I'm working on getting a MPC885 to interface with an onboard CPLD. I've successfully talked to the CPLD from our diagnostic application and I know that it works at the locations that I specified in the IMMR. I know that when linux loads that the IMMR still has the settings. However, when I try to do a read from the address I get the following error:
Oops: kernel access of bad area, sig: 11 NIP: C00BDED8 XER: 8000FF40 LR: C00BDCE0 SP: C1C81E30 REGS: c1c81d80 TRAP: 0300 MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11 DAR: F4000002, DSISR: 00000129 TASK = c1c80000[19] 'acc2test' Last syscall: 54 last math 00000000 last altivec 00000000 GPR00: 00000001 C1C81E30 C1C80000 FFFFFFFA C1C81E38 20004C0A 7FFFFE6C 3000B8A8 GPR08: 10000560 F4000002 00000001 00000000 538D6C93 10018688 00000000 40000000 GPR16: 00000000 00000000 00000001 00000000 00009032 01C81E80 00000000 C0002838 GPR24: C0002560 10000560 30024E9C 00000003 C015C198 C015C1C4 7FFFFE6C 20004C0A Call backtrace: C003D81C C0042AA4 C00025BC 100106E8 10000494 0FECED14 00000000 SIGSEGV It appears it is dying in the memory manager because of a bad page fault. Does anyone have any suggestion as how to fix this? Thanx, -Chris -------------- next part -------------- An HTML attachment was scrubbed... URL: http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20060126/febfa50e/attachment.htm
