On Mon, 30 Jun 2008, vishnuvaradan vishnuvaradan wrote:
> On Sun, Jun 29, 2008 at 9:54 PM, Marc Aurele La France <tsi@???>
> wrote:
>> On Sun, 29 Jun 2008, vishnuvaradan vishnuvaradan wrote:
>> Iam trying to integrate the xfree video driver for my PMC graphics card ..
>> while configuring and running the driver access some illegal memory area
>>> and
>>> iam geting oops kernel access bad area..
>> I need to debug the video driver.. ( reg its IOBASE,mem base etc)
>> I added printf inside the driver but it is not coming in var/log
>> Please give idea how to add some debug statements(with variable values)
>>> inside the video driver such that it will come in var/log ...???
>> The server closes stdout as part of its initialisation. You could use
>> stderr instead, but it is preferable to use the xf86Msg() family of
>> functions. These are documented in section 18.1 of the DESIGN document.
>> Still, I could not find where my video driver access bad area.
> As said earlier iam using the PMC graphics card along with a base board.
> while integrating the frame buffer driver for the graphics, based on
> our architecture
> FOR I/o READ/WRITE ACCESS I should use as
> outb(val,port) as outb(val, 0xF2000000+port)
> inb(val,port) as inb(val, 0xF2000000+ port)
> I have modified the direct I/O accessing in the xfree in my video driver
> ...
> Shall i need to modify the same in compiler.h inside
> programs/Xserver/hw/xfree86/common ??
> I suspect the problem is closely related to I/o issue only....
> I have attached the log file and the serial port messages for ur
> reference ..
> Please shed me some light to solve the issue..
For this architecture, compiler.h offsets all PCI I/O by ioBase, which in
turn is set by xf86EnableIO() in os-support/linux/lnx_video.c
Marc.
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