Kim Phillips schrieb: 
On Tue, 25 Mar 2008 20:41:41 +0100
Andre Schwarz <andre.schwarz@matrix-vision.de> wrote:

  
Kim Phillips schrieb:
    
On Tue, 25 Mar 2008 18:36:47 +0100
Andre Schwarz <andre.schwarz@matrix-vision.de> wrote:
      
As far as I can see there are only DDR-I boards from Freescale.

    
        
The MDS can do ddr2:

U-Boot 1.3.2-00097-gbc508d1 (Mar 25 2008 - 10:47:17) MPC83XX

Reset Status: Software Hard, External/Internal Soft, External/Internal Hard

CPU:   e300c1, MPC8349E, Rev: 30 at 528 MHz, CSB:  264 MHz
Board: Freescale MPC8349EMDS
I2C:   ready
SPI:   ready
DRAM:  256 MB (DDR2, 64-bit, ECC on)
...

  
      
Hmmm ... I get :

U-Boot 1.3.2-00075-gc5f497a-dirty (Mar 25 2008 - 19:55:00) MPC83XX

Reset Status: Check Stop, External/Internal Soft, External/Internal Hard

CPU:   e300c1, MPC8343, Rev: 31 at 399.999 MHz, CSB:  266 MHz
Board: Matrix Vision mvBlueLYNX-M7
I2C:   ready
SPI:   ready
DRAM:  cs0_bnds = 0x0000000f
cs0_config = 0x80844102
DDR:bar=0x00000000
DDR:ar=0x8000001b
256 MB


It's a 32-Bit DDR-II without ECC.
2 Chips are soldered to CS0, i.e. no EPROM present.

Since I expect something like "(DDR2, 32-Bit, ECC off)" and nothing 
happens there is obviously something wrong with my memory setup.
Is this reasonable ?
    

sounds like memory isn't being configured correctly.  Board specific?
Having a closer look to the boards show that I'm currently using 2 Micron MT47H256M8HG-3 with 2GBit each yielding a total of 512MByte DDR-II memory .... this is sad :-(
Regarding to part list there should have been 1GBit Elpida chips on it.


I've seen things like this in mpc8349emds code :

#if (CFG_DDR_SIZE != 256)
#warning Currenly any ddr size other than 256 is not supported
#endif

Is this reasonable ? Why ?

  
Or am I simply missing a board specific "board_add_ram_info" ?
    

you can do that if you really, really, really want to see the "(DDR2.."
string, but it's optional.
I don't want to see it but to understand where it comes from.

  

    
Am I assuming right that your info string "(DDR2, 64-bit, ECC on)" comes 
from spd_sdram  ?
    

  

  

yes.

Kim
  





regards,

Andre




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