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tn2916_boot_from_nand_omap2420.fm - Rev. D 6/07 EN
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TN-29-16: Boot-from-NAND with the TI OMAP2420 Processor
Stage 4: Operating System
Stage 4: Operating System
The final stage of the boot process involves the initial execution of the OS. The operating
system kernel is stored in NAND Flash and shadowed to DRAM for execution as
described in the stage 3 boot description. When the system jumps to the beginning of
the OS code (see Figures 10), the OS takes control of the system.
Figure 10: Kernel Process: OS Takes Control
Micron NAND Flash
Micron DRAM
OMAP2420 processor ROM
OMAP2420 processor SRAM
X-Loader
ROM code
U-Boot
U-Boot
U-Boot
environment data
OS kernel
File system
Kernel process
OS kernel
