diff --git a/arch/nds32/include/asm/ptrace.h b/arch/nds32/include/asm/ptrace.h
new file mode 100644
index 0000000..4336083
--- /dev/null
+++ b/arch/nds32/include/asm/ptrace.h
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2011 Andes Technology Corporation
+ * Copyright (C) 2010 Shawn Lin (nobuhiro@andestech.com)
+ * Copyright (C) 2011 Macpaul Lin (macpaul@andestech.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_NDS_PTRACE_H
+#define __ASM_NDS_PTRACE_H
+
+#define USR_MODE	0x00
+#define SU_MODE		0x01
+#define HV_MODE		0x10
+#define MODE_MASK	(0x03<<3)
+#define GIE_BIT		0x01
+
+#ifndef __ASSEMBLY__
+
+/* this struct defines the way the registers are stored on the
+   stack during a system call. */
+
+#define NDS32_REG long
+
+struct pt_regs {
+	NDS32_REG ir0;
+	NDS32_REG ipsw;
+	NDS32_REG ipc;
+	NDS32_REG sp;
+	NDS32_REG orig_r0;
+	NDS32_REG pipsw;
+	NDS32_REG pipc;
+	NDS32_REG pp0;
+	NDS32_REG pp1;
+	NDS32_REG d0hi;
+	NDS32_REG d0lo;
+	NDS32_REG d1hi;
+	NDS32_REG d1lo;
+	NDS32_REG r[26];	/* r0 - r25 */
+	NDS32_REG fp;		/* r28 */
+	NDS32_REG gp;		/* r29 */
+	NDS32_REG lp;		/* r30 */
+	NDS32_REG fucop_ctl;
+	NDS32_REG osp;
+};
+
+#define processor_mode(regs) \
+	(((regs)->ipsw & MODE_MASK) >> 3)
+
+#define interrupts_enabled(regs) \
+	((regs)->ipsw & GIE_BIT)
+
+/*
+ * Offsets used by 'ptrace' system call interface.
+ * These can't be changed without breaking binary compatibility
+ * with MkLinux, etc.
+ */
+#define PT_R0	0
+#define PT_R1	1
+#define PT_R2	2
+#define PT_R3	3
+#define PT_R4	4
+#define PT_R5	5
+#define PT_R6	6
+#define PT_R7	7
+#define PT_R8	8
+#define PT_R9	9
+#define PT_R10	10
+#define PT_R11	11
+#define PT_R12	12
+#define PT_R13	13
+#define PT_R14	14
+#define PT_R15	15
+#define PT_R16	16
+#define PT_R17	17
+#define PT_R18	18
+#define PT_R19	19
+#define PT_R20	20
+#define PT_R21	21
+#define PT_R22	22
+#define PT_R23	23
+#define PT_R24	24
+#define PT_R25	25
+
+#endif	/* __ASSEMBLY__ */
+
+#endif /* __ASM_NDS_PTRACE_H */