本文基于 Ubuntu 20.04.4 LTS

1、環(huán)境準(zhǔn)備

這個(gè)沒啥好說的，都是搞機(jī)的，用之前編譯 aosp 的 linux 環(huán)境就行，有小伙伴擔(dān)心會(huì)把之前的環(huán)境搞崩，

也有用 docker 編譯的，我這里就直接在 aosp 環(huán)境下搞了，還省事。

安裝下面這三東西，是為了下載 Harmony 源碼

sudo apt install curl
sudo apt install python3-pip
sudo apt install git-lfs

安裝下面這五個(gè)東西，是為了解決編譯到最后報(bào)錯(cuò)(頭鐵不信的，你可以試試，等最后再安裝)

sudo apt install default-jdk
sudo apt install mtd-utils
sudo apt install scons
sudo apt install gcc-arm-none-eabi
sudo apt install gcc-arm-linux-gnueabi

2、安裝 repo

務(wù)必按照此步驟安裝repo。ubuntu默認(rèn)提供的repo每次啟動(dòng)都會(huì)訪問googlge服務(wù)器，會(huì)被墻。
此外20.04下需要root身份執(zhí)行–否則提示沒權(quán)限。
curl https://gitee.com/oschina/repo/raw/fork_flow/repo-py3 > /usr/local/bin/repo
chmod a+x /usr/local/bin/repo
pip3 install -i https://repo.huaweicloud.com/repository/pypi/simple requests

3、下載源碼

[官網(wǎng)版本更新說明}(https://gitee.com/openharmony/docs/tree/master/zh-cn/release-notes)

目前最新為 4.0 版本，內(nèi)核基于 5.10，老版本 2.x 1.x 已經(jīng)停止維護(hù)，內(nèi)核基于 4.19

參考官網(wǎng)下載方式

repo init -u https://gitee.com/openharmony/manifest -b OpenHarmony-4.0-Release --no-repo-verify
repo sync -c
repo forall -c ‘git lfs pull’

注意那個(gè) 4.0 之前沒有 v，以前的版本是有這個(gè) v 的，不然會(huì)初始化失敗，還有就是注意檢查電腦是否斷網(wǎng)了

4、下載編譯依賴工具包

源碼下載完成后，進(jìn)入根目錄執(zhí)行 bash build/prebuilts_download.sh

看你網(wǎng)速快慢，我這大概20分鐘，下載完成后會(huì)多出 openharmony_prebuilts 文件夾

5、編譯源碼

./build.sh --product-name rk3568 --ccache

第一次編譯前面階段 2W 多個(gè)文件，后面階段 6W 多個(gè)文件，整體時(shí)間看你電腦性能。

編譯中間要是出錯(cuò)看提示就行，少啥就自行安裝，比如這種

default-jdk is not installed. please install it.
mtd-utils is not installed. please install it.
scons is not installed. please install it.
gcc-arm-none-eabi is not installed. please install it.
gcc-arm-linux-gnueabi is not installed. please install it.
Missing dependencies, please check!
[OHOS INFO] Set cache size limit to 100.0 GB
[OHOS INFO] generated build prop info to /hom

6、燒寫固件(勸你先別燒寫)

最終固件路徑 out\rk3568\packages\phone\images\

里面文件和普通 rk3568 aosp 項(xiàng)目大差不差，所以燒寫方式也是一樣的。

打開 rk 燒寫工具，選擇加載配置，選擇 images 里的 config.cfg，把對(duì)應(yīng)的 image

都重新選擇替換就行。想要看圖的可以去參考這個(gè)OpenHarmony 入門

7、內(nèi)核及驅(qū)動(dòng)移植

沒有任何修改編譯后的固件肯定是無法在板子上跑起來的，我這里修改了很長(zhǎng)時(shí)間也沒有搞定，這里記錄一下一些心得。

主要原因就是內(nèi)核版本差異太大，無法平行移植，有些小伙伴直接整個(gè) kernel 替換了就成功跑起來了。

3568 有些版本的內(nèi)核用的是 4.19(我這里就是),而最新的 harmony 都是基于 5.10 了

harmony 內(nèi)核源碼修改路徑 out\kernel\src_tmp\linux-5.10

你要是內(nèi)核版本一致就可以直接替換所有文件，然后稍微修改一下如下編譯規(guī)則文件

out\kernel\src_tmp\linux-5.10\make-ohos.sh

替換原有 TOYBRICK_DTB 為你自己的，比如 MY3568_DTB, 總共 4 處修改

#!/bin/bash

set -e

SCRIPTPATH=$(dirname $realpath "$0")
export PATH=$(realpath $SCRIPTPATH/../../../../)/prebuilts/clang/ohos/linux-x86_64/llvm/bin/:$(realpath $SCRIPTPATH/../../../../)/prebuilts/develop_tools/pahole/bin/:$PATH
export PRODUCT_PATH=vendor/hihope/rk3568
IMAGE_SIZE=64  # 64M
IMAGE_BLOCKS=4096
ENABLE_LTO_O0=${3}

CPUs=`sed -n "N;/processor/p" /proc/cpuinfo|wc -l`
MAKE="make LLVM=1 LLVM_IAS=1 CROSS_COMPILE=aarch64-linux-gnu-"
[ "${ENABLE_LTO_O0}" == "enable_lto_O0" ] && MAKE="${MAKE} KCFLAGS=-Wl,--lto-O0"
BUILD_PATH=boot_linux
EXTLINUX_PATH=${BUILD_PATH}/extlinux
EXTLINUX_CONF=${EXTLINUX_PATH}/extlinux.conf
# TOYBRICK_DTB=toybrick.dtb
MY3568_DTB=rk3568-evb1-ddr4-v10.dtb
if [ ${KBUILD_OUTPUT} ]; then
	OBJ_PATH=${KBUILD_OUTPUT}/
fi

ID_MODEL=1
ID_ARCH=2
ID_UART=3
ID_DTB=4
ID_IMAGE=5
ID_CONF=6
model_list=(
	"TB-RK3568X0   arm64 0xfe660000 rk3568-toybrick-x0-linux  Image rockchip_linux_defconfig"
	"TB-RK3568X10  arm64 0xfe660000 rk3568-toybrick-x10-linux Image rockchip_linux_defconfig"
	"MYBOARD3568   arm64 0xfe660000 rk3568-evb1-ddr4-v10 Image rockchip_linux_defconfig"
)


function help()
{
	echo "Usage: ./make-ohos.sh {BOARD_NAME}"
	echo "e.g."
	for i in "${model_list[@]}"; do
		echo "  ./make-ohos.sh $(echo $i | awk '{print $1}')"
	done
}


function make_extlinux_conf()
{
	dtb_path=$1
	uart=$2
	image=$3
	
	echo "label rockchip-kernel-5.10" > ${EXTLINUX_CONF}
	echo "	kernel /extlinux/${image}" >> ${EXTLINUX_CONF}
	# echo "	fdt /extlinux/${TOYBRICK_DTB}" >> ${EXTLINUX_CONF}
	echo "	fdt /extlinux/${MY3568_DTB}" >> ${EXTLINUX_CONF}
	cmdline="append earlycon=uart8250,mmio32,${uart} root=PARTUUID=614e0000-0000-4b53-8000-1d28000054a9 rw rootwait rootfstype=ext4"
	echo "  ${cmdline}" >> ${EXTLINUX_CONF}
}

function make_kernel_image()
{
	arch=$1
	conf=$2
	dtb=$3
	
	if [ "$GPUDRIVER" == "mesa3d" ]; then 
		config_base="arch/${arch}/configs/${conf}"
		config_frag="../../../../device/soc/rockchip/panfrost.config"
		ARCH=${arch} ./scripts/kconfig/merge_config.sh ${config_base} ${config_frag}
	else
		${MAKE} ARCH=${arch} ${conf}
	fi

	if [ $? -ne 0 ]; then
		echo "FAIL: ${MAKE} ARCH=${arch} ${conf}"
		return -1
	fi

	${MAKE} ARCH=${arch} ${dtb}.img -j${CPUs}
	if [ $? -ne 0 ]; then
		echo "FAIL: ${MAKE} ARCH=${arch} ${dtb}.img"
		return -2
	fi

	return 0
}

function make_ext2_image()
{
	blocks=${IMAGE_BLOCKS}
	block_size=$((${IMAGE_SIZE} * 1024 * 1024 / ${blocks}))

	if [ "`uname -m`" == "aarch64" ]; then
		echo y | sudo mke2fs -b ${block_size} -d boot_linux -i 8192 -t ext2 boot_linux.img ${blocks}
	else
		genext2fs -B ${blocks} -b ${block_size} -d boot_linux -i 8192 -U boot_linux.img
	fi

	return $?
}

function make_boot_linux()
{
	arch=${!ID_ARCH}
	uart=${!ID_UART}
	dtb=${!ID_DTB}
	image=${!ID_IMAGE}
	conf=${!ID_CONF}
	if [ ${arch} == "arm" ]; then
		dtb_path=arch/arm/boot/dts
	else
		dtb_path=arch/arm64/boot/dts/rockchip
	fi

	rm -rf ${BUILD_PATH}
	mkdir -p ${EXTLINUX_PATH}

	make_kernel_image ${arch} ${conf} ${dtb}
	if [ $? -ne 0 ]; then
		exit 1
	fi
	make_extlinux_conf ${dtb_path} ${uart} ${image}
	cp -f ${OBJ_PATH}arch/${arch}/boot/${image} ${EXTLINUX_PATH}/
	# cp -f ${OBJ_PATH}${dtb_path}/${dtb}.dtb ${EXTLINUX_PATH}/${TOYBRICK_DTB}
	cp -f ${OBJ_PATH}${dtb_path}/${dtb}.dtb ${EXTLINUX_PATH}/${MY3568_DTB}
	cp -f logo*.bmp ${BUILD_PATH}/
	if [ "enable_ramdisk" != "${ramdisk_flag}" ]; then
		make_ext2_image
	fi
}

ramdisk_flag=$2
found=0
for i in "${model_list[@]}"; do
	if [ "$(echo $i | awk '{print $1}')" == "$1" ]; then
		make_boot_linux $i
		found=1
	fi
done

device\board\hihope\rk3568\kernel\build_kernel.sh

修改內(nèi)核編譯指定使用剛剛的 MYBOARD3568，替換原來 TB-RK3568X0

# eval $MAKE_OHOS_ENV ./make-ohos.sh TB-RK3568X0 $RAMDISK_ARG ${ENABLE_LTO_O0}
eval $MAKE_OHOS_ENV ./make-ohos.sh MYBOARD3568 $RAMDISK_ARG ${ENABLE_LTO_O0}

再次執(zhí)行 ./build.sh --product-name rk3568 --ccache 重新編譯

8、編譯錯(cuò)誤舉例

錯(cuò)誤1、內(nèi)核版本差異，dts 文件屬性不兼容，出現(xiàn)在 rk3568-dram-default-timing.dtsi 中 260 行，去修改注釋即可

[OHOS ERROR] DTC arch/arm64/boot/dts/rockchip/rk3568-evb1-ddr4-v10.dtb
[OHOS ERROR] Error: /home/ubuntu/code/OpenHarmony4.0/out/kernel/src_tmp/linux-5.10/arch/arm64/boot/dts/rockchip/rk3568-dram-default-timing.dtsi:260.27-28 syntax error
[OHOS ERROR] FATAL ERROR: Unable to parse input tree
[OHOS ERROR] make[3]: *** [scripts/Makefile.lib:329: arch/arm64/boot/dts/rockchip/rk3568-evb1-ddr4-v10.dtb] Error 1
[OHOS ERROR] make[2]: *** [/home/ubuntu/code/OpenHarmony4.0/out/kernel/src_tmp/linux-5.10/Makefile:1405: rockchip/rk3568-evb1-ddr4-v10.dtb] Error 2
[OHOS ERROR] make[2]: *** Waiting for unfinished jobs…
[OHOS ERROR] make[1]: *** [arch/arm64/Makefile:208: rk3568-evb1-ddr4-v10.img] Error 2
[OHOS ERROR] make[1]: Leaving directory ‘/home/ubuntu/code/OpenHarmony4.0/out/kernel/OBJ/linux-5.10’
[OHOS ERROR] make: *** [Makefile:185: __sub-make] Error 2

錯(cuò)誤2、修改的配置文件有問題

[OHOS ERROR] FAILED: …/kernel/src_tmp/linux-5.10/boot_linux …/kernel/checkpoint/compile_check
[OHOS ERROR] /usr/bin/env …/…/device/board/hihope/rk3568/kernel/build_kernel.sh …/…/kernel/linux/linux-5.10 /home/ubuntu/code/OpenHarmony4.0/out/rk3568/packages/phone/images /home/ubuntu/code/OpenHarmony4.0/device/board/hihope/rk3568 vendor/hihope/rk3568 /home/ubuntu/code/OpenHarmony4.0 rockchip rk3568 hihope root default disable_lto_O0

9、開機(jī) logo 替換

device\board\hihope\rk3568\kernel\logo.bmp

device\board\hihope\rk3568\kernel\logo_kernel.bmp

10、一些常見路徑

applications\standard 系統(tǒng)核心應(yīng)用，包括日歷、電話、相機(jī)、聯(lián)系人、Setting、SystemUI 等

out\kernel\src_tmp\linux-5.10 最終編譯內(nèi)核源碼路徑

out\kernel\OBJ\linux-5.10 內(nèi)核源碼編譯 obj 路徑

kernel\linux\linux-5.10 SDK自帶原生 kernel 路徑

device\board\hihope\rk3568 編譯腳本路徑

openharmony kernel 代碼構(gòu)成如下：

①、SDK 自帶原生 kernel（kernel\linux\linux-5.10\）

②、openharmony HDF驅(qū)動(dòng)補(bǔ)丁包 hdf.patch（kernel\linux\patches\linux-5.10\rk3568_patch\）

③、方案商需求的內(nèi)核補(bǔ)丁包 kernel.patch（kernel\linux\patches\linux-5.10\rk3568_patch\）

由1中kernel加上2、3中的patch，組合成最終的kernel代碼（out\kernel\src_tmp\linux-5.10）

該工作由 device\board\hihope\rk3568\kernel\build_kernel.sh完成

腳本每次執(zhí)行會(huì)時(shí)開頭都會(huì)刪除 out\kernel\src_tmp\linux-5.10 目錄，重新組合生成。文章來源地址http://www.zghlxwxcb.cn/news/detail-751879.html

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