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Diffstat (limited to 'include/asm-arm/mach/time.h')
-rw-r--r-- | include/asm-arm/mach/time.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/include/asm-arm/mach/time.h b/include/asm-arm/mach/time.h new file mode 100644 index 00000000000..5cf4fd659fd --- /dev/null +++ b/include/asm-arm/mach/time.h @@ -0,0 +1,54 @@ +/* + * linux/include/asm-arm/mach/time.h + * + * Copyright (C) 2004 MontaVista Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __ASM_ARM_MACH_TIME_H +#define __ASM_ARM_MACH_TIME_H + +#include <linux/sysdev.h> + +/* + * This is our kernel timer structure. + * + * - init + * Initialise the kernels jiffy timer source, claim interrupt + * using setup_irq. This is called early on during initialisation + * while interrupts are still disabled on the local CPU. + * - suspend + * Suspend the kernel jiffy timer source, if necessary. This + * is called with interrupts disabled, after all normal devices + * have been suspended. If no action is required, set this to + * NULL. + * - resume + * Resume the kernel jiffy timer source, if necessary. This + * is called with interrupts disabled before any normal devices + * are resumed. If no action is required, set this to NULL. + * - offset + * Return the timer offset in microseconds since the last timer + * interrupt. Note: this must take account of any unprocessed + * timer interrupt which may be pending. + */ +struct sys_timer { + struct sys_device dev; + void (*init)(void); + void (*suspend)(void); + void (*resume)(void); + unsigned long (*offset)(void); +}; + +extern struct sys_timer *system_timer; +extern void timer_tick(struct pt_regs *); + +/* + * Kernel time keeping support. + */ +extern int (*set_rtc)(void); +extern void save_time_delta(struct timespec *delta, struct timespec *rtc); +extern void restore_time_delta(struct timespec *delta, struct timespec *rtc); + +#endif |