33e204adee
* Version 17-02-2012 * Used to initialize the Raspberry Pi GPU and boot it * License is permissive, I've also included the confirmation email on this license. * Little bootloader documentation. * Still nothing to get excited about, preliminary.
33 lines
1.3 KiB
Plaintext
33 lines
1.3 KiB
Plaintext
Some early bootloader information from Raspberry Pi foundation...
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Setting up the boot partition
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partition 1 -- FAT32, bootable flag, type 'c'
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partition 2 -- os, whatever
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The boot partition must contain the following files,
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get them from one of the official images:
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* bootcode.bin : 2nd stage bootloader, starts with SDRAM disabled
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* loader.bin : 3rd stage bootloader, starts with SDRAM enabled
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* start.elf: The GPU binary firmware image, provided by the foundation.
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* kernel.img: The OS kernel to load on the ARM processor.
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Normally this is Linux - see instructions for compiling a kernel.
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* cmdline.txt: Parameters passed to the kernel on boot.
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Optional files:
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* config.txt: A configuration file read by the GPU.
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Use this to override set the video mode, alter system clock speeds,
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voltages, etc.
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* vlls directory: Additional GPU code, e.g. extra codecs.
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Not present in the initial release.
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Additional GPU firmware images, rename over start.elf to use them:
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* arm128_start.elf : 128M ARM, 128M GPU split
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- use this for heavy 3D work, possibly also required for some video decoding)
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* arm192_start.elf : 192M ARM, 64M GPU split
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- this is the default
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* arm224_start.elf : 224M ARM, 32M GPU split
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- (use this for Linux only with no 3D or video processing.
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Its enough for the 1080p framebuffer, but not much else)
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