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Re: linux cache routines for Write-back cache policy on MIPS24KE

To: veerasena reddy <veerasena_b@yahoo.co.in>
Subject: Re: linux cache routines for Write-back cache policy on MIPS24KE
From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Mon, 1 Oct 2007 11:23:05 +0200 (CEST)
Cc: linux-mips <linux-mips@linux-mips.org>, "linux-kernel.org" <linux-kernel@vger.kernel.org>
In-reply-to: <119374.35234.qm@web8401.mail.in.yahoo.com>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <119374.35234.qm@web8401.mail.in.yahoo.com>
Sender: linux-mips-bounce@linux-mips.org
On Mon, 1 Oct 2007, veerasena reddy wrote:
> I have ported Linux-2.6.18 kernel on MIPS24KE
> processor. I am using write back cache policy.
> 
> Could you please guide me under what cases the below
> cache API's are being used:
> - dma_cache_wback_inv() : Could you explain  what
> exactly this function does

It does both write back and invalidate.

> - dma_cache_wback() : This function write back the
> cache data to memory
> - dma_cache_inv  : This function invalidate the cache
> tags. so subsequent access will fetch from memory.

Note that 2.6.18 is old. The above functions are intended to be removed.

Gr{oetje,eeting}s,

                                                Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                                            -- Linus Torvalds

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