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2cb86c1309
Nobody uses this functionality. I used this code on my old 2007 ICH7 test machine about a year ago, but bare metal is a small aspect of the project, so it's safe to assume that nobody really tests this piece of code. Therefore, let's drop this for good and focus on more modern hardware.
56 lines
1.9 KiB
C++
56 lines
1.9 KiB
C++
/*
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* Copyright (c) 2021-2022, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Devices/Storage/AHCI/InterruptHandler.h>
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namespace Kernel {
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UNMAP_AFTER_INIT ErrorOr<NonnullOwnPtr<AHCIInterruptHandler>> AHCIInterruptHandler::create(AHCIController& controller, u8 irq, AHCI::MaskedBitField taken_ports)
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{
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auto port_handler = TRY(adopt_nonnull_own_or_enomem(new (nothrow) AHCIInterruptHandler(controller, irq, taken_ports)));
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port_handler->allocate_resources_and_initialize_ports();
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return port_handler;
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}
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void AHCIInterruptHandler::allocate_resources_and_initialize_ports()
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{
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// Clear pending interrupts, if there are any!
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m_pending_ports_interrupts.set_all();
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enable_irq();
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}
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UNMAP_AFTER_INIT AHCIInterruptHandler::AHCIInterruptHandler(AHCIController& controller, u8 irq, AHCI::MaskedBitField taken_ports)
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: PCI::IRQHandler(controller, irq)
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, m_parent_controller(controller)
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, m_taken_ports(taken_ports)
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, m_pending_ports_interrupts(create_pending_ports_interrupts_bitfield())
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{
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dbgln_if(AHCI_DEBUG, "AHCI Port Handler: IRQ {}", irq);
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}
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AHCI::MaskedBitField AHCIInterruptHandler::create_pending_ports_interrupts_bitfield() const
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{
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return AHCI::MaskedBitField((u32 volatile&)m_parent_controller->hba().control_regs.is, m_taken_ports.bit_mask());
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}
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AHCIInterruptHandler::~AHCIInterruptHandler() = default;
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bool AHCIInterruptHandler::handle_irq(RegisterState const&)
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{
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dbgln_if(AHCI_DEBUG, "AHCI Port Handler: IRQ received");
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if (m_pending_ports_interrupts.is_zeroed())
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return false;
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for (auto port_index : m_pending_ports_interrupts.to_vector()) {
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dbgln_if(AHCI_DEBUG, "AHCI Port Handler: Handling IRQ for port {}", port_index);
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m_parent_controller->handle_interrupt_for_port({}, port_index);
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// We do this to clear the pending interrupt after we handled it.
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m_pending_ports_interrupts.set_at(port_index);
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}
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return true;
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}
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}
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