[U-Boot-Users] get_ram_size() returns wrong value

[Wolfgang Denk]

In message <9b7ca65705040605525c3317b5 at mail.gmail.com> you wrote:
>
> > How is maxsize defined in your configuration?
> 
> maxsize is configured as,
> #define CFG_MAX_RAM_SIZE    0x08000000  /* 0 .. 128 MB of (S)DRAM */

Try doubling it ;-)

> > How is your memory controller configured (address masks) ?
> 
> #define CFG_BANK0_START     0x00000000
> #define CFG_BANK0_END       (CFG_MAX_RAM_SIZE/2 - 1)
> #define CFG_BANK0_ENABLE    1
> #define CFG_BANK1_START     (CFG_MAX_RAM_SIZE/2)
> #define CFG_BANK1_END       (CFG_MAX_RAM_SIZE - 1)
> #define CFG_BANK1_ENABLE    1

Umm.. this seems bogus to me. If the actual size is  !=  MAX_RAM_SIZE
thenyou  will  have a hole in your mapping; this is not what you want
to do. See the README how to handle such a situation.

> BTW, is it right by simply halving the MAX value ? I sort of guessed

No, this is ... bogus.

> this part. Looked at schemetics and they used 2 chip selects. So, I
> figured halving it. Is it cool ?

Definitely not.

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
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