| /* |
| * timer.h: Definitions for the timer chips on the Sparc. |
| * |
| * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) |
| */ |
| |
| |
| #ifndef _SPARC_TIMER_H |
| #define _SPARC_TIMER_H |
| |
| #include <linux/clocksource.h> |
| #include <linux/irqreturn.h> |
| |
| #include <asm-generic/percpu.h> |
| |
| #include <asm/cpu_type.h> /* For SUN4M_NCPUS */ |
| |
| #define SBUS_CLOCK_RATE 2000000 /* 2MHz */ |
| #define TIMER_VALUE_SHIFT 9 |
| #define TIMER_VALUE_MASK 0x3fffff |
| #define TIMER_LIMIT_BIT (1 << 31) /* Bit 31 in Counter-Timer register */ |
| |
| /* The counter timer register has the value offset by 9 bits. |
| * From sun4m manual: |
| * When a counter reaches the value in the corresponding limit register, |
| * the Limit bit is set and the counter is set to 500 nS (i.e. 0x00000200). |
| * |
| * To compensate for this add one to the value. |
| */ |
| static inline unsigned int timer_value(unsigned int value) |
| { |
| return (value + 1) << TIMER_VALUE_SHIFT; |
| } |
| |
| extern __volatile__ unsigned int *master_l10_counter; |
| |
| extern irqreturn_t notrace timer_interrupt(int dummy, void *dev_id); |
| |
| #ifdef CONFIG_SMP |
| DECLARE_PER_CPU(struct clock_event_device, sparc32_clockevent); |
| extern void register_percpu_ce(int cpu); |
| #endif |
| |
| #endif /* !(_SPARC_TIMER_H) */ |
