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

186 lines
4.9 KiB
C

/* $NetBSD: pio.h,v 1.10 1994/11/20 21:36:44 mycroft Exp $ */
/*
* Copyright (c) 1993 Charles Hannum.
* All rights reserved.
*
* 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
* derived from this software without specific prior written permission
*
* 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.
*/
/*
* Functions to provide access to i386 programmed I/O instructions.
*/
#define inb(port) \
((__builtin_constant_p((port)) && (port) < 0x100) ? \
__inbc(port) : __inb(port))
static __inline u_char
__inbc(int port)
{
u_char data;
__asm __volatile("inb %1,%0" : "=a" (data) : "i" (port));
return data;
}
static __inline u_char
__inb(int port)
{
u_char data;
__asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port));
return data;
}
static __inline void
insb(int port, void *addr, int cnt)
{
__asm __volatile("cld\n\trepne\n\tinsb" :
: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
}
#define inw(port) \
((__builtin_constant_p((port)) && (port) < 0x100) ? \
__inwc(port) : __inw(port))
static __inline u_short
__inwc(int port)
{
u_short data;
__asm __volatile("inw %1,%0" : "=a" (data) : "i" (port));
return data;
}
static __inline u_short
__inw(int port)
{
u_short data;
__asm __volatile("inw %%dx,%0" : "=a" (data) : "d" (port));
return data;
}
static __inline void
insw(int port, void *addr, int cnt)
{
__asm __volatile("cld\n\trepne\n\tinsw" :
: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
}
#define inl(port) \
((__builtin_constant_p((port)) && (port) < 0x100) ? \
__inlc(port) : __inl(port))
static __inline u_int
__inlc(int port)
{
u_int data;
__asm __volatile("inl %1,%0" : "=a" (data) : "i" (port));
return data;
}
static __inline u_int
__inl(int port)
{
u_int data;
__asm __volatile("inl %%dx,%0" : "=a" (data) : "d" (port));
return data;
}
static __inline void
insl(int port, void *addr, int cnt)
{
__asm __volatile("cld\n\trepne\n\tinsl" :
: "d" (port), "D" (addr), "c" (cnt) : "%edi", "%ecx", "memory");
}
#define outb(port, data) \
((__builtin_constant_p((port)) && (port) < 0x100) ? \
__outbc(port, data) : __outb(port, data))
static __inline void
__outbc(int port, u_char data)
{
__asm __volatile("outb %0,%1" : : "a" (data), "i" (port));
}
static __inline void
__outb(int port, u_char data)
{
__asm __volatile("outb %0,%%dx" : : "a" (data), "d" (port));
}
static __inline void
outsb(int port, void *addr, int cnt)
{
__asm __volatile("cld\n\trepne\n\toutsb" :
: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
}
#define outw(port, data) \
((__builtin_constant_p((port)) && (port) < 0x100) ? \
__outwc(port, data) : __outw(port, data))
static __inline void
__outwc(int port, u_short data)
{
__asm __volatile("outw %0,%1" : : "a" (data), "i" (port));
}
static __inline void
__outw(int port, u_short data)
{
__asm __volatile("outw %0,%%dx" : : "a" (data), "d" (port));
}
static __inline void
outsw(int port, void *addr, int cnt)
{
__asm __volatile("cld\n\trepne\n\toutsw" :
: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
}
#define outl(port, data) \
((__builtin_constant_p((port)) && (port) < 0x100) ? \
__outlc(port, data) : __outl(port, data))
static __inline void
__outlc(int port, u_int data)
{
__asm __volatile("outl %0,%1" : : "a" (data), "i" (port));
}
static __inline void
__outl(int port, u_int data)
{
__asm __volatile("outl %0,%%dx" : : "a" (data), "d" (port));
}
static __inline void
outsl(int port, void *addr, int cnt)
{
__asm __volatile("cld\n\trepne\n\toutsl" :
: "d" (port), "S" (addr), "c" (cnt) : "%esi", "%ecx");
}