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diff --git a/src/mesa/drivers/dri/common/mmio.h b/src/mesa/drivers/dri/common/mmio.h
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+/*
+ * (C) Copyright IBM Corporation 2004
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file mmio.h
+ * Functions for properly handling memory mapped IO on various platforms.
+ *
+ * \author Ian Romanick <idr@us.ibm.com>
+ */
+
+
+#ifndef MMIO_H
+#define MMIO_H
+
+#include "glheader.h"
+
+#if defined( __powerpc__ )
+
+static __inline__ u_int32_t
+read_MMIO_LE32( volatile void * base, unsigned long offset )
+{
+ u_int32_t val;
+
+ __asm__ __volatile__( "lwbrx %0, %1, %2 ; eieio"
+ : "=r" (val)
+ : "b" (base), "r" (offset) );
+ return val;
+}
+
+#else
+
+static __inline__ u_int32_t
+read_MMIO_LE32( volatile void * base, unsigned long offset )
+{
+ volatile u_int32_t * p = (volatile u_int32_t *) (((volatile char *) base) + offset);
+ return LE32_TO_CPU( p[0] );
+}
+
+#endif
+
+#endif /* MMIO_H */