Physical memory access (when not running with a manager)

[David Frascone]

I'm sure this has an easy answer, but it's been eluding me:

I need grub, when booting, to grab some values from a particular memory 
address (in flash).  My code runs fine, on the platform . .

BUT -- I use the same code to *install* grub from linux, where it can 
not access the physical memory address.  So -- is there any way to have 
stage2 only access the location when not running under an OS (i.e. when 
booting)?

-Dave

--

David Frascone

                             Oxymoron: Reinvent.