osfmk/i386/pio.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  */
  25 /*
  26  * Mach Operating System
  27  * Copyright (c) 1991,1990 Carnegie Mellon University
  28  * All Rights Reserved.
  29  *
  30  * Permission to use, copy, modify and distribute this software and its
  31  * documentation is hereby granted, provided that both the copyright
  32  * notice and this permission notice appear in all copies of the
  33  * software, derivative works or modified versions, and any portions
  34  * thereof, and that both notices appear in supporting documentation.
  35  *
  36  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  37  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  38  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  39  *
  40  * Carnegie Mellon requests users of this software to return to
  41  *
  42  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  43  *  School of Computer Science
  44  *  Carnegie Mellon University
  45  *  Pittsburgh PA 15213-3890
  46  *
  47  * any improvements or extensions that they make and grant Carnegie Mellon
  48  * the rights to redistribute these changes.
  49  */
  50 /*
  51  */
  52 #ifndef I386_PIO_H
  53 #define I386_PIO_H
  54 #include <mach_assert.h>
  55
  56 typedef unsigned short i386_ioport_t;
  57
  58 /* read a longword */
  59 extern unsigned long    inl(
  60                                 i386_ioport_t   port);
  61 /* read a shortword */
  62 extern unsigned short   inw(
  63                                 i386_ioport_t   port);
  64 /* read a byte */
  65 extern unsigned char    inb(
  66                                 i386_ioport_t   port);
  67 /* write a longword */
  68 extern void             outl(
  69                                 i386_ioport_t   port,
  70                                 unsigned long   datum);
  71 /* write a word */
  72 extern void             outw(
  73                                 i386_ioport_t   port,
  74                                 unsigned short  datum);
  75 /* write a longword */
  76 extern void             outb(
  77                                 i386_ioport_t   port,
  78                                 unsigned char   datum);
  79
  80 /* input an array of longwords */
  81 extern void             linl(
  82                                 i386_ioport_t   port,
  83                                 int             * data,
  84                                 int             count);
  85 /* output an array of longwords */
  86 extern void             loutl(
  87                                 i386_ioport_t   port,
  88                                 int             * data,
  89                                 int             count);
  90
  91 /* input an array of words */
  92 extern void             linw(
  93                                 i386_ioport_t   port,
  94                                 int             * data,
  95                                 int             count);
  96 /* output an array of words */
  97 extern void             loutw(
  98                                 i386_ioport_t   port,
  99                                 int             * data,
 100                                 int             count);
 101
 102 /* input an array of bytes */
 103 extern void             linb(
 104                                 i386_ioport_t   port,
 105                                 char            * data,
 106                                 int             count);
 107 /* output an array of bytes */
 108 extern void             loutb(
 109                                 i386_ioport_t   port,
 110                                 char            * data,
 111                                 int             count);
 112
 113 #if defined(__GNUC__) && (!MACH_ASSERT)
 114 extern __inline__ unsigned long inl(
 115                                 i386_ioport_t port)
 116 {
 117         unsigned long datum;
 118         __asm__ volatile("inl %1, %0" : "=a" (datum) : "d" (port));
 119         return(datum);
 120 }
 121
 122 extern __inline__ unsigned short inw(
 123                                 i386_ioport_t port)
 124 {
 125         unsigned short datum;
 126         __asm__ volatile(".byte 0x66; inl %1, %0" : "=a" (datum) : "d" (port));
 127         return(datum);
 128 }
 129
 130 extern __inline__ unsigned char inb(
 131                                 i386_ioport_t port)
 132 {
 133         unsigned char datum;
 134         __asm__ volatile("inb %1, %0" : "=a" (datum) : "d" (port));
 135         return(datum);
 136 }
 137
 138 extern __inline__ void outl(
 139                                 i386_ioport_t port,
 140                                 unsigned long datum)
 141 {
 142         __asm__ volatile("outl %0, %1" : : "a" (datum), "d" (port));
 143 }
 144
 145 extern __inline__ void outw(
 146                                 i386_ioport_t port,
 147                                 unsigned short datum)
 148 {
 149         __asm__ volatile(".byte 0x66; outl %0, %1" : : "a" (datum), "d" (port));
 150 }
 151
 152 extern __inline__ void outb(
 153                                 i386_ioport_t port,
 154                                 unsigned char datum)
 155 {
 156         __asm__ volatile("outb %0, %1" : : "a" (datum), "d" (port));
 157 }
 158 #endif /* defined(__GNUC__) && (!MACH_ASSERT) */
 159 #endif /* I386_PIO_H */