82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/*
|
|
* (C) Copyright 2006
|
|
* Detlev Zundel, DENX Software Engineering, dzu@denx.de.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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 2 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*
|
|
* This is a very simple standalone application demonstrating
|
|
* catching IRQs on the MPC52xx architecture.
|
|
*
|
|
* The interrupt to be intercepted can be specified as an argument
|
|
* to the application. Specifying nothing will intercept IRQ1 on the
|
|
* MPC5200 platform. On the CR825 carrier board from MicroSys this
|
|
* maps to the ABORT switch :)
|
|
*
|
|
* Note that the specified vector is only a logical number specified
|
|
* by the respective header file.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <exports.h>
|
|
#include <config.h>
|
|
|
|
#if defined(CONFIG_MPC5xxx)
|
|
#define DFL_IRQ MPC5XXX_IRQ1
|
|
#else
|
|
#define DFL_IRQ 0
|
|
#endif
|
|
|
|
static void irq_handler (void *arg);
|
|
|
|
int interrupt (int argc, char *argv[])
|
|
{
|
|
int c, irq = -1;
|
|
|
|
app_startup (argv);
|
|
|
|
if (argc > 1)
|
|
irq = simple_strtoul (argv[1], NULL, 0);
|
|
if ((irq < 0) || (irq > NR_IRQS))
|
|
irq = DFL_IRQ;
|
|
|
|
printf ("Installing handler for irq vector %d and doing busy wait\n",
|
|
irq);
|
|
printf ("Press 'q' to quit\n");
|
|
|
|
/* Install interrupt handler */
|
|
install_hdlr (irq, irq_handler, NULL);
|
|
while ((c = getc ()) != 'q') {
|
|
printf ("Ok, ok, I am still alive!\n");
|
|
}
|
|
|
|
free_hdlr (irq);
|
|
printf ("\nInterrupt handler has been uninstalled\n");
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Handler for interrupt
|
|
*/
|
|
static void irq_handler (void *arg)
|
|
{
|
|
/* just for demonstration */
|
|
printf ("+");
|
|
}
|