About variable "IOPortBase"

[Michael Lorenz]

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Hello,

On Mar 26, 2008, at 22:56, belcon zhao wrote:

> Just find that Xorg compiled xf86EnableIO() of hw/xfree86/os- 
> support/linux/lnx_video.c. IOPortBase wasn't initialized in that  
> file. That's why IOPortBase is 0. So, it should be compiling  
> mistake. Did I do extra work while compile Xorg with mips?

I don't know about linux but what you need is:
- - figure out at which physical address your PCI host bridge puts IO  
space
- - mmap() it, on linux you'd probably use /dev/mem for that
- - set IOPortBase accordingly

Xorg probably doesn't know about your particular hardware and you  
didn't give any details either. As far as I can tell the problem  
isn't MIPS, it's accessing IO space on your machine. On MIPS that  
would be memory-mapped somewhere. I can't tell you where, you need   
to figure that out on your own or tell us what exactly you're dealing  
with.

have fun
Michael

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