Building of arch/arm/plat-mxc/ssi-fiq.S failed w/ THUMB2 enabled?
u.kleine-koenig at pengutronix.de
Fri Dec 2 05:24:18 EST 2011
On Fri, Dec 02, 2011 at 06:01:08PM +0800, Eric Miao wrote:
> Hi Dave & Sascha,
> I checked the log of this file, found a THUMB2 related changes, yet
> I'm still having the failure below, can you help do a quick check?
the problem is that in Thumb most commands don't work with r8-r15
because there are only three bits used to encode them. This is
unfortunate as the other registers are not banked for FIQ.
The best possibility I see is to save some unbanked registers to the
banked registers on entry and restore them on exception exit.
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