Maximum bootable kernel size in current ARM linux
Alexander Clouter
alex at digriz.org.uk
Wed Sep 15 18:02:29 EDT 2010
Bruce M. Penrod <bmpenrod at endruntechnologies.com> wrote:
>
> U-Boot loads the zImage at 0x800000. Yesterday I added features back
> into the kernel and am up to 4600 * 1024 with no issues. So definitely
> not a hard limit at 4MB. It takes quite a while to compile on the
> OpenRD, so it may take a while for me to discover the magic combination
> that doesn't work. I removed a LOT of stuff, and I'd rather add it back
> in gradually to get an idea whether it is a size issue or some bad other
> thing with a combination of options.
>
Cross compiling is dead easy, if you are a Debian user (*always* use
'lenny' for emdebian, even if you are locally using 'squeeze' or 'sid'):
----
# cat <<EOF > /etc/apt/sources.list.d/emdebian.list
deb http://www.emdebian.org/debian/ lenny main
EOF
# aptitude update
# aptitude install gcc-4.3-arm-linux-gnueabi libc6-dev-armel-cross
----
Then when cross compiling you can use the shell alias:
----
alias amake="ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- make"
----
Then inside the Linux kernel directory just type 'amake menuconfig;
amake'...much faster.
If you are not using Debian (why not? :) then you can use buildroot if
your distro does not come with cross-compiling tools. On my website I
have a page describing the process for a MIPS platform, if you need any
help do ask:
http://www.digriz.org.uk/wag54g
Cheers
--
Alexander Clouter
.sigmonster says: It's not the inital skirt length, it's the upcreep.
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