diff options
4 files changed, 262 insertions, 0 deletions
diff --git a/MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf b/MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf index 385eec9..7021e54 100644 --- a/MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf +++ b/MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf @@ -7,6 +7,9 @@ # used by SMM drivers and runtime drivers, ACPI timer is recommended for SMM
# drivers and runtime drivers.
#
+# Note that for IA-32 and x64, this library only supports xAPIC mode. If x2APIC
+# support is desired, the SecPeiDxeTimerLibUefiCpu library can be used.
+#
# Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>
#
# This program and the accompanying materials
diff --git a/UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/SecPeiDxeTimerLibUefiCpu.inf b/UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/SecPeiDxeTimerLibUefiCpu.inf new file mode 100644 index 0000000..bf76f35 --- /dev/null +++ b/UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/SecPeiDxeTimerLibUefiCpu.inf @@ -0,0 +1,63 @@ +## @file
+# Instance of Timer Library only using CPU resources.
+#
+# Timer Library that only uses CPU resources to provide calibrated delays
+# on IA-32, x64, and IPF.
+# Note: Because CPU Local APIC and ITC could be programmed by OS, it cannot be
+# used by SMM drivers and runtime drivers, ACPI timer is recommended for SMM
+# drivers and runtime drivers.
+#
+# This library differs with the SecPeiDxeTimerLibCpu library in the MdePkg in
+# that it uses the local APIC library so that it supports x2APIC mode.
+#
+# Copyright (c) 2010, 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 = SecPeiDxeTimerLibUefiCpu
+ FILE_GUID = 4FFF2014-2086-4ee6-9B58-886D1967861C
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = TimerLib|BASE DXE_CORE DXE_DRIVER DXE_SAL_DRIVER PEIM PEI_CORE SEC UEFI_APPLICATION UEFI_DRIVER
+
+
+#
+# VALID_ARCHITECTURES = IA32 X64 IPF
+#
+
+[Sources.Ia32, Sources.X64]
+ X86TimerLib.c
+
+[Sources.IPF]
+ IpfTimerLib.c
+
+
+[Packages]
+ MdePkg/MdePkg.dec
+ UefiCpuPkg/UefiCpuPkg.dec
+
+[LibraryClasses]
+ BaseLib
+
+[LibraryClasses.IA32, LibraryClasses.X64]
+ PcdLib
+ DebugLib
+ LocalApicLib
+
+[LibraryClasses.IPF]
+ PalLib
+
+
+[Pcd.IA32, Pcd.X64]
+ gEfiMdePkgTokenSpaceGuid.PcdFSBClock ## CONSUMES
+
diff --git a/UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/X86TimerLib.c b/UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/X86TimerLib.c new file mode 100644 index 0000000..3ca3ca8 --- /dev/null +++ b/UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/X86TimerLib.c @@ -0,0 +1,195 @@ +/** @file
+ Timer Library functions built upon local APIC on IA32/x64.
+
+ This library uses the local APIC library so that it supports x2APIC mode.
+
+ Copyright (c) 2010, 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 <Base.h>
+#include <Library/TimerLib.h>
+#include <Library/BaseLib.h>
+#include <Library/PcdLib.h>
+#include <Library/DebugLib.h>
+#include <Library/LocalApicLib.h>
+
+/**
+ Internal function to return the frequency of the local APIC timer.
+
+ @return The frequency of the timer in Hz.
+
+**/
+UINT32
+EFIAPI
+InternalX86GetTimerFrequency (
+ VOID
+ )
+{
+ UINTN Divisor;
+
+ GetApicTimerState (&Divisor, NULL, NULL);
+ return PcdGet32(PcdFSBClock) / (UINT32)Divisor;
+}
+
+/**
+ 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
+EFIAPI
+InternalX86Delay (
+ IN UINT32 Delay
+ )
+{
+ INT32 Ticks;
+ UINT32 PowerOfTwoCounter;
+
+ //
+ // The target timer count is calculated here
+ //
+ Ticks = GetApicTimerCurrentCount () - Delay;
+
+ //
+ // Wait until time out
+ // Delay > 2^31 could not be handled by this function
+ // Timer wrap-arounds are handled correctly by this function
+ //
+ PowerOfTwoCounter = GetPowerOfTwo32 (GetApicTimerInitCount ());
+ while (((UINT32)(GetApicTimerCurrentCount () - Ticks) & PowerOfTwoCounter) == 0) {
+ CpuPause ();
+ }
+}
+
+/**
+ Stalls the CPU for at least the given number of microseconds.
+
+ Stalls the CPU for the number of microseconds specified by MicroSeconds.
+
+ @param MicroSeconds The minimum number of microseconds to delay.
+
+ @return The value of MicroSeconds inputted.
+
+**/
+UINTN
+EFIAPI
+MicroSecondDelay (
+ IN UINTN MicroSeconds
+ )
+{
+ InternalX86Delay (
+ (UINT32)DivU64x32 (
+ MultU64x64 (
+ InternalX86GetTimerFrequency (),
+ MicroSeconds
+ ),
+ 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 The value of NanoSeconds inputted.
+
+**/
+UINTN
+EFIAPI
+NanoSecondDelay (
+ IN UINTN NanoSeconds
+ )
+{
+ InternalX86Delay (
+ (UINT32)DivU64x32 (
+ MultU64x64 (
+ InternalX86GetTimerFrequency (),
+ NanoSeconds
+ ),
+ 1000000000u
+ )
+ );
+ return NanoSeconds;
+}
+
+/**
+ 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 (UINT64)GetApicTimerCurrentCount ();
+}
+
+/**
+ 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 immediately after is it rolls over is returned in StartValue. If
+ EndValue is not NULL, then the value that the performance counter end with
+ immediately before it rolls over is returned in EndValue. The 64-bit
+ frequency of the performance counter in Hz is always returned. If StartValue
+ is less than EndValue, then the performance counter counts up. If StartValue
+ is greater than EndValue, then the performance counter counts down. For
+ example, a 64-bit free running counter that counts up would have a StartValue
+ 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 before
+ it rolls over.
+
+ @return The frequency in Hz.
+
+**/
+UINT64
+EFIAPI
+GetPerformanceCounterProperties (
+ OUT UINT64 *StartValue, OPTIONAL
+ OUT UINT64 *EndValue OPTIONAL
+ )
+{
+ if (StartValue != NULL) {
+ *StartValue = (UINT64)GetApicTimerInitCount ();
+ //
+ // make sure StartValue is all 1s from High Bit
+ //
+ ASSERT ((*StartValue & (*StartValue + 1)) == 0);
+ }
+
+ if (EndValue != NULL) {
+ *EndValue = 0;
+ }
+
+ return (UINT64) InternalX86GetTimerFrequency ();
+}
diff --git a/UefiCpuPkg/UefiCpuPkg.dsc b/UefiCpuPkg/UefiCpuPkg.dsc index c414ae8..12207f6 100644 --- a/UefiCpuPkg/UefiCpuPkg.dsc +++ b/UefiCpuPkg/UefiCpuPkg.dsc @@ -68,6 +68,7 @@ [Components]
UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
UefiCpuPkg/CpuIoPei/CpuIoPei.inf
+ UefiCpuPkg/Library/SecPeiDxeTimerLibUefiCpu/SecPeiDxeTimerLibUefiCpu.inf
[Components.IA32, Components.X64]
UefiCpuPkg/CpuDxe/CpuDxe.inf
|