diff options
Diffstat (limited to 'EmulatorPkg/Library/DxeTimerLib')
| -rw-r--r-- | EmulatorPkg/Library/DxeTimerLib/DxeTimerLib.c | 206 | ||||
| -rw-r--r-- | EmulatorPkg/Library/DxeTimerLib/DxeTimerLib.inf | 51 |
2 files changed, 257 insertions, 0 deletions
diff --git a/EmulatorPkg/Library/DxeTimerLib/DxeTimerLib.c b/EmulatorPkg/Library/DxeTimerLib/DxeTimerLib.c new file mode 100644 index 0000000000..14bb17f00e --- /dev/null +++ b/EmulatorPkg/Library/DxeTimerLib/DxeTimerLib.c @@ -0,0 +1,206 @@ +/** @file
+ A non-functional instance of the Timer Library.
+
+ Copyright (c) 2007 - 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 <PiPei.h>
+#include <Library/BaseLib.h>
+#include <Library/TimerLib.h>
+#include <Library/DebugLib.h>
+#include <Library/EmuThunkLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+
+#include <Protocol/Timer.h>
+
+
+STATIC UINT64 gTimerPeriod = 0;
+STATIC EFI_TIMER_ARCH_PROTOCOL *gTimerAp = NULL;
+STATIC EFI_EVENT gTimerEvent = NULL;
+STATIC VOID *gRegistration = NULL;
+
+VOID
+EFIAPI
+RegisterTimerArchProtocol (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ EFI_STATUS Status;
+
+ Status = gBS->LocateProtocol (&gEfiTimerArchProtocolGuid, NULL, (VOID **)&gTimerAp);
+ if (!EFI_ERROR (Status)) {
+ Status = gTimerAp->GetTimerPeriod (gTimerAp, &gTimerPeriod);
+ ASSERT_EFI_ERROR (Status);
+
+ // Convert to Nanoseconds.
+ gTimerPeriod = MultU64x32 (gTimerPeriod, 100);
+
+ if (gTimerEvent == NULL) {
+ Status = gBS->CreateEvent (EVT_TIMER, 0, NULL, NULL, (VOID **)&gTimerEvent);
+ ASSERT_EFI_ERROR (Status);
+ }
+ }
+}
+
+
+
+/**
+ 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
+ )
+{
+ return NanoSecondDelay (MicroSeconds * 1000);
+}
+
+
+/**
+ 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
+ )
+{
+ EFI_STATUS Status;
+ UINT64 HundredNanoseconds;
+ UINTN Index;
+
+ if ((gTimerPeriod != 0) &&
+ ((UINT64)NanoSeconds > gTimerPeriod) &&
+ (EfiGetCurrentTpl () == TPL_APPLICATION)) {
+ //
+ // This stall is long, so use gBS->WaitForEvent () to yield CPU to DXE Core
+ //
+
+ HundredNanoseconds = DivU64x32 (NanoSeconds, 100);
+ Status = gBS->SetTimer (gTimerEvent, TimerRelative, HundredNanoseconds);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gBS->WaitForEvent (sizeof (gTimerEvent)/sizeof (EFI_EVENT), &gTimerEvent, &Index);
+ ASSERT_EFI_ERROR (Status);
+
+ } else {
+ gEmuThunk->Sleep (NanoSeconds);
+ }
+ 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 gEmuThunk->QueryPerformanceCounter ();
+}
+
+/**
+ 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 = 0ULL;
+ }
+ if (EndValue != NULL) {
+ *EndValue = (UINT64)-1LL;
+ }
+
+ return gEmuThunk->QueryPerformanceFrequency ();
+}
+
+
+/**
+ Register for the Timer AP protocol.
+
+ @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
+DxeTimerLibConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EfiCreateProtocolNotifyEvent (
+ &gEfiTimerArchProtocolGuid,
+ TPL_CALLBACK,
+ RegisterTimerArchProtocol,
+ NULL,
+ &gRegistration
+ );
+
+ return EFI_SUCCESS;
+}
+
diff --git a/EmulatorPkg/Library/DxeTimerLib/DxeTimerLib.inf b/EmulatorPkg/Library/DxeTimerLib/DxeTimerLib.inf new file mode 100644 index 0000000000..51479373ff --- /dev/null +++ b/EmulatorPkg/Library/DxeTimerLib/DxeTimerLib.inf @@ -0,0 +1,51 @@ +## @file
+# NULL instance of Timer Library as a template.
+#
+# A non-functional instance of the Timer Library that can be used as a template
+# for the implementation of a functional timer library instance. This library instance can
+# also be used to test build DXE, Runtime, DXE SAL, and DXE SMM modules that require timer
+# services as well as EBC modules that require timer services.
+#
+# Copyright (c) 2007 - 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 = EmuDxeTimerLib
+ FILE_GUID = 74B62391-AD0D-1B4D-8784-151404F9D538
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = TimerLib|DXE_DRIVER DXE_RUNTIME_DRIVER UEFI_DRIVER UEFI_APPLICATION
+
+ CONSTRUCTOR = DxeTimerLibConstructor
+
+#
+# VALID_ARCHITECTURES = IA32 X64 IPF EBC
+#
+
+[Sources]
+ DxeTimerLib.c
+
+
+[Packages]
+ MdePkg/MdePkg.dec
+ EmulatorPkg/EmulatorPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ DebugLib
+ EmuThunkLib
+ UefiLib
+ UefiBootServicesTableLib
+
+[Protocols]
+ gEfiTimerArchProtocolGuid
|