osfmk/i386/pio.h

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