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Date: Mon, 11 Nov 2013 11:07:24 +0200
From: Aleksandr Rybalko <ray@freebsd.org>
To: John Wehle <john@feith.com>
Subject: Re: arm/183740: mutex on some arm hardware requires dcache enabled
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On Mon, 11 Nov 2013 06:40:01 GMT
John Wehle <john@feith.com> wrote:

> The following reply was made to PR arm/183740; it has been noted by GNATS.
> 
> From: John Wehle <john@feith.com>
> To: ganbold@gmail.com
> Cc: freebsd-gnats-submit@freebsd.org
> Subject: Re: arm/183740: mutex on some arm hardware requires dcache enabled
> Date: Mon, 11 Nov 2013 01:31:38 -0500 (EST)
> 
>  > What kind of Amlogic board you are working on?
>  
>  I'm currently using a Visson ATV-102 "Android TV Box" which has an
>  Amlogic aml8726-m3 SoC.  I have it to the point of attempting to
>  mount the root filesystem so it's probably time for me to write a
>  driver for the Amlogic MMC hardware.
>  
>  I also have a Ainol Elf 2 tablet which has an Amlogic aml8726-mx SoC
>  which I plan to work on next.
>  
>  Both chips are dual core Arm Cortex A9 processors.
>  
>  > As for the patch can you try to put it in initarm_late_init() of
>  > your board machdep code and try?
>  
>  Yep ... enabling the dcache in initarm_late_init takes care of the
>  mutex ldrex / strex problem.
>  
>  -- John
>  
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Cool!
Go-go-go John! :)

WBW
-- 
Aleksandr Rybalko <ray@freebsd.org>