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authorYinghai Lu <yinghai.lu@amd.com>2007-09-14 14:58:33 +0000
committerStefan Reinauer <stepan@openbios.org>2007-09-14 14:58:33 +0000
commit18c70d7222bcea65d08e1ff879d8f69f2705e7ab (patch)
treecea44a5202a4bcaffd52533c76fb2d33ab1fb664 /src/devices/hypertransport.c
parent3335adb771c5e6bf2fb200285a8af7134446bb71 (diff)
More range for HT_CHAIN_UNITID_BASE and HT_CHAIN_END_UNITID_BASE.
For example: in C51/MCP55 or C51/MCP51 Will allow 1. C51 at 0x10 to 0x14, and MCP at 0 to 4 2. C51 at 1 to 4, and MCP at 7 to 0x0a The reason is c51/mcp51/mcp55 reported unitid is 0x0f (far beyond it needed), and will prevent us from putting them on bus 0. Typical values for c51/mcp55 or c51/mcp51: HT_CHAIN_UNITID_BASE = 0x10 # for C51 HT_CHAIN_END_UNITID_BASE = 0 # for mcp If only have mcp with c51, HT_CHAIN_UNITID_BASE = 0 # for MCP #HT_CHAIN_END_UNITID_BASE = 0 # default value 0x20 Signed-off-by: Yinghai Lu <yinghai.lu@amd.com> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2776 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/devices/hypertransport.c')
-rw-r--r--src/devices/hypertransport.c61
1 files changed, 34 insertions, 27 deletions
diff --git a/src/devices/hypertransport.c b/src/devices/hypertransport.c
index d1e3468874..9846794edd 100644
--- a/src/devices/hypertransport.c
+++ b/src/devices/hypertransport.c
@@ -383,14 +383,14 @@ 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;
+ unsigned max_unitid;
-#if HT_CHAIN_END_UNITID_BASE < HT_CHAIN_UNITID_BASE
+#if HT_CHAIN_END_UNITID_BASE != 0x20
//let't record the device of last ht device, So we can set the Unitid to HT_CHAIN_END_UNITID_BASE
unsigned real_last_unitid;
uint8_t real_last_pos;
device_t real_last_dev;
+ unsigned end_used = 0;
#endif
/* Restore the hypertransport chain to it's unitialized state */
@@ -410,7 +410,7 @@ unsigned int hypertransport_scan_chain(struct bus *bus,
/* If present assign unitid to a hypertransport chain */
last_unitid = min_unitid -1;
- next_unitid = min_unitid;
+ max_unitid = next_unitid = min_unitid;
do {
uint8_t pos;
uint16_t flags;
@@ -478,26 +478,27 @@ unsigned int hypertransport_scan_chain(struct bus *bus,
flags &= ~0x1f; /* mask out base Unit ID */
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 HT_CHAIN_END_UNITID_BASE != 0x20
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;
+ if(next_unitid > (max_devfn>>3)) { // max_devfn will be (0x17<<3)|7 or (0x1f<<3)|7
+ if(!end_used) {
+ next_unitid = HT_CHAIN_END_UNITID_BASE;
+ end_used = 1;
+ } else {
+ goto out;
+ }
}
}
#endif
- flags |= temp_unitid & 0x1f;
+ flags |= next_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 += (temp_unitid << 3);
+ func->path.u.pci.devfn += (next_unitid << 3);
static_count = (func->path.u.pci.devfn >> 3)
- (dev->path.u.pci.devfn >> 3) + 1;
last_func = func;
@@ -508,20 +509,22 @@ unsigned int hypertransport_scan_chain(struct bus *bus,
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] = temp_unitid;
+ ht_unitid_base[ht_dev_num] = next_unitid;
ht_dev_num++;
-#if HT_CHAIN_END_UNITID_BASE < HT_CHAIN_UNITID_BASE
- if(offset_unitid) {
+#if HT_CHAIN_END_UNITID_BASE != 0x20
+ if (offset_unitid) {
real_last_pos = pos;
- real_last_unitid = temp_unitid;
+ real_last_unitid = next_unitid;
real_last_dev = dev;
}
#endif
+ next_unitid += count;
+ if (next_unitid > max_unitid) {
+ max_unitid = next_unitid;
+ }
/* Setup the hypetransport link */
bus->reset_needed |= ht_setup_link(&prev, dev, pos);
@@ -531,7 +534,8 @@ 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 <= 0x1f /*(max_devfn >> 3)*/ ));
+ } while (last_unitid != next_unitid);
+ out:
end_of_chain:
#if OPT_HT_LINK == 1
if(bus->reset_needed) {
@@ -542,8 +546,8 @@ 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>1) && (real_last_unitid != HT_CHAIN_END_UNITID_BASE) ) {
+#if HT_CHAIN_END_UNITID_BASE != 0x20
+ if(offset_unitid && (ht_dev_num>1) && (real_last_unitid != HT_CHAIN_END_UNITID_BASE) && !end_used) {
uint16_t flags;
int i;
device_t last_func = 0;
@@ -559,15 +563,18 @@ unsigned int hypertransport_scan_chain(struct bus *bus,
ht_unitid_base[ht_dev_num-1] = HT_CHAIN_END_UNITID_BASE; // update last one
- next_unitid = real_last_unitid;
+ printk_debug(" unitid: %04x --> %04x\n",
+ real_last_unitid, HT_CHAIN_END_UNITID_BASE);
+
}
#endif
+ next_unitid = max_unitid;
- if (next_unitid > 0x1f) {
- next_unitid = 0x1f;
+ if (next_unitid > 0x20) {
+ next_unitid = 0x20;
}
- if( (bus->secondary == 0) && (next_unitid > 0x17)) {
- next_unitid = 0x17; /* avoid K8 on bus 0 */
+ if( (bus->secondary == 0) && (next_unitid > 0x18)) {
+ next_unitid = 0x18; /* avoid K8 on bus 0 */
}
/* Die if any leftover Static devices are are found.