* [PATCH v2] PcAtChipsetPkg: Add PeiAcpiTimerLib to save PerformanceCounterFrequency in HOB
@ 2018-01-23 2:24 Liming Gao
2018-01-26 5:57 ` Zeng, Star
0 siblings, 1 reply; 3+ messages in thread
From: Liming Gao @ 2018-01-23 2:24 UTC (permalink / raw)
To: edk2-devel; +Cc: Star Zeng
In V2:
1) Update PeiAcpiTimerLib base name to PeiAcpiTimerLib
2) Update PeiAcpiTimerLib to add the missing constructor to enable ACPI IO space
3) Update DxeAcpiTimerLib to cache frequency in constructor.
PeiAcpiTimerLib caches PerformanceCounterFrequency in HOB, then Pei and Dxe
AcpiTimerLib can share the same PerformanceCounterFrequency.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
---
PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c | 4 +-
.../Library/AcpiTimerLib/DxeAcpiTimerLib.c | 57 +++++++++++++++++-
.../Library/AcpiTimerLib/DxeAcpiTimerLib.inf | 7 ++-
.../Library/AcpiTimerLib/PeiAcpiTimerLib.c | 68 ++++++++++++++++++++++
.../Library/AcpiTimerLib/PeiAcpiTimerLib.inf | 56 ++++++++++++++++++
.../Library/AcpiTimerLib/PeiAcpiTimerLib.uni | 23 ++++++++
PcAtChipsetPkg/PcAtChipsetPkg.dsc | 4 +-
7 files changed, 211 insertions(+), 8 deletions(-)
create mode 100644 PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.c
create mode 100644 PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
create mode 100644 PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.uni
diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c b/PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c
index 792781a33f..2f3cb4bca4 100644
--- a/PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c
+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c
@@ -1,7 +1,7 @@
/** @file
ACPI Timer implements one instance of Timer Library.
- Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2013 - 2018, 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
@@ -21,6 +21,8 @@
#include <Library/DebugLib.h>
#include <IndustryStandard/Acpi.h>
+GUID mFrequencyHobGuid = { 0x3fca54f6, 0xe1a2, 0x4b20, { 0xbe, 0x76, 0x92, 0x6b, 0x4b, 0x48, 0xbf, 0xaa }};
+
/**
Internal function to retrieves the 64-bit frequency in Hz.
diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c b/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c
index b141c680fb..67e18a1360 100644
--- a/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c
+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c
@@ -12,9 +12,27 @@
**/
-#include <Base.h>
+#include <PiDxe.h>
#include <Library/TimerLib.h>
#include <Library/BaseLib.h>
+#include <Library/HobLib.h>
+
+extern GUID mFrequencyHobGuid;
+
+/**
+ The constructor function enables ACPI IO space.
+
+ If ACPI I/O space not enabled, this function will enable it.
+ It will always return RETURN_SUCCESS.
+
+ @retval EFI_SUCCESS The constructor always returns RETURN_SUCCESS.
+
+**/
+RETURN_STATUS
+EFIAPI
+AcpiTimerLibConstructor (
+ VOID
+ );
/**
Calculate TSC frequency.
@@ -54,8 +72,41 @@ InternalGetPerformanceCounterFrequency (
VOID
)
{
- if (mPerformanceCounterFrequency == 0) {
+ return mPerformanceCounterFrequency;
+}
+
+/**
+ The constructor function enables ACPI IO space, and caches PerformanceCounterFrequency.
+
+ @param ImageHandle The firmware allocated handle for the EFI image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The constructor always returns RETURN_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+DxeAcpiTimerLibConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_HOB_GUID_TYPE *GuidHob;
+
+ //
+ // Enable ACPI IO space.
+ //
+ AcpiTimerLibConstructor ();
+
+ //
+ // Initialize PerformanceCounterFrequency
+ //
+ GuidHob = GetFirstGuidHob (&mFrequencyHobGuid);
+ if (GuidHob != NULL) {
+ mPerformanceCounterFrequency = *(UINT64*)GET_GUID_HOB_DATA (GuidHob);
+ } else {
mPerformanceCounterFrequency = InternalCalculateTscFrequency ();
}
- return mPerformanceCounterFrequency;
+
+ return EFI_SUCCESS;
}
diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf b/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
index 2c1cc7d33c..601041c801 100644
--- a/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
@@ -7,7 +7,7 @@
# Note: The implementation uses the lower 24-bits of the ACPI timer and
# is compatible with both 24-bit and 32-bit ACPI timers.
#
-# Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2013 - 2018, 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
@@ -22,10 +22,10 @@
INF_VERSION = 0x00010005
BASE_NAME = DxeAcpiTimerLib
FILE_GUID = E624B98C-845A-4b94-9B50-B20475D552B9
- MODULE_TYPE = BASE
+ MODULE_TYPE = DXE_DRIVER
VERSION_STRING = 1.0
LIBRARY_CLASS = TimerLib|DXE_CORE DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SMM_DRIVER UEFI_APPLICATION UEFI_DRIVER SMM_CORE
- CONSTRUCTOR = AcpiTimerLibConstructor
+ CONSTRUCTOR = DxeAcpiTimerLibConstructor
MODULE_UNI_FILE = DxeAcpiTimerLib.uni
[Sources]
@@ -42,6 +42,7 @@
PciLib
IoLib
DebugLib
+ HobLib
[Pcd]
gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciBusNumber ## CONSUMES
diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.c b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.c
new file mode 100644
index 0000000000..a4ed6a4434
--- /dev/null
+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.c
@@ -0,0 +1,68 @@
+/** @file
+ ACPI Timer implements one instance of Timer Library.
+
+ Copyright (c) 2013 - 2018, 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
+ 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 <PiPei.h>
+#include <Library/TimerLib.h>
+#include <Library/BaseLib.h>
+#include <Library/HobLib.h>
+
+extern GUID mFrequencyHobGuid;
+
+/**
+ Calculate TSC frequency.
+
+ The TSC counting frequency is determined by comparing how far it counts
+ during a 101.4 us period as determined by the ACPI timer.
+ The ACPI timer is used because it counts at a known frequency.
+ The TSC is sampled, followed by waiting 363 counts of the ACPI timer,
+ or 101.4 us. The TSC is then sampled again. The difference multiplied by
+ 9861 is the TSC frequency. There will be a small error because of the
+ overhead of reading the ACPI timer. An attempt is made to determine and
+ compensate for this error.
+
+ @return The number of TSC counts per second.
+
+**/
+UINT64
+InternalCalculateTscFrequency (
+ VOID
+ );
+
+/**
+ Internal function to retrieves the 64-bit frequency in Hz.
+
+ Internal function to retrieves the 64-bit frequency in Hz.
+
+ @return The frequency in Hz.
+
+**/
+UINT64
+InternalGetPerformanceCounterFrequency (
+ VOID
+ )
+{
+ UINT64 *PerformanceCounterFrequency;
+ EFI_HOB_GUID_TYPE *GuidHob;
+
+ PerformanceCounterFrequency = NULL;
+ GuidHob = GetFirstGuidHob (&mFrequencyHobGuid);
+ if (GuidHob == NULL) {
+ PerformanceCounterFrequency = (UINT64*)BuildGuidHob(&mFrequencyHobGuid, sizeof (*PerformanceCounterFrequency));
+ *PerformanceCounterFrequency = InternalCalculateTscFrequency ();
+ return *PerformanceCounterFrequency;
+ }
+ PerformanceCounterFrequency = (UINT64*)GET_GUID_HOB_DATA (GuidHob);
+
+ return *PerformanceCounterFrequency;
+}
diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
new file mode 100644
index 0000000000..1d8c95a3ec
--- /dev/null
+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
@@ -0,0 +1,56 @@
+## @file
+# PEI ACPI Timer Library
+#
+# Provides basic timer support using the ACPI timer hardware. The performance
+# counter features are provided by the processors time stamp counter.
+#
+# Note: The implementation uses the lower 24-bits of the ACPI timer and
+# is compatible with both 24-bit and 32-bit ACPI timers.
+#
+# Copyright (c) 2013 - 2018, 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
+# 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.
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = PeiAcpiTimerLib
+ FILE_GUID = 3FCA54F6-E1A2-4B20-BE76-926B4B48BFAA
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = TimerLib|PEI_CORE PEIM
+ CONSTRUCTOR = AcpiTimerLibConstructor
+ MODULE_UNI_FILE = PeiAcpiTimerLib.uni
+
+[Sources]
+ AcpiTimerLib.c
+ PeiAcpiTimerLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ PcAtChipsetPkg/PcAtChipsetPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ PcdLib
+ PciLib
+ IoLib
+ DebugLib
+ HobLib
+
+[Pcd]
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciBusNumber ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciDeviceNumber ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciFunctionNumber ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciEnableRegisterOffset ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoBarEnableMask ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciBarRegisterOffset ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPortBaseAddress ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiPm1TmrOffset ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPortBaseAddressMask ## CONSUMES
diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.uni b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.uni
new file mode 100644
index 0000000000..668161b14a
--- /dev/null
+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.uni
@@ -0,0 +1,23 @@
+// /** @file
+// PEI ACPI Timer Library
+//
+// Provides basic timer support using the ACPI timer hardware. The performance
+// counter features are provided by the processors time stamp counter.
+//
+// Copyright (c) 2018, 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
+// 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.
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT #language en-US "ACPI Timer Library"
+
+#string STR_MODULE_DESCRIPTION #language en-US "Provides basic timer support using the ACPI timer hardware."
+
diff --git a/PcAtChipsetPkg/PcAtChipsetPkg.dsc b/PcAtChipsetPkg/PcAtChipsetPkg.dsc
index b740f00e63..2395e9cf26 100644
--- a/PcAtChipsetPkg/PcAtChipsetPkg.dsc
+++ b/PcAtChipsetPkg/PcAtChipsetPkg.dsc
@@ -1,7 +1,7 @@
## @file
# PC/AT Chipset Package
#
-# Copyright (c) 2007 - 2016, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2007 - 2018, 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
@@ -46,6 +46,7 @@
IoApicLib|PcAtChipsetPkg/Library/BaseIoApicLib/BaseIoApicLib.inf
LocalApicLib|UefiCpuPkg/Library/BaseXApicLib/BaseXApicLib.inf
ReportStatusCodeLib|MdePkg/Library/BaseReportStatusCodeLibNull/BaseReportStatusCodeLibNull.inf
+ HobLib|MdePkg/Library/DxeHobLib/DxeHobLib.inf
[Components]
PcAtChipsetPkg/8254TimerDxe/8254Timer.inf
@@ -57,6 +58,7 @@
PcAtChipsetPkg/Library/BaseIoApicLib/BaseIoApicLib.inf
PcAtChipsetPkg/Library/AcpiTimerLib/BaseAcpiTimerLib.inf
PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
+ PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeDxe.inf
[BuildOptions]
--
2.11.0.windows.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2] PcAtChipsetPkg: Add PeiAcpiTimerLib to save PerformanceCounterFrequency in HOB
2018-01-23 2:24 [PATCH v2] PcAtChipsetPkg: Add PeiAcpiTimerLib to save PerformanceCounterFrequency in HOB Liming Gao
@ 2018-01-26 5:57 ` Zeng, Star
2018-01-31 11:18 ` Gao, Liming
0 siblings, 1 reply; 3+ messages in thread
From: Zeng, Star @ 2018-01-26 5:57 UTC (permalink / raw)
To: Gao, Liming, edk2-devel@lists.01.org; +Cc: Zeng, Star
Hi Liming,
Reviewed-by: Star Zeng <star.zeng@intel.com>
Two minor comments. Just for your information.
1. Notice the title, it may be too long.
2. In PeiAcpiTimerLib.c, you may need to add ASSERT (PerformanceCounterFrequency != NULL) after BuildGuidHob.
And you can move " PerformanceCounterFrequency = (UINT64*)GET_GUID_HOB_DATA (GuidHob); " to the else condition, then only one "return" is needed.
+ PerformanceCounterFrequency = NULL;
+ GuidHob = GetFirstGuidHob (&mFrequencyHobGuid);
+ if (GuidHob == NULL) {
+ PerformanceCounterFrequency = (UINT64*)BuildGuidHob(&mFrequencyHobGuid, sizeof (*PerformanceCounterFrequency));
+ *PerformanceCounterFrequency = InternalCalculateTscFrequency ();
+ return *PerformanceCounterFrequency;
+ }
+ PerformanceCounterFrequency = (UINT64*)GET_GUID_HOB_DATA (GuidHob);
+
+ return *PerformanceCounterFrequency;
+}
Thanks,
Star
-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Liming Gao
Sent: Tuesday, January 23, 2018 10:24 AM
To: edk2-devel@lists.01.org
Cc: Zeng, Star <star.zeng@intel.com>
Subject: [edk2] [PATCH v2] PcAtChipsetPkg: Add PeiAcpiTimerLib to save PerformanceCounterFrequency in HOB
In V2:
1) Update PeiAcpiTimerLib base name to PeiAcpiTimerLib
2) Update PeiAcpiTimerLib to add the missing constructor to enable ACPI IO space
3) Update DxeAcpiTimerLib to cache frequency in constructor.
PeiAcpiTimerLib caches PerformanceCounterFrequency in HOB, then Pei and Dxe
AcpiTimerLib can share the same PerformanceCounterFrequency.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
---
PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c | 4 +-
.../Library/AcpiTimerLib/DxeAcpiTimerLib.c | 57 +++++++++++++++++-
.../Library/AcpiTimerLib/DxeAcpiTimerLib.inf | 7 ++-
.../Library/AcpiTimerLib/PeiAcpiTimerLib.c | 68 ++++++++++++++++++++++
.../Library/AcpiTimerLib/PeiAcpiTimerLib.inf | 56 ++++++++++++++++++
.../Library/AcpiTimerLib/PeiAcpiTimerLib.uni | 23 ++++++++
PcAtChipsetPkg/PcAtChipsetPkg.dsc | 4 +-
7 files changed, 211 insertions(+), 8 deletions(-)
create mode 100644 PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.c
create mode 100644 PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
create mode 100644 PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.uni
diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c b/PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c
index 792781a33f..2f3cb4bca4 100644
--- a/PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c
+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c
@@ -1,7 +1,7 @@
/** @file
ACPI Timer implements one instance of Timer Library.
- Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2013 - 2018, 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
@@ -21,6 +21,8 @@
#include <Library/DebugLib.h>
#include <IndustryStandard/Acpi.h>
+GUID mFrequencyHobGuid = { 0x3fca54f6, 0xe1a2, 0x4b20, { 0xbe, 0x76, 0x92, 0x6b, 0x4b, 0x48, 0xbf, 0xaa }};
+
/**
Internal function to retrieves the 64-bit frequency in Hz.
diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c b/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c
index b141c680fb..67e18a1360 100644
--- a/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c
+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c
@@ -12,9 +12,27 @@
**/
-#include <Base.h>
+#include <PiDxe.h>
#include <Library/TimerLib.h>
#include <Library/BaseLib.h>
+#include <Library/HobLib.h>
+
+extern GUID mFrequencyHobGuid;
+
+/**
+ The constructor function enables ACPI IO space.
+
+ If ACPI I/O space not enabled, this function will enable it.
+ It will always return RETURN_SUCCESS.
+
+ @retval EFI_SUCCESS The constructor always returns RETURN_SUCCESS.
+
+**/
+RETURN_STATUS
+EFIAPI
+AcpiTimerLibConstructor (
+ VOID
+ );
/**
Calculate TSC frequency.
@@ -54,8 +72,41 @@ InternalGetPerformanceCounterFrequency (
VOID
)
{
- if (mPerformanceCounterFrequency == 0) {
+ return mPerformanceCounterFrequency;
+}
+
+/**
+ The constructor function enables ACPI IO space, and caches PerformanceCounterFrequency.
+
+ @param ImageHandle The firmware allocated handle for the EFI image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The constructor always returns RETURN_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+DxeAcpiTimerLibConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_HOB_GUID_TYPE *GuidHob;
+
+ //
+ // Enable ACPI IO space.
+ //
+ AcpiTimerLibConstructor ();
+
+ //
+ // Initialize PerformanceCounterFrequency
+ //
+ GuidHob = GetFirstGuidHob (&mFrequencyHobGuid);
+ if (GuidHob != NULL) {
+ mPerformanceCounterFrequency = *(UINT64*)GET_GUID_HOB_DATA (GuidHob);
+ } else {
mPerformanceCounterFrequency = InternalCalculateTscFrequency ();
}
- return mPerformanceCounterFrequency;
+
+ return EFI_SUCCESS;
}
diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf b/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
index 2c1cc7d33c..601041c801 100644
--- a/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
@@ -7,7 +7,7 @@
# Note: The implementation uses the lower 24-bits of the ACPI timer and
# is compatible with both 24-bit and 32-bit ACPI timers.
#
-# Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2013 - 2018, 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
@@ -22,10 +22,10 @@
INF_VERSION = 0x00010005
BASE_NAME = DxeAcpiTimerLib
FILE_GUID = E624B98C-845A-4b94-9B50-B20475D552B9
- MODULE_TYPE = BASE
+ MODULE_TYPE = DXE_DRIVER
VERSION_STRING = 1.0
LIBRARY_CLASS = TimerLib|DXE_CORE DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SMM_DRIVER UEFI_APPLICATION UEFI_DRIVER SMM_CORE
- CONSTRUCTOR = AcpiTimerLibConstructor
+ CONSTRUCTOR = DxeAcpiTimerLibConstructor
MODULE_UNI_FILE = DxeAcpiTimerLib.uni
[Sources]
@@ -42,6 +42,7 @@
PciLib
IoLib
DebugLib
+ HobLib
[Pcd]
gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciBusNumber ## CONSUMES
diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.c b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.c
new file mode 100644
index 0000000000..a4ed6a4434
--- /dev/null
+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.c
@@ -0,0 +1,68 @@
+/** @file
+ ACPI Timer implements one instance of Timer Library.
+
+ Copyright (c) 2013 - 2018, 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
+ 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 <PiPei.h>
+#include <Library/TimerLib.h>
+#include <Library/BaseLib.h>
+#include <Library/HobLib.h>
+
+extern GUID mFrequencyHobGuid;
+
+/**
+ Calculate TSC frequency.
+
+ The TSC counting frequency is determined by comparing how far it counts
+ during a 101.4 us period as determined by the ACPI timer.
+ The ACPI timer is used because it counts at a known frequency.
+ The TSC is sampled, followed by waiting 363 counts of the ACPI timer,
+ or 101.4 us. The TSC is then sampled again. The difference multiplied by
+ 9861 is the TSC frequency. There will be a small error because of the
+ overhead of reading the ACPI timer. An attempt is made to determine and
+ compensate for this error.
+
+ @return The number of TSC counts per second.
+
+**/
+UINT64
+InternalCalculateTscFrequency (
+ VOID
+ );
+
+/**
+ Internal function to retrieves the 64-bit frequency in Hz.
+
+ Internal function to retrieves the 64-bit frequency in Hz.
+
+ @return The frequency in Hz.
+
+**/
+UINT64
+InternalGetPerformanceCounterFrequency (
+ VOID
+ )
+{
+ UINT64 *PerformanceCounterFrequency;
+ EFI_HOB_GUID_TYPE *GuidHob;
+
+ PerformanceCounterFrequency = NULL;
+ GuidHob = GetFirstGuidHob (&mFrequencyHobGuid);
+ if (GuidHob == NULL) {
+ PerformanceCounterFrequency = (UINT64*)BuildGuidHob(&mFrequencyHobGuid, sizeof (*PerformanceCounterFrequency));
+ *PerformanceCounterFrequency = InternalCalculateTscFrequency ();
+ return *PerformanceCounterFrequency;
+ }
+ PerformanceCounterFrequency = (UINT64*)GET_GUID_HOB_DATA (GuidHob);
+
+ return *PerformanceCounterFrequency;
+}
diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
new file mode 100644
index 0000000000..1d8c95a3ec
--- /dev/null
+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
@@ -0,0 +1,56 @@
+## @file
+# PEI ACPI Timer Library
+#
+# Provides basic timer support using the ACPI timer hardware. The performance
+# counter features are provided by the processors time stamp counter.
+#
+# Note: The implementation uses the lower 24-bits of the ACPI timer and
+# is compatible with both 24-bit and 32-bit ACPI timers.
+#
+# Copyright (c) 2013 - 2018, 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
+# 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.
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = PeiAcpiTimerLib
+ FILE_GUID = 3FCA54F6-E1A2-4B20-BE76-926B4B48BFAA
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = TimerLib|PEI_CORE PEIM
+ CONSTRUCTOR = AcpiTimerLibConstructor
+ MODULE_UNI_FILE = PeiAcpiTimerLib.uni
+
+[Sources]
+ AcpiTimerLib.c
+ PeiAcpiTimerLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ PcAtChipsetPkg/PcAtChipsetPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ PcdLib
+ PciLib
+ IoLib
+ DebugLib
+ HobLib
+
+[Pcd]
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciBusNumber ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciDeviceNumber ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciFunctionNumber ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciEnableRegisterOffset ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoBarEnableMask ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciBarRegisterOffset ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPortBaseAddress ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiPm1TmrOffset ## CONSUMES
+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPortBaseAddressMask ## CONSUMES
diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.uni b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.uni
new file mode 100644
index 0000000000..668161b14a
--- /dev/null
+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.uni
@@ -0,0 +1,23 @@
+// /** @file
+// PEI ACPI Timer Library
+//
+// Provides basic timer support using the ACPI timer hardware. The performance
+// counter features are provided by the processors time stamp counter.
+//
+// Copyright (c) 2018, 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
+// 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.
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT #language en-US "ACPI Timer Library"
+
+#string STR_MODULE_DESCRIPTION #language en-US "Provides basic timer support using the ACPI timer hardware."
+
diff --git a/PcAtChipsetPkg/PcAtChipsetPkg.dsc b/PcAtChipsetPkg/PcAtChipsetPkg.dsc
index b740f00e63..2395e9cf26 100644
--- a/PcAtChipsetPkg/PcAtChipsetPkg.dsc
+++ b/PcAtChipsetPkg/PcAtChipsetPkg.dsc
@@ -1,7 +1,7 @@
## @file
# PC/AT Chipset Package
#
-# Copyright (c) 2007 - 2016, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2007 - 2018, 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
@@ -46,6 +46,7 @@
IoApicLib|PcAtChipsetPkg/Library/BaseIoApicLib/BaseIoApicLib.inf
LocalApicLib|UefiCpuPkg/Library/BaseXApicLib/BaseXApicLib.inf
ReportStatusCodeLib|MdePkg/Library/BaseReportStatusCodeLibNull/BaseReportStatusCodeLibNull.inf
+ HobLib|MdePkg/Library/DxeHobLib/DxeHobLib.inf
[Components]
PcAtChipsetPkg/8254TimerDxe/8254Timer.inf
@@ -57,6 +58,7 @@
PcAtChipsetPkg/Library/BaseIoApicLib/BaseIoApicLib.inf
PcAtChipsetPkg/Library/AcpiTimerLib/BaseAcpiTimerLib.inf
PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
+ PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeDxe.inf
[BuildOptions]
--
2.11.0.windows.1
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2] PcAtChipsetPkg: Add PeiAcpiTimerLib to save PerformanceCounterFrequency in HOB
2018-01-26 5:57 ` Zeng, Star
@ 2018-01-31 11:18 ` Gao, Liming
0 siblings, 0 replies; 3+ messages in thread
From: Gao, Liming @ 2018-01-31 11:18 UTC (permalink / raw)
To: Zeng, Star, edk2-devel@lists.01.org
Star:
Thanks for you feedback. I will update the patch and push it.
>-----Original Message-----
>From: Zeng, Star
>Sent: Friday, January 26, 2018 1:57 PM
>To: Gao, Liming <liming.gao@intel.com>; edk2-devel@lists.01.org
>Cc: Zeng, Star <star.zeng@intel.com>
>Subject: RE: [edk2] [PATCH v2] PcAtChipsetPkg: Add PeiAcpiTimerLib to save
>PerformanceCounterFrequency in HOB
>
>Hi Liming,
>
>Reviewed-by: Star Zeng <star.zeng@intel.com>
>
>Two minor comments. Just for your information.
>1. Notice the title, it may be too long.
>2. In PeiAcpiTimerLib.c, you may need to add ASSERT
>(PerformanceCounterFrequency != NULL) after BuildGuidHob.
>And you can move " PerformanceCounterFrequency =
>(UINT64*)GET_GUID_HOB_DATA (GuidHob); " to the else condition, then
>only one "return" is needed.
>
>+ PerformanceCounterFrequency = NULL;
>+ GuidHob = GetFirstGuidHob (&mFrequencyHobGuid);
>+ if (GuidHob == NULL) {
>+ PerformanceCounterFrequency =
>(UINT64*)BuildGuidHob(&mFrequencyHobGuid, sizeof
>(*PerformanceCounterFrequency));
>+ *PerformanceCounterFrequency = InternalCalculateTscFrequency ();
>+ return *PerformanceCounterFrequency;
>+ }
>+ PerformanceCounterFrequency = (UINT64*)GET_GUID_HOB_DATA
>(GuidHob);
>+
>+ return *PerformanceCounterFrequency;
>+}
>
>
>Thanks,
>Star
>-----Original Message-----
>From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
>Liming Gao
>Sent: Tuesday, January 23, 2018 10:24 AM
>To: edk2-devel@lists.01.org
>Cc: Zeng, Star <star.zeng@intel.com>
>Subject: [edk2] [PATCH v2] PcAtChipsetPkg: Add PeiAcpiTimerLib to save
>PerformanceCounterFrequency in HOB
>
>In V2:
>1) Update PeiAcpiTimerLib base name to PeiAcpiTimerLib
>2) Update PeiAcpiTimerLib to add the missing constructor to enable ACPI IO
>space
>3) Update DxeAcpiTimerLib to cache frequency in constructor.
>
>PeiAcpiTimerLib caches PerformanceCounterFrequency in HOB, then Pei and
>Dxe
>AcpiTimerLib can share the same PerformanceCounterFrequency.
>
>Contributed-under: TianoCore Contribution Agreement 1.1
>Signed-off-by: Liming Gao <liming.gao@intel.com>
>Cc: Star Zeng <star.zeng@intel.com>
>---
> PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c | 4 +-
> .../Library/AcpiTimerLib/DxeAcpiTimerLib.c | 57 +++++++++++++++++-
> .../Library/AcpiTimerLib/DxeAcpiTimerLib.inf | 7 ++-
> .../Library/AcpiTimerLib/PeiAcpiTimerLib.c | 68
>++++++++++++++++++++++
> .../Library/AcpiTimerLib/PeiAcpiTimerLib.inf | 56 ++++++++++++++++++
> .../Library/AcpiTimerLib/PeiAcpiTimerLib.uni | 23 ++++++++
> PcAtChipsetPkg/PcAtChipsetPkg.dsc | 4 +-
> 7 files changed, 211 insertions(+), 8 deletions(-)
> create mode 100644 PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.c
> create mode 100644
>PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
> create mode 100644
>PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.uni
>
>diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c
>b/PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c
>index 792781a33f..2f3cb4bca4 100644
>--- a/PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c
>+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/AcpiTimerLib.c
>@@ -1,7 +1,7 @@
> /** @file
> ACPI Timer implements one instance of Timer Library.
>
>- Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved.<BR>
>+ Copyright (c) 2013 - 2018, 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
>@@ -21,6 +21,8 @@
> #include <Library/DebugLib.h>
> #include <IndustryStandard/Acpi.h>
>
>+GUID mFrequencyHobGuid = { 0x3fca54f6, 0xe1a2, 0x4b20, { 0xbe, 0x76,
>0x92, 0x6b, 0x4b, 0x48, 0xbf, 0xaa }};
>+
> /**
> Internal function to retrieves the 64-bit frequency in Hz.
>
>diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c
>b/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c
>index b141c680fb..67e18a1360 100644
>--- a/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c
>+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.c
>@@ -12,9 +12,27 @@
>
> **/
>
>-#include <Base.h>
>+#include <PiDxe.h>
> #include <Library/TimerLib.h>
> #include <Library/BaseLib.h>
>+#include <Library/HobLib.h>
>+
>+extern GUID mFrequencyHobGuid;
>+
>+/**
>+ The constructor function enables ACPI IO space.
>+
>+ If ACPI I/O space not enabled, this function will enable it.
>+ It will always return RETURN_SUCCESS.
>+
>+ @retval EFI_SUCCESS The constructor always returns RETURN_SUCCESS.
>+
>+**/
>+RETURN_STATUS
>+EFIAPI
>+AcpiTimerLibConstructor (
>+ VOID
>+ );
>
> /**
> Calculate TSC frequency.
>@@ -54,8 +72,41 @@ InternalGetPerformanceCounterFrequency (
> VOID
> )
> {
>- if (mPerformanceCounterFrequency == 0) {
>+ return mPerformanceCounterFrequency;
>+}
>+
>+/**
>+ The constructor function enables ACPI IO space, and caches
>PerformanceCounterFrequency.
>+
>+ @param ImageHandle The firmware allocated handle for the EFI image.
>+ @param SystemTable A pointer to the EFI System Table.
>+
>+ @retval EFI_SUCCESS The constructor always returns RETURN_SUCCESS.
>+
>+**/
>+EFI_STATUS
>+EFIAPI
>+DxeAcpiTimerLibConstructor (
>+ IN EFI_HANDLE ImageHandle,
>+ IN EFI_SYSTEM_TABLE *SystemTable
>+ )
>+{
>+ EFI_HOB_GUID_TYPE *GuidHob;
>+
>+ //
>+ // Enable ACPI IO space.
>+ //
>+ AcpiTimerLibConstructor ();
>+
>+ //
>+ // Initialize PerformanceCounterFrequency
>+ //
>+ GuidHob = GetFirstGuidHob (&mFrequencyHobGuid);
>+ if (GuidHob != NULL) {
>+ mPerformanceCounterFrequency = *(UINT64*)GET_GUID_HOB_DATA
>(GuidHob);
>+ } else {
> mPerformanceCounterFrequency = InternalCalculateTscFrequency ();
> }
>- return mPerformanceCounterFrequency;
>+
>+ return EFI_SUCCESS;
> }
>diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
>b/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
>index 2c1cc7d33c..601041c801 100644
>--- a/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
>+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
>@@ -7,7 +7,7 @@
> # Note: The implementation uses the lower 24-bits of the ACPI timer and
> # is compatible with both 24-bit and 32-bit ACPI timers.
> #
>-# Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved.<BR>
>+# Copyright (c) 2013 - 2018, 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
>@@ -22,10 +22,10 @@
> INF_VERSION = 0x00010005
> BASE_NAME = DxeAcpiTimerLib
> FILE_GUID = E624B98C-845A-4b94-9B50-B20475D552B9
>- MODULE_TYPE = BASE
>+ MODULE_TYPE = DXE_DRIVER
> VERSION_STRING = 1.0
> LIBRARY_CLASS = TimerLib|DXE_CORE DXE_DRIVER
>DXE_RUNTIME_DRIVER DXE_SMM_DRIVER UEFI_APPLICATION UEFI_DRIVER
>SMM_CORE
>- CONSTRUCTOR = AcpiTimerLibConstructor
>+ CONSTRUCTOR = DxeAcpiTimerLibConstructor
> MODULE_UNI_FILE = DxeAcpiTimerLib.uni
>
> [Sources]
>@@ -42,6 +42,7 @@
> PciLib
> IoLib
> DebugLib
>+ HobLib
>
> [Pcd]
> gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciBusNumber ##
>CONSUMES
>diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.c
>b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.c
>new file mode 100644
>index 0000000000..a4ed6a4434
>--- /dev/null
>+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.c
>@@ -0,0 +1,68 @@
>+/** @file
>+ ACPI Timer implements one instance of Timer Library.
>+
>+ Copyright (c) 2013 - 2018, 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
>+ 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 <PiPei.h>
>+#include <Library/TimerLib.h>
>+#include <Library/BaseLib.h>
>+#include <Library/HobLib.h>
>+
>+extern GUID mFrequencyHobGuid;
>+
>+/**
>+ Calculate TSC frequency.
>+
>+ The TSC counting frequency is determined by comparing how far it counts
>+ during a 101.4 us period as determined by the ACPI timer.
>+ The ACPI timer is used because it counts at a known frequency.
>+ The TSC is sampled, followed by waiting 363 counts of the ACPI timer,
>+ or 101.4 us. The TSC is then sampled again. The difference multiplied by
>+ 9861 is the TSC frequency. There will be a small error because of the
>+ overhead of reading the ACPI timer. An attempt is made to determine and
>+ compensate for this error.
>+
>+ @return The number of TSC counts per second.
>+
>+**/
>+UINT64
>+InternalCalculateTscFrequency (
>+ VOID
>+ );
>+
>+/**
>+ Internal function to retrieves the 64-bit frequency in Hz.
>+
>+ Internal function to retrieves the 64-bit frequency in Hz.
>+
>+ @return The frequency in Hz.
>+
>+**/
>+UINT64
>+InternalGetPerformanceCounterFrequency (
>+ VOID
>+ )
>+{
>+ UINT64 *PerformanceCounterFrequency;
>+ EFI_HOB_GUID_TYPE *GuidHob;
>+
>+ PerformanceCounterFrequency = NULL;
>+ GuidHob = GetFirstGuidHob (&mFrequencyHobGuid);
>+ if (GuidHob == NULL) {
>+ PerformanceCounterFrequency =
>(UINT64*)BuildGuidHob(&mFrequencyHobGuid, sizeof
>(*PerformanceCounterFrequency));
>+ *PerformanceCounterFrequency = InternalCalculateTscFrequency ();
>+ return *PerformanceCounterFrequency;
>+ }
>+ PerformanceCounterFrequency = (UINT64*)GET_GUID_HOB_DATA
>(GuidHob);
>+
>+ return *PerformanceCounterFrequency;
>+}
>diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
>b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
>new file mode 100644
>index 0000000000..1d8c95a3ec
>--- /dev/null
>+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
>@@ -0,0 +1,56 @@
>+## @file
>+# PEI ACPI Timer Library
>+#
>+# Provides basic timer support using the ACPI timer hardware. The
>performance
>+# counter features are provided by the processors time stamp counter.
>+#
>+# Note: The implementation uses the lower 24-bits of the ACPI timer and
>+# is compatible with both 24-bit and 32-bit ACPI timers.
>+#
>+# Copyright (c) 2013 - 2018, 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
>+# 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.
>+#
>+##
>+
>+[Defines]
>+ INF_VERSION = 0x00010005
>+ BASE_NAME = PeiAcpiTimerLib
>+ FILE_GUID = 3FCA54F6-E1A2-4B20-BE76-926B4B48BFAA
>+ MODULE_TYPE = BASE
>+ VERSION_STRING = 1.0
>+ LIBRARY_CLASS = TimerLib|PEI_CORE PEIM
>+ CONSTRUCTOR = AcpiTimerLibConstructor
>+ MODULE_UNI_FILE = PeiAcpiTimerLib.uni
>+
>+[Sources]
>+ AcpiTimerLib.c
>+ PeiAcpiTimerLib.c
>+
>+[Packages]
>+ MdePkg/MdePkg.dec
>+ PcAtChipsetPkg/PcAtChipsetPkg.dec
>+
>+[LibraryClasses]
>+ BaseLib
>+ PcdLib
>+ PciLib
>+ IoLib
>+ DebugLib
>+ HobLib
>+
>+[Pcd]
>+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciBusNumber ##
>CONSUMES
>+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciDeviceNumber ##
>CONSUMES
>+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciFunctionNumber ##
>CONSUMES
>+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciEnableRegisterOffset ##
>CONSUMES
>+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoBarEnableMask ##
>CONSUMES
>+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPciBarRegisterOffset ##
>CONSUMES
>+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPortBaseAddress ##
>CONSUMES
>+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiPm1TmrOffset ##
>CONSUMES
>+ gPcAtChipsetPkgTokenSpaceGuid.PcdAcpiIoPortBaseAddressMask ##
>CONSUMES
>diff --git a/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.uni
>b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.uni
>new file mode 100644
>index 0000000000..668161b14a
>--- /dev/null
>+++ b/PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.uni
>@@ -0,0 +1,23 @@
>+// /** @file
>+// PEI ACPI Timer Library
>+//
>+// Provides basic timer support using the ACPI timer hardware. The
>performance
>+// counter features are provided by the processors time stamp counter.
>+//
>+// Copyright (c) 2018, 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
>+// 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.
>+//
>+// **/
>+
>+
>+#string STR_MODULE_ABSTRACT #language en-US "ACPI Timer
>Library"
>+
>+#string STR_MODULE_DESCRIPTION #language en-US "Provides basic
>timer support using the ACPI timer hardware."
>+
>diff --git a/PcAtChipsetPkg/PcAtChipsetPkg.dsc
>b/PcAtChipsetPkg/PcAtChipsetPkg.dsc
>index b740f00e63..2395e9cf26 100644
>--- a/PcAtChipsetPkg/PcAtChipsetPkg.dsc
>+++ b/PcAtChipsetPkg/PcAtChipsetPkg.dsc
>@@ -1,7 +1,7 @@
> ## @file
> # PC/AT Chipset Package
> #
>-# Copyright (c) 2007 - 2016, Intel Corporation. All rights reserved.<BR>
>+# Copyright (c) 2007 - 2018, 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
>@@ -46,6 +46,7 @@
> IoApicLib|PcAtChipsetPkg/Library/BaseIoApicLib/BaseIoApicLib.inf
> LocalApicLib|UefiCpuPkg/Library/BaseXApicLib/BaseXApicLib.inf
>
>ReportStatusCodeLib|MdePkg/Library/BaseReportStatusCodeLibNull/BaseRe
>portStatusCodeLibNull.inf
>+ HobLib|MdePkg/Library/DxeHobLib/DxeHobLib.inf
>
> [Components]
> PcAtChipsetPkg/8254TimerDxe/8254Timer.inf
>@@ -57,6 +58,7 @@
> PcAtChipsetPkg/Library/BaseIoApicLib/BaseIoApicLib.inf
> PcAtChipsetPkg/Library/AcpiTimerLib/BaseAcpiTimerLib.inf
> PcAtChipsetPkg/Library/AcpiTimerLib/DxeAcpiTimerLib.inf
>+ PcAtChipsetPkg/Library/AcpiTimerLib/PeiAcpiTimerLib.inf
>
>PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeD
>xe.inf
>
> [BuildOptions]
>--
>2.11.0.windows.1
>
>_______________________________________________
>edk2-devel mailing list
>edk2-devel@lists.01.org
>https://lists.01.org/mailman/listinfo/edk2-devel
^ permalink raw reply [flat|nested] 3+ messages in thread
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2018-01-23 2:24 [PATCH v2] PcAtChipsetPkg: Add PeiAcpiTimerLib to save PerformanceCounterFrequency in HOB Liming Gao
2018-01-26 5:57 ` Zeng, Star
2018-01-31 11:18 ` Gao, Liming
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