Build_Notice

1. Kernel configuration files
   arch/arm64/configs:
   Nokia 6 (TA-1033/TA-1039/TA-1021/TA-1025): FIH-msm8937-perf_defconfig

2. How to build

  Prerequisites:

    * ramdisk.img - root fs

    * mkbootimg - boot.img generator

    * The ARM cross-compiler
      We recommend getting the CodeSourcery Lite compiler.
      Or, you can also use prebuild executable binary which is included in
      standard Android tree.

  Step 1: Build Kernel (zImage)
    $ cd kernel

    $ export ARCH=arm64

    $ export CROSS_COMPILE=<cross compile path with prefix>
      NOTE: Please set the location and the prefix of the ARM cross-compiler.
	        Please use the absolute path for this.
	  ex) <cross compiler path>/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android-

    $ make FIH-msm8937-perf_defconfig O=<output path>
      NOTE: Please set a configuration file you want to build.

    $ make O=<output path>

    You can see arch/arm64/boot/Image.gz-dtb if you succeed in building the kernel.

  Step 2: Assembling the boot.img
    (In the output directory)

 $ mkbootimg --kernel <output path>/arch/arm64/boot/Image.gz-dtb --ramdisk ramdisk.img --base 0x80000000 --pagesize 2048 \
   --cmdline "console=ttyHSL0,115200,n8 androidboot.console=ttyHSL0 androidboot.hardware=qcom msm_rtb.filter=0x237 \
   ehci-hcd.park=3 lpm_levels.sleep_disabled=1 androidboot.bootdevice=7824900.sdhci earlycon=msm_hsl_uart,0x78B0000" \
   --output boot.img