On Wed, 26 Apr 2000, Naik, Uday wrote:
> I am using a new CPU ixp1200, which basically has the SA1100 core
> and some gizmos. I am creating a BSP for it. I have made all the
> changes and have got to the point where the file system needs to be
> mounted and thats where I get the ext2 file system error.
[...]
> Some details:
>
> Memory is contiguous and starts at 0xC0000000.
> Kernel version is 2.2.13.
OK... then it's certainly not discontigous memory problem.
> compiler is arm-linux-gcc (not egcs)
That's probably not a good idea with 2.2.13 kernels since those kernels
weren't gcc-2.95 aware. You better look at the latest 2.2.14 patches
instead. IMHO using a 2.2.x kernel isn't a good move at this time. You
really should consider 2.3.x instead.
> I am using PAGE_OFFSET as 0x20000000. I believe I have made all
> the changes needed for this. Using this low number is ok for me
> since I never expect to have hard disk storage. Also this allows
> me to have a 1-1 virt-phy mapping for most devices.
This is not a good idea because you'll squeeze your user-space address
space maybe too much. You better ensure the kernel behave correctly with
the standard PAGE_OFFSET before fooling around with that. And what's the
real advantage of having a 1:1 mapping for IO?
Nicolas
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