[PATCH] ARM: OMAP4: sleep: byteswap data for big-endian

On Tue, Jan 14, 2014 at 11:35 AM, Victor Kamensky
[off-list ref] wrote:

When BE kernel is built Makefile does take of compiling code in BE
mode. I.e all proper flags like -mbig-endian and -Wl,--be8 will be set.

Agreed, and I assume you cannot instead switch to LE mode when
entering assembly assuming LE?

The reason I ask this is - most of our development is NOT in BE mode.
we will continue to manipulate and add assembly - AM335x, DRA7/OMAP5
etc.. and obviously not every code change will indulge in ensuring
right markers will be in place.

by ensuring readl_relaxed handles the variations, you have ensured
that I dont need to care about drivers other than to ensure they use
_relaxed variants. in the case of assembly, this does not seem long
term manageable.

quoted

is the idea of BE build meant to deal with having a single BE kernel
build work for all platforms (including LE ones)?

Sort of. The idea here to run BE image on OMAP4 chip, with
kernel that would deals with LE periphery correctly, but ARM
core run in BE with special kernel that compiled for BE case (i.e
CONFIG_CPU_BIG_ENDIAN is set).

I still dont get the usecase - other than "hey, we do this coz we can
do it!".. I mean, yep, it sounds great and all.. but 4 years down the
line, is this still going to work? is this going to be interesting
careabout? or we are just maintaining additional code for a passing
fancy or proof-of-concept?

Regards,
Nishanth Menon