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This commit is contained in:
Marvin
2026-08-11 17:48:20 +02:00
committed by Marvin Friedrich
parent cf33867e68
commit 0e2d4ed8c6
55 changed files with 279 additions and 346 deletions
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kernel/arch/x86_64/apic.c
+12 -12
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@@ -45,7 +45,7 @@ void lapic_init(struct local_apic* lapic) {
apic_msr |= 1 << 10;
else {
lapic->xapic_regs = mmio_new(apic_msr & 0xFFFF'F000, 0x1000);
ASSERT(lapic->xapic_regs, "Failed to allocate virtual memory!\n");
assert(lapic->xapic_regs, "Failed to allocate virtual memory!\n");
}
asm_wrmsr(0x1B, apic_msr);
@@ -86,18 +86,18 @@ void lapic_eoi(struct local_apic* lapic) {
#define PIC2_DATA_PORT 0xA1
void pic_disable() {
// Note: We initialize the PIC properly, but completely disable it and use the APIC in favor of it.
// We initialize the PIC properly, but completely disable it and use the APIC in favor of it.
// Remap IRQs so they start at 0x20 since interrupts 0x00..0x1F are used by CPU exceptions.
asm_outb(PIC1_COMMAND_PORT, 0x11); // ICW1: Begin initialization and set cascade mode.
asm_outb(PIC1_DATA_PORT, 0x20); // ICW2: Set where interrupts should be mapped to (0x20-0x27).
asm_outb(PIC1_DATA_PORT, 0x04); // ICW3: Connect IRQ2 (0x04) to the slave PIC.
asm_outb(PIC1_DATA_PORT, 0x01); // ICW4: Set the PIC to operate in 8086/88 mode.
asm_outb(PIC1_DATA_PORT, 0xFF); // Mask all interrupts.
asm_outb(PIC1_COMMAND_PORT, 0x11);
asm_outb(PIC1_DATA_PORT, 0x20);
asm_outb(PIC1_DATA_PORT, 0x04);
asm_outb(PIC1_DATA_PORT, 0x01);
asm_outb(PIC1_DATA_PORT, 0xFF);
// Same for the slave PIC.
asm_outb(PIC2_COMMAND_PORT, 0x11); // ICW1: Begin initialization.
asm_outb(PIC2_DATA_PORT, 0x28); // ICW2: Set where interrupts should be mapped to (0x28-0x2F).
asm_outb(PIC2_DATA_PORT, 0x02); // ICW3: Connect to master PIC at IRQ2.
asm_outb(PIC2_DATA_PORT, 0x01); // ICW4: Set the PIC to operate in 8086/88 mode.
asm_outb(PIC2_DATA_PORT, 0xFF); // Mask all interrupts.
asm_outb(PIC2_COMMAND_PORT, 0x11);
asm_outb(PIC2_DATA_PORT, 0x28);
asm_outb(PIC2_DATA_PORT, 0x02);
asm_outb(PIC2_DATA_PORT, 0x01);
asm_outb(PIC2_DATA_PORT, 0xFF);
}