RE: [U-Boot-Users] A question about sdram_init

Hello Frank!

Sorry, wrong function name. I've corrected in the second post. The problem happens in cpu/ppc4xx/sdram.c -> sdram_init().

OK. I wrote this code, so here a few comments.

We are using this code on a least 10 different PPC405 boards without any problems (even with 4 Mbytes of SDRAM).

When you stripped the code to 3 lines only you probably missed those lines:

... mtsdram0(mem_sdtr1, sdtr1); mtsdram0(mem_rtr, rtr);

Some of the sdram regs don't get initialized at all with your code! This could cause serious problems!

Some further questions:

Why did you change the code in the first place?

You speak of 8MBytes of SDRAM. Do you have 2 banks each 4MByte? This code only supports the first bank.

Best regards, Stefan Roese