NetBSD/sys/arch/i386/include/pio.h

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/*
* Copyright (c) 1993 Charles Hannum.
* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles Hannum.
* 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
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* 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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*/
/*
* Functions to provide access to i386 programmed I/O instructions.
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*/
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static __inline u_char
inb(u_short port)
{
u_char data;
__asm __volatile("inb %1,%0" : "=a" (data) : "d" (port));
return data;
}
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static __inline void
insb(u_short port, void *addr, int cnt)
{
__asm __volatile("cld\n\trepne\n\tinsb" :
: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
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}
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static __inline u_short
inw(u_short port)
{
u_short data;
__asm __volatile("inw %1,%0" : "=a" (data) : "d" (port));
return data;
}
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static __inline void
insw(u_short port, void *addr, int cnt)
{
__asm __volatile("cld\n\trepne\n\tinsw" :
: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
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}
static __inline u_int
inl(u_short port)
{
u_int data;
__asm __volatile("inl %1,%0" : "=a" (data) : "d" (port));
return data;
}
static __inline void
insl(u_short port, void *addr, int cnt)
{
__asm __volatile("cld\n\trepne\n\tinsl" :
: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
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}
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static __inline void
outb(u_short port, u_char data)
{
__asm __volatile("outb %0,%1" : : "a" (data), "d" (port));
}
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static __inline void
outsb(u_short port, void *addr, int cnt)
{
__asm __volatile("cld\n\trepne\n\toutsb" :
: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
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}
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static __inline void
outw(u_short port, u_short data)
{
__asm __volatile("outw %0,%1" : : "a" (data), "d" (port));
}
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static __inline void
outsw(u_short port, void *addr, int cnt)
{
__asm __volatile("cld\n\trepne\n\toutsw" :
: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
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}
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static __inline void
outl(u_short port, u_int data)
{
__asm __volatile("outl %0,%1" : : "a" (data), "d" (port));
}
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static __inline void
outsl(u_short port, void *addr, int cnt)
{
__asm __volatile("cld\n\trepne\n\toutsl" :
: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
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}