Re: Accessing shared physical memory
Alan Cox (alan@lxorguk.ukuu.org.uk)
Sat, 13 Nov 1999 01:34:14 +0000 (GMT)
> > > ptr = (short *) ioremap(0xd0000, 0x10000);
> > > for(;;)
> > > *ptr = 0xdead;
> > >
> > > Does not ever produce address 0xD... anything on the ISA bus. Therefore,
> >
> > Well I would guess the compiler optimised the above to
> >
> > while(1);
>
> if the ptr is/was declared volatile (it's not), surely it won't do
> this?
Then the cast would be to volatile short * ...
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