Refactoring

1 files changed, 28 insertions, 0 deletions

diff --git a/src/drivers/pic.c b/src/drivers/pic.c
new file mode 100644
index 0000000..d509e1d
--- /dev/null
+++ b/src/drivers/pic.c
@@ -0,0 +1,28 @@
+#include "pic.h"
+#include "core/asm.h"
+#include "core/mem.h"
+#include "core/syscall.h"
+
+void pic_init(){
+    
+    // ICW1: Initialisation
+    outbj(0x20,0x11); // Master
+    outbj(0xA0,0x11); // Slave
+
+    // ICW2: Map IRQ index to entry into the IDT
+    outbj(0x21,0x20); // Start interrupt at offset 0x20 in IDT (index 32)
+    outbj(0xA1,0x70); // Start interrupt at offset 0x50 in IDT (index 80)
+
+    // ICW3: Indicate the connection between master and slave
+    outbj(0x21,0x02); // Slave connected to pin 2
+    outbj(0xA1,0x01); // Indicate pin id to the slave (2-1)
+
+    // ICW4: Operating mode
+    outbj(0x21,0x01); // Default operating mode
+    outbj(0xA1,0x01); // Default operating mode
+
+    // OCW: Masking
+    outbj(0x21,0b11111100);
+}
+
+