$NetBSD: patch-af,v 1.1 2008/08/02 16:46:56 dholland Exp $ diff -urpN /dev/null x86_pio.h --- /dev/null 1969-12-31 19:00:00.000000000 -0500 +++ x86_pio.h 2008-08-02 12:15:47.000000000 -0400 @@ -0,0 +1,231 @@ +/* $NetBSD: patch-af,v 1.1 2008/08/02 16:46:56 dholland Exp $ */ + +/*- + * Copyright (c) 1998 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Charles M. Hannum. + * + * 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 the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``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 FOUNDATION OR CONTRIBUTORS + * 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. + */ + +#ifndef _X86_PIO_H_ +#define _X86_PIO_H_ + +/* + * Functions to provide access to x86 programmed I/O instructions. + * + * The in[bwl]() and out[bwl]() functions are split into two varieties: one to + * use a small, constant, 8-bit port number, and another to use a large or + * variable port number. The former can be compiled as a smaller instruction. + */ + + +#ifdef __OPTIMIZE__ + +#define __use_immediate_port(port) \ + (__builtin_constant_p((port)) && (port) < 0x100) + +#else + +#define __use_immediate_port(port) 0 + +#endif + + +#define inb(port) \ + (/* CONSTCOND */ __use_immediate_port(port) ? __inbc(port) : __inb(port)) + +static __inline u_int8_t +__inbc(unsigned port) +{ + u_int8_t data; + __asm volatile("inb %w1,%0" : "=a" (data) : "id" (port)); + return data; +} + +static __inline u_int8_t +__inb(unsigned port) +{ + u_int8_t data; + __asm volatile("inb %w1,%0" : "=a" (data) : "d" (port)); + return data; +} + +static __inline void +insb(unsigned port, void *addr, int cnt) +{ + void *dummy1; + int dummy2; + __asm volatile("cld\n\trep\n\tinsb" : + "=D" (dummy1), "=c" (dummy2) : + "d" (port), "0" (addr), "1" (cnt) : + "memory"); +} + +#define inw(port) \ + (/* CONSTCOND */ __use_immediate_port(port) ? __inwc(port) : __inw(port)) + +static __inline u_int16_t +__inwc(unsigned port) +{ + u_int16_t data; + __asm volatile("inw %w1,%0" : "=a" (data) : "id" (port)); + return data; +} + +static __inline u_int16_t +__inw(unsigned port) +{ + u_int16_t data; + __asm volatile("inw %w1,%0" : "=a" (data) : "d" (port)); + return data; +} + +static __inline void +insw(unsigned port, void *addr, int cnt) +{ + void *dummy1; + int dummy2; + __asm volatile("cld\n\trep\n\tinsw" : + "=D" (dummy1), "=c" (dummy2) : + "d" (port), "0" (addr), "1" (cnt) : + "memory"); +} + +#define inl(port) \ + (/* CONSTCOND */ __use_immediate_port(port) ? __inlc(port) : __inl(port)) + +static __inline u_int32_t +__inlc(unsigned port) +{ + u_int32_t data; + __asm volatile("inl %w1,%0" : "=a" (data) : "id" (port)); + return data; +} + +static __inline u_int32_t +__inl(unsigned port) +{ + u_int32_t data; + __asm volatile("inl %w1,%0" : "=a" (data) : "d" (port)); + return data; +} + +static __inline void +insl(unsigned port, void *addr, int cnt) +{ + void *dummy1; + int dummy2; + __asm volatile("cld\n\trep\n\tinsl" : + "=D" (dummy1), "=c" (dummy2) : + "d" (port), "0" (addr), "1" (cnt) : + "memory"); +} + +#define outb(port, data) \ + (/* CONSTCOND */__use_immediate_port(port) ? __outbc(port, data) : \ + __outb(port, data)) + +static __inline void +__outbc(unsigned port, u_int8_t data) +{ + __asm volatile("outb %0,%w1" : : "a" (data), "id" (port)); +} + +static __inline void +__outb(unsigned port, u_int8_t data) +{ + __asm volatile("outb %0,%w1" : : "a" (data), "d" (port)); +} + +static __inline void +outsb(unsigned port, const void *addr, int cnt) +{ + void *dummy1; + int dummy2; + __asm volatile("cld\n\trep\n\toutsb" : + "=S" (dummy1), "=c" (dummy2) : + "d" (port), "0" (addr), "1" (cnt)); +} + +#define outw(port, data) \ + (/* CONSTCOND */ __use_immediate_port(port) ? __outwc(port, data) : \ + __outw(port, data)) + +static __inline void +__outwc(unsigned port, u_int16_t data) +{ + __asm volatile("outw %0,%w1" : : "a" (data), "id" (port)); +} + +static __inline void +__outw(unsigned port, u_int16_t data) +{ + __asm volatile("outw %0,%w1" : : "a" (data), "d" (port)); +} + +static __inline void +outsw(unsigned port, const void *addr, int cnt) +{ + void *dummy1; + int dummy2; + __asm volatile("cld\n\trep\n\toutsw" : + "=S" (dummy1), "=c" (dummy2) : + "d" (port), "0" (addr), "1" (cnt)); +} + +#define outl(port, data) \ + (/* CONSTCOND */ __use_immediate_port(port) ? __outlc(port, data) : \ + __outl(port, data)) + +static __inline void +__outlc(unsigned port, u_int32_t data) +{ + __asm volatile("outl %0,%w1" : : "a" (data), "id" (port)); +} + +static __inline void +__outl(unsigned port, u_int32_t data) +{ + __asm volatile("outl %0,%w1" : : "a" (data), "d" (port)); +} + +static __inline void +outsl(unsigned port, const void *addr, int cnt) +{ + void *dummy1; + int dummy2; + __asm volatile("cld\n\trep\n\toutsl" : + "=S" (dummy1), "=c" (dummy2) : + "d" (port), "0" (addr), "1" (cnt)); +} + +#endif /* _X86_PIO_H_ */