232 lines
6.0 KiB
C
232 lines
6.0 KiB
C
/* $NetBSD: pio.h,v 1.19 2001/12/28 06:44:12 thorpej Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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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 the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _I386_PIO_H_
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#define _I386_PIO_H_
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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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* The in[bwl]() and out[bwl]() functions are split into two varieties: one to
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* use a small, constant, 8-bit port number, and another to use a large or
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* variable port number. The former can be compiled as a smaller instruction.
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*/
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#ifdef __OPTIMIZE__
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#define __use_immediate_port(port) \
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(__builtin_constant_p((port)) && (port) < 0x100)
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#else
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#define __use_immediate_port(port) 0
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#endif
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#define inb(port) \
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(/* CONSTCOND */ __use_immediate_port(port) ? __inbc(port) : __inb(port))
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static __inline u_int8_t
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__inbc(u_long port)
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{
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u_int8_t data;
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__asm __volatile("inb %w1,%0" : "=a" (data) : "id" (port));
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return data;
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}
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static __inline u_int8_t
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__inb(u_long port)
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{
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u_int8_t data;
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__asm __volatile("inb %w1,%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_long port, void *addr, int cnt)
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{
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void *dummy1;
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int dummy2;
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__asm __volatile("cld\n\trepne\n\tinsb" :
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"=D" (dummy1), "=c" (dummy2) :
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"d" (port), "0" (addr), "1" (cnt) :
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"memory");
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}
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#define inw(port) \
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(/* CONSTCOND */ __use_immediate_port(port) ? __inwc(port) : __inw(port))
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static __inline u_int16_t
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__inwc(u_long port)
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{
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u_int16_t data;
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__asm __volatile("inw %w1,%0" : "=a" (data) : "id" (port));
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return data;
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}
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static __inline u_int16_t
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__inw(u_long port)
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{
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u_int16_t data;
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__asm __volatile("inw %w1,%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_long port, void *addr, int cnt)
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{
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void *dummy1;
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int dummy2;
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__asm __volatile("cld\n\trepne\n\tinsw" :
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"=D" (dummy1), "=c" (dummy2) :
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"d" (port), "0" (addr), "1" (cnt) :
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"memory");
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}
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#define inl(port) \
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(/* CONSTCOND */ __use_immediate_port(port) ? __inlc(port) : __inl(port))
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static __inline u_int32_t
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__inlc(u_long port)
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{
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u_int32_t data;
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__asm __volatile("inl %w1,%0" : "=a" (data) : "id" (port));
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return data;
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}
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static __inline u_int32_t
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__inl(u_long port)
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{
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u_int32_t data;
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__asm __volatile("inl %w1,%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_long port, void *addr, int cnt)
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{
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void *dummy1;
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int dummy2;
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__asm __volatile("cld\n\trepne\n\tinsl" :
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"=D" (dummy1), "=c" (dummy2) :
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"d" (port), "0" (addr), "1" (cnt) :
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"memory");
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}
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#define outb(port, data) \
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(/* CONSTCOND */ __use_immediate_port(port) ? __outbc(port, data) : \
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__outb(port, data))
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static __inline void
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__outbc(u_long port, u_int8_t data)
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{
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__asm __volatile("outb %0,%w1" : : "a" (data), "id" (port));
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}
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static __inline void
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__outb(u_long port, u_int8_t data)
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{
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__asm __volatile("outb %0,%w1" : : "a" (data), "d" (port));
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}
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static __inline void
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outsb(u_long port, const void *addr, int cnt)
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{
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void *dummy1;
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int dummy2;
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__asm __volatile("cld\n\trepne\n\toutsb" :
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"=S" (dummy1), "=c" (dummy2) :
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"d" (port), "0" (addr), "1" (cnt));
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}
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#define outw(port, data) \
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(/* CONSTCOND */ __use_immediate_port(port) ? __outwc(port, data) : \
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__outw(port, data))
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static __inline void
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__outwc(u_long port, u_int16_t data)
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{
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__asm __volatile("outw %0,%w1" : : "a" (data), "id" (port));
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}
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static __inline void
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__outw(u_long port, u_int16_t data)
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{
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__asm __volatile("outw %0,%w1" : : "a" (data), "d" (port));
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}
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static __inline void
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outsw(u_long port, const void *addr, int cnt)
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{
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void *dummy1;
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int dummy2;
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__asm __volatile("cld\n\trepne\n\toutsw" :
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"=S" (dummy1), "=c" (dummy2) :
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"d" (port), "0" (addr), "1" (cnt));
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}
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#define outl(port, data) \
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(/* CONSTCOND */ __use_immediate_port(port) ? __outlc(port, data) : \
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__outl(port, data))
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static __inline void
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__outlc(u_long port, u_int32_t data)
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{
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__asm __volatile("outl %0,%w1" : : "a" (data), "id" (port));
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}
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static __inline void
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__outl(u_long port, u_int32_t data)
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{
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__asm __volatile("outl %0,%w1" : : "a" (data), "d" (port));
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}
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static __inline void
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outsl(u_long port, const void *addr, int cnt)
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{
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void *dummy1;
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int dummy2;
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__asm __volatile("cld\n\trepne\n\toutsl" :
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"=S" (dummy1), "=c" (dummy2) :
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"d" (port), "0" (addr), "1" (cnt));
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}
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#endif /* _I386_PIO_H_ */
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