include/asm-powerpc/hw_irq.h

   1 /*
   2  * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
   3  */
   4 #ifndef _ASM_POWERPC_HW_IRQ_H
   5 #define _ASM_POWERPC_HW_IRQ_H
   6
   7 #ifdef __KERNEL__
   8
   9 #include <linux/config.h>
  10 #include <linux/errno.h>
  11 #include <asm/ptrace.h>
  12 #include <asm/processor.h>
  13
  14 extern void timer_interrupt(struct pt_regs *);
  15
  16 #ifdef CONFIG_PPC_ISERIES
  17
  18 extern unsigned long local_get_flags(void);
  19 extern unsigned long local_irq_disable(void);
  20 extern void local_irq_restore(unsigned long);
  21
  22 #define local_irq_enable()      local_irq_restore(1)
  23 #define local_save_flags(flags) ((flags) = local_get_flags())
  24 #define local_irq_save(flags)   ((flags) = local_irq_disable())
  25
  26 #define irqs_disabled()         (local_get_flags() == 0)
  27
  28 #else
  29
  30 #if defined(CONFIG_BOOKE)
  31 #define SET_MSR_EE(x)   mtmsr(x)
  32 #define local_irq_restore(flags)        __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory")
  33 #elif defined(__powerpc64__)
  34 #define SET_MSR_EE(x)   __mtmsrd(x, 1)
  35 #define local_irq_restore(flags) do { \
  36         __asm__ __volatile__("": : :"memory"); \
  37         __mtmsrd((flags), 1); \
  38 } while(0)
  39 #else
  40 #define SET_MSR_EE(x)   mtmsr(x)
  41 #define local_irq_restore(flags)        mtmsr(flags)
  42 #endif
  43
  44 static inline void local_irq_disable(void)
  45 {
  46 #ifdef CONFIG_BOOKE
  47         __asm__ __volatile__("wrteei 0": : :"memory");
  48 #else
  49         unsigned long msr;
  50         __asm__ __volatile__("": : :"memory");
  51         msr = mfmsr();
  52         SET_MSR_EE(msr & ~MSR_EE);
  53 #endif
  54 }
  55
  56 static inline void local_irq_enable(void)
  57 {
  58 #ifdef CONFIG_BOOKE
  59         __asm__ __volatile__("wrteei 1": : :"memory");
  60 #else
  61         unsigned long msr;
  62         __asm__ __volatile__("": : :"memory");
  63         msr = mfmsr();
  64         SET_MSR_EE(msr | MSR_EE);
  65 #endif
  66 }
  67
  68 static inline void local_irq_save_ptr(unsigned long *flags)
  69 {
  70         unsigned long msr;
  71         msr = mfmsr();
  72         *flags = msr;
  73 #ifdef CONFIG_BOOKE
  74         __asm__ __volatile__("wrteei 0": : :"memory");
  75 #else
  76         SET_MSR_EE(msr & ~MSR_EE);
  77 #endif
  78         __asm__ __volatile__("": : :"memory");
  79 }
  80
  81 #define local_save_flags(flags) ((flags) = mfmsr())
  82 #define local_irq_save(flags)   local_irq_save_ptr(&flags)
  83 #define irqs_disabled()         ((mfmsr() & MSR_EE) == 0)
  84
  85 #endif /* CONFIG_PPC_ISERIES */
  86
  87 #define mask_irq(irq)                                           \
  88         ({                                                      \
  89                 irq_desc_t *desc = get_irq_desc(irq);           \
  90                 if (desc->handler && desc->handler->disable)    \
  91                         desc->handler->disable(irq);            \
  92         })
  93 #define unmask_irq(irq)                                         \
  94         ({                                                      \
  95                 irq_desc_t *desc = get_irq_desc(irq);           \
  96                 if (desc->handler && desc->handler->enable)     \
  97                         desc->handler->enable(irq);             \
  98         })
  99 #define ack_irq(irq)                                            \
 100         ({                                                      \
 101                 irq_desc_t *desc = get_irq_desc(irq);           \
 102                 if (desc->handler && desc->handler->ack)        \
 103                         desc->handler->ack(irq);                \
 104         })
 105
 106 /* Should we handle this via lost interrupts and IPIs or should we don't care like
 107  * we do now ? --BenH.
 108  */
 109 struct hw_interrupt_type;
 110 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
 111
 112 #endif  /* __KERNEL__ */
 113 #endif  /* _ASM_POWERPC_HW_IRQ_H */