Intel Extensible Firmware Interface Specification page 340

Extensible Firmware Interface Specification
FilePathList
OptionalData
Related Definitions
//*******************************************************
// Attributes
//*******************************************************
#define LOAD_OPTION_ACTIVE
Description
Calling
SetVariable()
of the
DataSize
creating a new load option, all undefined attribute bits must be written as zero. When updating a
load option, all undefined attribute bits must be preserved. If a load option is not marked as
LOAD_OPTION_ACTIVE,
provides an easy way to disable or enable load options without needing to delete and re-add them.
322
A packed array of EFI device paths. The first element of the array is an
EFI device path that describes the device and location of the Image for
this load option. The
type. Other device paths may optionally exist in the FilePathList,
but their usage is OSV specific. Each element in the array is variable
length, and ends at the device path end structure. Because the size of
is arbitrary, this data structure is not guaranteed to be
Description
aligned on a natural boundary. This data structure may have to be copied
to an aligned natural boundary before it is used.
The remaining bytes in the load option variable are a binary data buffer
that is passed to the loaded image. If the field is zero bytes long, a Null
pointer is passed to the loaded image.
creates a load option. The size of the load option is the same as the size
argument to the
SetVariable()
the boot manager will not automatically load the option. This
12/12/00
is specific to the device
FilePathList[0]
0x00000001
call that created the variable. When
Version 1.02