//-------------------------------------------------------------------
//	issuesmi.cpp
//
//	This program uses services of our 'smram.c' device-driver to 
//	trigger a System Management Interrupt on the processor whose
//	id-number is supplied as a command-line argument.
//
//	      compile using:  $ g++ issuesmi.cpp -o issuesmi
//	      execute using:  $ ./issuesmi <cpu>
//
//	programmer: ALLAN CRUSE
//	date begun: 07 DEC 2008
//-------------------------------------------------------------------

#include <stdio.h>	// for perror() 
#include <fcntl.h>	// for open() 
#include <stdlib.h>	// for atoi(), exit() 
#include <sys/ioctl.h>	// for ioctl()

char devname[] = "/dev/smram";

int main( int argc, char **argv )
{
	int	request = 0;	// no destination-shorthand
	long	cpu = 0;	// default processor number

	// setup processor-number from command-line argument
	if ( argc > 1 ) cpu = atoi( argv[1] ) & 0xFF;

	// open the device-file
	int	fd = open( devname, O_RDWR );
	if ( fd < 0 ) { perror( devname ); exit(1); }

	// issue a System Management Interrupt to the processor 
	if ( ioctl( fd, request, cpu ) < 0 ) perror( "ioctl" ); 
}