Hi, I'm using SoM system for my baremetal project now. Here is the image of this board: It has an eMMC flash as a boot option. I don't know what is the boot flow for this device. So I assume boot form eMMC is kind of boot form SD/MMC card using cycloneVsoc dev kit. In order to that I'm tyrying to use SPL,since preloader is no longer supportted. what I did: 1. compile the axf file and then compile the bin file using fromelf(ARMCC tool chain) 2. compile the sof system file using Quartus Prime 22.1std 3. compile the SPL file using Uboot and cycloneVsoc defconfig to get u-boot-spl. 4. made an image from rocketboards.org for the SD card. I read the AN709 file: baremetal for SD card. I think what I need to do next is: Using mkimage to add a load point and an entry address. In baremetal example helloworld, you used order like:     $(MKIMAGE) -A arm -T standalone -C none -a 0x100040 -e 0 -n "baremetal image" -d $(BIN) $(IMG) However, what's next? About SPL: There is a notice "Note: spl.boot.SDMMC_NEXT_BOOT_IMAGE = 0x40000. " on AN709. Do I need to change the spl boot image address as well? What's the meaning of this address 0x40000? About mkimage: Could you explane how can I get the correct -a and -e address? What are these addresss retaled to? sdcard address, next_boot_image address, scat address,etc. Could you give me an example? About SD card: For baremetal system What's the correct design flow next? Which file do I need to which loacation? Thank you for your help. ref: * Building Bootloader for Cyclone V and Arria 10 SoC * 1.5.2. Booting from SD/MMC – Custom Partition (intel.com) * MCV - Intel PSG Cyclone FPGA System on Module connecting the different Worlds of FPGA and CPU | ARIES Embedded GmbH (aries-embedded.com) Yours Alex

The Advanced SIMD extension (aka NEON or "MPE" Media Processing Engine) is a combined 64- and 128-bit single instruction multiple data (SIMD) instruction