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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [mvme162/] [clock/] [ckinit.c] - Blame information for rev 173

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/*  Clock_init()
 *
 *  This routine initializes the Tick Timer 2 on the MVME162 board.
 *  The tick frequency is 1 millisecond.
 *
 *  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.
 *
 *  Modifications of respective RTEMS file: COPYRIGHT (c) 1994.
 *  EISCAT Scientific Association. M.Savitski
 *
 *  This material is a part of the MVME162 Board Support Package
 *  for the RTEMS executive. Its licensing policies are those of the
 *  RTEMS above.
 *
 *  $Id: ckinit.c,v 1.2 2001-09-27 12:00:18 chris Exp $
 */
 
#include <stdlib.h>
 
#include <bsp.h>
#include <rtems/libio.h>
 
#define MS_COUNT          1000            /* T2's countdown constant (1 ms) */
#define CLOCK_INT_LEVEL   6               /* T2's interrupt level */
 
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 );
 
#define CLOCK_VECTOR (VBR0 * 0x10 + 0x9)
/*
 * These are set by clock driver during its init
 */
 
rtems_device_major_number rtems_clock_major = ~0;
rtems_device_minor_number rtems_clock_minor;
 
 
/*
 *  ISR Handler
 */
 
rtems_isr Clock_isr(rtems_vector_number vector)
{
  Clock_driver_ticks += 1;
  lcsr->timer_cnt_2 = 0;            /* clear counter */
  lcsr->intr_clear |= 0x02000000;
 
  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 );
  lcsr->vector_base |= MASK_INT;   /* unmask VMEchip2 interrupts */
  lcsr->to_ctl = 0xE7;             /* prescaler to 1 MHz (see Appendix A1) */
  lcsr->timer_cmp_2 = MS_COUNT;
  lcsr->timer_cnt_2 = 0;           /* clear counter */
  lcsr->board_ctl |= 0x700;        /* increment, reset-on-compare, and */
                                   /*   clear-overflow-cnt */
 
  lcsr->intr_level[0] |= CLOCK_INT_LEVEL * 0x10;      /* set int level */
  lcsr->intr_ena |= 0x02000000;       /* enable tick timer 2 interrupt */
 
  atexit( Clock_exit );
}
 
void Clock_exit( void )
{
/* Dummy for now. See other m68k BSP's for code examples */
}
 
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 initializes the Tick Timer 2 on the MVME162 board.`
4			`* The tick frequency is 1 millisecond.`
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			`* Modifications of respective RTEMS file: COPYRIGHT (c) 1994.`
18			`* EISCAT Scientific Association. M.Savitski`
19			`*`
20			`* This material is a part of the MVME162 Board Support Package`
21			`* for the RTEMS executive. Its licensing policies are those of the`
22			`* RTEMS above.`
23			`*`
24			`* $Id: ckinit.c,v 1.2 2001-09-27 12:00:18 chris Exp $`
25			`*/`
26
27			`#include <stdlib.h>`
28
29			`#include <bsp.h>`
30			`#include <rtems/libio.h>`
31
32			`#define MS_COUNT 1000 /* T2's countdown constant (1 ms) */`
33			`#define CLOCK_INT_LEVEL 6 /* T2's interrupt level */`
34
35			`rtems_unsigned32 Clock_isrs; /* ISRs until next tick */`
36			`volatile rtems_unsigned32 Clock_driver_ticks; /* ticks since initialization */`
37			`rtems_isr_entry Old_ticker;`
38
39			`void Clock_exit( void );`
40
41			`#define CLOCK_VECTOR (VBR0 * 0x10 + 0x9)`
42			`/*`
43			`* These are set by clock driver during its init`
44			`*/`
45
46			`rtems_device_major_number rtems_clock_major = ~0;`
47			`rtems_device_minor_number rtems_clock_minor;`
48
49
50			`/*`
51			`* ISR Handler`
52			`*/`
53
54			`rtems_isr Clock_isr(rtems_vector_number vector)`
55			`{`
56			`Clock_driver_ticks += 1;`
57			`lcsr->timer_cnt_2 = 0; /* clear counter */`
58			`lcsr->intr_clear \|= 0x02000000;`
59
60			`if ( Clock_isrs == 1 ) {`
61			`rtems_clock_tick();`
62			`Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;`
63			`}`
64			`else`
65			`Clock_isrs -= 1;`
66			`}`
67
68			`void Install_clock(rtems_isr_entry clock_isr )`
69			`{`
70
71			`Clock_driver_ticks = 0;`
72			`Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;`
73
74			`Old_ticker = (rtems_isr_entry) set_vector( clock_isr, CLOCK_VECTOR, 1 );`
75			`lcsr->vector_base \|= MASK_INT; /* unmask VMEchip2 interrupts */`
76			`lcsr->to_ctl = 0xE7; /* prescaler to 1 MHz (see Appendix A1) */`
77			`lcsr->timer_cmp_2 = MS_COUNT;`
78			`lcsr->timer_cnt_2 = 0; /* clear counter */`
79			`lcsr->board_ctl \|= 0x700; /* increment, reset-on-compare, and */`
80			`/* clear-overflow-cnt */`
81
82			`lcsr->intr_level[0] \|= CLOCK_INT_LEVEL * 0x10; /* set int level */`
83			`lcsr->intr_ena \|= 0x02000000; /* enable tick timer 2 interrupt */`
84
85			`atexit( Clock_exit );`
86			`}`
87
88			`void Clock_exit( void )`
89			`{`
90			`/* Dummy for now. See other m68k BSP's for code examples */`
91			`}`
92
93			`rtems_device_driver Clock_initialize(`
94			`rtems_device_major_number major,`
95			`rtems_device_minor_number minor,`
96			`void *pargp`
97			`)`
98			`{`
99			`Install_clock( Clock_isr );`
100
101			`/*`
102			`* make major/minor avail to others such as shared memory driver`
103			`*/`
104
105			`rtems_clock_major = major;`
106			`rtems_clock_minor = minor;`
107
108			`return RTEMS_SUCCESSFUL;`
109			`}`
110
111			`rtems_device_driver Clock_control(`
112			`rtems_device_major_number major,`
113			`rtems_device_minor_number minor,`
114			`void *pargp`
115			`)`
116			`{`
117			`rtems_unsigned32 isrlevel;`
118			`rtems_libio_ioctl_args_t *args = pargp;`
119
120			`if (args == 0)`
121			`goto done;`
122
123			`/*`
124			`* This is hokey, but until we get a defined interface`
125			`* to do this, it will just be this simple...`
126			`*/`
127
128			`if (args->command == rtems_build_name('I', 'S', 'R', ' '))`
129			`{`
130			`Clock_isr(CLOCK_VECTOR);`
131			`}`
132			`else if (args->command == rtems_build_name('N', 'E', 'W', ' '))`
133			`{`
134			`rtems_interrupt_disable( isrlevel );`
135			`(void) set_vector( args->buffer, CLOCK_VECTOR, 1 );`
136			`rtems_interrupt_enable( isrlevel );`
137			`}`
138
139			`done:`
140			`return RTEMS_SUCCESSFUL;`
141			`}`
142

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [mvme162/] [clock/] [ckinit.c] - Blame information for rev 173