Timothy Pearson (tpearson@raptorengineeringinc.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/12068
-gerrit
commit 3492997a5db594562c3fe838627dbc6231e244d2 Author: Timothy Pearson tpearson@raptorengineeringinc.com Date: Mon Sep 7 03:39:15 2015 -0500
nb/amd/amdfam10: Fix incorrect channel buffer count configuration
The secondary bus number set code incorrectly overwrote the link buffer settings in F0x[F4,D4,B4,94]. Constrain the secondary bus number set to the appropriate bits of the registers.
Change-Id: If70825449f298aa66f7f8b76dbd7367455a6deb1 Signed-off-by: Timothy Pearson tpearson@raptorengineeringinc.com --- src/northbridge/amd/amdfam10/northbridge.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/src/northbridge/amd/amdfam10/northbridge.c b/src/northbridge/amd/amdfam10/northbridge.c index 85cee13..c8bf8fa 100644 --- a/src/northbridge/amd/amdfam10/northbridge.c +++ b/src/northbridge/amd/amdfam10/northbridge.c @@ -184,17 +184,14 @@ static void ht_route_link(struct bus *link, scan_state mode) * not correctly configured */ busses = pci_read_config32(link->dev, link->cap + 0x14); - busses &= 0xff000000; + busses &= ~(0xff << 8); busses |= parent->secondary & 0xff; - if (mode == HT_ROUTE_CLOSE) { - busses |= 0xfeff << 8; - } else if (mode == HT_ROUTE_SCAN) { + if (mode == HT_ROUTE_CLOSE) + busses |= 0xff << 8; + else if (mode == HT_ROUTE_SCAN) busses |= ((u32) link->secondary & 0xff) << 8; - busses |= 0xfc << 16; - } else if (mode == HT_ROUTE_FINAL) { + else if (mode == HT_ROUTE_FINAL) busses |= ((u32) link->secondary & 0xff) << 8; - busses |= ((u32) link->subordinate & 0xff) << 16; - } pci_write_config32(link->dev, link->cap + 0x14, busses);
if (mode == HT_ROUTE_FINAL) {