source: rtems/c/src/lib/libbsp/i960/cvme961/startup/setvec.c @ f7fa7d7

4.104.114.84.95
Last change on this file since f7fa7d7 was 98e4ebf, checked in by Joel Sherrill <joel.sherrill@…>, on Oct 8, 1997 at 3:45:54 PM

Fixed typo in the pointer to the license terms.

  • Property mode set to 100644
File size: 5.5 KB
Line 
1/*  set_vector
2 *
3 *  This routine attempts to perform all "generic" interrupt initialization
4 *  for the specified XINT line.  It is specific to the Cyclone CVME961 in
5 *  that it knows which interrupts are initialized by the monitor, the
6 *  characteristics of XINT5 (VIC068 clock tick), and that it assumes the
7 *  i960 is processing interrupts in dedicated mode.  It attempts to map
8 *  XINTs to interrupt vectors in a fairly straght forward way.
9 *
10 *         XINT   USE          VECTOR INTR TBL INDEX TRIGGERED
11 *         ==== =============  ====== ============== =========
12 *          0   VMEbus ERROR    0x02       0x03        EDGE
13 *          1   DRAM PARITY     0x12       0x13        EDGE
14 *          2   Z8530           0x22       0x23        LEVEL
15 *          3   SQUALL 0        0x52       0x53        ----
16 *          4   Z8536 (SQSIO4)  0x72       0x73        LEVEL
17 *          5   TICK            0x32       0x33        EDGE
18 *          6   VIC068          0x62       0x63        LEVEL
19 *          7   UNUSED          0x42       0x43        LEVEL
20 *
21 *  The interrupt handler is installed in both the cached and memory
22 *  resident interrupt tables.  The appropriate IMAP register is updated to
23 *  reflect the vector selected by this routine.  Global interrupts are
24 *  enabled. If XINT5 is being installed, places it in trigger mode.
25 *  Finally, set_vector_support() is invoked to install the new IMAP and
26 *  ICON, unmask the XINT in IMASK, and lower the i960's interrupt
27 *  level to 0.
28 *
29 *  INPUT:
30 *    func  - interrupt handler entry point
31 *    xint  - external interrupt line
32 *    type  - 0 indicates raw hardware connect
33 *            1 indicates RTEMS interrupt connect
34 *
35 *  RETURNS:
36 *    address of previous interrupt handler
37 *
38 *  COPYRIGHT (c) 1989-1997.
39 *  On-Line Applications Research Corporation (OAR).
40 *  Copyright assigned to U.S. Government, 1994.
41 *
42 *  The license and distribution terms for this file may be
43 *  found in the file LICENSE in this distribution or at
44 *  http://www.OARcorp.com/rtems/license.html.
45 *
46 *  $Id$
47 */
48
49#include <rtems.h>
50#include <bsp.h>
51
52#include <stdio.h>
53
54void print_prcb();
55void print_intr_info();
56void print_ipnd_imsk();
57
58unsigned int Xint_2_Group_Map[8] = { 0, 1, 2, 5, 7, 3, 6, 4 };
59
60i960_isr_entry set_vector(                 /* returns old vector */
61  rtems_isr_entry func,                    /* isr routine */
62  unsigned int    xint,                    /* XINT number */
63  unsigned int    type                     /* RTEMS or RAW */
64)
65{
66  i960_isr_entry  *intr_tbl, *cached_intr_tbl;
67  i960_isr_entry   saved_intr;
68  unsigned int     vector, group, nibble;
69  unsigned int    *imap;
70
71  if ( xint > 7 )
72    exit( 0x80 );
73
74  cached_intr_tbl = (i960_isr_entry *) 0;
75  intr_tbl        = (i960_isr_entry *) Prcb->intr_tbl;
76  group           = Xint_2_Group_Map[xint];  /* remap XINT to group */
77  vector          = (group << 4) + 2;        /* direct vector num   */
78
79  if ( type )
80    rtems_interrupt_catch( func, vector, (rtems_isr_entry *) &saved_intr );
81  else {
82    saved_intr    = (i960_isr_entry) intr_tbl[ vector ];
83                                                   /* return old vector   */
84    intr_tbl[ vector + 1 ]   =                     /* normal vector table */
85    cached_intr_tbl[ group ] = (i960_isr_entry) func;    /* cached vector */
86  }
87
88  if       ( xint <= 3 ) imap = &Ctl_tbl->imap0;  /* updating IMAP0 */
89  else                   imap = &Ctl_tbl->imap1;  /* updating IMAP1 */
90  nibble = (xint % 4) * 4;
91  *imap &= ~(0xf << nibble);
92  *imap |= group << nibble;
93
94  Ctl_tbl->icon &= ~0x00000400;        /* enable global interrupts */
95  Ctl_tbl->icon |=  0x00004000;        /* fast sampling mode       */
96  switch ( xint ) {
97    case 0:   Ctl_tbl->icon |=  0x00000004;  break;
98    case 1:   Ctl_tbl->icon |=  0x00000008;  break;
99    case 2:   Ctl_tbl->icon &= ~0x00000010;  break;
100    case 4:   Ctl_tbl->icon &= ~0x00000040;  break;
101    case 5:   Ctl_tbl->icon |=  0x00000080;  break;
102    case 6:   Ctl_tbl->icon &= ~0x00000100;  break;
103    default:  exit( 0x81 );                  break; /* unsupported  */
104  }
105
106  if ( xint == 4 ) {                   /* reprogram MCON for SQSIO4 */
107    Ctl_tbl->mcon12 = 0x00002012;      /* MCON12 - 0xCxxxxxxx       */
108    Ctl_tbl->mcon13 = 0x00000000;      /* MCON13 - 0xDxxxxxxx       */
109    i960_reload_ctl_group( 5 );        /* update MCON12-MCON15      */
110  }
111
112  i960_unmask_intr( xint );            /* update IMSK               */
113  i960_reload_ctl_group( 1 );          /* update IMAP?/ICON         */
114  return( saved_intr );                /* return old vector         */
115}
116
117void print_prcb()
118{
119  printf( "fault_table  =0x%p\n", Prcb->fault_tbl );
120  printf( "control_tbl  =0x%p\n", Prcb->control_tbl );
121  printf( "AC mask ov   =0x%x\n", Prcb->initial_ac );
122  printf( "fltconfig    =0x%x\n", Prcb->fault_config );
123  printf( "intr tbl     =0x%p\n", Prcb->intr_tbl );
124  printf( "systable     =0x%p\n", Prcb->sys_proc_tbl );
125  printf( "reserved     =0x%x\n", Prcb->reserved );
126  printf( "isr stk      =0x%p\n", Prcb->intr_stack );
127  printf( "ins cache    =0x%x\n", Prcb->ins_cache_cfg );
128  printf( "reg cache    =0x%x\n", Prcb->reg_cache_cfg );
129}
130
131void print_intr_info()
132{
133  printf( "prcb =0x%p\n",    Prcb );
134  printf( "ctl_tbl =0x%p\n", Ctl_tbl );
135  printf( "intr_tbl=0x%p\n", Prcb->intr_tbl );
136  printf( "IMAP0 = 0x%x\n",  Ctl_tbl->imap0 );
137  printf( "IMAP1 = 0x%x\n",  Ctl_tbl->imap1 );
138  print_ipnd_imsk();
139}
140
141void print_ipnd_imsk()
142{
143  printf(" IPEND = 0x%x\n", i960_pend_intrs() );
144  printf(" IMASK = 0x%x\n", i960_mask_intrs() );
145}
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