hw_irq.h
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/*
* Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
*/
#ifdef __KERNEL__
#ifndef _PPC_HW_IRQ_H
#define _PPC_HW_IRQ_H
#include <asm/ptrace.h>
#include <asm/reg.h>
extern void timer_interrupt(struct pt_regs *);
#define INLINE_IRQS
#define irqs_disabled() ((mfmsr() & MSR_EE) == 0)
#ifdef INLINE_IRQS
static inline void local_irq_disable(void)
{
unsigned long msr;
msr = mfmsr();
mtmsr(msr & ~MSR_EE);
__asm__ __volatile__("": : :"memory");
}
static inline void local_irq_enable(void)
{
unsigned long msr;
__asm__ __volatile__("": : :"memory");
msr = mfmsr();
mtmsr(msr | MSR_EE);
}
static inline void local_irq_save_ptr(unsigned long *flags)
{
unsigned long msr;
msr = mfmsr();
*flags = msr;
mtmsr(msr & ~MSR_EE);
__asm__ __volatile__("": : :"memory");
}
#define local_save_flags(flags) ((flags) = mfmsr())
#define local_irq_save(flags) local_irq_save_ptr(&flags)
#define local_irq_restore(flags) mtmsr(flags)
#else
extern void local_irq_enable(void);
extern void local_irq_disable(void);
extern void local_irq_restore(unsigned long);
extern void local_save_flags_ptr(unsigned long *);
#define local_save_flags(flags) local_save_flags_ptr(&flags)
#define local_irq_save(flags) ({local_save_flags(flags);local_irq_disable();})
#endif
extern void do_lost_interrupts(unsigned long);
#define mask_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->disable) irq_desc[irq].handler->disable(irq);})
#define unmask_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->enable) irq_desc[irq].handler->enable(irq);})
#define ack_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->ack) irq_desc[irq].handler->ack(irq);})
/* Should we handle this via lost interrupts and IPIs or should we don't care like
* we do now ? --BenH.
*/
struct hw_interrupt_type;
static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
#endif /* _PPC_HW_IRQ_H */
#endif /* __KERNEL__ */