Linux Kernel  3.7.1
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timex.h
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1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License. See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 1998, 1999, 2003 by Ralf Baechle
7  */
8 #ifndef _ASM_TIMEX_H
9 #define _ASM_TIMEX_H
10 
11 #ifdef __KERNEL__
12 
13 #include <asm/mipsregs.h>
14 
15 /*
16  * This is the clock rate of the i8253 PIT. A MIPS system may not have
17  * a PIT by the symbol is used all over the kernel including some APIs.
18  * So keeping it defined to the number for the PIT is the only sane thing
19  * for now.
20  */
21 #define CLOCK_TICK_RATE 1193182
22 
23 /*
24  * Standard way to access the cycle counter.
25  * Currently only used on SMP for scheduling.
26  *
27  * Only the low 32 bits are available as a continuously counting entity.
28  * But this only means we'll force a reschedule every 8 seconds or so,
29  * which isn't an evil thing.
30  *
31  * We know that all SMP capable CPUs have cycle counters.
32  */
33 
34 typedef unsigned int cycles_t;
35 
36 static inline cycles_t get_cycles(void)
37 {
38  return 0;
39 }
40 
41 #endif /* __KERNEL__ */
42 
43 #endif /* _ASM_TIMEX_H */