LXR linux/arch/powerpc/include/asm/hw

   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
  14extern void timer_interrupt(struct pt_regs *);
  15
  16#ifdef CONFIG_PPC64
  17#include <asm/paca.h>
  18
  19static 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
  30static 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
  42extern void raw_local_irq_restore(unsigned long);
  43extern 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
  62static inline int irqs_disabled_flags(unsigned long flags)
  63{
  64        return flags == 0;
  65}
  66
  67#else
  68
  69#if defined(CONFIG_BOOKE)
  70#define SET_MSR_EE(x)   mtmsr(x)
  71#define local_irq_restore(flags)        __asm__ __volatile__("wrtee %0" : : "r" (flags) : "memory")
  72#else
  73#define SET_MSR_EE(x)   mtmsr(x)
  74#define local_irq_restore(flags)        mtmsr(flags)
  75#endif
  76
  77static inline void local_irq_disable(void)
  78{
  79#ifdef CONFIG_BOOKE
  80        __asm__ __volatile__("wrteei 0": : :"memory");
  81#else
  82        unsigned long msr;
  83        __asm__ __volatile__("": : :"memory");
  84        msr = mfmsr();
  85        SET_MSR_EE(msr & ~MSR_EE);
  86#endif
  87}
  88
  89static inline void local_irq_enable(void)
  90{
  91#ifdef CONFIG_BOOKE
  92        __asm__ __volatile__("wrteei 1": : :"memory");
  93#else
  94        unsigned long msr;
  95        __asm__ __volatile__("": : :"memory");
  96        msr = mfmsr();
  97        SET_MSR_EE(msr | MSR_EE);
  98#endif
  99}
 100
 101static inline void local_irq_save_ptr(unsigned long *flags)
 102{
 103        unsigned long msr;
 104        msr = mfmsr();
 105        *flags = msr;
 106#ifdef CONFIG_BOOKE
 107        __asm__ __volatile__("wrteei 0": : :"memory");
 108#else
 109        SET_MSR_EE(msr & ~MSR_EE);
 110#endif
 111        __asm__ __volatile__("": : :"memory");
 112}
 113
 114#define local_save_flags(flags) ((flags) = mfmsr())
 115#define local_irq_save(flags)   local_irq_save_ptr(&flags)
 116#define irqs_disabled()         ((mfmsr() & MSR_EE) == 0)
 117
 118#define hard_irq_enable()       local_irq_enable()
 119#define hard_irq_disable()      local_irq_disable()
 120
 121static inline int irqs_disabled_flags(unsigned long flags)
 122{
 123        return (flags & MSR_EE) == 0;
 124}
 125
 126#endif /* CONFIG_PPC64 */
 127
 128/*
 129 * interrupt-retrigger: should we handle this via lost interrupts and IPIs
 130 * or should we not care like we do now ? --BenH.
 131 */
 132struct irq_chip;
 133
 134#endif  /* __KERNEL__ */
 135#endif  /* _ASM_POWERPC_HW_IRQ_H */
 136