54 lines
1.1 KiB
Rust
54 lines
1.1 KiB
Rust
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use core::mem;
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pub static mut IDTR: IdtDescriptor = IdtDescriptor {
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size: 0,
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offset: 0
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};
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pub static mut IDT: [IdtEntry; 256] = [IdtEntry::new(); 256];
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#[repr(packed)]
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pub struct IdtDescriptor {
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pub size: u16,
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pub offset: u64
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}
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impl IdtDescriptor {
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pub fn set_slice(&mut self, slice: &'static [IdtEntry]) {
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self.size = (slice.len() * mem::size_of::<IdtEntry>() - 1) as u16;
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self.offset = slice.as_ptr() as u64;
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}
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}
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#[derive(Copy, Clone, Debug)]
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#[repr(packed)]
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pub struct IdtEntry {
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pub offsetl: u16,
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pub selector: u16,
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pub zero: u8,
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pub attribute: u8,
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pub offsetm: u16,
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pub offseth: u32,
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pub zero2: u32
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}
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impl IdtEntry {
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pub const fn new() -> IdtEntry {
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IdtEntry {
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offsetl: 0,
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selector: 0,
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zero: 0,
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attribute: 0,
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offsetm: 0,
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offseth: 0,
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zero2: 0
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}
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}
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pub fn set_offset(&mut self, base: usize) {
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self.offsetl = base as u16;
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self.offsetm = (base >> 16) as u16;
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self.offseth = (base >> 32) as u32;
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}
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}
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