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
  12 static 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
  19 static 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
  34 static 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
  56 static 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
  63 static inline void arch_local_irq_restore(unsigned long flags)
  64 {
  65         asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory");
  66 }
  67
  68 static inline bool arch_irqs_disabled_flags(unsigned long flags)
  69 {
  70         return (flags & ~ALLOWINT) != 0;
  71 }
  72
  73 static inline bool arch_irqs_disabled(void)
  74 {
  75         return arch_irqs_disabled_flags(arch_local_save_flags());
  76 }
  77
  78 #endif /* _M68K_IRQFLAGS_H */