Clock not running (was Re: RTEMS4.7 and its tool chain (Re: powerpc mvme5500 clock off by factor of 150))

[Joel Sherrill <joel@OARcorp.com>]

Till,

Could you please educate us on what the & does?  It looks like
there may be more to fix.  :(

--joel

Peter Dufault wrote:
> 
> On Mar 9, 2005, at 7:15 AM, Joel Sherrill <joel at OARcorp.com> wrote:
> 
>>
>> cpukit/score/cpu/powerpc/rtems/score/cpu.h has these:
>>
>> #define PPC_Set_decrementer( _clicks ) \
>>   do { \
>>     asm volatile( "mtdec %0" : : "r" ((_clicks)) ); \
>>   } while (0)
>>
>> #define PPC_Get_decrementer( _clicks ) \
>>     asm volatile( "mfdec  %0" : "=r" (_clicks) )
>>
>>
>> Note that there is no & in the get.  Even the get and set timebase
>> register don't have them.  Is this right?
>>
> 
> I had checked that they matched before.  It fixed my problem.  I don't 
> know if it is a gcc "feature" in 4.0 or what, and today I don't have 
> time to think about it.  I've been up since Till found that problem last 
> night getting my application running, and I'm planning to try things out 
> at the customer site in a few hours.
> 
> Again, Till gets my "Hero of the Day" award.
> 
> Peter
> 
> Peter Dufault
> HD Associates, Inc.
> 


-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel at OARcorp.com                 On-Line Applications Research
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