ps2 init complete, can receive keyboard presses

kernel/drivers/pic/pic_stubs.S

@@ -1,6 +1,8 @@
 #include "drivers/pic/pic.h"
 
 .code32
+.extern io_wait
+
 .global init_pic
 init_pic:
     # init command
@@ -17,7 +19,7 @@ init_pic:
     # cascade 
     mov $0x04, %al
     outb %al, $PIC1_DATA
-    mov $0x02, %al
+    mov $0x02, %al  
     outb %al, $PIC2_DATA 
 
     # env
@@ -25,7 +27,7 @@ init_pic:
     outb %al, $PIC1_DATA
     outb %al, $PIC2_DATA 
 
-    # mask all 
+    # mask
     mov $0xFC, %al
     outb %al, $PIC1_DATA
     mov $0xFF, %al
@@ -33,10 +35,6 @@ init_pic:
 
     ret
 
-.global io_wait
-io_wait: 
-    ret
-
 .global send_eoi_master
 send_eoi_master:
     mov $0x20, %al
@@ -49,3 +47,19 @@ send_eoi_slave:
     outb %al, $PIC2_COMMAND
     call send_eoi_master
     ret 
+
+.global read_isr_master
+read_isr_master:
+    xorl %eax, %eax
+    mov $0x0B, %al
+    outb %al, $PIC1_COMMAND
+    in $PIC1_COMMAND, %al
+    ret
+
+.global read_isr_slave 
+read_isr_slave:
+    xorl %eax, %eax
+    mov $0x0B, %al
+    outb %al, $PIC2_COMMAND
+    in $PIC2_COMMAND, %al
+    ret