diff --git a/sys/powerpc/include/smp.h b/sys/powerpc/include/smp.h
index 15ec74ce8f80..8f08dfb5ab93 100644
--- a/sys/powerpc/include/smp.h
+++ b/sys/powerpc/include/smp.h
@@ -1,7 +1,64 @@
-/* $FreeBSD$ */
-
-/*
- * An empty file now,
- * Although in the times to come,
- * More may be found here.
+/*-
+ * Copyright (c) 2008 Marcel Moolenaar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
  */
+
+#ifndef _MACHINE_SMP_H_
+#define _MACHINE_SMP_H_
+
+#ifdef _KERNEL
+
+#define	IPI_AST			0
+#define	IPI_PREEMPT		1
+#define	IPI_RENDEZVOUS		2
+#define	IPI_STOP		3
+
+#define	IPI_PPC_TEST		4
+
+#ifndef LOCORE
+
+void	ipi_all(int ipi);
+void	ipi_all_but_self(int ipi);
+void	ipi_selected(cpumask_t cpus, int ipi);
+void	ipi_self(int ipi);
+
+struct cpuref {
+	uintptr_t	cr_hwref;
+	u_int		cr_cpuid;
+};
+
+int	powerpc_smp_first_cpu(struct cpuref *);
+int	powerpc_smp_get_bsp(struct cpuref *);
+int	powerpc_smp_next_cpu(struct cpuref *);
+int	powerpc_smp_start_cpu(struct pcpu *);
+
+void	pmap_cpu_bootstrap(volatile uint32_t *, int);
+uint32_t cpudep_ap_bootstrap(volatile uint32_t *);
+void	machdep_ap_bootstrap(volatile uint32_t *);
+
+#endif /* !LOCORE */
+#endif /* _KERNEL */
+#endif /* !_MACHINE_SMP_H */