diff --git a/hw/deps/litedram b/hw/deps/litedram
index a35a1f7..1f7d9eb 160000
--- a/hw/deps/litedram
+++ b/hw/deps/litedram
@@ -1 +1 @@
-Subproject commit a35a1f7790cba537d52ccc8ae73c4e230a6cba8d
+Subproject commit 1f7d9eb0b99162c0a671aaebf17d963eb49f6cbc
diff --git a/hw/deps/litex b/hw/deps/litex
index 43d328b..3391398 160000
--- a/hw/deps/litex
+++ b/hw/deps/litex
@@ -1 +1 @@
-Subproject commit 43d328b9249e3c583d41bcbc15119a5f563b0c7b
+Subproject commit 3391398a5fccd5fc6cae36231a11d34f032dc3c5
diff --git a/hw/deps/litex-boards b/hw/deps/litex-boards
index 2213d73..482d7a6 160000
--- a/hw/deps/litex-boards
+++ b/hw/deps/litex-boards
@@ -1 +1 @@
-Subproject commit 2213d73b899e64707c71c87b2d79eef892018bdd
+Subproject commit 482d7a6b95982bb78eec051858b7d66568af3c7b
diff --git a/hw/deps/migen b/hw/deps/migen
index 5b5e4fd..b1b2b29 160000
--- a/hw/deps/migen
+++ b/hw/deps/migen
@@ -1 +1 @@
-Subproject commit 5b5e4fdee19c4059b61371c6b70ae927980c24ad
+Subproject commit b1b2b298b85a795239daad84c75be073ddc4f8bd
diff --git a/hw/deps/pythondata-software-compiler_rt b/hw/deps/pythondata-software-compiler_rt
index 335007c..020625a 160000
--- a/hw/deps/pythondata-software-compiler_rt
+++ b/hw/deps/pythondata-software-compiler_rt
@@ -1 +1 @@
-Subproject commit 335007c87f7fc900147b7323c9702698caa35d11
+Subproject commit 020625a0d0359ccb6b0fdab3942aaa159a4a5b86
diff --git a/sw/include/system.h b/sw/include/system.h
index ea3da85..89e5610 100644
--- a/sw/include/system.h
+++ b/sw/include/system.h
@@ -60,6 +60,10 @@ static inline void mtspr(unsigned long add, unsigned long val)
 
 __attribute__((noreturn)) void reboot(void);
 
+// Forward-define this function, because it's defined inside `csr.h`,
+// which includes this file near the top.
+static inline void reboot_ctrl_write(uint32_t v);
+
 __attribute__((noreturn)) static inline void warmboot_to_image(uint8_t image_index) {
 	reboot_ctrl_write(0xac | (image_index & 3) << 0);
 	while (1);