23 Nov
2004
23 Nov
'04
3:46 p.m.
Peter Asemann wrote:
Well, I think it *must* be that way, but to be sure I ask this probably question, though:
If a MPC875 starts, it will try to boot from the device selected by chip-select 0 (CS0), unless otherwise stated in the hard reset configuration word. It will then try to access a flash/eprom/something device via the "GPCM" memory controller. In order for this to work, the GPCM of the CPU must be possible to access a flash/eprom without prior configuration when booting.
How else could it boot otherwise? ;-)
Have a look at the power up default values of the GPCM config registers. You will see that their (most probably) set to meet the requirements for standard flash devices...
-- Steven