Difference between revisions of "Embedded Linux system basis"
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==The kernel== | ==The kernel== | ||
| + | In our case Linux. | ||
==The rootfs== | ==The rootfs== | ||
Revision as of 10:58, 11 June 2010
An embedded Linux system is very similar (when speaking about software) to a Desktop one, thanks to the power of the latest embedded microprocessor, like the ARM9 one. It is composed of:
- a bootloader, which is the first bits of code executed when the processor starts. It behaves like the BIOS+Grub combination on Desktop PCs.
- an operating system = the Linux kernel
- many programs and librairies organised in a filesystem = the rootfs
The bootloader
In our case our bootloader is U-Boot. It's main role is to initialize the hardware, load the Linux kernel and launch it with the correct parameters
The kernel
In our case Linux.
The rootfs
It is composed of:
- a C library
- basic utilities (in our case regroup as one executable through Busybox)
- additionnal librairies and tools
