mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 09:02:00 +00:00
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
|
/*
|
||
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
||
|
|
* License. See the file "COPYING" in the main directory of this archive
|
||
|
|
* for more details.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2008 Kevin D. Kissell
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Definitions used for common event timer implementation
|
||
|
|
* for MIPS 4K-type processors and their MIPS MT variants.
|
||
|
|
* Avoids unsightly extern declarations in C files.
|
||
|
|
*/
|
||
|
|
#ifndef __ASM_CEVT_R4K_H
|
||
|
|
#define __ASM_CEVT_R4K_H
|
||
|
|
|
||
|
|
DECLARE_PER_CPU(struct clock_event_device, mips_clockevent_device);
|
||
|
|
|
||
|
|
void mips_event_handler(struct clock_event_device *dev);
|
||
|
|
int c0_compare_int_usable(void);
|
||
|
|
void mips_set_clock_mode(enum clock_event_mode, struct clock_event_device *);
|
||
|
|
irqreturn_t c0_compare_interrupt(int, void *);
|
||
|
|
|
||
|
|
extern struct irqaction c0_compare_irqaction;
|
||
|
|
extern int cp0_timer_irq_installed;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Possibly handle a performance counter interrupt.
|
||
|
|
* Return true if the timer interrupt should not be checked
|
||
|
|
*/
|
||
|
|
|
||
|
|
static inline int handle_perf_irq(int r2)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* The performance counter overflow interrupt may be shared with the
|
||
|
|
* timer interrupt (cp0_perfcount_irq < 0). If it is and a
|
||
|
|
* performance counter has overflowed (perf_irq() == IRQ_HANDLED)
|
||
|
|
* and we can't reliably determine if a counter interrupt has also
|
||
|
|
* happened (!r2) then don't check for a timer interrupt.
|
||
|
|
*/
|
||
|
|
return (cp0_perfcount_irq < 0) &&
|
||
|
|
perf_irq() == IRQ_HANDLED &&
|
||
|
|
!r2;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* __ASM_CEVT_R4K_H */
|