Re: [RFC][Patch] IBM Real-Time "SMI Free" mode driver -v4

Arnd Bergmann
2010-09-24T20:40:46Z

On Friday 24 September 2010 20:23:27 Vernon Mauery wrote:
> No, inb/outb have address as as unsigned long, which would explain why
> 0x40000 works with PIO. When doing inb/outb via the ioread/iowrite
> macros, the port value is the address (minus the offset) masked off to
> PIO_MASK, which is 16 bits on x86.

What I meant is that the inb/outb *instructions* only take a 16 bit
argument, not the kernel functions. You should really try to find
out what is going on there.

Arnd