From 23ffe8b6904187ecc4860f71794e995bd123704a Mon Sep 17 00:00:00 2001 From: Zheng Bao Date: Thu, 5 Aug 2010 06:12:16 +0000 Subject: The number of cores is got by reading the bit 15,13,12 of [0,24,3,e8]. The bit 15 seems to be a new feature when CPU started to have more than 4 cores. Zheng Yes, this was add for revD. Marc Jones Signed-off-by: Zheng Bao Acked-by: Marc Jones git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5684 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1 --- src/northbridge/amd/amdht/h3ncmn.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'src/northbridge/amd/amdht/h3ncmn.c') diff --git a/src/northbridge/amd/amdht/h3ncmn.c b/src/northbridge/amd/amdht/h3ncmn.c index 5222e0f505..1fcb07d633 100644 --- a/src/northbridge/amd/amdht/h3ncmn.c +++ b/src/northbridge/amd/amdht/h3ncmn.c @@ -555,16 +555,17 @@ static u8 fam10GetNumCoresOnNode(u8 node, cNorthBridge *nb) u8 i; ASSERT((node < nb->maxNodes)); - /* Read CmpCap */ + /* Read CmpCap [2][1:0] */ AmdPCIReadBits(MAKE_SBDFO(makePCISegmentFromNode(node), makePCIBusFromNode(node), makePCIDeviceFromNode(node), CPU_NB_FUNC_03, REG_NB_CAPABILITY_3XE8), - 13, 12, &temp); + 15, 12, &temp); + /* bits[15,13,12] specify the cores */ /* Support Downcoring */ - cores = temp + 1; + cores = ((temp & 8) >> 1) + (temp & 3) + 1; AmdPCIReadBits (MAKE_SBDFO(makePCISegmentFromNode(node), makePCIBusFromNode(node), makePCIDeviceFromNode(node), -- cgit v1.2.3