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| /freebsd-10-stable/sys/ia64/pci/ | ||
| H A D | pci_cfgreg.c | diff 253560 Tue Jul 23 01:12:47 MDT 2013 marcel In pci_cfgregread() and pci_cfgregwrite(), multiplex the domain and bus number into the bus argument. The bus number occupies the least significant 8 bits. The PCI domain occupies the most significant 24 bits. On the Altix 350, the PCI domain is a required parameter, but changing the prototype of the pci_cfgreg*() functions to include a separate domain argument has wide-spread consequences across the supported architectures. We'd be changing a known interface. Multiplexing is an acceptable kluge to give us what we need with manageable impact. Note that the PCI bus number fits in 8 bits, so the multiplexing of the domain is a backward compatible change. |
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