Access DDR through PL and Linux

[3008202060]

Hi all,

How could I read or write a specific address of the DDR in the linux project?  I used PL part to write some data to DDR then I need to read those data from Linux part.

I use Zedboard. The vivado verision is 2018.2, petalinux version is 2018.2. 

Thanks.

[yetanotherid]

Petalinux includes the example applications "peek" and "poke" that demonstrate reading and writing to memory. Basically you're opening /dev/mem and having your way with it. Note that linux will not allow you to read/write to any location of your choosing from userland--you need a kernel driver to get full access.