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Kernel: Acquire ISA interrupt overrides from Interrupt Management

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Also, InterruptDisabler were added to prevent critical function from
being interrupted. In addition, the interrupt numbers are abstracted
from IDT offsets, thus, allowing to create a better routing scheme
when using IOAPICs for interrupt redirection.
This commit is contained in:
Liav A 2020-03-06 03:19:40 +02:00 • committed by Andreas Kling
parent d9d792d37f
commit 30fc78bfaf
5 changed files with 54 additions and 21 deletions
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32
Kernel/Interrupts/InterruptManagement.cpp
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@ -27,11 +27,14 @@
#include <AK/FixedArray.h>
#include <Kernel/ACPI/MultiProcessorParser.h>
#include <Kernel/Arch/i386/CPU.h>
#include <Kernel/Interrupts/APIC.h>
#include <Kernel/Interrupts/IOAPIC.h>
#include <Kernel/Interrupts/InterruptManagement.h>
#include <Kernel/Interrupts/PIC.h>
#include <Kernel/Interrupts/SpuriousInterruptHandler.h>
#include <Kernel/Interrupts/UnhandledInterruptHandler.h>
#include <Kernel/VM/MemoryManager.h>
#include <LibBareMetal/IO.h>
#define PCAT_COMPAT_FLAG 0x1
@ -72,6 +75,26 @@ IRQController& InterruptManagement::get_interrupt_controller(int index)
return *m_interrupt_controllers[index];
}
Vector<RefPtr<ISAInterruptOverrideMetadata>> InterruptManagement::isa_overrides()
{
return m_isa_interrupt_overrides;
}
u8 InterruptManagement::acquire_mapped_interrupt_number(u8 number)
{
if (!InterruptManagement::initialized()) {
// This is necessary, because we install UnhandledInterruptHandlers before we actually initialize the Interrupt Management object...
return number;
}
return InterruptManagement::the().get_mapped_vector_number(number);
}
u8 InterruptManagement::get_mapped_vector_number(u8 original_vector)
{
// FIXME: For SMP configuration (with IOAPICs) use a better routing scheme to make redirections more efficient.
return original_vector;
}
RefPtr<IRQController> InterruptManagement::get_responsible_irq_controller(u8 interrupt_vector)
{
if (m_interrupt_controllers.size() == 1 && m_interrupt_controllers[0]->type() == IRQControllerType::i8259) {
@ -110,6 +133,8 @@ InterruptManagement::InterruptManagement()
void InterruptManagement::switch_to_pic_mode()
{
klog() << "Interrupts: Switch to Legacy PIC mode";
InterruptDisabler disabler;
m_smp_enabled = false;
SpuriousInterruptHandler::initialize(7);
SpuriousInterruptHandler::initialize(15);
for (auto& irq_controller : m_interrupt_controllers) {
@ -126,6 +151,8 @@ void InterruptManagement::switch_to_pic_mode()
void InterruptManagement::switch_to_ioapic_mode()
{
klog() << "Interrupts: Switch to IOAPIC mode";
InterruptDisabler disabler;
m_smp_enabled = true;
if (m_interrupt_controllers.size() == 1) {
if (get_interrupt_controller(0).type() == IRQControllerType::i8259) {
klog() << "Interrupts: NO IOAPIC detected, Reverting to PIC mode.";
@ -141,6 +168,9 @@ void InterruptManagement::switch_to_ioapic_mode()
dbg() << "Interrupts: Detected " << irq_controller->model();
}
}
APIC::init();
APIC::enable_bsp();
MultiProcessorParser::initialize();
}
void InterruptManagement::locate_apic_data()
@ -163,7 +193,7 @@ void InterruptManagement::locate_apic_data()
auto* ioapic_entry = (const ACPI::Structures::MADTEntries::IOAPIC*)madt_entry;
dbg() << "IOAPIC found @ MADT entry " << entry_index << ", MMIO Registers @ Px" << String::format("%x", ioapic_entry->ioapic_address);
m_interrupt_controllers.resize(1 + irq_controller_count);
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));
m_interrupt_controllers[irq_controller_count] = adopt(*new IOAPIC(*(ioapic_mmio_regs*)ioapic_entry->ioapic_address, ioapic_entry->gsi_base));
irq_controller_count++;
}
if (madt_entry->type == (u8)ACPI::Structures::MADTEntryType::InterruptSourceOverride) {