Under construction…

X-Boot is the first-stage boot loader. It is loaded into internal SRAM and run by internal ROM code of SP7350. Note that before X-Boot initializes and trains DRAM controller, DRAM is not available.

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1. Output log at UART0 (at 115,200 bps).

2. Support accessing OTP using Sunplus OTPTool via UART0.

3. Support loading firmware of LPDDR4/DDR4/DDR3 from boot devices.

4. Support 1D and 2D training of LPDDR4, DDR4 and DDR3 SDRAM.

5. Support loading image of TF-A (BL31), OP-TEE (BL32) and U-Boot (BL33) from boot devices.

6. Support secure-boot:

   1. Verify digital signature of fip (TF-A and OP-TEE) and U-Boot images.

   2. Decrypt fip image.

7. Support warm-boot.

8. Switch CA55 to 64-bit mode and jump to run TF-A.

Image Added

Drivers locations and features

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