Hikey970 Kernel Development Guide
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HiKey970
Kernel Development Guide
Issue 01
Date 2018-03-11
Issue 01 (
2018-03-11
) HiSilicon Proprietary and Confidential
Copyright © HiSilicon Technologies Co., Ltd.
i
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HiKey970
Kernel Development Guide Change History
Issue 01 (2018-03-11) HiSilicon Proprietary and Confidential
Copyright © HiSilicon Technologies Co., Ltd.
i
Change History
Changes between document issues are cumulative. The latest document issue
contains all the changes made in earlier issues.
Issue 01 (2018-03-11)
The first version.
HiKey970
Kernel Development Guide Contents
Issue 01 (2018-03-11) HiSilicon Proprietary and Confidential
Copyright © HiSilicon Technologies Co., Ltd.
ii
Contents
Change History .................................................................................................................................. i
Contents ............................................................................................................................................ ii
1 Compiling the image .................................................................................................................... 1
1.1 Download the code of Hikey970 on GitHub .................................................................................................... 1
1.2 Prepare tools and files ...................................................................................................................................... 1
1.2.1 Create a tools folder ................................................................................................................................ 1
1.2.2 Copy ramdisk.img and mkbootimg to the tools Directory ...................................................................... 1
1.2.3 Modify the compilation script ................................................................................................................. 1
1.3 Compile ............................................................................................................................................................ 2
1.3.1 Run build_kernel.sh ................................................................................................................................ 2
2 Loading the image ......................................................................................................................... 3
2.1 Entering the FastBoot mode ............................................................................................................................. 3
2.2 Load the boot image ......................................................................................................................................... 3
HiKey970
Kernel Development Guide 1 Compiling the image
Issue 01 (2018-03-11) HiSilicon Proprietary and Confidential
Copyright © HiSilicon Technologies Co., Ltd.
1
1
Compiling the image
1.1 Download the code of Hikey970 on GitHub
Git command:
git clone https://github.com/96boards-hikey/linux.git
Note: after the code is downloaded, switch to the hikey970 branch (Branch Name:
origin/hikey970-v4.9).
1.2 Prepare tools and files
1.2.1 Create a tools folder
Create a “tools” folder in the same level directory of the “linux” directory.
./linux/arch
./linux/mm
./linux/kernel
…
./tools/
1.2.2 Copy ramdisk.img and mkbootimg to the tools Directory
Copy the compiled ramdisk.img and mkbootimg into the tools directory.
1.2.3 Modify the compilation script
Move the build_kernel.sh compilation script to the tools folder; Edit the compile script
CROSS_COMPILE parameters to specify the compiler tool according to your own
compilation environment, For example:
export
CROSS_COMPILE=/home/xxxxxx/hikey970/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-
android-4.9/bin/aarch64-linux-android-
HiKey970
Kernel Development Guide 1 Compiling the image
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1.3 Compile
1.3.1 Run build_kernel.sh
Execute "./build_kernel.sh" in the tools directory to compile the image. After the compilation
is completed, the boot.img can be generated under “out/target/product/hikey970”.
HiKey970
Kernel Development Guide 2 Loading the image
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2
Loading the image
2.1 Entering the FastBoot mode
Input in ADB mode: adb reboot bootloader or dial the back of the code switch 3 (EXT_BOOT)
to ON, and press the RESET key to restart.
2.2 Load the boot image
Input in Fastboot mode: fastboot flash boot + "boot image path" starts to load the image, and
then input “fastboot reboot” to normal start.
