diff options
| author | qwang12 <qwang12@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-07-03 02:34:30 +0000 |
|---|---|---|
| committer | qwang12 <qwang12@6f19259b-4bc3-4df7-8a09-765794883524> | 2007-07-03 02:34:30 +0000 |
| commit | 1897b70ba80e0118f09fa97c3d57e4a0acc79c4e (patch) | |
| tree | a01c5162e13d72605fc87c615a3906821ffcdb2e /Nt32Pkg/MetronomeDxe/Metronome.c | |
| parent | ca34da0766fcf2e0be1250a556f4b41968b0539d (diff) | |
| download | edk2-platforms-1897b70ba80e0118f09fa97c3d57e4a0acc79c4e.tar.xz | |
Change MonotonicCounterRuntimeDxe to MetronomeDxe. This is a typo ininitally. MonotonicCounterRuntimeDxe should be in MdeModulePkg.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2974 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'Nt32Pkg/MetronomeDxe/Metronome.c')
| -rw-r--r-- | Nt32Pkg/MetronomeDxe/Metronome.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/Nt32Pkg/MetronomeDxe/Metronome.c b/Nt32Pkg/MetronomeDxe/Metronome.c new file mode 100644 index 0000000000..b02741b45c --- /dev/null +++ b/Nt32Pkg/MetronomeDxe/Metronome.c @@ -0,0 +1,134 @@ +/*++
+
+Copyright (c) 2006, 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.
+
+Module Name:
+
+ Metronome.c
+
+Abstract:
+
+ NT Emulation Metronome Architectural Protocol Driver as defined in DXE CIS
+
+--*/
+
+//
+// Include common header file for this module.
+//
+#include "CommonHeader.h"
+
+#include "Metronome.h"
+
+//
+// Global Variables
+//
+EFI_METRONOME_ARCH_PROTOCOL mMetronome = {
+ WinNtMetronomeDriverWaitForTick,
+ TICK_PERIOD
+};
+
+//
+// Worker Functions
+//
+
+EFI_STATUS
+EFIAPI
+WinNtMetronomeDriverWaitForTick (
+ IN EFI_METRONOME_ARCH_PROTOCOL *This,
+ IN UINT32 TickNumber
+ )
+/*++
+
+Routine Description:
+
+ 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.
+
+Arguments:
+
+ This - The EFI_METRONOME_ARCH_PROTOCOL instance.
+ TickNumber - Number of ticks to wait.
+
+Returns:
+
+ EFI_SUCCESS - The wait for the number of ticks specified by TickNumber
+ succeeded.
+
+--*/
+{
+ UINT64 SleepTime;
+
+ //
+ // Calculate the time to sleep. Win API smallest unit to sleep is 1 millisec
+ // Tick Period is in 100ns units, divide by 10000 to convert to ms
+ //
+ SleepTime = DivU64x32 (MultU64x32 ((UINT64) TickNumber, TICK_PERIOD) + 9999, 10000);
+ gWinNt->Sleep ((UINT32) SleepTime);
+
+ return EFI_SUCCESS;
+}
+
+
+EFI_STATUS
+EFIAPI
+WinNtMetronomeDriverInitialize (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+/*++
+
+Routine Description:
+
+ Initialize the Metronome Architectural Protocol driver
+
+Arguments:
+
+ ImageHandle - ImageHandle of the loaded driver
+
+
+ SystemTable - Pointer to the System Table
+
+Returns:
+
+ EFI_SUCCESS - Metronome Architectural Protocol created
+
+ EFI_OUT_OF_RESOURCES - Not enough resources available to initialize driver.
+
+ EFI_DEVICE_ERROR - A device error occured attempting to initialize the driver.
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_HANDLE Handle;
+
+
+ //
+ // Install the Metronome Architectural Protocol onto a new handle
+ //
+ Handle = NULL;
+ Status = gBS->InstallProtocolInterface (
+ &Handle,
+ &gEfiMetronomeArchProtocolGuid,
+ EFI_NATIVE_INTERFACE,
+ &mMetronome
+ );
+
+ return Status;
+}
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