Resolve strange IRQ issues which cause the scheduler to behave weirdly (IRQ mapping)

kernel/amd64/apic.c

@@ -77,7 +77,7 @@ static void amd64_ioapic_write (struct ioapic* ioapic, uint32_t reg, uint32_t va
 }
 
 /* Find an IOAPIC corresposting to provided IRQ */
-static struct ioapic* amd64_ioapic_find (uint8_t irq) {
+static struct ioapic* amd64_ioapic_find (uint32_t irq) {
   struct ioapic* ioapic = NULL;
 
   for (size_t i = 0; i < ioapic_entries; i++) {
@@ -103,7 +103,7 @@ static struct ioapic* amd64_ioapic_find (uint8_t irq) {
  * flags - IOAPIC redirection flags.
  * lapic_id - Local APIC that will receive the interrupt.
  */
-void amd64_ioapic_route_irq (uint8_t vec, uint8_t irq, uint64_t flags, uint64_t lapic_id) {
+void amd64_ioapic_route_irq (uint32_t vec, uint32_t irq, uint64_t flags, uint64_t lapic_id) {
   struct ioapic* ioapic = NULL;
   struct acpi_madt_interrupt_source_override* override;
   bool found_override = false;
@@ -119,13 +119,13 @@ void amd64_ioapic_route_irq (uint8_t vec, uint8_t irq, uint64_t flags, uint64_t
   uint64_t calc_flags = (lapic_id << 56) | (flags) | (vec & 0xFF);
 
   if (found_override) {
-    uint8_t polarity = ((override->flags & 0x03) == 0x03) ? 1 : 0;
-    uint8_t mode = (((override->flags >> 2) & 0x03) == 0x03) ? 1 : 0;
+    uint32_t polarity = ((override->flags & 0x03) == 0x03) ? 1 : 0;
+    uint32_t mode = (((override->flags >> 2) & 0x03) == 0x03) ? 1 : 0;
     calc_flags |= (uint64_t)mode << 15;
     calc_flags |= (uint64_t)polarity << 13;
   }
 
-  uint8_t gsi = found_override ? override->gsi : irq;
+  uint32_t gsi = found_override ? override->gsi : irq;
 
   ioapic = amd64_ioapic_find (gsi);
 
@@ -263,7 +263,7 @@ void amd64_lapic_init (uint32_t us) {
  * lapic_id - Target Local APIC
  * vec - Interrupt vector/IDT stub, which will be invoked by the IPI.
  */
-void amd64_lapic_ipi (uint8_t lapic_id, uint8_t vec) {
+void amd64_lapic_ipi (uint32_t lapic_id, uint32_t vec) {
   /* wait for previous IPI to finish */
   while (amd64_lapic_read (LAPIC_ICR) & (1 << 12)) {
     __asm__ volatile ("pause");

kernel/amd64/apic.h

@@ -3,12 +3,12 @@
 
 #include <libk/std.h>
 
-void amd64_ioapic_route_irq (uint8_t vec, uint8_t irq, uint64_t flags, uint64_t lapic_id);
+void amd64_ioapic_route_irq (uint32_t vec, uint32_t irq, uint64_t flags, uint64_t lapic_id);
 void amd64_ioapic_init (void);
 
 uint32_t amd64_lapic_id (void);
 void amd64_lapic_eoi (void);
-void amd64_lapic_ipi (uint8_t lapic_id, uint8_t vec);
+void amd64_lapic_ipi (uint32_t lapic_id, uint32_t vec);
 void amd64_lapic_init (uint32_t us);
 
 #endif // _KERNEL_AMD64_APIC_H

kernel/amd64/intr.c

@@ -216,12 +216,12 @@ void irq_save (spin_lock_ctx_t* ctx) { *ctx = amd64_irq_save_flags (); }
 void irq_restore (spin_lock_ctx_t* ctx) { amd64_irq_restore_flags (*ctx); }
 
 /* Map custom IRQ mappings to legacy IRQs */
-uint8_t amd64_resolve_irq (uint8_t irq) {
-  static const uint8_t mappings[] = {
+uint32_t amd64_resolve_irq (uint32_t irq) {
+  static const uint32_t mappings[] = {
       [SCHED_PREEMPT_TIMER] = 0,
-      [TLB_SHOOTDOWN] = 1,
-      [CPU_REQUEST_SCHED] = 2,
-      [CPU_SPURIOUS] = 3,
+      [TLB_SHOOTDOWN] = 6,
+      [CPU_REQUEST_SCHED] = 3,
+      [CPU_SPURIOUS] = 5,
   };
 
   return mappings[irq];

kernel/amd64/intr.h

@@ -32,7 +32,7 @@ struct saved_regs {
 } PACKED;
 
 void amd64_load_idt (void);
-uint8_t amd64_resolve_irq (uint8_t irq);
+uint32_t amd64_resolve_irq (uint32_t irq);
 void amd64_intr_init (void);
 
 #endif // _KERNEL_AMD64_INTR_H