Re: Yosemite/440EP why are readl()/ioread32() setup to readlittle-endian?

On Wed, Feb 01, 2006 at 06:54:09PM -0600, Kumar Gala wrote:

On Wed, 1 Feb 2006, Peter Korsgaard wrote:

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"Matt" == Matt Porter [off-list ref] writes:

 Matt> read*/write* and ioread*/iowrite* generate outbound little
 Matt> endian cycles on ALL arches, period.  They are intended
 Matt> only for PCI use and have generic names only because of
 Matt> the assumption that "all the world is a PC".

What is the preferred way of accessing non-PCI devices then? Direct
pointer access?

No direct pointer access is bad. On PPC You can use
in_be{8,16,32}/out_be{8,16,32}

Ack. Also, it should be pointed out that there are countless
examples of PPC drivers where this is done properly. 4xx, 83xx,
85xx, etc. on-chip peripherals all do this since they are
naturally BE registers.

-Matt