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 #define  hard_irq_disable()                     \
  55         do {                                    \
  56                 __hard_irq_disable();           \
  57                 get_paca()->soft_enabled = 0;   \
  58                 get_paca()->hard_enabled = 0;   \
  59         } while(0)
  60
  61 #else
  62
  63 #if defined(CONFIG_BOOKE)
  64 #define SET_MSR_EE(x)   mtmsr(x)
  65 #define local_irq_restore(flags)        __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory")
  66 #else
  67 #define SET_MSR_EE(x)   mtmsr(x)
  68 #define local_irq_restore(flags)        mtmsr(flags)
  69 #endif
  70
  71 static inline void local_irq_disable(void)
  72 {
  73 #ifdef CONFIG_BOOKE
  74         __asm__ __volatile__("wrteei 0": : :"memory");
  75 #else
  76         unsigned long msr;
  77         __asm__ __volatile__("": : :"memory");
  78         msr = mfmsr();
  79         SET_MSR_EE(msr & ~MSR_EE);
  80 #endif
  81 }
  82
  83 static inline void local_irq_enable(void)
  84 {
  85 #ifdef CONFIG_BOOKE
  86         __asm__ __volatile__("wrteei 1": : :"memory");
  87 #else
  88         unsigned long msr;
  89         __asm__ __volatile__("": : :"memory");
  90         msr = mfmsr();
  91         SET_MSR_EE(msr | MSR_EE);
  92 #endif
  93 }
  94
  95 static inline void local_irq_save_ptr(unsigned long *flags)
  96 {
  97         unsigned long msr;
  98         msr = mfmsr();
  99         *flags = msr;
 100 #ifdef CONFIG_BOOKE
 101         __asm__ __volatile__("wrteei 0": : :"memory");
 102 #else
 103         SET_MSR_EE(msr & ~MSR_EE);
 104 #endif
 105         __asm__ __volatile__("": : :"memory");
 106 }
 107
 108 #define local_save_flags(flags) ((flags) = mfmsr())
 109 #define local_irq_save(flags)   local_irq_save_ptr(&flags)
 110 #define irqs_disabled()         ((mfmsr() & MSR_EE) == 0)
 111
 112 #define hard_irq_enable()       local_irq_enable()
 113 #define hard_irq_disable()      local_irq_disable()
 114
 115 #endif /* CONFIG_PPC64 */
 116
 117 /*
 118  * interrupt-retrigger: should we handle this via lost interrupts and IPIs
 119  * or should we not care like we do now ? --BenH.
 120  */
 121 struct hw_interrupt_type;
 122
 123 #endif  /* __KERNEL__ */
 124 #endif  /* _ASM_POWERPC_HW_IRQ_H */