include/asm-i386/mach-xen/asm/irqflags.h

   1 /*
   2  * include/asm-i386/irqflags.h
   3  *
   4  * IRQ flags handling
   5  *
   6  * This file gets included from lowlevel asm headers too, to provide
   7  * wrapped versions of the local_irq_*() APIs, based on the
   8  * raw_local_irq_*() functions from the lowlevel headers.
   9  */
  10 #ifndef _ASM_IRQFLAGS_H
  11 #define _ASM_IRQFLAGS_H
  12
  13 #ifndef __ASSEMBLY__
  14
  15 #define raw_local_save_flags(flags) \
  16                 do { (flags) = __raw_local_save_flags(); } while (0)
  17
  18 unsigned long __raw_local_save_flags(void);
  19 void raw_local_irq_restore(unsigned long flags);
  20 void raw_local_irq_disable(void);
  21 void raw_local_irq_enable(void);
  22
  23 /*
  24  * Used in the idle loop; sti takes one instruction cycle
  25  * to complete:
  26  */
  27 void raw_safe_halt(void);
  28
  29 /*
  30  * Used when interrupts are already enabled or to
  31  * shutdown the processor:
  32  */
  33 void halt(void);
  34
  35 static inline int raw_irqs_disabled_flags(unsigned long flags)
  36 {
  37         return flags != 0;
  38 }
  39
  40 int raw_irqs_disabled(void);
  41
  42 /*
  43  * For spinlocks, etc:
  44  */
  45 unsigned long __raw_local_irq_save(void);
  46 #define raw_local_irq_save(flags) \
  47                 do { (flags) = __raw_local_irq_save(); } while (0)
  48
  49 #endif /* __ASSEMBLY__ */
  50
  51 /*
  52  * Do the CPU's IRQ-state tracing from assembly code. We call a
  53  * C function, so save all the C-clobbered registers:
  54  */
  55 #ifdef CONFIG_TRACE_IRQFLAGS
  56
  57 # define TRACE_IRQS_ON                          \
  58         pushl %eax;                             \
  59         pushl %ecx;                             \
  60         pushl %edx;                             \
  61         call trace_hardirqs_on;                 \
  62         popl %edx;                              \
  63         popl %ecx;                              \
  64         popl %eax;
  65
  66 # define TRACE_IRQS_OFF                         \
  67         pushl %eax;                             \
  68         pushl %ecx;                             \
  69         pushl %edx;                             \
  70         call trace_hardirqs_off;                \
  71         popl %edx;                              \
  72         popl %ecx;                              \
  73         popl %eax;
  74
  75 #else
  76 # define TRACE_IRQS_ON
  77 # define TRACE_IRQS_OFF
  78 #endif
  79
  80 #endif