xref: /haiku/headers/private/kernel/arch/x86/arch_int.h (revision b3fe70844e087a579563b43cf4c1b2525946ca27)
1 /*
2  * Copyright 2005-2009, Axel Dörfler, axeld@pinc-software.de.
3  * Copyright 2012, Alex Smith, alex@alex-smith.me.uk.
4  * Distributed under the terms of the MIT License.
5  */
6 #ifndef _KERNEL_ARCH_x86_INT_H
7 #define _KERNEL_ARCH_x86_INT_H
8 
9 
10 #define ARCH_INTERRUPT_BASE	0x20
11 #define NUM_IO_VECTORS		(256 - ARCH_INTERRUPT_BASE)
12 
13 
14 enum irq_source {
15 	IRQ_SOURCE_INVALID,
16 	IRQ_SOURCE_IOAPIC,
17 	IRQ_SOURCE_MSI,
18 };
19 
20 
21 static inline void
22 arch_int_enable_interrupts_inline(void)
23 {
24 	asm volatile("sti");
25 }
26 
27 
28 static inline int
29 arch_int_disable_interrupts_inline(void)
30 {
31 	size_t flags;
32 
33 	asm volatile("pushf;\n"
34 		"pop %0;\n"
35 		"cli" : "=g" (flags));
36 	return (flags & 0x200) != 0;
37 }
38 
39 
40 static inline void
41 arch_int_restore_interrupts_inline(int oldState)
42 {
43 	if (oldState)
44 		asm("sti");
45 }
46 
47 
48 static inline bool
49 arch_int_are_interrupts_enabled_inline(void)
50 {
51 	size_t flags;
52 
53 	asm volatile("pushf;\n"
54 		"pop %0;\n" : "=g" (flags));
55 	return (flags & 0x200) != 0;
56 }
57 
58 
59 // map the functions to the inline versions
60 #define arch_int_enable_interrupts()	arch_int_enable_interrupts_inline()
61 #define arch_int_disable_interrupts()	arch_int_disable_interrupts_inline()
62 #define arch_int_restore_interrupts(status)	\
63 	arch_int_restore_interrupts_inline(status)
64 #define arch_int_are_interrupts_enabled()	\
65 	arch_int_are_interrupts_enabled_inline()
66 
67 
68 #ifdef __cplusplus
69 
70 typedef struct interrupt_controller_s {
71 	const char *name;
72 	void	(*enable_io_interrupt)(int32 num);
73 	void	(*disable_io_interrupt)(int32 num);
74 	void	(*configure_io_interrupt)(int32 num, uint32 config);
75 	bool	(*is_spurious_interrupt)(int32 num);
76 	bool	(*is_level_triggered_interrupt)(int32 num);
77 	bool	(*end_of_interrupt)(int32 num);
78 	void	(*assign_interrupt_to_cpu)(int32 num, int32 cpu);
79 } interrupt_controller;
80 
81 
82 void x86_set_irq_source(int irq, irq_source source);
83 
84 void arch_int_set_interrupt_controller(const interrupt_controller &controller);
85 
86 #endif // __cplusplus
87 
88 #endif /* _KERNEL_ARCH_x86_INT_H */
89