Linux Kernel compilation and cropping (ARM)

System: ubuntu10.10

1. First, create an arm-Linux-GCC cross-compilation environment:

Download arm-Linux-Gcc-3.4.1.tar.bz2

Copy and decompress

# Cd/
Copy arm-Linux-Gcc-3.4.1.tar.bz2 to the root directory
# Tar jxvf arm-Linux-Gcc-3.4.1.tar.bz2

This will generate a/usr/local/ARM directory.

2. Download The linux-2.6.30.4.tar.bz2 source package to www.kernel.organd decompress the package in the main directory.

Check the top-level makefile, find the arch and cross_compile definitions, and change:

Arch? = Arm

Cross_compile? = Arm-Linux-

Then you need to modify the path:

Add export Path = $ path:/usr/local/ARM/3.4.1/bin/at the end of the. profile file in the main directory/

3. Specify initialization at startup

 

When the kernel is started, perform initial configuration based on the partition settings.

 

Modify ARCH/ARM/machs3c2410/machsmdk2410.c
File

 

Vi arch/ARM/machs3c2410/machsmdk2410.c

 

Modify smdk2410_devices []. Specify that the flash
Partition Information

 

Static struct platform_device * smdk2410_devices [] _ initdata = {

 

& Initi_device_usb,

 

& Amp; cloud_device_ LCD,

 

& Amp; cloud_device_wdt,

 

& Amp; initi_device_i2c,

 

& Amp; cloud_device_iis,

 

/* Add the following statement */

 

& Amp; cloud_device_nand,

 

};

 

Save and exit.

 

 

 

1.4 configure the kernel

 

Support mounting devfs at startup

 

To support devfs for our Kernel
And at startup and in/sbin/init
It can be automatically mounted before running/Dev is devfs
File System,
Modify

 

FS/kconfig
File

 

VI fs/kconfig

 

Find menu "pseudo filesystems"

 

Add the following statement:

 

Config devfs_fs

 

Bool "/dev File System Support (obsolete )"

 

Default y

 

Config devfs_mount

 

Bool "automatically mount at Boot"

 

Default y

 

Depends on devfs_fs

 

 

4,
Configure the kernel to generate the. config file

 

Cp arch/ARM/configs/s3c2410_defconfig. config

 

Make menuconfig

 

Libncurses is missing. Run the following command:

Sudo apt-Get install libncurses5-dev

If the message is missing, run:

Sudo apt-Get install-F

Then:

Sudo apt-Get install libncurses5-dev

Then makemenuconfig

That's all.

Pop-up:

 

 

This is the interface for selecting a module. I did not modify it first, quit directly, and then execute:

Make zimage

Compile the kernel:

 

Compilation completed:

 

We can see that the zimage size is 1.8 m:

 

Then configure again and remove loadable module support

And networksupport, re-compile:

 

However, the size of the zimage generated this time has changed to 2 MB.