I/O port access ???

[Gerd Knorr]

On Thu, 4 Feb 1999, Geert Uytterhoeven wrote:

> On Thu, 4 Feb 1999, Gerd Knorr wrote:
> > Is there some way to access the I/O ports, for example the VGA registers
> > of some graphics board (assuming the I/O ports are enabled in the PCI
> > config space) on ppc boxes?  How can I do that with Linux?  From kernel
> > space?  From user space?
> 
> You have to mmap() /dev/mem. Which address depends on the type of PPC box.
> You can find the correct addres in <asm/io.h> (*_ISA_IO_BASE).

Can I easily figure out the machine type (at runtime) somehow?  Parse 
/proc/cpuinfo?

   Gerd



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