Provides a framework and initial modules for initramfs

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+#!/bin/sh
+# Copyright (C) 2011 O.S. Systems Software LTDA.
+# Licensed on MIT
+
+finish_enabled() {
+	return 0
+}
+
+finish_run() {
+	if [ -n "$ROOTFS_DIR" ]; then
+		if [ -n "$bootparam_rootdelay" ]; then
+			debug "Sleeping for $rootdelay second(s) to wait root to settle..."
+			sleep $bootparam_rootdelay
+		fi
+
+		if [ -n "$bootparam_root" ]; then
+			debug "No e2fs compatible filesystem has been mounted, mounting $bootparam_root..."
+
+			if [ -e "$bootparam_root" ]; then
+				mount $bootparam_root $ROOTFS_DIR
+			else
+				debug "root '$bootparam_root' doesn't exist."
+			fi
+		fi
+
+		if [ ! -d $ROOTFS_DIR/dev ]; then
+			fatal "ERROR: There's no '/dev' on rootfs."
+		fi
+
+		info "Switching root to '$ROOTFS_DIR'..."
+
+		debug "Moving /dev, /proc and /sys onto rootfs..."
+		mount --move /dev $ROOTFS_DIR/dev
+		mount --move /proc $ROOTFS_DIR/proc
+		mount --move /sys $ROOTFS_DIR/sys
+
+		cd $ROOTFS_DIR
+		exec switch_root -c /dev/console $ROOTFS_DIR /sbin/init
+	else
+		debug "No rootfs has been set"
+	fi
+}

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+DESCRIPTION = "initramfs modular system base"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+RDEPENDS = "busybox"
+
+inherit allarch
+
+SRC_URI = "file://init \
+           file://finish"
+
+do_install() {
+    install -d ${D}/init.d
+    install -m 0755 ${WORKDIR}/init ${D}/init
+    install -m 0755 ${WORKDIR}/finish ${D}/init.d/99-finish
+}
+
+FILES_${PN} = "/init /init.d/*"

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+#!/bin/sh
+# Copyright (C) 2011 O.S. Systems Software LTDA.
+# Licensed on MIT
+
+# Adds support to dynamic debugging of initramfs using bootparam in
+# following format:
+#   shell                 : starts a shell before and after each module
+#   shell=before:<module> : starts a shell before <module> is loaded and run
+#   shell=after:<module>  : starts a shell after <module> is loaded and run
+#
+#   shell-debug                 : run set -x as soon as possible
+#   shell-debug=before:<module> : run set -x before <module> is loaded and run
+#   shell-debug=after:<module>  : run set -x after <module> is loaded and run
+
+DEBUG_SHELL="false"
+
+debug_hook_handler() {
+	status=$1
+	module=$2
+
+	if [ -n "$bootparam_shell" ] && [ "$bootparam_shell" != "true" ]; then
+		shell_wanted_status=`expr $bootparam_shell : '\(.*\):.*'`
+		shell_wanted_module=`expr $bootparam_shell : '.*:\(.*\)'`
+
+		if [ "$shell_wanted_status" = "before" ]; then
+			shell_wanted_status=pre
+		else
+			shell_wanted_status=post
+		fi
+	fi
+
+	if [ "$bootparam_shell" = "true" ] ||
+		( [ "$status" = "$shell_wanted_status" ] &&
+			[ "$module" = "$shell_wanted_module" ] ); then
+		if [ "$status" = "pre" ]; then
+			status_msg="before"
+		else
+			status_msg="after"
+		fi
+
+		msg "Starting shell $status_msg $module..."
+		sh
+	fi
+
+	if [ -n "$bootparam_shell_debug" ] && [ "$bootparam_shell_debug" != "true" ]; then
+		shell_debug_wanted_status=`expr $bootparam_shell_debug : '\(.*\):.*'`
+		shell_debug_wanted_module=`expr $bootparam_shell_debug : '.*:\(.*\)'`
+
+		if [ "$shell_debug_wanted_status" = "before" ]; then
+			shell_debug_wanted_status=pre
+		else
+			shell_debug_wanted_status=post
+		fi
+	fi
+
+	if [ "$bootparam_shell_debug" = "true" ] ||
+		( [ "$status" = "$shell_debug_wanted_status" ] &&
+			[ "$module" = "$shell_debug_wanted_module" ] ); then
+		if [ "$DEBUG_SHELL" = "true" ]; then
+			return 0
+		fi
+
+		if [ "$status" = "pre" ]; then
+			status_msg="before"
+		else
+			status_msg="after"
+		fi
+
+		msg "Starting shell debugging $status_msg $module..."
+		DEBUG_SHELL="true"
+		set -x
+	fi
+}
+
+debug_enabled() {
+	return 0
+}
+
+debug_run() {
+	add_module_pre_hook "debug_hook_handler"
+	add_module_post_hook "debug_hook_handler"
+}

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+DESCRIPTION = "initramfs debug helper"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+RDEPENDS = "initramfs-base"
+
+inherit allarch
+
+SRC_URI = "file://debug"
+
+do_install() {
+    install -d ${D}/init.d
+    install -m 0755 ${WORKDIR}/debug ${D}/init.d/00-debug
+}
+
+FILES_${PN} = "/init.d/*"

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+#!/bin/sh
+# Copyright (C) 2011 O.S. Systems Software LTDA.
+# Licensed on MIT
+
+mdev_enabled() {
+	if [ ! -e /sbin/mdev ]; then
+		debug "/sbin/mdev doesn't exist"
+		return 1
+	fi
+
+	return 0
+}
+
+mdev_run() {
+	# setup the environment
+	mount -t tmpfs tmpfs /dev
+
+	mkdir -m 1777 /dev/shm
+
+	mkdir -m 0755 /dev/pts
+	mount -t devpts devpts /dev/pts
+
+	echo /sbin/mdev > /proc/sys/kernel/hotplug
+	mdev -s
+
+	# load modules for devices
+	find /sys -name modalias | while read m; do
+		load_kernel_module $(cat $m)
+	done
+}

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+DESCRIPTION = "initramfs support for mdev"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+RDEPENDS = "initramfs-base"
+RCONFLICTS = "initramfs-module-udev"
+
+inherit allarch
+
+SRC_URI = "file://mdev"
+
+do_install() {
+    install -d ${D}/init.d
+    install -m 0755 ${WORKDIR}/mdev ${D}/init.d/01-mdev
+}
+
+FILES_${PN} = "/init.d/*"

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+#!/bin/sh
+# Copyright (C) 2011 O.S. Systems Software LTDA.
+# Licensed on MIT
+
+e2fs_enabled() {
+	return 0
+}
+
+e2fs_run() {
+	filesystems="ext4 ext3 ext2"
+
+	# load modules
+	for fs in $filesystems; do
+		load_kernel_module $fs
+	done
+
+	for fs in $filesystems; do
+		eval "fs_options=\$bootparam_${fs}"
+		if [ -n "$fs_options" ]; then
+		    dev=`expr "$fs_options" : '\([^:]*\).*'`
+		    path=`expr "$fs_options" : '[^:]*:\([^:]*\).*'`
+
+		    info "Mounting $dev as $fs on $path as $fs..."
+			mkdir -p $path
+		    mount -t $fs $dev $path
+		fi
+	done
+}

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+DESCRIPTION = "initramfs support for ext2/ext3/ext3"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+RDEPENDS = "initramfs-base"
+
+inherit allarch
+
+SRC_URI = "file://e2fs"
+
+do_install() {
+    install -d ${D}/init.d
+    install -m 0755 ${WORKDIR}/e2fs ${D}/init.d/20-e2fs
+}
+
+FILES_${PN} = "/init.d/*"

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+#!/bin/sh
+# Copyright (C) 2011 O.S. Systems Software LTDA.
+# Licensed on MIT
+
+udev_enabled() {
+	if [ ! -e /sbin/udevd ]; then
+		debug "/sbin/udev doesn't exist"
+		return 1
+	fi
+
+	return 0
+}
+
+udev_run() {
+	mkdir -p /run
+
+	udevd --daemon > /dev/null
+	udevadm trigger --action=add
+	udevadm settle
+
+	killall udevd 2>/dev/null
+}

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+DESCRIPTION = "initramfs support for udev"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+RDEPENDS = "initramfs-base udev udev-utils"
+RCONFLICTS = "initramfs-module-mdev"
+
+inherit allarch
+
+SRC_URI = "file://udev"
+
+do_install() {
+    install -d ${D}/init.d
+    install -m 0755 ${WORKDIR}/udev ${D}/init.d/01-udev
+}
+
+FILES_${PN} = "/init.d/*"