module dma_if_mux_rd #
(
    // Number of ports
    parameter PORTS = 2,
    // RAM segment count
    parameter SEG_COUNT = 2,
    // RAM segment data width
    parameter SEG_DATA_WIDTH = 64,
    // RAM segment address width
    parameter SEG_ADDR_WIDTH = 8,
    // RAM segment byte enable width
    parameter SEG_BE_WIDTH = SEG_DATA_WIDTH/8,
    // Input RAM segment select width
    parameter S_RAM_SEL_WIDTH = 2,
    // Output RAM segment select width
    // Additional bits required for response routing
    parameter M_RAM_SEL_WIDTH = S_RAM_SEL_WIDTH+$clog2(PORTS),
    // RAM address width
    parameter RAM_ADDR_WIDTH = SEG_ADDR_WIDTH+$clog2(SEG_COUNT)+$clog2(SEG_BE_WIDTH),
    // DMA address width
    parameter DMA_ADDR_WIDTH = 64,
    // Length field width
    parameter LEN_WIDTH = 16,
    // Input tag field width
    parameter S_TAG_WIDTH = 8,
    // Output tag field width (towards DMA module)
    // Additional bits required for response routing
    parameter M_TAG_WIDTH = S_TAG_WIDTH+$clog2(PORTS),
    // select round robin arbitration
    parameter ARB_TYPE_ROUND_ROBIN = 0,
    // LSB priority selection
    parameter ARB_LSB_HIGH_PRIORITY = 1
)
(
    input  wire                                       clk,
    input  wire                                       rst,

    /*
     * Read descriptor output (to DMA interface)
     */
    output wire [DMA_ADDR_WIDTH-1:0]                  m_axis_read_desc_dma_addr,
    output wire [M_RAM_SEL_WIDTH-1:0]                 m_axis_read_desc_ram_sel,
    output wire [RAM_ADDR_WIDTH-1:0]                  m_axis_read_desc_ram_addr,
    output wire [LEN_WIDTH-1:0]                       m_axis_read_desc_len,
    output wire [M_TAG_WIDTH-1:0]                     m_axis_read_desc_tag,
    output wire                                       m_axis_read_desc_valid,
    input  wire                                       m_axis_read_desc_ready,

    /*
     * Read descriptor status input (from DMA interface)
     */
    input  wire [M_TAG_WIDTH-1:0]                     s_axis_read_desc_status_tag,
    input  wire [3:0]                                 s_axis_read_desc_status_error,
    input  wire                                       s_axis_read_desc_status_valid,

    /*
     * Read descriptor input
     */
    input  wire [PORTS*DMA_ADDR_WIDTH-1:0]            s_axis_read_desc_dma_addr,
    input  wire [PORTS*S_RAM_SEL_WIDTH-1:0]           s_axis_read_desc_ram_sel,
    input  wire [PORTS*RAM_ADDR_WIDTH-1:0]            s_axis_read_desc_ram_addr,
    input  wire [PORTS*LEN_WIDTH-1:0]                 s_axis_read_desc_len,
    input  wire [PORTS*S_TAG_WIDTH-1:0]               s_axis_read_desc_tag,
    input  wire [PORTS-1:0]                           s_axis_read_desc_valid,
    output wire [PORTS-1:0]                           s_axis_read_desc_ready,

    /*
     * Read descriptor status output
     */
    output wire [PORTS*S_TAG_WIDTH-1:0]               m_axis_read_desc_status_tag,
    output wire [PORTS*4-1:0]                         m_axis_read_desc_status_error,
    output wire [PORTS-1:0]                           m_axis_read_desc_status_valid,

    /*
     * RAM interface (from DMA interface)
     */
    input  wire [SEG_COUNT*M_RAM_SEL_WIDTH-1:0]       if_ram_wr_cmd_sel,
    input  wire [SEG_COUNT*SEG_BE_WIDTH-1:0]          if_ram_wr_cmd_be,
    input  wire [SEG_COUNT*SEG_ADDR_WIDTH-1:0]        if_ram_wr_cmd_addr,
    input  wire [SEG_COUNT*SEG_DATA_WIDTH-1:0]        if_ram_wr_cmd_data,
    input  wire [SEG_COUNT-1:0]                       if_ram_wr_cmd_valid,
    output wire [SEG_COUNT-1:0]                       if_ram_wr_cmd_ready,
    output wire [SEG_COUNT-1:0]                       if_ram_wr_done,

    /*
     * RAM interface (towards RAM)
     */
    output wire [PORTS*SEG_COUNT*S_RAM_SEL_WIDTH-1:0] ram_wr_cmd_sel,
    output wire [PORTS*SEG_COUNT*SEG_BE_WIDTH-1:0]    ram_wr_cmd_be,
    output wire [PORTS*SEG_COUNT*SEG_ADDR_WIDTH-1:0]  ram_wr_cmd_addr,
    output wire [PORTS*SEG_COUNT*SEG_DATA_WIDTH-1:0]  ram_wr_cmd_data,
    output wire [PORTS*SEG_COUNT-1:0]                 ram_wr_cmd_valid,
    input  wire [PORTS*SEG_COUNT-1:0]                 ram_wr_cmd_ready,
    input  wire [PORTS*SEG_COUNT-1:0]                 ram_wr_done
);

dma_if_desc_mux #(
    .PORTS(PORTS),
    .EXTEND_RAM_SEL(1),
    .S_RAM_SEL_WIDTH(S_RAM_SEL_WIDTH),
    .M_RAM_SEL_WIDTH(M_RAM_SEL_WIDTH),
    .RAM_ADDR_WIDTH(RAM_ADDR_WIDTH),
    .DMA_ADDR_WIDTH(DMA_ADDR_WIDTH),
    .IMM_ENABLE(0),
    .LEN_WIDTH(LEN_WIDTH),
    .S_TAG_WIDTH(S_TAG_WIDTH),
    .M_TAG_WIDTH(M_TAG_WIDTH),
    .ARB_TYPE_ROUND_ROBIN(ARB_TYPE_ROUND_ROBIN),
    .ARB_LSB_HIGH_PRIORITY(ARB_LSB_HIGH_PRIORITY)
)
dma_if_desc_mux_inst (
    .clk(clk),
    .rst(rst),

    /*
     * Read descriptor output (to DMA interface)
     */
    .m_axis_desc_dma_addr(m_axis_read_desc_dma_addr),
    .m_axis_desc_ram_sel(m_axis_read_desc_ram_sel),
    .m_axis_desc_ram_addr(m_axis_read_desc_ram_addr),
    .m_axis_desc_imm(),
    .m_axis_desc_imm_en(),
    .m_axis_desc_len(m_axis_read_desc_len),
    .m_axis_desc_tag(m_axis_read_desc_tag),
    .m_axis_desc_valid(m_axis_read_desc_valid),
    .m_axis_desc_ready(m_axis_read_desc_ready),

    /*
     * Read descriptor status input (from DMA interface)
     */
    .s_axis_desc_status_tag(s_axis_read_desc_status_tag),
    .s_axis_desc_status_error(s_axis_read_desc_status_error),
    .s_axis_desc_status_valid(s_axis_read_desc_status_valid),

    /*
     * Read descriptor input
     */
    .s_axis_desc_dma_addr(s_axis_read_desc_dma_addr),
    .s_axis_desc_ram_sel(s_axis_read_desc_ram_sel),
    .s_axis_desc_ram_addr(s_axis_read_desc_ram_addr),
    .s_axis_desc_imm({PORTS{32'd0}}),
    .s_axis_desc_imm_en({PORTS{1'b0}}),
    .s_axis_desc_len(s_axis_read_desc_len),
    .s_axis_desc_tag(s_axis_read_desc_tag),
    .s_axis_desc_valid(s_axis_read_desc_valid),
    .s_axis_desc_ready(s_axis_read_desc_ready),

    /*
     * Read descriptor status output
     */
    .m_axis_desc_status_tag(m_axis_read_desc_status_tag),
    .m_axis_desc_status_error(m_axis_read_desc_status_error),
    .m_axis_desc_status_valid(m_axis_read_desc_status_valid)
);

dma_ram_demux_wr #(
    .PORTS(PORTS),
    .SEG_COUNT(SEG_COUNT),
    .SEG_DATA_WIDTH(SEG_DATA_WIDTH),
    .SEG_ADDR_WIDTH(SEG_ADDR_WIDTH),
    .SEG_BE_WIDTH(SEG_BE_WIDTH),
    .S_RAM_SEL_WIDTH(S_RAM_SEL_WIDTH),
    .M_RAM_SEL_WIDTH(M_RAM_SEL_WIDTH)
)
dma_ram_demux_inst (
    .clk(clk),
    .rst(rst),

    /*
     * RAM interface (from DMA client/interface)
     */
    .ctrl_wr_cmd_sel(if_ram_wr_cmd_sel),
    .ctrl_wr_cmd_be(if_ram_wr_cmd_be),
    .ctrl_wr_cmd_addr(if_ram_wr_cmd_addr),
    .ctrl_wr_cmd_data(if_ram_wr_cmd_data),
    .ctrl_wr_cmd_valid(if_ram_wr_cmd_valid),
    .ctrl_wr_cmd_ready(if_ram_wr_cmd_ready),
    .ctrl_wr_done(if_ram_wr_done),

    /*
     * RAM interface (towards RAM)
     */
    .ram_wr_cmd_sel(ram_wr_cmd_sel),
    .ram_wr_cmd_be(ram_wr_cmd_be),
    .ram_wr_cmd_addr(ram_wr_cmd_addr),
    .ram_wr_cmd_data(ram_wr_cmd_data),
    .ram_wr_cmd_valid(ram_wr_cmd_valid),
    .ram_wr_cmd_ready(ram_wr_cmd_ready),
    .ram_wr_done(ram_wr_done)
);

endmodule