Intel Extensible Firmware Interface, Specification

Page: 103 / 494

Services
Version 1.02 12/12/00 85
3.6.1 GetTime()
Summary
Returns the current time and date information, and the time-keeping capabilities of the hardware
platform.
Prototype
EFI_STATUS
GetTime (
OUT EFI_TIME *Time,
OUT EFI_TIME_CAPABILITIES *Capabilities OPTIONAL
);
Parameters
Time
A pointer to storage to receive a snapshot of the current time. Type
EFI_TIME
is defined in “Related Definitions”.
Capabilities
An optional pointer to a buffer to receive the real time clock device’s
capabilities. Type
EFI_TIME_CAPABILITIES
is defined in “Related
Definitions”.
Related Definitions
//*******************************************************
//EFI_TIME
//*******************************************************
// This represents the current time information
typedef struct {
UINT16 Year ; // 1998 – 20XX
UINT8 Month ; // 1 – 12
UINT8 Day ; // 1 – 31
UINT8 Hour ; // 0 – 23
UINT8 Minute ; // 0 – 59
UINT8 Second ; // 0 – 59
UINT8 Pad1 ;
UINT32 Nanosecond ; // 0 – 999,999,999
INT16 TimeZone ; // -1440 to 1440 or 2047
UINT8 Daylight ;
UINT8 Pad2 ;
} EFI_TIME;