[PARISC] Add some defines for HugeTLB pages

Define some constants for HugeTLB pages, not that parisc-linux supports
it yet.

Signed-off-by: Helge Deller <deller@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/asm-parisc/page.h b/include/asm-parisc/page.h
index 44eae9f8274d..4a6752b0afed 100644
--- a/include/asm-parisc/page.h
+++ b/include/asm-parisc/page.h
@@ -135,6 +135,13 @@ extern int npmem_ranges;
 #define pfn_valid(pfn)          ((pfn) < max_mapnr)
 #endif /* CONFIG_DISCONTIGMEM */
 
+#ifdef CONFIG_HUGETLB_PAGE
+#define HPAGE_SHIFT             22      /* 4MB (is this fixed?) */
+#define HPAGE_SIZE              ((1UL) << HPAGE_SHIFT)
+#define HPAGE_MASK              (~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
+#endif
+
 #define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
 
 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)