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fix bus problem with s2885 with issue 47 

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2140 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Yinghai Lu 2005-12-08 18:47:33 +00:00
parent c3b3600222
commit 653ee54a88
1 changed files with 11 additions and 17 deletions
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28
src/northbridge/amd/amdk8/northbridge.c
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@ -161,36 +161,30 @@ static unsigned int amdk8_scan_chain(device_t dev, unsigned nodeid, unsigned lin
* so we set the subordinate bus number to 0xff for the moment. * so we set the subordinate bus number to 0xff for the moment.
*/ */
#if K8_SB_HT_CHAIN_ON_BUS0 > 0 #if K8_SB_HT_CHAIN_ON_BUS0 > 0
# if K8_SB_HT_CHAIN_ON_BUS0 > 1 // first chain will on bus 0
// first chain will on bus 0, second chain will be on 0x40, third 0x80, forth 0xc0 if((nodeid == 0) && (sblink==link)) { // actually max is 0 here
if(max == 0) { min_bus = max;
min_bus = 0; }
max_bus = 0x3f; #if K8_SB_HT_CHAIN_ON_BUS0 > 1
} else if (max<0x40) { // second chain will be on 0x40, third 0x80, forth 0xc0
else if (max<0x40) {
min_bus = 0x40; min_bus = 0x40;
max_bus = 0x7f;
} else if (max<0x80) { } else if (max<0x80) {
min_bus = 0x80; min_bus = 0x80;
max_bus = 0xbf;
} else { } else {
min_bus = 0xc0; min_bus = 0xc0;
max_bus = 0xff;
} }
max = min_bus; max = min_bus;
#else #else
// only sb ht chain will on bus 0, other ... //other ...
if((nodeid == 0) && (sblink==link)) { // actually max is 0 here
min_bus = max;
}
else { else {
min_bus = ++max; min_bus = ++max;
} }
max_bus = 0xff;
#endif #endif
#else #else
min_bus = ++max; min_bus = ++max;
max_bus = 0xff;
#endif #endif
max_bus = 0xff;
dev->link[link].secondary = min_bus; dev->link[link].secondary = min_bus;
dev->link[link].subordinate = max_bus; dev->link[link].subordinate = max_bus;
@ -287,7 +281,7 @@ static unsigned int amdk8_scan_chains(device_t dev, unsigned int max)
if(nodeid==0) { if(nodeid==0) {
sblink = (pci_read_config32(dev, 0x64)>>8) & 3; sblink = (pci_read_config32(dev, 0x64)>>8) & 3;
#if K8_SB_HT_CHAIN_ON_BUS0 == 1 #if K8_SB_HT_CHAIN_ON_BUS0 > 0
#if HT_CHAIN_UNITID_BASE != 1 #if HT_CHAIN_UNITID_BASE != 1
offset_unitid = 1; offset_unitid = 1;
#endif #endif
@ -296,7 +290,7 @@ static unsigned int amdk8_scan_chains(device_t dev, unsigned int max)
} }
for(link = 0; link < dev->links; link++) { for(link = 0; link < dev->links; link++) {
#if K8_SB_HT_CHAIN_ON_BUS0 == 1 #if K8_SB_HT_CHAIN_ON_BUS0 > 0
if( (nodeid == 0) && (sblink == link) ) continue; //already done if( (nodeid == 0) && (sblink == link) ) continue; //already done
#endif #endif
offset_unitid = 0; offset_unitid = 0;