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Marvin
2026-09-28 17:46:45 +02:00
committed by Marvin Friedrich
parent 09926f45ee
commit 4a20a5b0af
62 changed files with 1266 additions and 554 deletions
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arch/x86_64/apic.c
+32
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@@ -54,6 +54,10 @@ void lapic_init(struct local_apic* lapic) {
asm_wrmsr(0x1B, apic_msr);
lapic->id = lapic_read_reg(lapic, APIC_REG_ID);
if (lapic->xapic_regs)
lapic->id >>= 24;
// Reset the TPR.
lapic_write_reg(lapic, APIC_REG_TPR, 0);
// Enable APIC bit in the SIVR.
@@ -84,6 +88,34 @@ void lapic_eoi(struct local_apic* lapic) {
lapic_write_reg(lapic, APIC_REG_EOI, 0);
}
void lapic_send_ipi(
struct local_apic* lapic,
uint32_t target,
uint8_t vector,
enum apic_delivery_mode delivery_mode,
enum apic_dest_mode dest_mode,
enum apic_level level,
enum apic_trigger_mode trigger_mode
) {
uint64_t icr = vector;
icr |= (uint64_t)delivery_mode << 8;
icr |= (uint64_t)dest_mode << 11;
icr |= (uint64_t)level << 14;
icr |= (uint64_t)trigger_mode << 15;
if (lapic->xapic_regs)
icr |= (uint64_t)(uint8_t)target << 56;
else
icr |= (uint64_t)target << 32;
lapic_write_reg(lapic, APIC_REG_ICR, icr);
if (lapic->xapic_regs) {
while (lapic_read_reg(lapic, APIC_REG_ICR) & (APIC_DELIVERY_STATUS_PENDING << 12))
asm volatile("pause");
}
}
constexpr uint16_t PIC1_COMMAND_PORT = 0x20;
constexpr uint16_t PIC1_DATA_PORT = 0x21;
constexpr uint16_t PIC2_COMMAND_PORT = 0xA0;