feat(top): integrate snix_axil_cdma_mux into top

rtl/soc_top.v

@@ -1475,43 +1475,6 @@ fft_controller u_fft_controller(
     .fft_finish 	(fft_finish  )
 );
 
-// assign dma_m_arid       = 4'b0  ;
-// assign dma_m_araddr     = 32'h0;
-// assign dma_m_arlen      = 8'b0  ;
-// assign dma_m_arsize     = 3'b0 ;
-// assign dma_m_arburst    = 2'b0;
-// assign dma_m_arlock     = 1'b0;
-// assign dma_m_arcache    = 4'b0;
-// assign dma_m_arprot     = 3'b0;
-// assign dma_m_arvalid    = 1'b0;
-// assign dma_m_rready     = 1'b1;
-// assign dma_m_awid       = 4'b0;
-// assign dma_m_awaddr     = 32'b0;
-// assign dma_m_awlen      = 8'b0;
-// assign dma_m_awsize     = 3'b0;
-// assign dma_m_awburst    = 2'b0;
-// assign dma_m_awlock     = 1'b0;
-// assign dma_m_awcache    = 4'b0;
-// assign dma_m_awprot     = 3'b0;
-// assign dma_m_awvalid    = 1'b0;
-// assign dma_m_wid        = 4'b0;
-// assign dma_m_wdata      = 32'b0;
-// assign dma_m_wstrb      = 4'b0;
-// assign dma_m_wlast      = 1'b0;
-// assign dma_m_wvalid     = 1'b0;
-// assign dma_m_bready     = 1'b1;
-// assign dma_s_arready    = 1'b1;
-// assign dma_s_rid        = 5'b0;
-// assign dma_s_rdata      = 32'b0;
-// assign dma_s_rresp      = 2'b0;
-// assign dma_s_rlast      = 1'b0;
-// assign dma_s_rvalid     = 1'b0;
-// assign dma_s_awready    = 1'b1;
-// assign dma_s_wready     = 1'b1;
-// assign dma_s_bid        = 5'b0;
-// assign dma_s_bresp      = 2'b0;
-// assign dma_s_bvalid     = 1'b0;
-
 wire [31:0] cdma_s_awaddr;
 wire [2:0]  cdma_s_awprot; 
 wire        cdma_s_awvalid;
@@ -1600,16 +1563,21 @@ u_axi_axil_adapter(
     .m_axil_rready(cdma_s_rready)
 );
 
-snix_axi_cdma #(
+// 8 通道 DMA
+snix_axil_cdma_mux #(
     .ADDR_WIDTH      (32),
-    .DATA_WIDTH      	(32  ),
+    .DATA_WIDTH      (32), // 适配你的 32-bit 总线
     .AXIL_ADDR_WIDTH (32),
     .AXIL_DATA_WIDTH (32),
-    .ID_WIDTH        	(4   ),
-    .USER_WIDTH      	(1   ))
-u_snix_axi_cdma(
+    .ID_WIDTH        (4),  // 匹配 Crossbar 的 Master ID 宽度
+    .USER_WIDTH      (1),
+    .PORTS           (8),
+    .FIFO_DEPTH      (64)   // 8 个独立通道
+) u_snix_axil_cdma_mux_8ch (
     .clk             (sys_clk),
-    .rst_n          	(sys_resetn          ),
+    .rst_n           (sys_resetn), // 低电平复位
+
+    // AXI-Lite 从机接口 (接 CPU 发来的配置请求)
     .s_axil_awaddr   (cdma_s_awaddr),
     .s_axil_awvalid  (cdma_s_awvalid),
     .s_axil_awready  (cdma_s_awready),
@@ -1628,6 +1596,7 @@ u_snix_axi_cdma(
     .s_axil_rvalid   (cdma_s_rvalid),
     .s_axil_rready   (cdma_s_rready),
 
+    // AXI4 主机接口 (接 Crossbar 去搬运数据)
     .mm2mm_awid      (dma_m_awid),
     .mm2mm_awaddr    (dma_m_awaddr),
     .mm2mm_awlen     (dma_m_awlen),
@@ -1636,14 +1605,14 @@ u_snix_axi_cdma(
     .mm2mm_awlock    (dma_m_awlock),
     .mm2mm_awcache   (dma_m_awcache),
     .mm2mm_awprot    (dma_m_awprot),
-    .mm2mm_awqos    	(     ),
-    .mm2mm_awuser   	(    ),
+    .mm2mm_awqos     (),             // 悬空即可
+    .mm2mm_awuser    (),             // 悬空即可
     .mm2mm_awvalid   (dma_m_awvalid),
     .mm2mm_awready   (dma_m_awready),
     .mm2mm_wdata     (dma_m_wdata),
     .mm2mm_wstrb     (dma_m_wstrb),
     .mm2mm_wlast     (dma_m_wlast),
-    .mm2mm_wuser    	(     ),
+    .mm2mm_wuser     (),             // 悬空即可
     .mm2mm_wvalid    (dma_m_wvalid),
     .mm2mm_wready    (dma_m_wready),
     .mm2mm_bid       (dma_m_bid),
@@ -1659,8 +1628,8 @@ u_snix_axi_cdma(
     .mm2mm_arlock    (dma_m_arlock),
     .mm2mm_arcache   (dma_m_arcache),
     .mm2mm_arprot    (dma_m_arprot),
-    .mm2mm_arqos    	(     ),
-    .mm2mm_aruser   	(    ),
+    .mm2mm_arqos     (),             // 悬空即可
+    .mm2mm_aruser    (),             // 悬空即可
     .mm2mm_arvalid   (dma_m_arvalid),
     .mm2mm_arready   (dma_m_arready),
     .mm2mm_rid       (dma_m_rid),
@@ -1671,6 +1640,7 @@ u_snix_axi_cdma(
     .mm2mm_rvalid    (dma_m_rvalid),
     .mm2mm_rready    (dma_m_rready),
 
+    // 全局中断输出
     .dma_finish      (dma_finish)
 );