sys/arch/powerpc/include/openpic.h

   1 /*      $NetBSD: openpic.h,v 1.6 2007/10/17 19:56:41 garbled 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 u_int openpic_read(int);
  36 static __inline void openpic_write(int, u_int);
  37 static __inline int openpic_read_irq(int);
  38 static __inline void openpic_eoi(int);
  39
  40 static __inline u_int
  41 openpic_read(reg)
  42         int reg;
  43 {
  44         volatile unsigned char *addr = openpic_base + reg;
  45
  46         return in32rb(addr);
  47 }
  48
  49 static __inline void
  50 openpic_write(reg, val)
  51         int reg;
  52         u_int val;
  53 {
  54         volatile unsigned char *addr = openpic_base + reg;
  55
  56         out32rb(addr, val);
  57 }
  58
  59 static __inline int
  60 openpic_read_irq(cpu)
  61         int cpu;
  62 {
  63         return openpic_read(OPENPIC_IACK(cpu)) & OPENPIC_VECTOR_MASK;
  64 }
  65
  66 static __inline void
  67 openpic_eoi(cpu)
  68         int cpu;
  69 {
  70         openpic_write(OPENPIC_EOI(cpu), 0);
  71         openpic_read(OPENPIC_EOI(cpu));
  72 }