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up_axi- writes dropped by delayed w-responses

main
Rejeesh Kutty 2016-08-14 11:21:19 -04:00
parent 39c1c83d00
commit e754f0a46a
1 changed files with 36 additions and 52 deletions
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88
library/common/up_axi.v
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@ -34,8 +34,6 @@
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// ***************************************************************************
// ***************************************************************************
// ***************************************************************************
// ***************************************************************************
`timescale 1ns/100ps
@ -123,24 +121,27 @@ module up_axi (
reg up_axi_awready = 'd0;
reg up_axi_wready = 'd0;
reg up_axi_bvalid = 'd0;
reg up_wack_d = 'd0;
reg up_wsel = 'd0;
reg up_wreq = 'd0;
reg [AW:0] up_waddr = 'd0;
reg [31:0] up_wdata = 'd0;
reg [ 2:0] up_wcount = 'd0;
reg up_wack_int = 'd0;
reg up_wack_int_d = 'd0;
reg [ 4:0] up_wcount = 'd0;
reg up_axi_arready = 'd0;
reg up_axi_rvalid = 'd0;
reg [31:0] up_axi_rdata = 'd0;
reg up_rack_d = 'd0;
reg [31:0] up_rdata_d = 'd0;
reg up_rsel = 'd0;
reg up_rreq = 'd0;
reg [AW:0] up_raddr = 'd0;
reg [ 4:0] up_rcount = 'd0;
reg up_rack_int = 'd0;
reg [31:0] up_rdata_int = 'd0;
reg up_rack_int_d = 'd0;
reg [31:0] up_rdata_int_d = 'd0;
// internal signals
wire up_wack_s;
wire up_rack_s;
wire [31:0] up_rdata_s;
// write channel interface
@ -154,30 +155,34 @@ module up_axi (
end else begin
if (up_axi_awready == 1'b1) begin
up_axi_awready <= 1'b0;
end else if (up_wack_int == 1'b1) begin
end else if (up_wack_s == 1'b1) begin
up_axi_awready <= 1'b1;
end
if (up_axi_wready == 1'b1) begin
up_axi_wready <= 1'b0;
end else if (up_wack_int == 1'b1) begin
end else if (up_wack_s == 1'b1) begin
up_axi_wready <= 1'b1;
end
if ((up_axi_bready == 1'b1) && (up_axi_bvalid == 1'b1)) begin
up_axi_bvalid <= 1'b0;
end else if (up_wack_int_d == 1'b1) begin
end else if (up_wack_d == 1'b1) begin
up_axi_bvalid <= 1'b1;
end
end
end
assign up_wack_s = (up_wcount == 5'h1f) ? 1'b1 : (up_wcount[4] & up_wack);
always @(negedge up_rstn or posedge up_clk) begin
if (up_rstn == 1'b0) begin
up_wack_d <= 'd0;
up_wsel <= 'd0;
up_wreq <= 'd0;
up_waddr <= 'd0;
up_wdata <= 'd0;
up_wcount <= 'd0;
end else begin
up_wack_d <= up_wack_s;
if (up_wsel == 1'b1) begin
if ((up_axi_bready == 1'b1) && (up_axi_bvalid == 1'b1)) begin
up_wsel <= 1'b0;
@ -185,28 +190,19 @@ module up_axi (
up_wreq <= 1'b0;
up_waddr <= up_waddr;
up_wdata <= up_wdata;
up_wcount <= up_wcount + 1'b1;
end else begin
up_wsel <= up_axi_awvalid & up_axi_wvalid;
up_wreq <= up_axi_awvalid & up_axi_wvalid;
up_waddr <= up_axi_awaddr[AW+2:2];
up_wdata <= up_axi_wdata;
up_wcount <= 3'd0;
end
end
end
always @(negedge up_rstn or posedge up_clk) begin
if (up_rstn == 0) begin
up_wack_int <= 'd0;
up_wack_int_d <= 'd0;
end else begin
if ((up_wcount == 3'h7) && (up_wack == 1'b0)) begin
up_wack_int <= 1'b1;
end else if (up_wsel == 1'b1) begin
up_wack_int <= up_wack;
if (up_wack_s == 1'b1) begin
up_wcount <= 5'h00;
end else if (up_wcount[4] == 1'b1) begin
up_wcount <= up_wcount + 1'b1;
end else if (up_wreq == 1'b1) begin
up_wcount <= 5'h10;
end
up_wack_int_d <= up_wack_int;
end
end
@ -222,26 +218,33 @@ module up_axi (
end else begin
if (up_axi_arready == 1'b1) begin
up_axi_arready <= 1'b0;
end else if (up_rack_int == 1'b1) begin
end else if (up_rack_s == 1'b1) begin
up_axi_arready <= 1'b1;
end
if ((up_axi_rready == 1'b1) && (up_axi_rvalid == 1'b1)) begin
up_axi_rvalid <= 1'b0;
up_axi_rdata <= 32'd0;
end else if (up_rack_int_d == 1'b1) begin
end else if (up_rack_d == 1'b1) begin
up_axi_rvalid <= 1'b1;
up_axi_rdata <= up_rdata_int_d;
up_axi_rdata <= up_rdata_d;
end
end
end
assign up_rack_s = (up_rcount == 5'h1f) ? 1'b1 : (up_rcount[4] & up_rack);
assign up_rdata_s = (up_rcount == 5'h1f) ? {2{16'hdead}} : up_rdata;
always @(negedge up_rstn or posedge up_clk) begin
if (up_rstn == 1'b0) begin
up_rack_d <= 'd0;
up_rdata_d <= 'd0;
up_rsel <= 'd0;
up_rreq <= 'd0;
up_raddr <= 'd0;
up_rcount <= 'd0;
end else begin
up_rack_d <= up_rack_s;
up_rdata_d <= up_rdata_s;
if (up_rsel == 1'b1) begin
if ((up_axi_rready == 1'b1) && (up_axi_rvalid == 1'b1)) begin
up_rsel <= 1'b0;
@ -253,35 +256,16 @@ module up_axi (
up_rreq <= up_axi_arvalid;
up_raddr <= up_axi_araddr[AW+2:2];
end
if (up_rack_int == 1'b1) begin
up_rcount <= 5'd0;
if (up_rack_s == 1'b1) begin
up_rcount <= 5'h00;
end else if (up_rcount[4] == 1'b1) begin
up_rcount <= up_rcount + 1'b1;
end else if (up_rreq == 1'b1) begin
up_rcount <= 5'd16;
up_rcount <= 5'h10;
end
end
end
always @(negedge up_rstn or posedge up_clk) begin
if (up_rstn == 0) begin
up_rack_int <= 'd0;
up_rdata_int <= 'd0;
up_rack_int_d <= 'd0;
up_rdata_int_d <= 'd0;
end else begin
if ((up_rcount == 5'h1f) && (up_rack == 1'b0)) begin
up_rack_int <= 1'b1;
up_rdata_int <= {2{16'hdead}};
end else begin
up_rack_int <= up_rack;
up_rdata_int <= up_rdata;
end
up_rack_int_d <= up_rack_int;
up_rdata_int_d <= up_rdata_int;
end
end
endmodule
// ***************************************************************************