arch/s390/include/asm/irq.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_IRQ_H
   3 #define _ASM_IRQ_H
   4
   5 #define EXT_INTERRUPT   0
   6 #define IO_INTERRUPT    1
   7 #define THIN_INTERRUPT  2
   8
   9 #define NR_IRQS_BASE    3
  10
  11 #define NR_IRQS NR_IRQS_BASE
  12 #define NR_IRQS_LEGACY NR_IRQS_BASE
  13
  14 /* External interruption codes */
  15 #define EXT_IRQ_INTERRUPT_KEY   0x0040
  16 #define EXT_IRQ_CLK_COMP        0x1004
  17 #define EXT_IRQ_CPU_TIMER       0x1005
  18 #define EXT_IRQ_WARNING_TRACK   0x1007
  19 #define EXT_IRQ_MALFUNC_ALERT   0x1200
  20 #define EXT_IRQ_EMERGENCY_SIG   0x1201
  21 #define EXT_IRQ_EXTERNAL_CALL   0x1202
  22 #define EXT_IRQ_TIMING_ALERT    0x1406
  23 #define EXT_IRQ_MEASURE_ALERT   0x1407
  24 #define EXT_IRQ_SERVICE_SIG     0x2401
  25 #define EXT_IRQ_CP_SERVICE      0x2603
  26 #define EXT_IRQ_IUCV            0x4000
  27
  28 #ifndef __ASSEMBLY__
  29
  30 #include <linux/hardirq.h>
  31 #include <linux/percpu.h>
  32 #include <linux/cache.h>
  33 #include <linux/types.h>
  34 #include <asm/ctlreg.h>
  35
  36 enum interruption_class {
  37         IRQEXT_CLK,
  38         IRQEXT_EXC,
  39         IRQEXT_EMS,
  40         IRQEXT_TMR,
  41         IRQEXT_TLA,
  42         IRQEXT_PFL,
  43         IRQEXT_DSD,
  44         IRQEXT_VRT,
  45         IRQEXT_SCP,
  46         IRQEXT_IUC,
  47         IRQEXT_CMS,
  48         IRQEXT_CMC,
  49         IRQEXT_FTP,
  50         IRQIO_CIO,
  51         IRQIO_DAS,
  52         IRQIO_C15,
  53         IRQIO_C70,
  54         IRQIO_TAP,
  55         IRQIO_VMR,
  56         IRQIO_LCS,
  57         IRQIO_CTC,
  58         IRQIO_ADM,
  59         IRQIO_CSC,
  60         IRQIO_VIR,
  61         IRQIO_QAI,
  62         IRQIO_APB,
  63         IRQIO_PCF,
  64         IRQIO_PCD,
  65         IRQIO_MSI,
  66         IRQIO_VAI,
  67         IRQIO_GAL,
  68         NMI_NMI,
  69         CPU_RST,
  70         NR_ARCH_IRQS
  71 };
  72
  73 struct irq_stat {
  74         unsigned int irqs[NR_ARCH_IRQS];
  75 };
  76
  77 DECLARE_PER_CPU_SHARED_ALIGNED(struct irq_stat, irq_stat);
  78
  79 static __always_inline void inc_irq_stat(enum interruption_class irq)
  80 {
  81         __this_cpu_inc(irq_stat.irqs[irq]);
  82 }
  83
  84 struct ext_code {
  85         union {
  86                 struct {
  87                         unsigned short subcode;
  88                         unsigned short code;
  89                 };
  90                 unsigned int int_code;
  91         };
  92 };
  93
  94 typedef void (*ext_int_handler_t)(struct ext_code, unsigned int, unsigned long);
  95
  96 int register_external_irq(u16 code, ext_int_handler_t handler);
  97 int unregister_external_irq(u16 code, ext_int_handler_t handler);
  98
  99 enum irq_subclass {
 100         IRQ_SUBCLASS_MEASUREMENT_ALERT = 5,
 101         IRQ_SUBCLASS_SERVICE_SIGNAL = 9,
 102 };
 103
 104 #define CR0_IRQ_SUBCLASS_MASK                                     \
 105         (CR0_WARNING_TRACK                                      | \
 106          CR0_MALFUNCTION_ALERT_SUBMASK                          | \
 107          CR0_EMERGENCY_SIGNAL_SUBMASK                           | \
 108          CR0_EXTERNAL_CALL_SUBMASK                              | \
 109          CR0_CLOCK_COMPARATOR_SUBMASK                           | \
 110          CR0_CPU_TIMER_SUBMASK                                  | \
 111          CR0_SERVICE_SIGNAL_SUBMASK                             | \
 112          CR0_INTERRUPT_KEY_SUBMASK                              | \
 113          CR0_MEASUREMENT_ALERT_SUBMASK                          | \
 114          CR0_ETR_SUBMASK                                        | \
 115          CR0_IUCV)
 116
 117 void irq_subclass_register(enum irq_subclass subclass);
 118 void irq_subclass_unregister(enum irq_subclass subclass);
 119
 120 #define irq_canonicalize(irq)  (irq)
 121
 122 #endif /* __ASSEMBLY__ */
 123
 124 #endif /* _ASM_IRQ_H */