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 raw_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 raw_local_irq_restore(unsigned long);
  43 extern void iseries_handle_interrupts(void);
  44
  45 #define raw_local_irq_enable()          raw_local_irq_restore(1)
  46 #define raw_local_save_flags(flags)     ((flags) = local_get_flags())
  47 #define raw_local_irq_save(flags)       ((flags) = raw_local_irq_disable())
  48
  49 #define raw_irqs_disabled()             (local_get_flags() == 0)
  50 #define raw_irqs_disabled_flags(flags)  ((flags) == 0)
  51
  52 #define __hard_irq_enable()     __mtmsrd(mfmsr() | MSR_EE, 1)
  53 #define __hard_irq_disable()    __mtmsrd(mfmsr() & ~MSR_EE, 1)
  54
  55 #define  hard_irq_disable()                     \
  56         do {                                    \
  57                 __hard_irq_disable();           \
  58                 get_paca()->soft_enabled = 0;   \
  59                 get_paca()->hard_enabled = 0;   \
  60         } while(0)
  61
  62 #else
  63
  64 #if defined(CONFIG_BOOKE)
  65 #define SET_MSR_EE(x)   mtmsr(x)
  66 #define local_irq_restore(flags)        __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory")
  67 #else
  68 #define SET_MSR_EE(x)   mtmsr(x)
  69 #define local_irq_restore(flags)        mtmsr(flags)
  70 #endif
  71
  72 static inline void local_irq_disable(void)
  73 {
  74 #ifdef CONFIG_BOOKE
  75         __asm__ __volatile__("wrteei 0": : :"memory");
  76 #else
  77         unsigned long msr;
  78         __asm__ __volatile__("": : :"memory");
  79         msr = mfmsr();
  80         SET_MSR_EE(msr & ~MSR_EE);
  81 #endif
  82 }
  83
  84 static inline void local_irq_enable(void)
  85 {
  86 #ifdef CONFIG_BOOKE
  87         __asm__ __volatile__("wrteei 1": : :"memory");
  88 #else
  89         unsigned long msr;
  90         __asm__ __volatile__("": : :"memory");
  91         msr = mfmsr();
  92         SET_MSR_EE(msr | MSR_EE);
  93 #endif
  94 }
  95
  96 static inline void local_irq_save_ptr(unsigned long *flags)
  97 {
  98         unsigned long msr;
  99         msr = mfmsr();
 100         *flags = msr;
 101 #ifdef CONFIG_BOOKE
 102         __asm__ __volatile__("wrteei 0": : :"memory");
 103 #else
 104         SET_MSR_EE(msr & ~MSR_EE);
 105 #endif
 106         __asm__ __volatile__("": : :"memory");
 107 }
 108
 109 #define local_save_flags(flags) ((flags) = mfmsr())
 110 #define local_irq_save(flags)   local_irq_save_ptr(&flags)
 111 #define irqs_disabled()         ((mfmsr() & MSR_EE) == 0)
 112
 113 #define hard_irq_enable()       local_irq_enable()
 114 #define hard_irq_disable()      local_irq_disable()
 115
 116 #endif /* CONFIG_PPC64 */
 117
 118 /*
 119  * interrupt-retrigger: should we handle this via lost interrupts and IPIs
 120  * or should we not care like we do now ? --BenH.
 121  */
 122 struct hw_interrupt_type;
 123
 124 #endif  /* __KERNEL__ */
 125 #endif  /* _ASM_POWERPC_HW_IRQ_H */