Steps to Build Kernel and Root Filesystem for OMAP5912
- 1. OMAP
- 2. Abbreviation for OMAP OMAP – O pen M ulti Media A pplication P latform
- 3. OMAP5912 The OMAP5912 is a dual core processor with ARM and DSP integrated into a single silicon.
- 4. Application of OMAP Java enabled Mobile Smart Phone PDA Wireless Internet Applications Networking Applications Digital set top boxes
- 5. Features of OMAP5912 OMAP5912 processor (192MHz ARM, 192MHz DSP) 32 Mega Bytes Mobile DDR SDRAM 32 Mega Bytes on-board Flash 10 Mega bit Ethernet Interface USB Host Interface AIC23 stereo codec RS-232 serial port
- 6. Requirement's OMAP5912 starter kit-OSK Personal computer RJ-45 Ethernet cable Universal 5V power supply 9 pin serial null modem cable An open source kernel for OSK A filesystem to work with OSK
- 7. Requirement's from Host Side Red Hat Linux 7.3 or 9.0 1 GB free disk space Serial port Local CD-ROM drive Ethernet adapter
- 8. Development Environment for Linux Bootloader Bootloader Parameters Kernel Root Filesystem
- 9. Bootloader Support Bootloader – U- Boot Patch for OMAP5912 Board Support in Bootloader Compile Bootloader for required architecture. There are 2 ways of Recovering the Bootloader 1. USB 2. Serial Cable
- 10. Bootloader Parameter Parameter gives information which baudrate system boots Parameter gives information about filesystem Parameter gives information to the kernel where root filesystem information.
- 11. Kernel Download tar image from kernel.org Check for architecture support, if not patch for the support in kernel. Configure the kernel make OMAP make omap_osk_5912_defconfig
- 12. Kernel make menuconfig- configure the kernel. Cross-Compile the kernel to get kernel Image by make ARCH= ( arch type ) make CROSS_COMPILE= (Compiler name) make ImageName Kernel Image is fused through means bootloader command.
- 13. Root Filesystem Create a default required directories Copy the libc-2.3.2.so with his link to /lib directory. Copy the required libraries for our applications. make a entry in /etc/rc.d to mount proc and sys filesystem
- 14. Root Filesystem BusyBox -BusyBox combines tiny versions of many common UNIX utilities into a single small executable. make menuconfig to configure the required command. copy the executable image to /bin directory make a symbolic link to image to create a required image.
- 15. Root Filesystem Image Create a flash based root filesystem image using mkfs.jffs2 Image is fused through 2 modes 1. Network – Mounting the filesystem 2. Serial – Permanently fusing the filesystem
- 16. Application Porting Application are ported in 2 ways 1. Permanently Fusing 2. Temporarily. Permanently- Make the image and fused into the flash permanently. Temporarily- Mounting the filesystem, temporarily for testing purposes.