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Re: Logical address to physical address translation

To: Arun Babu <arunbabu.n@xxxxxxxxx>
Subject: Re: Logical address to physical address translation
From: Mulyadi Santosa <mulyadi.santosa@xxxxxxxxx>
Date: Wed, 05 Sep 2007 01:08:23 +0700
Cc: Kernel Newbies <kernelnewbies@xxxxxxxxxxxx>
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Arun Babu wrote:

Hi I understand that to convert from logical to physical address space, we can use the macro __pa or virt_to_phys(), which applies for kernel memory space and not for user address space. (Am I correct?)

AFAIK yes..

Further, if I want to get the physical frame number for a given logical address, can someone please suggest me the way? [Is writing a code to walk through the page tables the only way? or can we make use of an already existing function/module?]

please check virt_to_page(kaddr) (include/asm-i386/page.h) and see if it meets your need.

regards,

Mulyadi


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References:
- Logical address to physical address translation
  - From: Arun Babu

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