feat(pic): add pic functions to idt

k/idt.c

@@ -4,6 +4,7 @@
 static struct idt idt = { 0 };
 
 static struct idt_entry_info infos[] = {
+    // Intel-defined (0-20)
     {int_de, INTERRUPT_TYPE},   {int_db, INTERRUPT_TYPE},
     {int_nmi, INTERRUPT_TYPE},  {int_bp, TRAP_TYPE},
     {int_of, TRAP_TYPE},        {int_br, INTERRUPT_TYPE},
@@ -14,7 +15,14 @@ static struct idt_entry_info infos[] = {
     {int_pf, INTERRUPT_TYPE},   {0, INTERRUPT_TYPE},
     {int_mf, INTERRUPT_TYPE},   {int_ac, INTERRUPT_TYPE},
     {int_mc, INTERRUPT_TYPE},   {int_xm, INTERRUPT_TYPE},
-    {int_ve, INTERRUPT_TYPE}
+    {int_ve, INTERRUPT_TYPE},
+
+    // Intel-reserved (21-31)
+    {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},
+    {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},
+
+    // user-defined (32-255)
+    {0, INTERRUPT_TYPE},    {pic_keyboard, INTERRUPT_TYPE}
 };
 
 void handle_interrupt(struct int_args *args)

k/idt.h

@@ -5,9 +5,12 @@
 #include "gdt.h"
 #include "isr.h"
 
-#define IDT_NB_ENTRIES 21
+#define IDT_NB_ENTRIES 34
 #define IDT_SIZE (IDT_NB_ENTRIES * sizeof(struct idt_entry))
 
+#define INTEL_DEFINED 21
+#define INTEL_UNUSED  31
+
 #define INTERRUPT_TYPE 0x6
 #define TRAP_TYPE      0x7