80 lines
1.8 KiB
Rust
80 lines
1.8 KiB
Rust
use x86::structures::idt::*;
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use x86::devices::pic;
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use time;
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#[macro_export]
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macro_rules! interrupt {
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($i:expr, $name:ident, $func:block) => {
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pub extern "x86-interrupt" fn $name(stack_frame: &mut ExceptionStackFrame)
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{
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unsafe { trigger($i); }
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#[allow(unused_variables)]
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fn inner(stack: &mut ExceptionStackFrame) {
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$func
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}
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inner(stack_frame);
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unsafe { acknowledge($i); }
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}
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}
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}
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pub unsafe fn trigger(irq: u8) {
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if irq < 16 {
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if irq >= 8 {
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pic::SLAVE.mask_set(irq - 8);
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pic::MASTER.ack();
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pic::SLAVE.ack();
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} else {
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pic::MASTER.mask_set(irq);
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pic::MASTER.ack();
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}
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}
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}
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pub unsafe fn acknowledge(irq: usize) {
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if irq < 16 {
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if irq >= 8 {
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pic::SLAVE.mask_clear(irq as u8 - 8);
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pic::SLAVE.ack();
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} else {
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pic::MASTER.mask_clear(irq as u8);
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pic::MASTER.ack();
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}
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}
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}
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interrupt!(0, pit, {
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/// t = 1/f
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/// pit freq = 1.193182 MHz
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/// chan0 divisor = 2685
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/// PIT_RATE in us
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const PIT_RATE: u32 = 2_251;
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{
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let mut offset = time::OFFSET.lock();
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let sum = offset.1 + PIT_RATE;
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offset.1 = sum % 1_000_000;
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offset.0 += sum / 1_000_000;
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}
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unsafe { pic::MASTER.ack() };
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});
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interrupt!(1, keyboard, {
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::keyboard::kbd_callback();
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});
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interrupt!(2, cascade, {});
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interrupt!(3, com2, {});
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interrupt!(4, com1, {});
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interrupt!(5, lpt2, {});
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interrupt!(6, floppy, {});
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interrupt!(7, lpt1, {});
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interrupt!(8, rtc, {});
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interrupt!(9, pci1, {});
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interrupt!(10, pci2, {});
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interrupt!(11, pci3, {});
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interrupt!(12, mouse, {});
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interrupt!(13, fpu, {});
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interrupt!(14, ata1, {});
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interrupt!(15, ata2, {});
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