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 <linux/compiler.h>
  11 #include <asm/ptrace.h>
  12 #include <asm/processor.h>
  13
  14 extern void timer_interrupt(struct pt_regs *);
  15
  16 #ifdef CONFIG_PPC64
  17 #include <asm/paca.h>
  18
  19 static inline unsigned long local_get_flags(void)
  20 {
  21         return get_paca()->soft_enabled;
  22 }
  23
  24 static inline unsigned long local_irq_disable(void)
  25 {
  26         unsigned long flag = get_paca()->soft_enabled;
  27         get_paca()->soft_enabled = 0;
  28         barrier();
  29         return flag;
  30 }
  31
  32 extern void local_irq_restore(unsigned long);
  33 extern void iseries_handle_interrupts(void);
  34
  35 #define local_irq_enable()      local_irq_restore(1)
  36 #define local_save_flags(flags) ((flags) = local_get_flags())
  37 #define local_irq_save(flags)   ((flags) = local_irq_disable())
  38
  39 #define irqs_disabled()         (local_get_flags() == 0)
  40
  41 #define hard_irq_enable()       __mtmsrd(mfmsr() | MSR_EE, 1)
  42 #define hard_irq_disable()      __mtmsrd(mfmsr() & ~MSR_EE, 1)
  43
  44 #else
  45
  46 #if defined(CONFIG_BOOKE)
  47 #define SET_MSR_EE(x)   mtmsr(x)
  48 #define local_irq_restore(flags)        __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory")
  49 #else
  50 #define SET_MSR_EE(x)   mtmsr(x)
  51 #define local_irq_restore(flags)        mtmsr(flags)
  52 #endif
  53
  54 static inline void local_irq_disable(void)
  55 {
  56 #ifdef CONFIG_BOOKE
  57         __asm__ __volatile__("wrteei 0": : :"memory");
  58 #else
  59         unsigned long msr;
  60         __asm__ __volatile__("": : :"memory");
  61         msr = mfmsr();
  62         SET_MSR_EE(msr & ~MSR_EE);
  63 #endif
  64 }
  65
  66 static inline void local_irq_enable(void)
  67 {
  68 #ifdef CONFIG_BOOKE
  69         __asm__ __volatile__("wrteei 1": : :"memory");
  70 #else
  71         unsigned long msr;
  72         __asm__ __volatile__("": : :"memory");
  73         msr = mfmsr();
  74         SET_MSR_EE(msr | MSR_EE);
  75 #endif
  76 }
  77
  78 static inline void local_irq_save_ptr(unsigned long *flags)
  79 {
  80         unsigned long msr;
  81         msr = mfmsr();
  82         *flags = msr;
  83 #ifdef CONFIG_BOOKE
  84         __asm__ __volatile__("wrteei 0": : :"memory");
  85 #else
  86         SET_MSR_EE(msr & ~MSR_EE);
  87 #endif
  88         __asm__ __volatile__("": : :"memory");
  89 }
  90
  91 #define local_save_flags(flags) ((flags) = mfmsr())
  92 #define local_irq_save(flags)   local_irq_save_ptr(&flags)
  93 #define irqs_disabled()         ((mfmsr() & MSR_EE) == 0)
  94
  95 #endif /* CONFIG_PPC64 */
  96
  97 #define mask_irq(irq)                                           \
  98         ({                                                      \
  99                 irq_desc_t *desc = get_irq_desc(irq);           \
 100                 if (desc->chip && desc->chip->disable)  \
 101                         desc->chip->disable(irq);               \
 102         })
 103 #define unmask_irq(irq)                                         \
 104         ({                                                      \
 105                 irq_desc_t *desc = get_irq_desc(irq);           \
 106                 if (desc->chip && desc->chip->enable)   \
 107                         desc->chip->enable(irq);                \
 108         })
 109 #define ack_irq(irq)                                            \
 110         ({                                                      \
 111                 irq_desc_t *desc = get_irq_desc(irq);           \
 112                 if (desc->chip && desc->chip->ack)      \
 113                         desc->chip->ack(irq);           \
 114         })
 115
 116 /*
 117  * interrupt-retrigger: should we handle this via lost interrupts and IPIs
 118  * or should we not care like we do now ? --BenH.
 119  */
 120 struct hw_interrupt_type;
 121
 122 #endif  /* __KERNEL__ */
 123 #endif  /* _ASM_POWERPC_HW_IRQ_H */