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Raspberry Pi

http://raspberrypi.org

Hardware Information

• ARMv6 Architecture

• Broadcom BCM2835 (SoC)

• Includes ARM1176JZF-S CPU @ 700 MHz

• Includes VideoCore IV GPU

• SD Card Storage

• 256 or 512 MB RAM (depending on revision)

• Video Outputs

• HDMI Video Output

• Composite Video Output

• Ethernet

Setting up the Haiku SD card

The Raspberry Pi SD card generally uses the MBR file system layout below. Partition 1 is all that is required to boot an OS.

• partition 1 – FAT32, bootable flag, type ‘c’

• partition 2 – BeFS, Haiku filesystem, type ‘eb’

Boot Partition

Required Files

• bootcode.bin : 2nd stage bootloader

• start.elf: The GPU binary firmware image

• config.txt: A configuration file read by the Pi to start u-boot.bin

• u-boot.bin: u-boot loader for the Pi 2

• bcm2835-rpi-b.dtb: FDT binary for the Raspberry Pi 2

• haiku_loader_linux.ub: Haiku Loader

• haiku-floppyboot.tgz.ub: Compressed initial ram image with Haiku kernel

Optional Files

• vlls directory: Additional GPU code, e.g. extra codecs.

• uEnv.txt: u-boot configuration script to automate boot.

Compiling

• Create your ARM work directory "mkdir generated.arm; cd generated.arm"

• Build an ARM toolchain using "../configure --build-cross-tools arm ../../buildtools --target-board=rpi1"

• Build our loader using "jam -q haiku_loader_linux.ub"

• Build our initial ram disk using "jam -q haiku-floppyboot.tgz.ub"

Booting

1. SOC finds bootcode.bin

2. bootcode.bin runs start.elf

3. start.elf reads config.txt and start u-boot

4. u-boot.bin starts the Haiku loader

5. Haiku loader boots Haiku kernel

config.txt Options

kernel=u-boot.bin

u-boot startup

These will be condensed and automated long-term via uEnv.txt :-)

• "fatload mmc 0 ${fdt_addr_r} bcm2835-rpi-b.dtb"

• "fdt addr ${fdt_addr_r}"

• "fatload mmc 0 ${ramdisk_addr_r} haiku-floppyboot.tgz.ub"

• "fatload mmc 0 ${kernel_addr_r} haiku_loader_linux.ub"

• "bootm ${kernel_addr_r} ${ramdisk_addr_r} ${fdt_addr_r}"

Additional Information

Latest Raspberry Pi

firmware

config.txt options