Revision: 16457
http://sourceforge.net/p/edk2/code/16457
Author: lgao4
Date: 2014-12-01 08:17:51 +0000 (Mon, 01 Dec 2014)
Log Message:
-----------
PerformancePkg: Update comments on TscTimerLib
TscTimerLib is a sample implementation that depends on chipset ACPI timer.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <[email protected]>
Reviewed-by: Star Zeng <[email protected]>
Modified Paths:
--------------
trunk/edk2/PerformancePkg/Library/TscTimerLib/BaseTscTimerLib.inf
trunk/edk2/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.inf
trunk/edk2/PerformancePkg/Library/TscTimerLib/PeiTscTimerLib.inf
Modified: trunk/edk2/PerformancePkg/Library/TscTimerLib/BaseTscTimerLib.inf
===================================================================
--- trunk/edk2/PerformancePkg/Library/TscTimerLib/BaseTscTimerLib.inf
2014-12-01 01:05:05 UTC (rev 16456)
+++ trunk/edk2/PerformancePkg/Library/TscTimerLib/BaseTscTimerLib.inf
2014-12-01 08:17:51 UTC (rev 16457)
@@ -4,6 +4,10 @@
# Note: There will be 1ms penalty to get TSC frequency every time
# by waiting for 3579 clocks of the ACPI timer, or 1ms.
#
+# Note: This library is a sample implementation that depends on chipset ACPI
timer.
+# It may not work on new generation chipset. PcAtChipsetPkg AcpiTimerLib is
+# the generic timer library that can replace this one.
+#
# A version of the Timer Library using the processor's TSC.
# The time stamp counter in newer processors may support an enhancement,
referred to as invariant TSC.
# The invariant TSC runs at a constant rate in all ACPI P-, C-. and T-states.
@@ -11,7 +15,7 @@
# TSC reads are much more efficient and do not incur the overhead associated
with a ring transition or
# access to a platform resource.
#
-# Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2009 - 2014, 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
Modified: trunk/edk2/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.inf
===================================================================
--- trunk/edk2/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.inf
2014-12-01 01:05:05 UTC (rev 16456)
+++ trunk/edk2/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.inf
2014-12-01 08:17:51 UTC (rev 16457)
@@ -1,6 +1,10 @@
## @file
# Dxe Timer Library which uses the Time Stamp Counter in the processor.
#
+# Note: This library is a sample implementation that depends on chipset ACPI
timer.
+# It may not work on new generation chipset. PcAtChipsetPkg AcpiTimerLib is
+# the generic timer library that can replace this one.
+#
# A version of the Timer Library using the processor's TSC.
# The time stamp counter in newer processors may support an enhancement,
referred to as invariant TSC.
# The invariant TSC runs at a constant rate in all ACPI P-, C-. and T-states.
@@ -8,7 +12,7 @@
# TSC reads are much more efficient and do not incur the overhead associated
with a ring transition or
# access to a platform resource.
#
-# Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2009 - 2014, 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
Modified: trunk/edk2/PerformancePkg/Library/TscTimerLib/PeiTscTimerLib.inf
===================================================================
--- trunk/edk2/PerformancePkg/Library/TscTimerLib/PeiTscTimerLib.inf
2014-12-01 01:05:05 UTC (rev 16456)
+++ trunk/edk2/PerformancePkg/Library/TscTimerLib/PeiTscTimerLib.inf
2014-12-01 08:17:51 UTC (rev 16457)
@@ -1,6 +1,10 @@
## @file
# Pei Timer Library which uses the Time Stamp Counter in the processor.
#
+# Note: This library is a sample implementation that depends on chipset ACPI
timer.
+# It may not work on new generation chipset. PcAtChipsetPkg AcpiTimerLib is
+# the generic timer library that can replace this one.
+#
# A version of the Timer Library using the processor's TSC.
# The time stamp counter in newer processors may support an enhancement,
referred to as invariant TSC.
# The invariant TSC runs at a constant rate in all ACPI P-, C-. and T-states.
@@ -8,7 +12,7 @@
# TSC reads are much more efficient and do not incur the overhead associated
with a ring transition or
# access to a platform resource.
#
-# Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2009 - 2014, 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
------------------------------------------------------------------------------
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