HelenOS sources

PMCR_C_FLAG       571 boot/arch/arm32/include/arch/cp15.h 	PMCR_C_FLAG = 1 << 2,
PMCR_C_FLAG       571 kernel/arch/arm32/include/arch/cp15.h 	PMCR_C_FLAG = 1 << 2,
PMCR_C_FLAG       571 uspace/lib/c/arch/arm32/include/libarch/cp15.h 	PMCR_C_FLAG = 1 << 2,
HelenOS homepage, sources at GitHub