source: rtems/c/src/exec/score/cpu/c4x/c4xio.h @ 61ba9763

4.104.114.84.95
Last change on this file since 61ba9763 was 61ba9763, checked in by Joel Sherrill <joel.sherrill@…>, on Feb 22, 2000 at 6:39:52 PM

New port of RTEMS to TI C3x and C4x.

  • Property mode set to 100644
File size: 1.2 KB
Line 
1/*
2 *  C4X IO Information
3 *
4 *  $Id$
5 */
6
7#ifndef __C4XIO_h
8#define __C4XIO_h
9
10/*
11 *  The following section of C4x timer code is based on C40 specific
12 *  timer code from Ran Cabell <rcabell@norfolk.infi.net>.  The
13 *  only C3x/C4x difference spotted was the address of the timer.
14 *  The names have been changed to be more RTEMS like.
15 */
16
17struct c4x_timer {
18    volatile int tcontrol;
19    volatile int r1[3];
20    volatile int tcounter;
21    volatile int r2[3];
22    volatile int tperiod;
23};
24
25#ifdef _TMS320C40
26#define C4X_TIMER_0 ((struct c4x_timer*)0x100020)
27#else
28#define C4X_TIMER_0 ((struct c4x_timer*)0x808020)
29#define C4X_TIMER_1 ((struct c4x_timer*)0x808030)
30#endif
31
32#define c4x_timer_start( _timer ) \
33    _timer->tcontrol=0x02c1
34
35#define c4x_timer_stop( _timer ) _timer->tcontrol = 0
36
37#define c4x_timer_get_counter( _timer ) (volatile int)(_timer->tcounter)
38
39#define c4x_timer_set_counter( _timer, _value ) \
40  do { \
41     (volatile int)(_timer->tcounter) = _value; \
42  } while (0);
43
44#define c4x_timer_get_period( _timer ) (volatile int)(_timer->tperiod)
45
46#define c4x_timer_set_period( _timer, _value ) \
47  do { \
48     (volatile int)(_timer->tperiod) = _value; \
49  } while (0);
50
51#endif
52/* end if include file */
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