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      1 /*	$NetBSD: openpic.h,v 1.8 2012/02/01 02:03:51 matt 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 extern volatile unsigned char *openpic_base;
     34 
     35 static __inline uint32_t openpic_read(u_int);
     36 static __inline void openpic_write(u_int, uint32_t);
     37 static __inline int openpic_read_irq(int);
     38 static __inline void openpic_eoi(int);
     39 
     40 static __inline uint32_t
     41 openpic_read(u_int reg)
     42 {
     43 	volatile uint8_t *addr = openpic_base + reg;
     44 
     45 	return in32rb(addr);
     46 }
     47 
     48 static __inline void
     49 openpic_write(u_int reg, uint32_t val)
     50 {
     51 	volatile uint8_t *addr = openpic_base + reg;
     52 
     53 	out32rb(addr, val);
     54 }
     55 
     56 static __inline int
     57 openpic_read_irq(int cpu)
     58 {
     59 	return openpic_read(OPENPIC_IACK(cpu)) & OPENPIC_VECTOR_MASK;
     60 }
     61 
     62 static __inline void
     63 openpic_eoi(int cpu)
     64 {
     65 	openpic_write(OPENPIC_EOI(cpu), 0);
     66 	openpic_read(OPENPIC_EOI(cpu));
     67 }
     68