[S390] System z large page support.

[linux-2.6-omap-h63xx.git] / include / asm-s390 / pgtable.h

diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h
index f8347ce9c5a124b58cfb311a68021eaf5437c7a2..fd336f2e2a7a7cece82e728f59238d74e74e0c7a 100644 (file)
--- a/include/asm-s390/pgtable.h
+++ b/include/asm-s390/pgtable.h
@@ -233,6 +233,15 @@ extern char empty_zero_page[PAGE_SIZE];
 #define _PAGE_TYPE_EX_RO       0x202
 #define _PAGE_TYPE_EX_RW       0x002
 
+/*
+ * Only four types for huge pages, using the invalid bit and protection bit
+ * of a segment table entry.
+ */
+#define _HPAGE_TYPE_EMPTY      0x020   /* _SEGMENT_ENTRY_INV */
+#define _HPAGE_TYPE_NONE       0x220
+#define _HPAGE_TYPE_RO         0x200   /* _SEGMENT_ENTRY_RO  */
+#define _HPAGE_TYPE_RW         0x000
+
 /*
  * PTE type bits are rather complicated. handle_pte_fault uses pte_present,
  * pte_none and pte_file to find out the pte type WITHOUT holding the page
@@ -325,6 +334,9 @@ extern char empty_zero_page[PAGE_SIZE];
 #define _SEGMENT_ENTRY         (0)
 #define _SEGMENT_ENTRY_EMPTY   (_SEGMENT_ENTRY_INV)
 
+#define _SEGMENT_ENTRY_LARGE   0x400   /* STE-format control, large page   */
+#define _SEGMENT_ENTRY_CO      0x100   /* change-recording override   */
+
 #endif /* __s390x__ */
 
 /*