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Date:   Fri, 7 Sep 2018 14:07:30 +0800
From:   Guo Ren <ren_guo@c-sky.com>
To:     Arnd Bergmann <arnd@arndb.de>
Cc:     Rob Herring <robh@kernel.org>,
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Subject: Re: [PATCH V3 22/26] dt-bindings: interrupt-controller: C-SKY SMP
 intc
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On Thu, Sep 06, 2018 at 03:03:16PM +0200, Arnd Bergmann wrote:
> >         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