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#include <linux/preempt.h>
   6#include <asm/thread_info.h>
   7#include <asm/entry.h>
   8
   9static inline unsigned long arch_local_save_flags(void)
  10{
  11        unsigned long flags;
  12        asm volatile ("movew %%sr,%0" : "=d" (flags) : : "memory");
  13        return flags;
  14}
  15
  16static inline void arch_local_irq_disable(void)
  17{
  18#ifdef CONFIG_COLDFIRE
  19        asm volatile (
  20                "move   %/sr,%%d0       \n\t"
  21                "ori.l  #0x0700,%%d0    \n\t"
  22                "move   %%d0,%/sr       \n"
  23                : /* no outputs */
  24                :
  25                : "cc", "%d0", "memory");
  26#else
  27        asm volatile ("oriw  #0x0700,%%sr" : : : "memory");
  28#endif
  29}
  30
  31static inline void arch_local_irq_enable(void)
  32{
  33#if defined(CONFIG_COLDFIRE)
  34        asm volatile (
  35                "move   %/sr,%%d0       \n\t"
  36                "andi.l #0xf8ff,%%d0    \n\t"
  37                "move   %%d0,%/sr       \n"
  38                : /* no outputs */
  39                :
  40                : "cc", "%d0", "memory");
  41#else
  42# if defined(CONFIG_MMU)
  43        if (MACH_IS_Q40 || !hardirq_count())
  44# endif
  45                asm volatile (
  46                        "andiw %0,%%sr"
  47                        :
  48                        : "i" (ALLOWINT)
  49                        : "memory");
  50#endif
  51}
  52
  53static inline unsigned long arch_local_irq_save(void)
  54{
  55        unsigned long flags = arch_local_save_flags();
  56        arch_local_irq_disable();
  57        return flags;
  58}
  59
  60static inline void arch_local_irq_restore(unsigned long flags)
  61{
  62        asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory");
  63}
  64
  65static inline bool arch_irqs_disabled_flags(unsigned long flags)
  66{
  67        if (MACH_IS_ATARI) {
  68                /* Ignore HSYNC = ipl 2 on Atari */
  69                return (flags & ~(ALLOWINT | 0x200)) != 0;
  70        }
  71        return (flags & ~ALLOWINT) != 0;
  72}
  73
  74static inline bool arch_irqs_disabled(void)
  75{
  76        return arch_irqs_disabled_flags(arch_local_save_flags());
  77}
  78
  79#endif /* _M68K_IRQFLAGS_H */
  80