Execution time different

[Arquer Stephane]

The cache is enabled in both configuration:
CCR = 0xF501800F	with Grmon
	0xF501003F	with Redboot

The difference is with the freeze on IT.


> -----Message d'origine-----
> De : Joel Sherrill [mailto:joel.sherrill at oarcorp.com] 
> Envoyé : lundi 7 avril 2008 17:04
> À : Arquer Stephane
> Cc : rtems-users at rtems.com
> Objet : Re: RE : Execution time different
> 
> 
> Arquer Stephane wrote:
> > How is it enabled ?
> > Is ir done by Trtems or by the bootloader ?
> >
> >   
> Depends on the BSP and configuration.
> If the boot ROM usually enables, it then the BSP
> developer might have trusted that setting.
> 
> I would guess that the best thing to do is
> read whatever register indicates it is enabled
> once you get to the first application.
> 
> --joel
> >   
> >> -----Message d'origine-----
> >> De : Joel Sherrill [mailto:joel.sherrill at oarcorp.com]
> >> Envoyé : vendredi 4 avril 2008 18:19
> >> À : Arquer Stephane
> >> Cc : rtems-users at rtems.com
> >> Objet : Re: Execution time different
> >>
> >>
> >> Arquer Stephane wrote:
> >>     
> >>> Hello,
> >>>
> >>> I use a leon2  cpu and I have two way to load the code.
> >>> The first one is grmon and the other is Redboot with a 
> binary file 
> >>> generated by sparc-rtems4.7-objcopy -O binary file.elf 
> file.bin. I 
> >>> don't have the same behaviour with the same code. With
> >>>       
> >> grmon, a calcul
> >>     
> >>> function last 120ms With redboot, this function last 340ms
> >>>
> >>> I check MCFG2 :
> >>> Grmon:    03801460
> >>> Redboot: B0801460
> >>>
> >>> And I modified it in grmon but the time is always 120ms.
> >>>
> >>> Does anyone know what is initialise by grmon which is not done by 
> >>> Redboot ?
> >>>
> >>>
> >>>       
> >> Is caching enabed in both configurations?
> >>
> >> --joel
> >>     
> >>> Thanks for help.
> >>>
> >>>
> >>> sa
> >>>
> >>> _______________________________________________
> >>> rtems-users mailing list
> >>> rtems-users at rtems.com 
> >>> http://rtems.rtems.org/mailman/listinfo/rtems-users
> >>>
> >>>       
> >> --
> >> Joel Sherrill, Ph.D.             Director of Research & Development
> >> joel.sherrill at OARcorp.com        On-Line Applications Research
> >> Ask me about RTEMS: a free RTOS  Huntsville AL 35805
> >>    Support Available             (256) 722-9985
> >>
> >>
> >>
> >>     
> > _______________________________________________
> > rtems-users mailing list
> > rtems-users at rtems.com 
> > http://rtems.rtems.org/mailman/listinfo/rtems-users
> >   
> 
> 
> -- 
> Joel Sherrill, Ph.D.             Director of Research & Development
> joel.sherrill at OARcorp.com        On-Line Applications Research
> Ask me about RTEMS: a free RTOS  Huntsville AL 35805
>    Support Available             (256) 722-9985
> 
> 
>