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authorYinghai Lu <yinghailu@gmail.com>2005-12-06 23:40:58 +0000
committerYinghai Lu <yinghailu@gmail.com>2005-12-06 23:40:58 +0000
commitb3b1b2d3fbdae2409279a08da80c592da78ab13b (patch)
tree0c0509f32e2c66971bd69fb1f6e027400233c5eb /src/northbridge/amd/amdk8
parent968bbe89cdc0a8bb47852388842bdf4ab625126e (diff)
downloadcoreboot-b3b1b2d3fbdae2409279a08da80c592da78ab13b.tar.xz
from issue 47, put chain on bus 0, 0x40, 0x80, 0xc0
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2137 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/northbridge/amd/amdk8')
-rw-r--r--src/northbridge/amd/amdk8/northbridge.c43
1 files changed, 35 insertions, 8 deletions
diff --git a/src/northbridge/amd/amdk8/northbridge.c b/src/northbridge/amd/amdk8/northbridge.c
index d7d2f2daf1..097554f65e 100644
--- a/src/northbridge/amd/amdk8/northbridge.c
+++ b/src/northbridge/amd/amdk8/northbridge.c
@@ -113,6 +113,8 @@ static unsigned int amdk8_scan_chain(device_t dev, unsigned nodeid, unsigned lin
uint32_t busses, config_busses;
unsigned free_reg, config_reg;
unsigned ht_unitid_base[4]; // here assume only 4 HT device on chain
+ unsigned max_bus;
+ unsigned min_bus;
dev->link[link].cap = 0x80 + (link *0x20);
do {
@@ -158,15 +160,40 @@ static unsigned int amdk8_scan_chain(device_t dev, unsigned nodeid, unsigned lin
* 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 K8_SB_HT_CHAIN_ON_BUS0 == 1
- if((nodeid == 0) && (sblink==link)) { // actually max is 0 here
- dev->link[link].secondary = max;
- }
- else
+#if K8_SB_HT_CHAIN_ON_BUS0 > 0
+ # if K8_SB_HT_CHAIN_ON_BUS0 > 1
+ // first chain will on bus 0, second chain will be on 0x40, third 0x80, forth 0xc0
+ if(max == 0) {
+ min_bus = 0;
+ max_bus = 0x3f;
+ } else if (max<0x40) {
+ min_bus = 0x40;
+ max_bus = 0x7f;
+ } else if (max<0x80) {
+ min_bus = 0x80;
+ max_bus = 0xbf;
+ } else {
+ min_bus = 0xc0;
+ max_bus = 0xff;
+ }
+ max = min_bus;
+ #else
+ // only sb ht chain will on bus 0, other ...
+ if((nodeid == 0) && (sblink==link)) { // actually max is 0 here
+ min_bus = max;
+ }
+ else {
+ min_bus = ++max;
+ }
+ max_bus = 0xff;
+ #endif
+#else
+ min_bus = ++max;
+ max_bus = 0xff;
#endif
- dev->link[link].secondary = ++max;
-
- dev->link[link].subordinate = 0xff;
+
+ dev->link[link].secondary = min_bus;
+ dev->link[link].subordinate = max_bus;
/* Read the existing primary/secondary/subordinate bus
* number configuration.