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         unsigned long flags;
  22
  23         __asm__ __volatile__("lbz %0,%1(13)"
  24         : "=r" (flags)
  25         : "i" (offsetof(struct paca_struct, soft_enabled)));
  26
  27         return flags;
  28 }
  29
  30 static inline unsigned long local_irq_disable(void)
  31 {
  32         unsigned long flags, zero;
  33
  34         __asm__ __volatile__("li %1,0; lbz %0,%2(13); stb %1,%2(13)"
  35         : "=r" (flags), "=&r" (zero)
  36         : "i" (offsetof(struct paca_struct, soft_enabled))
  37         : "memory");
  38
  39         return flags;
  40 }
  41
  42 extern void local_irq_restore(unsigned long);
  43 extern void iseries_handle_interrupts(void);
  44
  45 #define local_irq_enable()      local_irq_restore(1)
  46 #define local_save_flags(flags) ((flags) = local_get_flags())
  47 #define local_irq_save(flags)   ((flags) = local_irq_disable())
  48
  49 #define irqs_disabled()         (local_get_flags() == 0)
  50
  51 #define hard_irq_enable()       __mtmsrd(mfmsr() | MSR_EE, 1)
  52 #define hard_irq_disable()      __mtmsrd(mfmsr() & ~MSR_EE, 1)
  53
  54 #else
  55
  56 #if defined(CONFIG_BOOKE)
  57 #define SET_MSR_EE(x)   mtmsr(x)
  58 #define local_irq_restore(flags)        __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory")
  59 #else
  60 #define SET_MSR_EE(x)   mtmsr(x)
  61 #define local_irq_restore(flags)        mtmsr(flags)
  62 #endif
  63
  64 static inline void local_irq_disable(void)
  65 {
  66 #ifdef CONFIG_BOOKE
  67         __asm__ __volatile__("wrteei 0": : :"memory");
  68 #else
  69         unsigned long msr;
  70         __asm__ __volatile__("": : :"memory");
  71         msr = mfmsr();
  72         SET_MSR_EE(msr & ~MSR_EE);
  73 #endif
  74 }
  75
  76 static inline void local_irq_enable(void)
  77 {
  78 #ifdef CONFIG_BOOKE
  79         __asm__ __volatile__("wrteei 1": : :"memory");
  80 #else
  81         unsigned long msr;
  82         __asm__ __volatile__("": : :"memory");
  83         msr = mfmsr();
  84         SET_MSR_EE(msr | MSR_EE);
  85 #endif
  86 }
  87
  88 static inline void local_irq_save_ptr(unsigned long *flags)
  89 {
  90         unsigned long msr;
  91         msr = mfmsr();
  92         *flags = msr;
  93 #ifdef CONFIG_BOOKE
  94         __asm__ __volatile__("wrteei 0": : :"memory");
  95 #else
  96         SET_MSR_EE(msr & ~MSR_EE);
  97 #endif
  98         __asm__ __volatile__("": : :"memory");
  99 }
 100
 101 #define local_save_flags(flags) ((flags) = mfmsr())
 102 #define local_irq_save(flags)   local_irq_save_ptr(&flags)
 103 #define irqs_disabled()         ((mfmsr() & MSR_EE) == 0)
 104
 105 #endif /* CONFIG_PPC64 */
 106
 107 #define mask_irq(irq)                                           \
 108         ({                                                      \
 109                 irq_desc_t *desc = get_irq_desc(irq);           \
 110                 if (desc->chip && desc->chip->disable)  \
 111                         desc->chip->disable(irq);               \
 112         })
 113 #define unmask_irq(irq)                                         \
 114         ({                                                      \
 115                 irq_desc_t *desc = get_irq_desc(irq);           \
 116                 if (desc->chip && desc->chip->enable)   \
 117                         desc->chip->enable(irq);                \
 118         })
 119 #define ack_irq(irq)                                            \
 120         ({                                                      \
 121                 irq_desc_t *desc = get_irq_desc(irq);           \
 122                 if (desc->chip && desc->chip->ack)      \
 123                         desc->chip->ack(irq);           \
 124         })
 125
 126 /*
 127  * interrupt-retrigger: should we handle this via lost interrupts and IPIs
 128  * or should we not care like we do now ? --BenH.
 129  */
 130 struct hw_interrupt_type;
 131
 132 #endif  /* __KERNEL__ */
 133 #endif  /* _ASM_POWERPC_HW_IRQ_H */