constify struct cfattach

correct size argument to free(9)

ok kettenis@

Do the NULL -> cpu_info_primary conversion in the interrupt controller
drivers instead of the "midlayer". I had missed a couple of places in
the midlayer and instead of fixing this in several places

Do the NULL -> cpu_info_primary conversion in the interrupt controller
drivers instead of the "midlayer". I had missed a couple of places in
the midlayer and instead of fixing this in several places it is better
to do it in the functions that get invoked in the end.

show more ...

Correctly pass the "struct cpu_info" pointer along when establishing
interrupts. This fixes IPIs on machines with certain (newer?) OPAL
firmware. It also allows implementing pci_intr_establish_cpu(

Correctly pass the "struct cpu_info" pointer along when establishing
interrupts. This fixes IPIs on machines with certain (newer?) OPAL
firmware. It also allows implementing pci_intr_establish_cpu(9), which
is needed for distributing interrupt handlers across CPUs.

tested by gkoehler@

show more ...

Add xicp(4), a driver for the interrupt control presenter hardware found
on POWER8 CPUs.