PMD_PXNTABLE       20 arch/arm/include/asm/pgtable-2level-hwdef.h #define PMD_PXNTABLE		(_AT(pmdval_t, 1) << 2)     /* v7 */
PMD_PXNTABLE       26 arch/arm/include/asm/pgtable-3level-hwdef.h #define PMD_PXNTABLE		(_AT(pgdval_t, 1) << 59)