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Message-ID: <452D1567.1050706@innova-card.com>
Date:	Wed, 11 Oct 2006 18:01:43 +0200
Reply-To: Franck <vagabon.xyz@gmail.com>
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To:	Atsushi Nemoto <anemo@mba.ocn.ne.jp>
CC:	vagabon.xyz@gmail.com, ralf@linux-mips.org, ths@networkno.de,
	linux-mips@linux-mips.org, fbuihuu@gmail.com
Subject: Re: [PATCH 1/5] Make __pa() uses CPHYSADDR() if really needed
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From:	Franck Bui-Huu <vagabon.xyz@gmail.com>
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Atsushi Nemoto wrote:
> Here's my understanding.
> 
> CPHYSADDR --- used to convert a CKSEG0 or CKSEG1 to a physical
> address.  Be carefull when use it in 64-bit kernel.
> 
> __pa() --- inverse of __va(), of course :-) used to convert a kernel
> linear logical address to a physycal address.
> 
> virt_to_phys() --- synonym of __pa() ?

Well in my understanding __pa() is used during bootmem init. It deals with
initialisation issues and ugliness and that's what CPHYSADDR() actually
does. virt_to_phys() is used once everything is correctly setup.

> __pa() is used in many place indirectly via virt_to_page().
> 

what about make virt_to_page() use virt_to_phys() instead ?

		Franck