Re: Some issues with kernel 2.6 for MPC8260 target

From: Hans Schillstrom <hans.schillstrom@pwav.com>
To: Saso Kavcic <saso@activetools.si>
Cc: Steven Blakeslee <BlakesleeS@embeddedplanet.com>,
	linuxppc-embedded@ozlabs.org
Subject: Re: Some issues with kernel 2.6 for MPC8260 target
Date: Wed, 12 Jan 2005 15:38:41 +0100	[thread overview]
Message-ID: <1105540720.7900.231.camel@hawk.allgon.net> (raw)
In-Reply-To: <41E533CB.6060208@activetools.si>

Hi,
I have 2.6.10 working on a mpc8250vr, the only thing that had to be done
was moving around the clock pins. The performace is good.

/Hans

On Wed, 2005-01-12 at 15:27, Saso Kavcic wrote:
> Hi Steven,
> 
> Have you noticed any improvements in 2.6.10. over 2.6.9? We were porting 
> 2.6.9 to a custom mpc8275vr
> board and we were able to get everything working except ethernet (fcc 
> enet). We did manage to get
> a few packets over it but it was all very slow, unstable and 
> unpredictable and it seemed that fcc enet
> driver doesn't work well in 2.6. Were you able to use fcc under 2.6.9?
> 
> Best Regards, Saso
> 
> Steven Blakeslee wrote:
> 
> >I would suggest going to the latest 2.6.10 kernel.  I have it running
> >with several ethernets running on all the 82xx processors. 
> >
> >  
> >
> >>-----Original Message-----
> >>From: linuxppc-embedded-bounces@ozlabs.org 
> >>[mailto:linuxppc-embedded-bounces@ozlabs.org] On Behalf Of 
> >>Vijay Padiyar
> >>Sent: Wednesday, January 12, 2005 5:37 AM
> >>To: LinuxPPC Support
> >>Subject: Some issues with kernel 2.6 for MPC8260 target
> >>
> >>Hi all
> >>
> >>I wish to discuss some strange issues that I faced with 
> >>respect to the Linux
> >>2.6.8 kernel (downloaded from kernel.org). Firstly, I wish to 
> >>know whether this has been known to work on an MPC8260 PowerPC target.
> >>
> >>Secondly, when I tried to compile the Linux kernel with my 
> >>toolchain (built with Dan Kegel's crosstool for the PowerPC 
> >>603e core, which is what my processor has), I got some errors 
> >>which I found to rather queer after investigation. Firstly, 
> >>let me state the errors that I got:
> >>
> >>------------------------------------------------------
> >>
> >>  LD      init/built-in.o
> >>  LD      .tmp_vmlinux1
> >>arch/ppc/8260_io/built-in.o(.text+0x103c): In function 
> >>`mii_queue_relink':
> >>arch/ppc/8260_io/fcc_enet.c:1254: undefined reference to 
> >>`schedule_task'
> >>arch/ppc/8260_io/built-in.o(.text+0x1074): In function 
> >>`mii_queue_config':
> >>arch/ppc/8260_io/fcc_enet.c:1263: undefined reference to 
> >>`schedule_task'
> >>
> >>------------------------------------------------------
> >>
> >>On further investigation, I find that 'schedule_task()' is 
> >>simply not defined anywhere in the 2.6.8 kernel sources. This 
> >>is quite wierd! However, it is defined in a file 'context.c' 
> >>(linux-src/kernel) in the 2.4.27 kernel sources, which we 
> >>were using earlier. How is it that a function is being called 
> >>but its definition has been removed from the sources?
> >>
> >>Another such example is with the structure 'tq_struct'. It is 
> >>referred to in the file 'fcc_enet.c' 
> >>(linux-src/arch/ppc/8260_io) but it's not defined anywhere! 
> >>Again, after checking in the 2.4.27 sources, I find that it's 
> >>defined in the file 'tqueue.h' (linux-src/include/linux)!
> >>
> >>A third thing is that the 2.4.27 kernel source file 'uart.c'
> >>(linux-src/arch/ppc/cpm2_io) is not present in the 
> >>corresponding folder in the 2.6.8 source 
> >>(linux-src/arch/ppc/8260_io). There is one 'uart.c' in the 
> >>folder '8xx_io', but it doesn't get compiled during the 
> >>kernel build process. Will my UART work correctly with this build?
> >>
> >>Can someone please tell me if there's some explanation for 
> >>this that I'm unaware of? Which would be the proper forum to 
> >>report this? Again I would like to ask: Has the 2.6.8 kernel 
> >>been tested successfully on the MPC8260 PowerPC platform?
> >>
> >>Lastly, where can I get the latest stable Linux kernel source 
> >>for the PowerPC platform?
> >>
> >>Regards
> >>
> >>Vijay Padiyar
> >>_______________________________________________
> >>Linuxppc-embedded mailing list
> >>Linuxppc-embedded@ozlabs.org
> >>https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> >>
> >>    
> >>
> >_______________________________________________
> >Linuxppc-embedded mailing list
> >Linuxppc-embedded@ozlabs.org
> >https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> >  
> >
> 
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