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 <cpus.h>
  55 #include <mach_assert.h>
  56
  57 typedef unsigned short i386_ioport_t;
  58
  59 /* read a longword */
  60 extern unsigned long    inl(
  61                                 i386_ioport_t   port);
  62 /* read a shortword */
  63 extern unsigned short   inw(
  64                                 i386_ioport_t   port);
  65 /* read a byte */
  66 extern unsigned char    inb(
  67                                 i386_ioport_t   port);
  68 /* write a longword */
  69 extern void             outl(
  70                                 i386_ioport_t   port,
  71                                 unsigned long   datum);
  72 /* write a word */
  73 extern void             outw(
  74                                 i386_ioport_t   port,
  75                                 unsigned short  datum);
  76 /* write a longword */
  77 extern void             outb(
  78                                 i386_ioport_t   port,
  79                                 unsigned char   datum);
  80
  81 /* input an array of longwords */
  82 extern void             linl(
  83                                 i386_ioport_t   port,
  84                                 int             * data,
  85                                 int             count);
  86 /* output an array of longwords */
  87 extern void             loutl(
  88                                 i386_ioport_t   port,
  89                                 int             * data,
  90                                 int             count);
  91
  92 /* input an array of words */
  93 extern void             linw(
  94                                 i386_ioport_t   port,
  95                                 int             * data,
  96                                 int             count);
  97 /* output an array of words */
  98 extern void             loutw(
  99                                 i386_ioport_t   port,
 100                                 int             * data,
 101                                 int             count);
 102
 103 /* input an array of bytes */
 104 extern void             linb(
 105                                 i386_ioport_t   port,
 106                                 char            * data,
 107                                 int             count);
 108 /* output an array of bytes */
 109 extern void             loutb(
 110                                 i386_ioport_t   port,
 111                                 char            * data,
 112                                 int             count);
 113
 114 #if defined(__GNUC__) && (!MACH_ASSERT)
 115 extern __inline__ unsigned long inl(
 116                                 i386_ioport_t port)
 117 {
 118         unsigned long datum;
 119         __asm__ volatile("inl %1, %0" : "=a" (datum) : "d" (port));
 120         return(datum);
 121 }
 122
 123 extern __inline__ unsigned short inw(
 124                                 i386_ioport_t port)
 125 {
 126         unsigned short datum;
 127         __asm__ volatile(".byte 0x66; inl %1, %0" : "=a" (datum) : "d" (port));
 128         return(datum);
 129 }
 130
 131 extern __inline__ unsigned char inb(
 132                                 i386_ioport_t port)
 133 {
 134         unsigned char datum;
 135         __asm__ volatile("inb %1, %0" : "=a" (datum) : "d" (port));
 136         return(datum);
 137 }
 138
 139 extern __inline__ void outl(
 140                                 i386_ioport_t port,
 141                                 unsigned long datum)
 142 {
 143         __asm__ volatile("outl %0, %1" : : "a" (datum), "d" (port));
 144 }
 145
 146 extern __inline__ void outw(
 147                                 i386_ioport_t port,
 148                                 unsigned short datum)
 149 {
 150         __asm__ volatile(".byte 0x66; outl %0, %1" : : "a" (datum), "d" (port));
 151 }
 152
 153 extern __inline__ void outb(
 154                                 i386_ioport_t port,
 155                                 unsigned char datum)
 156 {
 157         __asm__ volatile("outb %0, %1" : : "a" (datum), "d" (port));
 158 }
 159 #endif /* defined(__GNUC__) && (!MACH_ASSERT) */
 160 #endif /* I386_PIO_H */