Petalinux制做linux系统能够启动，但并不只限于此。html
好比以下疑问：linux
1.image.ub哪里来？这个文件名称必须是这个吗？bash
2.本身采用原始方法移植u-boot，kernel后怎么作？ui
对与第一个问题：.net
其中image.ub这个名称不能变，不然出现3d
reading image.ub can not read.
第二。image.ub哪里来？code
搜索资料只知道这个文件把image, rootfs,dtb打包到一个文件里面，如htm
http://www.wowotech.net/u-boot/fit_image_overview.htmlip
里面介绍的mkimage根据 kernel_fdt.its生成kernel_fdt.itb，可是这个不是ub格式的，ub是什么格式的?get
mkimage -l image.ub FIT description: U-Boot fitImage for plnx_arm kernel Created: Wed May 1 21:24:47 2019 Image 0 (kernel@0) Description: Linux Kernel Created: Wed May 1 21:24:47 2019 Type: Kernel Image Compression: uncompressed Data Size: 3747376 Bytes = 3659.55 kB = 3.57 MB Architecture: ARM OS: Linux Load Address: 0x00008000 Entry Point: 0x00008000 Hash algo: sha1 Hash value: 7a42c9f25a66f940cecbf6b02ba3028021a317d4 Image 1 (fdt@0) Description: Flattened Device Tree blob Created: Wed May 1 21:24:47 2019 Type: Flat Device Tree Compression: uncompressed Data Size: 18769 Bytes = 18.33 kB = 0.02 MB Architecture: ARM Hash algo: sha1 Hash value: d06aaa8ecccde42cc6ea78eae5decb442e290ad0 Image 2 (ramdisk@0) Description: ramdisk Created: Wed May 1 21:24:47 2019 Type: RAMDisk Image Compression: uncompressed Data Size: 5920476 Bytes = 5781.71 kB = 5.65 MB Architecture: ARM OS: Linux Load Address: unavailable Entry Point: unavailable Hash algo: sha1 Hash value: 3fddbe6f35125f3d01384076e11354d733d6866b Default Configuration: 'conf@1' Configuration 0 (conf@1) Description: Boot Linux kernel with FDT blob + ramdisk Kernel: kernel@0 Init Ramdisk: ramdisk@0 FDT: fdt@0 Configuration 1 (conf@2) Description: Boot Linux kernel with FDT blob Kernel: kernel@0 FDT: fdt@0
由此可知image.ub是mkimage生成的，那么这个.its是哪一个文件呢？
找了好久：
/build/tmp/deploy/images/plnx_arm/fitimage.its
里面的内容
/dts-v1/;
/ {
description = "U-Boot fitImage for plnx_arm kernel";
#address-cells = <1>;
images {
kernel@0 {
description = "Linux Kernel";
data = /incbin/("/home/flinn/peta/peta_top/build/tmp/deploy/images/plnx_arm/zImage");
type = "kernel";
arch = "arm";
os = "linux";
compression = "none";
load = <0x8000>;
entry = <0x8000>;
hash@1 {
algo = "sha1";
};
};
fdt@0 {
description = "Flattened Device Tree blob";
data = /incbin/("/home/flinn/peta/peta_top/build/tmp/deploy/images/plnx_arm/plnx_arm-system.dtb");
type = "flat_dt";
arch = "arm";
compression = "none";
hash@1 {
algo = "sha1";
};
};
ramdisk@0 {
description = "ramdisk";
data = /incbin/("/home/flinn/peta/peta_top/build/tmp/deploy/images/plnx_arm/petalinux-user-image-plnx_arm.cpio.gz");
type = "ramdisk";
arch = "arm";
os = "linux";
compression = "none";
hash@1 {
algo = "sha1";
};
};
};
configurations {
default = "conf@1";
conf@1 {
description = "Boot Linux kernel with FDT blob + ramdisk";
kernel = "kernel@0";
fdt = "fdt@0";
ramdisk = "ramdisk@0";
hash@1 {
algo = "sha1";
};
};
conf@2 {
description = "Boot Linux kernel with FDT blob";
kernel = "kernel@0";
fdt = "fdt@0";
hash@1 {
algo = "sha1";
};
};
};
};
能够看出与mkimage -l image.ub是一致的。
同时还能得出三个来源
/home/flinn/peta/peta_top/build/tmp/deploy/images/plnx_arm/zImage /home/flinn/peta/peta_top/build/tmp/deploy/images/plnx_arm/plnx_arm-system.dtb /home/flinn/peta/peta_top/build/tmp/deploy/images/plnx_arm/petalinux-user-image-plnx_arm.cpio.gz
也及有了这三个文件加上../build/tmp/deploy/images/plnx_arm/fitimage.its
能够经过下面指令获得image.ub
mkimage -f fitimage.its image.ub
最后烧写UBOOT.bin和image.ub到sd卡既能够启动了。