[U-Boot] standalone application for ppc internal registers access

[U-Boot] standalone application for ppc internal registers access

[eija_flight]

Hello,

I am using GCC inline assembly in standalone applications to access my cpu
(ppc) internal registers. And it seems some of the registers were needed by
U-boot to run, because when I am accessing some of these registers via
standalone applications, the board will go reset or hangs.

Is there any method to avoid this reset/hangs matter and peacefully back to
U-boot after exiting the standalone applications? because I need to use each
of registers, respectively. 

Best regards,
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[U-Boot] standalone application for ppc internal registers access

[Detlev Zundel]

Hi eija_flight,

> I am using GCC inline assembly in standalone applications to access my cpu
> (ppc) internal registers. And it seems some of the registers were needed by
> U-boot to run, because when I am accessing some of these registers via
> standalone applications, the board will go reset or hangs.
>
> Is there any method to avoid this reset/hangs matter and peacefully back to
> U-boot after exiting the standalone applications? because I need to use each
> of registers, respectively. 

There once was the extraordinary idea of saving registers before usage
and restoring them on exit.

Cheers
  Detlev

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