diff options
Diffstat (limited to 'src/arch/x86_64/interrupt/pic_8259.rs')
| -rw-r--r-- | src/arch/x86_64/interrupt/pic_8259.rs | 17 |
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) { |