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authorKyösti Mälkki <kyosti.malkki@gmail.com>2015-02-23 00:34:26 +0200
committerKyösti Mälkki <kyosti.malkki@gmail.com>2015-06-05 10:18:05 +0200
commit0a3d4e4b03edd272e2025d7acb4d34357671f46b (patch)
tree3890e07873ab949341e2795a83a6a42265f0cefe /src/northbridge/amd/amdk8
parent3690727955683f0e9eecadac0d7cdc7276e66ade (diff)
AMD K8 fam10: Refactor HT link connection test
Change-Id: I1e935a6b848a59f7f2e58779bceea599032de9e3 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/8562 Tested-by: build bot (Jenkins) Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com> Reviewed-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Diffstat (limited to 'src/northbridge/amd/amdk8')
-rw-r--r--src/northbridge/amd/amdk8/northbridge.c37
1 files changed, 15 insertions, 22 deletions
diff --git a/src/northbridge/amd/amdk8/northbridge.c b/src/northbridge/amd/amdk8/northbridge.c
index 84c1144814..8d8e1ef5ea 100644
--- a/src/northbridge/amd/amdk8/northbridge.c
+++ b/src/northbridge/amd/amdk8/northbridge.c
@@ -79,23 +79,6 @@ static void f1_write_config32(unsigned reg, u32 value)
}
}
-static bool is_non_coherent_link(struct device *dev, struct bus *link)
-{
- u32 link_type;
- do {
- link_type = pci_read_config32(dev, link->cap + 0x18);
- } while (link_type & ConnectionPending);
-
- if (!(link_type & LinkConnected))
- return false;
-
- do {
- link_type = pci_read_config32(dev, link->cap + 0x18);
- } while (!(link_type & InitComplete));
-
- return !!(link_type & NonCoherent);
-}
-
typedef enum {
HT_ROUTE_CLOSE,
HT_ROUTE_SCAN,
@@ -143,10 +126,6 @@ static u32 amdk8_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool is_
u32 ht_unitid_base[4]; // here assume only 4 HT device on chain
u32 max_devfn;
- link->cap = 0x80 + (link->link_num * 0x20);
- if (!is_non_coherent_link(dev, link))
- return max;
-
/* See if there is an available configuration space mapping
* register in function 1.
*/
@@ -267,6 +246,17 @@ static void relocate_sb_ht_chain(void)
}
}
+static void trim_ht_chain(struct device *dev)
+{
+ struct bus *link;
+
+ /* Check for connected links. */
+ for (link = dev->link_list; link; link = link->next) {
+ link->cap = 0x80 + (link->link_num * 0x20);
+ link->ht_link_up = ht_is_non_coherent_link(link);
+ }
+}
+
static void amdk8_scan_chains(device_t dev)
{
unsigned nodeid;
@@ -278,9 +268,12 @@ static void amdk8_scan_chains(device_t dev)
if (nodeid == 0)
sblink = (pci_read_config32(dev, 0x64)>>8) & 3;
+ trim_ht_chain(dev);
+
for (link = dev->link_list; link; link = link->next) {
bool is_sblink = (nodeid == 0) && (link->link_num == sblink);
- max = amdk8_scan_chain(dev, nodeid, link, is_sblink, max);
+ if (link->ht_link_up)
+ max = amdk8_scan_chain(dev, nodeid, link, is_sblink, max);
}
dev->bus->subordinate = max;