osfmk/i386/pio.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  */
  28 /*
  29  * Mach Operating System
  30  * Copyright (c) 1991,1990 Carnegie Mellon University
  31  * All Rights Reserved.
  32  *
  33  * Permission to use, copy, modify and distribute this software and its
  34  * documentation is hereby granted, provided that both the copyright
  35  * notice and this permission notice appear in all copies of the
  36  * software, derivative works or modified versions, and any portions
  37  * thereof, and that both notices appear in supporting documentation.
  38  *
  39  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  40  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  41  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  42  *
  43  * Carnegie Mellon requests users of this software to return to
  44  *
  45  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  46  *  School of Computer Science
  47  *  Carnegie Mellon University
  48  *  Pittsburgh PA 15213-3890
  49  *
  50  * any improvements or extensions that they make and grant Carnegie Mellon
  51  * the rights to redistribute these changes.
  52  */
  53 /*
  54  */
  55 #ifndef I386_PIO_H
  56 #define I386_PIO_H
  57 #include <cpus.h>
  58 #include <mach_assert.h>
  59
  60 typedef unsigned short i386_ioport_t;
  61
  62 /* read a longword */
  63 extern unsigned long    inl(
  64                                 i386_ioport_t   port);
  65 /* read a shortword */
  66 extern unsigned short   inw(
  67                                 i386_ioport_t   port);
  68 /* read a byte */
  69 extern unsigned char    inb(
  70                                 i386_ioport_t   port);
  71 /* write a longword */
  72 extern void             outl(
  73                                 i386_ioport_t   port,
  74                                 unsigned long   datum);
  75 /* write a word */
  76 extern void             outw(
  77                                 i386_ioport_t   port,
  78                                 unsigned short  datum);
  79 /* write a longword */
  80 extern void             outb(
  81                                 i386_ioport_t   port,
  82                                 unsigned char   datum);
  83
  84 /* input an array of longwords */
  85 extern void             linl(
  86                                 i386_ioport_t   port,
  87                                 int             * data,
  88                                 int             count);
  89 /* output an array of longwords */
  90 extern void             loutl(
  91                                 i386_ioport_t   port,
  92                                 int             * data,
  93                                 int             count);
  94
  95 /* input an array of words */
  96 extern void             linw(
  97                                 i386_ioport_t   port,
  98                                 int             * data,
  99                                 int             count);
 100 /* output an array of words */
 101 extern void             loutw(
 102                                 i386_ioport_t   port,
 103                                 int             * data,
 104                                 int             count);
 105
 106 /* input an array of bytes */
 107 extern void             linb(
 108                                 i386_ioport_t   port,
 109                                 char            * data,
 110                                 int             count);
 111 /* output an array of bytes */
 112 extern void             loutb(
 113                                 i386_ioport_t   port,
 114                                 char            * data,
 115                                 int             count);
 116
 117 #if defined(__GNUC__) && (!MACH_ASSERT)
 118 extern __inline__ unsigned long inl(
 119                                 i386_ioport_t port)
 120 {
 121         unsigned long datum;
 122         __asm__ volatile("inl %1, %0" : "=a" (datum) : "d" (port));
 123         return(datum);
 124 }
 125
 126 extern __inline__ unsigned short inw(
 127                                 i386_ioport_t port)
 128 {
 129         unsigned short datum;
 130         __asm__ volatile(".byte 0x66; inl %1, %0" : "=a" (datum) : "d" (port));
 131         return(datum);
 132 }
 133
 134 extern __inline__ unsigned char inb(
 135                                 i386_ioport_t port)
 136 {
 137         unsigned char datum;
 138         __asm__ volatile("inb %1, %0" : "=a" (datum) : "d" (port));
 139         return(datum);
 140 }
 141
 142 extern __inline__ void outl(
 143                                 i386_ioport_t port,
 144                                 unsigned long datum)
 145 {
 146         __asm__ volatile("outl %0, %1" : : "a" (datum), "d" (port));
 147 }
 148
 149 extern __inline__ void outw(
 150                                 i386_ioport_t port,
 151                                 unsigned short datum)
 152 {
 153         __asm__ volatile(".byte 0x66; outl %0, %1" : : "a" (datum), "d" (port));
 154 }
 155
 156 extern __inline__ void outb(
 157                                 i386_ioport_t port,
 158                                 unsigned char datum)
 159 {
 160         __asm__ volatile("outb %0, %1" : : "a" (datum), "d" (port));
 161 }
 162 #endif /* defined(__GNUC__) && (!MACH_ASSERT) */
 163 #endif /* I386_PIO_H */