AMD K8 fam10: Refactor Kconfig SB_HT_CHAIN_ON_BUS0

If SB_HT_CHAIN_ON_BUS0 is selected, HyperTransport chain for System Bus
is the first to scan and it will be assigned with bus number 0.

If HT_CHAIN_DISTRIBUTE is selected, each link will reserve a fixed range
of bus numbers instead of assigning consecutive numbers across all the links.

All fam10 have SB_HT_CHAIN_ON_BUS0 selected under northbridge.
Follow-up can easily drop this if we find this is dictated by architecture.

Change-Id: I8deddcb4c3fd679b6b27e2879d9dba3895c4dd6f
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/8366
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
Reviewed-by: Timothy Pearson <tpearson@raptorengineeringinc.com>

12 files changed, 2 insertions, 48 deletions

diff --git a/src/mainboard/asus/a8n_e/Kconfig b/src/mainboard/asus/a8n_e/Kconfig
index 5b7c1e6e4a..1852ae45e0 100644
--- a/src/mainboard/asus/a8n_e/Kconfig
+++ b/src/mainboard/asus/a8n_e/Kconfig
@@ -5,6 +5,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select CPU_AMD_SOCKET_939
 	select NORTHBRIDGE_AMD_AMDK8
 	select SOUTHBRIDGE_NVIDIA_CK804
+	select HT_CHAIN_DISTRIBUTE
 	select SUPERIO_ITE_IT8712F
 	select HAVE_OPTION_TABLE
 	select HAVE_CMOS_DEFAULT
@@ -54,10 +55,6 @@ config HT_CHAIN_UNITID_BASE
 	hex
 	default 0x0
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 2
-
 config IRQ_SLOT_COUNT
 	int
 	default 13
diff --git a/src/mainboard/asus/a8v-e_deluxe/Kconfig b/src/mainboard/asus/a8v-e_deluxe/Kconfig
index 8ebff310fb..a1c2fd9732 100644
--- a/src/mainboard/asus/a8v-e_deluxe/Kconfig
+++ b/src/mainboard/asus/a8v-e_deluxe/Kconfig
@@ -33,10 +33,6 @@ config APIC_ID_OFFSET
 	hex
 	default 0x10
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 1
-
 config MAINBOARD_PART_NUMBER
 	string
 	default "A8V-E Deluxe"
diff --git a/src/mainboard/asus/a8v-e_se/Kconfig b/src/mainboard/asus/a8v-e_se/Kconfig
index d819b0dad9..dffe9eb14f 100644
--- a/src/mainboard/asus/a8v-e_se/Kconfig
+++ b/src/mainboard/asus/a8v-e_se/Kconfig
@@ -33,10 +33,6 @@ config APIC_ID_OFFSET
 	hex
 	default 0x10
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 1
-
 config MAINBOARD_PART_NUMBER
 	string
 	default "A8V-E SE"
diff --git a/src/mainboard/asus/k8v-x/Kconfig b/src/mainboard/asus/k8v-x/Kconfig
index 1deb5b673f..52bf661f79 100644
--- a/src/mainboard/asus/k8v-x/Kconfig
+++ b/src/mainboard/asus/k8v-x/Kconfig
@@ -32,10 +32,6 @@ config APIC_ID_OFFSET
 	hex
 	default 0x10
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 1
-
 config MAINBOARD_PART_NUMBER
 	string
 	default "K8V-X"
diff --git a/src/mainboard/asus/kfsn4-dre/Kconfig b/src/mainboard/asus/kfsn4-dre/Kconfig
index 47fccdace4..2750c17822 100644
--- a/src/mainboard/asus/kfsn4-dre/Kconfig
+++ b/src/mainboard/asus/kfsn4-dre/Kconfig
@@ -44,10 +44,6 @@ config APIC_ID_OFFSET
 	hex
 	default 0
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 1
-
 config MAINBOARD_PART_NUMBER
 	string
 	default "KFSN4-DRE"
diff --git a/src/mainboard/asus/m2n-e/Kconfig b/src/mainboard/asus/m2n-e/Kconfig
index b7375f2090..02e516e426 100644
--- a/src/mainboard/asus/m2n-e/Kconfig
+++ b/src/mainboard/asus/m2n-e/Kconfig
@@ -26,6 +26,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select DIMM_DDR2
 	select NORTHBRIDGE_AMD_AMDK8
 	select SOUTHBRIDGE_NVIDIA_MCP55
+	select HT_CHAIN_DISTRIBUTE
 	select MCP55_USE_NIC
 	select MCP55_USE_AZA
 	select SUPERIO_ITE_IT8716F
@@ -57,10 +58,6 @@ config MEM_TRAIN_SEQ
 	int
 	default 2
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 2
-
 config MAINBOARD_PART_NUMBER
 	string
 	default "M2N-E"
diff --git a/src/mainboard/asus/m2v-mx_se/Kconfig b/src/mainboard/asus/m2v-mx_se/Kconfig
index ab155b9567..efcfc81921 100644
--- a/src/mainboard/asus/m2v-mx_se/Kconfig
+++ b/src/mainboard/asus/m2v-mx_se/Kconfig
@@ -67,10 +67,6 @@ config HT_CHAIN_UNITID_BASE
 	hex
 	default 0x0
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 1
-
 config HT_CHAIN_END_UNITID_BASE
 	hex
 	default 0x20
diff --git a/src/mainboard/asus/m2v/Kconfig b/src/mainboard/asus/m2v/Kconfig
index 35ad38dd1b..72527be3bb 100644
--- a/src/mainboard/asus/m2v/Kconfig
+++ b/src/mainboard/asus/m2v/Kconfig
@@ -36,10 +36,6 @@ config APIC_ID_OFFSET
 	hex
 	default 0x10
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 1
-
 config MAINBOARD_PART_NUMBER
 	string
 	default "M2V"
diff --git a/src/mainboard/asus/m4a78-em/Kconfig b/src/mainboard/asus/m4a78-em/Kconfig
index b00a0b6014..0382daf731 100644
--- a/src/mainboard/asus/m4a78-em/Kconfig
+++ b/src/mainboard/asus/m4a78-em/Kconfig
@@ -39,10 +39,6 @@ config MAX_PHYSICAL_CPUS
 	int
 	default 2
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 1
-
 config HT_CHAIN_END_UNITID_BASE
 	hex
 	default 0x1
diff --git a/src/mainboard/asus/m4a785-m/Kconfig b/src/mainboard/asus/m4a785-m/Kconfig
index f93c48464d..a945d2a16a 100644
--- a/src/mainboard/asus/m4a785-m/Kconfig
+++ b/src/mainboard/asus/m4a785-m/Kconfig
@@ -40,10 +40,6 @@ config MAX_PHYSICAL_CPUS
 	int
 	default 2
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 1
-
 config HT_CHAIN_END_UNITID_BASE
 	hex
 	default 0x1
diff --git a/src/mainboard/asus/m4a785t-m/Kconfig b/src/mainboard/asus/m4a785t-m/Kconfig
index d98ad959bf..a347f02039 100644
--- a/src/mainboard/asus/m4a785t-m/Kconfig
+++ b/src/mainboard/asus/m4a785t-m/Kconfig
@@ -42,10 +42,6 @@ config MAX_PHYSICAL_CPUS
 	int
 	default 2
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 1
-
 config HT_CHAIN_END_UNITID_BASE
 	hex
 	default 0x1
diff --git a/src/mainboard/asus/m5a88-v/Kconfig b/src/mainboard/asus/m5a88-v/Kconfig
index 143018948a..a5f19f5bd4 100644
--- a/src/mainboard/asus/m5a88-v/Kconfig
+++ b/src/mainboard/asus/m5a88-v/Kconfig
@@ -50,10 +50,6 @@ config HW_MEM_HOLE_SIZE_AUTO_INC
 	bool
 	default n
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 1
-
 config HT_CHAIN_END_UNITID_BASE
 	hex
 	default 0x1