source: rtems/bsps/powerpc/beatnik/irq/irq_init.c @ 0446f680

/* 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.
 *
 * Modified by T. Straumann for the 'beatnik' BSP.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */

#include <rtems.h>
#include <bsp.h>
#include <bsp/irq.h>
#include <bsp/vectors.h>
#include <rtems/bspIo.h>

#if 0
#include <libcpu/io.h>
#include <libcpu/spr.h>
#include <bsp/pci.h>
#include <bsp/residual.h>
#include <bsp/openpic.h>
#include <bsp/irq.h>
#include <bsp.h>
#include <bsp/motorola.h>
#endif

/*
#define SHOW_ISA_PCI_BRIDGE_SETTINGS
*/

extern unsigned int external_exception_vector_prolog_code_size[];
extern void external_exception_vector_prolog_code(void);
extern unsigned int decrementer_exception_vector_prolog_code_size[];
extern void decrementer_exception_vector_prolog_code(void);

/*
 * default handler
 */
static void nop_func(void *arg){}

static rtems_irq_connect_data           rtemsIrq[BSP_IRQ_NUMBER];
static rtems_irq_global_settings    initial_config;
static rtems_irq_prio                           rtemsPrioTbl[BSP_IRQ_NUMBER];
static rtems_irq_connect_data           defaultIrq = {
  name:   0,
  hdl:    nop_func,
  handle: 0,
  on:     0,
  off:    0,
  isOn:   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 = BSP_LOWEST_OFFSET; i <= BSP_MAX_OFFSET; i++) {
                rtemsIrq[i]      = defaultIrq;
                rtemsIrq[i].name = i;
                rtemsPrioTbl[i]  = BSP_IRQ_DEFAULT_PRIORITY;
        }

        /*
         * 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       = rtemsPrioTbl;

        if (!BSP_rtems_irq_mngt_set(&initial_config)) {
                /*
                 * put something here that will show the failure...
                 */
                rtems_panic("Unable to initialize RTEMS interrupt Management!!! System locked\n");
        }

#ifdef TRACE_IRQ_INIT  
        printk("RTEMS IRQ management is now operationnal\n");
#endif
}