arm: lib: Import __do_div64 from Linux
authorMarek Vasut <marex@denx.de>
Thu, 26 May 2016 16:01:42 +0000 (18:01 +0200)
committerTom Rini <trini@konsulko.com>
Fri, 3 Jun 2016 01:21:45 +0000 (21:21 -0400)
commit7b9f9c5d3bae666359143cf5a681f90e998b5a80
treee0cff1ba77438f5a10bced837ceffd61f7ae0a0a
parente64d75948446b14ff817c10ae5a65c84b1d24ba7
arm: lib: Import __do_div64 from Linux

Import __do_div64 from Linux 4.4.6 , commit 0d1912303e54ed1b2a371be0bba51c384dd57326
on arm32. This function is for some toolchains, which generate _udivmoddi4()
for 64 bit division.

Since we do not support stack unwinding, instead of importing the whole
asm/unwind.h and all the baggage, this patch defines empty UNWIND() macro.

This patch also defines CONFIG_THUMB2_KERNEL and CONFIG_ARM_ASM_UNIFIED
which is necessary for correct build of these files both in ARM and
Thumb mode, just like Linux does.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
arch/arm/lib/Makefile
arch/arm/lib/div64.S [new file with mode: 0644]