diff options
Diffstat (limited to 'eth/mac_rxfifo_int.v')
-rw-r--r-- | eth/mac_rxfifo_int.v | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/eth/mac_rxfifo_int.v b/eth/mac_rxfifo_int.v deleted file mode 100644 index 6f6c5ed38..000000000 --- a/eth/mac_rxfifo_int.v +++ /dev/null @@ -1,91 +0,0 @@ - -module mac_rxfifo_int - (input clk, input rst, - - input Rx_mac_empty, - output Rx_mac_rd, - input [31:0] Rx_mac_data, - input [1:0] Rx_mac_BE, - input Rx_mac_sop, - input Rx_mac_eop, - input Rx_mac_err, - - output [31:0] wr_dat_o, - output wr_write_o, - output wr_done_o, - output wr_error_o, - input wr_ready_i, - input wr_full_i, - - // FIFO Status - output [15:0] fifo_occupied, - output fifo_full, - output fifo_empty - ); - - // Write side of short FIFO - // Inputs: full, Rx_mac_empty, Rx_mac_sop, Rx_mac_eop, Rx_mac_err, Rx_mac_data/BE - // Controls: write, datain, Rx_mac_rd - - wire write, full, read, empty, sop_o, eop_o, error_o; - - // Write side of short FIFO - assign write = ~full & ~Rx_mac_empty; - assign Rx_mac_rd = write; - -`define LONGFIFO 0 - -`ifdef LONGFIFO - cascadefifo2 #(.WIDTH(35),.SIZE(10)) mac_rx_longfifo - (.clk(clk),.rst(rst),.clear(0), - .datain({Rx_mac_sop,Rx_mac_eop,Rx_mac_err,Rx_mac_data}),.write(write),.full(full), - .dataout({sop_o,eop_o,error_o,wr_dat_o}),.read(read),.empty(empty), - .space(), .occupied(fifo_occupied) ); -`else - shortfifo #(.WIDTH(35)) mac_rx_sfifo - (.clk(clk),.rst(rst),.clear(0), - .datain({Rx_mac_sop,Rx_mac_eop,Rx_mac_err,Rx_mac_data}),.write(write),.full(full), - .dataout({sop_o,eop_o,error_o,wr_dat_o}),.read(read),.empty(empty), - .space(), .occupied(fifo_occupied[4:0]) ); - assign fifo_occupied[15:5] = 0; -`endif - - assign fifo_full = full; - assign fifo_empty = empty; - - // Read side of short FIFO - // Inputs: empty, dataout, wr_ready_i, wr_full_i - // Controls: read, wr_dat_o, wr_write_o, wr_done_o, wr_error_o - - reg [1:0] rd_state; - localparam RD_IDLE = 0; - localparam RD_HAVEPKT = 1; - localparam RD_XFER = 2; - localparam RD_ERROR = 3; - - always @(posedge clk) - if(rst) - rd_state <= RD_IDLE; - else - case(rd_state) - RD_IDLE : - if(sop_o & ~empty) - rd_state <= RD_HAVEPKT; - RD_HAVEPKT : - if(wr_ready_i) - rd_state <= RD_XFER; - RD_XFER : - if(eop_o & ~empty) - rd_state <= RD_IDLE; - else if(wr_full_i) - rd_state <= RD_HAVEPKT; - RD_ERROR : - rd_state <= RD_IDLE; - endcase // case(rd_state) - - assign read = ~empty & ((rd_state == RD_XFER) | ((rd_state==RD_IDLE)&~sop_o)); - assign wr_write_o = ~empty & (rd_state == RD_XFER); - assign wr_done_o = ~empty & (rd_state == RD_XFER) & eop_o; - assign wr_error_o = ~empty & (rd_state == RD_XFER) & error_o; - -endmodule // mac_rxfifo_int |