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Rework DMA desc status demux to fix X issue at t=0

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This commit is contained in:
Alex Forencich 2021-09-09 00:58:48 -07:00
parent f566df2c66
commit b131b2ebbf
1 changed files with 7 additions and 14 deletions
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21
rtl/dma_if_desc_mux.v
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@ -280,29 +280,22 @@ always @(posedge clk) begin
end
// descriptor status demux
reg [S_TAG_WIDTH-1:0] m_axis_desc_status_tag_reg = {S_TAG_WIDTH{1'b0}}, m_axis_desc_status_tag_next;
reg [5:0] m_axis_desc_status_error_reg = 6'd0, m_axis_desc_status_error_next;
reg [PORTS-1:0] m_axis_desc_status_valid_reg = {PORTS{1'b0}}, m_axis_desc_status_valid_next;
reg [S_TAG_WIDTH-1:0] m_axis_desc_status_tag_reg = {S_TAG_WIDTH{1'b0}};
reg [3:0] m_axis_desc_status_error_reg = 4'd0;
reg [PORTS-1:0] m_axis_desc_status_valid_reg = {PORTS{1'b0}};
assign m_axis_desc_status_tag = {PORTS{m_axis_desc_status_tag_reg}};
assign m_axis_desc_status_error = {PORTS{m_axis_desc_status_error_reg}};
assign m_axis_desc_status_valid = m_axis_desc_status_valid_reg;
always @* begin
m_axis_desc_status_tag_next = s_axis_desc_status_tag;
m_axis_desc_status_error_next = s_axis_desc_status_error;
m_axis_desc_status_valid_next = s_axis_desc_status_valid << (PORTS > 1 ? s_axis_desc_status_tag[S_TAG_WIDTH+CL_PORTS-1:S_TAG_WIDTH] : 0);
end
always @(posedge clk) begin
m_axis_desc_status_tag_reg <= s_axis_desc_status_tag;
m_axis_desc_status_error_reg <= s_axis_desc_status_error;
m_axis_desc_status_valid_reg <= s_axis_desc_status_valid << (PORTS > 1 ? s_axis_desc_status_tag[S_TAG_WIDTH+CL_PORTS-1:S_TAG_WIDTH] : 0);
if (rst) begin
m_axis_desc_status_valid_reg <= {PORTS{1'b0}};
end else begin
m_axis_desc_status_valid_reg <= m_axis_desc_status_valid_next;
end
m_axis_desc_status_tag_reg <= m_axis_desc_status_tag_next;
m_axis_desc_status_error_reg <= m_axis_desc_status_error_next;
end
endmodule