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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 __ASSEMBLER__
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
36enum 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 IRQEXT_WTI,
51 IRQIO_CIO,
52 IRQIO_DAS,
53 IRQIO_C15,
54 IRQIO_C70,
55 IRQIO_TAP,
56 IRQIO_VMR,
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
73struct irq_stat {
74 unsigned int irqs[NR_ARCH_IRQS];
75};
76
77DECLARE_PER_CPU_SHARED_ALIGNED(struct irq_stat, irq_stat);
78
79static __always_inline void inc_irq_stat(enum interruption_class irq)
80{
81 __this_cpu_inc(irq_stat.irqs[irq]);
82}
83
84struct ext_code {
85 union {
86 struct {
87 unsigned short subcode;
88 unsigned short code;
89 };
90 unsigned int int_code;
91 };
92};
93
94typedef void (*ext_int_handler_t)(struct ext_code, unsigned int, unsigned long);
95
96int register_external_irq(u16 code, ext_int_handler_t handler);
97int unregister_external_irq(u16 code, ext_int_handler_t handler);
98
99enum irq_subclass {
100 IRQ_SUBCLASS_MEASUREMENT_ALERT = 5,
101 IRQ_SUBCLASS_SERVICE_SIGNAL = 9,
102 IRQ_SUBCLASS_WARNING_TRACK = 33,
103};
104
105#define CR0_IRQ_SUBCLASS_MASK \
106 (CR0_WARNING_TRACK | \
107 CR0_MALFUNCTION_ALERT_SUBMASK | \
108 CR0_EMERGENCY_SIGNAL_SUBMASK | \
109 CR0_EXTERNAL_CALL_SUBMASK | \
110 CR0_CLOCK_COMPARATOR_SUBMASK | \
111 CR0_CPU_TIMER_SUBMASK | \
112 CR0_SERVICE_SIGNAL_SUBMASK | \
113 CR0_INTERRUPT_KEY_SUBMASK | \
114 CR0_MEASUREMENT_ALERT_SUBMASK | \
115 CR0_ETR_SUBMASK | \
116 CR0_IUCV)
117
118void irq_subclass_register(enum irq_subclass subclass);
119void irq_subclass_unregister(enum irq_subclass subclass);
120
121#define irq_canonicalize(irq) (irq)
122
123#endif /* __ASSEMBLER__ */
124
125#endif /* _ASM_IRQ_H */
126

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source code of linux/arch/s390/include/asm/irq.h