464181b01d
Split port API implementation into separate io_port_session_support.cc file, so that base-sel4 may implement this part alternatively. Issue #2044
82 lines
1.8 KiB
C++
82 lines
1.8 KiB
C++
/*
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* \brief Core implementation of the IO_PORT session interface
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* \author Christian Helmuth
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* \date 2007-04-17
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*/
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/*
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* Copyright (C) 2007-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* core includes */
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#include <io_port_session_component.h>
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using namespace Genode;
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/**************
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** Port API **
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**************/
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unsigned char Io_port_session_component::inb(unsigned short address)
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{
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/* check boundaries */
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if (!_in_bounds(address, sizeof(unsigned char))) return 0;
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unsigned char v;
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asm volatile ("inb %w1, %b0" : "=a" (v) : "Nd" (address));
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return v;
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}
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unsigned short Io_port_session_component::inw(unsigned short address)
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{
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/* check boundaries */
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if (!_in_bounds(address, sizeof(unsigned short))) return 0;
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unsigned short v;
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asm volatile ("inw %w1, %w0" : "=a" (v) : "Nd" (address));
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return v;
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}
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unsigned Io_port_session_component::inl(unsigned short address)
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{
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/* check boundaries */
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if (!_in_bounds(address, sizeof(unsigned))) return 0;
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unsigned v;
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asm volatile ("inl %w1, %0" : "=a" (v) : "Nd" (address));
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return v;
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}
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void Io_port_session_component::outb(unsigned short address, unsigned char value)
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{
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/* check boundaries */
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if (!_in_bounds(address, sizeof(unsigned char))) return;
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asm volatile ("outb %b0, %w1" : : "a" (value), "Nd" (address));
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}
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void Io_port_session_component::outw(unsigned short address, unsigned short value)
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{
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/* check boundaries */
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if (!_in_bounds(address, sizeof(unsigned short))) return;
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asm volatile ("outw %w0, %w1" : : "a" (value), "Nd" (address));
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}
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void Io_port_session_component::outl(unsigned short address, unsigned value)
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{
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/* check boundaries */
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if (!_in_bounds(address, sizeof(unsigned))) return;
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asm volatile ("outl %0, %w1" : : "a" (value), "Nd" (address));
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}
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