diff options
| -rw-r--r-- | PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c | 118 |
1 files changed, 81 insertions, 37 deletions
diff --git a/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c b/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c index 5505f6da2e..fb3559dd29 100644 --- a/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c +++ b/PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcRtc.c @@ -189,6 +189,67 @@ RtcWrite ( }
/**
+ Sets the current local timezone & daylight information.
+
+ @param TimeZone Timezone info.
+ @param Daylight Daylight info.
+ @param Global For global use inside this module.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval EFI_DEVICE_ERROR The variable could not be set due due to hardware error.
+
+**/
+EFI_STATUS
+PcRtcSetTimeZone (
+ IN INT16 TimeZone,
+ IN UINT8 Daylight,
+ IN PC_RTC_MODULE_GLOBALS *Global
+ )
+{
+ EFI_STATUS Status;
+ UINT32 TimerVar;
+
+ ASSERT ((TimeZone == EFI_UNSPECIFIED_TIMEZONE) || ((TimeZone >= -1440) && (TimeZone <= 1440)));
+ ASSERT ((Daylight & (~(EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT))) == 0);
+
+ //
+ // Write timezone and daylight to RTC variable
+ //
+ if ((TimeZone == EFI_UNSPECIFIED_TIMEZONE) && (Daylight == 0)) {
+ Status = EfiSetVariable (
+ mTimeZoneVariableName,
+ &gEfiCallerIdGuid,
+ 0,
+ 0,
+ NULL
+ );
+ if (Status == EFI_NOT_FOUND) {
+ Status = EFI_SUCCESS;
+ }
+ } else {
+ TimerVar = Daylight;
+ TimerVar = (UINT32)((TimerVar << 16) | (UINT16)(TimeZone));
+ Status = EfiSetVariable (
+ mTimeZoneVariableName,
+ &gEfiCallerIdGuid,
+ EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
+ sizeof (TimerVar),
+ &TimerVar
+ );
+ }
+
+ //
+ // Set the variable that contains the TimeZone and Daylight fields
+ //
+ if (!EFI_ERROR (Status)) {
+ Global->SavedTimeZone = TimeZone;
+ Global->Daylight = Daylight;
+ }
+
+ return Status;
+}
+
+/**
Initialize RTC.
@param Global For global use inside this module.
@@ -211,6 +272,9 @@ PcRtcInit ( UINT32 TimerVar;
BOOLEAN Enabled;
BOOLEAN Pending;
+ BOOLEAN NeedRtcUpdate;
+
+ NeedRtcUpdate = FALSE;
//
// Acquire RTC Lock to make access to RTC atomic
@@ -324,21 +388,32 @@ PcRtcInit ( Time.Nanosecond = 0;
Time.TimeZone = EFI_UNSPECIFIED_TIMEZONE;
Time.Daylight = 0;
+ NeedRtcUpdate = TRUE;
}
//
// Set RTC configuration after get original time
// The value of bit AIE should be reserved.
//
- RegisterB.Data = FixedPcdGet8 (PcdInitialValueRtcRegisterB) | (RegisterB.Data & BIT5);
- RtcWrite (RTC_ADDRESS_REGISTER_B, RegisterB.Data);
+ if ((RegisterB.Data | BIT5) != (FixedPcdGet8 (PcdInitialValueRtcRegisterB) | BIT5)) {
+ RegisterB.Data = FixedPcdGet8 (PcdInitialValueRtcRegisterB) | (RegisterB.Data & BIT5);
+ RtcWrite (RTC_ADDRESS_REGISTER_B, RegisterB.Data);
+ NeedRtcUpdate = TRUE;
+ }
//
// Reset time value according to new RTC configuration
//
- Status = PcRtcSetTime (&Time, Global);
- if (EFI_ERROR (Status)) {
- return EFI_DEVICE_ERROR;
+ if (NeedRtcUpdate) {
+ Status = PcRtcSetTime (&Time, Global);
+ if (EFI_ERROR (Status)) {
+ return EFI_DEVICE_ERROR;
+ }
+ } else {
+ Status = PcRtcSetTimeZone (Time.TimeZone, Time.Daylight, Global);
+ if (EFI_ERROR (Status)) {
+ return EFI_DEVICE_ERROR;
+ }
}
//
@@ -563,7 +638,6 @@ PcRtcSetTime ( EFI_TIME RtcTime;
RTC_REGISTER_A RegisterA;
RTC_REGISTER_B RegisterB;
- UINT32 TimerVar;
if (Time == NULL) {
return EFI_INVALID_PARAMETER;
@@ -598,31 +672,7 @@ PcRtcSetTime ( return Status;
}
- //
- // Write timezone and daylight to RTC variable
- //
- if ((Time->TimeZone == EFI_UNSPECIFIED_TIMEZONE) && (Time->Daylight == 0)) {
- Status = EfiSetVariable (
- mTimeZoneVariableName,
- &gEfiCallerIdGuid,
- 0,
- 0,
- NULL
- );
- if (Status == EFI_NOT_FOUND) {
- Status = EFI_SUCCESS;
- }
- } else {
- TimerVar = Time->Daylight;
- TimerVar = (UINT32)((TimerVar << 16) | (UINT16)(Time->TimeZone));
- Status = EfiSetVariable (
- mTimeZoneVariableName,
- &gEfiCallerIdGuid,
- EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
- sizeof (TimerVar),
- &TimerVar
- );
- }
+ Status = PcRtcSetTimeZone (Time->TimeZone, Time->Daylight, Global);
if (EFI_ERROR (Status)) {
if (!EfiAtRuntime ()) {
@@ -677,12 +727,6 @@ PcRtcSetTime ( EfiReleaseLock (&Global->RtcLock);
}
- //
- // Set the variable that contains the TimeZone and Daylight fields
- //
- Global->SavedTimeZone = Time->TimeZone;
- Global->Daylight = Time->Daylight;
-
return EFI_SUCCESS;
}
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