
Leif,
I have managed to flashed a 36-bits u-boot to my p4080 board.
I have put in two 4Gb dimm into the board but it doesn't work.
I got the following from u-boot.
[snip]
DRAM: Initializing....
Error: DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] should not be set at the same time.
"RD_EN" means "registered DIMM enable" which is read from PROM on memory module.
Looks like you have CONFIG_DDR_2T_TIMING defined in your board header ... which is mutually exclusive with registered DIMM usage. 2T timing is only useful if you have AC timing violations regarding setup/hold on Addr/Cmd Bus.
Error: DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] should not be set at the same time.
6144M left unmapped
DDR: 8 GB
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It seams that it is something wrong with the DDR initiation.
no.
You can either use unregistered DIMM modules or simply undefine CONFIG_DDR_2T_TIMING.
Cheers, André
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