diff options
Diffstat (limited to 'EmbeddedPkg/Library/HalRuntimeServicesExampleLib/Rtc.c')
| -rw-r--r-- | EmbeddedPkg/Library/HalRuntimeServicesExampleLib/Rtc.c | 862 |
1 files changed, 0 insertions, 862 deletions
diff --git a/EmbeddedPkg/Library/HalRuntimeServicesExampleLib/Rtc.c b/EmbeddedPkg/Library/HalRuntimeServicesExampleLib/Rtc.c deleted file mode 100644 index c35d72c03c..0000000000 --- a/EmbeddedPkg/Library/HalRuntimeServicesExampleLib/Rtc.c +++ /dev/null @@ -1,862 +0,0 @@ -/** @file
- Simple PC RTC
-
- Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>
- Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
- Copyright (c) 2014, ARM Ltd. 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.
-
-
-**/
-
-
-
-typedef struct {
- EFI_LOCK RtcLock;
- UINT16 SavedTimeZone;
- UINT8 Daylight;
-} PC_RTC_GLOBALS;
-
-#define PCAT_RTC_ADDRESS_REGISTER 0x70
-#define PCAT_RTC_DATA_REGISTER 0x71
-
-//
-// Dallas DS12C887 Real Time Clock
-//
-#define RTC_ADDRESS_SECONDS 0 // R/W Range 0..59
-#define RTC_ADDRESS_SECONDS_ALARM 1 // R/W Range 0..59
-#define RTC_ADDRESS_MINUTES 2 // R/W Range 0..59
-#define RTC_ADDRESS_MINUTES_ALARM 3 // R/W Range 0..59
-#define RTC_ADDRESS_HOURS 4 // R/W Range 1..12 or 0..23 Bit 7 is AM/PM
-#define RTC_ADDRESS_HOURS_ALARM 5 // R/W Range 1..12 or 0..23 Bit 7 is AM/PM
-#define RTC_ADDRESS_DAY_OF_THE_WEEK 6 // R/W Range 1..7
-#define RTC_ADDRESS_DAY_OF_THE_MONTH 7 // R/W Range 1..31
-#define RTC_ADDRESS_MONTH 8 // R/W Range 1..12
-#define RTC_ADDRESS_YEAR 9 // R/W Range 0..99
-#define RTC_ADDRESS_REGISTER_A 10 // R/W[0..6] R0[7]
-#define RTC_ADDRESS_REGISTER_B 11 // R/W
-#define RTC_ADDRESS_REGISTER_C 12 // RO
-#define RTC_ADDRESS_REGISTER_D 13 // RO
-#define RTC_ADDRESS_CENTURY 50 // R/W Range 19..20 Bit 8 is R/W
-//
-// Date and time initial values.
-// They are used if the RTC values are invalid during driver initialization
-//
-#define RTC_INIT_SECOND 0
-#define RTC_INIT_MINUTE 0
-#define RTC_INIT_HOUR 0
-#define RTC_INIT_DAY 1
-#define RTC_INIT_MONTH 1
-#define RTC_INIT_YEAR 2001
-
-//
-// Register initial values
-//
-#define RTC_INIT_REGISTER_A 0x26
-#define RTC_INIT_REGISTER_B 0x02
-#define RTC_INIT_REGISTER_D 0x0
-
-#pragma pack(1)
-//
-// Register A
-//
-typedef struct {
- UINT8 RS : 4; // Rate Selection Bits
- UINT8 DV : 3; // Divisor
- UINT8 UIP : 1; // Update in progress
-} RTC_REGISTER_A_BITS;
-
-typedef union {
- RTC_REGISTER_A_BITS Bits;
- UINT8 Data;
-} RTC_REGISTER_A;
-
-//
-// Register B
-//
-typedef struct {
- UINT8 DSE : 1; // 0 - Daylight saving disabled 1 - Daylight savings enabled
- UINT8 MIL : 1; // 0 - 12 hour mode 1 - 24 hour mode
- UINT8 DM : 1; // 0 - BCD Format 1 - Binary Format
- UINT8 SQWE : 1; // 0 - Disable SQWE output 1 - Enable SQWE output
- UINT8 UIE : 1; // 0 - Update INT disabled 1 - Update INT enabled
- UINT8 AIE : 1; // 0 - Alarm INT disabled 1 - Alarm INT Enabled
- UINT8 PIE : 1; // 0 - Periodic INT disabled 1 - Periodic INT Enabled
- UINT8 SET : 1; // 0 - Normal operation. 1 - Updates inhibited
-} RTC_REGISTER_B_BITS;
-
-typedef union {
- RTC_REGISTER_B_BITS Bits;
- UINT8 Data;
-} RTC_REGISTER_B;
-
-//
-// Register C
-//
-typedef struct {
- UINT8 Reserved : 4; // Read as zero. Can not be written.
- UINT8 UF : 1; // Update End Interrupt Flag
- UINT8 AF : 1; // Alarm Interrupt Flag
- UINT8 PF : 1; // Periodic Interrupt Flag
- UINT8 IRQF : 1; // Iterrupt Request Flag = PF & PIE | AF & AIE | UF & UIE
-} RTC_REGISTER_C_BITS;
-
-typedef union {
- RTC_REGISTER_C_BITS Bits;
- UINT8 Data;
-} RTC_REGISTER_C;
-
-//
-// Register D
-//
-typedef struct {
- UINT8 Reserved : 7; // Read as zero. Can not be written.
- UINT8 VRT : 1; // Valid RAM and Time
-} RTC_REGISTER_D_BITS;
-
-typedef union {
- RTC_REGISTER_D_BITS Bits;
- UINT8 Data;
-} RTC_REGISTER_D;
-
-#pragma pack()
-
-PC_RTC_GLOBALS mRtc;
-
-BOOLEAN
-IsLeapYear (
- IN EFI_TIME *Time
- )
-{
- if (Time->Year % 4 == 0) {
- if (Time->Year % 100 == 0) {
- if (Time->Year % 400 == 0) {
- return TRUE;
- } else {
- return FALSE;
- }
- } else {
- return TRUE;
- }
- } else {
- return FALSE;
- }
-}
-
-
-const INTN mDayOfMonth[12] = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
-
-BOOLEAN
-DayValid (
- IN EFI_TIME *Time
- )
-{
- if (Time->Day < 1 ||
- Time->Day > mDayOfMonth[Time->Month - 1] ||
- (Time->Month == 2 && (!IsLeapYear (Time) && Time->Day > 28))
- ) {
- return FALSE;
- }
-
- return TRUE;
-}
-
-
-UINT8
-DecimaltoBcd (
- IN UINT8 DecValue
- )
-{
- UINTN High;
- UINTN Low;
-
- High = DecValue / 10;
- Low = DecValue - (High * 10);
-
- return (UINT8) (Low + (High << 4));
-}
-
-UINT8
-BcdToDecimal (
- IN UINT8 BcdValue
- )
-{
- UINTN High;
- UINTN Low;
-
- High = BcdValue >> 4;
- Low = BcdValue - (High << 4);
-
- return (UINT8) (Low + (High * 10));
-}
-
-
-
-
-VOID
-ConvertEfiTimeToRtcTime (
- IN EFI_TIME *Time,
- IN RTC_REGISTER_B RegisterB,
- IN UINT8 *Century
- )
-{
- BOOLEAN PM;
-
- PM = TRUE;
- //
- // Adjust hour field if RTC in in 12 hour mode
- //
- if (RegisterB.Bits.MIL == 0) {
- if (Time->Hour < 12) {
- PM = FALSE;
- }
-
- if (Time->Hour >= 13) {
- Time->Hour = (UINT8) (Time->Hour - 12);
- } else if (Time->Hour == 0) {
- Time->Hour = 12;
- }
- }
- //
- // Set the Time/Date/Daylight Savings values.
- //
- *Century = DecimaltoBcd ((UINT8) (Time->Year / 100));
-
- Time->Year = (UINT16) (Time->Year % 100);
-
- if (RegisterB.Bits.DM == 0) {
- Time->Year = DecimaltoBcd ((UINT8) Time->Year);
- Time->Month = DecimaltoBcd (Time->Month);
- Time->Day = DecimaltoBcd (Time->Day);
- Time->Hour = DecimaltoBcd (Time->Hour);
- Time->Minute = DecimaltoBcd (Time->Minute);
- Time->Second = DecimaltoBcd (Time->Second);
- }
- //
- // If we are in 12 hour mode and PM is set, then set bit 7 of the Hour field.
- //
- if (RegisterB.Bits.MIL == 0 && PM) {
- Time->Hour = (UINT8) (Time->Hour | 0x80);
- }
-}
-
-/**
- Check the validity of all the fields of a data structure of type EFI_TIME
-
- @param[in] Time Pointer to a data structure of type EFI_TIME that defines a date and time
-
- @retval EFI_SUCCESS All date and time fields are valid
- @retval EFI_INVALID_PARAMETER At least one date or time field is not valid
-**/
-EFI_STATUS
-RtcTimeFieldsValid (
- IN EFI_TIME *Time
- )
-{
- 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 )))
- ) {
- return EFI_INVALID_PARAMETER;
- }
-
- return EFI_SUCCESS;
-}
-
-UINT8
-RtcRead (
- IN UINT8 Address
- )
-{
- IoWrite8 (PCAT_RTC_ADDRESS_REGISTER, (UINT8) (Address | (UINT8) (IoRead8 (PCAT_RTC_ADDRESS_REGISTER) & 0x80)));
- return IoRead8 (PCAT_RTC_DATA_REGISTER);
-}
-
-VOID
-RtcWrite (
- IN UINT8 Address,
- IN UINT8 Data
- )
-{
- IoWrite8 (PCAT_RTC_ADDRESS_REGISTER, (UINT8) (Address | (UINT8) (IoRead8 (PCAT_RTC_ADDRESS_REGISTER) & 0x80)));
- IoWrite8 (PCAT_RTC_DATA_REGISTER, Data);
-}
-
-
-EFI_STATUS
-RtcTestCenturyRegister (
- VOID
- )
-{
- UINT8 Century;
- UINT8 Temp;
-
- Century = RtcRead (RTC_ADDRESS_CENTURY);
- //
- // RtcWrite (RTC_ADDRESS_CENTURY, 0x00);
- //
- Temp = (UINT8) (RtcRead (RTC_ADDRESS_CENTURY) & 0x7f);
- RtcWrite (RTC_ADDRESS_CENTURY, Century);
- if (Temp == 0x19 || Temp == 0x20) {
- return EFI_SUCCESS;
- }
-
- return EFI_DEVICE_ERROR;
-}
-
-VOID
-ConvertRtcTimeToEfiTime (
- IN EFI_TIME *Time,
- IN RTC_REGISTER_B RegisterB
- )
-{
- BOOLEAN PM;
-
- if ((Time->Hour) & 0x80) {
- PM = TRUE;
- } else {
- PM = FALSE;
- }
-
- Time->Hour = (UINT8) (Time->Hour & 0x7f);
-
- if (RegisterB.Bits.DM == 0) {
- Time->Year = BcdToDecimal ((UINT8) Time->Year);
- Time->Month = BcdToDecimal (Time->Month);
- Time->Day = BcdToDecimal (Time->Day);
- Time->Hour = BcdToDecimal (Time->Hour);
- Time->Minute = BcdToDecimal (Time->Minute);
- Time->Second = BcdToDecimal (Time->Second);
- }
- //
- // If time is in 12 hour format, convert it to 24 hour format
- //
- if (RegisterB.Bits.MIL == 0) {
- if (PM && Time->Hour < 12) {
- Time->Hour = (UINT8) (Time->Hour + 12);
- }
-
- if (!PM && Time->Hour == 12) {
- Time->Hour = 0;
- }
- }
-
- Time->Nanosecond = 0;
- Time->TimeZone = EFI_UNSPECIFIED_TIMEZONE;
- Time->Daylight = 0;
-}
-
-EFI_STATUS
-RtcWaitToUpdate (
- UINTN Timeout
- )
-{
- RTC_REGISTER_A RegisterA;
- RTC_REGISTER_D RegisterD;
-
- //
- // See if the RTC is functioning correctly
- //
- RegisterD.Data = RtcRead (RTC_ADDRESS_REGISTER_D);
-
- if (RegisterD.Bits.VRT == 0) {
- return EFI_DEVICE_ERROR;
- }
- //
- // Wait for up to 0.1 seconds for the RTC to be ready.
- //
- Timeout = (Timeout / 10) + 1;
- RegisterA.Data = RtcRead (RTC_ADDRESS_REGISTER_A);
- while (RegisterA.Bits.UIP == 1 && Timeout > 0) {
- MicroSecondDelay (10);
- RegisterA.Data = RtcRead (RTC_ADDRESS_REGISTER_A);
- Timeout--;
- }
-
- RegisterD.Data = RtcRead (RTC_ADDRESS_REGISTER_D);
- if (Timeout == 0 || RegisterD.Bits.VRT == 0) {
- return EFI_DEVICE_ERROR;
- }
-
- return EFI_SUCCESS;
-}
-
-EFI_STATUS
-LibGetTime (
- OUT EFI_TIME *Time,
- OUT EFI_TIME_CAPABILITIES *Capabilities
- )
-{
- EFI_STATUS Status;
- RTC_REGISTER_B RegisterB;
- UINT8 Century;
- UINTN BufferSize;
-
- //
- // Check parameters for null pointer
- //
- if (Time == NULL) {
- return EFI_INVALID_PARAMETER;
-
- }
- //
- // Acquire RTC Lock to make access to RTC atomic
- //
- EfiAcquireLock (&mRtc.RtcLock);
-
- //
- // Wait for up to 0.1 seconds for the RTC to be updated
- //
- Status = RtcWaitToUpdate (100000);
- if (EFI_ERROR (Status)) {
- EfiReleaseLock (&mRtc.RtcLock);
- return Status;
- }
- //
- // Read Register B
- //
- RegisterB.Data = RtcRead (RTC_ADDRESS_REGISTER_B);
-
- //
- // Get the Time/Date/Daylight Savings values.
- //
- Time->Second = RtcRead (RTC_ADDRESS_SECONDS);
- Time->Minute = RtcRead (RTC_ADDRESS_MINUTES);
- Time->Hour = RtcRead (RTC_ADDRESS_HOURS);
- Time->Day = RtcRead (RTC_ADDRESS_DAY_OF_THE_MONTH);
- Time->Month = RtcRead (RTC_ADDRESS_MONTH);
- Time->Year = RtcRead (RTC_ADDRESS_YEAR);
-
- ConvertRtcTimeToEfiTime (Time, RegisterB);
-
- if (RtcTestCenturyRegister () == EFI_SUCCESS) {
- Century = BcdToDecimal ((UINT8) (RtcRead (RTC_ADDRESS_CENTURY) & 0x7f));
- } else {
- Century = BcdToDecimal (RtcRead (RTC_ADDRESS_CENTURY));
- }
-
- Time->Year = (UINT16) (Century * 100 + Time->Year);
-
- //
- // Release RTC Lock.
- //
- EfiReleaseLock (&mRtc.RtcLock);
-
- //
- // Get the variable that containts the TimeZone and Daylight fields
- //
- Time->TimeZone = mRtc.SavedTimeZone;
- Time->Daylight = mRtc.Daylight;
-
- BufferSize = sizeof (INT16) + sizeof (UINT8);
-
- //
- // Make sure all field values are in correct range
- //
- Status = RtcTimeFieldsValid (Time);
- if (EFI_ERROR (Status)) {
- return EFI_DEVICE_ERROR;
- }
- //
- // Fill in Capabilities if it was passed in
- //
- if (Capabilities) {
- Capabilities->Resolution = 1;
- //
- // 1 hertz
- //
- Capabilities->Accuracy = 50000000;
- //
- // 50 ppm
- //
- Capabilities->SetsToZero = FALSE;
- }
-
- return EFI_SUCCESS;
-}
-
-
-
-EFI_STATUS
-LibSetTime (
- IN EFI_TIME *Time
- )
-{
- EFI_STATUS Status;
- EFI_TIME RtcTime;
- RTC_REGISTER_B RegisterB;
- UINT8 Century;
-
- if (Time == NULL) {
- return EFI_INVALID_PARAMETER;
- }
- //
- // Make sure that the time fields are valid
- //
- Status = RtcTimeFieldsValid (Time);
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- CopyMem (&RtcTime, Time, sizeof (EFI_TIME));
-
- //
- // Acquire RTC Lock to make access to RTC atomic
- //
- EfiAcquireLock (&mRtc.RtcLock);
-
- //
- // Wait for up to 0.1 seconds for the RTC to be updated
- //
- Status = RtcWaitToUpdate (100000);
- if (EFI_ERROR (Status)) {
- EfiReleaseLock (&mRtc.RtcLock);
- return Status;
- }
- //
- // Read Register B, and inhibit updates of the RTC
- //
- RegisterB.Data = RtcRead (RTC_ADDRESS_REGISTER_B);
- RegisterB.Bits.SET = 1;
- RtcWrite (RTC_ADDRESS_REGISTER_B, RegisterB.Data);
-
- ConvertEfiTimeToRtcTime (&RtcTime, RegisterB, &Century);
-
- RtcWrite (RTC_ADDRESS_SECONDS, RtcTime.Second);
- RtcWrite (RTC_ADDRESS_MINUTES, RtcTime.Minute);
- RtcWrite (RTC_ADDRESS_HOURS, RtcTime.Hour);
- RtcWrite (RTC_ADDRESS_DAY_OF_THE_MONTH, RtcTime.Day);
- RtcWrite (RTC_ADDRESS_MONTH, RtcTime.Month);
- RtcWrite (RTC_ADDRESS_YEAR, (UINT8) RtcTime.Year);
- if (RtcTestCenturyRegister () == EFI_SUCCESS) {
- Century = (UINT8) ((Century & 0x7f) | (RtcRead (RTC_ADDRESS_CENTURY) & 0x80));
- }
-
- RtcWrite (RTC_ADDRESS_CENTURY, Century);
-
- //
- // Allow updates of the RTC registers
- //
- RegisterB.Bits.SET = 0;
- RtcWrite (RTC_ADDRESS_REGISTER_B, RegisterB.Data);
-
- //
- // Release RTC Lock.
- //
- EfiReleaseLock (&mRtc.RtcLock);
-
- //
- // Set the variable that containts the TimeZone and Daylight fields
- //
- mRtc.SavedTimeZone = Time->TimeZone;
- mRtc.Daylight = Time->Daylight;
- return Status;
-}
-
-EFI_STATUS
-libGetWakeupTime (
- OUT BOOLEAN *Enabled,
- OUT BOOLEAN *Pending,
- OUT EFI_TIME *Time
- )
-{
- EFI_STATUS Status;
- RTC_REGISTER_B RegisterB;
- RTC_REGISTER_C RegisterC;
- UINT8 Century;
-
- //
- // Check paramters for null pointers
- //
- if ((Enabled == NULL) || (Pending == NULL) || (Time == NULL)) {
- return EFI_INVALID_PARAMETER;
-
- }
- //
- // Acquire RTC Lock to make access to RTC atomic
- //
- EfiAcquireLock (&mRtc.RtcLock);
-
- //
- // Wait for up to 0.1 seconds for the RTC to be updated
- //
- Status = RtcWaitToUpdate (100000);
- if (EFI_ERROR (Status)) {
- EfiReleaseLock (&mRtc.RtcLock);
- return EFI_DEVICE_ERROR;
- }
- //
- // Read Register B and Register C
- //
- RegisterB.Data = RtcRead (RTC_ADDRESS_REGISTER_B);
- RegisterC.Data = RtcRead (RTC_ADDRESS_REGISTER_C);
-
- //
- // Get the Time/Date/Daylight Savings values.
- //
- *Enabled = RegisterB.Bits.AIE;
- if (*Enabled) {
- Time->Second = RtcRead (RTC_ADDRESS_SECONDS_ALARM);
- Time->Minute = RtcRead (RTC_ADDRESS_MINUTES_ALARM);
- Time->Hour = RtcRead (RTC_ADDRESS_HOURS_ALARM);
- Time->Day = RtcRead (RTC_ADDRESS_DAY_OF_THE_MONTH);
- Time->Month = RtcRead (RTC_ADDRESS_MONTH);
- Time->Year = RtcRead (RTC_ADDRESS_YEAR);
- } else {
- Time->Second = 0;
- Time->Minute = 0;
- Time->Hour = 0;
- Time->Day = RtcRead (RTC_ADDRESS_DAY_OF_THE_MONTH);
- Time->Month = RtcRead (RTC_ADDRESS_MONTH);
- Time->Year = RtcRead (RTC_ADDRESS_YEAR);
- }
-
- ConvertRtcTimeToEfiTime (Time, RegisterB);
-
- if (RtcTestCenturyRegister () == EFI_SUCCESS) {
- Century = BcdToDecimal ((UINT8) (RtcRead (RTC_ADDRESS_CENTURY) & 0x7f));
- } else {
- Century = BcdToDecimal (RtcRead (RTC_ADDRESS_CENTURY));
- }
-
- Time->Year = (UINT16) (Century * 100 + Time->Year);
-
- //
- // Release RTC Lock.
- //
- EfiReleaseLock (&mRtc.RtcLock);
-
- //
- // Make sure all field values are in correct range
- //
- Status = RtcTimeFieldsValid (Time);
- if (EFI_ERROR (Status)) {
- return EFI_DEVICE_ERROR;
- }
-
- *Pending = RegisterC.Bits.AF;
-
- return EFI_SUCCESS;
-}
-
-EFI_STATUS
-LibSetWakeupTime (
- IN BOOLEAN Enabled,
- OUT EFI_TIME *Time
- )
-{
- EFI_STATUS Status;
- EFI_TIME RtcTime;
- RTC_REGISTER_B RegisterB;
- UINT8 Century;
- EFI_TIME_CAPABILITIES Capabilities;
-
- if (Enabled) {
-
- if (Time == NULL) {
- return EFI_INVALID_PARAMETER;
- }
- //
- // Make sure that the time fields are valid
- //
- Status = RtcTimeFieldsValid (Time);
- if (EFI_ERROR (Status)) {
- return EFI_INVALID_PARAMETER;
- }
- //
- // Just support set alarm time within 24 hours
- //
- LibGetTime (&RtcTime, &Capabilities);
- if (Time->Year != RtcTime.Year ||
- Time->Month != RtcTime.Month ||
- (Time->Day != RtcTime.Day && Time->Day != (RtcTime.Day + 1))
- ) {
- return EFI_UNSUPPORTED;
- }
- //
- // Make a local copy of the time and date
- //
- CopyMem (&RtcTime, Time, sizeof (EFI_TIME));
-
- }
- //
- // Acquire RTC Lock to make access to RTC atomic
- //
- EfiAcquireLock (&mRtc.RtcLock);
-
- //
- // Wait for up to 0.1 seconds for the RTC to be updated
- //
- Status = RtcWaitToUpdate (100000);
- if (EFI_ERROR (Status)) {
- EfiReleaseLock (&mRtc.RtcLock);
- return EFI_DEVICE_ERROR;
- }
- //
- // Read Register B, and inhibit updates of the RTC
- //
- RegisterB.Data = RtcRead (RTC_ADDRESS_REGISTER_B);
-
- RegisterB.Bits.SET = 1;
- RtcWrite (RTC_ADDRESS_REGISTER_B, RegisterB.Data);
-
- if (Enabled) {
- ConvertEfiTimeToRtcTime (&RtcTime, RegisterB, &Century);
-
- //
- // Set RTC alarm time
- //
- RtcWrite (RTC_ADDRESS_SECONDS_ALARM, RtcTime.Second);
- RtcWrite (RTC_ADDRESS_MINUTES_ALARM, RtcTime.Minute);
- RtcWrite (RTC_ADDRESS_HOURS_ALARM, RtcTime.Hour);
-
- RegisterB.Bits.AIE = 1;
-
- } else {
- RegisterB.Bits.AIE = 0;
- }
- //
- // Allow updates of the RTC registers
- //
- RegisterB.Bits.SET = 0;
- RtcWrite (RTC_ADDRESS_REGISTER_B, RegisterB.Data);
-
- //
- // Release RTC Lock.
- //
- EfiReleaseLock (&mRtc.RtcLock);
-
- return EFI_SUCCESS;
-}
-
-
-
-VOID
-LibRtcVirtualAddressChangeEvent (
- VOID
- )
-{
-}
-
-
-VOID
-LibRtcInitialize (
- VOID
- )
-{
- EFI_STATUS Status;
- RTC_REGISTER_A RegisterA;
- RTC_REGISTER_B RegisterB;
- RTC_REGISTER_C RegisterC;
- RTC_REGISTER_D RegisterD;
- UINT8 Century;
- EFI_TIME Time;
-
- //
- // Acquire RTC Lock to make access to RTC atomic
- //
- EfiAcquireLock (&mRtc.RtcLock);
-
- //
- // Initialize RTC Register
- //
- // Make sure Division Chain is properly configured,
- // or RTC clock won't "tick" -- time won't increment
- //
- RegisterA.Data = RTC_INIT_REGISTER_A;
- RtcWrite (RTC_ADDRESS_REGISTER_A, RegisterA.Data);
-
- //
- // Read Register B
- //
- RegisterB.Data = RtcRead (RTC_ADDRESS_REGISTER_B);
-
- //
- // Clear RTC flag register
- //
- RegisterC.Data = RtcRead (RTC_ADDRESS_REGISTER_C);
-
- //
- // Clear RTC register D
- //
- RegisterD.Data = RTC_INIT_REGISTER_D;
- RtcWrite (RTC_ADDRESS_REGISTER_D, RegisterD.Data);
-
- //
- // Wait for up to 0.1 seconds for the RTC to be updated
- //
- Status = RtcWaitToUpdate (100000);
- if (EFI_ERROR (Status)) {
- EfiReleaseLock (&mRtc.RtcLock);
- return;
- }
-
- //
- // Get the Time/Date/Daylight Savings values.
- //
- Time.Second = RtcRead (RTC_ADDRESS_SECONDS);
- Time.Minute = RtcRead (RTC_ADDRESS_MINUTES);
- Time.Hour = RtcRead (RTC_ADDRESS_HOURS);
- Time.Day = RtcRead (RTC_ADDRESS_DAY_OF_THE_MONTH);
- Time.Month = RtcRead (RTC_ADDRESS_MONTH);
- Time.Year = RtcRead (RTC_ADDRESS_YEAR);
-
- ConvertRtcTimeToEfiTime (&Time, RegisterB);
-
- if (RtcTestCenturyRegister () == EFI_SUCCESS) {
- Century = BcdToDecimal ((UINT8) (RtcRead (RTC_ADDRESS_CENTURY) & 0x7f));
- } else {
- Century = BcdToDecimal (RtcRead (RTC_ADDRESS_CENTURY));
- }
-
- Time.Year = (UINT16) (Century * 100 + Time.Year);
-
- //
- // Set RTC configuration after get original time
- //
- RtcWrite (RTC_ADDRESS_REGISTER_B, RTC_INIT_REGISTER_B);
-
- //
- // Release RTC Lock.
- //
- EfiReleaseLock (&mRtc.RtcLock);
-
- //
- // Validate time fields
- //
- Status = RtcTimeFieldsValid (&Time);
- if (EFI_ERROR (Status)) {
- Time.Second = RTC_INIT_SECOND;
- Time.Minute = RTC_INIT_MINUTE;
- Time.Hour = RTC_INIT_HOUR;
- Time.Day = RTC_INIT_DAY;
- Time.Month = RTC_INIT_MONTH;
- Time.Year = RTC_INIT_YEAR;
- }
- //
- // Reset time value according to new RTC configuration
- //
- LibSetTime (&Time);
-
- return;
-}
-
-
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