Voron is an experimental ARM based operating system for PandaBoard.

Features (until now)

• Uniprocessor support only (for now)
• Interrupt handling
• Memory management
• Simple kernel heap allocator (I will implement SLAB in the future)
• Round-robin scheduler
• Kernel threading
• Locking primitives
• Sleep/wakeup mechanism for processes

Compile

If you are not using an ARM architecture processor then you will need an ARM architecture toolchain, you can use arm-none-eabi from Sourcery CodeBench Lite. You will also need uboot-mkimage package. To compile voron, run

make

If you have another toolchain, for example arm-unknown-eabi, run

make CROSS_COMPILE=arm-unknown-eabi-

If you are using an ARM architecture processor, run

make CROSS_COMPILE=

Boot via SD card

First you must create a Fat32 or Fat16 partition in your SD card and mark it as boot. Then run (use CROSS_COMPILE if needed)

make bootloader

After this you must copy uImage, boot/boot.scr, boot/u-boot-linaro-stable/u-boot.bin and boot/u-boot-linaro-stable/MLO in your SD card. Insert the SD card into your PandaBoard and you are ready.

Boot via USB cable

Plug a USB cable at your PandaBoard and run

./scripts/panda_usbboot.sh

Output

I only use RS-232 Serial port for text output, so you will need minicom or screen. Run:

minicom -b 115200 -D /dev/ttyUSB0

OR

screen /dev/ttyUSB0 115200

License

I use FreeBSD license.