Westin,
You will be using the PC as the base address, and you need to put the address within reach of a pc-relative LDR.
So you'll do:
LDR PC, test_addr
...
test_addr .word 0x0803FF00
You just need to make sure there's not too much code between the LDR and the '.word'.
This will translate to LDR PC, [PC, #offset]. I don't remember the reach of the offset off hand but it's not that big.
For a short though this shouldn't be an issue.
You can google 'arm literal pool' and find out more about this method, we do not however support the '=' syntax in the TI assembler so you have to put the .word in yourself.