diff --git a/src/superio/ite/it8718f/it8718f.h b/src/superio/ite/it8718f/it8718f.h
index 2d2171fb0b..1967d25b5f 100644
--- a/src/superio/ite/it8718f/it8718f.h
+++ b/src/superio/ite/it8718f/it8718f.h
@@ -30,3 +30,8 @@
 #define IT8718F_KBCM 0x06 /* Mouse */
 #define IT8718F_IR   0x0a /* Consumer IR */
 
+#if defined(__PRE_RAM__) && !defined(__ROMCC__)
+void it8718f_24mhz_clkin(void);
+void it8718f_enable_serial(device_t dev, unsigned iobase);
+#endif
+
diff --git a/src/superio/ite/it8718f/it8718f_early_serial.c b/src/superio/ite/it8718f/it8718f_early_serial.c
index 6aae54d65e..fabbde5e8f 100644
--- a/src/superio/ite/it8718f/it8718f_early_serial.c
+++ b/src/superio/ite/it8718f/it8718f_early_serial.c
@@ -64,7 +64,7 @@ static void it8718f_exit_conf(void)
 	it8718f_sio_write(0x00, IT8718F_CONFIG_REG_CC, 0x02);
 }
 
-static void it8718f_24mhz_clkin(void)
+void it8718f_24mhz_clkin(void)
 {
 	it8718f_enter_conf();
 
@@ -75,7 +75,7 @@ static void it8718f_24mhz_clkin(void)
 }
 
 /* Enable the peripheral devices on the IT8718F Super I/O chip. */
-static void it8718f_enable_serial(device_t dev, unsigned iobase)
+void it8718f_enable_serial(device_t dev, unsigned iobase)
 {
 	/* (1) Enter the configuration state (MB PnP mode). */
 	it8718f_enter_conf();
diff --git a/src/superio/nsc/pc87417/pc87417.h b/src/superio/nsc/pc87417/pc87417.h
index 3171d1fd7d..bc65eef554 100644
--- a/src/superio/nsc/pc87417/pc87417.h
+++ b/src/superio/nsc/pc87417/pc87417.h
@@ -110,3 +110,9 @@
 #define PC87417_HAP1		0x14
 #define PC87417_XSCNF		0x15
 #define PC87417_XWBCNF		0x16
+
+#if defined(__PRE_RAM__) && !defined(__ROMCC__)
+void pc87417_enable_serial(device_t dev, unsigned iobase);
+void pc87417_enable_dev(device_t dev);
+#endif
+
diff --git a/src/superio/nsc/pc87417/pc87417_early_serial.c b/src/superio/nsc/pc87417/pc87417_early_serial.c
index 78cf9b48bf..8d748046c6 100644
--- a/src/superio/nsc/pc87417/pc87417_early_serial.c
+++ b/src/superio/nsc/pc87417/pc87417_early_serial.c
@@ -23,7 +23,7 @@
 #include <arch/romcc_io.h>
 #include "pc87417.h"
 
-static void pc87417_enable_serial(device_t dev, unsigned iobase)
+void pc87417_enable_serial(device_t dev, unsigned iobase)
 {
 	pnp_set_logical_device(dev);
 	pnp_set_enable(dev, 0);
@@ -31,7 +31,7 @@ static void pc87417_enable_serial(device_t dev, unsigned iobase)
 	pnp_set_enable(dev, 1);
 }
 
-static void pc87417_enable_dev(device_t dev)
+void pc87417_enable_dev(device_t dev)
 {
 	pnp_set_logical_device(dev);
 	pnp_set_enable(dev, 1);
diff --git a/src/superio/winbond/w83627ehg/w83627ehg.h b/src/superio/winbond/w83627ehg/w83627ehg.h
index aeda043fcb..9e32f64c23 100644
--- a/src/superio/winbond/w83627ehg/w83627ehg.h
+++ b/src/superio/winbond/w83627ehg/w83627ehg.h
@@ -44,3 +44,9 @@
 #define W83627EHG_GPIO3		((1 << 8) | 9)
 #define W83627EHG_GPIO4		((2 << 8) | 9)
 #define W83627EHG_GPIO5		((3 << 8) | 9)
+
+#if defined(__PRE_RAM__) && !defined(__ROMCC__)
+void w83627ehg_enable_dev(device_t dev, unsigned iobase);
+void w83627ehg_disable_dev(device_t dev);
+void w83627ehg_enable_serial(device_t dev, unsigned iobase);
+#endif
diff --git a/src/superio/winbond/w83627ehg/w83627ehg_early_init.c b/src/superio/winbond/w83627ehg/w83627ehg_early_init.c
index 125837a556..0335a67be5 100644
--- a/src/superio/winbond/w83627ehg/w83627ehg_early_init.c
+++ b/src/superio/winbond/w83627ehg/w83627ehg_early_init.c
@@ -22,13 +22,13 @@
 #include <arch/romcc_io.h>
 #include "w83627ehg.h"
 
-static void w83627ehg_disable_dev(device_t dev)
+void w83627ehg_disable_dev(device_t dev)
 {
 	pnp_set_logical_device(dev);
 	pnp_set_enable(dev, 0);
 }
 
-static void w83627ehg_enable_dev(device_t dev, unsigned iobase)
+void w83627ehg_enable_dev(device_t dev, unsigned iobase)
 {
 	pnp_set_logical_device(dev);
 	pnp_set_enable(dev, 0);
diff --git a/src/superio/winbond/w83627ehg/w83627ehg_early_serial.c b/src/superio/winbond/w83627ehg/w83627ehg_early_serial.c
index 170b6a7ded..63b044a9e5 100644
--- a/src/superio/winbond/w83627ehg/w83627ehg_early_serial.c
+++ b/src/superio/winbond/w83627ehg/w83627ehg_early_serial.c
@@ -35,7 +35,7 @@ static void pnp_exit_ext_func_mode(device_t dev)
 	outb(0xaa, port);
 }
 
-static void w83627ehg_enable_serial(device_t dev, unsigned iobase)
+void w83627ehg_enable_serial(device_t dev, unsigned iobase)
 {
 	pnp_enter_ext_func_mode(dev);
 	pnp_set_logical_device(dev);
diff --git a/src/superio/winbond/w83627hf/w83627hf.h b/src/superio/winbond/w83627hf/w83627hf.h
index fa74cbd6df..a21a2b0bfd 100644
--- a/src/superio/winbond/w83627hf/w83627hf.h
+++ b/src/superio/winbond/w83627hf/w83627hf.h
@@ -113,5 +113,7 @@
 #if defined(__PRE_RAM__) && !defined(__ROMCC__)
 void w83627hf_disable_dev(device_t dev);
 void w83627hf_enable_dev(device_t dev, unsigned iobase);
+void w83627hf_enable_serial(device_t dev, unsigned iobase);
+void w83627hf_set_clksel_48(device_t dev);
 #endif
 
diff --git a/src/superio/winbond/w83627hf/w83627hf_early_serial.c b/src/superio/winbond/w83627hf/w83627hf_early_serial.c
index 19734934c0..2bc6c1dddf 100644
--- a/src/superio/winbond/w83627hf/w83627hf_early_serial.c
+++ b/src/superio/winbond/w83627hf/w83627hf_early_serial.c
@@ -37,7 +37,7 @@ static void pnp_exit_ext_func_mode(device_t dev)
 	outb(0xaa, port);
 }
 
-static void w83627hf_enable_serial(device_t dev, unsigned iobase)
+void w83627hf_enable_serial(device_t dev, unsigned iobase)
 {
 	pnp_enter_ext_func_mode(dev);
 	pnp_set_logical_device(dev);
@@ -47,7 +47,7 @@ static void w83627hf_enable_serial(device_t dev, unsigned iobase)
 	pnp_exit_ext_func_mode(dev);
 }
 
-static inline void w83627hf_set_clksel_48(device_t dev)
+void w83627hf_set_clksel_48(device_t dev)
 {
 	unsigned port = dev >> 8;
 	pnp_enter_ext_func_mode(dev);