iris/boot-programs/init.ccp

#pypp 0
// Iris: micro-kernel for a capability-based operating system.
// boot-programs/init.ccp: System boot manager.
// Copyright 2009 Bas Wijnen <wijnen@debian.org>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#include "devices.hh"
#include "iris.hh"
#include "init.hh"

static Keyboard kbd, tp
static Display lcd
static Kernel::Cap lockleds, pwm

// Event types.
enum type:
	KBD = 0x10000
	TP

static void setup ():
	unsigned state = 0
	Kernel::Caps my_caps = Kernel::my_memory.create_caps (4 + 1)
	unsigned my_slot = my_caps.use ()
	unsigned slot = Kernel::alloc_slot ()
	while true:
		Kernel::wait ()
		Kernel::Cap reply = Kernel::get_reply ()
		Kernel::Caps caps = Kernel::get_arg ()
		switch Kernel::recv.data[0].value ():
			case Init::REGISTER_GPIO:
				caps.use (slot)
				for unsigned i = 0; i < 4; ++i:
					my_caps.set (i, Kernel::Cap (slot, i).copy ())
				kbd = Kernel::Cap (my_slot, 0)
				tp = Kernel::Cap (my_slot, 1)
				lockleds = Kernel::Cap (my_slot, 2)
				pwm = Kernel::Cap (my_slot, 3)
				break
			case Init::REGISTER_LCD:
				caps.use (slot)
				my_caps.set (4, Kernel::Cap (slot, 0).copy ())
				lcd = Kernel::Cap (my_slot, 4)
				break
			default:
				kdebug ("unknown setup request for init\n")
				continue
		reply.invoke ()
		Kernel::free_cap (caps)
		Kernel::free_cap (reply)
		if ++state == 2:
			break
	Kernel::free_cap (my_caps)
	Kernel::free_slot (slot)
	Kernel::schedule ()
	Kernel::Cap kc = Kernel::my_receiver.create_capability (KBD)
	kbd.set_cb (kc)
	Kernel::Cap tc = Kernel::my_receiver.create_capability (TP)
	tp.set_cb (tc)
	pwm.call (1)

char const *decode_kbd = "0123456789abcdefghijklmnopqrstuvwxyz!@#$%^&*() T\n[],.-=/\\;|`'UDLREIKBPFZMS{}CA\":"

Kernel::Num start ():
	// Set up lcd first
	Kernel::schedule ()
	setup ()
	while true:
		Kernel::wait ()
		switch Kernel::recv.protected_data.value ():
			case KBD:
				unsigned code = Kernel::recv.data[0].l
				if code & Keyboard::RELEASE:
					break
				kdebug_char (decode_kbd[code])
				if code == 0:
					Kernel::Caps ().print (~0)
				break
			case TP:
				unsigned leds = 0
				if Kernel::recv.data[0].l & 1:
					leds |= 0x1
				else:
					leds |= 0x4
				if !(Kernel::recv.data[0].l & Keyboard::RELEASE):
					leds |= 0x2
				lockleds.call (leds)
				break