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
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	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
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};
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
117void irq_subclass_register(enum irq_subclass subclass);
118void irq_subclass_unregister(enum irq_subclass subclass);
119
120#define irq_canonicalize(irq)  (irq)
121
122#endif /* __ASSEMBLY__ */
123
124#endif /* _ASM_IRQ_H */
125