diff --git a/.gitmodules b/.gitmodules
index 55350ea..f5b3273 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,7 @@
+[submodule "fw/cpu/picorv32"]
+	path = fw/cpu/picorv32
+	url = https://github.com/cliffordwolf/picorv32.git
+	ignore = dirty
 [submodule "sw/cic"]
 	path = sw/cic
 	url = https://github.com/ManCloud/UltraCIC-III.git
diff --git a/fw/cpu/picorv32 b/fw/cpu/picorv32
new file mode 160000
index 0000000..f9b1beb
--- /dev/null
+++ b/fw/cpu/picorv32
@@ -0,0 +1 @@
+Subproject commit f9b1beb4cfd6b382157b54bc8f38c61d5ae7d785