Messages in this thread | | | Date | Fri, 6 Jun 2014 10:02:42 +0100 (BST) | From | "Maciej W. Rozycki" <> | Subject | Re: [PATCH] drivers/char/mem.c: Add /dev/ioports, supporting 16-bit and 32-bit ports |
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On Wed, 4 Jun 2014, H. Peter Anvin wrote:
> > Also IIRC PCI-PCI bridges only forward port I/O space accesses > > within the low 64kB. > > Not true.
It must have been an implementation-specific constraint then (e.g. DECchip 21050), it's been a while since I looked into it. Thanks for straightening me out.
Maciej
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