include/asm-ia64/hardirq.h

   1 #ifndef _ASM_IA64_HARDIRQ_H
   2 #define _ASM_IA64_HARDIRQ_H
   3
   4 /*
   5  * Modified 1998-2002, 2004 Hewlett-Packard Co
   6  *      David Mosberger-Tang <davidm@hpl.hp.com>
   7  */
   8
   9 #include <linux/config.h>
  10
  11 #include <linux/threads.h>
  12 #include <linux/irq.h>
  13
  14 #include <asm/processor.h>
  15
  16 /*
  17  * No irq_cpustat_t for IA-64.  The data is held in the per-CPU data structure.
  18  */
  19
  20 #define __ARCH_IRQ_STAT 1
  21
  22 #define softirq_pending(cpu)            (cpu_data(cpu)->softirq_pending)
  23 #define syscall_count(cpu)              /* unused on IA-64 */
  24 #define ksoftirqd_task(cpu)             (cpu_data(cpu)->ksoftirqd)
  25 #define nmi_count(cpu)                  0
  26
  27 #define local_softirq_pending()         (local_cpu_data->softirq_pending)
  28 #define local_syscall_count()           /* unused on IA-64 */
  29 #define local_ksoftirqd_task()          (local_cpu_data->ksoftirqd)
  30 #define local_nmi_count()               0
  31
  32 /*
  33  * We put the hardirq and softirq counter into the preemption counter. The bitmask has the
  34  * following meaning:
  35  *
  36  * - bits 0-7 are the preemption count (max preemption depth: 256)
  37  * - bits 8-15 are the softirq count (max # of softirqs: 256)
  38  * - bits 16-29 are the hardirq count (max # of hardirqs: 16384)
  39  *
  40  * - (bit 63 is the PREEMPT_ACTIVE flag---not currently implemented.)
  41  *
  42  * PREEMPT_MASK: 0x000000ff
  43  * SOFTIRQ_MASK: 0x0000ff00
  44  * HARDIRQ_MASK: 0x3fff0000
  45  */
  46
  47 #define PREEMPT_BITS    8
  48 #define SOFTIRQ_BITS    8
  49 #define HARDIRQ_BITS    14
  50
  51 #define PREEMPT_SHIFT   0
  52 #define SOFTIRQ_SHIFT   (PREEMPT_SHIFT + PREEMPT_BITS)
  53 #define HARDIRQ_SHIFT   (SOFTIRQ_SHIFT + SOFTIRQ_BITS)
  54
  55 /*
  56  * The hardirq mask has to be large enough to have space for potentially all IRQ sources
  57  * in the system nesting on a single CPU:
  58  */
  59 #if (1 << HARDIRQ_BITS) < NR_IRQS
  60 # error HARDIRQ_BITS is too low!
  61 #endif
  62
  63 extern void __iomem *ipi_base_addr;
  64
  65 #endif /* _ASM_IA64_HARDIRQ_H */