Add Alinx AX309 board as a target

Running at 32MHz with 115200 baud rate UART (using the on-board RS232)

servant/servant_ax309.v

@@ -0,0 +1,32 @@
+`default_nettype none
+module servant_ax309
+(
+ input wire  i_clk,
+ input wire  i_rst,
+ output wire o_uart_tx,
+ output wire q);
+
+   parameter memfile = "zephyr_hello.hex";
+   parameter memsize = 8192;
+
+   wire      wb_clk;
+   wire      wb_rst;
+
+   assign o_uart_tx = q;
+
+   servant_ax309_clock_gen
+   clock_gen
+     (.i_clk (i_clk),
+      .i_rst (i_rst),
+      .o_clk (wb_clk),
+      .o_rst (wb_rst));
+
+   servant
+     #(.memfile (memfile),
+       .memsize (memsize))
+   servant
+     (.wb_clk (wb_clk),
+      .wb_rst (wb_rst),
+      .q      (q));
+
+endmodule

servant/servant_ax309_clock_gen.v

@@ -0,0 +1,35 @@
+`default_nettype none
+module servant_ax309_clock_gen
+  (input wire  i_clk,
+   input wire  i_rst,
+   output wire o_clk,
+   output reg  o_rst);
+
+   wire   clkfb;
+   wire   locked;
+   reg 	  locked_r;
+
+   PLL_BASE
+     #(.BANDWIDTH("OPTIMIZED"),
+       .CLKFBOUT_MULT(16),
+       .CLKIN_PERIOD(20.0), //50MHz
+       .CLKOUT1_DIVIDE(25), //32MHz
+       .DIVCLK_DIVIDE(1))
+   PLL_BASE_inst
+     (.CLKOUT1(o_clk),
+      .CLKOUT2(),
+      .CLKOUT3(),
+      .CLKOUT4(),
+      .CLKOUT5(),
+      .CLKFBOUT(clkfb),
+      .LOCKED(locked),
+      .CLKIN(i_clk),
+      .RST(~i_rst),
+      .CLKFBIN(clkfb));
+
+   always @(posedge o_clk) begin
+      locked_r <= locked;
+      o_rst  <= !locked_r;
+   end
+
+endmodule