On Thu, Sep 06, 2018 at 03:03:16PM +0200, Arnd Bergmann wrote:

quoted

        INTCG_base = ioremap(mfcr("cr<31, 14>"), INTC_SIZE);

It that reliable? I remember a similar situation with some registers on ARM
that are usually identified through a special CPU register, but in some
cases the SoC integrator put the wrong address in there, so we need to
look up the address in DT anyway.

Yes, it's reliable. This interrupt is combined with CPU and not on AXI
or APB. Soc just give a hole in the address space and tell the CPU where
the address is with 20 wire-signals.

 Guo Ren