ACPI update
I am working on updating ACPI to modern state and ACPI interrupt
routing. You can get the current code here [1]. It's going not bad but
I have some questions which I need answers for before moving on.
1) Locking. I have no idea which one should be used. There're 2
families of locking macros: ACPI_SERIAL_* and ACPI_LOCK_*
(see sys/dev/acpica5/acpivar.h). FreeBSD uses mtx_* for ACPI_LOCK
and sx_* for ACPI_SERIAL.
2) APIC. Current APIC code doesn't allow setting interrupts from other
subsystems and changing interrupts after boot, but this is required for
BUS_CONFIG_INTR to work.
[1] http://gitweb.dragonflybsd.org/~polachok/dragonfly.git/newacpi
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