LX2160A System Memory Map

156614400 — Tue, 11 Aug 2020 07:30:28 GMT

in LX2160ARM.pdf , System Memory Map, the ddr ram map the 0x0000_8000_0000 , but this region is only 2G. LX2160A-RDB board have 2 ddr slot, if have 256G ddr , what address it map ???

the ddr ram is maped to diffrent divided address ??

like this ?

0x0000_8000_0000 ------ 0x0000_9FFF_FFFF (2G)
0x0020_8000_0000 ------ 0x003F_FFFF_FFFF (128G)

0x0060_0000_0000 ---- (126G)

thanks

Re: LX2160A System Memory Map

ufedor — Tue, 11 Aug 2020 10:25:34 GMT

> the ddr ram is maped to diffrent divided address ??

Yes - refer to the QorIQ LX2160A Reference Manual, 2.2 System Memory Map.

According to the ARM Architecture SoC address to DRAM address remapping is preformed for the LX2160A as follows:

SoC Address	Size	Address presented to the DDR Controller
0x00_8000_0000 - 0x00_FFFF_FFFF	2GB	0x00_0000_0000 - 0x00_7FFF_FFFF
0x20_8000_0000 - 0x3F_FFFF_FFFF	126GB	0x00_8000_0000 - 0x1F_FFFF_FFFF
0x60_0000_0000 - 0x7F_FFFF_FFFF	128GB	0x20_0000_0000 - 0x3F_FFFF_FFFF

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LX2160A System Memory Map

Re: LX2160A System Memory Map