Re: I/O permissions for V86 tasks (Enhanced V86 Mode)?

Alan Cox (alan@lxorguk.ukuu.org.uk)
Fri, 17 Jul 1998 16:40:39 +0100 (BST)


> bitmap having a fixed size. Not having the Intel docs in front of me
> at the moment I can't remember whether that is enforced by the processor
> but I suspect that it is. All the stuff after the IO bitmap is purely

It is but....

> for Linux's benefit and not used by the processor. Now fortunately if
> you can fix that then that's basically all there is to be fixed, but it
> seems like a biggie.

That depends - why not put the task structure at the other end, after all
the Linux bits. Now you can just extend it ?

> Besides, that will only work on Intel Pentiums and I guess you want to
> support 486 too, not to mention other manufacturers who may or may not
> have an EVM86 mode.

Later 486's have it

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.altern.org/andrebalsa/doc/lkml-faq.html