Difference between revisions of "Embedded Linux system basis"
From ArmadeusWiki
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m (→The rootfs) |
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It is composed of: | It is composed of: | ||
* a C library | * a C library | ||
− | * basic utilities (in our case | + | * basic utilities (in our case regrouped as one executable through [[Busybox]]) |
* additionnal librairies and tools | * additionnal librairies and tools |
Revision as of 09:59, 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 regrouped as one executable through Busybox)
- additionnal librairies and tools