32 lines
681 B
Rust
32 lines
681 B
Rust
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pub const GDT_NULL: usize = 0;
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pub const GDT_KERNEL_CODE: usize = 1;
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pub const GDT_KERNEL_DATA: usize = 2;
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pub const GDT_USER_CODE: usize = 3;
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pub const GDT_USER_DATA: usize = 4;
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pub const GDT_USER_TLS: usize = 5;
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pub const GDT_TSS: usize = 6;
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#[repr(packed)]
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pub struct GdtDescriptor {
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pub size: u16,
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pub ptr: u64
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}
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#[repr(packed)]
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pub struct GdtEntry {
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pub limitl: u16,
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pub basel: u16,
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pub basem: u8,
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pub attribute: u8,
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pub flags_limith: u8,
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pub baseh: u8
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}
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impl GdtEntry {
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pub fn set_base(&mut self, base: usize) {
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self.basel = base as u16;
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self.basem = (base >> 16) as u8;
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self.baseh = (base >> 24) as u8;
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}
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}
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