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>

7 files changed, 7 insertions, 28 deletions

diff --git a/src/mainboard/tyan/s2881/Kconfig b/src/mainboard/tyan/s2881/Kconfig
index 6c759e1f0c..de641cd6fa 100644
--- a/src/mainboard/tyan/s2881/Kconfig
+++ b/src/mainboard/tyan/s2881/Kconfig
@@ -6,6 +6,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select NORTHBRIDGE_AMD_AMDK8
 	select SOUTHBRIDGE_AMD_AMD8131
 	select SOUTHBRIDGE_AMD_AMD8111
+	select HT_CHAIN_DISTRIBUTE
 	select SUPERIO_WINBOND_W83627HF
 	select HAVE_OPTION_TABLE
 	select HAVE_PIRQ_TABLE
@@ -24,10 +25,6 @@ config APIC_ID_OFFSET
 	hex
 	default 0x0
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 2
-
 config MAINBOARD_PART_NUMBER
 	string
 	default "S2881"
diff --git a/src/mainboard/tyan/s2885/Kconfig b/src/mainboard/tyan/s2885/Kconfig
index 86e43f8b9a..b218ab7eb6 100644
--- a/src/mainboard/tyan/s2885/Kconfig
+++ b/src/mainboard/tyan/s2885/Kconfig
@@ -7,6 +7,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select SOUTHBRIDGE_AMD_AMD8111
 	select SOUTHBRIDGE_AMD_AMD8131
 	select SOUTHBRIDGE_AMD_AMD8151
+	select HT_CHAIN_DISTRIBUTE
 	select SUPERIO_WINBOND_W83627HF
 	select HAVE_OPTION_TABLE
 	select HAVE_PIRQ_TABLE
@@ -23,10 +24,6 @@ config APIC_ID_OFFSET
 	hex
 	default 0x10
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 2
-
 config MAINBOARD_PART_NUMBER
 	string
 	default "S2885"
diff --git a/src/mainboard/tyan/s2891/Kconfig b/src/mainboard/tyan/s2891/Kconfig
index 3d1c1fb62f..238f5bc75e 100644
--- a/src/mainboard/tyan/s2891/Kconfig
+++ b/src/mainboard/tyan/s2891/Kconfig
@@ -6,6 +6,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select NORTHBRIDGE_AMD_AMDK8
 	select SOUTHBRIDGE_NVIDIA_CK804
 	select SOUTHBRIDGE_AMD_AMD8131
+	select HT_CHAIN_DISTRIBUTE
 	select SUPERIO_WINBOND_W83627HF
 	select HAVE_OPTION_TABLE
 	select HAVE_PIRQ_TABLE
@@ -23,10 +24,6 @@ config APIC_ID_OFFSET
 	hex
 	default 0x10
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 2
-
 config MAINBOARD_PART_NUMBER
 	string
 	default "S2891"
diff --git a/src/mainboard/tyan/s2892/Kconfig b/src/mainboard/tyan/s2892/Kconfig
index b9c4105e75..cbe076c5da 100644
--- a/src/mainboard/tyan/s2892/Kconfig
+++ b/src/mainboard/tyan/s2892/Kconfig
@@ -6,6 +6,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select NORTHBRIDGE_AMD_AMDK8
 	select SOUTHBRIDGE_NVIDIA_CK804
 	select SOUTHBRIDGE_AMD_AMD8131
+	select HT_CHAIN_DISTRIBUTE
 	select SUPERIO_WINBOND_W83627HF
 	select HAVE_OPTION_TABLE
 	select HAVE_PIRQ_TABLE
@@ -43,10 +44,6 @@ config HT_CHAIN_END_UNITID_BASE
 	hex
 	default 0x20
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 2
-
 config IRQ_SLOT_COUNT
 	int
 	default 11
diff --git a/src/mainboard/tyan/s2895/Kconfig b/src/mainboard/tyan/s2895/Kconfig
index 544b0c59f5..21db63ccaf 100644
--- a/src/mainboard/tyan/s2895/Kconfig
+++ b/src/mainboard/tyan/s2895/Kconfig
@@ -6,6 +6,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select NORTHBRIDGE_AMD_AMDK8
 	select SOUTHBRIDGE_NVIDIA_CK804
 	select SOUTHBRIDGE_AMD_AMD8131
+	select HT_CHAIN_DISTRIBUTE
 	select SUPERIO_SMSC_LPC47B397
 	select HAVE_OPTION_TABLE
 	select HAVE_PIRQ_TABLE
@@ -47,10 +48,6 @@ config HT_CHAIN_END_UNITID_BASE
 	hex
 	default 0x20
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 2
-
 config IRQ_SLOT_COUNT
 	int
 	default 11
diff --git a/src/mainboard/tyan/s2912/Kconfig b/src/mainboard/tyan/s2912/Kconfig
index 26d9a530e1..7ad1a1ce31 100644
--- a/src/mainboard/tyan/s2912/Kconfig
+++ b/src/mainboard/tyan/s2912/Kconfig
@@ -7,6 +7,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select DIMM_REGISTERED
 	select NORTHBRIDGE_AMD_AMDK8
 	select SOUTHBRIDGE_NVIDIA_MCP55
+	select HT_CHAIN_DISTRIBUTE
 	select MCP55_USE_NIC
 	select SUPERIO_WINBOND_W83627HF
 	select PARALLEL_CPU_INIT
@@ -38,10 +39,6 @@ config MEM_TRAIN_SEQ
 	int
 	default 1
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 2
-
 config MAINBOARD_PART_NUMBER
 	string
 	default "S2912"
diff --git a/src/mainboard/tyan/s2912_fam10/Kconfig b/src/mainboard/tyan/s2912_fam10/Kconfig
index 1dd74ca9e5..b5e31fa779 100644
--- a/src/mainboard/tyan/s2912_fam10/Kconfig
+++ b/src/mainboard/tyan/s2912_fam10/Kconfig
@@ -7,6 +7,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select DIMM_REGISTERED
 	select NORTHBRIDGE_AMD_AMDFAM10
 	select SOUTHBRIDGE_NVIDIA_MCP55
+	select HT_CHAIN_DISTRIBUTE
 	select MCP55_USE_NIC
 	select SUPERIO_WINBOND_W83627HF
 	select PARALLEL_CPU_INIT
@@ -35,10 +36,6 @@ config APIC_ID_OFFSET
 	hex
 	default 0
 
-config SB_HT_CHAIN_ON_BUS0
-	int
-	default 2
-
 config MAINBOARD_PART_NUMBER
 	string
 	default "S2912 (Fam10)"