Linux kernel porting notes | 01 - transplant Linux 3.4.2 kernel to JZ2440 (compile the kernel configuration, set machid boot the kernel)

0. Linux kernel boot process

1. Obtain and extract the kernel sources

Linux kernel official website: www.kernel.org .

This tutorial is version 3.4.2, older, so I put in a public number, please pay attention to the public in the end the number Mculover666 reply keyword "kernel source" Get.

After acquiring placed on the Linux system, extract:

tar -jxvf linux-3.4.2.tar.bz2

Linux kernel has more than 30,000 files, v parameters can be removed, extract the information is not displayed.

2. Configure and compile

Into the unpacked folder:

cd linux-3.4.2/

2.1. Configurable architecture and compilation chain

In the makefile in the root directory of search ARCH, found as shown in two configurations:

• ARCH: To run Linux CPU architecture
• CROSS_COMPILE: Cross compiler name

2.2. Select the default profile

Into the arm architecture veneer default configuration file directory:

cd arch/arm/configs/

You can see all current arm architecture board configuration file:

here back to the root directory, set the s3c2410_defconfigdefault profile:

cd ../../../
make s3c2410_defconfig

Implementation of epigenetic became a configuration file .configused to compile:

in the boards supported by the file list is as follows:

2.3. Compile

make uImage

Wait compiled ......

Middle an error:

Access to information ( refer to blog post), this is because errors in the new version of Linux compiled on older versions of the kernel version appeared: the solution is:

The kernel/timeconst.plfile in the first row 373 defined () is removed as follows:

vim kernel/timeconst.pl

Re-make:

make uImage

I encountered a problem:

this is because Linux hosts make uImage image of a dependent package is not installed, run:

sudo apt-get install u-boot-tools

Compiled again, compiled successfully:

2.4 Test kernel image

Compile the kernel to copy files out easily downloaded to the local:

cp arch/arm/boot/uImage ../

Download this file to the TFTP server directory, and then get the file in uboot development board to memory:

tftp 30000000 uImage

启动内核：

bootm 30000000

可以看到，内核成功启动起来：

内核分区和挂载根文件系统有误，后续几篇文章中进行处理。

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