blob: 109c378feef7717785deb0b4dda5622ec8b04936 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/IntrusiveList.h>
#include <AK/Types.h>
#include <Kernel/Arch/RegisterState.h>
namespace Kernel {
enum class HandlerType : u8 {
IRQHandler = 1,
SharedIRQHandler = 2,
UnhandledInterruptHandler = 3,
SpuriousInterruptHandler = 4
};
class GenericInterruptHandler {
public:
static GenericInterruptHandler& from(u8 interrupt_number);
virtual ~GenericInterruptHandler()
{
VERIFY(!m_registered);
}
// Note: this method returns boolean value, to indicate if the handler handled
// the interrupt or not. This is useful for shared handlers mostly.
virtual bool handle_interrupt(const RegisterState& regs) = 0;
void will_be_destroyed();
bool is_registered() const { return m_registered; }
void register_interrupt_handler();
void unregister_interrupt_handler();
u8 interrupt_number() const { return m_interrupt_number; }
size_t get_invoking_count() const { return m_invoking_count; }
virtual size_t sharing_devices_count() const = 0;
virtual bool is_shared_handler() const = 0;
virtual bool is_sharing_with_others() const = 0;
virtual HandlerType type() const = 0;
virtual StringView purpose() const = 0;
virtual StringView controller() const = 0;
virtual bool eoi() = 0;
ALWAYS_INLINE void increment_invoking_counter()
{
m_invoking_count++;
}
protected:
void change_interrupt_number(u8 number);
GenericInterruptHandler(u8 interrupt_number, bool disable_remap = false);
void disable_remap() { m_disable_remap = true; }
private:
Atomic<u32, AK::MemoryOrder::memory_order_relaxed> m_invoking_count { 0 };
u8 m_interrupt_number { 0 };
bool m_disable_remap { false };
bool m_registered { false };
IntrusiveListNode<GenericInterruptHandler> m_list_node;
public:
using List = IntrusiveList<&GenericInterruptHandler::m_list_node>;
};
}
|
