From: Brian Gerst <bgerst@didntduck.org>
To: Jason Yan <jasonyanjk@yahoo.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: initialize page tables -- Re: paging question
Date: Wed, 20 Feb 2002 15:30:36 -0500 [thread overview]
Message-ID: <3C74076C.C2606C95@didntduck.org> (raw)
In-Reply-To: <20020220195513.EIBW1236.tomts21-srv.bellnexxia.net@abc337>
Jason Yan wrote:
>
> Thank you Dick
>
> Oops, I use a wrong subject, what I want to ask is how the pg0 be initialized
>
> in head.S,
>
> 395 .org 0x2000
> 396 ENTRY(pg0)
>
> so $pg0-__PAGE_OFFSET = 0x2000 - 0xC0000000 = 40002000, how comes bff00000 ?
That's offset 0x2000 from the beginning of head.o, which is at virtual
address 0xc0100000, meaning the final value of pg0 is 0xc0102000.
Subtract __PAGE_OFFSET and you get physical address 0x00102000.
--
Brian Gerst
next prev parent reply other threads:[~2002-02-20 20:31 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-20 22:54 Jason Yan
2002-02-20 20:29 ` Richard B. Johnson
2002-02-20 20:30 ` Brian Gerst [this message]
2002-02-21 0:36 Jason Yan
2002-02-20 21:49 ` initialize " Brian Gerst
2002-02-21 1:13 Jason Yan
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