source: rtems/c/src/lib/libbsp/powerpc/mvme5500/irq/irq_init.c @ 6771a9e7

4.104.114.9
Last change on this file since 6771a9e7 was 6771a9e7, checked in by Ralf Corsepius <ralf.corsepius@…>, on Aug 20, 2008 at 9:00:11 AM

Add missing prototypes.

  • Property mode set to 100644
File size: 4.4 KB
Line 
1/* irq_init.c
2 *
3 * This file contains the implementation of rtems initialization
4 * related to interrupt handling.
5 *
6 * CopyRight (C) 1999 valette@crf.canon.fr
7 *
8 * Modified and added support for the MVME5500.
9 * Copyright 2003, 2004, 2005, Brookhaven National Laboratory and
10 *                 Shuchen Kate Feng <feng1@bnl.gov>
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.com/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 <libcpu/raw_exception.h>  /* ASM_EXT_VECTOR, ASM_DEC_VECTOR ... */
22/*#define  TRACE_IRQ_INIT*/
23
24/*
25 * default on/off function
26 */
27static void nop_func(void){}
28/*
29 * default isOn function
30 */
31static int not_connected(void) {return 0;}
32/*
33 * default possible isOn function
34 */
35static int connected(void) {return 1;}
36
37static rtems_irq_connect_data           rtemsIrq[BSP_IRQ_NUMBER];
38static rtems_irq_global_settings        initial_config;
39static rtems_irq_connect_data           defaultIrq = {
40  /* vectorIdex,         hdl      , handle      , on            , off           , isOn */
41  0,                     nop_func  , NULL       , nop_func      , nop_func      , not_connected
42};
43
44rtems_irq_prio BSPirqPrioTable[BSP_PIC_IRQ_NUMBER]={
45  /*
46   * This table is where the developers can change the levels of priority
47   * based on the need of their applications.
48   *
49   * actual priorities for CPU MAIN and GPP interrupts (0-95)
50   *
51   *    0   means that only current interrupt is masked (lowest priority)
52   *    255 is only used by bits 24, 25, 26 and 27 of the CPU high
53   *        interrupt Mask: (e.g. GPP7_0, GPP15_8, GPP23_16, GPP31_24).
54   *        The IRQs of those four bits are always enabled. When it's used,
55   *        the IRQ number is never listed in the dynamic picIsrTable[96].
56   *
57   *        The priorities of GPP interrupts were decided by their own
58   *        value set at  BSPirqPrioTable.
59   *           
60   */
61  /* CPU Main cause low interrupt */
62  /* 0-15 */
63  0, 0, 0, 0, 0, 0, 0, 0, 64/*Timer*/, 0, 0, 0, 0, 0, 0, 0,
64   /* 16-31 */
65  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
66  /* CPU Main cause high interrupt */
67  /* 32-47 */
68  2/*10/100MHZ*/, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
69  /* 48-63 */
70  0, 0, 0, 0, 0, 0, 0, 0, 
71  255 /*GPP0-7*/, 255/*GPP8-15*/, 255/*GPP16-23*/, 255/*GPP24-31*/, 0, 0, 0, 0,
72  /* GPP interrupts */
73  /* GPP0-7 */
74  1/*serial*/,0, 0, 0, 0, 0, 0, 0,
75  /* GPP8-15 */
76  47/*PMC1A*/,46/*PMC1B*/,45/*PMC1C*/,44/*PMC1D*/,30/*VME0*/, 29/*VME1*/,3,1,
77  /* GPP16-23 */
78  37/*PMC2A*/,36/*PMC2B*/,35/*PMC2C*/,34/*PMC2D*/,23/*1GHZ*/, 0,0,0, 
79  /* GPP24-31 */
80  7/*watchdog*/, 0,0,0,0,0,0,0
81};
82
83/*
84 * This code assumes the exceptions management setup has already
85 * been done. We just need to replace the exceptions that will
86 * be handled like interrupt. On MPC7455 and many PPC processors
87 * this means the decrementer exception and the external exception.
88 */
89void BSP_rtems_irq_mng_init(unsigned cpuId)
90{
91  int                   i;
92  rtems_interrupt_level l;
93
94  /*
95   * First initialize the Interrupt management hardware
96   */
97#ifdef TRACE_IRQ_INIT 
98  printk("Initializing the interrupt controller of the GT64260\n");
99#endif       
100
101#ifdef TRACE_IRQ_INIT 
102  printk("Going to re-initialize the rtemsIrq table %d\n",BSP_IRQ_NUMBER);
103#endif       
104  /*
105   * Initialize Rtems management interrupt table
106   */
107  /*
108   * re-init the rtemsIrq table
109   */
110  for (i = 0; i < BSP_IRQ_NUMBER; i++) {
111    rtemsIrq[i]      = defaultIrq;   
112    rtemsIrq[i].name = i;
113  }
114
115  /*
116   * Init initial Interrupt management config
117   */
118  initial_config.irqNb  = BSP_IRQ_NUMBER;
119  initial_config.defaultEntry   = defaultIrq;
120  initial_config.irqHdlTbl      = rtemsIrq;
121  initial_config.irqBase        = BSP_LOWEST_OFFSET;
122  initial_config.irqPrioTbl     = BSPirqPrioTable;
123
124#ifdef TRACE_IRQ_INIT 
125  printk("Going to setup irq mngt configuration\n");
126#endif       
127
128  rtems_interrupt_disable(l);
129  if (!BSP_rtems_irq_mngt_set(&initial_config)) {
130      /*
131       * put something here that will show the failure...
132       */
133      BSP_panic("Unable to initialize RTEMS interrupt Management!!! System locked\n");
134  }
135#ifdef TRACE_IRQ_INIT 
136  printk("Done setup irq mngt configuration\n");
137#endif
138 
139  /* I don't really understand why all sources are enable here... (T.S) */
140  for (i= BSP_MAIN_GPP7_0_IRQ; i <= BSP_MAIN_GPP31_24_IRQ; i++) 
141      BSP_enable_pic_irq(i);
142
143  rtems_interrupt_enable(l);
144
145#ifdef TRACE_IRQ_INIT 
146  printk("RTEMS IRQ management is now operationnal\n");
147#endif
148}
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