source: rtems/bsps/powerpc/psim/irq/irq_init.c @ 99de42c

Last change on this file since 99de42c was 99de42c, checked in by Marçal Comajoan Cara <mcomajoancara@…>, on Dec 4, 2018 at 10:05:10 PM

Capitalize Rtems to RTEMS

  • Property mode set to 100644
File size: 3.1 KB
Line 
1/*
2 *  This file contains the implementation of rtems initialization
3 *  related to interrupt handling
4 */
5
6/*
7 *  Copyright (C) 1999 valette@crf.canon.fr
8 *
9 *  Enhanced by Jay Kulpinski <jskulpin@eng01.gdds.com>
10 *  to make it valid for MVME2300 Motorola boards.
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.org/license/LICENSE.
15 */
16
17#include <libcpu/io.h>
18#include <libcpu/spr.h>
19#include <bsp/irq.h>
20#include <bsp.h>
21#include <psim.h>
22#include <bsp/vectors.h>
23#include <rtems/bspIo.h>
24#include <bsp/openpic.h>
25#include <bsp/irq-generic.h>
26
27static rtems_irq_connect_data      rtemsIrq[BSP_IRQ_NUMBER];
28static rtems_irq_global_settings   initial_config;
29static rtems_irq_connect_data      defaultIrq = {
30  /* vectorIdex, hdl  , handle  , on  , off , isOn */
31      0,          NULL, NULL    , NULL, NULL, NULL
32};
33static rtems_irq_prio irqPrioTable[BSP_IRQ_NUMBER]={
34  /*
35   * Processor exceptions handled as interrupts
36   */
37  0
38};
39
40  /*
41   * This code assumes the exceptions management setup has already
42   * been done. We just need to replace the exceptions that will
43   * be handled like interrupt. On mcp750/mpc750 and many PPC processors
44   * this means the decrementer exception and the external exception.
45   */
46void BSP_rtems_irq_mng_init(unsigned cpuId)
47{
48  int i;
49
50  /*
51   * First initialize the Interrupt management hardware
52   */
53  OpenPIC = (void*)PSIM.OpenPIC;
54  openpic_init(1,0,0,16,0,0);
55
56  /*
57   * Initialize RTEMS management interrupt table
58   */
59  /*
60   * re-init the rtemsIrq table
61   */
62  for (i = 0; i < BSP_IRQ_NUMBER; i++) {
63    rtemsIrq[i]      = defaultIrq;
64    rtemsIrq[i].name = i;
65  }
66  /*
67   * Init initial Interrupt management config
68   */
69  initial_config.irqNb        = BSP_IRQ_NUMBER;
70  initial_config.defaultEntry = defaultIrq;
71  initial_config.irqHdlTbl    = rtemsIrq;
72  initial_config.irqBase      = BSP_LOWEST_OFFSET;
73  initial_config.irqPrioTbl   = irqPrioTable;
74
75  for (i = BSP_PCI_IRQ_LOWEST_OFFSET; i< BSP_PCI_IRQ_NUMBER; i++ ) {
76        irqPrioTable[i] = 8;
77  }
78
79  if (!BSP_rtems_irq_mngt_set(&initial_config)) {
80    /*
81     * put something here that will show the failure...
82     */
83    rtems_panic(
84      "Unable to initialize RTEMS interrupt Management!!! System locked\n"
85    );
86  }
87
88  #ifdef TRACE_IRQ_INIT
89    printk("RTEMS IRQ management is now operationnal\n");
90  #endif
91}
92
93static int psim_exception_handler(
94  BSP_Exception_frame *frame,
95  unsigned exception_number
96)
97{
98  rtems_panic("Unexpected interrupt occured");
99  return 0;
100}
101
102/*
103 * functions to enable/disable a source at the ipic
104 */
105void bsp_interrupt_vector_enable( rtems_vector_number irqnum)
106{
107  /* FIXME: do something */
108  bsp_interrupt_assert(bsp_interrupt_is_valid_vector(irqnum));
109}
110
111void bsp_interrupt_vector_disable( rtems_vector_number irqnum)
112{
113  /* FIXME: do something */
114  bsp_interrupt_assert(bsp_interrupt_is_valid_vector(irqnum));
115}
116
117rtems_status_code bsp_interrupt_facility_initialize(void)
118{
119  /* Install exception handler */
120  if (ppc_exc_set_handler( ASM_EXT_VECTOR, psim_exception_handler)) {
121    return RTEMS_IO_ERROR;
122  }
123 
124  return RTEMS_SUCCESSFUL;
125}
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