Intel Extensible Firmware Interface - Manual (Page 202)

Extensible Firmware Interface Specification
6-10 12/01/02 Version 1.10
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;