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+/* 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 */