LXR linux/arch/m68k/include/asm/irqflags.h

   1#ifndef _M68K_IRQFLAGS_H
   2#define _M68K_IRQFLAGS_H
   3
   4#include <linux/types.h>
   5#ifdef CONFIG_MMU
   6#include <linux/hardirq.h>
   7#endif
   8#include <linux/preempt.h>
   9#include <asm/thread_info.h>
  10#include <asm/entry.h>
  11
  12static inline unsigned long arch_local_save_flags(void)
  13{
  14        unsigned long flags;
  15        asm volatile ("movew %%sr,%0" : "=d" (flags) : : "memory");
  16        return flags;
  17}
  18
  19static inline void arch_local_irq_disable(void)
  20{
  21#ifdef CONFIG_COLDFIRE
  22        asm volatile (
  23                "move   %/sr,%%d0       \n\t"
  24                "ori.l  #0x0700,%%d0    \n\t"
  25                "move   %%d0,%/sr       \n"
  26                : /* no outputs */
  27                :
  28                : "cc", "%d0", "memory");
  29#else
  30        asm volatile ("oriw  #0x0700,%%sr" : : : "memory");
  31#endif
  32}
  33
  34static inline void arch_local_irq_enable(void)
  35{
  36#if defined(CONFIG_COLDFIRE)
  37        asm volatile (
  38                "move   %/sr,%%d0       \n\t"
  39                "andi.l #0xf8ff,%%d0    \n\t"
  40                "move   %%d0,%/sr       \n"
  41                : /* no outputs */
  42                :
  43                : "cc", "%d0", "memory");
  44#else
  45# if defined(CONFIG_MMU)
  46        if (MACH_IS_Q40 || !hardirq_count())
  47# endif
  48                asm volatile (
  49                        "andiw %0,%%sr"
  50                        :
  51                        : "i" (ALLOWINT)
  52                        : "memory");
  53#endif
  54}
  55
  56static inline unsigned long arch_local_irq_save(void)
  57{
  58        unsigned long flags = arch_local_save_flags();
  59        arch_local_irq_disable();
  60        return flags;
  61}
  62
  63static inline void arch_local_irq_restore(unsigned long flags)
  64{
  65        asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory");
  66}
  67
  68static inline bool arch_irqs_disabled_flags(unsigned long flags)
  69{
  70        return (flags & ~ALLOWINT) != 0;
  71}
  72
  73static inline bool arch_irqs_disabled(void)
  74{
  75        return arch_irqs_disabled_flags(arch_local_save_flags());
  76}
  77
  78#endif /* _M68K_IRQFLAGS_H */
  79