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/* irq.c
 *
 *  This file contains the implementation of the function described in irq.h
 *
 *  CopyRight (C) 2000 Canon Research France SA.
 *  Emmanuel Raguet,  mailto:raguet@crf.canon.fr
 *
 *  The license and distribution terms for this file may be
 *  found in found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  irq.c,v 1.2 2000/09/13 19:42:20 joel Exp
 */
 
 
#include <bsp.h>
#include <irq.h>
#include <registers.h>
#include <rtems/score/thread.h>
#include <rtems/score/apiext.h>
 
 
/*
 * This function check that the value given for the irq line
 * is valid.
 */
 
static int isValidInterrupt(int irq)
{
  if ( (irq < 0) || (irq > BSP_MAX_INT))
    return 0;
  return 1;
}
 
/*
 * ------------------------ RTEMS Single Irq Handler Mngt Routines ----------------
 */
 
int BSP_install_rtems_irq_handler  (const rtems_irq_connect_data* irq)
{
    rtems_irq_hdl *HdlTable;
    rtems_interrupt_level level;
 
    if (!isValidInterrupt(irq->name)) {
      return 0;
    }
    /*
     * Check if default handler is actually connected. If not issue an error.
     */
    HdlTable = (rtems_irq_hdl *) VECTOR_TABLE;
    if (*(HdlTable + irq->name) != default_int_handler) {
      return 0;
    }
 
    _CPU_ISR_Disable(level);
 
    /*
     * store the new handler
     */
    *(HdlTable + irq->name) = irq->hdl;
 
    /*
     * initialize the control register for the concerned interrupt
     */
    Regs[(INTCNTL0 + irq->name)] = (long)(irq->irqTrigger) | (long)(irq->irqLevel) ;
 
    /*
     * ack pending interrupt
     */
    Regs[INTACK] |= (long)(1 << irq->name);
 
    /*
     * unmask at INT controler level level
     */
    Regs[INTMASK] &= ~(long)(1 << irq->name);
 
    /*
     * Enable interrupt on device
     */
    irq->on(irq);
 
    _CPU_ISR_Enable(level);
 
    return 1;
}
 
int BSP_remove_rtems_irq_handler  (const rtems_irq_connect_data* irq)
{
    rtems_irq_hdl *HdlTable;
    rtems_interrupt_level level;
 
    if (!isValidInterrupt(irq->name)) {
      return 0;
    }
    /*
     * Check if the handler is actually connected. If not issue an error.
     */
    HdlTable = (rtems_irq_hdl *) VECTOR_TABLE;
    if (*(HdlTable + irq->name) != irq->hdl) {
      return 0;
    }
    _CPU_ISR_Disable(level);
 
    /*
     * mask at INT controller level
     */
    Regs[INTMASK] |= (long)(1 << irq->name);
 
    /*
     * Disable interrupt on device
     */
    irq->off(irq);
 
    /*
     * restore the default irq value
     */
    *(HdlTable + irq->name) = default_int_handler;
 
    _CPU_ISR_Enable(level);
 
    return 1;
}
 
 
 
void _ThreadProcessSignalsFromIrq (CPU_Exception_frame* ctx)
{
  /*
   * Process pending signals that have not already been
   * processed by _Thread_Displatch. This happens quite
   * unfrequently : the ISR must have posted an action
   * to the current running thread.
   */
  if ( _Thread_Do_post_task_switch_extension ||
       _Thread_Executing->do_post_task_switch_extension ) {
    _Thread_Executing->do_post_task_switch_extension = FALSE;
    _API_extensions_Run_postswitch();
  }
}

Line No.	Rev	Author	Line
1	1026	ivang	`/* irq.c`
2			`*`
3			`* This file contains the implementation of the function described in irq.h`
4			`*`
5			`* CopyRight (C) 2000 Canon Research France SA.`
6			`* Emmanuel Raguet, mailto:raguet@crf.canon.fr`
7			`*`
8			`* The license and distribution terms for this file may be`
9			`* found in found in the file LICENSE in this distribution or at`
10			`* http://www.OARcorp.com/rtems/license.html.`
11			`*`
12			`* irq.c,v 1.2 2000/09/13 19:42:20 joel Exp`
13			`*/`
14
15
16			`#include <bsp.h>`
17			`#include <irq.h>`
18			`#include <registers.h>`
19			`#include <rtems/score/thread.h>`
20			`#include <rtems/score/apiext.h>`
21
22
23			`/*`
24			`* This function check that the value given for the irq line`
25			`* is valid.`
26			`*/`
27
28			`static int isValidInterrupt(int irq)`
29			`{`
30			`if ( (irq < 0) \|\| (irq > BSP_MAX_INT))`
31			`return 0;`
32			`return 1;`
33			`}`
34
35			`/*`
36			`* ------------------------ RTEMS Single Irq Handler Mngt Routines ----------------`
37			`*/`
38
39			`int BSP_install_rtems_irq_handler (const rtems_irq_connect_data* irq)`
40			`{`
41			`rtems_irq_hdl *HdlTable;`
42			`rtems_interrupt_level level;`
43
44			`if (!isValidInterrupt(irq->name)) {`
45			`return 0;`
46			`}`
47			`/*`
48			`* Check if default handler is actually connected. If not issue an error.`
49			`*/`
50			`HdlTable = (rtems_irq_hdl *) VECTOR_TABLE;`
51			`if (*(HdlTable + irq->name) != default_int_handler) {`
52			`return 0;`
53			`}`
54
55			`_CPU_ISR_Disable(level);`
56
57			`/*`
58			`* store the new handler`
59			`*/`
60			`*(HdlTable + irq->name) = irq->hdl;`
61
62			`/*`
63			`* initialize the control register for the concerned interrupt`
64			`*/`
65			`Regs[(INTCNTL0 + irq->name)] = (long)(irq->irqTrigger) \| (long)(irq->irqLevel) ;`
66
67			`/*`
68			`* ack pending interrupt`
69			`*/`
70			`Regs[INTACK] \|= (long)(1 << irq->name);`
71
72			`/*`
73			`* unmask at INT controler level level`
74			`*/`
75			`Regs[INTMASK] &= ~(long)(1 << irq->name);`
76
77			`/*`
78			`* Enable interrupt on device`
79			`*/`
80			`irq->on(irq);`
81
82			`_CPU_ISR_Enable(level);`
83
84			`return 1;`
85			`}`
86
87			`int BSP_remove_rtems_irq_handler (const rtems_irq_connect_data* irq)`
88			`{`
89			`rtems_irq_hdl *HdlTable;`
90			`rtems_interrupt_level level;`
91
92			`if (!isValidInterrupt(irq->name)) {`
93			`return 0;`
94			`}`
95			`/*`
96			`* Check if the handler is actually connected. If not issue an error.`
97			`*/`
98			`HdlTable = (rtems_irq_hdl *) VECTOR_TABLE;`
99			`if (*(HdlTable + irq->name) != irq->hdl) {`
100			`return 0;`
101			`}`
102			`_CPU_ISR_Disable(level);`
103
104			`/*`
105			`* mask at INT controller level`
106			`*/`
107			`Regs[INTMASK] \|= (long)(1 << irq->name);`
108
109			`/*`
110			`* Disable interrupt on device`
111			`*/`
112			`irq->off(irq);`
113
114			`/*`
115			`* restore the default irq value`
116			`*/`
117			`*(HdlTable + irq->name) = default_int_handler;`
118
119			`_CPU_ISR_Enable(level);`
120
121			`return 1;`
122			`}`
123
124
125
126			`void _ThreadProcessSignalsFromIrq (CPU_Exception_frame* ctx)`
127			`{`
128			`/*`
129			`* Process pending signals that have not already been`
130			`* processed by _Thread_Displatch. This happens quite`
131			`* unfrequently : the ISR must have posted an action`
132			`* to the current running thread.`
133			`*/`
134			`if ( _Thread_Do_post_task_switch_extension \|\|`
135			`_Thread_Executing->do_post_task_switch_extension ) {`
136			`_Thread_Executing->do_post_task_switch_extension = FALSE;`
137			`_API_extensions_Run_postswitch();`
138			`}`
139			`}`

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[/] [or1k/] [trunk/] [rtems-20020807/] [c/] [src/] [lib/] [libbsp/] [arm/] [vegaplus/] [irq/] [irq.c] - Blame information for rev 1765