include/asm-sh/hardirq.h

   1 #ifndef __ASM_SH_HARDIRQ_H
   2 #define __ASM_SH_HARDIRQ_H
   3
   4 #include <linux/config.h>
   5 #include <linux/threads.h>
   6
   7 /* entry.S is sensitive to the offsets of these fields */
   8 typedef struct {
   9         unsigned int __softirq_active;
  10         unsigned int __softirq_mask;
  11         unsigned int __local_irq_count;
  12         unsigned int __local_bh_count;
  13         unsigned int __syscall_count;
  14 } ____cacheline_aligned irq_cpustat_t;
  15
  16 #include <linux/irq_cpustat.h>  /* Standard mappings for irq_cpustat_t above */
  17
  18 /*
  19  * Are we in an interrupt context? Either doing bottom half
  20  * or hardware interrupt processing?
  21  */
  22 #define in_interrupt() ({ int __cpu = smp_processor_id(); \
  23         (local_irq_count(__cpu) + local_bh_count(__cpu) != 0); })
  24
  25 #define in_irq() (local_irq_count(smp_processor_id()) != 0)
  26
  27 #ifndef CONFIG_SMP
  28
  29 #define hardirq_trylock(cpu)    (local_irq_count(cpu) == 0)
  30 #define hardirq_endlock(cpu)    do { } while (0)
  31
  32 #define irq_enter(cpu, irq)     (local_irq_count(cpu)++)
  33 #define irq_exit(cpu, irq)      (local_irq_count(cpu)--)
  34
  35 #define synchronize_irq()       barrier()
  36
  37 #else
  38
  39 #error Super-H SMP is not available
  40
  41 #endif /* CONFIG_SMP */
  42 #endif /* __ASM_SH_HARDIRQ_H */