/*-
 * Copyright (c) 2011 Advanced Computing Technologies LLC
 * Written by: John H. Baldwin <jhb@FreeBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

/*
 * Test application for /dev/lapic demo driver.  Maps the local APIC and outputs
 * some simple state.
 */

#include <sys/types.h>
#include <sys/mman.h>
#include <x86/apicreg.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>

int
main(int ac, char **av)
{
	lapic_t *la;
	int fd;

	fd = open("/dev/lapic", O_RDONLY);
	if (fd < 0)
		err(1, "open(\"/dev/lapic\")");
	la = mmap(NULL, sizeof(lapic_t), PROT_READ, MAP_SHARED, fd, 0);
	if (la == MAP_FAILED)
		err(1, "mmap");
	printf("Local APIC ID: %u\n", la->id >> APIC_ID_SHIFT);
	printf("Version: %x  Max LVT: %d\n", la->version & APIC_VER_VERSION,
	    (la->version & APIC_VER_MAXLVT) >> MAXLVTSHIFT);
	if (la->version & APIC_VER_EOI_SUPPRESSION)
		printf("Supports EOI suppression\n");
	close(fd);
	return (0);
}