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