PHYS_MASK_SHIFT    74 arch/arm/include/asm/pgtable-3level-hwdef.h #define PHYS_MASK_SHIFT		(40)
PHYS_MASK_SHIFT   203 arch/arm64/include/asm/pgtable-hwdef.h #define PHYS_MASK_SHIFT		(CONFIG_ARM64_PA_BITS)