How can I modify LS1046A RCW settings for FPGA configuration?

2sanghaesea — Tue, 02 Sep 2025 11:18:30 GMT

We are using an assembly of 9 boards, and each board contains one FPGA.

Among them, only one board has the CPU(LS1046A) and the central control FPGA.

Our board is configured to boot from eMMC.

I modified the U-Boot source code and increased the IFC_AMASK2 value from the default 64KB to 1MB.

We plan to access these boards using the addresses 0x7FBx_0000 (where x = 0 ~ 8 is used for board selection).

The central control FPGA reads ifc_a[27:16], and among them, ifc_a[19:16] is used for board selection.

Our expectation is that:

Below I have attached my RCW source, the U-Boot source, and two schematics showing the FPGA connections.

Best regards

Re: How can I modify LS1046A RCW settings for FPGA configuration?

LFGP — Tue, 02 Sep 2025 17:38:10 GMT

I hope you are doing well.

please don't use the next signals (even if you reconfigured them into the RCW), use them just for booting, the rest of the signals are ok.

LFGP