From 95c35cdd306868599e6ee11cbfbe4495a0ab843f Mon Sep 17 00:00:00 2001
From: Alejandro Soto <alejandro@34project.org>
Date: Mon, 6 May 2024 01:56:14 -0600
Subject: rtl/gfx: add axilemu interface

---
 platform/wavelet3d/w3d_top.sv |  4 +++-
 rtl/gfx/gfx_top.sv            | 30 ++++++++++++++++++++++++++----
 rtl/gfx/mod.mk                |  4 ++--
 3 files changed, 31 insertions(+), 7 deletions(-)

diff --git a/platform/wavelet3d/w3d_top.sv b/platform/wavelet3d/w3d_top.sv
index ec19fd2..a30745c 100644
--- a/platform/wavelet3d/w3d_top.sv
+++ b/platform/wavelet3d/w3d_top.sv
@@ -42,6 +42,7 @@ import gfx::*;
 );
 
 	gfx_wb fpint_wb();
+	if_axil host_ctrl();
 	if_pkts coverage(), geometry();
 	gfx_regfile_io fpint_io();
 
@@ -106,7 +107,8 @@ import gfx::*;
 	gfx_top gfx
 	(
 		.clk,
-		.rst_n
+		.rst_n,
+		.host_ctrl(host_ctrl.s)
 	);
 
 endmodule
diff --git a/rtl/gfx/gfx_top.sv b/rtl/gfx/gfx_top.sv
index 853468d..215c953 100644
--- a/rtl/gfx/gfx_top.sv
+++ b/rtl/gfx/gfx_top.sv
@@ -1,14 +1,19 @@
 module gfx_top
 import gfx::*;
 (
-	input  logic clk,
-	             rst_n
+	input  logic     clk,
+	                 rst_n,
+	
+	       if_axil.s host_ctrl
 );
 
 	logic srst_n;
 
 	if_axib insn_mem();
-	if_axil bootrom_axi(), debug_axi(), sched_axi(), shader_0_axi();
+	if_axil bootrom_axi(), debug_axi(), host_ctrl_axi(), sched_axi(), shader_0_axi();
+
+	logic irq_host_ctrl;
+	irq_lines irq;
 
 	gfx_rst_sync rst_sync
 	(
@@ -22,10 +27,19 @@ import gfx::*;
 		.clk,
 		.rst_n,
 		.srst_n,
-		.irq(0),
+		.irq,
 		.axim(sched_axi.m)
 	);
 
+	axilemu host_ctrl_bridge
+	(
+		.clk,
+		.rst_n,
+		.irq(irq_host_ctrl),
+		.agent(host_ctrl),
+		.driver(host_ctrl_axi.s)
+	);
+
 	gfx_bootrom bootrom
 	(
 		.clk,
@@ -70,4 +84,12 @@ import gfx::*;
 	);
 	*/
 
+	always_ff @(posedge clk or negedge rst_n)
+		if (~rst_n)
+			irq <= '0;
+		else begin
+			irq <= '0;
+			irq[0] <= irq_host_ctrl;
+		end
+
 endmodule
diff --git a/rtl/gfx/mod.mk b/rtl/gfx/mod.mk
index 3c27a4a..6ea0fb1 100644
--- a/rtl/gfx/mod.mk
+++ b/rtl/gfx/mod.mk
@@ -1,11 +1,11 @@
 cores := gfx_shader_schedif
 
 define core
-  $(this)/deps := axixbar gfx_shader_schedif if_common picorv32
+  $(this)/deps := axilemu axixbar gfx_shader_schedif if_common picorv32
 
   $(this)/rtl_top := gfx_top
   $(this)/rtl_dirs := .
-  $(this)/rtl_files := gfx_isa.sv gfx_pkg.sv
+  $(this)/rtl_files := gfx_isa.sv gfx_pkg.sv gfx_top.sv
 endef
 
 define core/gfx_shader_schedif
-- 
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