kernel-ark/arch/sparc/include/asm/irqflags_64.h
David S. Miller b4f4372f96 sparc64: Make %pil level 15 a pseudo-NMI.
So that we can profile code even in a local_irq_disable() section,
only write 14 (instead of 15) into the %pil register to disable IRQs.

This allows PIL level 15 to serve as a pseudo NMI.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-12-04 09:17:02 -08:00

92 lines
1.6 KiB
C

/*
* include/asm/irqflags.h
*
* IRQ flags handling
*
* This file gets included from lowlevel asm headers too, to provide
* wrapped versions of the local_irq_*() APIs, based on the
* raw_local_irq_*() functions from the lowlevel headers.
*/
#ifndef _ASM_IRQFLAGS_H
#define _ASM_IRQFLAGS_H
#include <asm/pil.h>
#ifndef __ASSEMBLY__
static inline unsigned long __raw_local_save_flags(void)
{
unsigned long flags;
__asm__ __volatile__(
"rdpr %%pil, %0"
: "=r" (flags)
);
return flags;
}
#define raw_local_save_flags(flags) \
do { (flags) = __raw_local_save_flags(); } while (0)
static inline void raw_local_irq_restore(unsigned long flags)
{
__asm__ __volatile__(
"wrpr %0, %%pil"
: /* no output */
: "r" (flags)
: "memory"
);
}
static inline void raw_local_irq_disable(void)
{
__asm__ __volatile__(
"wrpr %0, %%pil"
: /* no outputs */
: "i" (PIL_NORMAL_MAX)
: "memory"
);
}
static inline void raw_local_irq_enable(void)
{
__asm__ __volatile__(
"wrpr 0, %%pil"
: /* no outputs */
: /* no inputs */
: "memory"
);
}
static inline int raw_irqs_disabled_flags(unsigned long flags)
{
return (flags > 0);
}
static inline int raw_irqs_disabled(void)
{
unsigned long flags = __raw_local_save_flags();
return raw_irqs_disabled_flags(flags);
}
/*
* For spinlocks, etc:
*/
static inline unsigned long __raw_local_irq_save(void)
{
unsigned long flags = __raw_local_save_flags();
raw_local_irq_disable();
return flags;
}
#define raw_local_irq_save(flags) \
do { (flags) = __raw_local_irq_save(); } while (0)
#endif /* (__ASSEMBLY__) */
#endif /* !(_ASM_IRQFLAGS_H) */