[Evolves!] Why does one "stw" fail with address translation disabled in PPC405EP?

[Zhou Rui]

> Paul spotted today that you are actually trying to use __pa() on
> addresses returned from vmalloc, that will not work. Those are virtual
> addresses in a non-linear mapping, _pa() only works on the linear
> mapping.
> 
> Ben.

Oh, do you mean the addresses vmalloc() returns are non-linear mapping?
So if I use vmalloc(), how to translate the virtual addresses to
physical ones?
And does kmalloc() return addresses linear mapping?

Thank you!

Best Wishes

Zhou Rui
2008-09-01

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