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Kernel: Implement helpers to manipulate MSI(x) data structures
MSIx table entry is used to program interrupt vectors and it is architecture specific. Add helper functions declaration in Arch/PCIMSI.h. The definition of the function is placed in the respective arch specific code.
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Kernel/Arch/PCIMSI.h
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42
Kernel/Arch/PCIMSI.h
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/*
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* Copyright (c) 2023, Pankaj R <dev@pankajraghav.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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namespace Kernel {
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#if ARCH(X86_64)
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u64 msi_address_register(u8 destination_id, bool redirection_hint, bool destination_mode);
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u32 msi_data_register(u8 vector, bool level_trigger, bool assert);
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u32 msix_vector_control_register(u32 vector_control, bool mask);
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void msi_signal_eoi();
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#elif ARCH(AARCH64)
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[[maybe_unused]] static u64 msi_address_register([[maybe_unused]] u8 destination_id, [[maybe_unused]] bool redirection_hint, [[maybe_unused]] bool destination_mode)
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{
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TODO_AARCH64();
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return 0;
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}
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[[maybe_unused]] static u32 msi_data_register([[maybe_unused]] u8 vector, [[maybe_unused]] bool level_trigger, [[maybe_unused]] bool assert)
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{
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TODO_AARCH64();
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return 0;
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}
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[[maybe_unused]] static u32 msix_vector_control_register([[maybe_unused]] u32 vector_control, [[maybe_unused]] bool mask)
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{
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TODO_AARCH64();
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return 0;
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}
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[[maybe_unused]] static void msi_signal_eoi()
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{
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TODO_AARCH64();
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return;
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}
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#endif
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}
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