xref: /linux/arch/m68k/include/asm/timex.h (revision ca55b2fef3a9373fcfc30f82fd26bc7fccbda732)
1 /*
2  * linux/include/asm-m68k/timex.h
3  *
4  * m68k architecture timex specifications
5  */
6 #ifndef _ASMm68K_TIMEX_H
7 #define _ASMm68K_TIMEX_H
8 
9 #ifdef CONFIG_COLDFIRE
10 /*
11  * CLOCK_TICK_RATE should give the underlying frequency of the tick timer
12  * to make ntp work best.  For Coldfires, that's the main clock.
13  */
14 #include <asm/coldfire.h>
15 #define CLOCK_TICK_RATE	MCF_CLK
16 #else
17 /*
18  * This default CLOCK_TICK_RATE is probably wrong for many 68k boards
19  * Users of those boards will need to check and modify accordingly
20  */
21 #define CLOCK_TICK_RATE	1193180 /* Underlying HZ */
22 #endif
23 
24 typedef unsigned long cycles_t;
25 
26 static inline cycles_t get_cycles(void)
27 {
28 	return 0;
29 }
30 
31 extern unsigned long (*mach_random_get_entropy)(void);
32 
33 static inline unsigned long random_get_entropy(void)
34 {
35 	if (mach_random_get_entropy)
36 		return mach_random_get_entropy();
37 	return 0;
38 }
39 #define random_get_entropy	random_get_entropy
40 
41 #endif
42