Re: [Linux-ia64] Re: [PATCH] head.S fix for unusual load addrs

Jack Steiner
2003-05-10T02:39:54Z

>
> >>>>> On Fri, 9 May 2003 15:02:47 -0500 (CDT), Jack Steiner <steiner@sgi.com> said:
>
> >> Would there be a downside to this on SGI's machines?
>
> Jack> I dont see any significant problems. It actually seems easy.
>
> Good.
>
> Jack> I think we still need to use __tpa() for addresses assigned by
> Jack> the loader. The standard __pa() macros wont work in region 5.
>
> That's why I don't mind: nobody can use __pa() on region 5 anyhow, so
> using something different (page table walk or __tpa()) is OK. I was
> real uneasy with having a "magic" address range inside region 7, where
> __pa() wouldn't work. But in region 5, no problem.
>
> It might be good to call __tpa() something different: it's too close
> to __pa() and the difference may easily be overlooked. For example,
> ia64_tpa() would make it obvious that we're talking about an ia64
> instruction.

Seems reasonable.....

>
> --david
>
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--
Thanks

Jack Steiner (651-683-5302) (vnet 233-5302) steiner@sgi.com