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path: root/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c
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Diffstat (limited to 'ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c')
-rw-r--r--ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c120
1 files changed, 62 insertions, 58 deletions
diff --git a/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c b/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c
index 9bccd2f14f..03361cd73a 100644
--- a/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c
+++ b/ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.c
@@ -15,7 +15,6 @@
**/
-#include <Base.h>
#include <Uefi.h>
#include <PiDxe.h>
#include <Library/BaseLib.h>
@@ -24,14 +23,16 @@
#include <Library/IoLib.h>
#include <Library/RealTimeClockLib.h>
#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
#include <Library/ArmPlatformSysConfigLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Protocol/RealTimeClock.h>
#include <Guid/GlobalVariable.h>
-#include <ArmPlatform.h>
#include <Drivers/PL031RealTimeClock.h>
+#include <ArmPlatform.h>
+
CHAR16 mTimeZoneVariableName[] = L"PL031_TimeZone";
CHAR16 mDaylightVariableName[] = L"PL031_Daylight";
BOOLEAN mPL031Initialized = FALSE;
@@ -44,19 +45,19 @@ IdentifyPL031 (
EFI_STATUS Status;
// Check if this is a PrimeCell Peripheral
- if( ( MmioRead8( PL031_RTC_PCELL_ID0 ) != 0x0D )
- || ( MmioRead8( PL031_RTC_PCELL_ID1 ) != 0xF0 )
- || ( MmioRead8( PL031_RTC_PCELL_ID2 ) != 0x05 )
- || ( MmioRead8( PL031_RTC_PCELL_ID3 ) != 0xB1 ) ) {
+ if ( (MmioRead8 (PL031_RTC_PCELL_ID0) != 0x0D)
+ || (MmioRead8 (PL031_RTC_PCELL_ID1) != 0xF0)
+ || (MmioRead8 (PL031_RTC_PCELL_ID2) != 0x05)
+ || (MmioRead8 (PL031_RTC_PCELL_ID3) != 0xB1)) {
Status = EFI_NOT_FOUND;
goto EXIT;
}
// Check if this PrimeCell Peripheral is the SP805 Watchdog Timer
- if( ( MmioRead8( PL031_RTC_PERIPH_ID0 ) != 0x31 )
- || ( MmioRead8( PL031_RTC_PERIPH_ID1 ) != 0x10 )
- || (( MmioRead8( PL031_RTC_PERIPH_ID2 ) & 0xF) != 0x04 )
- || ( MmioRead8( PL031_RTC_PERIPH_ID3 ) != 0x00 ) ) {
+ if ( (MmioRead8 (PL031_RTC_PERIPH_ID0) != 0x31)
+ || (MmioRead8 (PL031_RTC_PERIPH_ID1) != 0x10)
+ || ((MmioRead8 (PL031_RTC_PERIPH_ID2) & 0xF) != 0x04)
+ || (MmioRead8 (PL031_RTC_PERIPH_ID3) != 0x00)) {
Status = EFI_NOT_FOUND;
goto EXIT;
}
@@ -81,18 +82,18 @@ InitializePL031 (
}
// Ensure interrupts are masked. We do not want RTC interrupts in UEFI
- if ( (MmioRead32( PL031_RTC_IMSC_IRQ_MASK_SET_CLEAR_REGISTER ) & PL031_SET_IRQ_MASK) != PL031_SET_IRQ_MASK ) {
- MmioOr32( PL031_RTC_IMSC_IRQ_MASK_SET_CLEAR_REGISTER, PL031_SET_IRQ_MASK);
+ if ((MmioRead32 (PL031_RTC_IMSC_IRQ_MASK_SET_CLEAR_REGISTER) & PL031_SET_IRQ_MASK) != PL031_SET_IRQ_MASK) {
+ MmioOr32 (PL031_RTC_IMSC_IRQ_MASK_SET_CLEAR_REGISTER, PL031_SET_IRQ_MASK);
}
// Clear any existing interrupts
- if ( (MmioRead32( PL031_RTC_RIS_RAW_IRQ_STATUS_REGISTER ) & PL031_IRQ_TRIGGERED) == PL031_IRQ_TRIGGERED ) {
- MmioOr32( PL031_RTC_ICR_IRQ_CLEAR_REGISTER, PL031_CLEAR_IRQ);
+ if ((MmioRead32 (PL031_RTC_RIS_RAW_IRQ_STATUS_REGISTER) & PL031_IRQ_TRIGGERED) == PL031_IRQ_TRIGGERED) {
+ MmioOr32 (PL031_RTC_ICR_IRQ_CLEAR_REGISTER, PL031_CLEAR_IRQ);
}
// Start the clock counter
- if ( (MmioRead32( PL031_RTC_CR_CONTROL_REGISTER ) & PL031_RTC_ENABLED) != PL031_RTC_ENABLED ) {
- MmioOr32( PL031_RTC_CR_CONTROL_REGISTER, PL031_RTC_ENABLED);
+ if ((MmioRead32 (PL031_RTC_CR_CONTROL_REGISTER) & PL031_RTC_ENABLED) != PL031_RTC_ENABLED) {
+ MmioOr32 (PL031_RTC_CR_CONTROL_REGISTER, PL031_RTC_ENABLED);
}
mPL031Initialized = TRUE;
@@ -127,7 +128,7 @@ EpochToEfiTime (
UINTN ss;
UINTN J;
- if( Time->Daylight == TRUE) {
+ if (Time->Daylight == TRUE) {
}
@@ -183,7 +184,7 @@ EfiTimeToEpoch (
JulianDate = Time->Day + ((153*m + 2)/5) + (365*y) + (y/4) - (y/100) + (y/400) - 32045;
- ASSERT( JulianDate > EPOCH_JULIAN_DATE );
+ ASSERT(JulianDate > EPOCH_JULIAN_DATE);
EpochDays = JulianDate - EPOCH_JULIAN_DATE;
EpochSeconds = (EpochDays * SEC_PER_DAY) + ((UINTN)Time->Hour * SEC_PER_HOUR) + (Time->Minute * SEC_PER_MIN) + Time->Second;
@@ -221,7 +222,7 @@ DayValid (
if (Time->Day < 1 ||
Time->Day > DayOfMonth[Time->Month - 1] ||
(Time->Month == 2 && (!IsLeapYear (Time) && Time->Day > 28))
- ) {
+ ) {
return FALSE;
}
@@ -254,8 +255,8 @@ LibGetTime (
UINTN *Daylight = 0;
// Initialize the hardware if not already done
- if( !mPL031Initialized ) {
- Status = InitializePL031();
+ if (!mPL031Initialized) {
+ Status = InitializePL031 ();
if (EFI_ERROR (Status)) {
goto EXIT;
}
@@ -267,7 +268,7 @@ LibGetTime (
Status = ArmPlatformSysConfigGet (SYS_CFG_RTC, &EpochSeconds);
if (Status == EFI_UNSUPPORTED) {
// Battery backed up hardware RTC does not exist, revert to PL031
- EpochSeconds = MmioRead32( PL031_RTC_DR_DATA_REGISTER );
+ EpochSeconds = MmioRead32 (PL031_RTC_DR_DATA_REGISTER);
Status = EFI_SUCCESS;
} else if (EFI_ERROR (Status)) {
// Battery backed up hardware RTC exists but could not be read due to error. Abort.
@@ -275,11 +276,11 @@ LibGetTime (
} else {
// Battery backed up hardware RTC exists and we read the time correctly from it.
// Now sync the PL031 to the new time.
- MmioWrite32( PL031_RTC_LR_LOAD_REGISTER, EpochSeconds);
+ MmioWrite32 (PL031_RTC_LR_LOAD_REGISTER, EpochSeconds);
}
// Ensure Time is a valid pointer
- if( Time == NULL ) {
+ if (Time == NULL) {
Status = EFI_INVALID_PARAMETER;
goto EXIT;
}
@@ -287,7 +288,7 @@ LibGetTime (
// Get the current time zone information from non-volatile storage
TimeZone = (INT16 *)GetVariable(mTimeZoneVariableName, &gEfiGlobalVariableGuid);
- if( TimeZone == NULL ) {
+ if (TimeZone == NULL) {
// The time zone variable does not exist in non-volatile storage, so create it.
Time->TimeZone = EFI_UNSPECIFIED_TIMEZONE;
// Store it
@@ -297,7 +298,7 @@ LibGetTime (
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(Time->TimeZone),
&(Time->TimeZone)
- );
+ );
if (EFI_ERROR (Status)) {
DEBUG((EFI_D_ERROR,"LibGetTime: ERROR: TimeZone\n"));
goto EXIT;
@@ -308,13 +309,13 @@ LibGetTime (
FreePool(TimeZone);
// Check TimeZone bounds: -1440 to 1440 or 2047
- if( (( Time->TimeZone < -1440 ) || ( Time->TimeZone > 1440 ))
- && ( Time->TimeZone != EFI_UNSPECIFIED_TIMEZONE) ) {
+ if (((Time->TimeZone < -1440) || (Time->TimeZone > 1440))
+ && (Time->TimeZone != EFI_UNSPECIFIED_TIMEZONE)) {
Time->TimeZone = EFI_UNSPECIFIED_TIMEZONE;
}
// Adjust for the correct time zone
- if( Time->TimeZone != EFI_UNSPECIFIED_TIMEZONE ) {
+ if (Time->TimeZone != EFI_UNSPECIFIED_TIMEZONE) {
EpochSeconds += Time->TimeZone * SEC_PER_MIN;
}
}
@@ -322,7 +323,7 @@ LibGetTime (
// Get the current daylight information from non-volatile storage
Daylight = (UINTN *)GetVariable(mDaylightVariableName, &gEfiGlobalVariableGuid);
- if( Daylight == NULL ) {
+ if (Daylight == NULL) {
// The daylight variable does not exist in non-volatile storage, so create it.
Time->Daylight = 0;
// Store it
@@ -332,7 +333,7 @@ LibGetTime (
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(Time->Daylight),
&(Time->Daylight)
- );
+ );
if (EFI_ERROR (Status)) {
DEBUG((EFI_D_ERROR,"LibGetTime: ERROR: Daylight\n"));
goto EXIT;
@@ -343,20 +344,23 @@ LibGetTime (
FreePool(Daylight);
// Adjust for the correct period
- if( (Time->Daylight & EFI_TIME_IN_DAYLIGHT) == EFI_TIME_IN_DAYLIGHT ) {
+ if ((Time->Daylight & EFI_TIME_IN_DAYLIGHT) == EFI_TIME_IN_DAYLIGHT) {
// Convert to adjusted time, i.e. spring forwards one hour
EpochSeconds += SEC_PER_HOUR;
}
}
// Convert from internal 32-bit time to UEFI time
- EpochToEfiTime( EpochSeconds, Time );
+ EpochToEfiTime (EpochSeconds, Time);
// Update the Capabilities info
- if( Capabilities != NULL ) {
- Capabilities->Resolution = PL031_COUNTS_PER_SECOND; /* PL031 runs at frequency 1Hz */
- Capabilities->Accuracy = PL031_PPM_ACCURACY; /* Accuracy in ppm multiplied by 1,000,000, e.g. for 50ppm set 50,000,000 */
- Capabilities->SetsToZero = FALSE; /* FALSE: Setting the time does not clear the values below the resolution level */
+ if (Capabilities != NULL) {
+ // PL031 runs at frequency 1Hz
+ Capabilities->Resolution = PL031_COUNTS_PER_SECOND;
+ // Accuracy in ppm multiplied by 1,000,000, e.g. for 50ppm set 50,000,000
+ Capabilities->Accuracy = (UINT32)PcdGet32 (PcdPL031RtcPpmAccuracy);
+ // FALSE: Setting the time does not clear the values below the resolution level
+ Capabilities->SetsToZero = FALSE;
}
EXIT:
@@ -391,41 +395,41 @@ LibSetTime (
// to the range 1998 .. 2011
// Check the input parameters' range.
- if ( ( Time->Year < 1998 ) ||
- ( Time->Year > 2099 ) ||
- ( Time->Month < 1 ) ||
- ( Time->Month > 12 ) ||
- (!DayValid (Time) ) ||
- ( Time->Hour > 23 ) ||
- ( Time->Minute > 59 ) ||
- ( Time->Second > 59 ) ||
- ( Time->Nanosecond > 999999999 ) ||
- ( !((Time->TimeZone == EFI_UNSPECIFIED_TIMEZONE) || ((Time->TimeZone >= -1440) && (Time->TimeZone <= 1440))) ) ||
- ( Time->Daylight & (~(EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT)) )
- ) {
+ if ((Time->Year < 1998) ||
+ (Time->Year > 2099) ||
+ (Time->Month < 1 ) ||
+ (Time->Month > 12 ) ||
+ (!DayValid (Time) ) ||
+ (Time->Hour > 23 ) ||
+ (Time->Minute > 59 ) ||
+ (Time->Second > 59 ) ||
+ (Time->Nanosecond > 999999999) ||
+ (!((Time->TimeZone == EFI_UNSPECIFIED_TIMEZONE) || ((Time->TimeZone >= -1440) && (Time->TimeZone <= 1440)))) ||
+ (Time->Daylight & (~(EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT)))
+ ) {
Status = EFI_INVALID_PARAMETER;
goto EXIT;
}
// Initialize the hardware if not already done
- if( !mPL031Initialized ) {
- Status = InitializePL031();
+ if (!mPL031Initialized) {
+ Status = InitializePL031 ();
if (EFI_ERROR (Status)) {
goto EXIT;
}
}
- EpochSeconds = EfiTimeToEpoch( Time );
+ EpochSeconds = EfiTimeToEpoch (Time);
// Adjust for the correct time zone, i.e. convert to UTC time zone
- if( Time->TimeZone != EFI_UNSPECIFIED_TIMEZONE ) {
+ if (Time->TimeZone != EFI_UNSPECIFIED_TIMEZONE) {
EpochSeconds -= Time->TimeZone * SEC_PER_MIN;
}
// TODO: Automatic Daylight activation
// Adjust for the correct period
- if( (Time->Daylight & EFI_TIME_IN_DAYLIGHT) == EFI_TIME_IN_DAYLIGHT ) {
+ if ((Time->Daylight & EFI_TIME_IN_DAYLIGHT) == EFI_TIME_IN_DAYLIGHT) {
// Convert to un-adjusted time, i.e. fall back one hour
EpochSeconds -= SEC_PER_HOUR;
}
@@ -445,7 +449,7 @@ LibSetTime (
// Set the PL031
- MmioWrite32( PL031_RTC_LR_LOAD_REGISTER, EpochSeconds);
+ MmioWrite32 (PL031_RTC_LR_LOAD_REGISTER, EpochSeconds);
// The accesses to Variable Services can be very slow, because we may be writing to Flash.
// Do this after having set the RTC.
@@ -457,7 +461,7 @@ LibSetTime (
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(Time->TimeZone),
&(Time->TimeZone)
- );
+ );
if (EFI_ERROR (Status)) {
DEBUG((EFI_D_ERROR,"LibSetTime: ERROR: TimeZone\n"));
goto EXIT;
@@ -470,7 +474,7 @@ LibSetTime (
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(Time->Daylight),
&(Time->Daylight)
- );
+ );
if (EFI_ERROR (Status)) {
DEBUG((EFI_D_ERROR,"LibSetTime: ERROR: Daylight\n"));
goto EXIT;
@@ -564,7 +568,7 @@ LibRtcInitialize (
&Handle,
&gEfiRealTimeClockArchProtocolGuid, NULL,
NULL
- );
+ );
return Status;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-29 11:58:33 +0000