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