[U-Boot-Users] problems about flash setting
wd at denx.de
Sat Oct 18 22:36:07 CEST 2003
In message <3a57b3d292.3d2923a57b at rails.com.cn> you wrote:
> sorry ,but i really don't understand.
Did you try searching the archives?
> 1.What's the meaning of flash memory banks,is the number of flash
> chips? ie:if i have 2 chips of 29f040s on my board,then the
> CFG_MAX_FLASH_BANKS should be 2,right?
No - a bank of flash memory is what gets accesses using one specific
chip select line.
Maybe - it depens how your flash is organised - 4 chips can be just
one bank of memory, for example if you use 4 chips of 8 bit to form a
32 bit wode bus.
> 2.What's the meaning of FLASH_BASE0_PRELIM and FLASH_BASE1_PRELIM,
These are the base addresses for the first and the second flash bank
as used by the preliminary mappings. See the README, section System
> Is the FLASH_BASE0_PRELIM should be set to the flash_base_addr that
> defined by cs0? Then what about flash_base1_prelim?
See the README.
> 3.What's the difference between br/or_prelim and br/or_remap and
> respective function ??Is the br/or_remap must be set or optional
> depended on my board?
See the README.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
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