From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefan Roese <sr@denx.de>
Date: Wed, 8 Oct 2008 07:17:02 +0200
Subject: [U-Boot] SDRAM controller initialization code
In-Reply-To: <3624b2b40810071234o4ce4677fk2888de82031b0c65@mail.gmail.com>
References: <3624b2b40810071234o4ce4677fk2888de82031b0c65@mail.gmail.com>
Message-ID: <200810080717.02544.sr@denx.de>
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To: u-boot@lists.denx.de

On Tuesday 07 October 2008, Muzammil Ahmed wrote:
> I'm using Yosemite board (PPC440EP) for my development with U-Boot firmware
> version 1.3.4.
>
> Where in source code, I can find code regarding 'initializaiton of SDRAM
> controller'?

Its the function initdram() in board/amcc/yosemite/yosemite.c. Please note 
that I'm not referring to v1.3.4 but to the latest version.

Also I recommend not to use this code for a custom board but to use the code 
available in cpu/ppc4xx/sdram.c. A good example is the p4p440 board support. 
Depending on the SDRAM configuration you have you only need to configure this 
(or similar) in your board config header:

#define CONFIG_SDRAM_BANK0      1       /* init onboard DDR SDRAM bank 0*/
#define CFG_SDRAM_TABLE { \
                {(256 << 20), 13, 0x000C4001}, /* 256MB mode 3, 13x10(4)*/ \
                {(64 << 20),  12, 0x00082001}} /* 64MB mode 2, 12x9(4)  */

> Also, code regarding 'initialization of EBC'?

The EBC init code is in cpu/ppc4xx/cpu_init.c: cpu_init_f(). But you don't 
need to change this code for your board but only define the correct 
CFG_EBC_PBxAB/CR values in your board config header.

Best regards,
Stefan

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