refactor: one more step towards arch-agnostic design

[lunaix-os.git] / lunaix-os / arch / i386 / hal / pic.h

diff --git a/lunaix-os/arch/i386/hal/pic.h b/lunaix-os/arch/i386/hal/pic.h
new file mode 100644 (file)
index 0000000..b13aae5
--- /dev/null
+++ b/lunaix-os/arch/i386/hal/pic.h
@@ -0,0 +1,14 @@
+#ifndef __LUNAIX_PIC_H
+#define __LUNAIX_PIC_H
+// FUTURE: Full PIC implementation for fall back when no APIC is detected.
+
+static inline void
+pic_disable()
+{
+    // ref: https://wiki.osdev.org/8259_PIC
+    asm volatile("movb $0xff, %al\n"
+                 "outb %al, $0xa1\n"
+                 "outb %al, $0x21\n");
+}
+
+#endif /* __LUNAIX_PIC_H */