include/asm-v850/hardirq.h

   1 #ifndef __V850_HARDIRQ_H__
   2 #define __V850_HARDIRQ_H__
   3
   4 #include <linux/config.h>
   5 #include <linux/threads.h>
   6 #include <linux/cache.h>
   7
   8 typedef struct {
   9         unsigned int __softirq_pending;
  10         unsigned int __syscall_count;
  11         struct task_struct * __ksoftirqd_task;
  12 } ____cacheline_aligned irq_cpustat_t;
  13
  14 #include <linux/irq_cpustat.h>  /* Standard mappings for irq_cpustat_t above */
  15
  16 /*
  17  * We put the hardirq and softirq counter into the preemption
  18  * counter. The bitmask has the following meaning:
  19  *
  20  * - bits 0-7 are the preemption count (max preemption depth: 256)
  21  * - bits 8-15 are the softirq count (max # of softirqs: 256)
  22  * - bits 16-23 are the hardirq count (max # of hardirqs: 256)
  23  *
  24  * - ( bit 26 is the PREEMPT_ACTIVE flag. )
  25  *
  26  * PREEMPT_MASK: 0x000000ff
  27  * HARDIRQ_MASK: 0x0000ff00
  28  * SOFTIRQ_MASK: 0x00ff0000
  29  */
  30
  31 #define PREEMPT_BITS    8
  32 #define SOFTIRQ_BITS    8
  33 #define HARDIRQ_BITS    8
  34
  35 #define PREEMPT_SHIFT   0
  36 #define SOFTIRQ_SHIFT   (PREEMPT_SHIFT + PREEMPT_BITS)
  37 #define HARDIRQ_SHIFT   (SOFTIRQ_SHIFT + SOFTIRQ_BITS)
  38
  39 /*
  40  * The hardirq mask has to be large enough to have
  41  * space for potentially all IRQ sources in the system
  42  * nesting on a single CPU:
  43  */
  44 #if (1 << HARDIRQ_BITS) < NR_IRQS
  45 # error HARDIRQ_BITS is too low!
  46 #endif
  47
  48 #define irq_enter()             (preempt_count() += HARDIRQ_OFFSET)
  49 #define irq_exit()                                                            \
  50 do {                                                                          \
  51         preempt_count() -= IRQ_EXIT_OFFSET;                                   \
  52         if (!in_interrupt() && softirq_pending(smp_processor_id()))           \
  53                 do_softirq();                                                 \
  54         preempt_enable_no_resched();                                          \
  55 } while (0)
  56
  57 #endif /* __V850_HARDIRQ_H__ */