/* irq_init.c
 *
 *  This file contains the implementation of rtems initialization
 *  related to interrupt handling.
 *
 *  CopyRight (C) 1999 valette@crf.canon.fr
 *
 * Enhanced by Jay Kulpinski <jskulpin@eng01.gdds.com>
 * to make it valid for MVME2300 Motorola boards.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.com/license/LICENSE.
 *
 *  irq_init.c,v 1.6.2.5 2003/09/04 18:45:20 joel Exp
 */

#include <libcpu/io.h>
#include <libcpu/spr.h>
#include <bsp/irq.h>
#include <bsp.h>
#include <libcpu/raw_exception.h>
#include <rtems/bspIo.h>

/*
 * default on/off function
 */
static void nop_func(){}
/*
 * default isOn function
 */
static int not_connected() {return 0;}
/*
 * default possible isOn function
 */
static int connected() {return 1;}

static rtems_irq_connect_data     	rtemsIrq[BSP_IRQ_NUMBER];
static rtems_irq_global_settings     	initial_config;
static rtems_irq_connect_data     	defaultIrq = {
  /* vectorIdex,	 hdl		, handle	, on		, off		, isOn */
  0, 			 nop_func	, NULL		, nop_func	, nop_func	, not_connected
};
static rtems_irq_prio irqPrioTable[BSP_IRQ_NUMBER]={
  /*
   * Processor exceptions handled as interrupts
   */
  0
};

  /*
   * This code assumes the exceptions management setup has already
   * been done. We just need to replace the exceptions that will
   * be handled like interrupt. On mcp750/mpc750 and many PPC processors
   * this means the decrementer exception and the external exception.
   */
void BSP_rtems_irq_mng_init(unsigned cpuId)
{
  int i;
  
  /*
   * First initialize the Interrupt management hardware
   */

  /*
   * Initialize Rtems management interrupt table
   */
    /*
     * re-init the rtemsIrq table
     */
    for (i = 0; i < BSP_IRQ_NUMBER; i++) {
      rtemsIrq[i]      = defaultIrq;
      rtemsIrq[i].name = i;
    }
    /*
     * Init initial Interrupt management config
     */
    initial_config.irqNb 	= BSP_IRQ_NUMBER;
    initial_config.defaultEntry = defaultIrq;
    initial_config.irqHdlTbl	= rtemsIrq;
    initial_config.irqBase	= BSP_LOWEST_OFFSET;
    initial_config.irqPrioTbl	= irqPrioTable;

    if (!BSP_rtems_irq_mngt_set(&initial_config)) {
      /*
       * put something here that will show the failure...
       */
      BSP_panic("Unable to initialize RTEMS interrupt Management!!! System locked\n");
    }
  
#ifdef TRACE_IRQ_INIT  
    printk("RTEMS IRQ management is now operationnal\n");
#endif
}