CVSROOT: /cvs
Module name: src
Changes by: m...@cvs.openbsd.org 2012/05/17 13:46:52
Modified files:
sys/arch/sgi/gio: gio.c giovar.h
Log message:
Yet another rework of the crucial gio_id() function responsible for correctly
recognizing a GIO device or an id-less frame buffer in a GIO slot.
Turns out that GIO32 devices (at least those with a 32-bit ID register, but
likely all of them) do NOT like accesses to the minimal GIO register area
NOT done on 32-bit boundaries. While frame buffers won't mind, especially
if their slots are pipelined.
This makes it a lot easier to tell them apart.
While there, split gio_intr_establish() into gio_intr_map(), which will return
a logical interrupt number out of a GIO slot number, and gio_intr_establish(),
which will now expect a logical interrupt number, instead of a logical slot
number. These two functions are still unused, but upcoming changes depend on
this work. (Yes, I'm too lazy to make two commits for this tonite)
