[U-Boot] Is it possible to use 1GB or DDR on MPC8360 with e300 core?

[remya pillai]

Hi Kim

Thanks for the reply.

I would like to make my situation more clear to you.

CONFIG_SPD_EEPROM is defined in my board config file already. I could read
the following spd eeprom info also. From this, its clear that we have enough
hardware to provide 1GB memory.

*DIMM type:       JKCS38UKA 1GB
SPD size:        128
EEPROM size:     256
Memory type:     8
Row addr:        14
Column addr:     10
# of rows:       96
Row density:     1
# of banks:      8
Data width:      72
Chip width:      8
Refresh rate:    82
CAS latencies:   38
Write latencies: 04
tRP:             60
**tRCD:            60*

In mpc8360e , we have 8 BAT registers each has 256MB max size. I tried to
club 4 bat registers to get 1GB RAM space. But Its failing.

"board info" structure, which passes the u-boot parameters to linux kernel
has ram_size= 1GB. Also the DDRLAWBAR & DDRLAWAR registers are configured
for 1GB. But still I could transfer only 256MB to DRAM in the u-boot level.

Is it a u-boot limitation?  I am very new to u-boot &  kernel. So pls help
me out.

Regards
Remya






On Wed, Jun 9, 2010 at 9:58 PM, Kim Phillips <kim.phillips at freescale.com>wrote:

> On Wed, 9 Jun 2010 17:31:13 +0530
> remya pillai <remya.pillai at dnsoftsol.com> wrote:
>
> > I have an mpc8360e processor (has e300 core and QE) for our networking
> > application. I have to use 1GB DRAM module in my board, but u-boot for
> > powerpc is not supporting that. It is supporting only 256MB DRAM module.
>
> Apparently DDR is set up manually in the u-boot port of your board -
> try defining CONFIG_SPD_EEPROM in your board config, or reconfigure its
> static DDR parameters.
>
> Kim
>



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