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1 | /** @file\r |
2 | C based implemention of IA32 interrupt handling only\r | |
3 | requiring a minimal assembly interrupt entry point.\r | |
4 | \r | |
5 | Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r | |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #ifndef _CPU_GDT_H_\r | |
17 | #define _CPU_GDT_H_\r | |
18 | \r | |
19 | //\r | |
20 | // Local structure definitions\r | |
21 | //\r | |
22 | \r | |
23 | #pragma pack (1)\r | |
24 | \r | |
25 | //\r | |
26 | // Global Descriptor Entry structures\r | |
27 | //\r | |
28 | \r | |
29 | typedef struct _GDT_ENTRY {\r | |
30 | UINT16 Limit15_0;\r | |
31 | UINT16 Base15_0;\r | |
32 | UINT8 Base23_16;\r | |
33 | UINT8 Type;\r | |
34 | UINT8 Limit19_16_and_flags;\r | |
35 | UINT8 Base31_24;\r | |
36 | } GDT_ENTRY;\r | |
37 | \r | |
38 | typedef\r | |
39 | struct _GDT_ENTRIES {\r | |
40 | GDT_ENTRY Null;\r | |
41 | GDT_ENTRY Linear;\r | |
42 | GDT_ENTRY LinearCode;\r | |
43 | GDT_ENTRY SysData;\r | |
44 | GDT_ENTRY SysCode;\r | |
45 | GDT_ENTRY LinearCode64;\r | |
46 | GDT_ENTRY Spare4;\r | |
47 | GDT_ENTRY Spare5;\r | |
48 | } GDT_ENTRIES;\r | |
49 | \r | |
50 | #pragma pack ()\r | |
51 | \r | |
52 | #define NULL_SEL OFFSET_OF (GDT_ENTRIES, Null)\r | |
53 | #define LINEAR_SEL OFFSET_OF (GDT_ENTRIES, Linear)\r | |
54 | #define LINEAR_CODE_SEL OFFSET_OF (GDT_ENTRIES, LinearCode)\r | |
55 | #define SYS_DATA_SEL OFFSET_OF (GDT_ENTRIES, SysData)\r | |
56 | #define SYS_CODE_SEL OFFSET_OF (GDT_ENTRIES, SysCode)\r | |
57 | #define LINEAR_CODE64_SEL OFFSET_OF (GDT_ENTRIES, LinearCode64)\r | |
58 | #define SPARE4_SEL OFFSET_OF (GDT_ENTRIES, Spare4)\r | |
59 | #define SPARE5_SEL OFFSET_OF (GDT_ENTRIES, Spare5)\r | |
60 | \r | |
61 | #if defined (MDE_CPU_IA32)\r | |
62 | #define CPU_CODE_SEL LINEAR_CODE_SEL\r | |
63 | #define CPU_DATA_SEL LINEAR_SEL\r | |
64 | #elif defined (MDE_CPU_X64)\r | |
65 | #define CPU_CODE_SEL LINEAR_CODE64_SEL\r | |
66 | #define CPU_DATA_SEL LINEAR_SEL\r | |
67 | #else\r | |
68 | #error CPU type not supported for CPU GDT initialization!\r | |
69 | #endif\r | |
70 | \r | |
71 | #endif // _CPU_GDT_H_\r | |
72 | \r |