编译并制作NXP S32G274ARDB2开发板启动镜像

所执行命令的运行环境为Ubuntu18.04

一、基于Yocto编译Linux BSP

1）安装repo工具

mkdir ~/bin
curl https://mirrors.tuna.tsinghua.edu.cn/git/git-repo -o repo
chmod a+x ~/bin/repo
PATH=${PATH}:~/bin

2）配置自己的Git环境变量

git config --global user.email "you@example.com"
git config --global user.name "Your Name"
 

3）下载Yocto开发环境

mkdir fsl-auto-yocto-bsp
cd fsl-auto-yocto-bsp
python3 /home/djnakata/bin/repo init -u https://source.codeaurora.org/external/autobsps32/auto_yocto_bsp -b release/bsp30.0 --repo-url='https://mirrors.tuna.tsinghua.edu.cn/git/git-repo/'

python3 /home/djnakata/bin/repo sync

下载完Yocto开发环境之后，接着进行编译

4）编译

• 建立Yocto编译环境(只需要第一次执行）

       ./sources/meta-alb/scripts/host-prepare.sh

• 创建编译目录并指定所需要运行的平台

       source nxp-setup-alb.sh -m s32g274ardb2

•  启动bitbake编译命令    

       bitbake fsl-image-base

    编译完毕之后，所需的目标文件存放在build_s32g274ardb2/tmp/deploy/images/s32g274ardb2下面

二、单独编译U-Boot (非Yocto，需要单独下载arm build toolchains）

1) 下载源代码

git clone https://source.codeaurora.org/external/autobsps32/u-boot
cd u-boot
git checkout -b bsp30.0-2020.04 bsp30.0-2020.04

2）编译

make CROSS_COMPILE=/path/to/your/toolchain/dir/bin/aarch64-none-linux-gnu-  s32g274ardb2
_defconfig

make CROSS_COMPILE=/path/to/your/toolchain/dir/bin/aarch64-none-linux-gnu-

三、单独编译Linux Kernel(非Yocto，需要单独下载arm build toolchains)

1) 下载源代码

git clone https://source.codeaurora.org/external/autobsps32/linux
cd linux

git checkout -b bsp30.0-5.10.41-rt bsp30.0-5.10.41-rt

2）编译

make ARCH=arm64 CROSS_COMPILE=/path/to/your/toolchain/dir/bin/aarch64-none-linux-gnu- s32gen1_defconfig

make ARCH=arm64 CROSS_COMPILE=/path/to/your/toolchain/dir/bin/aarch64-none-linux-gnu-

编译好的image位于arch/arm64/boot目录下面，dtb文件位于arch/arm64/boot/dts/freescale目录下面

四、制作Boot镜像

1. SD卡方式

1) 如果是从Yocto进行编译，编译完成的image文件fsl-image-base-s32g274ardb2.sdcard位于build_s32g274ardb2/tmp/deploy/images/s32g274ardb2

然后使用dd命令进行burn up

sudo dd if=./fsl-image-base-s32g274ardb2.sdcard of=/dev/sdd bs=1M && sync

2) 如果想手动进行拷贝，需执行如下操作：

• SD卡将分为两个分区：一个用于放置kernel与DTB文件；一个用于放置根文件系统, 如下：

sudo fdisk /dev/sdd

Welcome to fdisk (util-linux 2.31.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Command (m for help): p
Disk /dev/sdd: 14.5 GiB, 15552479232 bytes, 30375936 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x1a3401e2

Command (m for help): n
Partition type
   p   primary (0 primary, 0 extended, 4 free)
   e   extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-30375935, default 2048): 8192
Last sector, +sectors or +size{K,M,G,T,P} (8192-30375935, default 30375935): +255M

Created a new partition 1 of type 'Linux' and of size 255 MiB.

Command (m for help): p
Disk /dev/sdd: 14.5 GiB, 15552479232 bytes, 30375936 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x1a3401e2

Device     Boot Start    End Sectors  Size Id Type
/dev/sdd1        8192 530431  522240  255M 83 Linux

Command (m for help): n
Partition type
   p   primary (1 primary, 0 extended, 3 free)
   e   extended (container for logical partitions)
Select (default p): p
Partition number (2-4, default 2): 2
First sector (2048-30375935, default 2048): 530432   
Last sector, +sectors or +size{K,M,G,T,P} (530432-30375935, default 30375935): 

Created a new partition 2 of type 'Linux' and of size 14.2 GiB.

Command (m for help): p
Disk /dev/sdd: 14.5 GiB, 15552479232 bytes, 30375936 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x1a3401e2

Device     Boot  Start      End  Sectors  Size Id Type
/dev/sdd1         8192   530431   522240  255M 83 Linux
/dev/sdd2       530432 30375935 29845504 14.2G 83 Linux

Command (m for help): t
Partition number (1,2, default 2): 1
Hex code (type L to list all codes): c

Changed type of partition 'Linux' to 'W95 FAT32 (LBA)'.

Command (m for help): t
Partition number (1,2, default 2): 2
Hex code (type L to list all codes): 83

Changed type of partition 'Linux' to 'Linux'.

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.
 

• 格式化新的两个分区，如下：

   sudo mkfs.vfat -n boot /dev/sdd1

   sudo mkfs.ext3 -L rootfs /dev/sdd2

• 拷贝Image到SD卡的相应分区中，如下：

   cd build_s32g274ardb2/tmp/deploy/images/s32g274ardb2

   sudo dd if=u-boot.s32 of=/dev/sdd conv=notrunc bs=256 count=1 seek=0

   sudo dd if=u-boot.s32 of=/dev/sdd conv=notrunc bs=512 seek=1 skip=1 (写u-boot到/dev/sdd)

   sudo mount /dev/sdd1 /media/

   sudo cp Image /media (拷贝kernel image到/dev/sdd1)

   sudo cp fsl-s32g274a-rdb2.dtb /media/fsl-s32g274a-rdb2.dtb (拷贝dtb文件到/dev/sdd1)

   sudo umount /media

   sudo mount /dev/sdd2 /media

   sudo tar xf fsl-image-base-s32g274ardb2.tar.gz -C /media  (拷贝根文件系统到/dev/sdd2)

   sudo umount /media

2.QSPI方式

执行bitbake fsl-image-flash

生成.flashimage后缀的文件，整个进行烧写, 如下：

=> run flashbootargs
=> sf probe 6:0
=> setenv image fsl-image-flash-s32g274ardb2.flashimage
=> setenv loadaddr 0x85000000
=> run loadimage
=> sf erase ${uboot_flashaddr} +${filesize}
=> sf write ${loadaddr} ${uboot_flashaddr} ${filesize}

或者拷贝编译后生成的u-boot.s32, Image, fsl-s32g274a-rdb2.dtb，fsl-image-base-s32g274ardb2.cpio.gz.u-boot到SD卡中，然后在uboot命令行，通过如下命令进行烧写：

=> run flashbootargs
=> sf probe 6:0

1）u-boot

=> setenv image u-boot.s32

=> run loadimage

=> sf erase ${uboot_flashaddr} +${filesize}

=> sf write ${loadaddr} ${uboot_flashaddr} ${filesize}

2) linux kernel

=> setenv image Image

=> run loadimage

=> sf erase ${kernel_flashaddr} +${kernel_maxsize}

=> sf write ${loadaddr} ${kernel_flashaddr} ${kernel_maxsize}

3) Linux DTS

=> setenv image ${fdt_file}

=> run loadimage

=> sf erase ${fdt_flashaddr} +${fdt_maxsize}

=> sf write ${loadaddr} ${fdt_flashaddr} ${fdt_maxsize}

4) Linux filesystem

=> setenv Image fsl-image-base-s32g274ardb2.cpio.gz.u-boot

=> run loadimage
=> sf erase ${ramdisk_flashaddr} +${ramdisk_maxsize}
重新开机，然后使用QSPI的方式启动

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