On Sun, Nov 19, 2000 at 03:33:46PM +0100, Erwin Rol wrote:
> Hello all,
>
> after searcing the XFree 4.0.1 sources i found the following piece of
> code in /xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_video.c
> (and simmulair for other OS's)
> When i understand the working of RTAI(and RTLinux) correct the direct
> cli/sti functions are offlimit
> for anything but the actual RT-code. Did anybody ran into problems with
x86 architecture allows user code to do cli/sti if ioperm has been set right.
This only happens on certain, wierd, video devices and is x86 specific although
your code snipped seems to show that the Intel designers decided to carry this
really stupid idea into the ia64.
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