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Diffstat (limited to 'include/asm-x86_64/desc.h')
-rw-r--r--include/asm-x86_64/desc.h53
1 files changed, 1 insertions, 52 deletions
diff --git a/include/asm-x86_64/desc.h b/include/asm-x86_64/desc.h
index eb7723a46790..913d6ac00033 100644
--- a/include/asm-x86_64/desc.h
+++ b/include/asm-x86_64/desc.h
@@ -9,64 +9,13 @@
9 9
10#include <linux/string.h> 10#include <linux/string.h>
11#include <linux/smp.h> 11#include <linux/smp.h>
12#include <asm/desc_defs.h>
12 13
13#include <asm/segment.h> 14#include <asm/segment.h>
14#include <asm/mmu.h> 15#include <asm/mmu.h>
15 16
16// 8 byte segment descriptor
17struct desc_struct {
18 u16 limit0;
19 u16 base0;
20 unsigned base1 : 8, type : 4, s : 1, dpl : 2, p : 1;
21 unsigned limit : 4, avl : 1, l : 1, d : 1, g : 1, base2 : 8;
22} __attribute__((packed));
23
24struct n_desc_struct {
25 unsigned int a,b;
26};
27
28extern struct desc_struct cpu_gdt_table[GDT_ENTRIES]; 17extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];
29 18
30enum {
31 GATE_INTERRUPT = 0xE,
32 GATE_TRAP = 0xF,
33 GATE_CALL = 0xC,
34};
35
36// 16byte gate
37struct gate_struct {
38 u16 offset_low;
39 u16 segment;
40 unsigned ist : 3, zero0 : 5, type : 5, dpl : 2, p : 1;
41 u16 offset_middle;
42 u32 offset_high;
43 u32 zero1;
44} __attribute__((packed));
45
46#define PTR_LOW(x) ((unsigned long)(x) & 0xFFFF)
47#define PTR_MIDDLE(x) (((unsigned long)(x) >> 16) & 0xFFFF)
48#define PTR_HIGH(x) ((unsigned long)(x) >> 32)
49
50enum {
51 DESC_TSS = 0x9,
52 DESC_LDT = 0x2,
53};
54
55// LDT or TSS descriptor in the GDT. 16 bytes.
56struct ldttss_desc {
57 u16 limit0;
58 u16 base0;
59 unsigned base1 : 8, type : 5, dpl : 2, p : 1;
60 unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8;
61 u32 base3;
62 u32 zero1;
63} __attribute__((packed));
64
65struct desc_ptr {
66 unsigned short size;
67 unsigned long address;
68} __attribute__((packed)) ;
69
70#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8)) 19#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8))
71#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8)) 20#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8))
72#define clear_LDT() asm volatile("lldt %w0"::"r" (0)) 21#define clear_LDT() asm volatile("lldt %w0"::"r" (0))