bd156147eb
This adds basic NO_IDLE_HZ support to the SH timer API so timers are able to wire it up. Taken from the ARM version, as it fit in to our API with very few changes needed. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
#ifndef __ASM_SH_TIMER_H
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#define __ASM_SH_TIMER_H
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#include <linux/sysdev.h>
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#include <asm/cpu/timer.h>
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struct sys_timer_ops {
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int (*init)(void);
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int (*start)(void);
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int (*stop)(void);
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#ifndef CONFIG_GENERIC_TIME
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unsigned long (*get_offset)(void);
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#endif
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};
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struct sys_timer {
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const char *name;
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struct sys_device dev;
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struct sys_timer_ops *ops;
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#ifdef CONFIG_NO_IDLE_HZ
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struct dyn_tick_timer *dyn_tick;
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#endif
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};
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#ifdef CONFIG_NO_IDLE_HZ
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#define DYN_TICK_ENABLED (1 << 1)
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struct dyn_tick_timer {
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spinlock_t lock;
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unsigned int state; /* Current state */
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int (*enable)(void); /* Enables dynamic tick */
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int (*disable)(void); /* Disables dynamic tick */
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void (*reprogram)(unsigned long); /* Reprograms the timer */
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int (*handler)(int, void *);
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};
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void timer_dyn_reprogram(void);
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#else
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#define timer_dyn_reprogram() do { } while (0)
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#endif
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#define TICK_SIZE (tick_nsec / 1000)
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extern struct sys_timer tmu_timer, cmt_timer, mtu2_timer;
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extern struct sys_timer *sys_timer;
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#ifndef CONFIG_GENERIC_TIME
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static inline unsigned long get_timer_offset(void)
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{
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return sys_timer->ops->get_offset();
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}
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#endif
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/* arch/sh/kernel/timers/timer.c */
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struct sys_timer *get_sys_timer(void);
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/* arch/sh/kernel/time.c */
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void handle_timer_tick(void);
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#endif /* __ASM_SH_TIMER_H */
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