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haiku/docs/develop/ports/arm/raspberry_pi.md
Alexander von Gluck IV 107ab75ea6 docs: Clean up RaspberryPi Documentation; move 
* Convert the RaspberryPi documentation to markdown
* Move into the proper arm port docs location
2013-04-28 12:37:36 -05:00

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Raspberry Pi

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
  • haiku_loader: Haiku Loader
  • haiku-floppyboot.tgz: Compressed image with Haiku kernel
  • config.txt: A configuration file read by the GPU.

Optional Files

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

Compiling

  • Build an ARM toolchain using ./configure --build-cross-tools-gcc4 arm ../buildtools
  • Build our loader using jam -q -sHAIKU_BOOT_BOARD=raspberry_pi -sHAIKU_BOOT_PLATFORM=raspberrypi_arm haiku_loader
  • Build our file system using jam -q -sHAIKU_BOOT_BOARD=raspberry_pi -sHAIKU_BOOT_PLATFORM=raspberrypi_arm haiku-floppyboot.tgz

Booting

  1. SOC finds bootcode.bin
  2. bootcode.bin runs start.elf
  3. start.elf reads config.txt and cmdline.txt
  4. start.elf runs specified binary at specified address

config.txt Options

kernel=haiku_loader
kernel_address=0x0
disable_commandline_tags=1
ramfsfile=haiku-floppyboot.tgz
ramfsaddr=0x04000000

Additional Information