In DriverSampleDxe, the boot order item is listed in storage as:
UINT16 BootOrder[8];
And here is the ordered list which manipulates this item:
orderedlist
varid = MyIfrNVData.BootOrder,
prompt = STRING_TOKEN(0x006D),
help = STRING_TOKEN(0x0059),
option text = STRING_TOKEN(0x006F), value = 2, flags =
RESET_REQUIRED;
option text = STRING_TOKEN(0x006E), value = 1, flags =
RESET_REQUIRED;
option text = STRING_TOKEN(0x0070), value = 3, flags =
RESET_REQUIRED;
suppressif ideqval MyIfrNVData.BootOrderLarge == 0;
option text = STRING_TOKEN(0x0071), value = 4, flags =
RESET_REQUIRED;
endif
endlist;
This leads to a number of questions:
1) The BootOrder is defined as UINT16, but the UEFI specification clearly
states that an orderedlist will work on a buffer with one byte per container.
(See 29.2.5.4.8 where it says, "The set questions are stored as a Buffer with
one byte for each Container."
2) The option values are all integers. But the storage type of an ordered
list is a BUFFER. To me this implies (I haven't looked this up) that the value
an option is being used as the option for a single container. That makes sense,
but it is not the behavior described in the UEFI specification. Also, there
seems to be no way to create a value for a question of type buffer.
3) Likewise, there seems to be no way to provide a default for an ordered
list.
Tim
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