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This is the last remainder from Yinghai's mega patch. It fixes issues with 

devices conflicting with the northbridge devices on PCI bus 0.

Signed-off-by: Yinghai Lu <yinghailu@gmail.com>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2681 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Yinghai Lu 2007-05-21 18:11:17 +00:00 committed by Stefan Reinauer
parent c141282193
commit ecad5df6b7
1 changed files with 31 additions and 12 deletions
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43
src/devices/hypertransport.c
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@ -383,6 +383,8 @@ unsigned int hypertransport_scan_chain(struct bus *bus,
struct ht_link prev;
device_t last_func = 0;
int ht_dev_num = 0;
unsigned temp_unitid;
unsigned not_use_count;
#if HT_CHAIN_END_UNITID_BASE < HT_CHAIN_UNITID_BASE
//let't record the device of last ht device, So we can set the Unitid to HT_CHAIN_END_UNITID_BASE
@ -473,39 +475,53 @@ unsigned int hypertransport_scan_chain(struct bus *bus,
if (flags & 0x1f) {
break;
}
flags &= ~0x1f; /* mask out base Unit ID */
flags |= next_unitid & 0x1f;
count = (flags >> 5) & 0x1f; /* get unit count */
not_use_count = 0;
temp_unitid = next_unitid;
#if HT_CHAIN_END_UNITID_BASE < HT_CHAIN_UNITID_BASE
if(offset_unitid) {
if((next_unitid+count)>=0x20) {
temp_unitid = HT_CHAIN_END_UNITID_BASE;
//still use the old next_unitid
not_use_count = 1;
}
}
#endif
flags |= temp_unitid & 0x1f;
pci_write_config16(dev, pos + PCI_CAP_FLAGS, flags);
/* Update the Unitd id in the device structure */
static_count = 1;
for(func = dev; func; func = func->sibling) {
func->path.u.pci.devfn += (next_unitid << 3);
func->path.u.pci.devfn += (temp_unitid << 3);
static_count = (func->path.u.pci.devfn >> 3)
- (dev->path.u.pci.devfn >> 3) + 1;
last_func = func;
}
/* Compute the number of unitids consumed */
count = (flags >> 5) & 0x1f; /* get unit count */
printk_spew("%s count: %04x static_count: %04x\n",
dev_path(dev), count, static_count);
if (count < static_count) {
count = static_count;
}
if(!not_use_count)
next_unitid += count;
/* Update the Unitid of the next device */
ht_unitid_base[ht_dev_num] = next_unitid;
ht_unitid_base[ht_dev_num] = temp_unitid;
ht_dev_num++;
#if HT_CHAIN_END_UNITID_BASE < HT_CHAIN_UNITID_BASE
if(offset_unitid) {
real_last_unitid = next_unitid;
real_last_pos = pos;
real_last_unitid = temp_unitid;
real_last_dev = dev;
}
#endif
next_unitid += count;
/* Setup the hypetransport link */
bus->reset_needed |= ht_setup_link(&prev, dev, pos);
@ -515,7 +531,7 @@ unsigned int hypertransport_scan_chain(struct bus *bus,
dev->vendor, dev->device,
(dev->enabled? "enabled": "disabled"), next_unitid);
} while((last_unitid != next_unitid) && (next_unitid <= (max_devfn >> 3)));
} while((last_unitid != next_unitid) && (next_unitid <= 0x1f /*(max_devfn >> 3)*/ ));
end_of_chain:
#if OPT_HT_LINK == 1
if(bus->reset_needed) {
@ -527,7 +543,7 @@ unsigned int hypertransport_scan_chain(struct bus *bus,
#endif
#if HT_CHAIN_END_UNITID_BASE < HT_CHAIN_UNITID_BASE
if(offset_unitid && (ht_dev_num>0)) {
if(offset_unitid && (ht_dev_num>1) && (real_last_unitid != HT_CHAIN_END_UNITID_BASE) ) {
uint16_t flags;
int i;
device_t last_func = 0;
@ -540,7 +556,7 @@ unsigned int hypertransport_scan_chain(struct bus *bus,
func->path.u.pci.devfn -= ((real_last_unitid - HT_CHAIN_END_UNITID_BASE) << 3);
last_func = func;
}
ht_unitid_base[ht_dev_num-1] = HT_CHAIN_END_UNITID_BASE; // update last one
next_unitid = real_last_unitid;
@ -550,6 +566,9 @@ unsigned int hypertransport_scan_chain(struct bus *bus,
if (next_unitid > 0x1f) {
next_unitid = 0x1f;
}
if( (bus->secondary == 0) && (next_unitid > 0x17)) {
next_unitid = 0x17; /* avoid K8 on bus 0 */
}
/* Die if any leftover Static devices are are found.
* There's probably a problem in the Config.lb.
@ -567,7 +586,7 @@ unsigned int hypertransport_scan_chain(struct bus *bus,
/* Now that nothing is overlapping it is safe to scan the
* children.
*/
max = pci_scan_bus(bus, 0x00, (next_unitid << 3)|7, max);
max = pci_scan_bus(bus, 0x00, ((next_unitid-1) << 3)|7, max);
return max;
}