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Tool/software:
UFS is present on the J784S4EVM. How can one use it instead of eMMC to host rootfs and use that to boot to Linux command prompt.
Hi,
Steps below:
root@j721e-evm:~# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.37.4).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
The device contains 'ext4' signature and it will be removed by a write command. See fdisk(8) man page and --wipe option for more details.
Device does not contain a recognized partition table.
Created a new DOS disklabel with disk identifier 0x511d1827.
Command (m for help): m
Help:
DOS (MBR)
a toggle a bootable flag
b edit nested BSD disklabel
c toggle the dos compatibility flag
Generic
d delete a partition
F list free unpartitioned space
l list known partition types
n add a new partition
p print the partition table
t change a partition type
v verify the partition table
i print information about a partition
Misc
m print this menu
u change display/entry units
x extra functionality (experts only)
Script
I load disk layout from sfdisk script file
O dump disk layout to sfdisk script file
Save & Exit
w write table to disk and exit
q quit without saving changes
Create a new label
g create a new empty GPT partition table
G create a new empty SGI (IRIX) partition table
o create a new empty DOS partition table
s create a new empty Sun partition table
Command (m for help): p
Disk /dev/sdb: 29.79 GiB, 31981568000 bytes, 7808000 sectors
Disk model: THGAF8G8T23BAILB
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 65536 bytes / 65536 bytes
Disklabel type: dos
Disk identifier: 0x511d1827
Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1):
First sector (256-7807999, default 256): [ 45.123255] kauditd_printk_skb: 3 callbacks suppressed
[ 45.123262] audit: type=1334 audit(1715059470.964:17): prog-id=12 op=UNLOAD
[ 45.135361] audit: type=1334 audit(1715059470.964:18): prog-id=11 op=UNLOAD
[ 45.593936] systemd-journald[165]: Time jumped backwards, rotating.
Last sector, +/-sectors or +/-size{K,M,G,T,P} (256-7807999, default 7807999):
Created a new partition 1 of type 'Linux' and of size 29.8 GiB.
Command (m for help): p^H^H^H
Disk /dev/sdb: 29.79 GiB, 31981568000 bytes, 7808000 sectors
Disk model: THGAF8G8T23BAILB
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 65536 bytes / 65536 bytes
Disklabel type: dos
Disk identifier: 0x511d1827
Device Boot Start End Sectors Size Id Type
/dev/sdb1 256 7807999 7807744 29.8G 83 Linux
Command (m for help): m
Help:
DOS (MBR)
a toggle a bootable flag
b edit nested BSD disklabel
c toggle the dos compatibility flag
Generic
d delete a partition
F list free unpartitioned space
l list known partition types
n add a new partition
p print the partition table
t change a partition type
v verify the partition table
i print information about a partition
Misc
m print this menu
u change display/entry units
x extra functionality (experts only)
Script
I load disk layout from sfdisk script file
O dump disk layout to sfdisk script file
Save & Exit
w write table to disk and exit
q quit without saving changes
Create a new label
g create a new empty GPT partition table
G create a new empty SGI (IRIX) partition table
o create a new empty DOS partition table
s create a new empty Sun partition table
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
[ 55.711671] sdb: sdb1
Syncing disks.
root@j721e-evm:~# lsblk -l
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 32M 0 disk
sda1 8:1 0 31M 0 part
sdb 8:16 0 29.8G 0 disk
sdb1 8:17 0 29.8G 0 part
mtdblock0 31:0 0 512K 0 disk
mtdblock1 31:1 0 2M 0 disk
mtdblock2 31:2 0 4M 0 disk
mtdblock3 31:3 0 128K 0 disk
mtdblock4 31:4 0 128K 0 disk
mtdblock5 31:5 0 1M 0 disk
mtdblock6 31:6 0 55.8M 0 disk
mtdblock7 31:7 0 128K 0 disk
mtdblock8 31:8 0 512K 0 disk
mtdblock9 31:9 0 2M 0 disk
mtdblock10 31:10 0 4M 0 disk
mtdblock11 31:11 0 128K 0 disk
mtdblock12 31:12 0 128K 0 disk
mtdblock13 31:13 0 1M 0 disk
mtdblock14 31:14 0 55.8M 0 disk
mtdblock15 31:15 0 128K 0 disk
mmcblk0 179:0 0 14.8G 0 disk
mmcblk0p1 179:1 0 14.8G 0 part
mmcblk0boot0 179:32 0 31.5M 1 disk
mmcblk0boot1 179:64 0 31.5M 1 disk
mmcblk1 179:96 0 14.8G 0 disk
mmcblk1p1 179:97 0 128M 0 part /boot
mmcblk1p2 179:98 0 7.4G 0 part /
root@j721e-evm:~# sudo mkfs -t ext4 /dev/sdb1
mke2fs 1.46.5 (30-Dec-2021)
Creating filesystem with 7807744 4k blocks and 1954064 inodes
Filesystem UUID: e1bac28e-f771-40a4-b06e-71f93217ad3e
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
root@j721e-evm:~# sudo mkfs -t vfat /dev/sda1
mkfs.fat 4.2 (2021-01-31)
root@j721e-evm:~# lsblk -f
NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINTS
sda
`-sda1 vfat BCF8-546B
sdb
`-sdb1 ext4 e1bac28e-f771-40a4-b06e-71f93217ad3e 27.6G 0% /run/media/sdb1 diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig index c59d34af1..8f613d311 100644 --- a/arch/arm64/configs/defconfig +++ b/arch/arm64/configs/defconfig CONFIG_SCSI_UFS_QCOM=m CONFIG_SCSI_UFS_HISI=y CONFIG_SCSI_UFS_RENESAS=m -CONFIG_SCSI_UFS_TI_J721E=m +CONFIG_SCSI_UFS_TI_J721E=y
mkdir /mnt/ufs mkdir /mnt/sd cp -r /mnt/sd/* /mnt/ufs sync umount /mnt/*
setenv bootargs console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02880000 root=/dev/sdb1 rootwait setenv bootcmd "ufs init; scsi scan; ext4load scsi 1 0x82000000 boot/Image; ext4load scsi 1 0x81200000 boot/dtb/ti/k3-j784s4-evm.dtb; booti 0x82000000 - 0x81200000" boot