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