diff options
| -rw-r--r-- | include/asm-ia64/pgtable.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/asm-ia64/pgtable.h b/include/asm-ia64/pgtable.h index 2ef449bc5b95..697924282272 100644 --- a/include/asm-ia64/pgtable.h +++ b/include/asm-ia64/pgtable.h @@ -550,6 +550,23 @@ do { \ #define __HAVE_ARCH_PTEP_SET_WRPROTECT #define __HAVE_ARCH_PTE_SAME #define __HAVE_ARCH_PGD_OFFSET_GATE + +/* + * Override for pgd_addr_end() to deal with the virtual address space holes + * in each region. Virtual address bits are used like this: + * +--------+------+--------+-----+-----+--------+ + * | pgdhi3 | rsvd | pgdlow | pmd | pte | offset | + * +--------+------+--------+-----+-----+--------+ + * The high bit of 'pgdlow' must be sign extended across the 'rsvd' bits. + */ +#define IA64_PGD_SIGNEXTEND (PGDIR_SIZE << (PAGE_SHIFT-7)) +#define pgd_addr_end(addr, end) \ +({ unsigned long __boundary = ((addr) + PGDIR_SIZE) & PGDIR_MASK; \ + if (__boundary & IA64_PGD_SIGNEXTEND) \ + __boundary |= (RGN_SIZE - 1) & ~(IA64_PGD_SIGNEXTEND-1);\ + (__boundary - 1 < (end) - 1)? __boundary: (end); \ +}) + #include <asm-generic/pgtable-nopud.h> #include <asm-generic/pgtable.h> |