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 that 4 cores.
Signed-off-by: Zheng Bao <[email protected]> Index: src/northbridge/amd/amdht/h3ncmn.c =================================================================== --- src/northbridge/amd/amdht/h3ncmn.c (revision 5679) +++ src/northbridge/amd/amdht/h3ncmn.c (working copy) @@ -555,16 +555,17 @@ 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); + /* bit[15,13,12] composes the cores */ /* Support Downcoring */ - cores = temp + 1; + cores = ((temp & 8) >> 1) + (temp & 3) + 1; AmdPCIReadBits (MAKE_SBDFO(makePCISegmentFromNode(node), makePCIBusFromNode(node), makePCIDeviceFromNode(node),
amd_fam10_calculate_cores.patch
Description: amd_fam10_calculate_cores.patch
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