Hello everyone,
I am working on porting linux to an arm720 chip that i am currently
working with, and i've run into a bit of a hitch. I can build kernel
images that work with (relatively) minimal problems (such as paging
issues) on an arm710 chip I am working with, but i'm having difficulty
with the 720 version. I added a mask in the ProcTypes list in head-armv.S
for the 720 processor id, and created a new set of processor functions
(arm720_processor_functions) to properly flush the TLB and the cache,
since the coprocessor registers are slightly different on the 720, but i'm
not really sure what else needs to be modified. Most of my kernel appears
to be working, I get up to a point where the kernel attempts to open
/dev/console (in init/main.c), at which point it falls flat on its face
with a file not found. My setup is a bit wierd, the 720 i am working with
is completely diskless, so the root file system is in a ramdisk, but i
know this works (or, at least, it works on the 710 system i have). The
root file system properly mounts.
I have traced execution all over trying to track down exactly what goes
on, but i can't exactly determine what difference between the two chips
would allow one kernel/ramdisk image to work fully on the 710 but cause it
to fail so late in the game on the 720. So right now i'm trying to gather
information of any sort, if anyone has experience with 710 and 720 chips
and provide any information or resources on casual or glaring distinctions
between the two, i'd be really appreciative. I'm sorry if i'm a little
vague on detail, i'm hesitant to release information regarding the
specifics of what i'm working with.
Any help would be greatly appreciated...Thanks in advance,
-Dan
unsubscribe: body of `unsubscribe linux-arm' to [EMAIL PROTECTED]
