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88c5992e0b
Even if the PIC was disabled it can still generate noise (spurious IRQs) so we need to register two handlers for handling such cases. Also, we declare interrupt service routine offset 0x20 to 0x2f as reserved, so when the PIC is disabled, we can handle spurious IRQs from the PIC at separate handlers.
52 lines
1.9 KiB
C++
52 lines
1.9 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Leon Albrecht <leon2002.la@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Types.h>
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#include <Kernel/Interrupts/GenericInterruptHandler.h>
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#include <AK/Platform.h>
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VALIDATE_IS_X86()
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namespace Kernel {
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class GenericInterruptHandler;
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extern "C" void interrupt_common_asm_entry();
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#if ARCH(I386)
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# define INTERRUPT_HANDLER_PUSH_PADDING
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#else
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# define INTERRUPT_HANDLER_PUSH_PADDING "pushw $0\npushw $0\n"
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#endif
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// clang-format off
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#define GENERATE_GENERIC_INTERRUPT_HANDLER_ASM_ENTRY(isr_number) \
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extern "C" void interrupt_##isr_number##_asm_entry(); \
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static void interrupt_##isr_number##_asm_entry_dummy() __attribute__((used)); \
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NEVER_INLINE void interrupt_##isr_number##_asm_entry_dummy() \
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{ \
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asm(".globl interrupt_" #isr_number "_asm_entry\n" \
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"interrupt_" #isr_number "_asm_entry:\n" \
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INTERRUPT_HANDLER_PUSH_PADDING \
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" pushw $" #isr_number "\n" \
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" pushw $0\n" \
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" jmp interrupt_common_asm_entry\n"); \
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}
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// clang-format on
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void register_interrupt_handler(u8 number, void (*handler)());
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void register_user_callable_interrupt_handler(u8 number, void (*handler)());
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GenericInterruptHandler& get_interrupt_handler(u8 interrupt_number);
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void register_generic_interrupt_handler(u8 number, GenericInterruptHandler&);
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void register_disabled_interrupt_handler(u8 number, GenericInterruptHandler& handler);
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void unregister_generic_interrupt_handler(u8 number, GenericInterruptHandler&);
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void idt_init();
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}
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