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From: Prashant Alange <prashant.alange@gmail.com>
To: linuxppc-embedded@ozlabs.org
Subject: How to disable dcache on MPC82xx platform
Date: Mon, 8 Aug 2005 19:30:49 -0700	[thread overview]
Message-ID: <6d145b42050808193058ee05b4@mail.gmail.com> (raw)

Hi all,

I am using alloc_bootmem_page() function to allocate memory required
in my custom ethernet driver . This driver reads buffer descriptors &
data from the memory allocated by bootmem page. This memory is updated
by CPM module. I am experiencing reliability issues with this driver.
It works fine for some time & then behaves abnormally. When driver
fails,  the values read from the allocated memory does not make any
sense. So I am thinking this could be because of cache since this
driver is working fine on non-os platform. I want to disable the
dcache for this memory region.

I am allocating about 700K of memory using alloc_bootmem_page() function.

Can anyone tell me how to do this?=20

I am running linux-2.4 on MCP8270 processor.

I tried flushing the dcache before accessing the memory but no luck.

Thanks for your time,
Prashant

             reply	other threads:[~2005-08-09  2:30 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-08-09  2:30 Prashant Alange [this message]
2005-08-09 14:37 ` How to disable dcache on MPC82xx platform Dan Malek
2005-08-09 14:57   ` Prashant Alange
2005-08-09 16:37     ` Dan Malek
2005-08-09 21:50       ` Prashant Alange
2005-08-09 22:28         ` Dan Malek

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