tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 */