Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / arch / mips / include / asm / cevt-r4k.h
blob65f9bdd02f1f787d35f03cc8a51f11c87704e1ee
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.
6 * Copyright (C) 2008 Kevin D. Kissell
7 */
9 /*
10 * Definitions used for common event timer implementation
11 * for MIPS 4K-type processors and their MIPS MT variants.
12 * Avoids unsightly extern declarations in C files.
14 #ifndef __ASM_CEVT_R4K_H
15 #define __ASM_CEVT_R4K_H
17 #include <linux/clockchips.h>
18 #include <asm/time.h>
20 DECLARE_PER_CPU(struct clock_event_device, mips_clockevent_device);
22 void mips_event_handler(struct clock_event_device *dev);
23 int c0_compare_int_usable(void);
24 void mips_set_clock_mode(enum clock_event_mode, struct clock_event_device *);
25 irqreturn_t c0_compare_interrupt(int, void *);
27 extern struct irqaction c0_compare_irqaction;
28 extern int cp0_timer_irq_installed;
31 * Possibly handle a performance counter interrupt.
32 * Return true if the timer interrupt should not be checked
35 static inline int handle_perf_irq(int r2)
38 * The performance counter overflow interrupt may be shared with the
39 * timer interrupt (cp0_perfcount_irq < 0). If it is and a
40 * performance counter has overflowed (perf_irq() == IRQ_HANDLED)
41 * and we can't reliably determine if a counter interrupt has also
42 * happened (!r2) then don't check for a timer interrupt.
44 return (cp0_perfcount_irq < 0) &&
45 perf_irq() == IRQ_HANDLED &&
46 !r2;
49 #endif /* __ASM_CEVT_R4K_H */