HelenOS sources

PMCR_X_FLAG       569 boot/arch/arm32/include/arch/cp15.h 	PMCR_X_FLAG = 1 << 4,
PMCR_X_FLAG       569 kernel/arch/arm32/include/arch/cp15.h 	PMCR_X_FLAG = 1 << 4,
PMCR_X_FLAG       569 uspace/lib/c/arch/arm32/include/libarch/cp15.h 	PMCR_X_FLAG = 1 << 4,
HelenOS homepage, sources at GitHub