Some issues with kernel 2.6 for MPC8260 target

[Steven Blakeslee]

I ported it to the Embedded Planet ep8260 board with FCC3, ep8248 board
with FCC1 and FCC2 and ep8280 with FCC2 and FCC3.  I had to make very
little, if anything, to get it to work.  I did not try 2.6.9.  I am
currently using 2.6.10-rc3 which I believe after the last merge is now
2.6.10.  I did practically nothing to get all of these to work. 

> -----Original Message-----
> From: Saso Kavcic [mailto:saso at activetools.si] 
> Sent: Wednesday, January 12, 2005 9:27 AM
> To: Steven Blakeslee
> Cc: linuxppc-embedded at ozlabs.org
> Subject: Re: Some issues with kernel 2.6 for MPC8260 target
> 
> 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 at ozlabs.org
> >>[mailto:linuxppc-embedded-bounces at 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 at ozlabs.org
> >>https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> >>
> >>    
> >>
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> >  
> >
> 
>