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Registered: ‎04-18-2019

Reset proof ram witn ZynqMP

Hello,

I've been trying to enable reset proof ram on warm reset, with rpram module. I'm using zynqmp based board with 1GB of DDR4 on PS side. SDK version is 2019.1. ECC is disabled.

I've set:

#define FSBL_DDR_SR_EXCLUDE_VAL(0U)
in xfsbl_config.h.
Appropriate dts entry:
mtdpart_rp_ram_postmortem@3EFFF000 {
                mtdname = "rpram";
                address = "0x3EFFF000";
                size = "0x1000000";
};
Yet, when I stop booting process at u-boot I see, that this memory is already zeroed.
Could please suggest what else, appart from enabling ddr sf, is required in order to achieve persistent ram?
 
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