include/asm-ppc/hw_irq.h

   1 /*
   2  * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
   3  */
   4 #ifdef __KERNEL__
   5 #ifndef _PPC_HW_IRQ_H
   6 #define _PPC_HW_IRQ_H
   7
   8 #include <asm/ptrace.h>
   9 #include <asm/reg.h>
  10
  11 extern void timer_interrupt(struct pt_regs *);
  12 extern void ppc_irq_dispatch_handler(struct pt_regs *regs, int irq);
  13
  14 #define INLINE_IRQS
  15
  16 #define irqs_disabled() ((mfmsr() & MSR_EE) == 0)
  17
  18 #ifdef INLINE_IRQS
  19
  20 static inline void local_irq_disable(void)
  21 {
  22         unsigned long msr;
  23         msr = mfmsr();
  24         mtmsr(msr & ~MSR_EE);
  25         __asm__ __volatile__("": : :"memory");
  26 }
  27
  28 static inline void local_irq_enable(void)
  29 {
  30         unsigned long msr;
  31         __asm__ __volatile__("": : :"memory");
  32         msr = mfmsr();
  33         mtmsr(msr | MSR_EE);
  34 }
  35
  36 static inline void local_irq_save_ptr(unsigned long *flags)
  37 {
  38         unsigned long msr;
  39         msr = mfmsr();
  40         *flags = msr;
  41         mtmsr(msr & ~MSR_EE);
  42         __asm__ __volatile__("": : :"memory");
  43 }
  44
  45 #define local_save_flags(flags)         ((flags) = mfmsr())
  46 #define local_irq_save(flags)           local_irq_save_ptr(&flags)
  47 #define local_irq_restore(flags)        mtmsr(flags)
  48
  49 #else
  50
  51 extern void local_irq_enable(void);
  52 extern void local_irq_disable(void);
  53 extern void local_irq_restore(unsigned long);
  54 extern void local_save_flags_ptr(unsigned long *);
  55
  56 #define local_save_flags(flags) local_save_flags_ptr(&flags)
  57 #define local_irq_save(flags) ({local_save_flags(flags);local_irq_disable();})
  58
  59 #endif
  60
  61 extern void do_lost_interrupts(unsigned long);
  62
  63 #define mask_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->disable) irq_desc[irq].handler->disable(irq);})
  64 #define unmask_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->enable) irq_desc[irq].handler->enable(irq);})
  65 #define ack_irq(irq) ({if (irq_desc[irq].handler && irq_desc[irq].handler->ack) irq_desc[irq].handler->ack(irq);})
  66
  67 /* Should we handle this via lost interrupts and IPIs or should we don't care like
  68  * we do now ? --BenH.
  69  */
  70 struct hw_interrupt_type;
  71 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
  72
  73
  74 #endif /* _PPC_HW_IRQ_H */
  75 #endif /* __KERNEL__ */