77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
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/** @file
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Serial I/O Port library functions with no library constructor/destructor
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Copyright (c) 2006, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name: SerialPortLib.h
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**/
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#ifndef __SERIAL_PORT_LIB__
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#define __SERIAL_PORT_LIB__
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/**
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Programmed hardware of Serial port.
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@return Status of Serial Port Device initialization.
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**/
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EFI_STATUS
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EFIAPI
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SerialPortInitialize (
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VOID
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);
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/**
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Write data to serial device.
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If the buffer is NULL, then return 0;
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if NumberOfBytes is zero, then return 0.
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@param Buffer Point of data buffer which need to be writed.
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@param NumberOfBytes Number of output bytes which are cached in Buffer.
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@retval 0 Write data failed.
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@retval !0 Actual number of bytes writed to serial device.
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**/
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UINTN
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EFIAPI
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SerialPortWrite (
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IN UINT8 *Buffer,
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IN UINTN NumberOfBytes
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);
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/**
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Read data from serial device and save the datas in buffer.
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If the buffer is NULL, then return zero;
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if NumberOfBytes is zero, then return zero.
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@param Buffer Point of data buffer which need to be writed.
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@param NumberOfBytes Number of output bytes which are cached in Buffer.
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@retval 0 Read data failed.
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@retval !0 Aactual number of bytes read from serial device.
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**/
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UINTN
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EFIAPI
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SerialPortRead (
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OUT UINT8 *Buffer,
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IN UINTN NumberOfBytes
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);
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#endif
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