1 files changed, 9 insertions, 0 deletions

diff --git a/include/asm-x86/segment.h b/include/asm-x86/segment.h
index dfc8601c0892..646452ea9ea3 100644
--- a/include/asm-x86/segment.h
+++ b/include/asm-x86/segment.h
@@ -1,6 +1,15 @@
 #ifndef _ASM_X86_SEGMENT_H_
 #define _ASM_X86_SEGMENT_H_
 
+/* Constructor for a conventional segment GDT (or LDT) entry */
+/* This is a macro so it can be used in initializers */
+#define GDT_ENTRY(flags, base, limit)                   \
+        ((((base)  & 0xff000000ULL) << (56-24)) |       \
+         (((flags) & 0x0000f0ffULL) << 40) |            \
+         (((limit) & 0x000f0000ULL) << (48-16)) |       \
+         (((base)  & 0x00ffffffULL) << 16) |            \
+         (((limit) & 0x0000ffffULL)))
+
 /* Simple and small GDT entries for booting only */
 
 #define GDT_ENTRY_BOOT_CS       2