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Kernel: Acquire ISA interrupt overrides from Interrupt Management

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

View file

@ -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) {