Hi

quoted

well, their 'special DMA fancy stuff' ;) ), ATA, DDR, I2S, AC97 mainly.

ATA: OK as long as you don't enable DMA writes (*)

Are DMA Read supported ? ( I mean possible to just use DMA for the reads
? My application is about 95 % reads ;)
What's the performance impact ?

DDR: OK (use icecube_5200_DDR configuration in U-Boot); the LOWBOOT
    option is not working yet (we are working on this)

I2S: simultaneous reading and writing is impossible (*)
AC97: ditto

Ok, not a problem for me I only do audio out.
But just in case, if I do In and Out on different PSC, does this works ?

(*) to fix these issues we're waiting for a  bugfix  release  of  the
   BestComm CAPI which might become availabe by mid February.

Cool !

quoted

- I'd really like to run a 2.6 kernel on it. If it's not yet ported to

Forget it. Why would you want to  do  that?  Which  features  do  you
expect from 2.6 which are not available in 2.4?

Well things like *:
 -  Pluggable I/O Scheduler
 -  Kernel preemption
 -  Better IPSec / Encryption support
 -  udev stuff ( in fact userspace but may depend on some kernel
interface, have to check. Primarly done for the 2.6 AFAIK )
 -  Native ALSA

And also because when I start a new project I like to use "new" stuff ;)
That's were a majority of new nifty features are ...



(*) I'm not sure they are all only and 2.6 and not backported/already in
2.4, I have to check.

Our current stuff is on our CVS  server,  in  the  linuxppc_2_4_devel
tree.  As  far  as the 5200 is concerned this includes stuff that was
submitted but not yet added to the linux-2.4-mpc5xxx  tree  (but  Tom
promised to add our patches).

I've just downloaded it but ran into a problem when compiling the kernel
with the icecube default config.

In arch/ppc/boot/common/misc-simple.c :
 - the decompress_kernel routine is used before being defined/declared
 - the decompress_kernel defined there takes 3 args, the one used in
load_kernel func ( same file ), gives 4 args to it ...


Sylvain Munaut

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