HelenOS sources

cp0_cause_ip_shift   50 kernel/arch/mips32/include/arch/cp0.h #define cp0_cause_ip_shift  8
cp0_cause_ip_shift   50 uspace/lib/c/arch/mips32/include/libarch/cp0.h #define cp0_cause_ip_shift  8
HelenOS homepage, sources at GitHub