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git.proxmox.com Git - mirror_edk2.git/blob - EdkModulePkg/Library/EdkSerialPortLibNull/SerialPortLibNull.c
2 Serial I/O Port library functions with no library constructor/destructor
4 Copyright (c) 2006, Intel Corporation
5 All rights reserved. This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13 Module Name: SerialPortLibNull.c
19 Programmed hardware of Serial port.
21 @return Always return EFI_UNSUPPORTED.
26 SerialPortInitialize (
30 return EFI_UNSUPPORTED
;
34 Write data to serial device.
36 If the buffer is NULL, then ASSERT();
37 if NumberOfBytes is zero, then ASSERT().
39 @param Buffer Point of data buffer which need to be writed.
40 @param NumberOfBytes Number of output bytes which are cached in Buffer.
42 @retval 0 Write data failed.
43 @retval !0 Actual number of bytes writed to serial device.
50 IN UINTN NumberOfBytes
53 ASSERT (NULL
!= Buffer
);
54 ASSERT (0 != NumberOfBytes
);
61 Read data from serial device and save the datas in buffer.
63 If the buffer is NULL, then ASSERT();
64 if NumberOfBytes is zero, then ASSERT().
66 @param Buffer Point of data buffer which need to be writed.
67 @param NumberOfBytes Number of output bytes which are cached in Buffer.
69 @retval 0 Read data failed.
70 @retval !0 Aactual number of bytes read from serial device.
77 IN UINTN NumberOfBytes
80 ASSERT (NULL
!= Buffer
);
81 ASSERT (0 != NumberOfBytes
);