2 C based implementation of IA32 interrupt handling only
3 requiring a minimal assembly interrupt entry point.
5 Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
6 SPDX-License-Identifier: BSD-2-Clause-Patent
14 // Local structure definitions
20 // Global Descriptor Entry structures
23 typedef struct _GDT_ENTRY
{
28 UINT8 Limit19_16_and_flags
;
40 GDT_ENTRY LinearData64
;
41 GDT_ENTRY LinearCode64
;
47 #define NULL_SEL OFFSET_OF (GDT_ENTRIES, Null)
48 #define LINEAR_SEL OFFSET_OF (GDT_ENTRIES, Linear)
49 #define LINEAR_CODE_SEL OFFSET_OF (GDT_ENTRIES, LinearCode)
50 #define SYS_DATA_SEL OFFSET_OF (GDT_ENTRIES, SysData)
51 #define SYS_CODE_SEL OFFSET_OF (GDT_ENTRIES, SysCode)
52 #define SYS_CODE16_SEL OFFSET_OF (GDT_ENTRIES, SysCode16)
53 #define LINEAR_DATA64_SEL OFFSET_OF (GDT_ENTRIES, LinearData64)
54 #define LINEAR_CODE64_SEL OFFSET_OF (GDT_ENTRIES, LinearCode64)
55 #define SPARE5_SEL OFFSET_OF (GDT_ENTRIES, Spare5)
57 #if defined (MDE_CPU_IA32)
58 #define CPU_CODE_SEL LINEAR_CODE_SEL
59 #define CPU_DATA_SEL LINEAR_SEL
60 #elif defined (MDE_CPU_X64)
61 #define CPU_CODE_SEL LINEAR_CODE64_SEL
62 #define CPU_DATA_SEL LINEAR_DATA64_SEL
64 #error CPU type not supported for CPU GDT initialization!