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-rw-r--r--include/asm-i386/pgtable-3level-defs.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/asm-i386/pgtable-3level-defs.h b/include/asm-i386/pgtable-3level-defs.h
new file mode 100644
index 000000000000..eb3a1ea88671
--- /dev/null
+++ b/include/asm-i386/pgtable-3level-defs.h
@@ -0,0 +1,22 @@
+#ifndef _I386_PGTABLE_3LEVEL_DEFS_H
+#define _I386_PGTABLE_3LEVEL_DEFS_H
+
+/*
+ * PGDIR_SHIFT determines what a top-level page table entry can map
+ */
+#define PGDIR_SHIFT 30
+#define PTRS_PER_PGD 4
+
+/*
+ * PMD_SHIFT determines the size of the area a middle-level
+ * page table can map
+ */
+#define PMD_SHIFT 21
+#define PTRS_PER_PMD 512
+
+/*
+ * entries per page directory level
+ */
+#define PTRS_PER_PTE 512
+
+#endif /* _I386_PGTABLE_3LEVEL_DEFS_H */