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https://github.com/RGBCube/serenity
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Kernel: Simplify interrupt management
The IRQController object is RefCounted, and is shared between the InterruptManagement class & IRQ handlers' classes. IRQHandler, SharedIRQHandler & SpuriousInterruptHandler classes use a responsible IRQ controller directly instead of calling InterruptManagement for disable(), enable() or eoi(). Also, the initialization process of InterruptManagement is simplified, so it doesn't rely on an ACPI parser to be initialized.
This commit is contained in:
Liav A
Andreas Kling
parent
f96cf250f9
commit
6f914ed0a4
9 changed files with 80 additions and 128 deletions
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@ -53,22 +53,7 @@ InterruptManagement& InterruptManagement::the()
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void InterruptManagement::initialize()
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{
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ASSERT(!InterruptManagement::initialized());
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s_interrupt_management = new InterruptManagement(true);
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}
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InterruptManagement::InterruptManagement(bool create_default_controller)
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{
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if (create_default_controller)
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m_interrupt_controllers[0] = make<PIC>();
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}
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void InterruptManagement::enable(u8 interrupt_vector)
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{
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for (auto& irq_controller : InterruptManagement::the().m_interrupt_controllers) {
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if (irq_controller->get_gsi_base() <= interrupt_vector)
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if (!irq_controller->is_hard_disabled())
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irq_controller->enable(interrupt_vector);
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}
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s_interrupt_management = new InterruptManagement();
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}
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void InterruptManagement::enumerate_interrupt_handlers(Function<void(GenericInterruptHandler&)> callback)
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@ -80,66 +65,49 @@ void InterruptManagement::enumerate_interrupt_handlers(Function<void(GenericInte
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}
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}
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void InterruptManagement::disable(u8 interrupt_vector)
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{
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for (auto& irq_controller : InterruptManagement::the().m_interrupt_controllers) {
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ASSERT(irq_controller != nullptr);
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if (irq_controller->get_gsi_base() <= interrupt_vector)
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if (!irq_controller->is_hard_disabled())
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irq_controller->disable(interrupt_vector);
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}
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}
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void InterruptManagement::eoi(u8 interrupt_vector)
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{
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if (m_interrupt_controllers.size() == 1 && m_interrupt_controllers[0]->type() == IRQControllerType::i8259) {
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m_interrupt_controllers[0]->eoi(interrupt_vector);
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return;
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}
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for (auto& irq_controller : InterruptManagement::the().m_interrupt_controllers) {
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ASSERT(irq_controller != nullptr);
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if (irq_controller->get_gsi_base() <= interrupt_vector)
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if (!irq_controller->is_hard_disabled())
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irq_controller->eoi(interrupt_vector);
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}
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}
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IRQController& InterruptManagement::get_interrupt_controller(int index)
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{
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ASSERT(index >= 0);
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ASSERT(m_interrupt_controllers[index] != nullptr);
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ASSERT(!m_interrupt_controllers[index].is_null());
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return *m_interrupt_controllers[index];
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}
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void InterruptManagement::switch_to_pic_mode()
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RefPtr<IRQController> InterruptManagement::get_responsible_irq_controller(u8 interrupt_vector)
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{
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kprintf("Interrupts: PIC mode by default\n");
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SpuriousInterruptHandler::initialize(7);
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SpuriousInterruptHandler::initialize(15);
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if (m_interrupt_controllers.size() == 1 && m_interrupt_controllers[0]->type() == IRQControllerType::i8259) {
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return m_interrupt_controllers[0];
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}
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for (auto irq_controller : m_interrupt_controllers) {
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if (irq_controller->get_gsi_base() <= interrupt_vector)
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if (!irq_controller->is_hard_disabled())
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return irq_controller;
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}
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ASSERT_NOT_REACHED();
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}
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void InterruptManagement::switch_to_ioapic_mode()
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PhysicalAddress InterruptManagement::search_for_madt()
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{
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kprintf("Interrupts: Switch to IOAPIC mode failed, Reverting to PIC mode\n");
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dbg() << "Early access to ACPI tables for interrupt setup";
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auto rsdp = ACPI::StaticParsing::search_rsdp();
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if (rsdp.is_null())
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return {};
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return ACPI::StaticParsing::search_table(rsdp, "APIC");
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}
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void AdvancedInterruptManagement::initialize(PhysicalAddress p_madt)
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InterruptManagement::InterruptManagement()
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: m_madt(search_for_madt())
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{
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ASSERT(!InterruptManagement::initialized());
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s_interrupt_management = new AdvancedInterruptManagement(p_madt);
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}
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if (m_madt.is_null()) {
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m_interrupt_controllers[0] = adopt(*new PIC());
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return;
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}
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AdvancedInterruptManagement::AdvancedInterruptManagement(PhysicalAddress p_madt)
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: InterruptManagement(false)
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, m_madt(p_madt)
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{
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// FIXME: Check what is the actual data size then map accordingly
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dbg() << "Interrupts: MADT @ P " << p_madt.as_ptr();
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locate_isa_interrupt_overrides(p_madt);
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locate_ioapics(p_madt);
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dbg() << "Interrupts: MADT @ P " << m_madt.as_ptr();
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locate_apic_data();
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}
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void AdvancedInterruptManagement::switch_to_pic_mode()
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void InterruptManagement::switch_to_pic_mode()
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{
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kprintf("Interrupts: Switch to Legacy PIC mode\n");
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SpuriousInterruptHandler::initialize(7);
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@ -155,7 +123,7 @@ void AdvancedInterruptManagement::switch_to_pic_mode()
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}
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}
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void AdvancedInterruptManagement::switch_to_ioapic_mode()
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void InterruptManagement::switch_to_ioapic_mode()
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{
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kprintf("Interrupts: Switch to IOAPIC mode\n");
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if (m_interrupt_controllers.size() == 1) {
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@ -175,52 +143,31 @@ void AdvancedInterruptManagement::switch_to_ioapic_mode()
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}
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}
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void AdvancedInterruptManagement::locate_ioapics(PhysicalAddress p_madt)
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void InterruptManagement::locate_apic_data()
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{
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auto region = MM.allocate_kernel_region(p_madt.page_base(), (PAGE_SIZE * 2), "Initializing Interrupts", Region::Access::Read);
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auto& madt = *(const ACPI_RAW::MADT*)region->vaddr().offset(p_madt.offset_in_page().get()).as_ptr();
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ASSERT(!m_madt.is_null());
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auto region = MM.allocate_kernel_region(m_madt.page_base(), (PAGE_SIZE * 2), "Initializing Interrupts", Region::Access::Read);
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auto& madt = *(const ACPI::Structures::MADT*)region->vaddr().offset(m_madt.offset_in_page().get()).as_ptr();
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int index = 0;
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int irq_controller_count = 0;
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if (madt.flags & PCAT_COMPAT_FLAG) {
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m_interrupt_controllers[0] = make<PIC>();
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index++;
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m_interrupt_controllers[0] = adopt(*new PIC());
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irq_controller_count++;
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}
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size_t entry_index = 0;
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size_t entries_length = madt.h.length - sizeof(ACPI_RAW::MADT);
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size_t entries_length = madt.h.length - sizeof(ACPI::Structures::MADT);
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auto* madt_entry = madt.entries;
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while (entries_length > 0) {
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size_t entry_length = madt_entry->length;
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if (madt_entry->type == (u8)ACPI_RAW::MADTEntryType::IOAPIC) {
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auto* ioapic_entry = (const ACPI_RAW::MADT_IOAPIC*)madt_entry;
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if (madt_entry->type == (u8)ACPI::Structures::MADTEntryType::IOAPIC) {
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auto* ioapic_entry = (const ACPI::Structures::MADTEntries::IOAPIC*)madt_entry;
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dbg() << "IOAPIC found @ MADT entry " << entry_index << ", MMIO Registers @ Px" << String::format("%x", ioapic_entry->ioapic_address);
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m_interrupt_controllers.resize(1 + index);
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m_interrupt_controllers[index] = make<IOAPIC>(*(ioapic_mmio_regs*)ioapic_entry->ioapic_address, ioapic_entry->gsi_base, m_isa_interrupt_overrides, m_pci_interrupt_overrides);
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index++;
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m_interrupt_controllers.resize(1 + irq_controller_count);
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m_interrupt_controllers[irq_controller_count] = adopt(*new IOAPIC(*(ioapic_mmio_regs*)ioapic_entry->ioapic_address, ioapic_entry->gsi_base, m_isa_interrupt_overrides, m_pci_interrupt_overrides));
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irq_controller_count++;
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}
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madt_entry = (ACPI_RAW::MADTEntryHeader*)(VirtualAddress((u32)madt_entry).offset(entry_length).get());
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entries_length -= entry_length;
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entry_index++;
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}
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}
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void AdvancedInterruptManagement::locate_pci_interrupt_overrides()
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{
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// FIXME: calling the MultiProcessorParser causes a pagefault.
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ASSERT_NOT_REACHED();
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m_pci_interrupt_overrides = MultiProcessorParser::the().get_pci_interrupt_redirections();
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}
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void AdvancedInterruptManagement::locate_isa_interrupt_overrides(PhysicalAddress p_madt)
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{
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auto region = MM.allocate_kernel_region(p_madt.page_base(), (PAGE_SIZE * 2), "Initializing Interrupts", Region::Access::Read);
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auto& madt = *(const ACPI_RAW::MADT*)region->vaddr().offset(p_madt.offset_in_page().get()).as_ptr();
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size_t entry_index = 0;
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size_t entries_length = madt.h.length - sizeof(ACPI_RAW::MADT);
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auto* madt_entry = madt.entries;
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while (entries_length > 0) {
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size_t entry_length = madt_entry->length;
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if (madt_entry->type == (u8)ACPI_RAW::MADTEntryType::InterruptSourceOverride) {
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auto* interrupt_override_entry = (const ACPI_RAW::MADT_InterruptSourceOverride*)madt_entry;
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if (madt_entry->type == (u8)ACPI::Structures::MADTEntryType::InterruptSourceOverride) {
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auto* interrupt_override_entry = (const ACPI::Structures::MADTEntries::InterruptSourceOverride*)madt_entry;
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m_isa_interrupt_overrides.append(adopt(*new ISAInterruptOverrideMetadata(
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interrupt_override_entry->bus,
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interrupt_override_entry->source,
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@ -228,11 +175,17 @@ void AdvancedInterruptManagement::locate_isa_interrupt_overrides(PhysicalAddress
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interrupt_override_entry->flags)));
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dbg() << "Interrupts: Overriding INT 0x" << String::format("%x", interrupt_override_entry->source) << " with GSI " << interrupt_override_entry->global_system_interrupt << ", for bus 0x" << String::format("%x", interrupt_override_entry->bus);
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}
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madt_entry = (ACPI_RAW::MADTEntryHeader*)(VirtualAddress((u32)madt_entry).offset(entry_length).get());
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madt_entry = (ACPI::Structures::MADTEntryHeader*)(VirtualAddress((u32)madt_entry).offset(entry_length).get());
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entries_length -= entry_length;
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entry_index++;
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}
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}
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void InterruptManagement::locate_pci_interrupt_overrides()
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{
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// FIXME: calling the MultiProcessorParser causes a pagefault.
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ASSERT_NOT_REACHED();
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m_pci_interrupt_overrides = MultiProcessorParser::the().get_pci_interrupt_redirections();
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}
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ISAInterruptOverrideMetadata::ISAInterruptOverrideMetadata(u8 bus, u8 source, u32 global_system_interrupt, u16 flags)
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: m_bus(bus)
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