beginning to things out into cpu-dependent and cpu-independent code

1 files changed, 24 insertions, 0 deletions

diff --git a/kc/core/cpu/irq.c b/kc/core/cpu/irq.c
new file mode 100644
index 0000000..639aca3
--- /dev/null
+++ b/kc/core/cpu/irq.c
@@ -0,0 +1,24 @@
+#include "irq.h"
+
+#include <stdatomic.h>
+
+static atomic_uint_fast64_t irq_lock_count = 0;
+
+void irq_lock(void)
+{
+    __asm__ volatile ("cli;");
+}
+
+void irq_unlock(void)
+{
+    if (irq_lock_count >= 1)
+    {
+        irq_lock_count--;
+    }
+
+    if (irq_lock_count == 0)
+    {
+        __asm__ volatile ("sti;");
+    }
+}
+