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
   9 static 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
  16 static 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
  31 static 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
  53 static 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
  60 static inline void arch_local_irq_restore(unsigned long flags)
  61 {
  62         asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory");
  63 }
  64
  65 static 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
  74 static inline bool arch_irqs_disabled(void)
  75 {
  76         return arch_irqs_disabled_flags(arch_local_save_flags());
  77 }
  78
  79 #endif /* _M68K_IRQFLAGS_H */