forked from Archive/PX4-Autopilot
149 lines
4.2 KiB
C
149 lines
4.2 KiB
C
/****************************************************************************
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* arch/x86/include/i486/io.h
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* arch/chip/io.h
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* 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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****************************************************************************/
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/* This file should never be included directed but, rather, only indirectly
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* through arch/io.h
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*/
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#ifndef __ARCH_X86_INCLUDE_I486_IO_H
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#define __ARCH_X86_INCLUDE_I486_IO_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdint.h>
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Types
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****************************************************************************/
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#ifndef __ASSEMBLY__
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/****************************************************************************
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* Inline functions
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****************************************************************************/
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/* Standard x86 Port I/O */
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static inline void outb(uint8_t regval, uint16_t port)
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{
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asm volatile(
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"\toutb %0,%1\n"
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:
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: "a" (regval), "dN" (port)
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);
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}
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static inline uint8_t inb(uint16_t port)
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{
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uint8_t regval;
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asm volatile(
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"\tinb %1,%0\n"
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: "=a" (regval)
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: "dN" (port)
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);
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return regval;
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}
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static inline void outw(uint16_t regval, uint16_t port)
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{
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asm volatile(
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"\toutw %0,%1\n"
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:
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: "a" (regval), "dN" (port)
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);
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}
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static inline uint16_t inw(uint16_t port)
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{
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uint16_t regval;
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asm volatile(
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"\tinw %1,%0\n"
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: "=a" (regval)
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: "dN" (port)
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);
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return regval;
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}
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static inline void outl(uint32_t regval, uint16_t port)
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{
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asm volatile(
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"\toutl %0,%1\n"
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:
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: "a" (regval), "dN" (port)
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);
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}
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static inline uint32_t inl(uint16_t port)
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{
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uint32_t regval;
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asm volatile(
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"\tinl %1,%0\n"
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: "=a" (regval)
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: "dN" (port)
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);
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return regval;
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}
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_X86_INCLUDE_I486_IO_H */
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