120 lines
3.5 KiB
C
120 lines
3.5 KiB
C
/*
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* Copyright (c) 1993 Charles Hannum.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles Hannum.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: pio.h,v 1.7 1994/01/28 23:44:18 jtc Exp $
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*/
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/*
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* Functions to provide access to i386 programmed I/O instructions.
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*/
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static __inline u_char
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inb(u_short port)
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{
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u_char data;
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__asm __volatile("inb %1,%0" : "=a" (data) : "d" (port));
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return data;
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}
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static __inline void
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insb(u_short port, void *addr, int cnt)
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{
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__asm __volatile("cld\n\trepne\n\tinsb" :
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: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
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}
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static __inline u_short
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inw(u_short port)
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{
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u_short data;
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__asm __volatile("inw %1,%0" : "=a" (data) : "d" (port));
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return data;
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}
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static __inline void
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insw(u_short port, void *addr, int cnt)
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{
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__asm __volatile("cld\n\trepne\n\tinsw" :
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: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
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}
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static __inline u_int
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inl(u_short port)
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{
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u_int data;
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__asm __volatile("inl %1,%0" : "=a" (data) : "d" (port));
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return data;
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}
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static __inline void
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insl(u_short port, void *addr, int cnt)
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{
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__asm __volatile("cld\n\trepne\n\tinsl" :
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: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
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}
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static __inline void
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outb(u_short port, u_char data)
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{
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__asm __volatile("outb %0,%1" : : "a" (data), "d" (port));
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}
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static __inline void
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outsb(u_short port, void *addr, int cnt)
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{
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__asm __volatile("cld\n\trepne\n\toutsb" :
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: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
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}
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static __inline void
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outw(u_short port, u_short data)
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{
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__asm __volatile("outw %0,%1" : : "a" (data), "d" (port));
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}
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static __inline void
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outsw(u_short port, void *addr, int cnt)
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{
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__asm __volatile("cld\n\trepne\n\toutsw" :
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: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
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}
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static __inline void
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outl(u_short port, u_int data)
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{
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__asm __volatile("outl %0,%1" : : "a" (data), "d" (port));
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}
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static __inline void
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outsl(u_short port, void *addr, int cnt)
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{
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__asm __volatile("cld\n\trepne\n\toutsl" :
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: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
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}
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