source: rtems/c/src/lib/libbsp/powerpc/score603e/irq/FPGA.c @ 0626dba

/*  FPGA.c -- Bridge for second and subsequent generations
 *
 *  COPYRIGHT (c) 1989-2009.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  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 <bsp.h>
#include <bsp/irq.h>
#include <string.h>
#include <fcntl.h>
#include <assert.h>

#include <rtems/libio.h>
#include <rtems/libcsupport.h>
#include <rtems/bspIo.h>

/*
 *  initialize FPGA
 */
void initialize_PCI_bridge (void)
{
  /* Note: Accept DINKs setup of the PCI Bridge and don't
   *       change anything.
   */
}

void set_irq_mask(
  uint16_t         value
)
{
  volatile uint16_t   *loc;

  loc = (uint16_t*)SCORE603E_FPGA_MASK_DATA;

  *loc = value;
}

uint16_t get_irq_mask( void )
{
  volatile uint16_t  *loc;
  uint16_t            value;

  loc =  (uint16_t*)SCORE603E_FPGA_MASK_DATA;

  value = *loc;

  return value;
}

void mask_irq(
  uint16_t         irq_idx
)
{
  uint16_t         value;
  uint32_t         mask_idx = irq_idx;

  value = get_irq_mask();

#if (HAS_PMC_PSC8)
  switch (irq_idx + Score_IRQ_First ) {
    case SCORE603E_85C30_4_IRQ:
    case SCORE603E_85C30_2_IRQ:
    case SCORE603E_85C30_5_IRQ:
    case SCORE603E_85C30_3_IRQ:
      mask_idx = SCORE603E_PCI_IRQ_0 - Score_IRQ_First;
      break;
    default:
      break;
  }
#endif

  value |= (0x1 << mask_idx);
  set_irq_mask( value );
}

void unmask_irq(
  uint16_t         irq_idx
)
{
  uint16_t         value;
  uint32_t         mask_idx = irq_idx;

  value = get_irq_mask();

#if (HAS_PMC_PSC8)
  switch (irq_idx + Score_IRQ_First ) {
    case SCORE603E_85C30_4_IRQ:
    case SCORE603E_85C30_2_IRQ:
    case SCORE603E_85C30_5_IRQ:
    case SCORE603E_85C30_3_IRQ:
      mask_idx = SCORE603E_PCI_IRQ_0 - Score_IRQ_First;
      break;
    default:
      break;
  }
#endif

  value &= (~(0x1 << mask_idx));
  set_irq_mask( value );
}

void init_irq_data_register(void)
{
  uint32_t         index;
  uint32_t         i;

  set_irq_mask( 0xffff );

  /*
   * Clear any existing interupts from the vector data register.
   */
  for (i=0; i<20; i++) {
    index =  (*SCORE603E_FPGA_VECT_DATA);
    if ( (index&0x10) != 0x10 )
      break;
  }
}

uint16_t         read_and_clear_PMC_irq(
  uint16_t            irq
)
{
  uint16_t   status_word = irq;

  status_word = (*BSP_PMC_STATUS_ADDRESS);

  return status_word;
}

bool Is_PMC_IRQ(
  uint32_t           pmc_irq,
  uint16_t           status_word
)
{
  bool result = false;

  switch(pmc_irq) {
    case SCORE603E_85C30_4_IRQ:
      result = Is_PMC_85C30_4_IRQ( status_word ) ? true : false;
      break;
    case SCORE603E_85C30_2_IRQ:
      result = Is_PMC_85C30_2_IRQ( status_word ) ? true : false;
      break;
    case SCORE603E_85C30_5_IRQ:
      result = Is_PMC_85C30_5_IRQ( status_word ) ? true : false;
      break;
    case SCORE603E_85C30_3_IRQ:
      result = Is_PMC_85C30_3_IRQ( status_word ) ? true : false;
      break;
    default:
      assert( 0 );
      break;
  }

  return result;
}

uint16_t         read_and_clear_irq(void)
{
  uint16_t            irq;


  irq = (*SCORE603E_FPGA_VECT_DATA);
  Processor_Synchronize();
  if ((irq & 0xffff0) != 0x10) {
    printk( "read_and_clear_irq:: ERROR==>no irq data 0x%x\n", irq);
    return (irq | 0x80);
  }

  irq &=0xf;
  irq += Score_IRQ_First;
  return irq;
}