Wynter Woods zerotri

Rebuilding the firmware image

The Pine64 firmware consists of four parts:

The on-chip boot ROM (BROM), which cannot be changed and does the very first steps in loading code. It is part of the A64 SoC and thus not included here.
A secondary program loader (SPL): Its main task is to initialize the DRAM and load the remaining firmware parts. Due to BROM limitations the SPL is limited in size to 32K. The SPL can be a part of U-Boot, but at the moment we lack free source for the DRAM initialization. The alternative is to use Allwinner's boot0, which is a closed source, but redistributable blob serving the same purpose.
An EL3 runtime firmware. The task of this code is to provide runtime services like PSCI. It stays resident during the whole time and can be called from an OS like Linux to enable or disable secondary cores or request other services. It also takes care of low level CPU initialization and some errata handling. We use a version of ARM Trusted Firmware, based on the official 1.0 release from

Orthodox C++

This article has been updated and is available here.

Disabling GNOME Tracker and Other Info

GNOME's tracker is a CPU and privacy hog. There's a pretty good case as to why it's neither useful nor necessary here: http://lduros.net/posts/tracker-sucks-thanks-tracker/

After discovering it chowing 2 cores, I decided to go about disabling it.

Directories

Raspberry Pi Zero OTG Mode

Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).

The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int

TL;DR

Create 5GB FreeBSD image.
Install FreeBSD on xhyve.
Mount host directory.

	#![feature(lang_items, asm)]
	#![crate_type = "staticlib"]
	#![no_std]

	const GPIO_BASE: u32 = 0x3F000000;
	const GPIO_SET: u32 = 0x3F200020;
	const GPIO_CLR: u32 = 0x3F20002C;
	const GPIO47: u32 = 0x8000;

	fn sleep(value: u32){

	# curl -LO http://wiki.alpinelinux.org/cgi-bin/dl.cgi/v3.3/releases/x86_64/alpine-3.3.1-x86_64.iso
	curl -LO http://wiki.alpinelinux.org/cgi-bin/dl.cgi/v3.3/releases/x86/alpine-3.3.1-x86.iso

	# create hdd image (8GB)
	dd if=/dev/zero of=hdd.img bs=1g count=8

	# extract kernel and initramfs
	brew install cdrtools
	isoinfo -i alpine-3.3.1-x86.iso -J -x /boot/initramfs-grsec > initramfs-grsec
	isoinfo -i alpine-3.3.1-x86.iso -J -x /boot/vmlinuz-grsec > vmlinuz-grsec

	# Experimental 2016-01-10

	DOES NOT WORK YET.

	sudo -i
	apt-get update
	apt-get install --yes debootstrap zfsutils-linux zfs-initramfs zfs-dkms
	modprobe zfs

	# setup zfs

	package main

	import (
	"fmt"
	"os"
	"os/exec"
	"syscall"
	)

	func main() {

	#!/bin/sh

	# run on wakeup
	case "$1" in
	hibernate\|suspend)
	;;
	pre)
	modprobe -r bcm5974
	echo '*disable XHC1' >/proc/acpi/wakeup
	echo '*disable ARPT' >/proc/acpi/wakeup