[FAQ] 66AK2E05: How to boot Linux on K2E using NFS from the package "PROCESSOR-SDK-LINUX-K2E" ?

Pre-requisite 

1. Linux-PC with Ubuntu 18.04 LTS
2. Download " PROCESSOR-SDK-LINUX-K2E — Linux Processor SDK for K2E " from https://www.ti.com/tool/PROCESSOR-SDK-K2E
3. Rebuild the u-boot by following this FAQ : https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1106109/faq-66ak2e05-how-to-build-u-boot-for-k2e-from-the-package-processor-sdk-linux-k2e
4. Flash and boot the u-boot from SPI by following this FAQ : https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1106187/faq-66ak2e05-how-to-flash-the-u-boot-into-spi-of-k2e-using-processor-sdk-linux-k2e
5. Build the Linux : https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1107923/faq-66ak2e05-how-to-build-linux-for-k2e-from-the-package-processor-sdk-linux-k2e

STEPS

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How to boot Linux on K2E using PROCESSOR-SDK-LINUX-K2E
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DIP SWITCH Settings

SW1 : 0 0 1 0

( This will boot the u-boot in SPI flash )

Power oN reset

1. Press "Enter" when u-boot runs... when prompted for "Hit any key to stop autoboot" to get the u-boot prompt.

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2. host/server network configuration - Set the ip address manually.
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shankari@shankari-Latitude-E7470:~/ti-processor-sdk-linux-k2e-evm-06.03.00.106/board-support/linux-4.19.94+gitAUTOINC+be5389fd85-gbe5389fd85$ ifconfig

enp0s31f6: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether d4:81:d7:d1:60:e8  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 136  bytes 25658 (25.6 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 16  memory 0xe1200000-e1220000  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 4450  bytes 303900 (303.9 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 4450  bytes 303900 (303.9 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.43.191  netmask 255.255.255.0  broadcast 192.168.43.255
        inet6 2401:4900:25ee:4e4:f042:bcd8:59e2:22ef  prefixlen 64  scopeid 0x0<global>
        inet6 2401:4900:25ee:4e4:d77:bf2e:aded:87af  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::491f:2f81:870:f42a  prefixlen 64  scopeid 0x20<link>
        ether 14:ab:c5:a1:2a:70  txqueuelen 1000  (Ethernet)
        RX packets 633979  bytes 838345136 (838.3 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 191510  bytes 23601148 (23.6 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

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No Ip address is set above, so pls set manually like below.

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sudo ifconfig enp0s31f6 10.100.1.10 up

ifconfig

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2. From device-terminal

ping 10.100.1.10


cd ti-processor-sdk-linux-k2e-evm-06.03.00.106/board-support/prebuilt-images

cp -rf skern-k2e.bin /tftpboot/skern-k2e-shankJuneTenth.bin
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cd ti-processor-sdk-linux-k2e-evm-06.03.00.106/board-support/linux-4.19.94+gitAUTOINC+be5389fd85-gbe5389fd85

cp -rf ./arch/arm/boot/dts/keystone-k2e-evm.dtb /tftpboot/keystone-k2e-evm-shankJuneTenth.dtb
cp -rf  ./arch/arm/boot/zImage /tftpboot/zImage-shankJuneTenth
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3. For the safer side,

    cd /tftpboot
ls -al /tftpboot

chmod 777 zImage-shankJuneTenth keystone-k2e-evm-shankJuneTenth.dtb skern-k2e-shankJuneTenth.bin

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Rootfs on NFS:
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setenv bootcmd 'tftpboot 0x82000000 zImage-shankJuneTenth;tftpboot 0x87000000 skern-k2e-shankJuneTenth.bin;mon_install 0x87000000;tftpboot 0x87000000 keystone-k2e-evm-shankJuneTenth.dtb;bootz 0x82000000 - 0x87000000'

Use when board to server connects on network using 1:1
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Use when down port is used (tested)
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setenv bootargs 'earlyprintk debug console=ttyS0,115200n8 ip=10.100.1.11:::::eth0:off rootwait=1 root=/dev/nfs nfsroot=10.100.1.10:/home/shankari/ti-processor-sdk-linux-k2e-evm-06.03.00.106/targetNFS,v3,tcp rw'

boot

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The same steps are followed in the video for ease of use.

Regards

Shankari G