Messages in this thread | | | From | Benjamin Herrenschmidt <> | Subject | Re: The IO problem on multiple PCI busses | Date | Sat, 3 Mar 2001 18:28:08 +0100 |
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>I/O is not supposed to be fast, that's what MMIO is for. :) Just do > >void outb (u8 val, u16 addr) >{ > void *addr = ioremap (ISA_IO_BASE + addr); > if (addr) { > writeb (val, addr); > iounmap (addr); > } >} > >You can map and unmap for each call :) Ugly and slow, but hey, it's >I/O...
Well, that would really suck ;) And I don't think it would be necessary as we can probably limit each IO bus to 64k without much problem, and have them permanently ioremap'ed.
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