mahatma.c

/*
 * main program entry point
 *
 * Copyright (c) 2009 Openmoko Inc.
 *
 * Authors   Daniel Mack <daniel@caiaq.de>
 *           Christopher Hall <hsw@openmoko.com>
 *
 * 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/>.
 */

/* wikilib and guilib includes */
#include <guilib.h>
#include <wikilib.h>
#include <input.h>
#include <stdlib.h>
#include <malloc-simple.h>
#include <tff.h>
#include <regs.h>
#include <profile.h>
#include <tick.h>
#include <suspend.h>
#include <analog.h>
#include <temperature.h>
#include <file-io.h>

/* local includes */
#include "msg-output.h"
#include "serial.h"
#include "traps.h"
#include "gui.h"
#include "msg.h"
#include "touchscreen.h"
#include "gpio.h"
#include "gui.h"

#define VERSION "0.4"

static FATFS fatfs;

__attribute ((noreturn))
int main(void)
{
	// set the initial stack and data pointers
	asm volatile (
		"\txld.w\t%r15, __MAIN_STACK\n"
		"\tld.w\t%sp, %r15\n"
		"\txld.w\t%r15, __dp\n"
		"\tld.w\t%r4, 0\n"
		"\tld.w\t%psr, %r4\n"
		);

	// critical first initialisation
	Suspend_initialise();  // set up clocks so must be first
	traps_init();          // set up vectors so must be second

	// other high priority initialisation
	Tick_initialise();
	Analog_initialise();
	Temperature_initialise();
	msg_init();

	// start of normal initialisation
	// anything below here can use debug outputs
	msg(MSG_INFO, "Starting\n");

	// initialise remainder of I/O
	gpio_init();
	touchscreen_init();
	fb_init();

	// set up memory manager before remaining initialisation
	malloc_init_simple();

	if (f_mount(0, &fatfs) != FR_OK)
		msg(MSG_INFO, "unable to mount FAT filesystem!\n");

	wikilib_init();
	//guilib_init();
	profile_init();

	// initialisation complete
	msg(MSG_INFO, "Mahatma super slim kernel v%s\n", VERSION);
	int fd = wl_open("version.txt", WL_O_RDONLY);
	if (fd >= 0) {
		msg(MSG_INFO, "Display version.txt\n");
		for (;;) {
			char c;
			size_t len = wl_read(fd, &c, 1);
			if (len <= 0) {
				break;
			}
			msg(MSG_INFO, "%c", c);
		}
		wl_close(fd);
	} else {
		msg(MSG_INFO, "Missing version.txt\n");
	}

	// the next function will loop forever and call wl_input_wait()
	for (;;) {
		wikilib_run();
	}
}