127 lines
3.4 KiB
C
127 lines
3.4 KiB
C
#ident "$Id: io.h,v 1.2 2004/01/25 07:49:39 hpa Exp $"
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/* ----------------------------------------------------------------------- *
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*
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* Copyright 2004 H. Peter Anvin - All Rights Reserved
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall
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* be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* ----------------------------------------------------------------------- */
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/*
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* sys/io.h for the i386 architecture
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*
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* Basic I/O macros
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*/
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#ifndef _SYS_IO_H
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#define _SYS_IO_H 1
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/* I/O-related system calls */
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int iopl(int);
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int ioperm(unsigned long, unsigned long, int);
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/* Basic I/O macros */
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static __inline__ void
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outb(unsigned char __v, unsigned short __p)
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{
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asm volatile("outb %0,%1" : : "a" (__v), "dN" (__p));
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}
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static __inline__ void
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outw(unsigned short __v, unsigned short __p)
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{
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asm volatile("outw %0,%1" : : "a" (__v), "dN" (__p));
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}
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static __inline__ void
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outl(unsigned int __v, unsigned short __p)
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{
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asm volatile("outl %0,%1" : : "a" (__v), "dN" (__p));
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}
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static __inline__ unsigned char
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inb(unsigned short __p)
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{
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unsigned char __v;
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asm volatile("inb %1,%0" : "=a" (__v) : "dN" (__p));
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return __v;
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}
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static __inline__ unsigned short
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inw(unsigned short __p)
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{
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unsigned short __v;
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asm volatile("inw %1,%0" : "=a" (__v) : "dN" (__p));
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return __v;
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}
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static __inline__ unsigned int
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inl(unsigned short __p)
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{
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unsigned int __v;
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asm volatile("inl %1,%0" : "=a" (__v) : "dN" (__p));
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return __v;
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}
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/* String I/O macros */
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static __inline__ void
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outsb (unsigned short __p, const void *__d, unsigned long __n)
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{
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asm volatile("cld; rep; outsb" : "+S" (__d), "+c" (__n) : "d" (__p));
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}
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static __inline__ void
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outsw (unsigned short __p, const void *__d, unsigned long __n)
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{
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asm volatile("cld; rep; outsw" : "+S" (__d), "+c" (__n) : "d" (__p));
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}
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static __inline__ void
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outsl (unsigned short __p, const void *__d, unsigned long __n)
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{
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asm volatile("cld; rep; outsl" : "+S" (__d), "+c" (__n) : "d" (__p));
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}
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static __inline__ void
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insb (unsigned short __p, void *__d, unsigned long __n)
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{
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asm volatile("cld; rep; insb" : "+D" (__d), "+c" (__n) : "d" (__p));
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}
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static __inline__ void
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insw (unsigned short __p, void *__d, unsigned long __n)
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{
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asm volatile("cld; rep; insw" : "+D" (__d), "+c" (__n) : "d" (__p));
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}
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static __inline__ void
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insl (unsigned short __p, void *__d, unsigned long __n)
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{
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asm volatile("cld; rep; insl" : "+D" (__d), "+c" (__n) : "d" (__p));
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}
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#endif /* _SYS_IO_H */
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