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openpic.h revision 1.5 
      1 /*	$NetBSD: openpic.h,v 1.5 2006/02/16 20:17:14 perry Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000 Tsubai Masanari.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <machine/pio.h>
     30 
     31 #include <machine/openpicreg.h>
     32 
     33 /* void openpic_init(): defined in machdep code, must set openpic_base */
     34 void openpic_enable_irq __P((int, int));
     35 void openpic_disable_irq __P((int));
     36 void openpic_set_priority __P((int, int));
     37 
     38 extern volatile unsigned char *openpic_base;
     39 
     40 static __inline u_int openpic_read __P((int));
     41 static __inline void openpic_write __P((int, u_int));
     42 static __inline int openpic_read_irq __P((int));
     43 static __inline void openpic_eoi __P((int));
     44 
     45 static __inline u_int
     46 openpic_read(reg)
     47 	int reg;
     48 {
     49 	volatile unsigned char *addr = openpic_base + reg;
     50 
     51 	return in32rb(addr);
     52 }
     53 
     54 static __inline void
     55 openpic_write(reg, val)
     56 	int reg;
     57 	u_int val;
     58 {
     59 	volatile unsigned char *addr = openpic_base + reg;
     60 
     61 	out32rb(addr, val);
     62 }
     63 
     64 static __inline int
     65 openpic_read_irq(cpu)
     66 	int cpu;
     67 {
     68 	return openpic_read(OPENPIC_IACK(cpu)) & OPENPIC_VECTOR_MASK;
     69 }
     70 
     71 static __inline void
     72 openpic_eoi(cpu)
     73 	int cpu;
     74 {
     75 	openpic_write(OPENPIC_EOI(cpu), 0);
     76 	openpic_read(OPENPIC_EOI(cpu));
     77 }
     78