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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <Kernel/Arch/i386/CPU.h>
#include <Kernel/Assertions.h>
#include <Kernel/Debug.h>
#include <Kernel/Interrupts/IRQHandler.h>
#include <Kernel/Interrupts/InterruptManagement.h>
#include <Kernel/Interrupts/PIC.h>
#include <Kernel/Interrupts/SharedIRQHandler.h>
namespace Kernel {
UNMAP_AFTER_INIT void SharedIRQHandler::initialize(u8 interrupt_number)
{
auto* handler = new SharedIRQHandler(interrupt_number);
handler->register_interrupt_handler();
handler->disable_interrupt_vector();
}
void SharedIRQHandler::register_handler(GenericInterruptHandler& handler)
{
dbgln_if(INTERRUPT_DEBUG, "Interrupt Handler registered @ Shared Interrupt Handler {}", interrupt_number());
m_handlers.set(&handler);
enable_interrupt_vector();
}
void SharedIRQHandler::unregister_handler(GenericInterruptHandler& handler)
{
dbgln_if(INTERRUPT_DEBUG, "Interrupt Handler unregistered @ Shared Interrupt Handler {}", interrupt_number());
m_handlers.remove(&handler);
if (m_handlers.is_empty())
disable_interrupt_vector();
}
bool SharedIRQHandler::eoi()
{
dbgln_if(INTERRUPT_DEBUG, "EOI IRQ {}", interrupt_number());
m_responsible_irq_controller->eoi(*this);
return true;
}
SharedIRQHandler::SharedIRQHandler(u8 irq)
: GenericInterruptHandler(irq)
, m_responsible_irq_controller(InterruptManagement::the().get_responsible_irq_controller(irq))
{
dbgln_if(INTERRUPT_DEBUG, "Shared Interrupt Handler registered @ {}", interrupt_number());
}
SharedIRQHandler::~SharedIRQHandler()
{
dbgln_if(INTERRUPT_DEBUG, "Shared Interrupt Handler unregistered @ {}", interrupt_number());
disable_interrupt_vector();
}
void SharedIRQHandler::handle_interrupt(const RegisterState& regs)
{
VERIFY_INTERRUPTS_DISABLED();
if constexpr (INTERRUPT_DEBUG) {
dbgln("Interrupt @ {}", interrupt_number());
dbgln("Interrupt Handlers registered - {}", m_handlers.size());
}
int i = 0;
for (auto* handler : m_handlers) {
dbgln_if(INTERRUPT_DEBUG, "Going for Interrupt Handling @ {}, Shared Interrupt {}", i, interrupt_number());
VERIFY(handler != nullptr);
handler->increment_invoking_counter();
handler->handle_interrupt(regs);
dbgln_if(INTERRUPT_DEBUG, "Going for Interrupt Handling @ {}, Shared Interrupt {} - End", i, interrupt_number());
i++;
}
}
void SharedIRQHandler::enable_interrupt_vector()
{
if (m_enabled)
return;
m_enabled = true;
m_responsible_irq_controller->enable(*this);
}
void SharedIRQHandler::disable_interrupt_vector()
{
if (!m_enabled)
return;
m_enabled = false;
m_responsible_irq_controller->disable(*this);
}
}
|
