topic How to use 4GB memory with LS1043ARDB in Layerscape

How to use 4GB memory with LS1043ARDB

lion3875 — Tue, 03 Apr 2018 09:37:49 GMT

Hello:

i want to use 4GB memory with LS1043ARDB in linux, does anyone know how to implementing.

Re: How to use 4GB memory with LS1043ARDB

Pavel — Wed, 04 Apr 2018 05:38:11 GMT

Look at attached files. These files are available in u-boot from LSDK 1712.

Find the dram_init_banksize procedure in the cpu.c file. This procedure shows that u-boot remapes DRAM if DRAM size is more then 2GB.

The cpu.c file is available using the following path:

flexbuild/packages/firmware/u-boot/arch/arm/cpu/armv8/fsl-layerscape

Have a great day,
Pavel Chubakov

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Re: How to use 4GB memory with LS1043ARDB

lion3875 — Sun, 08 Apr 2018 08:19:43 GMT

Hello Pavel, thank you very much, i have solved this problem, the reason of problem is ROW_BIT is incorrect, it's should be 16, but i set it to 15

n_row_addr , should be 16, 4GB can work now.