diff options
Diffstat (limited to 'Omap35xxPkg/TimerDxe/Timer.c')
| -rw-r--r-- | Omap35xxPkg/TimerDxe/Timer.c | 118 |
1 files changed, 59 insertions, 59 deletions
diff --git a/Omap35xxPkg/TimerDxe/Timer.c b/Omap35xxPkg/TimerDxe/Timer.c index bc3d9b0aba..8b56d457e4 100644 --- a/Omap35xxPkg/TimerDxe/Timer.c +++ b/Omap35xxPkg/TimerDxe/Timer.c @@ -2,14 +2,14 @@ Template for Timer Architecture Protocol driver of the ARM flavor
Copyright (c) 2008 - 2009, Apple Inc. 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.
+ 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.
**/
@@ -61,7 +61,7 @@ volatile UINTN gVector; what source means.
@param SystemContext Pointer to system register context. Mostly used by debuggers and will
- update the system context after the return from the interrupt if
+ update the system context after the return from the interrupt if
modified. Don't change these values unless you know what you are doing
**/
@@ -69,7 +69,7 @@ VOID EFIAPI
TimerInterruptHandler (
IN HARDWARE_INTERRUPT_SOURCE Source,
- IN EFI_SYSTEM_CONTEXT SystemContext
+ IN EFI_SYSTEM_CONTEXT SystemContext
)
{
EFI_TPL OriginalTPL;
@@ -77,9 +77,9 @@ TimerInterruptHandler ( //
- // DXE core uses this callback for the EFI timer tick. The DXE core uses locks
+ // DXE core uses this callback for the EFI timer tick. The DXE core uses locks
// that raise to TPL_HIGH and then restore back to current level. Thus we need
- // to make sure TPL level is set to TPL_HIGH while we are handling the timer tick.
+ // to make sure TPL level is set to TPL_HIGH while we are handling the timer tick.
//
OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL);
@@ -88,7 +88,7 @@ TimerInterruptHandler ( }
// Clear all timer interrupts
- MmioWrite32 (TISR, TISR_CLEAR_ALL);
+ MmioWrite32 (TISR, TISR_CLEAR_ALL);
// Poll interrupt status bits to ensure clearing
while ((MmioRead32 (TISR) & TISR_ALL_INTERRUPT_MASK) != TISR_NO_INTERRUPTS_PENDING);
@@ -97,16 +97,16 @@ TimerInterruptHandler ( }
/**
- 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
+ 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.
@param This The EFI_TIMER_ARCH_PROTOCOL instance.
@@ -146,17 +146,17 @@ TimerDriverRegisterHandler ( /**
- 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.
+ 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.
@param This The EFI_TIMER_ARCH_PROTOCOL instance.
@param TimerPeriod The rate to program the timer interrupt in 100 nS units. If
@@ -182,13 +182,13 @@ TimerDriverSetTimerPeriod ( EFI_STATUS Status;
UINT64 TimerCount;
INT32 LoadValue;
-
+
if (TimerPeriod == 0) {
// Turn off GPTIMER3
MmioWrite32 (TCLR, TCLR_ST_OFF);
-
- Status = gInterrupt->DisableInterruptSource(gInterrupt, gVector);
- } else {
+
+ Status = gInterrupt->DisableInterruptSource(gInterrupt, gVector);
+ } else {
// Calculate required timer count
TimerCount = DivU64x32(TimerPeriod * 100, PcdGet32(PcdEmbeddedPerformanceCounterPeriodInNanoseconds));
@@ -203,7 +203,7 @@ TimerDriverSetTimerPeriod ( // Turn on GPTIMER3, it will reload at overflow
MmioWrite32 (TCLR, TCLR_AR_AUTORELOAD | TCLR_ST_ON);
- Status = gInterrupt->EnableInterruptSource(gInterrupt, gVector);
+ Status = gInterrupt->EnableInterruptSource(gInterrupt, gVector);
}
//
@@ -215,9 +215,9 @@ TimerDriverSetTimerPeriod ( /**
- 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
+ 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.
@param This The EFI_TIMER_ARCH_PROTOCOL instance.
@@ -245,12 +245,12 @@ TimerDriverGetTimerPeriod ( }
/**
- 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
+ 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.
@param This The EFI_TIMER_ARCH_PROTOCOL instance.
@@ -273,24 +273,24 @@ TimerDriverGenerateSoftInterrupt ( Interface stucture for the Timer Architectural Protocol.
@par Protocol Description:
- This protocol provides the services to initialize a periodic timer
+ This protocol provides the services to initialize a periodic timer
interrupt, and to register a handler that is called each time the timer
interrupt fires. It may also provide a service to adjust the rate of the
- periodic timer interrupt. When a timer interrupt occurs, the handler is
- passed the amount of time that has passed since the previous timer
+ periodic timer interrupt. When a timer interrupt occurs, the handler is
+ passed the amount of time that has passed since the previous timer
interrupt.
@param RegisterHandler
- Registers a handler that will be called each time the
- timer interrupt fires. TimerPeriod defines the minimum
- time between timer interrupts, so TimerPeriod will also
- be the minimum time between calls to the registered
+ Registers a handler that will be called each time the
+ timer interrupt fires. TimerPeriod defines the minimum
+ time between timer interrupts, so TimerPeriod will also
+ be the minimum time between calls to the registered
handler.
@param SetTimerPeriod
- Sets the period of the timer interrupt in 100 nS units.
- This function is optional, and may return EFI_UNSUPPORTED.
- If this function is supported, then the timer period will
+ Sets the period of the timer interrupt in 100 nS units.
+ This function is optional, and may return EFI_UNSUPPORTED.
+ If this function is supported, then the timer period will
be rounded up to the nearest supported timer period.
@@ -298,8 +298,8 @@ TimerDriverGenerateSoftInterrupt ( Retrieves the period of the timer interrupt in 100 nS units.
@param GenerateSoftInterrupt
- Generates a soft timer interrupt that simulates the firing of
- the timer interrupt. This service can be used to invoke the registered handler if the timer interrupt has been masked for
+ Generates a soft timer interrupt that simulates the firing of
+ the timer interrupt. This service can be used to invoke the registered handler if the timer interrupt has been masked for
a period of time.
**/
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