On Wed, 2014-01-29 at 17:39 +0100, Alexander Graf wrote:
> static inline mfvtb(unsigned long)
> {
> #ifdef CONFIG_PPC_BOOK3S_64
>      return mfspr(SPRN_VTB);
> #else
>      BUG();
> #endif
> }
> 
> is a lot easier to read and get right. But reg.h is Ben's call.

Agreed.

> Also could you please give me a pointer to the specification for it? I 
> tried to look up vtb in the 2.06 ISA and couldn't find it. Is it a CPU 
> specific register?


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