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| author | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-05-27 21:10:18 +0000 |
|---|---|---|
| committer | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-05-27 21:10:18 +0000 |
| commit | 49ba9447c92d6fca214476381107a180d08e59d1 (patch) | |
| tree | 08bcd066ffa49329f29457b36f6ed328d9b1112f /OvmfPkg/PlatformPei/Cmos.c | |
| parent | a1f11f7547b43a6b86f6925cb8ab3f836b2d5dae (diff) | |
| download | edk2-49ba9447c92d6fca214476381107a180d08e59d1.tar.gz edk2-49ba9447c92d6fca214476381107a180d08e59d1.tar.bz2 edk2-49ba9447c92d6fca214476381107a180d08e59d1.zip | |
Add initial version of Open Virtual Machine Firmware (OVMF) platform.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8398 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/PlatformPei/Cmos.c')
| -rw-r--r-- | OvmfPkg/PlatformPei/Cmos.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/OvmfPkg/PlatformPei/Cmos.c b/OvmfPkg/PlatformPei/Cmos.c new file mode 100644 index 0000000000..92df4a77e6 --- /dev/null +++ b/OvmfPkg/PlatformPei/Cmos.c @@ -0,0 +1,64 @@ +/** @file
+ PC/AT CMOS access routines
+
+ Copyright (c) 2006 - 2009, Intel Corporation<BR>
+ All rights reserved. This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+
+#include "Cmos.h"
+#include "Library/IoLib.h"
+
+/**
+ Reads 8-bits of CMOS data.
+
+ Reads the 8-bits of CMOS data at the location specified by Index.
+ The 8-bit read value is returned.
+
+ @param Index The CMOS location to read.
+
+ @return The value read.
+
+**/
+UINT8
+EFIAPI
+CmosRead8 (
+ IN UINTN Index
+ )
+{
+ IoWrite8 (0x70, (UINT8) Index);
+ return IoRead8 (0x71);
+}
+
+
+/**
+ Writes 8-bits of CMOS data.
+
+ Writes 8-bits of CMOS data to the location specified by Index
+ with the value specified by Value and returns Value.
+
+ @param Index The CMOS location to write.
+ @param Value The value to write to CMOS.
+
+ @return The value written to CMOS.
+
+**/
+UINT8
+EFIAPI
+CmosWrite8 (
+ IN UINTN Index,
+ IN UINT8 Value
+ )
+{
+ IoWrite8 (0x70, (UINT8) Index);
+ IoWrite8 (0x71, Value);
+ return Value;
+}
+
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