initial import

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diff --git a/sysdeps/standalone/m68k/m68020/m68020.h b/sysdeps/standalone/m68k/m68020/m68020.h
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+++ b/sysdeps/standalone/m68k/m68020/m68020.h
@@ -0,0 +1,88 @@
+/* Copyright (C) 1994 Free Software Foundation, Inc.
+   Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil),
+     On-Line Applications Research Corporation.
+ 
+This file is part of the GNU C Library.
+ 
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+ 
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+ 
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+/*  m68020.h
+ *
+ *  This file contains macros which are used to access MC68020 
+ *  registers which are not addressable by C.  These are
+ *  useful when developing the board specific support.
+ */
+
+#ifndef m68020_h__
+#define m68020_h__
+
+typedef void ( *mc68020_isr )( void );
+
+#define disable_intr( level ) \
+  { (level) = 0; \
+    asm volatile ( "movew   %%sr,%0 ; \
+                    orw     #0x0700,%%sr" \
+                    : "=d" ((level)) : "0" ((level)) ); \
+  }
+
+#define enable_intr( level ) \
+  { asm volatile ( "movew   %0,%%sr " \
+                       : "=d" ((level)) : "0" ((level)) ); \
+  }
+
+#define flash_intr( level ) \
+  { asm volatile ( "movew   %0,%%sr ; \
+                    orw     #0x0700,%%sr" \
+                       : "=d" ((level)) : "0" ((level)) ); \
+  }
+
+#define get_vbr( vbr ) \
+  { (vbr) = 0; \
+    asm volatile ( "movec   %%vbr,%0 " \
+                       : "=a" (vbr) : "0" (vbr) ); \
+  }
+
+#define set_vbr( vbr ) \
+  { register mc68020_isr *_vbr= (mc68020_isr *)(vbr); \
+    asm volatile ( "movec   %0,%%vbr " \
+                       : "=a" (_vbr) : "0" (_vbr) ); \
+  }
+
+#define enable_caching() \
+  { register unsigned int _ctl=0x01; \
+    asm volatile ( "movec   %0,%%cacr" \
+                       : "=d" (_ctl) : "0" (_ctl) ); \
+  }
+
+#define delay( microseconds ) \
+  { register unsigned int _delay=(microseconds); \
+    register unsigned int _tmp=123; \
+    asm volatile( "0: \
+                     nbcd      %0 ; \
+                     nbcd      %0 ; \
+                     dbf       %1,0 " \
+                  : "=d" (_tmp), "=d" (_delay) \
+                  : "0"  (_tmp), "1"  (_delay) ); \
+  }
+
+#define enable_tracing() 
+#define cause_intr( X ) 
+#define clear_intr( X ) 
+
+extern mc68020_isr     M68Kvec[];   /* vector table address */
+
+#endif
+/* end of include file */