[FAQ] PROCESSOR-SDK-AM65X: Steps to build and flash linux sdk image

To build ti-linux-kernel code before flashing, follow the below steps:

1. Download and install  PROCESSOR-SDK-LINUX-RT-AM65X -- Linux -RT processor SDK for AM65x for respective version via link:  https://www.ti.com/tool/PROCESSOR-SDK-AM65X
   
   

   chmod +x ./ti-processor-sdk-linux-[platform]-<version>-Linux-x86-Install.bin
   ./ti-processor-sdk-linux-[platform]-<version>-Linux-x86-Install.bin

   
   
   Refer https://software-dl.ti.com/processor-sdk-linux-rt/esd/AM65X/08_02_00_01/exports/docs/linux/Overview_Getting_Started_Guide.html
   
   
2. Prepare the SD card
   

   cd <path>/ti-processor-sdk-linux-rt-am65xx-evm-"$SDK_VERSION"/bin
   sudo ./mksdboot.sh --sdk <path>/ti-processor-sdk-linux-rt-am65xx-evm-"$SDK_VERSION"/ --device /dev/sd<x>
   sync

   
   
3. If flashing code from ti-linux-kernel and not from default image available, clone from ti-linux-kernel and checkout to required tag
   

   git clone https://git.ti.com/git/ti-linux-kernel/ti-linux-kernel.git
   //checkout to required tag
   git checkout tags/{specify the tag}

   
   
   
4. If editing and building code from ti-linux-kernel, go to the path to downloaded git repository otherwise, go to path of downloaded SDK
   

   //Go to path of downloaded repository
   cd Downloads/ti-linux-kernel
   
   //if building from SDK
   cd <path of SDK>/board-support/linux-rt...
   

   
   
   
5. Build SDK and copy Image and dtb to SD card
   

    //sdk path is the path of the downloaded sdk
   export PATH=<sdk path>/linux-devkit/sysroots/x86_64-arago-linux/usr/bin:$PATH
    
   //Command to clean kernel
   make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu- distclean
    
   //Build defconfig from kernel git repository 
   //for version before 9.0
   ti_config_fragments/defconfig_builder.sh -t ti_sdk_arm64_release || ti_config_fragments/defconfig_builder.sh
   make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu- ti_sdk_arm64_rt_release_defconfig
   
   //for 9.0 or later versions
   make ARCH=arm64 CROSS_COMPILE=$V8_CROSS defconfig ti_arm64_prune.config 
    
   //Build Image
   make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu- Image
    
   //Build device tree binaries
   make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu- dtbs
    
   //Compiling kernel modules
   make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu- modules
    
   //Copying kernal image and device tree binaries to rootfs partition of sd card
   cd <kernel sources dir>
   sudo cp arch/arm64/boot/Image /media/rootfs/boot
   sudo cp arch/arm64/boot/dts/ti/*.dtb /media/rootfs/boot
   sudo cp arch/arm64/boot/dts/ti/*.dtbo /media/rootfs/boot
    
   //Installing kernel modules
   sudo make ARCH=arm64 INSTALL_MOD_PATH=/media/rootfs modules_install

   
   
   
6. Insert SD card in the board and boot
7. Reboot the board