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Raspberry Pi 4

http://raspberrypi.org

Hardware Information

• ARMv8 Architecture (64-bit)

• Broadcom BCM2711 (SoC)

• Includes Quad ARM Cortex-A72 CPU @ 1.8 GHz

• Includes VideoCore VI GPU

• SD Card Storage

• 1, 2, 4 or 8 GB RAM

• Video Outputs

• 2x HDMI Video Output via micro-HDMI

• Composite Video Output

• Ethernet 10/100/1000 Mbit/s

• Wifi b/g/n/ac dual band 2.4/5 GHz

• Bluetooth 5.0

• 2x USB 2.0, 2x USB 3.0

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 ‘ef’

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

Boot Partition

Required Files

• start4.elf: The GPU binary firmware image

• fixup4.dat: Additional code for the GPU

• bcm2711-rpi-4-b.dtb: FDT binary for the Raspberry Pi 4B

• bcm2711-rpi-400.dtb: FDT binary for the Raspberry Pi 400

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

• u-boot.bin: u-boot loader for the Pi 4

• boot.scr: u-boot loader script for starting Haiku Loader

• uEnv.txt: configuration file for the boot.scr script

• haiku_loader.efi: Haiku Loader

Note: unlike previous Raspberry Pi models, there’s no bootcode.bin on the Raspberry Pi 4 as it’s replaced by a boot EEPROM.

Optional Files

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

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

Compiling Haiku and preparing SD card

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

• Build an ARM toolchain using "../configure --build-cross-tools arm --cross-tools-source ../../buildtools"

• Build SD card image using "jam -q -j6 @minimum-mmc"

• Prepare customized SD card using the "rune" tool. E.g. "rune -b rpi4 -i haiku-mmc.image /dev/mmcblk0"

Booting

1. SOC starts the boot EEPROM

2. Boot EEPROM runs start4.elf

3. start4.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

uart_2ndstage=1
enable_uart=1
kernel=u-boot.bin

Additional Information

Latest Raspberry Pi

firmware

config.txt options