From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "Wang, Baojun" <wangbj@lzu.edu.cn>
Cc: linuxppc-dev@ozlabs.org, rtlinuxgpl@upv.es,
Nicholas Mc Guire <der.herr@hofr.at>,
Miguel Masmano <mimastel@doctor.upv.es>,
linux-embedded@opentech.lzu.edu.cn
Subject: Re: ppc manual paging question
Date: Mon, 22 Oct 2007 14:50:52 +1000 [thread overview]
Message-ID: <1193028652.6745.57.camel@pasglop> (raw)
In-Reply-To: <200710221203.24157.wangbj@lzu.edu.cn>
On Mon, 2007-10-22 at 12:03 +0800, Wang, Baojun wrote:
> hi,
>
> I've got some qeustion about ppc(ppc44x) paging:
>
> how can I manually map a virtual address to a physical address through a
> specific pgd? How does ppc translate virt address to physical one? I think
> besides from tlb, the CPU will search the page table entries via the pgd, can
> I alter the pgd value to change the memory translation? under i386, it's very
> simple, we can just rewrite %%cr3, it even could invalidate all tlb entries
> automatically, how can I do this under ppc? I've tried rewrite
> current->mm->pgd and current->thread.pgdir, but sounds like it still not
> insufficiant, am I missing something vital?
What the heck are you trying to do ? Please explain and I'll tell you
how to do it properly :-)
Cheers,
Ben.
next prev parent reply other threads:[~2007-10-22 4:52 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200710221203.24157.wangbj@lzu.edu.cn>
2007-10-22 4:03 ` ppc manual paging question Wang, Baojun
2007-10-22 4:40 ` Nicholas Mc Guire
2007-10-22 4:50 ` Benjamin Herrenschmidt [this message]
[not found] ` <393029235.18964@lzu.edu.cn>
[not found] ` <200710221350.31688.wangbj@lzu.edu.cn>
2007-10-22 5:50 ` Wang, Baojun
2007-10-22 6:01 ` Benjamin Herrenschmidt
[not found] ` <393033430.04221@lzu.edu.cn>
[not found] ` <200710221417.43544.wangbj@lzu.edu.cn>
2007-10-22 6:17 ` Wang, Baojun
2007-10-22 7:53 ` [Rtlinuxgpl] " Nicholas Mc Guire
2007-10-22 7:34 ` Benjamin Herrenschmidt
[not found] ` <393039004.29574@lzu.edu.cn>
[not found] ` <200710221542.10592.wangbj@lzu.edu.cn>
2007-10-22 7:42 ` Wang, Baojun
2007-10-22 8:04 ` Benjamin Herrenschmidt
[not found] ` <393040796.08064@lzu.edu.cn>
[not found] ` <200710261750.54221.wangbj@lzu.edu.cn>
2007-10-26 9:50 ` Wang, Baojun
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