[U-Boot-Users] Memory Access Problem

[sudhakar rajashekhara]

Hi,

We have ported U-boot and Linux to a custom 8280
board. For this board, the LED base has been set at
0x2200A000. I am able to write to this base from
U-boot using mw command and control the LED display.
But if I try to access the same memory from Linux, the
kernel is raising an exception. I even tried to map
this memory area by calling ioremap in MMU_init but
the result was same. Do I have to do any other
configuration in the Linx kernel to access this memory
area? Following is the log:

regards,
Sudhakar.

=======================================================
Oops: kernel access of bad area, sig: 11

NIP: C0139034 XER: 00000000 LR: C0139024 SP: C05B9F90
REGS: c05b9ee0 TRAP: 0300
   Not tainted

MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11

DAR: 2200A000, DSISR: 22000000

TASK = c05b8000[1] 'swapper' Last syscall: -1

last math 00000000 last altivec 00000000

GPR00: FFFFFFFF C05B9F90 C05B8000 C0110000 00001032
00000001 00000001 00000000

GPR08: F0000088 2200A000 C012D417 C05B9EA0 C0170000
00000000 10000000 00000000
GPR24: 00000000 00000000 40000000 007FFF7E 007FFF00
00000000 C0170000 007FFEB0
Call backtrace:
=======================================================

__________________________________
Do you Yahoo!?
Yahoo! Mail SpamGuard - Read only the mail you want.
http://antispam.yahoo.com/tools