arch/sh/include/asm/irqflags.h

   1 #ifndef __ASM_SH_IRQFLAGS_H
   2 #define __ASM_SH_IRQFLAGS_H
   3
   4 static inline void raw_local_irq_enable(void)
   5 {
   6         unsigned long __dummy0, __dummy1;
   7
   8         __asm__ __volatile__ (
   9                 "stc    sr, %0\n\t"
  10                 "and    %1, %0\n\t"
  11 #ifdef CONFIG_CPU_HAS_SR_RB
  12                 "stc    r6_bank, %1\n\t"
  13                 "or     %1, %0\n\t"
  14 #endif
  15                 "ldc    %0, sr\n\t"
  16                 : "=&r" (__dummy0), "=r" (__dummy1)
  17                 : "1" (~0x000000f0)
  18                 : "memory"
  19         );
  20 }
  21
  22 static inline void raw_local_irq_disable(void)
  23 {
  24         unsigned long flags;
  25
  26         __asm__ __volatile__ (
  27                 "stc    sr, %0\n\t"
  28                 "or     #0xf0, %0\n\t"
  29                 "ldc    %0, sr\n\t"
  30                 : "=&z" (flags)
  31                 : /* no inputs */
  32                 : "memory"
  33         );
  34 }
  35
  36 static inline void set_bl_bit(void)
  37 {
  38         unsigned long __dummy0, __dummy1;
  39
  40         __asm__ __volatile__ (
  41                 "stc    sr, %0\n\t"
  42                 "or     %2, %0\n\t"
  43                 "and    %3, %0\n\t"
  44                 "ldc    %0, sr\n\t"
  45                 : "=&r" (__dummy0), "=r" (__dummy1)
  46                 : "r" (0x10000000), "r" (0xffffff0f)
  47                 : "memory"
  48         );
  49 }
  50
  51 static inline void clear_bl_bit(void)
  52 {
  53         unsigned long __dummy0, __dummy1;
  54
  55         __asm__ __volatile__ (
  56                 "stc    sr, %0\n\t"
  57                 "and    %2, %0\n\t"
  58                 "ldc    %0, sr\n\t"
  59                 : "=&r" (__dummy0), "=r" (__dummy1)
  60                 : "1" (~0x10000000)
  61                 : "memory"
  62         );
  63 }
  64
  65 static inline unsigned long __raw_local_save_flags(void)
  66 {
  67         unsigned long flags;
  68
  69         __asm__ __volatile__ (
  70                 "stc    sr, %0\n\t"
  71                 "and    #0xf0, %0\n\t"
  72                 : "=&z" (flags)
  73                 : /* no inputs */
  74                 : "memory"
  75         );
  76
  77         return flags;
  78 }
  79
  80 #define raw_local_save_flags(flags) \
  81                 do { (flags) = __raw_local_save_flags(); } while (0)
  82
  83 static inline int raw_irqs_disabled_flags(unsigned long flags)
  84 {
  85         return (flags != 0);
  86 }
  87
  88 static inline int raw_irqs_disabled(void)
  89 {
  90         unsigned long flags = __raw_local_save_flags();
  91
  92         return raw_irqs_disabled_flags(flags);
  93 }
  94
  95 static inline unsigned long __raw_local_irq_save(void)
  96 {
  97         unsigned long flags, __dummy;
  98
  99         __asm__ __volatile__ (
 100                 "stc    sr, %1\n\t"
 101                 "mov    %1, %0\n\t"
 102                 "or     #0xf0, %0\n\t"
 103                 "ldc    %0, sr\n\t"
 104                 "mov    %1, %0\n\t"
 105                 "and    #0xf0, %0\n\t"
 106                 : "=&z" (flags), "=&r" (__dummy)
 107                 : /* no inputs */
 108                 : "memory"
 109         );
 110
 111         return flags;
 112 }
 113
 114 #define raw_local_irq_save(flags) \
 115                 do { (flags) = __raw_local_irq_save(); } while (0)
 116
 117 #define local_irq_save raw_local_irq_save
 118
 119 static inline void raw_local_irq_restore(unsigned long flags)
 120 {
 121         if ((flags & 0xf0) != 0xf0)
 122                 raw_local_irq_enable();
 123 }
 124 #define local_irq_restore raw_local_irq_restore
 125
 126 #endif /* __ASM_SH_IRQFLAGS_H */