From nobody Fri May 3 11:53:51 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of groups.io designates 66.175.222.12 as permitted sender) client-ip=66.175.222.12; envelope-from=bounce+27952+45707+1787277+3901457@groups.io; helo=web01.groups.io; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zoho.com: domain of groups.io designates 66.175.222.12 as permitted sender) smtp.mailfrom=bounce+27952+45707+1787277+3901457@groups.io; dmarc=fail(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1565861895; cv=none; d=zoho.com; s=zohoarc; b=kfSD4VpzLvB4dnvQNuD1N/4l+Azpfm6Je0ksnUr10J+xb7CmB6CHtyCSOGYn2BgoikidaDjidxpgurj8ZkpVPnyIdal9qB5+bnR/tgSz4RrZSu/4KcOXWYB9soWg71uAXPSCx06usdddmvUsMgndELpX0/nUAA/sKbc1nPB36bg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1565861895; h=Cc:Date:From:List-Id:List-Unsubscribe:Message-ID:Reply-To:Sender:Subject:To:ARC-Authentication-Results; bh=ypo0EkcEUOFEKdr1KWORoBV9ccQSEtCqxe1YU/MoZJk=; b=DV6ggPt1/HLR4zMvXvKbXjzuKgOIAv26oqh3L05bETPZ0icJwIZ1EV7XU4kQJsudqJmJOMY4FS5+u2bmEPjhsxUjtRuAyU5faS75g+wZlnnQ6qhP4MuzOAda0L3rTxAFhXTjUJ84lq7c6DlkwsSt3AFFw0OjwAmJNfSaRMF12lQ= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=pass; spf=pass (zoho.com: domain of groups.io designates 66.175.222.12 as permitted sender) smtp.mailfrom=bounce+27952+45707+1787277+3901457@groups.io; dmarc=fail header.from= (p=none dis=none) header.from= Received: from web01.groups.io (web01.groups.io [66.175.222.12]) by mx.zohomail.com with SMTPS id 1565861895647827.8792254246619; Thu, 15 Aug 2019 02:38:15 -0700 (PDT) Return-Path: X-Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by groups.io with SMTP; Thu, 15 Aug 2019 02:11:34 -0700 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Aug 2019 02:11:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,388,1559545200"; d="scan'208";a="178420611" X-Received: from dkuo18-mobl2.gar.corp.intel.com ([10.5.240.222]) by fmsmga007.fm.intel.com with ESMTP; 15 Aug 2019 02:11:32 -0700 From: "Donald Kuo" To: devel@edk2.groups.io Cc: Ray Ni , Star Zeng , Eric Dong , Amy Chan , Rangasai V Chaganty Subject: [edk2-devel] [PATCH] UefiCpuPkg: Adding a new TSC library by using CPUID(0x15) TSC leaf Date: Thu, 15 Aug 2019 17:11:29 +0800 Message-Id: <20190815091129.12800-1-donald.kuo@intel.com> Precedence: Bulk List-Unsubscribe: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,donald.kuo@intel.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1565861895; bh=RQ3IpaW4Tf2EzpMeyKTRncCL4omyB8aTplOSek+FgdI=; h=Cc:Date:From:Reply-To:Subject:To; b=QIER3+NaPB9dV0qbxjdmnWWw+pe2D6NnZ2ivxQ8mdSzuQgZFQ2NhBb2KFiIYYlgBwFn T2ZRmmb9AXT6VpaorRpu2+WOs/kbvAMAD7ZBswJZkfYUU3A3XMOj7FdeOcPPI4AByUkhP NFVqUZ4UR8T/0wsLnjrp3eTaloxvgeumlKA= X-ZohoMail-DKIM: pass (identity @groups.io) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3D1909 Cc: Ray Ni Cc: Star Zeng Cc: Eric Dong Cc: Amy Chan Cc: Rangasai V Chaganty Signed-off-by: Donald Kuo Reviewed-by: Eric Dong --- UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.c | 41 +++ UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.inf | 35 +++ UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.uni | 17 ++ UefiCpuPkg/Library/CpuTimerLib/CpuTimerLib.c | 279 +++++++++++++++++= ++++ UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.c | 85 +++++++ UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.inf | 37 +++ UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.uni | 17 ++ UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.c | 58 +++++ UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.inf | 36 +++ UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.uni | 17 ++ UefiCpuPkg/UefiCpuPkg.dec | 8 + UefiCpuPkg/UefiCpuPkg.dsc | 3 + UefiCpuPkg/UefiCpuPkg.uni | 10 + 13 files changed, 643 insertions(+) create mode 100644 UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.c create mode 100644 UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.inf create mode 100644 UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.uni create mode 100644 UefiCpuPkg/Library/CpuTimerLib/CpuTimerLib.c create mode 100644 UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.c create mode 100644 UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.inf create mode 100644 UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.uni create mode 100644 UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.c create mode 100644 UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.inf create mode 100644 UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.uni diff --git a/UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.c b/UefiCpuPkg/= Library/CpuTimerLib/BaseCpuTimerLib.c new file mode 100644 index 0000000000..6ddf917bad --- /dev/null +++ b/UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.c @@ -0,0 +1,41 @@ +/** @file + CPUID Leaf 0x15 for Core Crystal Clock frequency instance as Base Timer = Library. + + Copyright (c) 2019 Intel Corporation. All rights reserved.
+ SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include +#include +#include + +/** + CPUID Leaf 0x15 for Core Crystal Clock Frequency. + + The TSC counting frequency is determined by using CPUID leaf 0x15. Frequ= ency in MHz =3D Core XTAL frequency * EBX/EAX. + In newer flavors of the CPU, core xtal frequency is returned in ECX or 0= if not supported. + @return The number of TSC counts per second. + +**/ +UINT64 +CpuidCoreClockCalculateTscFrequency ( + 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 + ) +{ + return CpuidCoreClockCalculateTscFrequency (); +} + diff --git a/UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.inf b/UefiCpuPk= g/Library/CpuTimerLib/BaseCpuTimerLib.inf new file mode 100644 index 0000000000..fd93adc5f1 --- /dev/null +++ b/UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.inf @@ -0,0 +1,35 @@ +## @file +# Base CPU Timer Library +# +# Provides basic timer support using CPUID Leaf 0x15 XTAL frequency. The = performance +# counter features are provided by the processors time stamp counter. +# +# Copyright (c) 2019, Intel Corporation. All rights reserved.
+# SPDX-License-Identifier: BSD-2-Clause-Patent +# +## + +[Defines] + INF_VERSION =3D 0x00010005 + BASE_NAME =3D BaseCpuTimerLib + FILE_GUID =3D F10B5B91-D15A-496C-B044-B5235721AA08 + MODULE_TYPE =3D BASE + VERSION_STRING =3D 1.0 + LIBRARY_CLASS =3D TimerLib|SEC PEI_CORE PEIM + MODULE_UNI_FILE =3D BaseCpuTimerLib.uni + +[Sources] + CpuTimerLib.c + BaseCpuTimerLib.c + +[Packages] + MdePkg/MdePkg.dec + UefiCpuPkg/UefiCpuPkg.dec + +[LibraryClasses] + BaseLib + PcdLib + DebugLib + +[Pcd] + gUefiCpuPkgTokenSpaceGuid.PcdCpuCoreCrystalClockFrequency ## CONSUMES diff --git a/UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.uni b/UefiCpuPk= g/Library/CpuTimerLib/BaseCpuTimerLib.uni new file mode 100644 index 0000000000..fcf2b0fbcb --- /dev/null +++ b/UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.uni @@ -0,0 +1,17 @@ +// /** @file +// Base CPU Timer Library +// +// Provides basic timer support using CPUID Leaf 0x15 XTAL frequency. The= performance +// counter features are provided by the processors time stamp counter. +// +// Copyright (c) 2019, Intel Corporation. All rights reserved.
+// +// SPDX-License-Identifier: BSD-2-Clause-Patent +// +// **/ + + +#string STR_MODULE_ABSTRACT #language en-US "CPU Timer Library" + +#string STR_MODULE_DESCRIPTION #language en-US "Provides basic ti= mer support using CPUID Leaf 0x15 XTAL frequency." + diff --git a/UefiCpuPkg/Library/CpuTimerLib/CpuTimerLib.c b/UefiCpuPkg/Libr= ary/CpuTimerLib/CpuTimerLib.c new file mode 100644 index 0000000000..192a401fe6 --- /dev/null +++ b/UefiCpuPkg/Library/CpuTimerLib/CpuTimerLib.c @@ -0,0 +1,279 @@ +/** @file + CPUID Leaf 0x15 for Core Crystal Clock frequency instance of Timer Libra= ry. + + Copyright (c) 2019 Intel Corporation. All rights reserved.
+ SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include +#include +#include +#include +#include +#include + +GUID mCpuCrystalFrequencyHobGuid =3D { 0xe1ec5ad0, 0x8569, 0x46bd, { 0x8d,= 0xcd, 0x3b, 0x9f, 0x6f, 0x45, 0x82, 0x7a } }; + +/** + 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 + ); + +/** + CPUID Leaf 0x15 for Core Crystal Clock Frequency. + + The TSC counting frequency is determined by using CPUID leaf 0x15. Frequ= ency in MHz =3D Core XTAL frequency * EBX/EAX. + In newer flavors of the CPU, core xtal frequency is returned in ECX or 0= if not supported. + @return The number of TSC counts per second. + +**/ +UINT64 +CpuidCoreClockCalculateTscFrequency ( + VOID + ) +{ + UINT64 TscFrequency; + UINT64 CoreXtalFrequency; + UINT32 RegEax; + UINT32 RegEbx; + UINT32 RegEcx; + + // + // Use CPUID leaf 0x15 Time Stamp Counter and Nominal Core Crystal Clock= Information + // EBX returns 0 if not supported. ECX, if non zero, provides Core Xtal = Frequency in hertz. + // TSC frequency =3D (ECX, Core Xtal Frequency) * EBX/EAX. + // + AsmCpuid (CPUID_TIME_STAMP_COUNTER, &RegEax, &RegEbx, &RegEcx, NULL); + + // + // If EAX or EBX returns 0, the XTAL ratio is not enumerated. + // + if (RegEax =3D=3D 0 || RegEbx =3D=3D0 ) { + ASSERT (RegEax !=3D 0); + ASSERT (RegEbx !=3D 0); + return 0; + } + // + // If ECX returns 0, the XTAL frequency is not enumerated. + // And PcdCpuCoreCrystalClockFrequency defined should base on processor = series. + // + if (RegEcx =3D=3D 0) { + CoreXtalFrequency =3D PcdGet64 (PcdCpuCoreCrystalClockFrequency); + } else { + CoreXtalFrequency =3D (UINT64) RegEcx; + } + + // + // Calculate TSC frequency =3D (ECX, Core Xtal Frequency) * EBX/EAX + // + TscFrequency =3D DivU64x32 (MultU64x32 (CoreXtalFrequency, RegEbx) + (UI= NT64)(RegEax >> 1), RegEax); + + 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 Delay A period of time to delay in ticks. + +**/ +VOID +InternalCpuDelay ( + IN UINT64 Delay + ) +{ + UINT64 Ticks; + + // + // The target timer count is calculated here + // + Ticks =3D 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() <=3D Ticks) { + CpuPause(); + } +} + +/** + Stalls the CPU for at least the given number of microseconds. + + Stalls the CPU for the number of microseconds specified by MicroSeconds. + + @param[in] MicroSeconds The minimum number of microseconds to delay. + + @return MicroSeconds + +**/ +UINTN +EFIAPI +MicroSecondDelay ( + IN UINTN MicroSeconds + ) +{ + + InternalCpuDelay ( + DivU64x32 ( + MultU64x64 ( + MicroSeconds, + InternalGetPerformanceCounterFrequency () + ), + 1000000u + ) + ); + + return MicroSeconds; +} + +/** + Stalls the CPU for at least the given number of nanoseconds. + + Stalls the CPU for the number of nanoseconds specified by NanoSeconds. + + @param NanoSeconds The minimum number of nanoseconds to delay. + + @return NanoSeconds + +**/ +UINTN +EFIAPI +NanoSecondDelay ( + IN UINTN NanoSeconds + ) +{ + + InternalCpuDelay ( + DivU64x32 ( + MultU64x64 ( + NanoSeconds, + InternalGetPerformanceCounterFrequency () + ), + 1000000000u + ) + ); + + return NanoSeconds; +} + +/** + Retrieves the current value of a 64-bit free running performance counter. + + Retrieves the current value of a 64-bit free running performance counter= . The + counter can either count up by 1 or count down by 1. If the physical + performance counter counts by a larger increment, then the counter values + must be translated. The properties of the counter can be retrieved from + GetPerformanceCounterProperties(). + + @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 s= tarts + with immediately after is it rolls over is returned in StartValue. If + EndValue is not NULL, then the value that the performance counter end wi= th + immediately before it rolls over is returned in EndValue. The 64-bit + frequency of the performance counter in Hz is always returned. If StartV= alue + is less than EndValue, then the performance counter counts up. If StartV= alue + is greater than EndValue, then the performance counter counts down. For + example, a 64-bit free running counter that counts up would have a Start= Value + of 0 and an EndValue of 0xFFFFFFFFFFFFFFFF. A 24-bit free running counter + that counts down would have a StartValue of 0xFFFFFF and an EndValue of = 0. + + @param StartValue The value the performance counter starts with when it + rolls over. + @param EndValue The value that the performance counter ends with bef= ore + it rolls over. + + @return The frequency in Hz. + +**/ +UINT64 +EFIAPI +GetPerformanceCounterProperties ( + OUT UINT64 *StartValue, OPTIONAL + OUT UINT64 *EndValue OPTIONAL + ) +{ + if (StartValue !=3D NULL) { + *StartValue =3D 0; + } + + if (EndValue !=3D NULL) { + *EndValue =3D 0xffffffffffffffffULL; + } + return InternalGetPerformanceCounterFrequency (); +} + +/** + 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 cou= nter. + + @return The elapsed time in nanoseconds. + +**/ +UINT64 +EFIAPI +GetTimeInNanoSecond ( + IN UINT64 Ticks + ) +{ + UINT64 Frequency; + UINT64 NanoSeconds; + UINT64 Remainder; + INTN Shift; + + Frequency =3D GetPerformanceCounterProperties (NULL, NULL); + + // + // Ticks + // Time =3D --------- x 1,000,000,000 + // Frequency + // + NanoSeconds =3D MultU64x32 (DivU64x64Remainder (Ticks, Frequency, &Remai= nder), 1000000000u); + + // + // Ensure (Remainder * 1,000,000,000) will not overflow 64-bit. + // Since 2^29 < 1,000,000,000 =3D 0x3B9ACA00 < 2^30, Remainder should < = 2^(64-30) =3D 2^34, + // i.e. highest bit set in Remainder should <=3D 33. + // + Shift =3D MAX (0, HighBitSet64 (Remainder) - 33); + Remainder =3D RShiftU64 (Remainder, (UINTN) Shift); + Frequency =3D RShiftU64 (Frequency, (UINTN) Shift); + NanoSeconds +=3D DivU64x64Remainder (MultU64x32 (Remainder, 1000000000u)= , Frequency, NULL); + + return NanoSeconds; +} + diff --git a/UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.c b/UefiCpuPkg/L= ibrary/CpuTimerLib/DxeCpuTimerLib.c new file mode 100644 index 0000000000..269e5a3e83 --- /dev/null +++ b/UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.c @@ -0,0 +1,85 @@ +/** @file + CPUID Leaf 0x15 for Core Crystal Clock frequency instance of Timer Libra= ry. + + Copyright (c) 2019 Intel Corporation. All rights reserved.
+ SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include +#include +#include +#include + +extern GUID mCpuCrystalFrequencyHobGuid; + +/** + CPUID Leaf 0x15 for Core Crystal Clock Frequency. + + The TSC counting frequency is determined by using CPUID leaf 0x15. Frequ= ency in MHz =3D Core XTAL frequency * EBX/EAX. + In newer flavors of the CPU, core xtal frequency is returned in ECX or 0= if not supported. + @return The number of TSC counts per second. + +**/ +UINT64 +CpuidCoreClockCalculateTscFrequency ( + VOID + ); + +// +// Cached CPU Crystal counter frequency +// +UINT64 mCpuCrystalCounterFrequency =3D 0; + + +/** + 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 + ) +{ + return mCpuCrystalCounterFrequency; +} + +/** + The constructor function is to initialize CpuCrystalCounterFrequency. + + @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 +DxeCpuTimerLibConstructor ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_HOB_GUID_TYPE *GuidHob; + + // + // Initialize CpuCrystalCounterFrequency + // + GuidHob =3D GetFirstGuidHob (&mCpuCrystalFrequencyHobGuid); + if (GuidHob !=3D NULL) { + mCpuCrystalCounterFrequency =3D *(UINT64*)GET_GUID_HOB_DATA (GuidHob); + } else { + mCpuCrystalCounterFrequency =3D CpuidCoreClockCalculateTscFrequency (); + } + + if (mCpuCrystalCounterFrequency =3D=3D 0) { + return EFI_UNSUPPORTED; + } + + return EFI_SUCCESS; +} + diff --git a/UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.inf b/UefiCpuPkg= /Library/CpuTimerLib/DxeCpuTimerLib.inf new file mode 100644 index 0000000000..6c83549c87 --- /dev/null +++ b/UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.inf @@ -0,0 +1,37 @@ +## @file +# DXE CPU Timer Library +# +# Provides basic timer support using CPUID Leaf 0x15 XTAL frequency. The = performance +# counter features are provided by the processors time stamp counter. +# +# Copyright (c) 2019, Intel Corporation. All rights reserved.
+# SPDX-License-Identifier: BSD-2-Clause-Patent +# +## + +[Defines] + INF_VERSION =3D 0x00010005 + BASE_NAME =3D DxeCpuTimerLib + FILE_GUID =3D F22CC0DA-E7DB-4E4D-ABE2-A608188233A2 + MODULE_TYPE =3D DXE_DRIVER + VERSION_STRING =3D 1.0 + LIBRARY_CLASS =3D TimerLib|DXE_CORE DXE_DRIVER DXE_RUNT= IME_DRIVER DXE_SMM_DRIVER UEFI_APPLICATION UEFI_DRIVER SMM_CORE + CONSTRUCTOR =3D DxeCpuTimerLibConstructor + MODULE_UNI_FILE =3D DxeCpuTimerLib.uni + +[Sources] + CpuTimerLib.c + DxeCpuTimerLib.c + +[Packages] + MdePkg/MdePkg.dec + UefiCpuPkg/UefiCpuPkg.dec + +[LibraryClasses] + BaseLib + PcdLib + DebugLib + HobLib + +[Pcd] + gUefiCpuPkgTokenSpaceGuid.PcdCpuCoreCrystalClockFrequency ## CONSUMES diff --git a/UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.uni b/UefiCpuPkg= /Library/CpuTimerLib/DxeCpuTimerLib.uni new file mode 100644 index 0000000000..f55b92abac --- /dev/null +++ b/UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.uni @@ -0,0 +1,17 @@ +// /** @file +// DXE CPU Timer Library +// +// Provides basic timer support using CPUID Leaf 0x15 XTAL frequency. The= performance +// counter features are provided by the processors time stamp counter. +// +// Copyright (c) 2019, Intel Corporation. All rights reserved.
+// +// SPDX-License-Identifier: BSD-2-Clause-Patent +// +// **/ + + +#string STR_MODULE_ABSTRACT #language en-US "CPU Timer Library" + +#string STR_MODULE_DESCRIPTION #language en-US "Provides basic ti= mer support using CPUID Leaf 0x15 XTAL frequency." + diff --git a/UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.c b/UefiCpuPkg/L= ibrary/CpuTimerLib/PeiCpuTimerLib.c new file mode 100644 index 0000000000..91a7212056 --- /dev/null +++ b/UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.c @@ -0,0 +1,58 @@ +/** @file + CPUID Leaf 0x15 for Core Crystal Clock frequency instance as PEI Timer L= ibrary. + + Copyright (c) 2019 Intel Corporation. All rights reserved.
+ SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include +#include +#include +#include +#include + +extern GUID mCpuCrystalFrequencyHobGuid; + +/** + CPUID Leaf 0x15 for Core Crystal Clock Frequency. + + The TSC counting frequency is determined by using CPUID leaf 0x15. Frequ= ency in MHz =3D Core XTAL frequency * EBX/EAX. + In newer flavors of the CPU, core xtal frequency is returned in ECX or 0= if not supported. + @return The number of TSC counts per second. + +**/ +UINT64 +CpuidCoreClockCalculateTscFrequency ( + 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 *CpuCrystalCounterFrequency; + EFI_HOB_GUID_TYPE *GuidHob; + + CpuCrystalCounterFrequency =3D NULL; + GuidHob =3D GetFirstGuidHob (&mCpuCrystalFrequencyHobGuid); + if (GuidHob =3D=3D NULL) { + CpuCrystalCounterFrequency =3D (UINT64*)BuildGuidHob(&mCpuCrystalFreq= uencyHobGuid, sizeof (*CpuCrystalCounterFrequency)); + ASSERT (CpuCrystalCounterFrequency !=3D NULL); + *CpuCrystalCounterFrequency =3D CpuidCoreClockCalculateTscFrequency (); + } else { + CpuCrystalCounterFrequency =3D (UINT64*)GET_GUID_HOB_DATA (GuidHob); + } + + return *CpuCrystalCounterFrequency; +} + diff --git a/UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.inf b/UefiCpuPkg= /Library/CpuTimerLib/PeiCpuTimerLib.inf new file mode 100644 index 0000000000..7af0fc44a6 --- /dev/null +++ b/UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.inf @@ -0,0 +1,36 @@ +## @file +# PEI CPU Timer Library +# +# Provides basic timer support using CPUID Leaf 0x15 XTAL frequency. The = performance +# counter features are provided by the processors time stamp counter. +# +# Copyright (c) 2019, Intel Corporation. All rights reserved.
+# SPDX-License-Identifier: BSD-2-Clause-Patent +# +## + +[Defines] + INF_VERSION =3D 0x00010005 + BASE_NAME =3D PeiCpuTimerLib + FILE_GUID =3D 2B13DE00-1A5F-4DD7-A298-01B08AF1015A + MODULE_TYPE =3D BASE + VERSION_STRING =3D 1.0 + LIBRARY_CLASS =3D TimerLib|PEI_CORE PEIM + MODULE_UNI_FILE =3D PeiCpuTimerLib.uni + +[Sources] + CpuTimerLib.c + PeiCpuTimerLib.c + +[Packages] + MdePkg/MdePkg.dec + UefiCpuPkg/UefiCpuPkg.dec + +[LibraryClasses] + BaseLib + PcdLib + DebugLib + HobLib + +[Pcd] + gUefiCpuPkgTokenSpaceGuid.PcdCpuCoreCrystalClockFrequency ## CONSUMES diff --git a/UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.uni b/UefiCpuPkg= /Library/CpuTimerLib/PeiCpuTimerLib.uni new file mode 100644 index 0000000000..49beb44908 --- /dev/null +++ b/UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.uni @@ -0,0 +1,17 @@ +// /** @file +// PEI CPU Timer Library +// +// Provides basic timer support using CPUID Leaf 0x15 XTAL frequency. The= performance +// counter features are provided by the processors time stamp counter. +// +// Copyright (c) 2019, Intel Corporation. All rights reserved.
+// +// SPDX-License-Identifier: BSD-2-Clause-Patent +// +// **/ + + +#string STR_MODULE_ABSTRACT #language en-US "CPU Timer Library" + +#string STR_MODULE_DESCRIPTION #language en-US "Provides basic ti= mer support using CPUID Leaf 0x15 XTAL frequency." + diff --git a/UefiCpuPkg/UefiCpuPkg.dec b/UefiCpuPkg/UefiCpuPkg.dec index 14ddaa8633..86ad61f64b 100644 --- a/UefiCpuPkg/UefiCpuPkg.dec +++ b/UefiCpuPkg/UefiCpuPkg.dec @@ -211,6 +211,14 @@ # @Prompt If CPU features will be initialized during S3 resume. gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesInitOnS3Resume|FALSE|BOOLEAN|0x0= 000001D =20 + ## Specifies CPUID Leaf 0x15 Time Stamp Counter and Nominal Core Crystal= Clock Frequency. + # TSC Frequency =3D ECX (core crystal clock frequency) * EBX/EAX. + # Intel Xeon Processor Scalable Family with CPUID signature 06_55H =3D= 25000000 (25MHz) + # 6th and 7th generation Intel Core processors and Intel Xeon W Proces= sor Family =3D 24000000 (24MHz) + # Intel Atom processors based on Goldmont Microarchitecture with CPUID= signature 06_5CH =3D 19200000 (19.2MHz) + # @Prompt This PCD is the nominal frequency of the core crystal clock in= Hz as is CPUID Leaf 0x15:ECX + gUefiCpuPkgTokenSpaceGuid.PcdCpuCoreCrystalClockFrequency|24000000|UINT6= 4|0x32132113 + [PcdsFixedAtBuild, PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx] ## Specifies max supported number of Logical Processors. # @Prompt Configure max supported number of Logical Processors diff --git a/UefiCpuPkg/UefiCpuPkg.dsc b/UefiCpuPkg/UefiCpuPkg.dsc index bf690d3978..e7dfe30eda 100644 --- a/UefiCpuPkg/UefiCpuPkg.dsc +++ b/UefiCpuPkg/UefiCpuPkg.dsc @@ -101,6 +101,9 @@ UefiCpuPkg/CpuIoPei/CpuIoPei.inf UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/SecPeiDxeTimerLibUefiCpu.inf UefiCpuPkg/Application/Cpuid/Cpuid.inf + UefiCpuPkg/Library/CpuTimerLib/BaseCpuTimerLib.inf + UefiCpuPkg/Library/CpuTimerLib/DxeCpuTimerLib.inf + UefiCpuPkg/Library/CpuTimerLib/PeiCpuTimerLib.inf =20 [Components.IA32, Components.X64] UefiCpuPkg/CpuDxe/CpuDxe.inf diff --git a/UefiCpuPkg/UefiCpuPkg.uni b/UefiCpuPkg/UefiCpuPkg.uni index 80af4fc1d2..fbf7680726 100644 --- a/UefiCpuPkg/UefiCpuPkg.uni +++ b/UefiCpuPkg/UefiCpuPkg.uni @@ -242,3 +242,13 @@ #string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuKnownGoodStackSize_HELP #lang= uage en-US "Size of good stack for an exception.\n" = "This PCD will only take into effect if PcdCpuStackGuard is enab= led.\n" =20 +#string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuCoreCrystalClockFrequency_PROM= PT #language en-US "Specifies CPUID Leaf 0x15 Time Stamp Counter and Nomin= al Core Crystal Clock Frequency." + +#string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuCoreCrystalClockFrequency_HELP= #language en-US "Specifies CPUID Leaf 0x15 Time Stamp Counter and Nominal= Core Crystal Clock Frequency.

\n" + = "TSC Frequency =3D ECX (core crystal clock frequency) * E= BX/EAX.

\n" + = "This PCD is the nominal frequency of the core crystal cl= ock in Hz as is CPUID Leaf 0x15:ECX.

\n" + = "Default value is 24000000 for 6th and 7th generation Int= el Core processors and Intel Xeon W Processor Family.
\n" + = "25000000 - Intel Xeon Processor Scalable Family with C= PUID signature 06_55H(25MHz).
\n" + = "24000000 - 6th and 7th generation Intel Core processor= s and Intel Xeon W Processor Family(24MHz).
\n" + = "19200000 - Intel Atom processors based on Goldmont Mic= roarchitecture with CPUID signature 06_5CH(19.2MHz).
\n" + --=20 2.14.2.windows.3 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#45707): https://edk2.groups.io/g/devel/message/45707 Mute This Topic: https://groups.io/mt/32839184/1787277 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org] -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-