Subversion Repositories openrisc_2011-10-31

/*  set_vector

 *

 *  This routine attempts to perform all "generic" interrupt initialization

 *  for the specified XINT line.  It is specific to the Cyclone CVME961 in

 *  that it knows which interrupts are initialized by the monitor, the

 *  characteristics of XINT5 (VIC068 clock tick), and that it assumes the

 *  i960 is processing interrupts in dedicated mode.  It attempts to map

 *  XINTs to interrupt vectors in a fairly straght forward way.

 *

 *         XINT   USE          VECTOR INTR TBL INDEX TRIGGERED

 *         ==== =============  ====== ============== =========

 *          0   VMEbus ERROR    0x02       0x03        EDGE

 *          1   DRAM PARITY     0x12       0x13        EDGE

 *          2   Z8530           0x22       0x23        LEVEL

 *          3   SQUALL 0        0x52       0x53        ----

 *          4   Z8536 (SQSIO4)  0x72       0x73        LEVEL

 *          5   TICK            0x32       0x33        EDGE

 *          6   VIC068          0x62       0x63        LEVEL

 *          7   UNUSED          0x42       0x43        LEVEL

 *

 *  The interrupt handler is installed in both the cached and memory

 *  resident interrupt tables.  The appropriate IMAP register is updated to

 *  reflect the vector selected by this routine.  Global interrupts are

 *  enabled. If XINT5 is being installed, places it in trigger mode.

 *  Finally, set_vector_support() is invoked to install the new IMAP and

 *  ICON, unmask the XINT in IMASK, and lower the i960's interrupt

 *  level to 0.

 *

 *  INPUT:

 *    func  - interrupt handler entry point

 *    xint  - external interrupt line

 *    type  - 0 indicates raw hardware connect

 *            1 indicates RTEMS interrupt connect

 *

 *  RETURNS:

 *    address of previous interrupt handler

 *

 *  COPYRIGHT (c) 1989-1999.

 *  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.OARcorp.com/rtems/license.html.

 *

 *  $Id: setvec.c,v 1.2 2001-09-27 11:59:57 chris Exp $

 */

#include <rtems.h>

#include <bsp.h>

#include <stdio.h>

void print_prcb();

void print_intr_info();

void print_ipnd_imsk();

unsigned int Xint_2_Group_Map[8] = { 0, 1, 2, 5, 7, 3, 6, 4 };

i960_isr_entry set_vector(                 /* returns old vector */

  rtems_isr_entry func,                    /* isr routine */

  unsigned int    xint,                    /* XINT number */

  unsigned int    type                     /* RTEMS or RAW */

)

{

  i960_isr_entry  *intr_tbl, *cached_intr_tbl;

  i960_isr_entry   saved_intr;

  unsigned int     vector, group, nibble;

  unsigned int    *imap;

  if ( xint > 7 )

    exit( 0x80 );

  cached_intr_tbl = (i960_isr_entry *) 0;

  intr_tbl        = (i960_isr_entry *) Prcb->intr_tbl;

  group           = Xint_2_Group_Map[xint];  /* remap XINT to group */

  vector          = (group << 4) + 2;        /* direct vector num   */

  if ( type )

    rtems_interrupt_catch( func, vector, (rtems_isr_entry *) &saved_intr );

  else {

    saved_intr    = (i960_isr_entry) intr_tbl[ vector ];

                                                   /* return old vector   */

    intr_tbl[ vector + 1 ]   =                     /* normal vector table */

    cached_intr_tbl[ group ] = (i960_isr_entry) func;    /* cached vector */

  }

  if       ( xint <= 3 ) imap = &Ctl_tbl->imap0;  /* updating IMAP0 */

  else                   imap = &Ctl_tbl->imap1;  /* updating IMAP1 */

  nibble = (xint % 4) * 4;

  *imap &= ~(0xf << nibble);

  *imap |= group << nibble;

  Ctl_tbl->icon &= ~0x00000400;        /* enable global interrupts */

  Ctl_tbl->icon |=  0x00004000;        /* fast sampling mode       */

  switch ( xint ) {

    case 0:   Ctl_tbl->icon |=  0x00000004;  break;

    case 1:   Ctl_tbl->icon |=  0x00000008;  break;

    case 2:   Ctl_tbl->icon &= ~0x00000010;  break;

    case 4:   Ctl_tbl->icon &= ~0x00000040;  break;

    case 5:   Ctl_tbl->icon |=  0x00000080;  break;

    case 6:   Ctl_tbl->icon &= ~0x00000100;  break;

    default:  exit( 0x81 );                  break; /* unsupported  */

  }

  if ( xint == 4 ) {                   /* reprogram MCON for SQSIO4 */

    Ctl_tbl->mcon12 = 0x00002012;      /* MCON12 - 0xCxxxxxxx       */

    Ctl_tbl->mcon13 = 0x00000000;      /* MCON13 - 0xDxxxxxxx       */

    i960_reload_ctl_group( 5 );        /* update MCON12-MCON15      */

  }

  i960_unmask_intr( xint );            /* update IMSK               */

  i960_reload_ctl_group( 1 );          /* update IMAP?/ICON         */

  return( saved_intr );                /* return old vector         */

}

void print_prcb()

{

  printf( "fault_table  =0x%p\n", Prcb->fault_tbl );

  printf( "control_tbl  =0x%p\n", Prcb->control_tbl );

  printf( "AC mask ov   =0x%x\n", Prcb->initial_ac );

  printf( "fltconfig    =0x%x\n", Prcb->fault_config );

  printf( "intr tbl     =0x%p\n", Prcb->intr_tbl );

  printf( "systable     =0x%p\n", Prcb->sys_proc_tbl );

  printf( "reserved     =0x%x\n", Prcb->reserved );

  printf( "isr stk      =0x%p\n", Prcb->intr_stack );

  printf( "ins cache    =0x%x\n", Prcb->ins_cache_cfg );

  printf( "reg cache    =0x%x\n", Prcb->reg_cache_cfg );

}

void print_intr_info()

{

  printf( "prcb =0x%p\n",    Prcb );

  printf( "ctl_tbl =0x%p\n", Ctl_tbl );

  printf( "intr_tbl=0x%p\n", Prcb->intr_tbl );

  printf( "IMAP0 = 0x%x\n",  Ctl_tbl->imap0 );

  printf( "IMAP1 = 0x%x\n",  Ctl_tbl->imap1 );

  print_ipnd_imsk();

}

void print_ipnd_imsk()

{

  printf(" IPEND = 0x%x\n", i960_pend_intrs() );

  printf(" IMASK = 0x%x\n", i960_mask_intrs() );

}