On Sun, Jan 22, 2017 at 01:06:47AM +0000, André Przywara wrote:
If we still needs it,
First: we definitely need this symbol, since it guards an implementation defined register and the Cortex-A53 does not define it. So we have to confine its use to the ARMv7 Cortex CPUs.
Ack.
x86 has a CONFIG_SMP symbol, that would be better to just leverage that.
Sounds tempting, but this seems to be a generic symbol that enables SMP support _within_ U-Boot, so it allows multiple cores to execute U-Boot code. This is clearly not what we want. Defining it seems to enable architecture specific and generic code paths in U-Boot.
I can rename this symbol if that helps to avoid confusion, for instance to read CONFIG_SUNXI_NO_ACTLR_SMP or to CONFIG_CPU_IS_NOT_SMP or CONFIG_CPU_IS_UP.
There's nothing sunxi specific about it, the last one is better imho.
Thanks! Maxime