source: rtems/cpukit/score/cpu/c4x/c4xio.h @ b6f9b5f1

4.104.114.84.95
Last change on this file since b6f9b5f1 was b6f9b5f1, checked in by Joel Sherrill <joel.sherrill@…>, on Mar 1, 2000 at 6:08:53 PM

Added routines to get and set C3x IOF register. The code is conditionally
compiled and there is no comparable code for the C4x.

  • Property mode set to 100644
File size: 2.2 KB
Line 
1/*
2 *  C4X IO Information
3 *
4 *  $Id$
5 */
6
7#ifndef __C4XIO_h
8#define __C4XIO_h
9
10/*
11 *  Address defines
12 */
13
14#ifdef _TMS320C40
15#define C4X_TIMER_0 ((struct c4x_timer*)0x100020)
16#else
17#define C4X_TIMER_0 ((struct c4x_timer*)0x808020)
18#define C4X_TIMER_1 ((struct c4x_timer*)0x808030)
19#endif
20
21/* XXX how portable */
22
23/* C32 Internal Control Registers */
24#define C4X_STRB0_REG   0x808064
25#define C4X_STRB1_REG   0x808068
26#define C4X_IOSTRB_REG  0x808060
27
28/* C32 Internal RAM Locations */
29/* XXX how long */
30#define C4X_RAM_BLK_0   0x87fe00
31#define C4X_RAM_BLK_1   0x87ff00
32
33/*
34 *  Data Structures to Overlay the Peripherals on the CPU
35 */
36
37struct c4x_timer {
38  volatile int tcontrol;
39  volatile int r1[3];
40  volatile int tcounter;
41  volatile int r2[3];
42  volatile int tperiod;
43};
44
45
46
47
48/*
49 *  Timer Support Routines
50 *
51 *  The following section of C4x timer code is based on C40 specific
52 *  timer code from Ran Cabell <rcabell@norfolk.infi.net>.  The
53 *  only C3x/C4x difference spotted was the address of the timer.
54 *  The names have been changed to be more RTEMS like.
55 */
56
57#define c4x_timer_get_control( _timer ) (volatile int)(_timer->tcontrol)
58
59#define c4x_timer_set_control( _timer, _value ) \
60  do { \
61     (volatile int)(_timer->tcontrol) = _value; \
62  } while (0);
63
64#define c4x_timer_start( _timer ) \
65    c4x_timer_set_control(_timer, 0x02c1 )
66
67#define c4x_timer_stop( _timer ) _timer->tcontrol = 0
68
69#define c4x_timer_get_counter( _timer ) (volatile int)(_timer->tcounter)
70
71#define c4x_timer_set_counter( _timer, _value ) \
72  do { \
73     (volatile int)(_timer->tcounter) = _value; \
74  } while (0);
75
76#define c4x_timer_get_period( _timer ) (volatile int)(_timer->tperiod)
77
78#define c4x_timer_set_period( _timer, _value ) \
79  do { \
80     (volatile int)(_timer->tperiod) = _value; \
81  } while (0);
82
83/*
84 *  IO Flags
85 *
86 *  NOTE: iof on c3x, iiof on c4x
87 */
88
89#ifdef _TMS320C40
90
91#else
92
93static inline unsigned32 c3x_get_iof( void )
94{
95  register unsigned32 iof_value;
96
97  __asm__ volatile ("ldi iof, %0" : "=r" (iof_value));
98  return iof_value;
99}
100
101static inline void c3x_set_iof( unsigned32 value )
102{
103  __asm__ volatile ("ldi  %0,iof" : : "g" (value) : "iof", "cc");
104}
105
106#endif
107
108
109#endif
110/* end if include file */
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