Implement interrupt controller

1 files changed, 30 insertions, 0 deletions

diff --git a/rtl/intc.sv b/rtl/intc.sv
new file mode 100644
index 0000000..af78ef8
--- /dev/null
+++ b/rtl/intc.sv
@@ -0,0 +1,30 @@
+module intc
+(
+	input  logic       clk,
+	                   rst_n,
+
+	input  logic       irq_timer,
+	                   irq_jtaguart,
+
+	input logic        avl_address,
+	                   avl_read,
+	                   avl_write,
+	input  logic[31:0] avl_writedata,
+
+	output logic       avl_irq,
+	output logic[31:0] avl_readdata
+);
+
+	logic[31:0] status, mask;
+
+	assign status = {30'b0, irq_jtaguart, irq_timer} & mask;
+	assign avl_irq = |status;
+	assign avl_readdata = avl_address ? mask : status;
+
+	always @(posedge clk or negedge rst_n)
+		if(!rst_n)
+			mask <= 0;
+		else if(avl_write && avl_address)
+			mask <= avl_writedata;
+
+endmodule