Index: arch/sparc64/include/register.h
===================================================================
--- arch/sparc64/include/register.h	(revision 2cf87e50d5dcd3aefbd08693599d8fca4149537d)
+++ arch/sparc64/include/register.h	(revision d6e852916cb4672682728fa0540fe558bca857b2)
@@ -47,3 +47,23 @@
 typedef union ver_reg ver_reg_t;
 
+/** Processor State Register. */
+union pstate_reg {
+	__u64 value;
+	struct {
+		__u64 : 52;
+		unsigned ig : 1;	/**< Interrupt Globals. */
+		unsigned mg : 1;	/**< MMU Globals. */
+		unsigned cle : 1;	/**< Current Little Endian. */
+		unsigned tle : 1;	/**< Trap Little Endian. */
+		unsigned mm : 2;	/**< Memory Model. */
+		unsigned red : 1;	/**< RED state. */
+		unsigned pef : 1;	/**< Enable floating-point. */
+		unsigned am : 1;	/**< 32-bit Address Mask. */
+		unsigned priv : 1;	/**< Privileged Mode. */
+		unsigned ie : 1;	/**< Interrupt Enable. */
+		unsigned ag : 1;	/**< Alternate Globals*/
+	} __attribute__ ((packed));
+};
+typedef union pstate_reg pstate_reg_t;
+
 #endif