/*  FPGA.c -- Bridge for second and subsequent generations * *  COPYRIGHT (c) 1989-2001. *  On-Line Applications Research Corporation (OAR). * *  The license and distribution terms for this file may in *  the file LICENSE in this distribution or at *  http://www.rtems.com/license/LICENSE. * *  $Id:  */#include <bsp.h>#include <string.h>#include <fcntl.h>#include <assert.h>#include <rtems/libio.h>#include <rtems/libcsupport.h>/* *  initialize FPGA */void initialize_PCI_bridge (){#if (!SCORE603E_USE_DINK)  rtems_unsigned16 mask, shift, data;  shift = SCORE603E_85C30_0_IRQ - Score_IRQ_First;  mask = 1 << shift;  shift = SCORE603E_85C30_1_IRQ - Score_IRQ_First;  mask  = mask & (1 << shift);  data = *SCORE603E_FPGA_MASK_DATA;  data = ~mask;  *SCORE603E_FPGA_MASK_DATA = data;#endif}void set_irq_mask(  rtems_unsigned16 value){  rtems_unsigned16  *loc;  loc = (rtems_unsigned16  *)SCORE603E_FPGA_MASK_DATA;  *loc = value;}rtems_unsigned16 get_irq_mask(){  rtems_unsigned16  *loc;  rtems_unsigned16  value;  loc =  (rtems_unsigned16  *)SCORE603E_FPGA_MASK_DATA;  value = *loc;  return value;}void unmask_irq(   rtems_unsigned16 irq_idx){  rtems_unsigned16 value;  rtems_unsigned32 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(){  rtems_unsigned32 index;  rtems_unsigned32 i;#if (SCORE603E_USE_DINK)  set_irq_mask( 0xffff );#endif  /*   * 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;  }}rtems_unsigned16 read_and_clear_PMC_irq(  rtems_unsigned16    irq) {  rtems_unsigned16    status_word = irq;  status_word = (*BSP_PMC_STATUS_ADDRESS);  return status_word;}rtems_boolean Is_PMC_IRQ(  rtems_unsigned32   pmc_irq,  rtems_unsigned16   status_word){  rtems_boolean   result= FALSE;  switch(pmc_irq) {    case SCORE603E_85C30_4_IRQ:      result = Is_PMC_85C30_4_IRQ( status_word );      break;    case SCORE603E_85C30_2_IRQ:      result = Is_PMC_85C30_2_IRQ( status_word );      break;    case SCORE603E_85C30_5_IRQ:      result = Is_PMC_85C30_5_IRQ( status_word );      break;    case SCORE603E_85C30_3_IRQ:      result = Is_PMC_85C30_3_IRQ( status_word );      break;    default:      assert( 0 );      break;  }  return result;}rtems_unsigned16 read_and_clear_irq(){  rtems_unsigned16    irq;  irq = (*SCORE603E_FPGA_VECT_DATA);  if ((irq & 0xffff0) != 0x10) {    DEBUG_puts( "ERROR:: no irq data\n");        return (irq | 0x80);  }  irq &=0xf;  return irq;}