Re: How do I access ioports from userspace?

Benjamin Herrenschmidt
2003-09-26T07:27:44Z

On Fri, 2003-09-26 at 07:26, Frank v Waveren wrote:
> On Thu, Sep 25, 2003 at 04:03:51PM -0700, Matthew Dharm wrote:
> > I'd like to be able to access some ioports to some custom hardware directly
> > from userspace, without creating a specialized kernel-level driver. Is
> > there a way to do that?
> Either use /dev/port, or if it's performance critical (but not performance
> critical enough to do in kernelspace), use ioperm/iopl and inb/outb.

Simple note: the above will work on x86 only...

Ben.