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authorDavid S. Miller <davem@sunset.davemloft.net>2007-03-05 18:28:37 -0500
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-26 04:54:15 -0400
commit112f48716d9f292c92a033cff9e3ce7405ed4280 (patch)
tree5be2952ca83adb519df5995c10e0686447fea88f /include/asm-sparc64/timer.h
parent038cb01ea69cb24ecf30e3ec882e429c84badbeb (diff)
[SPARC64]: Add clocksource/clockevents support.
I'd like to thank John Stul and others for helping me along the way. A lot of cleanups fell out of this. For example, the get_compare() tick_op was totally unused, so was deleted. And the most often used tick_op members were grouped together for cache-friendlyness. The sparc64 TSC is given to the kernel as a one-shot timer. tick_ops->init_timer() simply turns off the privileged bit in the tick register (when possible), and disables the interrupt by setting bit 63 in the compare register. The ->disable_irq() op also sets this bit. tick_ops->add_compare() is changed to: 1) Add the given delta to "tick" not to "compare" 2) Return a boolean which, if true, means that the tick value read after writing the compare value was found to have incremented past the initial tick value. This mirrors logic used in the HPET driver's ->next_event() method. Each tick_ops implementation also now provides a name string. And we feed this into the clocksource and clockevents layers. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/asm-sparc64/timer.h')
-rw-r--r--include/asm-sparc64/timer.h17
1 files changed, 7 insertions, 10 deletions
diff --git a/include/asm-sparc64/timer.h b/include/asm-sparc64/timer.h
index d435594df786..ccbd69448866 100644
--- a/include/asm-sparc64/timer.h
+++ b/include/asm-sparc64/timer.h
@@ -11,22 +11,19 @@
11 11
12 12
13struct sparc64_tick_ops { 13struct sparc64_tick_ops {
14 void (*init_tick)(unsigned long);
15 unsigned long (*get_tick)(void); 14 unsigned long (*get_tick)(void);
16 unsigned long (*get_compare)(void); 15 int (*add_compare)(unsigned long);
17 unsigned long (*add_tick)(unsigned long, unsigned long);
18 unsigned long (*add_compare)(unsigned long);
19 unsigned long softint_mask; 16 unsigned long softint_mask;
17 void (*disable_irq)(void);
18
19 void (*init_tick)(void);
20 unsigned long (*add_tick)(unsigned long);
21
22 char *name;
20}; 23};
21 24
22extern struct sparc64_tick_ops *tick_ops; 25extern struct sparc64_tick_ops *tick_ops;
23 26
24#ifdef CONFIG_SMP
25extern unsigned long timer_tick_offset;
26struct pt_regs;
27extern void timer_tick_interrupt(struct pt_regs *);
28#endif
29
30extern unsigned long sparc64_get_clock_tick(unsigned int cpu); 27extern unsigned long sparc64_get_clock_tick(unsigned int cpu);
31 28
32#endif /* _SPARC64_TIMER_H */ 29#endif /* _SPARC64_TIMER_H */