[mirror_edk2.git] / PcAtChipsetPkg / PcatRealTimeClockRuntimeDxe / PcRtc.h

/** @file\r
  Header file for real time clock driver.\r
\r
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
Copyright (c) 2017, AMD Inc. All rights reserved.<BR>\r
\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
\r
#ifndef _RTC_H_\r
#define _RTC_H_\r
\r
\r
#include <Uefi.h>\r
\r
#include <Guid/Acpi.h>\r
\r
#include <Protocol/RealTimeClock.h>\r
\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/UefiLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/IoLib.h>\r
#include <Library/TimerLib.h>\r
#include <Library/UefiDriverEntryPoint.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiRuntimeLib.h>\r
#include <Library/UefiRuntimeServicesTableLib.h>\r
#include <Library/PcdLib.h>\r
#include <Library/ReportStatusCodeLib.h>\r
\r
typedef struct {\r
  EFI_LOCK  RtcLock;\r
  INT16     SavedTimeZone;\r
  UINT8     Daylight;\r
  UINT8     CenturyRtcAddress;\r
} PC_RTC_MODULE_GLOBALS;\r
\r
extern PC_RTC_MODULE_GLOBALS  mModuleGlobal;\r
\r
//\r
// Dallas DS12C887 Real Time Clock\r
//\r
#define RTC_ADDRESS_SECONDS           0   // R/W  Range 0..59\r
#define RTC_ADDRESS_SECONDS_ALARM     1   // R/W  Range 0..59\r
#define RTC_ADDRESS_MINUTES           2   // R/W  Range 0..59\r
#define RTC_ADDRESS_MINUTES_ALARM     3   // R/W  Range 0..59\r
#define RTC_ADDRESS_HOURS             4   // R/W  Range 1..12 or 0..23 Bit 7 is AM/PM\r
#define RTC_ADDRESS_HOURS_ALARM       5   // R/W  Range 1..12 or 0..23 Bit 7 is AM/PM\r
#define RTC_ADDRESS_DAY_OF_THE_WEEK   6   // R/W  Range 1..7\r
#define RTC_ADDRESS_DAY_OF_THE_MONTH  7   // R/W  Range 1..31\r
#define RTC_ADDRESS_MONTH             8   // R/W  Range 1..12\r
#define RTC_ADDRESS_YEAR              9   // R/W  Range 0..99\r
#define RTC_ADDRESS_REGISTER_A        10  // R/W[0..6]  R0[7]\r
#define RTC_ADDRESS_REGISTER_B        11  // R/W\r
#define RTC_ADDRESS_REGISTER_C        12  // RO\r
#define RTC_ADDRESS_REGISTER_D        13  // RO\r
//\r
// Date and time initial values.\r
// They are used if the RTC values are invalid during driver initialization\r
//\r
#define RTC_INIT_SECOND 0\r
#define RTC_INIT_MINUTE 0\r
#define RTC_INIT_HOUR   0\r
#define RTC_INIT_DAY    1\r
#define RTC_INIT_MONTH  1\r
\r
#pragma pack(1)\r
//\r
// Register A\r
//\r
typedef struct {\r
  UINT8 Rs : 4;   // Rate Selection Bits\r
  UINT8 Dv : 3;   // Divisor\r
  UINT8 Uip : 1;  // Update in progress\r
} RTC_REGISTER_A_BITS;\r
\r
typedef union {\r
  RTC_REGISTER_A_BITS Bits;\r
  UINT8               Data;\r
} RTC_REGISTER_A;\r
\r
//\r
// Register B\r
//\r
typedef struct {\r
  UINT8 Dse : 1;  // 0 - Daylight saving disabled  1 - Daylight savings enabled\r
  UINT8 Mil : 1;  // 0 - 12 hour mode              1 - 24 hour mode\r
  UINT8 Dm : 1;   // 0 - BCD Format                1 - Binary Format\r
  UINT8 Sqwe : 1; // 0 - Disable SQWE output       1 - Enable SQWE output\r
  UINT8 Uie : 1;  // 0 - Update INT disabled       1 - Update INT enabled\r
  UINT8 Aie : 1;  // 0 - Alarm INT disabled        1 - Alarm INT Enabled\r
  UINT8 Pie : 1;  // 0 - Periodic INT disabled     1 - Periodic INT Enabled\r
  UINT8 Set : 1;  // 0 - Normal operation.         1 - Updates inhibited\r
} RTC_REGISTER_B_BITS;\r
\r
typedef union {\r
  RTC_REGISTER_B_BITS Bits;\r
  UINT8               Data;\r
} RTC_REGISTER_B;\r
\r
//\r
// Register C\r
//\r
typedef struct {\r
  UINT8 Reserved : 4; // Read as zero.  Can not be written.\r
  UINT8 Uf : 1;       // Update End Interrupt Flag\r
  UINT8 Af : 1;       // Alarm Interrupt Flag\r
  UINT8 Pf : 1;       // Periodic Interrupt Flag\r
  UINT8 Irqf : 1;     // Interrupt Request Flag = PF & PIE | AF & AIE | UF & UIE\r
} RTC_REGISTER_C_BITS;\r
\r
typedef union {\r
  RTC_REGISTER_C_BITS Bits;\r
  UINT8               Data;\r
} RTC_REGISTER_C;\r
\r
//\r
// Register D\r
//\r
typedef struct {\r
  UINT8 Reserved : 7; // Read as zero.  Can not be written.\r
  UINT8 Vrt : 1;      // Valid RAM and Time\r
} RTC_REGISTER_D_BITS;\r
\r
typedef union {\r
  RTC_REGISTER_D_BITS Bits;\r
  UINT8               Data;\r
} RTC_REGISTER_D;\r
\r
#pragma pack()\r
\r
/**\r
  Initialize RTC.\r
\r
  @param  Global            For global use inside this module.\r
\r
  @retval EFI_DEVICE_ERROR  Initialization failed due to device error.\r
  @retval EFI_SUCCESS       Initialization successful.\r
\r
**/\r
EFI_STATUS\r
PcRtcInit (\r
  IN PC_RTC_MODULE_GLOBALS  *Global\r
  );\r
\r
/**\r
  Sets the current local time and date information.\r
\r
  @param  Time                  A pointer to the current time.\r
  @param  Global                For global use inside this module.\r
\r
  @retval EFI_SUCCESS           The operation completed successfully.\r
  @retval EFI_INVALID_PARAMETER A time field is out of range.\r
  @retval EFI_DEVICE_ERROR      The time could not be set due due to hardware error.\r
\r
**/\r
EFI_STATUS\r
PcRtcSetTime (\r
  IN EFI_TIME               *Time,\r
  IN PC_RTC_MODULE_GLOBALS  *Global\r
  );\r
\r
/**\r
  Returns the current time and date information, and the time-keeping capabilities\r
  of the hardware platform.\r
\r
  @param  Time          A pointer to storage to receive a snapshot of the current time.\r
  @param  Capabilities  An optional pointer to a buffer to receive the real time clock\r
                        device's capabilities.\r
  @param  Global        For global use inside this module.\r
\r
  @retval EFI_SUCCESS            The operation completed successfully.\r
  @retval EFI_INVALID_PARAMETER  Time is NULL.\r
  @retval EFI_DEVICE_ERROR       The time could not be retrieved due to hardware error.\r
\r
**/\r
EFI_STATUS\r
PcRtcGetTime (\r
  OUT EFI_TIME              *Time,\r
  OUT EFI_TIME_CAPABILITIES *Capabilities, OPTIONAL\r
  IN  PC_RTC_MODULE_GLOBALS *Global\r
  );\r
\r
/**\r
  Sets the system wakeup alarm clock time.\r
\r
  @param  Enabled  Enable or disable the wakeup alarm.\r
  @param  Time     If Enable is TRUE, the time to set the wakeup alarm for.\r
                   If Enable is FALSE, then this parameter is optional, and may be NULL.\r
  @param  Global   For global use inside this module.\r
\r
  @retval EFI_SUCCESS           If Enable is TRUE, then the wakeup alarm was enabled.\r
                                If Enable is FALSE, then the wakeup alarm was disabled.\r
  @retval EFI_INVALID_PARAMETER A time field is out of range.\r
  @retval EFI_DEVICE_ERROR      The wakeup time could not be set due to a hardware error.\r
  @retval EFI_UNSUPPORTED       A wakeup timer is not supported on this platform.\r
\r
**/\r
EFI_STATUS\r
PcRtcSetWakeupTime (\r
  IN BOOLEAN                Enable,\r
  IN EFI_TIME               *Time,  OPTIONAL\r
  IN PC_RTC_MODULE_GLOBALS  *Global\r
  );\r
\r
/**\r
  Returns the current wakeup alarm clock setting.\r
\r
  @param  Enabled  Indicates if the alarm is currently enabled or disabled.\r
  @param  Pending  Indicates if the alarm signal is pending and requires acknowledgement.\r
  @param  Time     The current alarm setting.\r
  @param  Global   For global use inside this module.\r
\r
  @retval EFI_SUCCESS           The alarm settings were returned.\r
  @retval EFI_INVALID_PARAMETER Enabled is NULL.\r
  @retval EFI_INVALID_PARAMETER Pending is NULL.\r
  @retval EFI_INVALID_PARAMETER Time is NULL.\r
  @retval EFI_DEVICE_ERROR      The wakeup time could not be retrieved due to a hardware error.\r
  @retval EFI_UNSUPPORTED       A wakeup timer is not supported on this platform.\r
\r
**/\r
EFI_STATUS\r
PcRtcGetWakeupTime (\r
  OUT BOOLEAN               *Enabled,\r
  OUT BOOLEAN               *Pending,\r
  OUT EFI_TIME              *Time,\r
  IN  PC_RTC_MODULE_GLOBALS *Global\r
  );\r
\r
/**\r
  The user Entry Point for PcRTC module.\r
\r
  This is the entry point for PcRTC module. It installs the UEFI runtime service\r
  including GetTime(),SetTime(),GetWakeupTime(),and SetWakeupTime().\r
\r
  @param  ImageHandle    The firmware allocated handle for the EFI image.\r
  @param  SystemTable    A pointer to the EFI System Table.\r
\r
  @retval EFI_SUCCESS    The entry point is executed successfully.\r
  @retval Others         Some error occurs when executing this entry point.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
InitializePcRtc (\r
  IN EFI_HANDLE                            ImageHandle,\r
  IN EFI_SYSTEM_TABLE                      *SystemTable\r
  );\r
\r
/**\r
  See if all fields of a variable of EFI_TIME type is correct.\r
\r
  @param   Time   The time to be checked.\r
\r
  @retval  EFI_INVALID_PARAMETER  Some fields of Time are not correct.\r
  @retval  EFI_SUCCESS            Time is a valid EFI_TIME variable.\r
\r
**/\r
EFI_STATUS\r
RtcTimeFieldsValid (\r
  IN EFI_TIME *Time\r
  );\r
\r
/**\r
  Converts time from EFI_TIME format defined by UEFI spec to RTC format.\r
\r
  This function converts time from EFI_TIME format defined by UEFI spec to RTC format.\r
  If data mode of RTC is BCD, then converts EFI_TIME to it.\r
  If RTC is in 12-hour format, then converts EFI_TIME to it.\r
\r
  @param   Time       On input, the time data read from UEFI to convert\r
                      On output, the time converted to RTC format\r
  @param   RegisterB  Value of Register B of RTC, indicating data mode\r
**/\r
VOID\r
ConvertEfiTimeToRtcTime (\r
  IN OUT EFI_TIME        *Time,\r
  IN     RTC_REGISTER_B  RegisterB\r
  );\r
\r
\r
/**\r
  Converts time read from RTC to EFI_TIME format defined by UEFI spec.\r
\r
  This function converts raw time data read from RTC to the EFI_TIME format\r
  defined by UEFI spec.\r
  If data mode of RTC is BCD, then converts it to decimal,\r
  If RTC is in 12-hour format, then converts it to 24-hour format.\r
\r
  @param   Time       On input, the time data read from RTC to convert\r
                      On output, the time converted to UEFI format\r
  @param   RegisterB  Value of Register B of RTC, indicating data mode\r
                      and hour format.\r
\r
  @retval  EFI_INVALID_PARAMETER  Parameters passed in are invalid.\r
  @retval  EFI_SUCCESS            Convert RTC time to EFI time successfully.\r
\r
**/\r
EFI_STATUS\r
ConvertRtcTimeToEfiTime (\r
  IN OUT EFI_TIME        *Time,\r
  IN     RTC_REGISTER_B  RegisterB\r
  );\r
\r
/**\r
  Wait for a period for the RTC to be ready.\r
\r
  @param    Timeout  Tell how long it should take to wait.\r
\r
  @retval   EFI_DEVICE_ERROR   RTC device error.\r
  @retval   EFI_SUCCESS        RTC is updated and ready.\r
**/\r
EFI_STATUS\r
RtcWaitToUpdate (\r
  UINTN Timeout\r
  );\r
\r
/**\r
  See if field Day of an EFI_TIME is correct.\r
\r
  @param    Time   Its Day field is to be checked.\r
\r
  @retval   TRUE   Day field of Time is correct.\r
  @retval   FALSE  Day field of Time is NOT correct.\r
**/\r
BOOLEAN\r
DayValid (\r
  IN  EFI_TIME  *Time\r
  );\r
\r
/**\r
  Check if it is a leapyear.\r
\r
  @param    Time   The time to be checked.\r
\r
  @retval   TRUE   It is a leapyear.\r
  @retval   FALSE  It is NOT a leapyear.\r
**/\r
BOOLEAN\r
IsLeapYear (\r
  IN EFI_TIME   *Time\r
  );\r
\r
/**\r
  Get the century RTC address from the ACPI FADT table.\r
\r
  @return  The century RTC address or 0 if not found.\r
**/\r
UINT8\r
GetCenturyRtcAddress (\r
  VOID\r
  );\r
\r
/**\r
  Notification function of ACPI Table change.\r
\r
  This is a notification function registered on ACPI Table change event.\r
  It saves the Century address stored in ACPI FADT table.\r
\r
  @param  Event        Event whose notification function is being invoked.\r
  @param  Context      Pointer to the notification function's context.\r
\r
**/\r
VOID\r
EFIAPI\r
PcRtcAcpiTableChangeCallback (\r
  IN EFI_EVENT        Event,\r
  IN VOID             *Context\r
  );\r
#endif\r
Commit	Line	Data
	1	/** @file\r
	2	Header file for real time clock driver.\r
	3	\r
	4	Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
	5	Copyright (c) 2017, AMD Inc. All rights reserved.<BR>\r
	6	\r
	7	SPDX-License-Identifier: BSD-2-Clause-Patent\r
	8	\r
	9	**/\r
	10	\r
	11	\r
	12	#ifndef _RTC_H_\r
	13	#define _RTC_H_\r
	14	\r
	15	\r
	16	#include <Uefi.h>\r
	17	\r
	18	#include <Guid/Acpi.h>\r
	19	\r
	20	#include <Protocol/RealTimeClock.h>\r
	21	\r
	22	#include <Library/BaseLib.h>\r
	23	#include <Library/DebugLib.h>\r
	24	#include <Library/UefiLib.h>\r
	25	#include <Library/BaseMemoryLib.h>\r
	26	#include <Library/IoLib.h>\r
	27	#include <Library/TimerLib.h>\r
	28	#include <Library/UefiDriverEntryPoint.h>\r
	29	#include <Library/UefiBootServicesTableLib.h>\r
	30	#include <Library/UefiRuntimeLib.h>\r
	31	#include <Library/UefiRuntimeServicesTableLib.h>\r
	32	#include <Library/PcdLib.h>\r
	33	#include <Library/ReportStatusCodeLib.h>\r
	34	\r
	35	typedef struct {\r
	36	EFI_LOCK RtcLock;\r
	37	INT16 SavedTimeZone;\r
	38	UINT8 Daylight;\r
	39	UINT8 CenturyRtcAddress;\r
	40	} PC_RTC_MODULE_GLOBALS;\r
	41	\r
	42	extern PC_RTC_MODULE_GLOBALS mModuleGlobal;\r
	43	\r
	44	//\r
	45	// Dallas DS12C887 Real Time Clock\r
	46	//\r
	47	#define RTC_ADDRESS_SECONDS 0 // R/W Range 0..59\r
	48	#define RTC_ADDRESS_SECONDS_ALARM 1 // R/W Range 0..59\r
	49	#define RTC_ADDRESS_MINUTES 2 // R/W Range 0..59\r
	50	#define RTC_ADDRESS_MINUTES_ALARM 3 // R/W Range 0..59\r
	51	#define RTC_ADDRESS_HOURS 4 // R/W Range 1..12 or 0..23 Bit 7 is AM/PM\r
	52	#define RTC_ADDRESS_HOURS_ALARM 5 // R/W Range 1..12 or 0..23 Bit 7 is AM/PM\r
	53	#define RTC_ADDRESS_DAY_OF_THE_WEEK 6 // R/W Range 1..7\r
	54	#define RTC_ADDRESS_DAY_OF_THE_MONTH 7 // R/W Range 1..31\r
	55	#define RTC_ADDRESS_MONTH 8 // R/W Range 1..12\r
	56	#define RTC_ADDRESS_YEAR 9 // R/W Range 0..99\r
	57	#define RTC_ADDRESS_REGISTER_A 10 // R/W[0..6] R0[7]\r
	58	#define RTC_ADDRESS_REGISTER_B 11 // R/W\r
	59	#define RTC_ADDRESS_REGISTER_C 12 // RO\r
	60	#define RTC_ADDRESS_REGISTER_D 13 // RO\r
	61	//\r
	62	// Date and time initial values.\r
	63	// They are used if the RTC values are invalid during driver initialization\r
	64	//\r
	65	#define RTC_INIT_SECOND 0\r
	66	#define RTC_INIT_MINUTE 0\r
	67	#define RTC_INIT_HOUR 0\r
	68	#define RTC_INIT_DAY 1\r
	69	#define RTC_INIT_MONTH 1\r
	70	\r
	71	#pragma pack(1)\r
	72	//\r
	73	// Register A\r
	74	//\r
	75	typedef struct {\r
	76	UINT8 Rs : 4; // Rate Selection Bits\r
	77	UINT8 Dv : 3; // Divisor\r
	78	UINT8 Uip : 1; // Update in progress\r
	79	} RTC_REGISTER_A_BITS;\r
	80	\r
	81	typedef union {\r
	82	RTC_REGISTER_A_BITS Bits;\r
	83	UINT8 Data;\r
	84	} RTC_REGISTER_A;\r
	85	\r
	86	//\r
	87	// Register B\r
	88	//\r
	89	typedef struct {\r
	90	UINT8 Dse : 1; // 0 - Daylight saving disabled 1 - Daylight savings enabled\r
	91	UINT8 Mil : 1; // 0 - 12 hour mode 1 - 24 hour mode\r
	92	UINT8 Dm : 1; // 0 - BCD Format 1 - Binary Format\r
	93	UINT8 Sqwe : 1; // 0 - Disable SQWE output 1 - Enable SQWE output\r
	94	UINT8 Uie : 1; // 0 - Update INT disabled 1 - Update INT enabled\r
	95	UINT8 Aie : 1; // 0 - Alarm INT disabled 1 - Alarm INT Enabled\r
	96	UINT8 Pie : 1; // 0 - Periodic INT disabled 1 - Periodic INT Enabled\r
	97	UINT8 Set : 1; // 0 - Normal operation. 1 - Updates inhibited\r
	98	} RTC_REGISTER_B_BITS;\r
	99	\r
	100	typedef union {\r
	101	RTC_REGISTER_B_BITS Bits;\r
	102	UINT8 Data;\r
	103	} RTC_REGISTER_B;\r
	104	\r
	105	//\r
	106	// Register C\r
	107	//\r
	108	typedef struct {\r
	109	UINT8 Reserved : 4; // Read as zero. Can not be written.\r
	110	UINT8 Uf : 1; // Update End Interrupt Flag\r
	111	UINT8 Af : 1; // Alarm Interrupt Flag\r
	112	UINT8 Pf : 1; // Periodic Interrupt Flag\r
	113	UINT8 Irqf : 1; // Interrupt Request Flag = PF & PIE \| AF & AIE \| UF & UIE\r
	114	} RTC_REGISTER_C_BITS;\r
	115	\r
	116	typedef union {\r
	117	RTC_REGISTER_C_BITS Bits;\r
	118	UINT8 Data;\r
	119	} RTC_REGISTER_C;\r
	120	\r
	121	//\r
	122	// Register D\r
	123	//\r
	124	typedef struct {\r
	125	UINT8 Reserved : 7; // Read as zero. Can not be written.\r
	126	UINT8 Vrt : 1; // Valid RAM and Time\r
	127	} RTC_REGISTER_D_BITS;\r
	128	\r
	129	typedef union {\r
	130	RTC_REGISTER_D_BITS Bits;\r
	131	UINT8 Data;\r
	132	} RTC_REGISTER_D;\r
	133	\r
	134	#pragma pack()\r
	135	\r
	136	/**\r
	137	Initialize RTC.\r
	138	\r
	139	@param Global For global use inside this module.\r
	140	\r
	141	@retval EFI_DEVICE_ERROR Initialization failed due to device error.\r
	142	@retval EFI_SUCCESS Initialization successful.\r
	143	\r
	144	**/\r
	145	EFI_STATUS\r
	146	PcRtcInit (\r
	147	IN PC_RTC_MODULE_GLOBALS *Global\r
	148	);\r
	149	\r
	150	/**\r
	151	Sets the current local time and date information.\r
	152	\r
	153	@param Time A pointer to the current time.\r
	154	@param Global For global use inside this module.\r
	155	\r
	156	@retval EFI_SUCCESS The operation completed successfully.\r
	157	@retval EFI_INVALID_PARAMETER A time field is out of range.\r
	158	@retval EFI_DEVICE_ERROR The time could not be set due due to hardware error.\r
	159	\r
	160	**/\r
	161	EFI_STATUS\r
	162	PcRtcSetTime (\r
	163	IN EFI_TIME *Time,\r
	164	IN PC_RTC_MODULE_GLOBALS *Global\r
	165	);\r
	166	\r
	167	/**\r
	168	Returns the current time and date information, and the time-keeping capabilities\r
	169	of the hardware platform.\r
	170	\r
	171	@param Time A pointer to storage to receive a snapshot of the current time.\r
	172	@param Capabilities An optional pointer to a buffer to receive the real time clock\r
	173	device's capabilities.\r
	174	@param Global For global use inside this module.\r
	175	\r
	176	@retval EFI_SUCCESS The operation completed successfully.\r
	177	@retval EFI_INVALID_PARAMETER Time is NULL.\r
	178	@retval EFI_DEVICE_ERROR The time could not be retrieved due to hardware error.\r
	179	\r
	180	**/\r
	181	EFI_STATUS\r
	182	PcRtcGetTime (\r
	183	OUT EFI_TIME *Time,\r
	184	OUT EFI_TIME_CAPABILITIES *Capabilities, OPTIONAL\r
	185	IN PC_RTC_MODULE_GLOBALS *Global\r
	186	);\r
	187	\r
	188	/**\r
	189	Sets the system wakeup alarm clock time.\r
	190	\r
	191	@param Enabled Enable or disable the wakeup alarm.\r
	192	@param Time If Enable is TRUE, the time to set the wakeup alarm for.\r
	193	If Enable is FALSE, then this parameter is optional, and may be NULL.\r
	194	@param Global For global use inside this module.\r
	195	\r
	196	@retval EFI_SUCCESS If Enable is TRUE, then the wakeup alarm was enabled.\r
	197	If Enable is FALSE, then the wakeup alarm was disabled.\r
	198	@retval EFI_INVALID_PARAMETER A time field is out of range.\r
	199	@retval EFI_DEVICE_ERROR The wakeup time could not be set due to a hardware error.\r
	200	@retval EFI_UNSUPPORTED A wakeup timer is not supported on this platform.\r
	201	\r
	202	**/\r
	203	EFI_STATUS\r
	204	PcRtcSetWakeupTime (\r
	205	IN BOOLEAN Enable,\r
	206	IN EFI_TIME *Time, OPTIONAL\r
	207	IN PC_RTC_MODULE_GLOBALS *Global\r
	208	);\r
	209	\r
	210	/**\r
	211	Returns the current wakeup alarm clock setting.\r
	212	\r
	213	@param Enabled Indicates if the alarm is currently enabled or disabled.\r
	214	@param Pending Indicates if the alarm signal is pending and requires acknowledgement.\r
	215	@param Time The current alarm setting.\r
	216	@param Global For global use inside this module.\r
	217	\r
	218	@retval EFI_SUCCESS The alarm settings were returned.\r
	219	@retval EFI_INVALID_PARAMETER Enabled is NULL.\r
	220	@retval EFI_INVALID_PARAMETER Pending is NULL.\r
	221	@retval EFI_INVALID_PARAMETER Time is NULL.\r
	222	@retval EFI_DEVICE_ERROR The wakeup time could not be retrieved due to a hardware error.\r
	223	@retval EFI_UNSUPPORTED A wakeup timer is not supported on this platform.\r
	224	\r
	225	**/\r
	226	EFI_STATUS\r
	227	PcRtcGetWakeupTime (\r
	228	OUT BOOLEAN *Enabled,\r
	229	OUT BOOLEAN *Pending,\r
	230	OUT EFI_TIME *Time,\r
	231	IN PC_RTC_MODULE_GLOBALS *Global\r
	232	);\r
	233	\r
	234	/**\r
	235	The user Entry Point for PcRTC module.\r
	236	\r
	237	This is the entry point for PcRTC module. It installs the UEFI runtime service\r
	238	including GetTime(),SetTime(),GetWakeupTime(),and SetWakeupTime().\r
	239	\r
	240	@param ImageHandle The firmware allocated handle for the EFI image.\r
	241	@param SystemTable A pointer to the EFI System Table.\r
	242	\r
	243	@retval EFI_SUCCESS The entry point is executed successfully.\r
	244	@retval Others Some error occurs when executing this entry point.\r
	245	\r
	246	**/\r
	247	EFI_STATUS\r
	248	EFIAPI\r
	249	InitializePcRtc (\r
	250	IN EFI_HANDLE ImageHandle,\r
	251	IN EFI_SYSTEM_TABLE *SystemTable\r
	252	);\r
	253	\r
	254	/**\r
	255	See if all fields of a variable of EFI_TIME type is correct.\r
	256	\r
	257	@param Time The time to be checked.\r
	258	\r
	259	@retval EFI_INVALID_PARAMETER Some fields of Time are not correct.\r
	260	@retval EFI_SUCCESS Time is a valid EFI_TIME variable.\r
	261	\r
	262	**/\r
	263	EFI_STATUS\r
	264	RtcTimeFieldsValid (\r
	265	IN EFI_TIME *Time\r
	266	);\r
	267	\r
	268	/**\r
	269	Converts time from EFI_TIME format defined by UEFI spec to RTC format.\r
	270	\r
	271	This function converts time from EFI_TIME format defined by UEFI spec to RTC format.\r
	272	If data mode of RTC is BCD, then converts EFI_TIME to it.\r
	273	If RTC is in 12-hour format, then converts EFI_TIME to it.\r
	274	\r
	275	@param Time On input, the time data read from UEFI to convert\r
	276	On output, the time converted to RTC format\r
	277	@param RegisterB Value of Register B of RTC, indicating data mode\r
	278	**/\r
	279	VOID\r
	280	ConvertEfiTimeToRtcTime (\r
	281	IN OUT EFI_TIME *Time,\r
	282	IN RTC_REGISTER_B RegisterB\r
	283	);\r
	284	\r
	285	\r
	286	/**\r
	287	Converts time read from RTC to EFI_TIME format defined by UEFI spec.\r
	288	\r
	289	This function converts raw time data read from RTC to the EFI_TIME format\r
	290	defined by UEFI spec.\r
	291	If data mode of RTC is BCD, then converts it to decimal,\r
	292	If RTC is in 12-hour format, then converts it to 24-hour format.\r
	293	\r
	294	@param Time On input, the time data read from RTC to convert\r
	295	On output, the time converted to UEFI format\r
	296	@param RegisterB Value of Register B of RTC, indicating data mode\r
	297	and hour format.\r
	298	\r
	299	@retval EFI_INVALID_PARAMETER Parameters passed in are invalid.\r
	300	@retval EFI_SUCCESS Convert RTC time to EFI time successfully.\r
	301	\r
	302	**/\r
	303	EFI_STATUS\r
	304	ConvertRtcTimeToEfiTime (\r
	305	IN OUT EFI_TIME *Time,\r
	306	IN RTC_REGISTER_B RegisterB\r
	307	);\r
	308	\r
	309	/**\r
	310	Wait for a period for the RTC to be ready.\r
	311	\r
	312	@param Timeout Tell how long it should take to wait.\r
	313	\r
	314	@retval EFI_DEVICE_ERROR RTC device error.\r
	315	@retval EFI_SUCCESS RTC is updated and ready.\r
	316	**/\r
	317	EFI_STATUS\r
	318	RtcWaitToUpdate (\r
	319	UINTN Timeout\r
	320	);\r
	321	\r
	322	/**\r
	323	See if field Day of an EFI_TIME is correct.\r
	324	\r
	325	@param Time Its Day field is to be checked.\r
	326	\r
	327	@retval TRUE Day field of Time is correct.\r
	328	@retval FALSE Day field of Time is NOT correct.\r
	329	**/\r
	330	BOOLEAN\r
	331	DayValid (\r
	332	IN EFI_TIME *Time\r
	333	);\r
	334	\r
	335	/**\r
	336	Check if it is a leapyear.\r
	337	\r
	338	@param Time The time to be checked.\r
	339	\r
	340	@retval TRUE It is a leapyear.\r
	341	@retval FALSE It is NOT a leapyear.\r
	342	**/\r
	343	BOOLEAN\r
	344	IsLeapYear (\r
	345	IN EFI_TIME *Time\r
	346	);\r
	347	\r
	348	/**\r
	349	Get the century RTC address from the ACPI FADT table.\r
	350	\r
	351	@return The century RTC address or 0 if not found.\r
	352	**/\r
	353	UINT8\r
	354	GetCenturyRtcAddress (\r
	355	VOID\r
	356	);\r
	357	\r
	358	/**\r
	359	Notification function of ACPI Table change.\r
	360	\r
	361	This is a notification function registered on ACPI Table change event.\r
	362	It saves the Century address stored in ACPI FADT table.\r
	363	\r
	364	@param Event Event whose notification function is being invoked.\r
	365	@param Context Pointer to the notification function's context.\r
	366	\r
	367	**/\r
	368	VOID\r
	369	EFIAPI\r
	370	PcRtcAcpiTableChangeCallback (\r
	371	IN EFI_EVENT Event,\r
	372	IN VOID *Context\r
	373	);\r
	374	#endif\r