diff --git a/src/mainboard/advansus/a785e-i/mainboard.c b/src/mainboard/advansus/a785e-i/mainboard.c
index b5a2ea82db..1381dfa352 100644
--- a/src/mainboard/advansus/a785e-i/mainboard.c
+++ b/src/mainboard/advansus/a785e-i/mainboard.c
@@ -23,9 +23,6 @@
 #include <device/pci_def.h>
 #include "southbridge/amd/rs780/rs780.h"
 
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
-
 /* GPIO6. */
 static void enable_int_gfx(void)
 {
@@ -45,14 +42,6 @@ static void enable_int_gfx(void)
 	*(gpio_reg + 170) = 0x0;
 }
 
-void set_pcie_dereset()
-{
-}
-
-void set_pcie_reset(void)
-{
-}
-
 int is_dev3_present(void)
 {
 	return 0;
diff --git a/src/mainboard/amd/bimini_fam10/mainboard.c b/src/mainboard/amd/bimini_fam10/mainboard.c
index b6347ebc37..3fa2405739 100644
--- a/src/mainboard/amd/bimini_fam10/mainboard.c
+++ b/src/mainboard/amd/bimini_fam10/mainboard.c
@@ -24,9 +24,6 @@
 #include <southbridge/amd/sb800/sb800.h>
 #include "southbridge/amd/rs780/rs780.h"
 
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
-
 /* GPIO6. */
 static void enable_int_gfx(void)
 {
@@ -58,16 +55,9 @@ static void enable_int_gfx(void)
 /*
  * Bimini uses GPIO 6 as PCIe slot reset, GPIO4 as GFX slot reset. We need to
  * pull it up before training the slot.
+ *
+ * Old comment says: GPIO 50h to reset PCIe slot.
  ***/
-void set_pcie_dereset(void)
-{
-	/* GPIO 50h reset PCIe slot */
-}
-
-void set_pcie_reset(void)
-{
-	/* GPIO 50h reset PCIe slot */
-}
 
 int is_dev3_present(void)
 {
diff --git a/src/mainboard/amd/mahogany_fam10/mainboard.c b/src/mainboard/amd/mahogany_fam10/mainboard.c
index 53a8290685..a4a26e026c 100644
--- a/src/mainboard/amd/mahogany_fam10/mainboard.c
+++ b/src/mainboard/amd/mahogany_fam10/mainboard.c
@@ -24,13 +24,11 @@
 #include "southbridge/amd/sb700/smbus.h"
 #include "southbridge/amd/rs780/rs780.h"
 
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
 /*
  * Mahogany uses GPIO 6 as PCIe slot reset, GPIO4 as GFX slot reset. We need to
  * pull it up before training the slot.
  ***/
-void set_pcie_dereset()
+void set_pcie_dereset(void)
 {
 	u16 word;
 	struct device *sm_dev;
@@ -43,7 +41,7 @@ void set_pcie_dereset()
 	pci_write_config16(sm_dev, 0xA8, word);
 }
 
-void set_pcie_reset()
+void set_pcie_reset(void)
 {
 	u16 word;
 	struct device *sm_dev;
diff --git a/src/mainboard/amd/tilapia_fam10/mainboard.c b/src/mainboard/amd/tilapia_fam10/mainboard.c
index e8a08a53c1..44c1df69ba 100644
--- a/src/mainboard/amd/tilapia_fam10/mainboard.c
+++ b/src/mainboard/amd/tilapia_fam10/mainboard.c
@@ -34,10 +34,7 @@
 #define ADT7461_write_byte(address, val) \
 	do_smbus_write_byte(SMBUS_IO_BASE, ADT7461_ADDRESS, address, val)
 
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
-
-void set_pcie_dereset()
+void set_pcie_dereset(void)
 {
 	u8 byte;
 	u16 word;
@@ -62,7 +59,7 @@ void set_pcie_dereset()
 	pci_write_config16(sm_dev, 0x7e, word);
 }
 
-void set_pcie_reset()
+void set_pcie_reset(void)
 {
 	u8 byte;
 	u16 word;
diff --git a/src/mainboard/asus/m4a78-em/mainboard.c b/src/mainboard/asus/m4a78-em/mainboard.c
index e80d39b0e8..87acc5674c 100644
--- a/src/mainboard/asus/m4a78-em/mainboard.c
+++ b/src/mainboard/asus/m4a78-em/mainboard.c
@@ -24,11 +24,7 @@
 #include "southbridge/amd/sb700/smbus.h"
 #include "southbridge/amd/rs780/rs780.h"
 
-
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
-
-void set_pcie_dereset()
+void set_pcie_dereset(void)
 {
 	u8 byte;
 	u16 word;
@@ -53,7 +49,7 @@ void set_pcie_dereset()
 	pci_write_config16(sm_dev, 0x7e, word);
 }
 
-void set_pcie_reset()
+void set_pcie_reset(void)
 {
 	u8 byte;
 	u16 word;
diff --git a/src/mainboard/asus/m4a785-m/mainboard.c b/src/mainboard/asus/m4a785-m/mainboard.c
index 42a9f644e3..5acce51969 100644
--- a/src/mainboard/asus/m4a785-m/mainboard.c
+++ b/src/mainboard/asus/m4a785-m/mainboard.c
@@ -34,10 +34,7 @@
 #define ADT7461_write_byte(address, val) \
 	do_smbus_write_byte(SMBUS_IO_BASE, ADT7461_ADDRESS, address, val)
 
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
-
-void set_pcie_dereset()
+void set_pcie_dereset(void)
 {
 	u8 byte;
 	u16 word;
@@ -62,7 +59,7 @@ void set_pcie_dereset()
 	pci_write_config16(sm_dev, 0x7e, word);
 }
 
-void set_pcie_reset()
+void set_pcie_reset(void)
 {
 	u8 byte;
 	u16 word;
diff --git a/src/mainboard/asus/m5a88-v/mainboard.c b/src/mainboard/asus/m5a88-v/mainboard.c
index 4ec716e96a..75f231e74b 100644
--- a/src/mainboard/asus/m5a88-v/mainboard.c
+++ b/src/mainboard/asus/m5a88-v/mainboard.c
@@ -23,9 +23,6 @@
 #include <device/pci_def.h>
 #include "southbridge/amd/rs780/rs780.h"
 
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
-
 /* GPIO6. */
 static void enable_int_gfx(void)
 {
@@ -45,14 +42,6 @@ static void enable_int_gfx(void)
 	*(gpio_reg + 170) = 0x0;
 }
 
-void set_pcie_dereset()
-{
-}
-
-void set_pcie_reset(void)
-{
-}
-
 int is_dev3_present(void)
 {
 	return 0;
diff --git a/src/mainboard/avalue/eax-785e/mainboard.c b/src/mainboard/avalue/eax-785e/mainboard.c
index 4d2f0ff42d..79564a288f 100644
--- a/src/mainboard/avalue/eax-785e/mainboard.c
+++ b/src/mainboard/avalue/eax-785e/mainboard.c
@@ -23,9 +23,6 @@
 #include <device/pci_def.h>
 #include "southbridge/amd/rs780/rs780.h"
 
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
-
 /* GPIO6. */
 static void enable_int_gfx(void)
 {
@@ -45,14 +42,6 @@ static void enable_int_gfx(void)
 	*(gpio_reg + 170) = 0x0;
 }
 
-void set_pcie_dereset()
-{
-}
-
-void set_pcie_reset(void)
-{
-}
-
 int is_dev3_present(void)
 {
 	return 1;
diff --git a/src/mainboard/gigabyte/ma785gm/mainboard.c b/src/mainboard/gigabyte/ma785gm/mainboard.c
index 37a3828f94..8fbc591c86 100644
--- a/src/mainboard/gigabyte/ma785gm/mainboard.c
+++ b/src/mainboard/gigabyte/ma785gm/mainboard.c
@@ -24,10 +24,7 @@
 #include "southbridge/amd/sb700/smbus.h"
 #include "southbridge/amd/rs780/rs780.h"
 
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
-
-void set_pcie_dereset()
+void set_pcie_dereset(void)
 {
 	u8 byte;
 	u16 word;
@@ -52,7 +49,7 @@ void set_pcie_dereset()
 	pci_write_config16(sm_dev, 0x7e, word);
 }
 
-void set_pcie_reset()
+void set_pcie_reset(void)
 {
 	u8 byte;
 	u16 word;
diff --git a/src/mainboard/gigabyte/ma785gmt/mainboard.c b/src/mainboard/gigabyte/ma785gmt/mainboard.c
index ce186bf587..48545a4535 100644
--- a/src/mainboard/gigabyte/ma785gmt/mainboard.c
+++ b/src/mainboard/gigabyte/ma785gmt/mainboard.c
@@ -34,10 +34,7 @@
 #define ADT7461_write_byte(address, val) \
 	do_smbus_write_byte(SMBUS_IO_BASE, ADT7461_ADDRESS, address, val)
 
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
-
-void set_pcie_dereset()
+void set_pcie_dereset(void)
 {
 	u8 byte;
 	u16 word;
@@ -62,7 +59,7 @@ void set_pcie_dereset()
 	pci_write_config16(sm_dev, 0x7e, word);
 }
 
-void set_pcie_reset()
+void set_pcie_reset(void)
 {
 	u8 byte;
 	u16 word;
diff --git a/src/mainboard/gigabyte/ma78gm/mainboard.c b/src/mainboard/gigabyte/ma78gm/mainboard.c
index 3e73f229e9..bfd083497e 100644
--- a/src/mainboard/gigabyte/ma78gm/mainboard.c
+++ b/src/mainboard/gigabyte/ma78gm/mainboard.c
@@ -25,13 +25,11 @@
 #include "southbridge/amd/sb700/smbus.h"
 #include "southbridge/amd/rs780/rs780.h"
 
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
 /*
  * ma78gm-us2h uses GPIO 6 as PCIe slot reset, GPIO4 as GFX slot reset. We need to
  * pull it up before training the slot.
  ***/
-void set_pcie_dereset()
+void set_pcie_dereset(void)
 {
 	u16 word;
 	struct device *sm_dev;
@@ -44,7 +42,7 @@ void set_pcie_dereset()
 	pci_write_config16(sm_dev, 0xA8, word);
 }
 
-void set_pcie_reset()
+void set_pcie_reset(void)
 {
 	u16 word;
 	struct device *sm_dev;
diff --git a/src/mainboard/iei/kino-780am2-fam10/mainboard.c b/src/mainboard/iei/kino-780am2-fam10/mainboard.c
index f75bec2f9f..b0ffef71f2 100644
--- a/src/mainboard/iei/kino-780am2-fam10/mainboard.c
+++ b/src/mainboard/iei/kino-780am2-fam10/mainboard.c
@@ -24,21 +24,10 @@
 #include "southbridge/amd/sb700/smbus.h"
 #include "southbridge/amd/rs780/rs780.h"
 
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
 /* TODO - Need to find GPIO for PCIE slot.
  * Kino uses GPIO ? as PCIe slot reset, GPIO? as GFX slot reset. We need to
  * pull it up before training the slot.
  ***/
-void set_pcie_dereset()
-{
-	/* PCIE slot not yet supported.*/
-}
-
-void set_pcie_reset()
-{
-	/* PCIE slot not yet supported.*/
-}
 
 int is_dev3_present(void)
 {
diff --git a/src/mainboard/jetway/pa78vm5/mainboard.c b/src/mainboard/jetway/pa78vm5/mainboard.c
index 906b070569..9585832ebe 100644
--- a/src/mainboard/jetway/pa78vm5/mainboard.c
+++ b/src/mainboard/jetway/pa78vm5/mainboard.c
@@ -25,14 +25,11 @@
 #include "southbridge/amd/sb700/smbus.h"
 #include "southbridge/amd/rs780/rs780.h"
 
-void set_pcie_dereset(void);
-void set_pcie_reset(void);
-
 /*
  * the board uses GPIO 6 as PCIe slot reset, GPIO4 as GFX slot reset. We need to
  * pull it up before training the slot.
  ***/
-void set_pcie_dereset()
+void set_pcie_dereset(void)
 {
 	u16 word;
 	struct device *sm_dev;
@@ -45,7 +42,7 @@ void set_pcie_dereset()
 	pci_write_config16(sm_dev, 0xA8, word);
 }
 
-void set_pcie_reset()
+void set_pcie_reset(void)
 {
 	u16 word;
 	struct device *sm_dev;
diff --git a/src/southbridge/amd/rs780/cmn.c b/src/southbridge/amd/rs780/cmn.c
index c39c6e9968..b849e1efa7 100644
--- a/src/southbridge/amd/rs780/cmn.c
+++ b/src/southbridge/amd/rs780/cmn.c
@@ -256,9 +256,6 @@ u8 PcieTrainPort(struct device *nb_dev, struct device *dev, u32 port)
 	u32 lc_state, reg, current_link_width, lane_mask;
 	int8_t current, res = 0;
 	u32 gfx_gpp_sb_sel;
-	void set_pcie_dereset(void);
-	void set_pcie_reset(void);
-
 	switch (port) {
 	case 2 ... 3:
 		gfx_gpp_sb_sel = PCIE_CORE_INDEX_GFX;
@@ -397,3 +394,11 @@ int is_family10h(void)
 {
 	return cpuidFamily() == 0x10;
 }
+
+__weak void set_pcie_reset(void)
+{
+}
+
+__weak void set_pcie_dereset(void)
+{
+}
diff --git a/src/southbridge/amd/rs780/gfx.c b/src/southbridge/amd/rs780/gfx.c
index 3152a14eb1..cfcddb29f3 100644
--- a/src/southbridge/amd/rs780/gfx.c
+++ b/src/southbridge/amd/rs780/gfx.c
@@ -36,9 +36,6 @@
 #include <cpu/x86/msr.h>
 #include "rs780.h"
 
-void set_pcie_reset(void);
-void set_pcie_dereset(void);
-
 /* Trust the original resource allocation. Don't do it again. */
 #undef DONT_TRUST_RESOURCE_ALLOCATION
 //#define DONT_TRUST_RESOURCE_ALLOCATION
diff --git a/src/southbridge/amd/rs780/rs780.h b/src/southbridge/amd/rs780/rs780.h
index a8bbbe2231..ce46d96760 100644
--- a/src/southbridge/amd/rs780/rs780.h
+++ b/src/southbridge/amd/rs780/rs780.h
@@ -223,5 +223,7 @@ void enable_rs780_dev8(void);
 void rs780_early_setup(void);
 void rs780_htinit(void);
 int is_dev3_present(void);
+void set_pcie_reset(void);
+void set_pcie_dereset(void);
 
 #endif /* __RS780_H__ */