[U-Boot] MPC8536DS Evaluation Board Force DDR Setting cannot bedone properly

[Hu Mingkai-B21284]

> -----Original Message-----
> From: u-boot-bounces at lists.denx.de 
> [mailto:u-boot-bounces at lists.denx.de] On Behalf Of AgarwalAshish
> Sent: Friday, May 15, 2009 3:27 PM
> To: u-boot at lists.denx.de
> Cc: ashish.g at teldevice.co.jp
> Subject: [U-Boot] MPC8536DS Evaluation Board Force DDR 
> Setting cannot bedone properly
> 
> Hello All,
> 
> I am Ashish Agarwal.
> 
> Currently i am working on the MPC8536DS Freescale Development 
> system evaluation and the Uboot development for a customized board.
> 
> -------------------------------------------------------
> Problem 1 : DDR Force setting
> -------------------------------------------------------
> when i try to force setting of DDR parameter over 8536DS 
> board through the
>     #define CONFIG_SPD_EEPROM           -> #undef CONFIG_SPD_EEPROM
>     #define CONFIG_DDR_SPD              -> #undef CONFIG_DDR_SPD
> 
> the compile giver me error about "CONFIG_SPD_EEPROM is 
> required" as this is written at the bottom place of 
> include/configs/MPC8536ds.h file
> 
> becuase we want to set forcly DDR parameters so I commented 
> these lines too ====================================================
> #ifndef CONFIG_SPD_EEPROM
> #error ("CONFIG_SPD_EEPROM is required") #endif 
> ====================================================
> DDR Force parameter were set as they were set when i complied 
> the source with SPD setting. [Dumped from the Uboot]. 
> They have to work for Force DDR setting too ;)   but they are 
> not working. 
> 
> 
> I was able to compile the souce and dowloading of uboot to 
> the FLASH. but ubootis stuck in between.
> 
> I stuck somewhere arround
> "realocate_code" the next step of u-boot print statements 
> where i am reaching upto is "Now Running in RAM- U-Boot at: %0x ".
> 
> and as i am not able to debugg u-boot via the CW it is 
> paining me to get rid out of this all stuff. 
> 
> [UBoot Debug for the MPC8536DS is not rleased yet they might 
> be supported in 8.8.3 version of CW :( ] 
> 
> though i had done DDR parameter work for the VxWorks OS DDR 
> Parameter setting [so i now how to calculate those]
> 
> --> is it the source problem ?? 
>      The DDR parameter settings via "phys_size_t 
> fixed_sdram(void)" function. or it is the other issue ??
>    is i am missing something. 
> 

Did you modify the the DDR memory size according to your DIMM in the
function fixed_sdram()?

Best Regards,
Mingkai