[U-Boot] [PATCH v2 03/23] armv8: add lowlevel_init.S

[André Przywara]

On 05/12/16 06:26, Simon Glass wrote:
> Hi Andre,
> 
> On 4 December 2016 at 18:52, Andre Przywara <andre.przywara at arm.com> wrote:
>> For boards that call s_init() when the SPL runs, we are expected to
>> setup an early stack before calling this C function.
>> Implement the proper AArch64 version of this based on the ARMv7 code.
>> This allows sunxi boards to setup the basic peripherals even on with a
>> 64-bit SPL.
>>
>> Signed-off-by: Andre Przywara <andre.przywara at arm.com>
>> ---
>>  arch/arm/cpu/armv8/Makefile        |  1 +
>>  arch/arm/cpu/armv8/lowlevel_init.S | 44 ++++++++++++++++++++++++++++++++++++++
>>  2 files changed, 45 insertions(+)
>>  create mode 100644 arch/arm/cpu/armv8/lowlevel_init.S
> 
> Is this actually needed / used for anything?

All sunxi boards need to call s_init() in mach-sunxi/board.c.
But I gave this a closer look:
Indeed I believe we don't need lowlevel_init.S and the early call to
s_init(). We can just follow the recommendation in lowlevel_init.S and
move that code to board_init_f().
I have a small series that reworks this, but this would affect all sunxi
boards so should be considered separately.

Are you OK if we go ahead with this solution here for now, as it creates
the least churn?

Cheers,
Andre.