From e71baad96e2c14ce48d793dbe4847169fbf74b88 Mon Sep 17 00:00:00 2001 From: Guo Mang Date: Thu, 22 Dec 2016 17:05:34 +0800 Subject: PerformancePkg: Move to new location Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Guo Mang --- .../Library/TscTimerLib/BaseTscTimerLib.c | 45 ---- .../Library/TscTimerLib/BaseTscTimerLib.inf | 59 ----- .../Library/TscTimerLib/DxeTscTimerLib.c | 102 -------- .../Library/TscTimerLib/DxeTscTimerLib.inf | 64 ----- .../Library/TscTimerLib/PeiTscTimerLib.c | 76 ------ .../Library/TscTimerLib/PeiTscTimerLib.inf | 60 ----- .../Library/TscTimerLib/TscTimerLibInternal.h | 55 ----- .../Library/TscTimerLib/TscTimerLibShare.c | 275 --------------------- 8 files changed, 736 deletions(-) delete mode 100644 PerformancePkg/Library/TscTimerLib/BaseTscTimerLib.c delete mode 100644 PerformancePkg/Library/TscTimerLib/BaseTscTimerLib.inf delete mode 100644 PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c delete mode 100644 PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.inf delete mode 100644 PerformancePkg/Library/TscTimerLib/PeiTscTimerLib.c delete mode 100644 PerformancePkg/Library/TscTimerLib/PeiTscTimerLib.inf delete mode 100644 PerformancePkg/Library/TscTimerLib/TscTimerLibInternal.h delete mode 100644 PerformancePkg/Library/TscTimerLib/TscTimerLibShare.c (limited to 'PerformancePkg/Library') diff --git a/PerformancePkg/Library/TscTimerLib/BaseTscTimerLib.c b/PerformancePkg/Library/TscTimerLib/BaseTscTimerLib.c deleted file mode 100644 index c49f786641..0000000000 --- a/PerformancePkg/Library/TscTimerLib/BaseTscTimerLib.c +++ /dev/null @@ -1,45 +0,0 @@ -/** @file - A Base Timer Library implementation which uses the Time Stamp Counter in the processor. - - For Pentium 4 processors, Intel Xeon processors (family [0FH], models [03H and higher]); - for Intel Core Solo and Intel Core Duo processors (family [06H], model [0EH]); - for the Intel Xeon processor 5100 series and Intel Core 2 Duo processors (family [06H], model [0FH]); - for Intel Core 2 and Intel Xeon processors (family [06H], display_model [17H]); - for Intel Atom processors (family [06H], display_model [1CH]): - the time-stamp counter increments at a constant rate. - That rate may be set by the maximum core-clock to bus-clock ratio of the processor or may be set by - the maximum resolved frequency at which the processor is booted. The maximum resolved frequency may - differ from the maximum qualified frequency of the processor. - - The specific processor configuration determines the behavior. Constant TSC behavior ensures that the - duration of each clock tick is uniform and supports the use of the TSC as a wall clock timer even if - the processor core changes frequency. This is the architectural behavior moving forward. - - A Processor's support for invariant TSC is indicated by CPUID.0x80000007.EDX[8]. - - Copyright (c) 2009 - 2011, Intel Corporation. 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 "TscTimerLibInternal.h" - -/** Get TSC frequency. - - @return The number of TSC counts per second. - -**/ -UINT64 -InternalGetTscFrequency ( - VOID - ) -{ - return InternalCalculateTscFrequency (); -} - diff --git a/PerformancePkg/Library/TscTimerLib/BaseTscTimerLib.inf b/PerformancePkg/Library/TscTimerLib/BaseTscTimerLib.inf deleted file mode 100644 index 9d622687b5..0000000000 --- a/PerformancePkg/Library/TscTimerLib/BaseTscTimerLib.inf +++ /dev/null @@ -1,59 +0,0 @@ -## @file -# Base Timer Library which uses the Time Stamp Counter in the processor. -# -# 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. -# This is the architectural behavior moving forward. -# 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 - 2015, Intel Corporation. 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. -# -## - -[Defines] - INF_VERSION = 0x00010005 - BASE_NAME = BaseTscTimerLib - FILE_GUID = D29338B9-50FE-4e4f-B7D4-A150A2C1F4FB - MODULE_TYPE = BASE - VERSION_STRING = 1.0 - LIBRARY_CLASS = TimerLib - - -# -# VALID_ARCHITECTURES = IA32 X64 -# - -[Sources.common] - TscTimerLibShare.c - BaseTscTimerLib.c - TscTimerLibInternal.h - - -[Packages] - MdePkg/MdePkg.dec - PerformancePkg/PerformancePkg.dec - - -[LibraryClasses] - PcdLib - PciLib - IoLib - BaseLib - -[Pcd.common] - gPerformancePkgTokenSpaceGuid.PcdPerfPkgAcpiIoPortBaseAddress ## SOMETIMES_CONSUMES diff --git a/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c b/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c deleted file mode 100644 index c540d420da..0000000000 --- a/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.c +++ /dev/null @@ -1,102 +0,0 @@ -/** @file - A Dxe Timer Library implementation which uses the Time Stamp Counter in the processor. - - For Pentium 4 processors, Intel Xeon processors (family [0FH], models [03H and higher]); - for Intel Core Solo and Intel Core Duo processors (family [06H], model [0EH]); - for the Intel Xeon processor 5100 series and Intel Core 2 Duo processors (family [06H], model [0FH]); - for Intel Core 2 and Intel Xeon processors (family [06H], display_model [17H]); - for Intel Atom processors (family [06H], display_model [1CH]): - the time-stamp counter increments at a constant rate. - That rate may be set by the maximum core-clock to bus-clock ratio of the processor or may be set by - the maximum resolved frequency at which the processor is booted. The maximum resolved frequency may - differ from the maximum qualified frequency of the processor. - - The specific processor configuration determines the behavior. Constant TSC behavior ensures that the - duration of each clock tick is uniform and supports the use of the TSC as a wall clock timer even if - the processor core changes frequency. This is the architectural behavior moving forward. - - A Processor's support for invariant TSC is indicated by CPUID.0x80000007.EDX[8]. - - Copyright (c) 2009 - 2011, Intel Corporation. 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 -#include -#include -#include -#include -#include "TscTimerLibInternal.h" - -UINT64 mTscFrequency; - -/** The constructor function determines the actual TSC frequency. - - First, Get TSC frequency from system configuration table with TSC frequency GUID, - if the table is not found, install it. - This function will always return EFI_SUCCESS. - - @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 EFI_SUCCESS. - -**/ -EFI_STATUS -EFIAPI -DxeTscTimerLibConstructor ( - IN EFI_HANDLE ImageHandle, - IN EFI_SYSTEM_TABLE *SystemTable - ) -{ - EFI_STATUS Status; - UINT64 *TscFrequency; - - TscFrequency = NULL; - // - // Get TSC frequency from system configuration table with TSC frequency GUID. - // - Status = EfiGetSystemConfigurationTable (&gEfiTscFrequencyGuid, (VOID **) &TscFrequency); - if (Status == EFI_SUCCESS) { - ASSERT (TscFrequency != NULL); - mTscFrequency = *TscFrequency; - return EFI_SUCCESS; - } - - // - // TSC frequency GUID system configuration table is not found, install it. - // - - Status = gBS->AllocatePool (EfiBootServicesData, sizeof (UINT64), (VOID **) &TscFrequency); - ASSERT_EFI_ERROR (Status); - - *TscFrequency = InternalCalculateTscFrequency (); - // - // TscFrequency now points to the number of TSC counts per second, install system configuration table for it. - // - gBS->InstallConfigurationTable (&gEfiTscFrequencyGuid, TscFrequency); - - mTscFrequency = *TscFrequency; - return EFI_SUCCESS; -} - -/** Get TSC frequency. - - @return The number of TSC counts per second. - -**/ -UINT64 -InternalGetTscFrequency ( - VOID - ) -{ - return mTscFrequency; -} - diff --git a/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.inf b/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.inf deleted file mode 100644 index 16db5f73ea..0000000000 --- a/PerformancePkg/Library/TscTimerLib/DxeTscTimerLib.inf +++ /dev/null @@ -1,64 +0,0 @@ -## @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. -# This is the architectural behavior moving forward. -# 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 - 2015, Intel Corporation. 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. -# -## - -[Defines] - INF_VERSION = 0x00010005 - BASE_NAME = DxeTscTimerLib - FILE_GUID = 95ab030f-b4fd-4ee4-92a5-9e04e87634d9 - 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 = DxeTscTimerLibConstructor - - -# -# VALID_ARCHITECTURES = IA32 X64 -# - -[Sources.common] - TscTimerLibShare.c - DxeTscTimerLib.c - TscTimerLibInternal.h - - -[Packages] - MdePkg/MdePkg.dec - PerformancePkg/PerformancePkg.dec - - -[LibraryClasses] - UefiBootServicesTableLib - PcdLib - PciLib - IoLib - BaseLib - UefiLib - DebugLib - -[Guids] - gEfiTscFrequencyGuid ## CONSUMES ## SystemTable - -[Pcd.common] - gPerformancePkgTokenSpaceGuid.PcdPerfPkgAcpiIoPortBaseAddress ## SOMETIMES_CONSUMES diff --git a/PerformancePkg/Library/TscTimerLib/PeiTscTimerLib.c b/PerformancePkg/Library/TscTimerLib/PeiTscTimerLib.c deleted file mode 100644 index af3600b007..0000000000 --- a/PerformancePkg/Library/TscTimerLib/PeiTscTimerLib.c +++ /dev/null @@ -1,76 +0,0 @@ -/** @file - A Pei Timer Library implementation which uses the Time Stamp Counter in the processor. - - For Pentium 4 processors, Intel Xeon processors (family [0FH], models [03H and higher]); - for Intel Core Solo and Intel Core Duo processors (family [06H], model [0EH]); - for the Intel Xeon processor 5100 series and Intel Core 2 Duo processors (family [06H], model [0FH]); - for Intel Core 2 and Intel Xeon processors (family [06H], display_model [17H]); - for Intel Atom processors (family [06H], display_model [1CH]): - the time-stamp counter increments at a constant rate. - That rate may be set by the maximum core-clock to bus-clock ratio of the processor or may be set by - the maximum resolved frequency at which the processor is booted. The maximum resolved frequency may - differ from the maximum qualified frequency of the processor. - - The specific processor configuration determines the behavior. Constant TSC behavior ensures that the - duration of each clock tick is uniform and supports the use of the TSC as a wall clock timer even if - the processor core changes frequency. This is the architectural behavior moving forward. - - A Processor's support for invariant TSC is indicated by CPUID.0x80000007.EDX[8]. - - Copyright (c) 2009 - 2011, Intel Corporation. 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 -#include -#include -#include "TscTimerLibInternal.h" - -/** Get TSC frequency from TSC frequency GUID HOB, if the HOB is not found, build it. - - @return The number of TSC counts per second. - -**/ -UINT64 -InternalGetTscFrequency ( - VOID - ) -{ - EFI_HOB_GUID_TYPE *GuidHob; - VOID *DataInHob; - UINT64 TscFrequency; - - // - // Get TSC frequency from TSC frequency GUID HOB. - // - GuidHob = GetFirstGuidHob (&gEfiTscFrequencyGuid); - if (GuidHob != NULL) { - DataInHob = GET_GUID_HOB_DATA (GuidHob); - TscFrequency = * (UINT64 *) DataInHob; - return TscFrequency; - } - - // - // TSC frequency GUID HOB is not found, build it. - // - - TscFrequency = InternalCalculateTscFrequency (); - // - // TscFrequency is now equal to the number of TSC counts per second, build GUID HOB for it. - // - BuildGuidDataHob ( - &gEfiTscFrequencyGuid, - &TscFrequency, - sizeof (UINT64) - ); - - return TscFrequency; -} - diff --git a/PerformancePkg/Library/TscTimerLib/PeiTscTimerLib.inf b/PerformancePkg/Library/TscTimerLib/PeiTscTimerLib.inf deleted file mode 100644 index 68e34e0ede..0000000000 --- a/PerformancePkg/Library/TscTimerLib/PeiTscTimerLib.inf +++ /dev/null @@ -1,60 +0,0 @@ -## @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. -# This is the architectural behavior moving forward. -# 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 - 2015, Intel Corporation. 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. -# -## - -[Defines] - INF_VERSION = 0x00010005 - BASE_NAME = PeiTscTimerLib - FILE_GUID = 342C36C0-15DF-43b4-9EC9-FBF748BFB3D1 - MODULE_TYPE = PEIM - VERSION_STRING = 1.0 - LIBRARY_CLASS = TimerLib|PEIM PEI_CORE - - -# -# VALID_ARCHITECTURES = IA32 X64 -# - -[Sources.common] - TscTimerLibShare.c - PeiTscTimerLib.c - TscTimerLibInternal.h - - -[Packages] - MdePkg/MdePkg.dec - PerformancePkg/PerformancePkg.dec - - -[LibraryClasses] - PcdLib - PciLib - IoLib - BaseLib - HobLib - -[Guids] - gEfiTscFrequencyGuid ## PRODUCES ## HOB - -[Pcd.common] - gPerformancePkgTokenSpaceGuid.PcdPerfPkgAcpiIoPortBaseAddress ## SOMETIMES_CONSUMES diff --git a/PerformancePkg/Library/TscTimerLib/TscTimerLibInternal.h b/PerformancePkg/Library/TscTimerLib/TscTimerLibInternal.h deleted file mode 100644 index a4ed0ebb31..0000000000 --- a/PerformancePkg/Library/TscTimerLib/TscTimerLibInternal.h +++ /dev/null @@ -1,55 +0,0 @@ -/** @file - Internal header file for TscTimerLib instances. - - Copyright (c) 2009 - 2011, Intel Corporation. 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. - -**/ - -#ifndef _TSC_TIMER_LIB_INTERNAL_H_ -#define _TSC_TIMER_LIB_INTERNAL_H_ - -#include - -#include -#include -#include -#include -#include - -/** Get TSC frequency. - - @return The number of TSC counts per second. - -**/ -UINT64 -InternalGetTscFrequency ( - VOID - ); - -/** Calculate TSC frequency. - - The TSC counting frequency is determined by comparing how far it counts - during a 1ms period as determined by the ACPI timer. The ACPI timer is - used because it counts at a known frequency. - If ACPI I/O space not enabled, this function will enable it. Then the - TSC is sampled, followed by waiting for 3579 clocks of the ACPI timer, or 1ms. - The TSC is then sampled again. The difference multiplied by 1000 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 - ); - -#endif diff --git a/PerformancePkg/Library/TscTimerLib/TscTimerLibShare.c b/PerformancePkg/Library/TscTimerLib/TscTimerLibShare.c deleted file mode 100644 index 161af00237..0000000000 --- a/PerformancePkg/Library/TscTimerLib/TscTimerLibShare.c +++ /dev/null @@ -1,275 +0,0 @@ -/** @file - The Timer Library implementation which uses the Time Stamp Counter in the processor. - - For Pentium 4 processors, Intel Xeon processors (family [0FH], models [03H and higher]); - for Intel Core Solo and Intel Core Duo processors (family [06H], model [0EH]); - for the Intel Xeon processor 5100 series and Intel Core 2 Duo processors (family [06H], model [0FH]); - for Intel Core 2 and Intel Xeon processors (family [06H], display_model [17H]); - for Intel Atom processors (family [06H], display_model [1CH]): - the time-stamp counter increments at a constant rate. - That rate may be set by the maximum core-clock to bus-clock ratio of the processor or may be set by - the maximum resolved frequency at which the processor is booted. The maximum resolved frequency may - differ from the maximum qualified frequency of the processor. - - The specific processor configuration determines the behavior. Constant TSC behavior ensures that the - duration of each clock tick is uniform and supports the use of the TSC as a wall clock timer even if - the processor core changes frequency. This is the architectural behavior moving forward. - - A Processor's support for invariant TSC is indicated by CPUID.0x80000007.EDX[8]. - - Copyright (c) 2009 - 2011, Intel Corporation. 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 "TscTimerLibInternal.h" - -/** Calculate TSC frequency. - - The TSC counting frequency is determined by comparing how far it counts - during a 1ms period as determined by the ACPI timer. The ACPI timer is - used because it counts at a known frequency. - If ACPI I/O space not enabled, this function will enable it. Then the - TSC is sampled, followed by waiting for 3579 clocks of the ACPI timer, or 1ms. - The TSC is then sampled again. The difference multiplied by 1000 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 - ) -{ - UINT64 StartTSC; - UINT64 EndTSC; - UINT32 TimerAddr; - UINT32 Ticks; - UINT64 TscFrequency; - - // - // If ACPI I/O space is not enabled yet, program ACPI I/O base address and enable it. - // - if ((PciRead8 (PCI_ICH_LPC_ADDRESS (R_ICH_LPC_ACPI_CNT)) & B_ICH_LPC_ACPI_CNT_ACPI_EN) == 0) { - PciWrite16 (PCI_ICH_LPC_ADDRESS (R_ICH_LPC_ACPI_BASE), PcdGet16 (PcdPerfPkgAcpiIoPortBaseAddress)); - PciOr8 (PCI_ICH_LPC_ADDRESS (R_ICH_LPC_ACPI_CNT), B_ICH_LPC_ACPI_CNT_ACPI_EN); - } - - // - // ACPI I/O space should be enabled now, locate the ACPI Timer. - // ACPI I/O base address maybe have be initialized by other driver with different value, - // So get it from PCI space directly. - // - TimerAddr = ((PciRead16 (PCI_ICH_LPC_ADDRESS (R_ICH_LPC_ACPI_BASE))) & B_ICH_LPC_ACPI_BASE_BAR) + R_ACPI_PM1_TMR; - Ticks = IoRead32 (TimerAddr) + (3579); // Set Ticks to 1ms in the future - StartTSC = AsmReadTsc(); // Get base value for the TSC - // - // Wait until the ACPI timer has counted 1ms. - // Timer wrap-arounds are handled correctly by this function. - // When the current ACPI timer value is greater than 'Ticks', the while loop will exit. - // - while (((Ticks - IoRead32 (TimerAddr)) & BIT23) == 0) { - CpuPause(); - } - EndTSC = AsmReadTsc(); // TSC value 1ms later - - TscFrequency = MultU64x32 ( - (EndTSC - StartTSC), // Number of TSC counts in 1ms - 1000 // Number of ms in a second - ); - - return TscFrequency; -} - -/** Stalls the CPU for at least the given number of ticks. - - Stalls the CPU for at least the given number of ticks. It's invoked by - MicroSecondDelay() and NanoSecondDelay(). - - @param[in] Delay A period of time to delay in ticks. - -**/ -VOID -InternalX86Delay ( - IN UINT64 Delay - ) -{ - UINT64 Ticks; - - // - // The target timer count is calculated here - // - Ticks = AsmReadTsc() + Delay; - - // - // Wait until time out - // Timer wrap-arounds are NOT handled correctly by this function. - // Thus, this function must be called within 10 years of reset since - // Intel guarantees a minimum of 10 years before the TSC wraps. - // - while (AsmReadTsc() <= Ticks) CpuPause(); -} - -/** Stalls the CPU for at least the specified number of MicroSeconds. - - @param[in] MicroSeconds The minimum number of microseconds to delay. - - @return The value of MicroSeconds input. - -**/ -UINTN -EFIAPI -MicroSecondDelay ( - IN UINTN MicroSeconds - ) -{ - InternalX86Delay ( - DivU64x32 ( - MultU64x64 ( - InternalGetTscFrequency (), - MicroSeconds - ), - 1000000u - ) - ); - return MicroSeconds; -} - -/** Stalls the CPU for at least the specified number of NanoSeconds. - - @param[in] NanoSeconds The minimum number of nanoseconds to delay. - - @return The value of NanoSeconds input. - -**/ -UINTN -EFIAPI -NanoSecondDelay ( - IN UINTN NanoSeconds - ) -{ - InternalX86Delay ( - DivU64x32 ( - MultU64x32 ( - InternalGetTscFrequency (), - (UINT32)NanoSeconds - ), - 1000000000u - ) - ); - return NanoSeconds; -} - -/** Retrieves the current value of the 64-bit free running Time-Stamp counter. - - The time-stamp counter (as implemented in the P6 family, Pentium, Pentium M, - Pentium 4, Intel Xeon, Intel Core Solo and Intel Core Duo processors and - later processors) is a 64-bit counter that is set to 0 following a RESET of - the processor. Following a RESET, the counter increments even when the - processor is halted by the HLT instruction or the external STPCLK# pin. Note - that the assertion of the external DPSLP# pin may cause the time-stamp - counter to stop. - - The properties of the counter can be retrieved by the - GetPerformanceCounterProperties() function. - - @return The current value of the free running performance counter. - -**/ -UINT64 -EFIAPI -GetPerformanceCounter ( - VOID - ) -{ - return AsmReadTsc(); -} - -/** Retrieves the 64-bit frequency in Hz and the range of performance counter - values. - - If StartValue is not NULL, then the value that the performance counter starts - with, 0x0, is returned in StartValue. If EndValue is not NULL, then the value - that the performance counter end with, 0xFFFFFFFFFFFFFFFF, is returned in - EndValue. - - The 64-bit frequency of the performance counter, in Hz, is always returned. - To determine average processor clock frequency, Intel recommends the use of - EMON logic to count processor core clocks over the period of time for which - the average is required. - - - @param[out] StartValue Pointer to where the performance counter's starting value is saved, or NULL. - @param[out] EndValue Pointer to where the performance counter's ending value is saved, or NULL. - - @return The frequency in Hz. - -**/ -UINT64 -EFIAPI -GetPerformanceCounterProperties ( - OUT UINT64 *StartValue, OPTIONAL - OUT UINT64 *EndValue OPTIONAL - ) -{ - if (StartValue != NULL) { - *StartValue = 0; - } - if (EndValue != NULL) { - *EndValue = 0xFFFFFFFFFFFFFFFFull; - } - - return InternalGetTscFrequency (); -} - -/** - Converts elapsed ticks of performance counter to time in nanoseconds. - - This function converts the elapsed ticks of running performance counter to - time value in unit of nanoseconds. - - @param Ticks The number of elapsed ticks of running performance counter. - - @return The elapsed time in nanoseconds. - -**/ -UINT64 -EFIAPI -GetTimeInNanoSecond ( - IN UINT64 Ticks - ) -{ - UINT64 Frequency; - UINT64 NanoSeconds; - UINT64 Remainder; - INTN Shift; - - Frequency = GetPerformanceCounterProperties (NULL, NULL); - - // - // Ticks - // Time = --------- x 1,000,000,000 - // Frequency - // - NanoSeconds = MultU64x32 (DivU64x64Remainder (Ticks, Frequency, &Remainder), 1000000000u); - - // - // Ensure (Remainder * 1,000,000,000) will not overflow 64-bit. - // Since 2^29 < 1,000,000,000 = 0x3B9ACA00 < 2^30, Remainder should < 2^(64-30) = 2^34, - // i.e. highest bit set in Remainder should <= 33. - // - Shift = MAX (0, HighBitSet64 (Remainder) - 33); - Remainder = RShiftU64 (Remainder, (UINTN) Shift); - Frequency = RShiftU64 (Frequency, (UINTN) Shift); - NanoSeconds += DivU64x64Remainder (MultU64x32 (Remainder, 1000000000u), Frequency, NULL); - - return NanoSeconds; -} -- cgit v1.2.3