[U-Boot-Users] memory probe

[Wolfgang Denk]

In message <1115885736.9698.2.camel at orionlinux.starfleet.com> you wrote:
> 
> > No need to do this.  If  implemented  correctly,  U-Boot  will  auto-
> > matically  find  out  how  big  your  RAM.  This is what the RAM size
> > detection code in common/memsize.c was made for. Just use it.
> 
> Yes, but you still need to read the DIP switch in the memsetup.S

No, this is NOT necessary.

> to properly initialise SDRAM. You can use this code only to report
> the memory size to U-Boot and the Linux.

No, this code is used to ADJUST the memory controller to  the  actual
sizes found on the board - you start with a preliminary configuration
of  the  memory  controller which assumes that all possible banks are
fitted with the maximum amountof memory; then you run  get_ram_size()
on  all  of these banks, disable those where a size of 0 is reported,
and adjust controller settings according to the  sizes  reported  for
the others.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Panic, n.: The second time you can't do it the first time.