[parisc-linux] to swap or not to swap

Matthew Wilcox willy@debian.org
Tue, 13 Nov 2001 14:25:45 +0000

On Tue, Nov 13, 2001 at 12:30:57AM -0800, Randolph Chung wrote:
> Can someone please explain this to me?
> It looks like some BE architectures define {read,write}[wl] to do LE swapping 
> (sparc, mipsel, ppc, etc) but others don't (s390, parisc). What is the 
> "correct" behavior?
> The inX/outX interfaces are all internal-swapped to LE.

depends on the PCI bridge and MMU whether you need to do bytesexswapping
in software or not.  see section 9 in the Dino ERS, page 61 for how PA
does this.

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