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