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/*-
* Copyright (c) 1993 The Regents of the University of California.
* 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.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
*/
/*
* Portions copyright (c) 2010, Intel Corporation
*/
#ifndef __IO_H__
#define __IO_H__
/* from:
* $FreeBSD: src/sys/i386/include/cpufunc.h,v 1.158 2010/01/01 20:55:11 obrien Exp $
*/
/* modified to use tboot's types */
#define readb(va) (*(volatile uint8_t *) (va))
#define readw(va) (*(volatile uint16_t *) (va))
#define readl(va) (*(volatile uint32_t *) (va))
#define writeb(va, d) (*(volatile uint8_t *) (va) = (d))
#define writew(va, d) (*(volatile uint16_t *) (va) = (d))
#define writel(va, d) (*(volatile uint32_t *) (va) = (d))
static inline uint8_t inb(uint16_t port)
{
uint8_t data;
__asm volatile("inb %w1, %0" : "=a" (data) : "Nd" (port));
return (data);
}
static inline uint16_t inw(uint16_t port)
{
uint16_t data;
__asm volatile("inw %w1, %0" : "=a" (data) : "Nd" (port));
return (data);
}
static inline uint32_t inl(uint16_t port)
{
uint32_t data;
__asm volatile("inl %w1, %0" : "=a" (data) : "Nd" (port));
return (data);
}
static inline void outb(uint16_t port, uint8_t data)
{
__asm __volatile("outb %0, %w1" : : "a" (data), "Nd" (port));
}
static inline void outw(uint16_t port, uint16_t data)
{
__asm volatile("outw %0, %w1" : : "a" (data), "Nd" (port));
}
static inline void outl(uint16_t port, uint32_t data)
{
__asm volatile("outl %0, %w1" : : "a" (data), "Nd" (port));
}
#endif /* __IO_H__ */
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