
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.head_o(deq_ptr),
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.tail_o(enq_ptr),
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.avail_cnt_o(avail_cnt),
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.flush_i(flush_i),
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.clk(clk),
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.rst(rst)
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);
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endmodule : mp_fifo
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`endif |