root@k1:~# blkid /dev/mmcblk0*
/dev/mmcblk0: PTUUID="18f14745-a350-471c-ac61-002f41995048" PTTYPE="gpt"
/dev/mmcblk0p1: PARTLABEL="fsbl" PARTUUID="f5e0cc4c-7768-402f-a4cd-7b3ad29c6ac4"
/dev/mmcblk0p2: PARTLABEL="env" PARTUUID="774a1d6a-8fe6-4283-a283-fe4ab6cff0bb"
/dev/mmcblk0p3: PARTLABEL="opensbi" PARTUUID="4ced75b2-e0d4-4ca4-aef3-1f0d4785818b"
/dev/mmcblk0p4: PARTLABEL="uboot" PARTUUID="83f7e27b-0094-4932-8989-b94e75e2226d"
/dev/mmcblk0p5: LABEL_FATBOOT="EFI" LABEL="EFI" UUID="FBEB-9284" BLOCK_SIZE="512" TYPE="vfat" PARTLABEL="bootfs" PARTUUID="c5d82940-7510-451d-b35f-a8c45db5d330"
/dev/mmcblk0p6: LABEL="rootfs" UUID="9ec6d922-54c3-4236-bce1-3676829642f3" BLOCK_SIZE="4096" TYPE="ext4" PARTLABEL="rootfs" PARTUUID="38fba5ad-85c6-4770-ae63-685c278a2be0"
root@k1:~# find /efi
/efi
/efi/EFI
/efi/EFI/BOOT
/efi/EFI/BOOT/BOOTRISCV64.EFI
/efi/EFI/systemd
/efi/EFI/systemd/systemd-bootriscv64.efi
/efi/EFI/Linux
/efi/spacemit
/efi/spacemit/6.1.15
/efi/spacemit/6.1.15/k1-x_MINI-PC.dtb
/efi/spacemit/6.1.15/k1-x_MUSE-Book.dtb
/efi/spacemit/6.1.15/k1-x_MUSE-Card.dtb
/efi/spacemit/6.1.15/k1-x_MUSE-N1.dtb
/efi/spacemit/6.1.15/k1-x_MUSE-Paper-mini-4g.dtb
/efi/spacemit/6.1.15/k1-x_MUSE-Paper.dtb
/efi/spacemit/6.1.15/k1-x_MUSE-Pi.dtb
/efi/spacemit/6.1.15/k1-x_deb1.dtb
/efi/spacemit/6.1.15/k1-x_deb2.dtb
/efi/spacemit/6.1.15/k1-x_evb.dtb
/efi/spacemit/6.1.15/k1-x_hs450.dtb
/efi/spacemit/6.1.15/k1-x_kx312.dtb
/efi/spacemit/6.1.15/k1-x_lpi3a.dtb
/efi/spacemit/6.1.15/k1-x_milkv-jupiter.dtb
/efi/spacemit/6.1.15/k1-x_mingo.dtb
/efi/spacemit/6.1.15/m1-x_milkv-jupiter.dtb
/efi/env_k1-x.txt
/efi/vmlinuz-6.1.15
/efi/initrd.img-6.1.15
/efi/bianbu.bmp
/efi/loader
/efi/loader/entries
/efi/loader/entries/52fb8b1ab4ed49b3a883304f80ababc2-6.1.15.conf
/efi/loader/entries.srel
/efi/loader/loader.conf
/efi/loader/random-seed
/efi/52fb8b1ab4ed49b3a883304f80ababc2
/efi/vmlinuz-6.1.15.efi
root@k1:~# cat /efi/env_k1-x.txt 
bootdelay=1
bootcmd=fatload mmc 0:5 $loadaddr /EFI/BOOT/BOOTRISCV64.EFI; bootefi $loadaddr
root@k1:~# cat /efi/loader/entries/52fb8b1ab4ed49b3a883304f80ababc2-6.1.15.conf 
title      Bianbu 1.0.15
version    6.1.15
sort-key   bianbu
options    earlycon=sbi earlyprintk quiet splash console=ttyS0,115200 loglevel=8 clk_ignore_unused swiotlb=65536 rdinit=/init product_name=k1-x_deb1 plymouth.ignore-serial-consoles plymouth.prefer-fbcon workqueue.default_affinity_scope=system root=/dev/mmcblk0p6 rootwait rootfstype=ext4
linux      /vmlinuz-6.1.15.efi
initrd     /initrd.img-6.1.15
devicetree /spacemit/6.1.15/k1-x_deb1.dtb