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Vol. 3 9-25
PROCESSOR MANAGEMENT AND INITIALIZATION
71 SS_reg DW ?
72 SS_h DW ?
73 DS_reg DW ?
74 DS_h DW ?
75 FS_reg DW ?
76 FS_h DW ?
77 GS_reg DW ?
78 GS_h DW ?
79 LDT_reg DW ?
80 LDT_h DW ?
81 TRAP_reg DW ?
82 IO_map_baseDW ?
83 TASK_STATE ENDS
84
85 ; basic structure of a descriptor
86 DESC STRUC
87 lim_0_15 DW ?
88 bas_0_15 DW ?
89 bas_16_23DB ?
90 access DB ?
91 gran DB ?
92 bas_24_31DB ?
93 DESC ENDS
94
95 ; structure for use with LGDT and LIDT instructions
96 TABLE_REG STRUC
97 table_limDW ?
98 table_linearDD ?
99 TABLE_REG ENDS
100
101 ; offset of GDT and IDT descriptors in builder generated GDT
102 GDT_DESC_OFF EQU 1*SIZE(DESC)
103 IDT_DESC_OFF EQU 2*SIZE(DESC)
104
105 ; equates for building temporary GDT in RAM
106 LINEAR_SEL EQU 1*SIZE (DESC)
107 LINEAR_PROTO_LO EQU 00000FFFFH ; LINEAR_ALIAS
108 LINEAR_PROTO_HI EQU 000CF9200H
109
110 ; Protection Enable Bit in CR0
111 PE_BIT EQU 1B
112
113 ; ------------------------------------------------------------