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MdeModulePkg/DxeNetLib: Check the actual packet size before trim data from Nbuf.
[mirror_edk2.git] / UefiCpuPkg / CpuDxe / CpuGdt.h
1 /** @file
2 C based implemention of IA32 interrupt handling only
3 requiring a minimal assembly interrupt entry point.
4
5 Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
6 This program and the accompanying materials
7 are licensed and made available under the terms and conditions of the BSD License
8 which accompanies this distribution. The full text of the license may be found at
9 http://opensource.org/licenses/bsd-license.php
10
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13
14 **/
15
16 #ifndef _CPU_GDT_H_
17 #define _CPU_GDT_H_
18
19 //
20 // Local structure definitions
21 //
22
23 #pragma pack (1)
24
25 //
26 // Global Descriptor Entry structures
27 //
28
29 typedef struct _GDT_ENTRY {
30 UINT16 Limit15_0;
31 UINT16 Base15_0;
32 UINT8 Base23_16;
33 UINT8 Type;
34 UINT8 Limit19_16_and_flags;
35 UINT8 Base31_24;
36 } GDT_ENTRY;
37
38 typedef
39 struct _GDT_ENTRIES {
40 GDT_ENTRY Null;
41 GDT_ENTRY Linear;
42 GDT_ENTRY LinearCode;
43 GDT_ENTRY SysData;
44 GDT_ENTRY SysCode;
45 GDT_ENTRY Spare4;
46 GDT_ENTRY LinearData64;
47 GDT_ENTRY LinearCode64;
48 GDT_ENTRY Spare5;
49 } GDT_ENTRIES;
50
51 #pragma pack ()
52
53 #define NULL_SEL OFFSET_OF (GDT_ENTRIES, Null)
54 #define LINEAR_SEL OFFSET_OF (GDT_ENTRIES, Linear)
55 #define LINEAR_CODE_SEL OFFSET_OF (GDT_ENTRIES, LinearCode)
56 #define SYS_DATA_SEL OFFSET_OF (GDT_ENTRIES, SysData)
57 #define SYS_CODE_SEL OFFSET_OF (GDT_ENTRIES, SysCode)
58 #define SPARE4_SEL OFFSET_OF (GDT_ENTRIES, Spare4)
59 #define LINEAR_DATA64_SEL OFFSET_OF (GDT_ENTRIES, LinearData64)
60 #define LINEAR_CODE64_SEL OFFSET_OF (GDT_ENTRIES, LinearCode64)
61 #define SPARE5_SEL OFFSET_OF (GDT_ENTRIES, Spare5)
62
63 #if defined (MDE_CPU_IA32)
64 #define CPU_CODE_SEL LINEAR_CODE_SEL
65 #define CPU_DATA_SEL LINEAR_SEL
66 #elif defined (MDE_CPU_X64)
67 #define CPU_CODE_SEL LINEAR_CODE64_SEL
68 #define CPU_DATA_SEL LINEAR_DATA64_SEL
69 #else
70 #error CPU type not supported for CPU GDT initialization!
71 #endif
72
73 #endif // _CPU_GDT_H_
74