1/*
2 * Copyright 2005-2009, Axel D��rfler, 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
14static inline void
15arch_int_enable_interrupts_inline(void)
16{
17	asm volatile("sti");
18}
19
20
21static inline int
22arch_int_disable_interrupts_inline(void)
23{
24	size_t flags;
25
26	asm volatile("pushf;\n"
27		"pop %0;\n"
28		"cli" : "=g" (flags));
29	return (flags & 0x200) != 0;
30}
31
32
33static inline void
34arch_int_restore_interrupts_inline(int oldState)
35{
36	if (oldState)
37		asm("sti");
38}
39
40
41static inline bool
42arch_int_are_interrupts_enabled_inline(void)
43{
44	size_t flags;
45
46	asm volatile("pushf;\n"
47		"pop %0;\n" : "=g" (flags));
48	return (flags & 0x200) != 0;
49}
50
51
52// map the functions to the inline versions
53#define arch_int_enable_interrupts()	arch_int_enable_interrupts_inline()
54#define arch_int_disable_interrupts()	arch_int_disable_interrupts_inline()
55#define arch_int_restore_interrupts(status)	\
56	arch_int_restore_interrupts_inline(status)
57#define arch_int_are_interrupts_enabled()	\
58	arch_int_are_interrupts_enabled_inline()
59
60
61#ifdef __cplusplus
62
63typedef struct interrupt_controller_s {
64	const char *name;
65	void	(*enable_io_interrupt)(int32 num);
66	void	(*disable_io_interrupt)(int32 num);
67	void	(*configure_io_interrupt)(int32 num, uint32 config);
68	bool	(*is_spurious_interrupt)(int32 num);
69	bool	(*is_level_triggered_interrupt)(int32 num);
70	bool	(*end_of_interrupt)(int32 num);
71} interrupt_controller;
72
73
74void arch_int_set_interrupt_controller(const interrupt_controller &controller);
75
76#endif // __cplusplus
77
78#endif /* _KERNEL_ARCH_x86_INT_H */
79