1.u-boot.elf == u-boot, 可以單獨用uboot編譯出來再利用petalinux製作BOOT.BIN
1.1 編譯BOOT.BIN的命令
petalinux-package --boot --fsbl zynq_fsbl.elf --fpga system.bit --u-boot
fast@fast-virtual-machine:~$ petalinux-package --boot --fsbl zynq_fsbl.elf --fpga system.bit
--u-boot
INFO: File in BOOT BIN: "/home/xxx/zedboardPrj/images/linux/zynq_fsbl.elf"
INFO: File in BOOT BIN: "/home/xxx/zedboardPrj/images/linux/system.bit"
INFO: File in BOOT BIN: "/home/xxx/zedboardPrj/images/linux/u-boot.elf"
INFO: Generating zynq binary package BOOT.BIN...
2.petalinux生成的文件系統鏡像沒有ramdisk文件，但可以用"rootfs.cpio.gz.u-boot" 文件代替
cp rootfs.cpio.gz.u-boot uramdisk.image.gz
3.bootm和bootz的不同地方
bootm用於加載uImage和ramdisk
bootm ${kernel_load_address} ${ramdisk_load_address} ${devicetree_load_address};
bootz用於加載zImage和ext4文件系統
bootz ${kernel_load_address} - ${devicetree_load_address}
#zImage 啓動信息
run sdboot_zImage
Copying Linux from MMC flash to RAM...
reading zImage
4165032 bytes read in 266 ms (14.9 MiB/s)
Read dtb file ...
reading devicetree.dtb
9846 bytes read in 13 ms (739.3 KiB/s)
## Flattened Device Tree blob at 02000000
Booting using the fdt blob at 0x2000000
Loading Device Tree to 1eb14000, end 1eb19675 ... OK
Starting kernel ...
#uImage ramdisk啓動信息
Zynq> run sdboot_ramdisk
Device: sdhci@e0100000
Manufacturer ID: 3
OEM: 5344
Name: SS08G
Tran Speed: 50000000
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 7.4 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes
** Unable to read file uEnv.txt **
Copying Linux from SD to RAM...
reading uImage
3757760 bytes read in 241 ms (14.9 MiB/s)
reading devicetree.dtb
9846 bytes read in 14 ms (686.5 KiB/s)
reading uramdisk.image.gz
856999 bytes read in 76 ms (10.8 MiB/s)
## Booting kernel from Legacy Image at 02080000 ...
Image Name: Linux-4.9.0-xilinx
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 3757696 Bytes = 3.6 MiB
Load Address: 00008000
Entry Point: 00008000
Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 04000000 ...
Image Name:
Image Type: ARM Linux RAMDisk Image (uncompressed)
Data Size: 856935 Bytes = 836.9 KiB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Flattened Device Tree blob at 02000000
Booting using the fdt blob at 0x2000000
Loading Kernel Image ... OK
Loading Ramdisk to 1ea48000, end 1eb19367 ... OK
Loading Device Tree to 1ea42000, end 1ea47675 ... OK
Starting kernel ...