Hi Stefano,
On 14 May 2014 18:18, Stefano Babic sbabic@denx.de wrote:
The main question is also if a large DCD table is needed. The DCD is supposed in U-Boot to set up the minimal requirement to let the processor to copy the u-boot image into RAM ....
The register setup for the RAM we use on our iMX6D board exceeded the maximum 121 entries. It is a 2GByte lpddr2, arranged to use both MMDC channels on the processor. I blindly used the register sequence generated by the tool "i.Mx6DQSDL LPDDR2 Script Aid" provided by freescale.
- the rest can be done in
U-Boot code after the boot ROM has completed its job.
Maybe the strategy for my board is to setup one channel only in DCD, then the rest in uboot? But, I wonder if this strategy would work for the iMX6D "4KB-interleave" ddr memory mapping mode we intend to use? Currently we use the "fixed"/flat memory mapping...
Regards, Arne.