pic: initialize with rust code

1 files changed, 16 insertions, 1 deletions

diff --git a/src/arch/x86_64/interrupt/pic_8259.rs b/src/arch/x86_64/interrupt/pic_8259.rs
index 894697c..969e8d1 100644
--- a/src/arch/x86_64/interrupt/pic_8259.rs
+++ b/src/arch/x86_64/interrupt/pic_8259.rs
@@ -1,7 +1,7 @@
 // For now, the PIC is stateless, i.e. we don'e need a struct for it.
 // Perhaps I need a Mutex handle later...
 use crate::arch::x86_64::io_port::*;
-
+use crate::arch::x86_64::misc::*;
 const IMR1: u16 = 0x21;
 const IMR2: u16 = 0xa1;
 const CTRL1: u16 = 0x20;
@@ -13,6 +13,21 @@ impl PicDeviceInt {
 	pub const KEYBOARD: u8 = 1;
 }
 
+// init must be called before interrupt is enabled.
+// TODO: turn pic into a singleton struct
+pub fn init() {
+	outb(0x20, 0x11);
+	outb(0xa0, 0x11);
+	outb(0x21, 0x20);
+	outb(0xa1, 0x28);
+	outb(0x21, 0x04);
+	outb(0xa1, 0x02);
+	outb(0x21, 0x03);
+	outb(0xa1, 0x03);
+	outb(0xa1, 0xff);
+	outb(0x21, 0xfb);
+}
+
 // 8-bit registers IMR1 and IMR2 registers hold interrupt masking bit 0~7 and
 // 8~15; if an interrupt is masked(set 1) on the respective bit, it's disabled
 pub fn allow(interrupt: u8) {