arch/powerpc/include/asm/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 #ifdef CONFIG_PPC_BOOK3E
  53 #define __hard_irq_enable()     __asm__ __volatile__("wrteei 1": : :"memory");
  54 #define __hard_irq_disable()    __asm__ __volatile__("wrteei 0": : :"memory");
  55 #else
  56 #define __hard_irq_enable()     __mtmsrd(mfmsr() | MSR_EE, 1)
  57 #define __hard_irq_disable()    __mtmsrd(mfmsr() & ~MSR_EE, 1)
  58 #endif
  59
  60 #define  hard_irq_disable()                     \
  61         do {                                    \
  62                 __hard_irq_disable();           \
  63                 get_paca()->soft_enabled = 0;   \
  64                 get_paca()->hard_enabled = 0;   \
  65         } while(0)
  66
  67 static inline int irqs_disabled_flags(unsigned long flags)
  68 {
  69         return flags == 0;
  70 }
  71
  72 #else
  73
  74 #if defined(CONFIG_BOOKE)
  75 #define SET_MSR_EE(x)   mtmsr(x)
  76 #define raw_local_irq_restore(flags)    __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory")
  77 #else
  78 #define SET_MSR_EE(x)   mtmsr(x)
  79 #define raw_local_irq_restore(flags)    mtmsr(flags)
  80 #endif
  81
  82 static inline void raw_local_irq_disable(void)
  83 {
  84 #ifdef CONFIG_BOOKE
  85         __asm__ __volatile__("wrteei 0": : :"memory");
  86 #else
  87         unsigned long msr;
  88
  89         msr = mfmsr();
  90         SET_MSR_EE(msr & ~MSR_EE);
  91 #endif
  92 }
  93
  94 static inline void raw_local_irq_enable(void)
  95 {
  96 #ifdef CONFIG_BOOKE
  97         __asm__ __volatile__("wrteei 1": : :"memory");
  98 #else
  99         unsigned long msr;
 100
 101         msr = mfmsr();
 102         SET_MSR_EE(msr | MSR_EE);
 103 #endif
 104 }
 105
 106 static inline void raw_local_irq_save_ptr(unsigned long *flags)
 107 {
 108         unsigned long msr;
 109         msr = mfmsr();
 110         *flags = msr;
 111 #ifdef CONFIG_BOOKE
 112         __asm__ __volatile__("wrteei 0": : :"memory");
 113 #else
 114         SET_MSR_EE(msr & ~MSR_EE);
 115 #endif
 116 }
 117
 118 #define raw_local_save_flags(flags)     ((flags) = mfmsr())
 119 #define raw_local_irq_save(flags)       raw_local_irq_save_ptr(&flags)
 120 #define raw_irqs_disabled()             ((mfmsr() & MSR_EE) == 0)
 121 #define raw_irqs_disabled_flags(flags)  (((flags) & MSR_EE) == 0)
 122
 123 #define hard_irq_disable()              raw_local_irq_disable()
 124
 125 static inline int irqs_disabled_flags(unsigned long flags)
 126 {
 127         return (flags & MSR_EE) == 0;
 128 }
 129
 130 #endif /* CONFIG_PPC64 */
 131
 132 /*
 133  * interrupt-retrigger: should we handle this via lost interrupts and IPIs
 134  * or should we not care like we do now ? --BenH.
 135  */
 136 struct irq_chip;
 137
 138 #ifdef CONFIG_PERF_EVENTS
 139
 140 #ifdef CONFIG_PPC64
 141 static inline unsigned long test_perf_event_pending(void)
 142 {
 143         unsigned long x;
 144
 145         asm volatile("lbz %0,%1(13)"
 146                 : "=r" (x)
 147                 : "i" (offsetof(struct paca_struct, perf_event_pending)));
 148         return x;
 149 }
 150
 151 static inline void set_perf_event_pending(void)
 152 {
 153         asm volatile("stb %0,%1(13)" : :
 154                 "r" (1),
 155                 "i" (offsetof(struct paca_struct, perf_event_pending)));
 156 }
 157
 158 static inline void clear_perf_event_pending(void)
 159 {
 160         asm volatile("stb %0,%1(13)" : :
 161                 "r" (0),
 162                 "i" (offsetof(struct paca_struct, perf_event_pending)));
 163 }
 164 #endif /* CONFIG_PPC64 */
 165
 166 #else  /* CONFIG_PERF_EVENTS */
 167
 168 static inline unsigned long test_perf_event_pending(void)
 169 {
 170         return 0;
 171 }
 172
 173 static inline void clear_perf_event_pending(void) {}
 174 #endif /* CONFIG_PERF_EVENTS */
 175
 176 #endif  /* __KERNEL__ */
 177 #endif  /* _ASM_POWERPC_HW_IRQ_H */