1 files changed, 43 insertions, 0 deletions

diff --git a/arch/microblaze/include/asm/segment.h b/arch/microblaze/include/asm/segment.h
new file mode 100644
index 000000000000..7f5dcc56eea1
--- /dev/null
+++ b/arch/microblaze/include/asm/segment.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2008 Michal Simek
+ * Copyright (C) 2008 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _ASM_MICROBLAZE_SEGMENT_H
+#define _ASM_MICROBLAZE_SEGMENT_H
+
+#ifndef __ASSEMBLY__
+
+typedef struct {
+        unsigned long seg;
+} mm_segment_t;
+
+/*
+ * On Microblaze the fs value is actually the top of the corresponding
+ * address space.
+ *
+ * The fs value determines whether argument validity checking should be
+ * performed or not. If get_fs() == USER_DS, checking is performed, with
+ * get_fs() == KERNEL_DS, checking is bypassed.
+ *
+ * For historical reasons, these macros are grossly misnamed.
+ *
+ * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal.
+ */
+#  define KERNEL_DS     ((mm_segment_t){0})
+#  define USER_DS       KERNEL_DS
+
+# define get_ds()       (KERNEL_DS)
+# define get_fs()       (current_thread_info()->addr_limit)
+# define set_fs(x) \
+                do { current_thread_info()->addr_limit = (x); } while (0)
+
+# define segment_eq(a, b)               ((a).seg == (b).seg)
+
+# endif /* __ASSEMBLY__ */
+#endif /* _ASM_MICROBLAZE_SEGMENT_H */