diff options
| author | eric_tian <eric_tian@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-06-30 05:08:49 +0000 |
|---|---|---|
| committer | eric_tian <eric_tian@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-06-30 05:08:49 +0000 |
| commit | 804405e7d10525e41720216137b2551f62a0663f (patch) | |
| tree | a615301e36e63aba81adcb0a963e4d3aa7830863 /UnixPkg/TimerDxe/Timer.c | |
| parent | 27d55a2d56320e6e7a1dda2b02089721540d6bc3 (diff) | |
| download | edk2-platforms-804405e7d10525e41720216137b2551f62a0663f.tar.xz | |
Port EdkUnixPkg to UnixPkg. The changes are listed as follows:
1. change *.msa to *.inf, and create platform configuration files .dec&.dsc&.fdf to comply with Edk2 build process
2. using PCD mechanism to replace macro.
3. change Sec code to cowork with PI1.0 Pei Core and produce temparory memory ppi.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5380 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'UnixPkg/TimerDxe/Timer.c')
| -rw-r--r-- | UnixPkg/TimerDxe/Timer.c | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/UnixPkg/TimerDxe/Timer.c b/UnixPkg/TimerDxe/Timer.c new file mode 100644 index 0000000000..53b5656f7c --- /dev/null +++ b/UnixPkg/TimerDxe/Timer.c @@ -0,0 +1,374 @@ +/*++
+
+Copyright (c) 2004, 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:
+
+ Timer.c
+
+Abstract:
+
+ UNIX Emulation Timer Architectural Protocol Driver as defined in DXE CIS
+
+ This Timer module uses an UNIX Thread to simulate the timer-tick driven
+ timer service. In the future, the Thread creation should possibly be
+ abstracted by the CPU architectural protocol
+
+--*/
+#include "PiDxe.h"
+#include <Protocol/Timer.h>
+#include <Protocol/Cpu.h>
+#include "Timer.h"
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include "UnixDxe.h"
+#include <Library/UnixLib.h>
+
+//
+// Pointer to the CPU Architectural Protocol instance
+//
+EFI_CPU_ARCH_PROTOCOL *mCpu;
+
+//
+// The Timer Architectural Protocol that this driver produces
+//
+EFI_TIMER_ARCH_PROTOCOL mTimer = {
+ UnixTimerDriverRegisterHandler,
+ UnixTimerDriverSetTimerPeriod,
+ UnixTimerDriverGetTimerPeriod,
+ UnixTimerDriverGenerateSoftInterrupt
+};
+
+//
+// The notification function to call on every timer interrupt
+//
+EFI_TIMER_NOTIFY mTimerNotifyFunction = NULL;
+
+//
+// The current period of the timer interrupt
+//
+UINT64 mTimerPeriodMs;
+
+
+VOID
+TimerCallback (UINT64 DeltaMs) +/*++
+
+Routine Description:
+
+ TODO: Add function description
+
+Arguments:
+
+ wTimerID - TODO: add argument description
+ msg - TODO: add argument description
+ dwUser - TODO: add argument description
+ dw1 - TODO: add argument description
+ dw2 - TODO: add argument description
+
+Returns:
+
+ TODO: add return values
+
+--*/
+{
+ EFI_TPL OriginalTPL;
+ EFI_TIMER_NOTIFY CallbackFunction; + +
+ OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL);
+
+ if (OriginalTPL < TPL_HIGH_LEVEL) { + CallbackFunction = mTimerNotifyFunction;
+
+ //
+ // Only invoke the callback function if a Non-NULL handler has been
+ // registered. Assume all other handlers are legal.
+ //
+ if (CallbackFunction != NULL) {
+ CallbackFunction ((UINT64) (DeltaMs * 10000));
+ }
+ } +
+ gBS->RestoreTPL (OriginalTPL);
+
+}
+
+EFI_STATUS
+EFIAPI
+UnixTimerDriverRegisterHandler (
+ IN EFI_TIMER_ARCH_PROTOCOL *This,
+ IN EFI_TIMER_NOTIFY NotifyFunction
+ )
+/*++
+
+Routine Description:
+
+ This function registers the handler NotifyFunction so it is called every time
+ the timer interrupt fires. It also passes the amount of time since the last
+ handler call to the NotifyFunction. If NotifyFunction is NULL, then the
+ handler is unregistered. If the handler is registered, then EFI_SUCCESS is
+ returned. If the CPU does not support registering a timer interrupt handler,
+ then EFI_UNSUPPORTED is returned. If an attempt is made to register a handler
+ when a handler is already registered, then EFI_ALREADY_STARTED is returned.
+ If an attempt is made to unregister a handler when a handler is not registered,
+ then EFI_INVALID_PARAMETER is returned. If an error occurs attempting to
+ register the NotifyFunction with the timer interrupt, then EFI_DEVICE_ERROR
+ is returned.
+
+Arguments:
+
+ This - The EFI_TIMER_ARCH_PROTOCOL instance.
+
+ NotifyFunction - The function to call when a timer interrupt fires. This
+ function executes at TPL_HIGH_LEVEL. The DXE Core will
+ register a handler for the timer interrupt, so it can know
+ how much time has passed. This information is used to
+ signal timer based events. NULL will unregister the handler.
+
+Returns:
+
+ EFI_SUCCESS - The timer handler was registered.
+
+ EFI_UNSUPPORTED - The platform does not support timer interrupts.
+
+ EFI_ALREADY_STARTED - NotifyFunction is not NULL, and a handler is already
+ registered.
+
+ EFI_INVALID_PARAMETER - NotifyFunction is NULL, and a handler was not
+ previously registered.
+
+ EFI_DEVICE_ERROR - The timer handler could not be registered.
+
+--*/
+{
+ //
+ // Check for invalid parameters
+ //
+ if (NotifyFunction == NULL && mTimerNotifyFunction == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (NotifyFunction != NULL && mTimerNotifyFunction != NULL) {
+ return EFI_ALREADY_STARTED;
+ }
+
+ if (NotifyFunction == NULL) { + /* Disable timer. */ + gUnix->SetTimer (0, TimerCallback); + } else if (mTimerNotifyFunction == NULL) { + /* Enable Timer. */ + gUnix->SetTimer (mTimerPeriodMs, TimerCallback); + } + mTimerNotifyFunction = NotifyFunction;
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+UnixTimerDriverSetTimerPeriod (
+ IN EFI_TIMER_ARCH_PROTOCOL *This,
+ IN UINT64 TimerPeriod
+ )
+/*++
+
+Routine Description:
+
+ This function adjusts the period of timer interrupts to the value specified
+ by TimerPeriod. If the timer period is updated, then the selected timer
+ period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned. If
+ the timer hardware is not programmable, then EFI_UNSUPPORTED is returned.
+ If an error occurs while attempting to update the timer period, then the
+ timer hardware will be put back in its state prior to this call, and
+ EFI_DEVICE_ERROR is returned. If TimerPeriod is 0, then the timer interrupt
+ is disabled. This is not the same as disabling the CPU's interrupts.
+ Instead, it must either turn off the timer hardware, or it must adjust the
+ interrupt controller so that a CPU interrupt is not generated when the timer
+ interrupt fires.
+
+Arguments:
+
+ This - The EFI_TIMER_ARCH_PROTOCOL instance.
+
+ TimerPeriod - The rate to program the timer interrupt in 100 nS units. If
+ the timer hardware is not programmable, then EFI_UNSUPPORTED is
+ returned. If the timer is programmable, then the timer period
+ will be rounded up to the nearest timer period that is supported
+ by the timer hardware. If TimerPeriod is set to 0, then the
+ timer interrupts will be disabled.
+
+Returns:
+
+ EFI_SUCCESS - The timer period was changed.
+
+ EFI_UNSUPPORTED - The platform cannot change the period of the timer interrupt.
+
+ EFI_DEVICE_ERROR - The timer period could not be changed due to a device error.
+
+--*/
+{
+
+ //
+ // If TimerPeriod is 0, then the timer thread should be canceled
+ // If the TimerPeriod is valid, then create and/or adjust the period of the timer thread
+ //
+ if (TimerPeriod == 0 + || ((TimerPeriod > TIMER_MINIMUM_VALUE) + && (TimerPeriod < TIMER_MAXIMUM_VALUE))) {
+ mTimerPeriodMs = DivU64x32 (TimerPeriod + 5000, 10000);
+ + gUnix->SetTimer (mTimerPeriodMs, TimerCallback); + } +
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+UnixTimerDriverGetTimerPeriod (
+ IN EFI_TIMER_ARCH_PROTOCOL *This,
+ OUT UINT64 *TimerPeriod
+ )
+/*++
+
+Routine Description:
+
+ This function retrieves the period of timer interrupts in 100 ns units,
+ returns that value in TimerPeriod, and returns EFI_SUCCESS. If TimerPeriod
+ is NULL, then EFI_INVALID_PARAMETER is returned. If a TimerPeriod of 0 is
+ returned, then the timer is currently disabled.
+
+Arguments:
+
+ This - The EFI_TIMER_ARCH_PROTOCOL instance.
+
+ TimerPeriod - A pointer to the timer period to retrieve in 100 ns units. If
+ 0 is returned, then the timer is currently disabled.
+
+Returns:
+
+ EFI_SUCCESS - The timer period was returned in TimerPeriod.
+
+ EFI_INVALID_PARAMETER - TimerPeriod is NULL.
+
+--*/
+{
+ if (TimerPeriod == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ *TimerPeriod = mTimerPeriodMs * 10000;
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+UnixTimerDriverGenerateSoftInterrupt (
+ IN EFI_TIMER_ARCH_PROTOCOL *This
+ )
+/*++
+
+Routine Description:
+
+ This function generates a soft timer interrupt. If the platform does not support soft
+ timer interrupts, then EFI_UNSUPPORTED is returned. Otherwise, EFI_SUCCESS is returned.
+ If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.RegisterHandler()
+ service, then a soft timer interrupt will be generated. If the timer interrupt is
+ enabled when this service is called, then the registered handler will be invoked. The
+ registered handler should not be able to distinguish a hardware-generated timer
+ interrupt from a software-generated timer interrupt.
+
+Arguments:
+
+ This - The EFI_TIMER_ARCH_PROTOCOL instance.
+
+Returns:
+
+ EFI_SUCCESS - The soft timer interrupt was generated.
+
+ EFI_UNSUPPORTEDT - The platform does not support the generation of soft timer interrupts.
+
+--*/
+{
+ return EFI_UNSUPPORTED;
+}
+
+EFI_STATUS
+EFIAPI
+UnixTimerDriverInitialize (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+/*++
+
+Routine Description:
+
+ Initialize the Timer Architectural Protocol driver
+
+Arguments:
+
+ ImageHandle - ImageHandle of the loaded driver
+
+ SystemTable - Pointer to the System Table
+
+Returns:
+
+ EFI_SUCCESS - Timer 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;
+
+ //
+ // Make sure the Timer Architectural Protocol is not already installed in the system
+ //
+ ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiTimerArchProtocolGuid);
+
+ //
+ // Get the CPU Architectural Protocol instance
+ //
+ Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (void *)&mCpu);
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Install the Timer Architectural Protocol onto a new handle
+ //
+ Handle = NULL;
+ Status = gBS->InstallProtocolInterface (
+ &Handle,
+ &gEfiTimerArchProtocolGuid,
+ EFI_NATIVE_INTERFACE,
+ &mTimer
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Start the timer thread at the default timer period
+ //
+ Status = mTimer.SetTimerPeriod (&mTimer, DEFAULT_TIMER_TICK_DURATION);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ + return EFI_SUCCESS;
+}
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