Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/osfmk/i386/pio.h
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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 */
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