[U-Boot] Seeing only 256MB of RAM

[John Tobias]

Hi All,


I have an iMX6SL custom board with two 512 MB (CS0 and CS1) of DDR3.
The two DDR are working fine and the kernel could see it 1GB. I need
to disable the CS1 to work my device with 512MB at the same time to
see the performance of my system. I used the MX6SL_MMDC_DDR3_register
programming
v0.5 to disable the CS1.

Here are the summary of the new settings:


// Manufacturer: Micron
// Clock Freq.: 400MHz
// Density per CS in Gb: 4
// Chip Selects used: 1
// Total DRAM density (Gb) 4
// Number of Banks: 8
// Row address:     14
// Column address: 10
// Data bus width 16


In my u-boot config file, I changed default value of PHYS_SDRAM_SIZE
from SZ_1GB to SZ_512M

The problem right now is that the kernel only seeing  256M instead of
512M. I would like to know if I am missing something on my
configuration?.


Regards,


John