[U-Boot] [PATCH] ARM: Rework and correct barrier definitions

[york sun]

On 08/05/2016 05:57 PM, Tom Rini wrote:
> On Mon, Aug 01, 2016 at 06:54:53PM -0400, Tom Rini wrote:
>
>> As part of testing booting Linux kernels on Rockchip devices, it was
>> discovered by Ziyuan Xu and Sandy Patterson that we had multiple and for
>> some cases incomplete isb definitions.  This was causing a failure to
>> boot of the Linux kernel.
>>
>> In order to solve this problem as well as cover any corner cases that we
>> may also have had a number of changes are made in order to consolidate
>> things.  First, <asm/barriers.h> now becomes the source of isb/dsb/dmb
>> definitions.  This however introduces another complexity.  Due to
>> needing to build SPL for 32bit tegra with -march=armv4 we need to borrow
>> the __LINUX_ARM_ARCH__ logic from the Linux Kernel in a more complete
>> form.  Move this from arch/arm/lib/Makefile to arch/arm/Makefile and add
>> a comment about it.  Now that we can always know what the target CPU is
>> capable off we can get always do the correct thing for the barrier.  The
>> final part of this is that need to be consistent everywhere and call
>> isb()/dsb()/dmb() and NOT call ISB/DSB/DMB in some cases and the
>> function names in others.
>>
>> Reported-by: Ziyuan Xu <xzy.xu at rock-chips.com>
>> Reported-by: Sandy Patterson <apatterson at sightlogix.com>
>> Signed-off-by: Tom Rini <trini at konsulko.com>
>
> Applied to u-boot/master, thanks!
>

Tom,

Today I found ls2080ardb_nand is broken and git bisect points to this 
commit a78cd86. I am trying to pin point the root cause.

York