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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [dmv152/] [clock/] [ckinit.c] - Blame information for rev 814

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/*  Clock_init()
 *
 *  This routine initializes the Z80386 1 on the MVME136 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.
 *
 *  $Id: ckinit.c,v 1.2 2001-09-27 12:00:00 chris Exp $
 */
 
#include <stdlib.h>
 
#include <bsp.h>
#include <rtems/libio.h>
 
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  TIMER_VECTOR
 
/*
 * 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;
 
  Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xE2 );
  Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0x22 );
  Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xC6 );
 
  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
)
{
  rtems_unsigned8 data;
 
  Clock_driver_ticks = 0;
  Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;
 
  Old_ticker = (rtems_isr_entry) set_vector( clock_isr, CLOCK_VECTOR, 1 );
 
  Z8x36_WRITE( TIMER, MASTER_CFG, 0xd4 );
  Z8x36_READ ( TIMER, MASTER_INTR, data );
  Z8x36_WRITE( TIMER, MASTER_INTR, (data & 0x7E) );
  Z8x36_WRITE( TIMER, CT1_TIME_CONST_MSB, 0x04 );
  Z8x36_WRITE( TIMER, CT1_TIME_CONST_LSB, 0xCE );
  Z8x36_WRITE( TIMER, CT1_MODE_SPEC, 0x83 );
  Z8x36_WRITE( TIMER, CNT_TMR_VECTOR, CLOCK_VECTOR );
  Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0x20 );
  Z8x36_READ ( TIMER, MASTER_INTR, data );
  Z8x36_WRITE( TIMER, MASTER_INTR, (data & 0xDA) | 0x80 );
 
  /*
   * ACC_IC54 - interrupt 5 will be vectored and mapped to level 6
   */
 
  data = (*(rtems_unsigned8 *)0x0D00000B);
  (*(rtems_unsigned8 *)0x0D00000B) = (data & 0x7F) | 0x60;
 
  Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xC6 );
 
  atexit( Clock_exit );
}
 
void Clock_exit( void )
{
  rtems_unsigned8 data;
 
  Z8x36_READ ( TIMER, MASTER_INTR, data );
  Z8x36_WRITE( TIMER, MASTER_INTR, (data & 0x01) );
  /* 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 initializes the Z80386 1 on the MVME136 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			`* $Id: ckinit.c,v 1.2 2001-09-27 12:00:00 chris Exp $`
18			`*/`
19
20			`#include <stdlib.h>`
21
22			`#include <bsp.h>`
23			`#include <rtems/libio.h>`
24
25			`rtems_unsigned32 Clock_isrs; /* ISRs until next tick */`
26			`volatile rtems_unsigned32 Clock_driver_ticks;`
27			`/* ticks since initialization */`
28			`rtems_isr_entry Old_ticker;`
29
30			`void Clock_exit( void );`
31
32			`#define CLOCK_VECTOR TIMER_VECTOR`
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			`/*`
42			`* ISR Handler`
43			`*/`
44
45			`rtems_isr Clock_isr(`
46			`rtems_vector_number vector`
47			`)`
48			`{`
49			`Clock_driver_ticks += 1;`
50
51			`Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xE2 );`
52			`Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0x22 );`
53			`Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xC6 );`
54
55			`if ( Clock_isrs == 1 ) {`
56			`rtems_clock_tick();`
57			`Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;`
58			`}`
59			`else`
60			`Clock_isrs -= 1;`
61			`}`
62
63			`void Install_clock(`
64			`rtems_isr_entry clock_isr`
65			`)`
66			`{`
67			`rtems_unsigned8 data;`
68
69			`Clock_driver_ticks = 0;`
70			`Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000;`
71
72			`Old_ticker = (rtems_isr_entry) set_vector( clock_isr, CLOCK_VECTOR, 1 );`
73
74			`Z8x36_WRITE( TIMER, MASTER_CFG, 0xd4 );`
75			`Z8x36_READ ( TIMER, MASTER_INTR, data );`
76			`Z8x36_WRITE( TIMER, MASTER_INTR, (data & 0x7E) );`
77			`Z8x36_WRITE( TIMER, CT1_TIME_CONST_MSB, 0x04 );`
78			`Z8x36_WRITE( TIMER, CT1_TIME_CONST_LSB, 0xCE );`
79			`Z8x36_WRITE( TIMER, CT1_MODE_SPEC, 0x83 );`
80			`Z8x36_WRITE( TIMER, CNT_TMR_VECTOR, CLOCK_VECTOR );`
81			`Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0x20 );`
82			`Z8x36_READ ( TIMER, MASTER_INTR, data );`
83			`Z8x36_WRITE( TIMER, MASTER_INTR, (data & 0xDA) \| 0x80 );`
84
85			`/*`
86			`* ACC_IC54 - interrupt 5 will be vectored and mapped to level 6`
87			`*/`
88
89			`data = ((rtems_unsigned8 )0x0D00000B);`
90			`((rtems_unsigned8 )0x0D00000B) = (data & 0x7F) \| 0x60;`
91
92			`Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xC6 );`
93
94			`atexit( Clock_exit );`
95			`}`
96
97			`void Clock_exit( void )`
98			`{`
99			`rtems_unsigned8 data;`
100
101			`Z8x36_READ ( TIMER, MASTER_INTR, data );`
102			`Z8x36_WRITE( TIMER, MASTER_INTR, (data & 0x01) );`
103			`/* do not restore old vector */`
104			`}`
105
106			`rtems_device_driver Clock_initialize(`
107			`rtems_device_major_number major,`
108			`rtems_device_minor_number minor,`
109			`void *pargp`
110			`)`
111			`{`
112			`Install_clock( Clock_isr );`
113
114			`/*`
115			`* make major/minor avail to others such as shared memory driver`
116			`*/`
117
118			`rtems_clock_major = major;`
119			`rtems_clock_minor = minor;`
120
121			`return RTEMS_SUCCESSFUL;`
122			`}`
123
124			`rtems_device_driver Clock_control(`
125			`rtems_device_major_number major,`
126			`rtems_device_minor_number minor,`
127			`void *pargp`
128			`)`
129			`{`
130			`rtems_unsigned32 isrlevel;`
131			`rtems_libio_ioctl_args_t *args = pargp;`
132
133			`if (args == 0)`
134			`goto done;`
135
136			`/*`
137			`* This is hokey, but until we get a defined interface`
138			`* to do this, it will just be this simple...`
139			`*/`
140
141			`if (args->command == rtems_build_name('I', 'S', 'R', ' '))`
142			`{`
143			`Clock_isr(CLOCK_VECTOR);`
144			`}`
145			`else if (args->command == rtems_build_name('N', 'E', 'W', ' '))`
146			`{`
147			`rtems_interrupt_disable( isrlevel );`
148			`(void) set_vector( args->buffer, CLOCK_VECTOR, 1 );`
149			`rtems_interrupt_enable( isrlevel );`
150			`}`
151
152			`done:`
153			`return RTEMS_SUCCESSFUL;`
154			`}`
155

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [dmv152/] [clock/] [ckinit.c] - Blame information for rev 814