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"

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

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

static void setup ():
	unsigned state = 0
	unsigned slot = alloc_slot ()
	while true:
		Cap::OMessage msg
		Kernel::wait (&msg, slot)
		switch msg.data[0].value ():
			case INIT_SET_GPIO:
				kdebug ("gpio\n")
				Caps caps = Cap (slot, 1)
				unsigned gpio_slot = caps.use ()
				Cap (slot, 0).invoke ()
				kbd = Cap (gpio_slot, 0)
				tp = Cap (gpio_slot, 1)
				lockleds = Cap (gpio_slot, 2)
				pwm = Cap (gpio_slot, 3)
				++state
				break
			case INIT_SET_LCD:
				kdebug ("lcd\n")
				lcd = Cap (slot, 1).clone ()
				Cap (slot, 0).invoke ()
				++state
				break
		if state == 2:
			break
	Caps caps = __my_memory.create_caps (2)
	Cap kc = __my_receiver.create_capability (KBD, Cap (slot, 0))
	kdebug ("init0: ")
	caps.print (0)
	kbd.set_cb (kc)
	kdebug ("init1: ")
	caps.print (0)
	Cap tc = __my_receiver.create_capability (TP, Cap (slot, 1))
	kdebug ("init2: ")
	caps.print (1)
	tp.set_cb (tc)
	kdebug ("init3: ")
	caps.print (1)
	pwm.call (1)
	free_slot (slot)

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

Num start ():
	// Set up lcd first
	Kernel::schedule ()
	kdebug ("start init\n")
	setup ()
	kdebug ("run init\n")
	while true:
		Cap::OMessage msg
		Kernel::wait (&msg)
		switch msg.cap_protected.value ():
			case KBD:
				unsigned code = msg.data[0].l
				if code & Keyboard::RELEASE:
					break
				kdebug_char (decode_kbd[code])
				break
			case TP:
				unsigned leds = 0
				if msg.data[0].l & 1:
					leds |= 0x1
				else:
					leds |= 0x4
				if !(msg.data[0].l & Keyboard::RELEASE):
					leds |= 0x2
				lockleds.call (leds)
				break