BITS_PER_PTE       77 include/asm-parisc/pgtable.h #define PTRS_PER_PTE    (1UL << BITS_PER_PTE)
BITS_PER_PTE       82 include/asm-parisc/pgtable.h #define PMD_SHIFT       (PLD_SHIFT + BITS_PER_PTE)