> with it. It's very simple. The IO port space is for ISA/PCMCIA and > PCI IO port regions. It is nothing more than that.
And on a lot of devices the LPC bus. > Plus, if you _have_ IO space support, you must have some MMIO region for > them to target - doing what many platforms have done to date and targetted > ISA IO address 0 at virtual address 0 is just not on because as soon as > you build a device driver which probes ISA addresses into your kernel, > you will oops. There shouldn't really be anything poking around that is modern - this is true of some PC stuff too. In general however if its because you have a window partly mapped you could just catch the exception and load 0xFF for reads (and probably whine with a backtrace so you know who to moan at). Alan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
