On Thursday 17 December 2009 17:48:48 Wolfgang Denk wrote:
Mike Frysinger wrote:
like this is an optional board-specific function that probes external memory sizes by reading/writing to it.
Right, with at least two purposes: detecting memroy errors, and determining the available memory size.
the memory error checking is kind of lame. i cant imagine it catching anything useful which the board crashing doesnt already tell you -- things are screwed.
on a Blackfin system, this is a pretty big waste. memory must always be
Waste in terms of ... ?
if it's only detecting memory, then probing all the way down to the base is a waste of time.
mapped starting at address 0 which means once the highest address is validated, things can return. ignoring that, the Blackfin port has no relocation support, so the link time addresses are fixed.
The memory test alone is a pretty good reason to add this. And don;t you have boards with multiple configurations / different RAM sizes where auto-sizing would be useful?
not really, and we havent had a customer ask for this kind of functionality. we do however get people always asking for faster loading times. -mike