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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [efi332/] [clock/] [ckinit.c] - Blame information for rev 173

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/*  Clock_init()
 *
 *  This routine initailizes the periodic interrupt timer on
 *  the Motorola 68332.
 *
 *  Input parameters:  NONE
 *
 *  Output parameters:  NONE
 *
 *  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: ckinit.c,v 1.2 2001-09-27 12:00:01 chris Exp $
 */
 
#include <stdlib.h>
#include <bsp.h>
#include <rtems/libio.h>
#include <efi332.h>
 
#define CLOCK_VECTOR   EFI_PIV
 
rtems_unsigned32 Clock_isrs;        /* ISRs until next tick */
volatile rtems_unsigned32 Clock_driver_ticks;
                                    /* ticks since initialization */
rtems_isr_entry  Old_ticker;
 
void Clock_exit( void );
 
/*
 * These are set by clock driver during its init
 */
 
rtems_device_major_number rtems_clock_major = ~0;
rtems_device_minor_number rtems_clock_minor;
 
rtems_isr Clock_isr(rtems_vector_number vector)
{
  Clock_driver_ticks += 1;
 
  if ( Clock_isrs == 1 ) {
    rtems_clock_tick();
    Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;
  }
  else
    Clock_isrs -= 1;
}
 
void Install_clock(
  rtems_isr_entry clock_isr
)
{
  Clock_driver_ticks = 0;
  Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;
 
  Old_ticker = (rtems_isr_entry) set_vector( clock_isr, CLOCK_VECTOR, 1 );
 
  /* enable 1mS interrupts */
  *PITR = (unsigned short int)( SAM(0x09,0,PITM) );/* load counter */
  *PICR = (unsigned short int)                     /* enable interrupt */
    ( SAM(ISRL_PIT,8,PIRQL) | SAM(CLOCK_VECTOR,0,PIV) );
 
  atexit( Clock_exit );
}
 
void Clock_exit( void )
{
  /* shutdown the periodic interrupt */
  *PICR = (unsigned short int)
    ( SAM(0,8,PIRQL) | SAM(CLOCK_VECTOR,0,PIV) );
  /*     ^^ zero disables interrupt */
 
  /* do not restore old vector */
}
 
rtems_device_driver Clock_initialize(
  rtems_device_major_number major,
  rtems_device_minor_number minor,
  void *pargp
)
{
  Install_clock( Clock_isr );
 
  /*
   * make major/minor avail to others such as shared memory driver
   */
 
  rtems_clock_major = major;
  rtems_clock_minor = minor;
 
  return RTEMS_SUCCESSFUL;
}
 
rtems_device_driver Clock_control(
  rtems_device_major_number major,
  rtems_device_minor_number minor,
  void *pargp
)
{
    rtems_unsigned32 isrlevel;
    rtems_libio_ioctl_args_t *args = pargp;
 
    if (args == 0)
        goto done;
 
    /*
     * This is hokey, but until we get a defined interface
     * to do this, it will just be this simple...
     */
 
    if (args->command == rtems_build_name('I', 'S', 'R', ' '))
    {
        Clock_isr(CLOCK_VECTOR);
    }
    else if (args->command == rtems_build_name('N', 'E', 'W', ' '))
    {
      rtems_interrupt_disable( isrlevel );
       (void) set_vector( args->buffer, CLOCK_VECTOR, 1 );
      rtems_interrupt_enable( isrlevel );
    }
 
done:
    return RTEMS_SUCCESSFUL;
}
 

Line No.	Rev	Author	Line
1	30	unneback	`/* Clock_init()`
2			`*`
3			`* This routine initailizes the periodic interrupt timer on`
4			`* the Motorola 68332.`
5			`*`
6			`* Input parameters: NONE`
7			`*`
8			`* Output parameters: NONE`
9			`*`
10			`* COPYRIGHT (c) 1989-1999.`
11			`* On-Line Applications Research Corporation (OAR).`
12			`*`
13			`* The license and distribution terms for this file may be`
14			`* found in the file LICENSE in this distribution or at`
15			`* http://www.OARcorp.com/rtems/license.html.`
16			`*`
17			`* $Id: ckinit.c,v 1.2 2001-09-27 12:00:01 chris Exp $`
18			`*/`
19
20			`#include <stdlib.h>`
21			`#include <bsp.h>`
22			`#include <rtems/libio.h>`
23			`#include <efi332.h>`
24
25			`#define CLOCK_VECTOR EFI_PIV`
26
27			`rtems_unsigned32 Clock_isrs; /* ISRs until next tick */`
28			`volatile rtems_unsigned32 Clock_driver_ticks;`
29			`/* ticks since initialization */`
30			`rtems_isr_entry Old_ticker;`
31
32			`void Clock_exit( void );`
33
34			`/*`
35			`* These are set by clock driver during its init`
36			`*/`
37
38			`rtems_device_major_number rtems_clock_major = ~0;`
39			`rtems_device_minor_number rtems_clock_minor;`
40
41			`rtems_isr Clock_isr(rtems_vector_number vector)`
42			`{`
43			`Clock_driver_ticks += 1;`
44
45			`if ( Clock_isrs == 1 ) {`
46			`rtems_clock_tick();`
47			`Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;`
48			`}`
49			`else`
50			`Clock_isrs -= 1;`
51			`}`
52
53			`void Install_clock(`
54			`rtems_isr_entry clock_isr`
55			`)`
56			`{`
57			`Clock_driver_ticks = 0;`
58			`Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;`
59
60			`Old_ticker = (rtems_isr_entry) set_vector( clock_isr, CLOCK_VECTOR, 1 );`
61
62			`/* enable 1mS interrupts */`
63			`PITR = (unsigned short int)( SAM(0x09,0,PITM) );/ load counter */`
64			`PICR = (unsigned short int) / enable interrupt */`
65			`( SAM(ISRL_PIT,8,PIRQL) \| SAM(CLOCK_VECTOR,0,PIV) );`
66
67			`atexit( Clock_exit );`
68			`}`
69
70			`void Clock_exit( void )`
71			`{`
72			`/* shutdown the periodic interrupt */`
73			`*PICR = (unsigned short int)`
74			`( SAM(0,8,PIRQL) \| SAM(CLOCK_VECTOR,0,PIV) );`
75			`/* ^^ zero disables interrupt */`
76
77			`/* do not restore old vector */`
78			`}`
79
80			`rtems_device_driver Clock_initialize(`
81			`rtems_device_major_number major,`
82			`rtems_device_minor_number minor,`
83			`void *pargp`
84			`)`
85			`{`
86			`Install_clock( Clock_isr );`
87
88			`/*`
89			`* make major/minor avail to others such as shared memory driver`
90			`*/`
91
92			`rtems_clock_major = major;`
93			`rtems_clock_minor = minor;`
94
95			`return RTEMS_SUCCESSFUL;`
96			`}`
97
98			`rtems_device_driver Clock_control(`
99			`rtems_device_major_number major,`
100			`rtems_device_minor_number minor,`
101			`void *pargp`
102			`)`
103			`{`
104			`rtems_unsigned32 isrlevel;`
105			`rtems_libio_ioctl_args_t *args = pargp;`
106
107			`if (args == 0)`
108			`goto done;`
109
110			`/*`
111			`* This is hokey, but until we get a defined interface`
112			`* to do this, it will just be this simple...`
113			`*/`
114
115			`if (args->command == rtems_build_name('I', 'S', 'R', ' '))`
116			`{`
117			`Clock_isr(CLOCK_VECTOR);`
118			`}`
119			`else if (args->command == rtems_build_name('N', 'E', 'W', ' '))`
120			`{`
121			`rtems_interrupt_disable( isrlevel );`
122			`(void) set_vector( args->buffer, CLOCK_VECTOR, 1 );`
123			`rtems_interrupt_enable( isrlevel );`
124			`}`
125
126			`done:`
127			`return RTEMS_SUCCESSFUL;`
128			`}`
129

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [efi332/] [clock/] [ckinit.c] - Blame information for rev 173