there is no in my tx2 this directory --> Linux_for_Tegra/bootloader/

I compiler file SPE fw but I couldnt’ find anywhere Linux_for_Tegra/bootloader/ this directory. I want flash my compiled file but there is no it on my tx2 device.

How could Linux_for_Tegra/bootloader/ be created ?

I just want to following command. But there is no anywhere ./flash.sh or Linux_for_Tegra/bootloader/ directory

# FLASH

1. Back up the original copies of `spe.bin` and `spe_t194.bin` located in the
following directory:

    Linux_for_Tegra/bootloader/

2. Copy the generated `${OUTDIR}/spe.bin` to the following locating, depending on your target.
   - For Jetson TX2, copy it to:

         Linux_for_Tegra/bootloader/spe.bin
   - For the Jetson AGX target, copy it to:

         Linux_for_Tegra/bootloader/spe_t194.bin

   The `Linux_for_Tegra` directory is part of the extracted L4T build that
   you used to flash the Jetson device.
3. Use the command below to just flash this firmware for Cortex-R5 partition:

       sudo ./flash.sh -k spe-fw jetson-<tx2 or xavier> mmcblk0p1

I would be grateful if you could help me.
Thanks

Duplicate post. See:
https://devtalk.nvidia.com/default/topic/1061821/jetson-tx2/i-compiled-spe-firmware-source-code-but-how-to-flash-in-jetson-tx2-/