hello.c

pebble

/* 
 * Copyright 1999, 2000, 2001, 2002 Lucent Technologies Inc.
 * All Rights Reserved.
 * Information Sciences Research Center, Bell Labs.
 *
 * LUCENT TECHNOLOGIES DOES NOT CLAIM MERCHANTABILITY OF THIS SOFTWARE 
 * OR THE SUITABILITY OF THIS SOFTWARE FOR ANY PARTICULAR PURPOSE. The
 * software is provided "as is" without expressed or implied warranty 
 * of any kind.
 *
 * These notices must be retained in any copies of any part of this
 * software.
 *
 */

#include "unistd.h"
#include "types.h"
#include "pebble.h"
#include "diag.h"
#include "time.h"
#include "nucleus.h"

Time now;

/* every one second */
static void
watchdog_handler(void *val)
{
	now = hrtime();

	if (0)
	   printf("thread %p hello, world, time = %u %u!\n",
		       get_thread(), (uint)(now>>32), (uint)now);
	if (0)
	   printf("psw = %08x\n", (int)get_psw());

	timeout(watchdog_handler, 0, hrtime() + 500000000);
	return;
}

#define SPAWN		0	/* test semaphore */
#define TIMEOUT		1	/* test timeout */

int s;

void
thread_handler(int foo)
{
	printf("will block\n");
	sem_wait(s);
	printf("woke up!\n");
}

Time start;
uint startcount;

int
main(int arg, char *argv[])
{
	int c, asid;
	volatile int *cp, v;

	asid = get_asid();

	now = hrtime();

	printf("main %p hello, world, time = %u %u, count = %u,"
		"compare = %u!\n", get_thread(),
		(uint)(now>>32), (uint)now, (uint)get_count,
		(uint)get_compare());

	if (TIMEOUT)
	if (timeout(watchdog_handler, 0, 500000000) < 0)
		panic("timeout() for watchdog handler failed");

	s = sem_create(0);

	if (SPAWN) if (0 > thr_spawn(thread_handler, 0))
		panic("spawn failed");

	yield();

	if (SPAWN) sem_post(s);

	yield();

	while(0) {
		 c++;
		 if ((c % 4000000) == 0) {
			now = hrtime();
			printf("now = %u %u, count = %u, compare = "
				    "%u\n", 
				    (uint)(now>>32), (uint)now,
				    (uint)get_count(), (uint)get_compare());
			yield();
		 }
	}

	cp = (int *) call_portal(SYS_TRANSMEM, 8192);

	/* we should now be ready to take page faults */

	printf("about to touch %p\n", cp);

	v = *cp;	/* will cause a page fault but no protection fault */

	start = hrtime();
	startcount = get_count();
	*cp = 44;

	printf("*cp = %d, start = %u %u, startcount = %d\n", *cp, (uint)(start>>32), (uint)start, startcount);

	printf ("TEST ENDING HERE\n");

	task_exit(0);

	return(0);	/* to make GCC happy */
}