drivers/char/hvc_* and /Documentation/powerpc/hvcs.txt
olof at lixom.net
Sat Jan 26 12:04:09 EST 2008
On Fri, Jan 25, 2008 at 04:39:27PM -0600, Timur Tabi wrote:
> I'm working on a console driver for the Freescale hypervisor. I notice a bunch
> of hvc_* files in the drivers/char directory. I also noticed
> My guess is that hvcs.txt talks about drivers/char/hvcs.c, which is a console
> driver specific to some IBM hypervisor. The hvc_*.c files are based on that
> code but they're more generic and allow people to write console drivers for
> other hypervisors easliy. Am I right?
Hvcs is the server-side driver in some environments. I.e. a hvc console
connects through the hypervisor to a hvcs in another partition.
> If so, does this mean that I can take hvc_beat.c, modify it to make Freescale
> hypervisor calls instead, and presto, I'm done?
Yep, pretty much. It's real easy to write a new backend to hvc, I've got
a couple for various bringup environments here as well.
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