[U-Boot] new board SDRAM conf

[Stefan Roese <sr@denx.de>]

Hi Steven,

On Monday 03 November 2008, ??? wrote:
> I Made my board config header, and using yosemite's init.S & u-boot.lds,
> mft.c(Yosemite.c) Only change config header , but it's not working .

You should create your own board port for this custom 440EP board.

> 1. First The difference of my SDRAM configuration is
> ***  (PPC440EP supported four external DDR_SDRAM Banks.) ***
> But Our used only external DDR_SDRAM Bank_0(BANKSEL_0) on the New design
> Board.

Yes. I already described how you should handle this DDR initialization in my 
last mail. Use the common code (cpu/ppc4xx/sdram.c). You probably need to 
change the CONFIG_SYS_SDRAM_TABLE for your board. Take a look at the p3p440.h 
header as an example.

BTW: SDRAM configuration is a complex matter. You definitely need to take a 
look at the PPC users manual and the SDRAM datasheet for this.

Best regards,
Stefan

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