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git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/BaseIoLibIntrinsic/IoLib.c
2 Common I/O Library routines.
4 Copyright (c) 2006, Intel Corporation<BR>
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.
16 // Include common header file for this module.
18 #include "BaseIoLibIntrinsicInternal.h"
21 Reads a 64-bit I/O port.
23 Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned.
24 This function must guarantee that all I/O read and write operations are
27 If 64-bit I/O port operations are not supported, then ASSERT().
29 @param Port The I/O port to read.
31 @return The value read.
45 Writes a 64-bit I/O port.
47 Writes the 64-bit I/O port specified by Port with the value specified by Value
48 and returns Value. This function must guarantee that all I/O read and write
49 operations are serialized.
51 If 64-bit I/O port operations are not supported, then ASSERT().
53 @param Port The I/O port to write.
54 @param Value The value to write to the I/O port.
56 @return The value written the I/O port.