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From: Michael Ellerman <michael@ellerman.id.au>
To: Kumar Gala <kumar.gala@freescale.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [PATCH 15/16] powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED
Date: Tue, 16 Dec 2008 08:03:18 +1100	[thread overview]
Message-ID: <1229374998.8332.20.camel@localhost> (raw)
In-Reply-To: <8F38D1CB-D389-4065-A309-3126B6D482DB@freescale.com>

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On Mon, 2008-12-15 at 14:54 -0600, Kumar Gala wrote:
> >
> > #ifndef __ASSEMBLY__
> > +
> > +/*
> > + * Macro to mark a page protection value as "uncacheable".
> > + */
> > +
> > +#define _PAGE_CACHE_CTL	(_PAGE_COHERENT | _PAGE_COHERENT | _PAGE_COHERENT | \
> > + 			 _PAGE_WRITETHRU)
> 
> we like coherent so much we set it thrice?

That makes it really-really-really coherent.

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person

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  parent reply	other threads:[~2008-12-15 21:03 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-12-15  5:43 [PATCH 0/16] powerpc: Preliminary work to enable SMP BookE (v2) Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 1/16] powerpc: Fix bogus cache flushing on all 40x and BookE processors v2 Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 2/16] powerpc: Fix asm EMIT_BUG_ENTRY with !CONFIG_BUG Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 3/16] powerpc/4xx: Extended DCR support v2 Benjamin Herrenschmidt
2008-12-17 17:33   ` Josh Boyer
2008-12-15  5:44 ` [PATCH 4/16] powerpc/fsl-booke: Fix problem with _tlbil_va Benjamin Herrenschmidt
2008-12-15  6:59   ` Stephen Rothwell
2008-12-15  7:04     ` Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 5/16] powerpc/mm: Add local_flush_tlb_mm() to SW loaded TLB implementations Benjamin Herrenschmidt
2008-12-15 20:30   ` Kumar Gala
2008-12-15  5:44 ` [PATCH 6/16] powerpc/mm: Split mmu_context handling v3 Benjamin Herrenschmidt
2008-12-15 15:43   ` Arnd Bergmann
2008-12-15 20:20     ` Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 7/16] powerpc/mm: Rework context management for CPUs with no hash table v2 Benjamin Herrenschmidt
2008-12-17 21:30   ` Kumar Gala
2008-12-15  5:44 ` [PATCH 8/16] powerpc/mm: Rename tlb_32.c and tlb_64.c to tlb_hash32.c and tlb_hash64.c Benjamin Herrenschmidt
2008-12-15 20:36   ` Kumar Gala
2008-12-15 20:46     ` Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 9/16] powerpc/mm: Introduce MMU features v2 Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 10/16] powerpc/mm: Remove flush_HPTE() Benjamin Herrenschmidt
2008-12-15  5:44 ` [PATCH 11/16] powerpc/mm: Add SMP support to no-hash TLB handling v3 Benjamin Herrenschmidt
2008-12-15 20:19   ` Kumar Gala
2008-12-15 20:46     ` Benjamin Herrenschmidt
2008-12-15 20:57       ` Kumar Gala
2008-12-15 21:03         ` Benjamin Herrenschmidt
2008-12-15 21:10           ` Kumar Gala
2008-12-15 21:18             ` Benjamin Herrenschmidt
2008-12-15 22:19               ` Kumar Gala
2008-12-15 23:31                 ` Benjamin Herrenschmidt
2008-12-15  5:45 ` [PATCH 12/16] powerpc/mm: Split low level tlb invalidate for nohash processors Benjamin Herrenschmidt
2008-12-15  5:45 ` [PATCH 13/16] powerpc/44x: No need to mask MSR:CE, ME or DE in _tlbil_va on 440 Benjamin Herrenschmidt
2008-12-15 12:25   ` [PATCH 13/16] powerpc/44x: No need to mask MSR:CE,ME " Josh Boyer
2008-12-15  5:45 ` [PATCH 14/16] powerpc/mm: Runtime allocation of mmu context maps for nohash CPUs v2 Benjamin Herrenschmidt
2008-12-17 21:21   ` Kumar Gala
2008-12-15  5:45 ` [PATCH 15/16] powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED Benjamin Herrenschmidt
2008-12-15 20:54   ` Kumar Gala
2008-12-15 21:01     ` Benjamin Herrenschmidt
2008-12-15 21:08       ` Kumar Gala
2008-12-15 21:03     ` Michael Ellerman [this message]
2008-12-15 21:05       ` Benjamin Herrenschmidt
2008-12-15  5:45 ` [PATCH 16/16] powerpc/44x: 44x TLB doesn't need "Guarded" set for all pages Benjamin Herrenschmidt

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