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 
35 enum interruption_class {
36 	IRQEXT_CLK,
37 	IRQEXT_EXC,
38 	IRQEXT_EMS,
39 	IRQEXT_TMR,
40 	IRQEXT_TLA,
41 	IRQEXT_PFL,
42 	IRQEXT_DSD,
43 	IRQEXT_VRT,
44 	IRQEXT_SCP,
45 	IRQEXT_IUC,
46 	IRQEXT_CMS,
47 	IRQEXT_CMC,
48 	IRQEXT_FTP,
49 	IRQIO_CIO,
50 	IRQIO_DAS,
51 	IRQIO_C15,
52 	IRQIO_C70,
53 	IRQIO_TAP,
54 	IRQIO_VMR,
55 	IRQIO_LCS,
56 	IRQIO_CTC,
57 	IRQIO_ADM,
58 	IRQIO_CSC,
59 	IRQIO_VIR,
60 	IRQIO_QAI,
61 	IRQIO_APB,
62 	IRQIO_PCF,
63 	IRQIO_PCD,
64 	IRQIO_MSI,
65 	IRQIO_VAI,
66 	IRQIO_GAL,
67 	NMI_NMI,
68 	CPU_RST,
69 	NR_ARCH_IRQS
70 };
71 
72 struct irq_stat {
73 	unsigned int irqs[NR_ARCH_IRQS];
74 };
75 
76 DECLARE_PER_CPU_SHARED_ALIGNED(struct irq_stat, irq_stat);
77 
inc_irq_stat(enum interruption_class irq)78 static __always_inline void inc_irq_stat(enum interruption_class irq)
79 {
80 	__this_cpu_inc(irq_stat.irqs[irq]);
81 }
82 
83 struct ext_code {
84 	unsigned short subcode;
85 	unsigned short code;
86 };
87 
88 typedef void (*ext_int_handler_t)(struct ext_code, unsigned int, unsigned long);
89 
90 int register_external_irq(u16 code, ext_int_handler_t handler);
91 int unregister_external_irq(u16 code, ext_int_handler_t handler);
92 
93 enum irq_subclass {
94 	IRQ_SUBCLASS_MEASUREMENT_ALERT = 5,
95 	IRQ_SUBCLASS_SERVICE_SIGNAL = 9,
96 };
97 
98 #define CR0_IRQ_SUBCLASS_MASK					  \
99 	((1UL << (63 - 30))  /* Warning Track */		| \
100 	 (1UL << (63 - 48))  /* Malfunction Alert */		| \
101 	 (1UL << (63 - 49))  /* Emergency Signal */		| \
102 	 (1UL << (63 - 50))  /* External Call */		| \
103 	 (1UL << (63 - 52))  /* Clock Comparator */		| \
104 	 (1UL << (63 - 53))  /* CPU Timer */			| \
105 	 (1UL << (63 - 54))  /* Service Signal */		| \
106 	 (1UL << (63 - 57))  /* Interrupt Key */		| \
107 	 (1UL << (63 - 58))  /* Measurement Alert */		| \
108 	 (1UL << (63 - 59))  /* Timing Alert */			| \
109 	 (1UL << (63 - 62))) /* IUCV */
110 
111 void irq_subclass_register(enum irq_subclass subclass);
112 void irq_subclass_unregister(enum irq_subclass subclass);
113 
114 #define irq_canonicalize(irq)  (irq)
115 
116 #endif /* __ASSEMBLY__ */
117 
118 #endif /* _ASM_IRQ_H */
119