Hello,
> If the kernel is compiled with gcc-3.3.6 the memory is detected
> correctly, however if the same kernel is compiled with gcc-3.4.6 only
> 8MB of the 32MB is detected. On the console 'Ignoring unrecognised
> tag..' is displayed. A part from the memory problem the board runs
> just fine. Below are two traces, one with all memory detected and one
> with only 8MB detected.
There are known problems when compiling our 2.4 kernel with gcc version
3.4 or newer. The recommended toolchain for compiling our 2.4 kernel is
available here
ftp://ftp.embeddedarm.com/ts-arm-linux-cd/cross-toolchains/crosstool-linux-gcc-3.3.4-glibc-2.3.2-0.28rc39.tar.bz2
> The reason to use the gcc-3.4.6 compiler is to get the math-cruncher
> running, there are patches available for the 3.4.6 compiler but not 3.3.6.
You should only need to compile your user space apps with a toolchain
that generate/uses crunch instrucionts/registers. I believe our
2.4 kernel will also need to be patched to enable the crunch
coprocessor as well as to save/restore the crunch registers on a context
switch.
--
Best Regards,
______________________________________________________________
Eddie Dawydiuk, Technologic Systems | voice: (480) 837-5200
16610 East Laser Drive Suite 10 | fax: (480) 837-5300
Fountain Hills, AZ 85268 | web: www.embeddedARM.com
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