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-rw-r--r--src/northbridge/amd/amdfam10/northbridge.c36
-rw-r--r--src/northbridge/amd/amdk8/northbridge.c28
2 files changed, 26 insertions, 38 deletions
diff --git a/src/northbridge/amd/amdfam10/northbridge.c b/src/northbridge/amd/amdfam10/northbridge.c
index fd134a2a80..caf5410618 100644
--- a/src/northbridge/amd/amdfam10/northbridge.c
+++ b/src/northbridge/amd/amdfam10/northbridge.c
@@ -218,29 +218,25 @@ static u32 amdfam10_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool
* We have no idea how many busses are behind this bridge yet,
* so we set the subordinate bus number to 0xff for the moment.
*/
-#if CONFIG_SB_HT_CHAIN_ON_BUS0 > 0
- // first chain will on bus 0
- if (is_sblink) { // actually max is 0 here
- min_bus = max;
- }
- #if CONFIG_SB_HT_CHAIN_ON_BUS0 > 1
- // second chain will be on 0x40, third 0x80, forth 0xc0
- // i would refined that to 2, 3, 4 ==> 0, 0x, 40, 0x80, 0xc0
- // >4 will use more segments, We can have 16 segmment and every segment have 256 bus, For that case need the kernel support mmio pci config.
- else {
+
+ if (CONFIG_SB_HT_CHAIN_ON_BUS0 == 0) {
+ min_bus = ++max;
+ } else if (is_sblink) {
+ // first chain will on bus 0
+ min_bus = max; /* actually max is 0 here */
+ } else if (CONFIG_SB_HT_CHAIN_ON_BUS0 == 1) {
+ min_bus = ++max;
+ } else if (CONFIG_SB_HT_CHAIN_ON_BUS0 > 1) {
+ // second chain will be on 0x40, third 0x80, forth 0xc0
+ // i would refined that to 2, 3, 4 ==> 0, 0x, 40, 0x80, 0xc0
+ // >4 will use more segments,
+ // We can have 16 segmment and every segment have 256 bus,
+ // For that case need the kernel support mmio pci config.
+
/* One node can have 8 link and segn is the same. */
min_bus = (((max & 0xff) >> 3) + 1) << 3;
+ max = min_bus;
}
- max = min_bus;
- #else
- //other ...
- else {
- min_bus = ++max;
- }
- #endif
-#else
- min_bus = ++max;
-#endif
link->secondary = min_bus;
link->subordinate = link->secondary;
diff --git a/src/northbridge/amd/amdk8/northbridge.c b/src/northbridge/amd/amdk8/northbridge.c
index 018b68a8d6..b27404e6e7 100644
--- a/src/northbridge/amd/amdk8/northbridge.c
+++ b/src/northbridge/amd/amdk8/northbridge.c
@@ -179,26 +179,18 @@ static u32 amdk8_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool is_
* We have no idea how many busses are behind this bridge yet,
* so we set the subordinate bus number to 0xff for the moment.
*/
-#if CONFIG_SB_HT_CHAIN_ON_BUS0 > 0
- // first chain will on bus 0
- if(is_sblink) { // actually max is 0 here
- min_bus = max;
- }
- #if CONFIG_SB_HT_CHAIN_ON_BUS0 > 1
- // second chain will be on 0x40, third 0x80, forth 0xc0
- else {
- min_bus = ((max>>6) + 1) * 0x40;
- }
- max = min_bus;
- #else
- //other ...
- else {
+ if (CONFIG_SB_HT_CHAIN_ON_BUS0 == 0) {
+ min_bus = ++max;
+ } else if (is_sblink) {
+ // first chain will on bus 0
+ min_bus = max; /* actually max is 0 here */
+ } else if (CONFIG_SB_HT_CHAIN_ON_BUS0 == 1) {
min_bus = ++max;
+ } else if (CONFIG_SB_HT_CHAIN_ON_BUS0 > 1) {
+ /* Second chain will be on 0x40, third 0x80, forth 0xc0. */
+ min_bus = (max & ~0x3f) + 0x40;
+ max = min_bus;
}
- #endif
-#else
- min_bus = ++max;
-#endif
link->secondary = min_bus;
link->subordinate = link->secondary;