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Kernel: I have no idea what this commit does

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I had committed a change in IDT but reverted it now.

This propably only adds a spurious interrupt detection to common cpp
interrupt handler?
This commit is contained in:
Bananymous
2023-01-25 22:15:32 +02:00
parent 9c31790359
commit e87026f01d
4 changed files with 36 additions and 11 deletions
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20
kernel/arch/i386/IDT.cpp
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@@ -74,7 +74,7 @@ namespace IDT
static IDTR s_idtr;
static GateDescriptor* s_idt = nullptr;
static void (**s_irq_handlers)();
static void(**s_irq_handlers)();
INTERRUPT_HANDLER____(0x00, "Division Error")
INTERRUPT_HANDLER____(0x01, "Debug")
@@ -137,7 +137,19 @@ namespace IDT
if (s_irq_handlers[irq])
s_irq_handlers[irq]();
else
Kernel::Panic("no handler for irq 0x{2H}\n", irq);
{
uint32_t isr_byte = irq / 32;
uint32_t isr_bit = irq % 32;
uint32_t isr[8];
InterruptController::Get().GetISR(isr);
if (!(isr[isr_byte] & (1 << isr_bit)))
{
dprintln("spurious irq 0x{2H}", irq);
return;
}
dprintln("no handler for irq 0x{2H}\n", irq);
}
InterruptController::Get().EOI(irq);
}
@@ -165,7 +177,7 @@ namespace IDT
asm volatile("lidt %0"::"m"(s_idtr));
}
static void register_interrupt_handler(uint8_t index, void (*f)())
static void register_interrupt_handler(uint8_t index, void(*f)())
{
GateDescriptor& descriptor = s_idt[index];
descriptor.offset1 = (uint32_t)f & 0xFFFF;
@@ -176,7 +188,7 @@ namespace IDT
descriptor.offset2 = (uint32_t)f >> 16;
}
void register_irq_handler(uint8_t irq, void (*f)())
void register_irq_handler(uint8_t irq, void(*f)())
{
s_irq_handlers[IRQ_VECTOR_BASE + irq] = f;
register_interrupt_handler(IRQ_VECTOR_BASE + irq, handle_irq_common);