From: Kumar Gala <galak@kernel.crashing.org>
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org, paulus@samba.org
Subject: Re: [PATCH] powerpc: Fix PowerPC 750CL CPU features
Date: Thu, 12 Apr 2007 12:06:02 -0500 [thread overview]
Message-ID: <2830816F-F1C5-450C-BA68-287D8C312561@kernel.crashing.org> (raw)
In-Reply-To: <aeef7937e978aec33074251c48dca389@kernel.crashing.org>
On Apr 12, 2007, at 11:41 AM, Segher Boessenkool wrote:
>> PowerPC 750CL has high BATs. The patch below sets cpu_features to
>> match that.
>> Without it, the original firmware mappings in the high BATs aren't
>> cleared
>> which can cause "odd" address translations to occur.
>
>> - .cpu_features = CPU_FTRS_750,
>> + .cpu_features = CPU_FTRS_750GX,
>
> The difference between these two is
>
> #define CPU_FTRS_750GX (CPU_FTR_DUAL_PLL_750FX |
> CPU_FTR_HAS_HIGH_BATS)
> #define CPU_FTRS_750 (CPU_FTR_COMMON)
>
> 750GX excludes COMMON, which seems like a bug. With
> your change, 750CL uses DUAL_PLL_750FX; does it actually
> have that feature?
I agree the 750GX should include COMMON, we probably don't notice
since its never in a SMP system.
- k
next prev parent reply other threads:[~2007-04-12 17:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-12 12:49 [PATCH] powerpc: Fix PowerPC 750CL CPU features Josh Boyer
2007-04-12 13:49 ` Milton Miller
2007-04-12 13:53 ` Josh Boyer
2007-04-12 16:41 ` Segher Boessenkool
2007-04-12 17:06 ` Kumar Gala [this message]
2007-04-12 17:11 ` Josh Boyer
2007-04-12 17:10 ` Josh Boyer
2007-04-12 19:24 ` Segher Boessenkool
2007-04-13 2:28 ` Benjamin Herrenschmidt
2007-04-13 10:52 ` Josh Boyer
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