Handle ps2 keyboard via special process

kernel/spinlock/spinlock.c

@@ -1,24 +1,36 @@
 #include <stdatomic.h>
 #include <stdint.h>
+#include <stdbool.h>
 #include "spinlock.h"
 #include "hal/hal.h"
+#include "kprintf.h"
 
 void spinlock_init(SpinLock *sl) {
   atomic_store(&sl->lock, false);
+  sl->flags = 0;
+}
+
+uint64_t spinlock_irqsave(void) {
+  uint64_t flags;
+  asm volatile("pushfq; cli; popq %0" : "=r"(flags));
+  return flags;
+}
+
+void spinlock_irqrestore(uint64_t flags) {
+  asm volatile("pushq %0; popfq" :: "r"(flags));
 }
 
 void spinlock_acquire(SpinLock *sl) {
-  bool unlocked = false;
-  while (!atomic_compare_exchange_weak(&sl->lock, &unlocked, true)) {
-    unlocked = false;
+  sl->flags = spinlock_irqsave();
+
+  while (atomic_test_and_set_explicit(&sl->lock, memory_order_acquire)) {
     SPINLOCK_HINT();
   }
 }
 
 void spinlock_release(SpinLock *sl) {
-  bool locked = true;
-  if (atomic_compare_exchange_strong(&sl->lock, &locked, false)) {
-    atomic_store(&sl->lock, false);
-  }
+  atomic_clear_flag_explicit(&sl->lock, memory_order_release);
+
+  spinlock_irqrestore(sl->flags);
 }