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diff --git a/lib/libthr/arch/powerpc/include/pthread_md.h b/lib/libthr/arch/powerpc/include/pthread_md.h
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+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright 2004 by Peter Grehan. 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * 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.
+ */
+
+/*
+ * Machine-dependent thread prototypes/definitions.
+ */
+#ifndef _PTHREAD_MD_H_
+#define _PTHREAD_MD_H_
+
+#include <sys/types.h>
+#include <machine/tls.h>
+
+#define CPU_SPINWAIT
+
+/* For use in _Static_assert to check structs will fit in a page */
+#define THR_PAGE_SIZE_MIN PAGE_SIZE
+
+static __inline struct pthread *
+_get_curthread(void)
+{
+ if (_thr_initial)
+ return (_tcb_get()->tcb_thread);
+ return (NULL);
+}
+
+static __inline void
+_thr_resolve_machdep(void)
+{
+}
+
+#define __thr_setup_tsd(thread) _tcb_set((thread)->tcb)
+
+#endif /* _PTHREAD_MD_H_ */