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a1e8986d | 1 | /** @file\r |
f60f4cfe | 2 | C based implementation of IA32 interrupt handling only\r |
a1e8986d JJ |
3 | requiring a minimal assembly interrupt entry point.\r |
4 | \r | |
0d4c1db8 | 5 | Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>\r |
0acd8697 | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
a1e8986d JJ |
7 | \r |
8 | **/\r | |
9 | \r | |
10 | #ifndef _CPU_GDT_H_\r | |
11 | #define _CPU_GDT_H_\r | |
12 | \r | |
13 | //\r | |
14 | // Local structure definitions\r | |
15 | //\r | |
16 | \r | |
17 | #pragma pack (1)\r | |
18 | \r | |
19 | //\r | |
20 | // Global Descriptor Entry structures\r | |
21 | //\r | |
22 | \r | |
23 | typedef struct _GDT_ENTRY {\r | |
053e878b MK |
24 | UINT16 Limit15_0;\r |
25 | UINT16 Base15_0;\r | |
26 | UINT8 Base23_16;\r | |
27 | UINT8 Type;\r | |
28 | UINT8 Limit19_16_and_flags;\r | |
29 | UINT8 Base31_24;\r | |
a1e8986d JJ |
30 | } GDT_ENTRY;\r |
31 | \r | |
32 | typedef\r | |
053e878b MK |
33 | struct _GDT_ENTRIES {\r |
34 | GDT_ENTRY Null;\r | |
35 | GDT_ENTRY Linear;\r | |
36 | GDT_ENTRY LinearCode;\r | |
37 | GDT_ENTRY SysData;\r | |
38 | GDT_ENTRY SysCode;\r | |
39 | GDT_ENTRY SysCode16;\r | |
40 | GDT_ENTRY LinearData64;\r | |
41 | GDT_ENTRY LinearCode64;\r | |
42 | GDT_ENTRY Spare5;\r | |
a1e8986d JJ |
43 | } GDT_ENTRIES;\r |
44 | \r | |
45 | #pragma pack ()\r | |
46 | \r | |
053e878b MK |
47 | #define NULL_SEL OFFSET_OF (GDT_ENTRIES, Null)\r |
48 | #define LINEAR_SEL OFFSET_OF (GDT_ENTRIES, Linear)\r | |
49 | #define LINEAR_CODE_SEL OFFSET_OF (GDT_ENTRIES, LinearCode)\r | |
50 | #define SYS_DATA_SEL OFFSET_OF (GDT_ENTRIES, SysData)\r | |
51 | #define SYS_CODE_SEL OFFSET_OF (GDT_ENTRIES, SysCode)\r | |
52 | #define SYS_CODE16_SEL OFFSET_OF (GDT_ENTRIES, SysCode16)\r | |
53 | #define LINEAR_DATA64_SEL OFFSET_OF (GDT_ENTRIES, LinearData64)\r | |
54 | #define LINEAR_CODE64_SEL OFFSET_OF (GDT_ENTRIES, LinearCode64)\r | |
55 | #define SPARE5_SEL OFFSET_OF (GDT_ENTRIES, Spare5)\r | |
a1e8986d JJ |
56 | \r |
57 | #if defined (MDE_CPU_IA32)\r | |
053e878b MK |
58 | #define CPU_CODE_SEL LINEAR_CODE_SEL\r |
59 | #define CPU_DATA_SEL LINEAR_SEL\r | |
a1e8986d | 60 | #elif defined (MDE_CPU_X64)\r |
053e878b MK |
61 | #define CPU_CODE_SEL LINEAR_CODE64_SEL\r |
62 | #define CPU_DATA_SEL LINEAR_DATA64_SEL\r | |
a1e8986d | 63 | #else\r |
053e878b | 64 | #error CPU type not supported for CPU GDT initialization!\r |
a1e8986d JJ |
65 | #endif\r |
66 | \r | |
67 | #endif // _CPU_GDT_H_\r |