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148 lines
4.2 KiB
148 lines
4.2 KiB
/**************************************************************************** |
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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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