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README: Add instructions for creating armv7a boards.

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Kelvin Lawson
2011-08-01 01:11:34 +01:00
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CROSS_COMPILE=/opt/arm-2009q3/bin/arm-none-eabi-
export CROSS_COMPILE
qemu-system-arm -M realview-pb-a8 -serial stdio -kernel build/kern2.elf
Following are the steps to add new board <abc> under armv7a port:
1. Create a directory under ports/armv7a with name <abc>
2. Add linker.ld in ports/armv7a/<abc> (similar to the one in ports/armv7a/pb-a8)
3. Add arm_pic.h, arm_timer.h, and arm_uart.h in ports/armv7a/<abc> (similar to the one in ports/armv7a/pb-a8)
4. Add .c files in ports/armv7a/<abc> to implement the board specific functions expected in arm_pic.h, arm_timer.h, and arm_uart.h
5. Add Makefile in ports/armv7a/<abc> (similar to the one in ports/armv7a/pb-a8) to build board specific objects corresponding to the .c files added in step 4.
5. To build atomthreads for <abc> board use following command "make BOARD=<abc>" with ports/armv7a as current directory.