41 lines
1.0 KiB
C++
41 lines
1.0 KiB
C++
/*
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* I/O Ports
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*
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* Copyright (C) 2005-2009, Udo Steinberg <udo@hypervisor.org>
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*
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* This file is part of the NOVA microhypervisor.
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*
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* NOVA is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* NOVA is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License version 2 for more details.
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*/
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#pragma once
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#include "compiler.h"
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class Io
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{
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public:
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template <typename T>
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ALWAYS_INLINE
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static inline unsigned in (unsigned port)
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{
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T val;
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asm volatile ("in %w1, %0" : "=a" (val) : "Nd" (port));
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return val;
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}
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template <typename T>
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ALWAYS_INLINE
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static inline void out (unsigned port, T val)
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{
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asm volatile ("out %0, %w1" : : "a" (val), "Nd" (port));
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}
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};
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