Revision: 13915
http://edk2.svn.sourceforge.net/edk2/?rev=13915&view=rev
Author: vanjeff
Date: 2012-11-02 02:33:07 +0000 (Fri, 02 Nov 2012)
Log Message:
-----------
Sync patch r13901 from main trunk.
Raise TPL to high to disable CPU interrupt before 8259 legacy base vector is
changed, then restore TPL level at last when 8259 initialization is done.
Revision Links:
--------------
http://edk2.svn.sourceforge.net/edk2/?rev=13901&view=rev
Modified Paths:
--------------
branches/UDK2010.SR1/PcAtChipsetPkg/8259InterruptControllerDxe/8259.c
Modified: branches/UDK2010.SR1/PcAtChipsetPkg/8259InterruptControllerDxe/8259.c
===================================================================
--- branches/UDK2010.SR1/PcAtChipsetPkg/8259InterruptControllerDxe/8259.c
2012-11-02 02:25:17 UTC (rev 13914)
+++ branches/UDK2010.SR1/PcAtChipsetPkg/8259InterruptControllerDxe/8259.c
2012-11-02 02:33:07 UTC (rev 13915)
@@ -1,7 +1,7 @@
/** @file
This contains the installation function for the driver.
-Copyright (c) 2005 - 2011, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2005 - 2012, Intel Corporation. All rights reserved.<BR>
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
@@ -123,8 +123,10 @@
IN UINT8 SlaveBase
)
{
- UINT8 Mask;
+ UINT8 Mask;
+ EFI_TPL OriginalTpl;
+ OriginalTpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
//
// Set vector base for slave PIC
//
@@ -211,6 +213,8 @@
IoWrite8 (LEGACY_8259_CONTROL_REGISTER_SLAVE, LEGACY_8259_EOI);
IoWrite8 (LEGACY_8259_CONTROL_REGISTER_MASTER, LEGACY_8259_EOI);
+
+ gBS->RestoreTPL (OriginalTpl);
return EFI_SUCCESS;
}
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