diff options
Diffstat (limited to 'roms/edk2/MdeModulePkg/Universal/Metronome')
5 files changed, 262 insertions, 0 deletions
diff --git a/roms/edk2/MdeModulePkg/Universal/Metronome/Metronome.c b/roms/edk2/MdeModulePkg/Universal/Metronome/Metronome.c new file mode 100644 index 000000000..fdee1e39a --- /dev/null +++ b/roms/edk2/MdeModulePkg/Universal/Metronome/Metronome.c @@ -0,0 +1,119 @@ +/** @file
+ Produces the Metronome Architectural Protocol on top of Timer Library.
+
+ This is a generic implementation of the Metronome Architectural Protocol that
+ layers on top of an instance of the Timer Library. The Timer Library provides
+ functions for nanosecond and microsecond delays. This generic implementation
+ produces a fixed TickPeriod of 1 100ns unit, and when the WaitForTick() service
+ is called, the number of ticks passed in is converted to either nanosecond or
+ microsecond units. If the number of ticks is small, then nanoseconds are used.
+ If the number of ticks is large, then microseconds are used. This prevents
+ overflows that could occur for long delays if only nanoseconds were used and also
+ provides the greatest accuracy for small delays.
+
+Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "Metronome.h"
+
+//
+// Handle for the Metronome Architectural Protocol instance produced by this driver
+//
+EFI_HANDLE mMetronomeHandle = NULL;
+
+//
+// The Metronome Architectural Protocol instance produced by this driver
+//
+EFI_METRONOME_ARCH_PROTOCOL mMetronome = {
+ WaitForTick,
+ 1 // TickPeriod = 1*100 ns units
+};
+
+/**
+ Waits for the specified number of ticks.
+
+ This function implements EFI_METRONOME_ARCH_PROTOCOL.WaitForTick().
+ The WaitForTick() function waits for the number of ticks specified by
+ TickNumber from a known time source in the platform. If TickNumber of
+ ticks are detected, then EFI_SUCCESS is returned. The actual time passed
+ between entry of this function and the first tick is between 0 and
+ TickPeriod 100 nS units. If you want to guarantee that at least TickPeriod
+ time has elapsed, wait for two ticks. This function waits for a hardware
+ event to determine when a tick occurs. It is possible for interrupt
+ processing, or exception processing to interrupt the execution of the
+ WaitForTick() function. Depending on the hardware source for the ticks, it
+ is possible for a tick to be missed. This function cannot guarantee that
+ ticks will not be missed. If a timeout occurs waiting for the specified
+ number of ticks, then EFI_TIMEOUT is returned.
+
+ @param This The EFI_METRONOME_ARCH_PROTOCOL instance.
+ @param TickNumber Number of ticks to wait.
+
+ @retval EFI_SUCCESS The wait for the number of ticks specified by TickNumber
+ succeeded.
+ @retval EFI_TIMEOUT A timeout occurred waiting for the specified number of ticks.
+
+**/
+EFI_STATUS
+EFIAPI
+WaitForTick (
+ IN EFI_METRONOME_ARCH_PROTOCOL *This,
+ IN UINT32 TickNumber
+ )
+{
+ //
+ // Check the value of TickNumber, so a 32-bit overflow can be avoided
+ // when TickNumber of converted to nanosecond units
+ //
+ if (TickNumber < 10000000) {
+ //
+ // If TickNumber is small, then use NanoSecondDelay()
+ //
+ NanoSecondDelay (TickNumber * 100);
+ } else {
+ //
+ // If TickNumber is large, then use MicroSecondDelay()
+ //
+ MicroSecondDelay (TickNumber / 10);
+ }
+ return EFI_SUCCESS;
+}
+
+/**
+ The user Entry Point for module Metronome. The user code starts with this function.
+
+ @param[in] ImageHandle The firmware allocated handle for the EFI image.
+ @param[in] SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The entry point is executed successfully.
+ @retval other Some error occurs when executing this entry point.
+
+**/
+EFI_STATUS
+EFIAPI
+InstallMetronome (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // Make sure the Metronome Architectural Protocol is not already installed in the system
+ //
+ ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiMetronomeArchProtocolGuid);
+
+ //
+ // Install on a new handle
+ //
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &mMetronomeHandle,
+ &gEfiMetronomeArchProtocolGuid, &mMetronome,
+ NULL
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
diff --git a/roms/edk2/MdeModulePkg/Universal/Metronome/Metronome.h b/roms/edk2/MdeModulePkg/Universal/Metronome/Metronome.h new file mode 100644 index 000000000..7017e34ea --- /dev/null +++ b/roms/edk2/MdeModulePkg/Universal/Metronome/Metronome.h @@ -0,0 +1,51 @@ +/** @file
+ Include file of Metronome driver.
+
+Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _METRONOME_H_
+#define _METRONOME_H_
+
+#include <PiDxe.h>
+#include <Protocol/Metronome.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/TimerLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+
+/**
+ Waits for the specified number of ticks.
+
+ This function implements EFI_METRONOME_ARCH_PROTOCOL.WaitForTick().
+ The WaitForTick() function waits for the number of ticks specified by
+ TickNumber from a known time source in the platform. If TickNumber of
+ ticks are detected, then EFI_SUCCESS is returned. The actual time passed
+ between entry of this function and the first tick is between 0 and
+ TickPeriod 100 nS units. If you want to guarantee that at least TickPeriod
+ time has elapsed, wait for two ticks. This function waits for a hardware
+ event to determine when a tick occurs. It is possible for interrupt
+ processing, or exception processing to interrupt the execution of the
+ WaitForTick() function. Depending on the hardware source for the ticks, it
+ is possible for a tick to be missed. This function cannot guarantee that
+ ticks will not be missed. If a timeout occurs waiting for the specified
+ number of ticks, then EFI_TIMEOUT is returned.
+
+ @param This The EFI_METRONOME_ARCH_PROTOCOL instance.
+ @param TickNumber Number of ticks to wait.
+
+ @retval EFI_SUCCESS The wait for the number of ticks specified by TickNumber
+ succeeded.
+ @retval EFI_TIMEOUT A timeout occurred waiting for the specified number of ticks.
+
+**/
+EFI_STATUS
+EFIAPI
+WaitForTick (
+ IN EFI_METRONOME_ARCH_PROTOCOL *This,
+ IN UINT32 TickNumber
+ );
+
+#endif
diff --git a/roms/edk2/MdeModulePkg/Universal/Metronome/Metronome.inf b/roms/edk2/MdeModulePkg/Universal/Metronome/Metronome.inf new file mode 100644 index 000000000..6d5de0c2a --- /dev/null +++ b/roms/edk2/MdeModulePkg/Universal/Metronome/Metronome.inf @@ -0,0 +1,54 @@ +## @file
+# This module produces the Metronome Architectural Protocol on top of Timer Library.
+#
+# This is a generic implementation of the Metronome Architectural Protocol that
+# layers on top of an instance of the Timer Library. The Timer Library provides
+# functions for nanosecond and microsecond delays. This generic implementation
+# produces a fixed TickPeriod of 100ns unit, and when the WaitForTick() service
+# is called, the number of ticks passed in is converted to either nanosecond or
+# microsecond units. If the number of ticks is small, then nanoseconds are used.
+# If the number of ticks is large, then microseconds are used. This prevents
+# overflows that could occur for long delays if only nanoseconds were used and also
+# provides the greatest accuracy for small delays.
+#
+# Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = Metronome
+ MODULE_UNI_FILE = Metronome.uni
+ FILE_GUID = C8339973-A563-4561-B858-D8476F9DEFC4
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = InstallMetronome
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 EBC
+#
+
+[Packages]
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ UefiDriverEntryPoint
+ UefiBootServicesTableLib
+ TimerLib
+ DebugLib
+
+[Sources]
+ Metronome.c
+ Metronome.h
+
+[Protocols]
+ gEfiMetronomeArchProtocolGuid ## PRODUCES
+
+[Depex]
+ TRUE
+
+[UserExtensions.TianoCore."ExtraFiles"]
+ MetronomeExtra.uni
diff --git a/roms/edk2/MdeModulePkg/Universal/Metronome/Metronome.uni b/roms/edk2/MdeModulePkg/Universal/Metronome/Metronome.uni new file mode 100644 index 000000000..6f23db2df --- /dev/null +++ b/roms/edk2/MdeModulePkg/Universal/Metronome/Metronome.uni @@ -0,0 +1,24 @@ +// /** @file
+// This module produces the Metronome Architectural Protocol on top of Timer Library.
+//
+// This is a generic implementation of the Metronome Architectural Protocol that
+// layers on top of an instance of the Timer Library. The Timer Library provides
+// functions for nanosecond and microsecond delays. This generic implementation
+// produces a fixed TickPeriod of 100ns unit, and when the WaitForTick() service
+// is called, the number of ticks passed in is converted to either nanosecond or
+// microsecond units. If the number of ticks is small, then nanoseconds are used.
+// If the number of ticks is large, then microseconds are used. This prevents
+// overflows that could occur for long delays if only nanoseconds were used and also
+// provides the greatest accuracy for small delays.
+//
+// Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT #language en-US "Produces the Metronome Architectural Protocol on top of Timer Library"
+
+#string STR_MODULE_DESCRIPTION #language en-US "This is a generic implementation of the Metronome Architectural Protocol that layers on top of an instance of the Timer Library. The Timer Library provides functions for nanosecond and microsecond delays. This generic implementation produces a fixed TickPeriod of 100ns unit, and when the WaitForTick() service is called, the number of ticks passed in is converted to either nanosecond or microsecond units. If the number of ticks is small, then nanoseconds are used. If the number of ticks is large, then microseconds are used. This prevents overflows that could occur for long delays if only nanoseconds were used and also provides the greatest accuracy for small delays."
+
diff --git a/roms/edk2/MdeModulePkg/Universal/Metronome/MetronomeExtra.uni b/roms/edk2/MdeModulePkg/Universal/Metronome/MetronomeExtra.uni new file mode 100644 index 000000000..3d2b57dbc --- /dev/null +++ b/roms/edk2/MdeModulePkg/Universal/Metronome/MetronomeExtra.uni @@ -0,0 +1,14 @@ +// /** @file
+// Metronome Localized Strings and Content
+//
+// Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+#string STR_PROPERTIES_MODULE_NAME
+#language en-US
+"Metronome/Timer DXE Driver"
+
+
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