Enable mahogany_fam10 and Kino family 10h to run the SB HT link at the expected HT3 frequency and width by matching the BUID swap list to the production BIOS. In addition, the BUID swap list has been moved into the project-specific file romstage.c for the other 13 AMD family 10h projects as well. For projects using a desktop AMD family 10h processor, pasting in the mahogany_fam10 swap list will likely allow HT3 operation. This should be confirmed on real hardware before commiting any swap list change. A different swap list will be needed for server projects. For serengeti_cheetah_fam10, a reference BIOS swap list to try is: 0x00, 0x0A, 0x00, 0x06, 0xFF, 0x0A, 0x06, 0xFF.

The patch makes these changes:

1) Remove the BUID swap list from ht_wrapper.c and put it in each of 15
   romstage.c files where it is used (AMD family 10h projects).
2) Add a prototype to amdfam10.h.
3) Modify the swap list and test in real hardware for mahogany_fam10 and
   kino family 10h and confirm HT3 operation for the SB link.

Abuild tested.

Signed-off-by: Scott Duplichan <sc...@notabs.org>
Acked-by: Stefan Reinauer <stefan.reinauer@coreboot.org>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6439 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

15 files changed, 501 insertions, 0 deletions

diff --git a/src/mainboard/amd/bimini_fam10/romstage.c b/src/mainboard/amd/bimini_fam10/romstage.c
index e3955748b5..aba31fcb3c 100644
--- a/src/mainboard/amd/bimini_fam10/romstage.c
+++ b/src/mainboard/amd/bimini_fam10/romstage.c
@@ -237,3 +237,34 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
 	post_code(0x43);	// Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+
+	return 0;
+}
diff --git a/src/mainboard/amd/mahogany_fam10/romstage.c b/src/mainboard/amd/mahogany_fam10/romstage.c
index c8296441e3..40e8a170b5 100644
--- a/src/mainboard/amd/mahogany_fam10/romstage.c
+++ b/src/mainboard/amd/mahogany_fam10/romstage.c
@@ -232,3 +232,34 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
 	post_code(0x43);	// Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = {0, 1, 0xFF, 0, 0xFF};
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+
+	return 0;
+}
diff --git a/src/mainboard/amd/serengeti_cheetah_fam10/romstage.c b/src/mainboard/amd/serengeti_cheetah_fam10/romstage.c
index cbffa8db37..b64e16e183 100644
--- a/src/mainboard/amd/serengeti_cheetah_fam10/romstage.c
+++ b/src/mainboard/amd/serengeti_cheetah_fam10/romstage.c
@@ -337,3 +337,37 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
 	post_code(0x43);	// Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+	if ((CONFIG_HT_CHAIN_UNITID_BASE != 0) && (CONFIG_HT_CHAIN_END_UNITID_BASE != 0)) {
+		printk(BIOS_DEBUG, "AMD_CB_ManualBUIDSwapList()\n");
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/mainboard/amd/tilapia_fam10/romstage.c b/src/mainboard/amd/tilapia_fam10/romstage.c
index 67a1e4eb61..ea8ec41fdd 100644
--- a/src/mainboard/amd/tilapia_fam10/romstage.c
+++ b/src/mainboard/amd/tilapia_fam10/romstage.c
@@ -231,3 +231,37 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
 	post_code(0x43);	// Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+	if ((CONFIG_HT_CHAIN_UNITID_BASE != 0) && (CONFIG_HT_CHAIN_END_UNITID_BASE != 0)) {
+		printk(BIOS_DEBUG, "AMD_CB_ManualBUIDSwapList()\n");
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/mainboard/asus/m4a78-em/romstage.c b/src/mainboard/asus/m4a78-em/romstage.c
index 99cd405064..4c9543beb1 100644
--- a/src/mainboard/asus/m4a78-em/romstage.c
+++ b/src/mainboard/asus/m4a78-em/romstage.c
@@ -232,3 +232,37 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
 	post_code(0x43);	// Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+	if ((CONFIG_HT_CHAIN_UNITID_BASE != 0) && (CONFIG_HT_CHAIN_END_UNITID_BASE != 0)) {
+		printk(BIOS_DEBUG, "AMD_CB_ManualBUIDSwapList()\n");
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/mainboard/asus/m4a785-m/romstage.c b/src/mainboard/asus/m4a785-m/romstage.c
index 99cd405064..4c9543beb1 100644
--- a/src/mainboard/asus/m4a785-m/romstage.c
+++ b/src/mainboard/asus/m4a785-m/romstage.c
@@ -232,3 +232,37 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
 	post_code(0x43);	// Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+	if ((CONFIG_HT_CHAIN_UNITID_BASE != 0) && (CONFIG_HT_CHAIN_END_UNITID_BASE != 0)) {
+		printk(BIOS_DEBUG, "AMD_CB_ManualBUIDSwapList()\n");
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/mainboard/gigabyte/ma785gmt/romstage.c b/src/mainboard/gigabyte/ma785gmt/romstage.c
index 0be9bac1d9..7826661042 100644
--- a/src/mainboard/gigabyte/ma785gmt/romstage.c
+++ b/src/mainboard/gigabyte/ma785gmt/romstage.c
@@ -228,3 +228,37 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
 	post_code(0x43);	// Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+	if ((CONFIG_HT_CHAIN_UNITID_BASE != 0) && (CONFIG_HT_CHAIN_END_UNITID_BASE != 0)) {
+		printk(BIOS_DEBUG, "AMD_CB_ManualBUIDSwapList()\n");
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/mainboard/gigabyte/ma78gm/romstage.c b/src/mainboard/gigabyte/ma78gm/romstage.c
index aa86a8e112..15ae9024c5 100644
--- a/src/mainboard/gigabyte/ma78gm/romstage.c
+++ b/src/mainboard/gigabyte/ma78gm/romstage.c
@@ -230,3 +230,37 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
 	post_code(0x43);	// Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+	if ((CONFIG_HT_CHAIN_UNITID_BASE != 0) && (CONFIG_HT_CHAIN_END_UNITID_BASE != 0)) {
+		printk(BIOS_DEBUG, "AMD_CB_ManualBUIDSwapList()\n");
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/mainboard/hp/dl165_g6_fam10/romstage.c b/src/mainboard/hp/dl165_g6_fam10/romstage.c
index b2b3f5197c..99f05950da 100644
--- a/src/mainboard/hp/dl165_g6_fam10/romstage.c
+++ b/src/mainboard/hp/dl165_g6_fam10/romstage.c
@@ -222,3 +222,37 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 
 	post_cache_as_ram();
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+	if ((CONFIG_HT_CHAIN_UNITID_BASE != 0) && (CONFIG_HT_CHAIN_END_UNITID_BASE != 0)) {
+		printk(BIOS_DEBUG, "AMD_CB_ManualBUIDSwapList()\n");
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/mainboard/iei/kino-780am2-fam10/romstage.c b/src/mainboard/iei/kino-780am2-fam10/romstage.c
index 64df5b29e1..d4f2dc0a72 100644
--- a/src/mainboard/iei/kino-780am2-fam10/romstage.c
+++ b/src/mainboard/iei/kino-780am2-fam10/romstage.c
@@ -233,3 +233,34 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
 	post_code(0x43);	// Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = {0, 1, 0xFF, 0, 0xFF};
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+
+	return 0;
+}
diff --git a/src/mainboard/jetway/pa78vm5/romstage.c b/src/mainboard/jetway/pa78vm5/romstage.c
index d4d9a7a824..629b13a078 100644
--- a/src/mainboard/jetway/pa78vm5/romstage.c
+++ b/src/mainboard/jetway/pa78vm5/romstage.c
@@ -238,3 +238,37 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
 	post_code(0x43);	// Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+	if ((CONFIG_HT_CHAIN_UNITID_BASE != 0) && (CONFIG_HT_CHAIN_END_UNITID_BASE != 0)) {
+		printk(BIOS_DEBUG, "AMD_CB_ManualBUIDSwapList()\n");
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/mainboard/msi/ms9652_fam10/romstage.c b/src/mainboard/msi/ms9652_fam10/romstage.c
index 9567d2c7f3..16baac29a5 100644
--- a/src/mainboard/msi/ms9652_fam10/romstage.c
+++ b/src/mainboard/msi/ms9652_fam10/romstage.c
@@ -253,3 +253,37 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
 	post_code(0x43);	// Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+	if ((CONFIG_HT_CHAIN_UNITID_BASE != 0) && (CONFIG_HT_CHAIN_END_UNITID_BASE != 0)) {
+		printk(BIOS_DEBUG, "AMD_CB_ManualBUIDSwapList()\n");
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/mainboard/supermicro/h8dmr_fam10/romstage.c b/src/mainboard/supermicro/h8dmr_fam10/romstage.c
index c949f26539..50ad6a0584 100644
--- a/src/mainboard/supermicro/h8dmr_fam10/romstage.c
+++ b/src/mainboard/supermicro/h8dmr_fam10/romstage.c
@@ -246,3 +246,37 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram(); // BSP switch stack to ram, copy + execute stage 2
 	post_code(0x42);     // Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+	if ((CONFIG_HT_CHAIN_UNITID_BASE != 0) && (CONFIG_HT_CHAIN_END_UNITID_BASE != 0)) {
+		printk(BIOS_DEBUG, "AMD_CB_ManualBUIDSwapList()\n");
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/mainboard/supermicro/h8qme_fam10/romstage.c b/src/mainboard/supermicro/h8qme_fam10/romstage.c
index f3f56c4241..dbef8e9e10 100644
--- a/src/mainboard/supermicro/h8qme_fam10/romstage.c
+++ b/src/mainboard/supermicro/h8qme_fam10/romstage.c
@@ -295,3 +295,37 @@ post_code(0x40);
  post_cache_as_ram();  // BSP switch stack to ram, copy then execute LB.
  post_code(0x42);  // Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+	if ((CONFIG_HT_CHAIN_UNITID_BASE != 0) && (CONFIG_HT_CHAIN_END_UNITID_BASE != 0)) {
+		printk(BIOS_DEBUG, "AMD_CB_ManualBUIDSwapList()\n");
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/mainboard/tyan/s2912_fam10/romstage.c b/src/mainboard/tyan/s2912_fam10/romstage.c
index d809ff26f7..ed3ee8b4b4 100644
--- a/src/mainboard/tyan/s2912_fam10/romstage.c
+++ b/src/mainboard/tyan/s2912_fam10/romstage.c
@@ -250,3 +250,37 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
 	post_cache_as_ram();	// BSP switch stack to ram, copy then execute LB.
 	post_code(0x43);	// Should never see this post code.
 }
+
+/**
+ * BOOL AMD_CB_ManualBUIDSwapList(u8 Node, u8 Link, u8 **List)
+ * Description:
+ *	This routine is called every time a non-coherent chain is processed.
+ *	BUID assignment may be controlled explicitly on a non-coherent chain. Provide a
+ *	swap list. The first part of the list controls the BUID assignment and the
+ *	second part of the list provides the device to device linking.  Device orientation
+ *	can be detected automatically, or explicitly.  See documentation for more details.
+ *
+ *	Automatic non-coherent init assigns BUIDs starting at 1 and incrementing sequentially
+ *	based on each device's unit count.
+ *
+ * Parameters:
+ *	@param[in]  u8  node    = The node on which this chain is located
+ *	@param[in]  u8  link    = The link on the host for this chain
+ *	@param[out] u8** list   = supply a pointer to a list
+ *	@param[out] BOOL result = true to use a manual list
+ *				  false to initialize the link automatically
+ */
+BOOL AMD_CB_ManualBUIDSwapList (u8 node, u8 link, const u8 **List)
+{
+	static const u8 swaplist[] = { 0xFF, CONFIG_HT_CHAIN_UNITID_BASE, CONFIG_HT_CHAIN_END_UNITID_BASE, 0xFF };
+	/* If the BUID was adjusted in early_ht we need to do the manual override */
+	if ((CONFIG_HT_CHAIN_UNITID_BASE != 0) && (CONFIG_HT_CHAIN_END_UNITID_BASE != 0)) {
+		printk(BIOS_DEBUG, "AMD_CB_ManualBUIDSwapList()\n");
+		if ((node == 0) && (link == 0)) {	/* BSP SB link */
+			*List = swaplist;
+			return 1;
+		}
+	}
+
+	return 0;
+}