From: Ralf Baechle <ralf@linux-mips.org>
To: Rishabh@soc-soft.com
Cc: linux-mips@linux-mips.org
Subject: Re: Memory Management HAndling
Date: Fri, 11 Mar 2005 15:58:23 +0000 [thread overview]
Message-ID: <20050311155823.GC5958@linux-mips.org> (raw)
In-Reply-To: <4BF47D56A0DD2346A1B8D622C5C5902C61E22B@soc-mail.soc-soft.com>
On Fri, Mar 11, 2005 at 10:55:43AM +0530, Rishabh@soc-soft.com wrote:
> I have been working on MMU of Linux Port of 2.4.20 kernel for MIPS Port.
You may want to change to a kernel that has less than 52 months worth of
bugs and security holes.
> I have found that MACROS like
>
> #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
> #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
> #define virt_to_page(kaddr) (mem_map + (__pa(kaddr) >> PAGE_SHIFT))
>
>
> These macros can handle memory pages in KSEG0. Any suggestions on how
> can they be changed for addressing memory present in HIGHMEM. Since VA
> will not be in linear relation with mem_map.
That's normal for highmem. These macros will only work for lowmem.
Ralf
prev parent reply other threads:[~2005-03-11 15:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-11 5:25 Memory Management HAndling Rishabh
2005-03-11 5:25 ` Rishabh
2005-03-11 13:36 ` Alan Cox
2005-03-11 15:59 ` Ralf Baechle
2005-03-11 17:06 ` Manish Lachwani
2005-03-11 17:22 ` Ralf Baechle
2005-03-11 15:58 ` Ralf Baechle [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20050311155823.GC5958@linux-mips.org \
--to=ralf@linux-mips.org \
--cc=Rishabh@soc-soft.com \
--cc=linux-mips@linux-mips.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox