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Why imx8mq DRAM Address Start from 0x40000000??

Question asked by Hanson Chung on Oct 8, 2019
Latest reply on Oct 9, 2019 by Yuri Muhin
Branched to a new discussion

Hi 

I find the code in uboot include/configs/imx8mq_evk.h

CONFIG_SYS_SDRAM_BASE   0x40000000   //Start from 1GB??

PHY_SDRAM                              0x40000000   //Start from 1GB??

PHY_SDRAM_SIZE                     0xc0000000   //3GB

 

 

and Kernel device tree memory map

 

memory@0x40000000         //Start from 1GB????

{

   device_type= "memory";

   reg=<0x00000000 0x40000000 0 0xc0000000>   //whats the meaning ??<START ADDRSS 64bit ,  SIZE 64bit > from 1GB to 3GB ??

}

 

 

hanson

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