From: Olof Johansson <olof@lixom.net>
To: Timur Tabi <timur@freescale.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: drivers/char/hvc_* and /Documentation/powerpc/hvcs.txt
Date: Fri, 25 Jan 2008 19:04:09 -0600 [thread overview]
Message-ID: <20080126010409.GA25717@lixom.net> (raw)
In-Reply-To: <479A651F.2070109@freescale.com>
On Fri, Jan 25, 2008 at 04:39:27PM -0600, Timur Tabi wrote:
> Hi,
>
> 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
> /Documentation/powerpc/hvcs.txt.
>
> 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.
-Olof
next prev parent reply other threads:[~2008-01-26 0:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-25 22:39 drivers/char/hvc_* and /Documentation/powerpc/hvcs.txt Timur Tabi
2008-01-26 1:04 ` Olof Johansson [this message]
2008-02-06 23:16 ` Timur Tabi
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