1 #ifndef __SEGMENT_DESCRIPTOR_H
2 #define __SEGMENT_DESCRIPTOR_H
3
4 struct segment_descriptor {
5 u16 limit_low;
6 u16 base_low;
7 u8 base_mid;
8 u8 type : 4;
9 u8 system : 1;
10 u8 dpl : 2;
11 u8 present : 1;
12 u8 limit_high : 4;
13 u8 avl : 1;
14 u8 long_mode : 1;
15 u8 default_op : 1;
16 u8 granularity : 1;
17 u8 base_high;
18 } __attribute__((packed));
19
20 #ifdef CONFIG_X86_64
21 /* LDT or TSS descriptor in the GDT. 16 bytes. */
22 struct segment_descriptor_64 {
23 struct segment_descriptor s;
24 u32 base_higher;
25 u32 pad_zero;
26 };
27
28 #endif
29 #endif
30
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