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
get_cycles(void)36 static inline cycles_t get_cycles(void)
37 {
38 return 0;
39 }
40
41 #endif /* __KERNEL__ */
42
43 #endif /* _ASM_TIMEX_H */
44