BIOS for Samsung S3C4510B

Hi,

I have an evaluation board using S3C4510B without the source code for boot loader, and I am gona write one.

Now the problem is that I don't know how to initialize the SDRAM on it.
I've seen some SDRAM control register on other boards not using S3C4510B. But there is no such control register in the spec of S3C4510B, right ?

I've spent some time tracing this project and found that there is a setup_dram() function. However, I can't understand the operation in this function.

I've got the spec of my SDRAM, but I don't know how to trigger the operations like pre-charge, NOP on my board.

I hope somebody can give me hints about initializing the SDRAM.
Thanks a lot in advance.

skychaser