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ROM-5420 User Manual 24
3.2.1.6 source
This folder contains sub-directories “linux-3.0.35” and “u-boot-2009.08”. They are the
source codes of the Linux kernel and U-boot.
Linux is a clone of the operating system UNIX. It has all the features you would
expect in a modern fully-fledged UNIX, including true multitasking, virtual memory,
shared libraries, demand loading, shared copy-on-write executables, proper memory
management, and multitask networking including IPv4 and IPv6.
Linux is easily portable to most general-purpose 32- or 64-bit architectures as long as
they have a paged memory management unit (PMMU) and a port of the GNU C com-
piler (gcc) (part of The GNU Compiler Collection, GCC). Linux has also been ported
to a number of architectures without a PMMU, although functionality is then obviously
somewhat limited. Linux has also been ported to itself.
The main sub-directories under “linux-3.0.35” are listed as follows:
There are plenty of documentations or materials available on Internet and also could
be obtained from books and magazines, you can easily find the answers for both
Linux-specific and general UNIX questions.
There are also various README files in ./source/linux-3.0.35/Documentation, you
can find the kernel-specified installations and notes for drivers. You can refer to ./
source/linux-3.0.35/Documentation/00-INDEX for a list of the purpose of each
README/note.
mksd-linux.sh A script to setup up a bootable SD card if users build their images
arch The items related to hardware platform, most of them are for CPU.
block The setting information for block.
crypto The encryption technology that kernel supports.
Documentation The documentation for kernel.
drivers The drivers for hardware.
firmware Some of firmware data for old hardware.
fs The file system the kernel supports.
include The header definition for the other programs used.
init The initial functions for kernel.
ipc Define the communication for each program of Linux O.S.
kernel Define the Kernel process, status, schedule, signal.
lib Some of libraries.
mm The data related the memory.
net The data related the network.
security The security setting.
sound The module related audio.
virt The data related the virtual machine.
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