146 lines
3.0 KiB
C++
146 lines
3.0 KiB
C++
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtoskrnl/hl/i686/ioport.cc
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* DESCRIPTION: I/O port access routines for i686 platform
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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*/
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#include <xtos.hh>
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/**
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* Reads the 8-bit data from the specified I/O port.
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*
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* @param Port
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* Specifies the address to read from, in the range of 0-0xFFFF.
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*
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* @return The value read from the port.
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*
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* @since XT 1.0
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*/
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XTCDECL
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UCHAR
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HL::IoPort::ReadPort8(IN USHORT Port)
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{
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UCHAR Value;
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__asm__ volatile("inb %1, %0"
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: "=a" (Value)
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: "Nd" (Port));
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return Value;
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}
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/**
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* Reads the 16-bit data from the specified I/O port.
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*
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* @param Port
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* Specifies the address to read from, in the range of 0-0xFFFF.
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*
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* @return The value read from the port.
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*
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* @since XT 1.0
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*/
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XTCDECL
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USHORT
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HL::IoPort::ReadPort16(IN USHORT Port)
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{
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USHORT Value;
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__asm__ volatile("inw %1, %0"
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: "=a" (Value)
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: "Nd" (Port));
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return Value;
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}
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/**
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* Reads the 32-bit data from the specified I/O port.
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*
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* @param Port
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* Specifies the address to read from, in the range of 0-0xFFFF.
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*
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* @return The value read from the port.
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*
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* @since XT 1.0
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*/
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XTCDECL
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ULONG
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HL::IoPort::ReadPort32(IN USHORT Port)
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{
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ULONG Value;
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__asm__ volatile("inl %1, %0"
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: "=a" (Value)
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: "Nd" (Port));
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return Value;
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}
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/**
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* Writes the 8-bit data to the specified I/O port.
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*
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* @param Port
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* Specifies the address to write to, in the range of 0-0xFFFF.
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*
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* @param Value
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* Supplies the value to write.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTCDECL
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VOID
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HL::IoPort::WritePort8(IN USHORT Port,
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IN UCHAR Value)
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{
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__asm__ volatile("outb %0, %1"
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:
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: "a" (Value),
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"Nd" (Port));
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}
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/**
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* Writes the 16-bit data to the specified I/O port.
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*
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* @param Port
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* Specifies the address to write to, in the range of 0-0xFFFF.
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*
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* @param Value
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* Supplies the value to write.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTCDECL
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VOID
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HL::IoPort::WritePort16(IN USHORT Port,
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IN USHORT Value)
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{
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__asm__ volatile("outw %0, %1"
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:
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: "a" (Value),
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"Nd" (Port));
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}
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/**
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* Writes the 32-bit data to the specified I/O port.
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*
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* @param Port
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* Specifies the address to write to, in the range of 0-0xFFFF.
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*
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* @param Value
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* Supplies the value to write.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTCDECL
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VOID
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HL::IoPort::WritePort32(IN USHORT Port,
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IN ULONG Value)
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{
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__asm__ volatile("outl %0, %1"
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:
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: "a" (Value),
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"Nd" (Port));
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}
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