diff options
Diffstat (limited to 'OvmfPkg/8254TimerDxe/Timer.c')
| -rw-r--r-- | OvmfPkg/8254TimerDxe/Timer.c | 44 |
1 files changed, 23 insertions, 21 deletions
diff --git a/OvmfPkg/8254TimerDxe/Timer.c b/OvmfPkg/8254TimerDxe/Timer.c index fd1691beb3..e49a438b44 100644 --- a/OvmfPkg/8254TimerDxe/Timer.c +++ b/OvmfPkg/8254TimerDxe/Timer.c @@ -11,12 +11,12 @@ SPDX-License-Identifier: BSD-2-Clause-Patent //
// The handle onto which the Timer Architectural Protocol will be installed
//
-EFI_HANDLE mTimerHandle = NULL;
+EFI_HANDLE mTimerHandle = NULL;
//
// The Timer Architectural Protocol that this driver produces
//
-EFI_TIMER_ARCH_PROTOCOL mTimer = {
+EFI_TIMER_ARCH_PROTOCOL mTimer = {
TimerDriverRegisterHandler,
TimerDriverSetTimerPeriod,
TimerDriverGetTimerPeriod,
@@ -26,7 +26,7 @@ EFI_TIMER_ARCH_PROTOCOL mTimer = { //
// Pointer to the CPU Architectural Protocol instance
//
-EFI_CPU_ARCH_PROTOCOL *mCpu;
+EFI_CPU_ARCH_PROTOCOL *mCpu;
//
// Pointer to the Legacy 8259 Protocol instance
@@ -37,16 +37,17 @@ EFI_LEGACY_8259_PROTOCOL *mLegacy8259; // The notification function to call on every timer interrupt.
// A bug in the compiler prevents us from initializing this here.
//
-EFI_TIMER_NOTIFY mTimerNotifyFunction;
+EFI_TIMER_NOTIFY mTimerNotifyFunction;
//
// The current period of the timer interrupt
//
-volatile UINT64 mTimerPeriod = 0;
+volatile UINT64 mTimerPeriod = 0;
//
// Worker Functions
//
+
/**
Sets the counter value for Timer #0 in a legacy 8254 timer.
@@ -71,11 +72,11 @@ SetPitCount ( VOID
EFIAPI
TimerInterruptHandler (
- IN EFI_EXCEPTION_TYPE InterruptType,
- IN EFI_SYSTEM_CONTEXT SystemContext
+ IN EFI_EXCEPTION_TYPE InterruptType,
+ IN EFI_SYSTEM_CONTEXT SystemContext
)
{
- EFI_TPL OriginalTPL;
+ EFI_TPL OriginalTPL;
OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL);
@@ -133,11 +134,11 @@ TimerDriverRegisterHandler ( //
// Check for invalid parameters
//
- if (NotifyFunction == NULL && mTimerNotifyFunction == NULL) {
+ if ((NotifyFunction == NULL) && (mTimerNotifyFunction == NULL)) {
return EFI_INVALID_PARAMETER;
}
- if (NotifyFunction != NULL && mTimerNotifyFunction != NULL) {
+ if ((NotifyFunction != NULL) && (mTimerNotifyFunction != NULL)) {
return EFI_ALREADY_STARTED;
}
@@ -203,29 +204,30 @@ TimerDriverSetTimerPeriod ( //
mLegacy8259->DisableIrq (mLegacy8259, Efi8259Irq0);
} else {
-
//
// Convert TimerPeriod into 8254 counts
//
- TimerCount = DivU64x32 (MultU64x32 (119318, (UINT32) TimerPeriod) + 500000, 1000000);
+ TimerCount = DivU64x32 (MultU64x32 (119318, (UINT32)TimerPeriod) + 500000, 1000000);
//
// Check for overflow
//
if (TimerCount >= 65536) {
- TimerCount = 0;
+ TimerCount = 0;
TimerPeriod = MAX_TIMER_TICK_DURATION;
}
+
//
// Program the 8254 timer with the new count value
//
- SetPitCount ((UINT16) TimerCount);
+ SetPitCount ((UINT16)TimerCount);
//
// Enable timer interrupt
//
mLegacy8259->EnableIrq (mLegacy8259, Efi8259Irq0, FALSE);
}
+
//
// Save the new timer period
//
@@ -253,8 +255,8 @@ TimerDriverSetTimerPeriod ( EFI_STATUS
EFIAPI
TimerDriverGetTimerPeriod (
- IN EFI_TIMER_ARCH_PROTOCOL *This,
- OUT UINT64 *TimerPeriod
+ IN EFI_TIMER_ARCH_PROTOCOL *This,
+ OUT UINT64 *TimerPeriod
)
{
if (TimerPeriod == NULL) {
@@ -353,13 +355,13 @@ TimerDriverInitialize ( //
// Find the CPU architectural protocol.
//
- Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **) &mCpu);
+ Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **)&mCpu);
ASSERT_EFI_ERROR (Status);
//
// Find the Legacy8259 protocol.
//
- Status = gBS->LocateProtocol (&gEfiLegacy8259ProtocolGuid, NULL, (VOID **) &mLegacy8259);
+ Status = gBS->LocateProtocol (&gEfiLegacy8259ProtocolGuid, NULL, (VOID **)&mLegacy8259);
ASSERT_EFI_ERROR (Status);
//
@@ -372,7 +374,7 @@ TimerDriverInitialize ( // Get the interrupt vector number corresponding to IRQ0 from the 8259 driver
//
TimerVector = 0;
- Status = mLegacy8259->GetVector (mLegacy8259, Efi8259Irq0, (UINT8 *) &TimerVector);
+ Status = mLegacy8259->GetVector (mLegacy8259, Efi8259Irq0, (UINT8 *)&TimerVector);
ASSERT_EFI_ERROR (Status);
//
@@ -392,11 +394,11 @@ TimerDriverInitialize ( //
Status = gBS->InstallMultipleProtocolInterfaces (
&mTimerHandle,
- &gEfiTimerArchProtocolGuid, &mTimer,
+ &gEfiTimerArchProtocolGuid,
+ &mTimer,
NULL
);
ASSERT_EFI_ERROR (Status);
return Status;
}
-
|