diff --git a/include/asm-sh64/system.h b/include/asm-sh64/system.h
new file mode 100644
index 0000000..42510e4
--- /dev/null
+++ b/include/asm-sh64/system.h
@@ -0,0 +1,195 @@
+#ifndef __ASM_SH64_SYSTEM_H
+#define __ASM_SH64_SYSTEM_H
+
+/*
+ * 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.
+ *
+ * include/asm-sh64/system.h
+ *
+ * Copyright (C) 2000, 2001  Paolo Alberelli
+ * Copyright (C) 2003  Paul Mundt
+ * Copyright (C) 2004  Richard Curnow
+ *
+ */
+
+#include <linux/config.h>
+#include <asm/registers.h>
+#include <asm/processor.h>
+
+/*
+ *	switch_to() should switch tasks to task nr n, first
+ */
+
+typedef struct {
+	unsigned long seg;
+} mm_segment_t;
+
+extern struct task_struct *sh64_switch_to(struct task_struct *prev,
+					  struct thread_struct *prev_thread,
+					  struct task_struct *next,
+					  struct thread_struct *next_thread);
+
+#define switch_to(prev,next,last) \
+	do {\
+		if (last_task_used_math != next) {\
+			struct pt_regs *regs = next->thread.uregs;\
+			if (regs) regs->sr |= SR_FD;\
+		}\
+		last = sh64_switch_to(prev, &prev->thread, next, &next->thread);\
+	} while(0)
+
+#define nop() __asm__ __volatile__ ("nop")
+
+#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
+
+#define tas(ptr) (xchg((ptr), 1))
+
+extern void __xchg_called_with_bad_pointer(void);
+
+#define mb()	__asm__ __volatile__ ("synco": : :"memory")
+#define rmb()	mb()
+#define wmb()	__asm__ __volatile__ ("synco": : :"memory")
+#define read_barrier_depends()	do { } while (0)
+
+#ifdef CONFIG_SMP
+#define smp_mb()	mb()
+#define smp_rmb()	rmb()
+#define smp_wmb()	wmb()
+#define smp_read_barrier_depends()	read_barrier_depends()
+#else
+#define smp_mb()	barrier()
+#define smp_rmb()	barrier()
+#define smp_wmb()	barrier()
+#define smp_read_barrier_depends()	do { } while (0)
+#endif /* CONFIG_SMP */
+
+#define set_rmb(var, value) do { xchg(&var, value); } while (0)
+#define set_mb(var, value) set_rmb(var, value)
+#define set_wmb(var, value) do { var = value; wmb(); } while (0)
+
+/* Interrupt Control */
+#ifndef HARD_CLI
+#define SR_MASK_L 0x000000f0L
+#define SR_MASK_LL 0x00000000000000f0LL
+#else
+#define SR_MASK_L 0x10000000L
+#define SR_MASK_LL 0x0000000010000000LL
+#endif
+
+static __inline__ void local_irq_enable(void)
+{
+	/* cli/sti based on SR.BL */
+	unsigned long long __dummy0, __dummy1=~SR_MASK_LL;
+
+	__asm__ __volatile__("getcon	" __SR ", %0\n\t"
+			     "and	%0, %1, %0\n\t"
+			     "putcon	%0, " __SR "\n\t"
+			     : "=&r" (__dummy0)
+			     : "r" (__dummy1));
+}
+
+static __inline__ void local_irq_disable(void)
+{
+	/* cli/sti based on SR.BL */
+	unsigned long long __dummy0, __dummy1=SR_MASK_LL;
+	__asm__ __volatile__("getcon	" __SR ", %0\n\t"
+			     "or	%0, %1, %0\n\t"
+			     "putcon	%0, " __SR "\n\t"
+			     : "=&r" (__dummy0)
+			     : "r" (__dummy1));
+}
+
+#define local_save_flags(x) 						\
+(__extension__ ({	unsigned long long __dummy=SR_MASK_LL;		\
+	__asm__ __volatile__(						\
+		"getcon	" __SR ", %0\n\t"				\
+		"and	%0, %1, %0"					\
+		: "=&r" (x)						\
+		: "r" (__dummy));}))
+
+#define local_irq_save(x)						\
+(__extension__ ({	unsigned long long __d2=SR_MASK_LL, __d1;	\
+	__asm__ __volatile__(          	         			\
+		"getcon	" __SR ", %1\n\t" 				\
+		"or	%1, r63, %0\n\t"				\
+		"or	%1, %2, %1\n\t"					\
+		"putcon	%1, " __SR "\n\t"    				\
+		"and	%0, %2, %0"    					\
+		: "=&r" (x), "=&r" (__d1)				\
+		: "r" (__d2));}));
+
+#define local_irq_restore(x) do { 					\
+	if ( ((x) & SR_MASK_L) == 0 )		/* dropping to 0 ? */	\
+		local_irq_enable();		/* yes...re-enable */	\
+} while (0)
+
+#define irqs_disabled()			\
+({					\
+	unsigned long flags;		\
+	local_save_flags(flags);	\
+	(flags != 0);			\
+})
+
+extern __inline__ unsigned long xchg_u32(volatile int * m, unsigned long val)
+{
+	unsigned long flags, retval;
+
+	local_irq_save(flags);
+	retval = *m;
+	*m = val;
+	local_irq_restore(flags);
+	return retval;
+}
+
+extern __inline__ unsigned long xchg_u8(volatile unsigned char * m, unsigned long val)
+{
+	unsigned long flags, retval;
+
+	local_irq_save(flags);
+	retval = *m;
+	*m = val & 0xff;
+	local_irq_restore(flags);
+	return retval;
+}
+
+static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
+{
+	switch (size) {
+	case 4:
+		return xchg_u32(ptr, x);
+		break;
+	case 1:
+		return xchg_u8(ptr, x);
+		break;
+	}
+	__xchg_called_with_bad_pointer();
+	return x;
+}
+
+/* XXX
+ * disable hlt during certain critical i/o operations
+ */
+#define HAVE_DISABLE_HLT
+void disable_hlt(void);
+void enable_hlt(void);
+
+
+#define smp_mb()        barrier()
+#define smp_rmb()       barrier()
+#define smp_wmb()       barrier()
+
+#ifdef CONFIG_SH_ALPHANUMERIC
+/* This is only used for debugging. */
+extern void print_seg(char *file,int line);
+#define PLS() print_seg(__FILE__,__LINE__)
+#else	/* CONFIG_SH_ALPHANUMERIC */
+#define PLS()
+#endif	/* CONFIG_SH_ALPHANUMERIC */
+
+#define PL() printk("@ <%s,%s:%d>\n",__FILE__,__FUNCTION__,__LINE__)
+
+#define arch_align_stack(x) (x)
+
+#endif /* __ASM_SH64_SYSTEM_H */