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F133: Write OpenSBI to DDR and Execute

This example shows how to use XFEL to initialize DDR, load OpenSBI into memory and execute it on the D1/F133.

Applicable chips​

  • D1 / D1s / F133 (XuanTie C906 RISC-V)

Steps​

xfel ddr f133                          # Initialize the DDR controller for F133
xfel write 0x80200000 opensbi.bin      # Write OpenSBI to 0x80200000
xfel exec 0x80200000                   # Call the function address and execute

Explanation​

  1. xfel ddr f133 initializes the memory controller with the F133-specific DDR configuration;
  2. xfel write loads opensbi.bin to memory address 0x80200000;
  3. xfel exec jumps to that address to start OpenSBI.
tip

D1 and F133 share the same chip ID (0x00185900); the DDR type can be d1 or f133.