Handle multiple nodes #18
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SergiiDmytruk
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Apr 8, 2024
SergiiDmytruk
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- Revert change that made SKL work only on Fam 16h and up, so it can be used with Fam 15h or even older CPUs.
- Update configuration of DEV of each northbridge that's present.
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…ssors" This reverts commit 335c103. Without -march=btver2 SKL can be used on AMD 15h or earlier and now that SKL more than fits into 64KiB limit, no need for such options to save a bit of space. Signed-off-by: Sergii Dmytruk <[email protected]>
DEV is specific to a northbridge, so there are multiple of them on systems with several CPU sockets. 0x18 is the device number of the first one with the rest using successive numbers (0x19, 0x1A, etc.). Signed-off-by: Sergii Dmytruk <[email protected]>
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krystian-hebel
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Apr 17, 2024
miczyg1
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Apr 19, 2024
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| * There are only 5 bits (0x00..0x1f) for PCI slot number (see definition of | ||
| * PCI_DEVFN) and we start at 0x18 (DEV_PCI_DEVICE), so there is hard upper | ||
| * limit on how many nodes can exist. |
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FYI: There actually is a setting in AMD Family 10h/15h to remap those node devices to bus 0xfe and 0xff, giving a potential for up to 64 nodes: https://github.com/coreboot/coreboot/blob/4.11_branch/src/northbridge/amd/amdfam10/early_ht.c#L29
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