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

hi Geert,

here i mean 'flush' is 'write-back only'

Regards,
Veerasena.
--- Geert Uytterhoeven <[email protected]> wrote:

> On Mon, 1 Oct 2007, veerasena reddy wrote:
> > In linux-2.6.18 (for MIPS24KE processor):
> > suppose if i want to do flush only then which API
> i
> > should use?
> 
> `flush' is fuzzy terminology: some people mean
> invalidate, others mean
> write back, others mean both.
> 
> > Similarly, if i want to do invalidation only which
> API
> > i should use?
> 
> dma_cache_inv().
> 
> > --- Geert Uytterhoeven <[email protected]>
> wrote:
> > 
> > > 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 -- [email protected]
> 
> 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
> 
> 



      Forgot the famous last words? Access your message archive online at http://in.messenger.yahoo.com/webmessengerpromo.php

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• References:
  • Re: linux cache routines for Write-back cache policy on MIPS24KE
    • From: Geert Uytterhoeven <[email protected]>

• Prev by Date: Re: [PATCH 4/5] writeback: remove pages_skipped accounting in __block_write_full_page()
• Next by Date: Re: [Question] How to represent SYSTEM_RAM in kerenel/resouce.c
• Previous by thread: Re: linux cache routines for Write-back cache policy on MIPS24KE
• Next by thread: Re: linux cache routines for Write-back cache policy on MIPS24KE
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]