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From: szg98@mail.zhongxing.com
To: raphael.bossek@solutions4linux.de
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: Cachable / Non-cachable memory
Date: Fri, 28 Jan 2000 19:13:34 +0800	[thread overview]
Message-ID: <48256874.003CDBD5.00@mail.zhongxing.com> (raw)

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In arch/ppc/mm/init.c,
the mpc8xx-linux code use map_page(v,p,flags),
to set one memory page to some properities,like _NO_CACHE_PAGE,etc.





raphael.bossek@solutions4linux.de ÔÚ 2000-01-28 17:31:23

ÊÕ¼þÈË:   linuxppc-embedded@lists.linuxppc.org
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Ö÷Ì⣺    Cachable / Non-cachable memory





Hi,

how does Linux specify memory regions as cachable and non-
cachable? It is sometimes required to mark mapped memory
regions from devices as non-cachable by the MMU so the PowerPC
does not tune the write/read accesses.

Is there any function or sample driver code in the mpc8xx-linux
2.2.13 code ?

cu Raphael Bossek - http://www.solutions4linux.de/powerpc.html


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

             reply	other threads:[~2000-01-28 11:13 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2000-01-28 11:13 szg98 [this message]
  -- strict thread matches above, loose matches on Subject: below --
2000-01-28  9:31 Cachable / Non-cachable memory raphael.bossek
2000-01-29  4:36 ` Dan Malek

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