diff --git a/include/asm-sparc64/uctx.h b/include/asm-sparc64/uctx.h
new file mode 100644
index 0000000..6eaf16e
--- /dev/null
+++ b/include/asm-sparc64/uctx.h
@@ -0,0 +1,71 @@
+/* $Id: uctx.h,v 1.1 1997/06/18 16:51:58 davem Exp $
+ * uctx.h: Sparc64 {set,get}context() register state layouts.
+ *
+ * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#ifndef __SPARC64_UCTX_H
+#define __SPARC64_UCTX_H
+
+#define MC_TSTATE	0
+#define MC_PC		1
+#define MC_NPC		2
+#define MC_Y		3
+#define MC_G1		4
+#define MC_G2		5
+#define MC_G3		6
+#define MC_G4		7
+#define MC_G5		8
+#define MC_G6		9
+#define MC_G7		10
+#define MC_O0		11
+#define MC_O1		12
+#define MC_O2		13
+#define MC_O3		14
+#define MC_O4		15
+#define MC_O5		16
+#define MC_O6		17
+#define MC_O7		18
+#define MC_NGREG	19
+
+typedef unsigned long mc_greg_t;
+typedef mc_greg_t mc_gregset_t[MC_NGREG];
+
+#define MC_MAXFPQ	16
+struct mc_fq {
+	unsigned long	*mcfq_addr;
+	unsigned int	mcfq_insn;
+};
+
+struct mc_fpu {
+	union {
+		unsigned int	sregs[32];
+		unsigned long	dregs[32];
+		long double	qregs[16];
+	} mcfpu_fregs;
+	unsigned long	mcfpu_fsr;
+	unsigned long	mcfpu_fprs;
+	unsigned long	mcfpu_gsr;
+	struct mc_fq	*mcfpu_fq;
+	unsigned char	mcfpu_qcnt;
+	unsigned char	mcfpu_qentsz;
+	unsigned char	mcfpu_enab;
+};
+typedef struct mc_fpu mc_fpu_t;
+
+typedef struct {
+	mc_gregset_t	mc_gregs;
+	mc_greg_t	mc_fp;
+	mc_greg_t	mc_i7;
+	mc_fpu_t	mc_fpregs;
+} mcontext_t;
+
+struct ucontext {
+	struct ucontext		*uc_link;
+	unsigned long		uc_flags;
+	sigset_t		uc_sigmask;
+	mcontext_t		uc_mcontext;
+};
+typedef struct ucontext ucontext_t;
+
+#endif /* __SPARC64_UCTX_H */