Hi,
I'm trying to add a interrupt handler. My board is based of taishan 440gx. I'm using external irq0. the moment i add the interrupt i get
Bus Fault @ 0x00000000, fixup 0x00000000 Machine check in kernel mode. Caused by (from msr): regs 0c21ec28 Unknown values in msr NIP: 00000000 XER: 20000000 LR: 0C345878 REGS: 0c21ec28 TRAP: 0200 DAR: 00000000 MSR: 00000000 EE: 0 PR: 0 FP: 0 ME: 0 IR/DR: 00
GPR00: 00000000 0C21ED18 7FFFFFFF 00000000 0E37EBDB 0C37EBDC 0C361D48 20600000 GPR08: 00000100 0C37EBDC 0C361D44 27BC86AE 0C21EC20 00200000 0C364F00 0C363000 GPR16: 00000000 00000001 00000000 00000001 00001000 0C21ED58 00000000 0C32519C GPR24: 0C325EC8 FFFFFFF7 0C34586C 00000017 0C362248 0C21EF2C 0C366538 80000000 Call backtrace: machine check
this happens in ppc4xx/interrupt.c function irq_install_handler the moment a call to mtdcr (uicer, mfdcr (uicer) | (0x80000000>> i));
FYI CONFIG_440 is set and so is CONFIG_4xx and this is not running in compatibility mode.
i checked and rechecked the polarity, trigger register setting they all seem to be correct.
Any pointers would be appreciated.
thanks !
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