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/arch/xtensa/include/asm/timex.h

http://github.com/mirrors/linux
C Header | 62 lines | 39 code | 13 blank | 10 comment | 3 complexity | be46d8967f011c1b0051531389f3f337 MD5 | raw file
 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) 2001 - 2013 Tensilica Inc.
 7 */
 8
 9#ifndef _XTENSA_TIMEX_H
10#define _XTENSA_TIMEX_H
11
12#include <asm/processor.h>
13
14#if XCHAL_NUM_TIMERS > 0 && \
15	XTENSA_INT_LEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL
16# define LINUX_TIMER     0
17# define LINUX_TIMER_INT XCHAL_TIMER0_INTERRUPT
18#elif XCHAL_NUM_TIMERS > 1 && \
19	XTENSA_INT_LEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL
20# define LINUX_TIMER     1
21# define LINUX_TIMER_INT XCHAL_TIMER1_INTERRUPT
22#elif XCHAL_NUM_TIMERS > 2 && \
23	XTENSA_INT_LEVEL(XCHAL_TIMER2_INTERRUPT) <= XCHAL_EXCM_LEVEL
24# define LINUX_TIMER     2
25# define LINUX_TIMER_INT XCHAL_TIMER2_INTERRUPT
26#else
27# error "Bad timer number for Linux configurations!"
28#endif
29
30extern unsigned long ccount_freq;
31
32typedef unsigned long long cycles_t;
33
34#define get_cycles()	(0)
35
36void local_timer_setup(unsigned cpu);
37
38/*
39 * Register access.
40 */
41
42static inline unsigned long get_ccount (void)
43{
44	return xtensa_get_sr(ccount);
45}
46
47static inline void set_ccount (unsigned long ccount)
48{
49	xtensa_set_sr(ccount, ccount);
50}
51
52static inline unsigned long get_linux_timer (void)
53{
54	return xtensa_get_sr(SREG_CCOMPARE + LINUX_TIMER);
55}
56
57static inline void set_linux_timer (unsigned long ccompare)
58{
59	xtensa_set_sr(ccompare, SREG_CCOMPARE + LINUX_TIMER);
60}
61
62#endif	/* _XTENSA_TIMEX_H */