23 segment selector/flags msrs, 00001320h, Es segment selector/flags register (es_sel_msr) – AMD Geode LX [email protected] User Manual
Page 131: Xxxxxxxx_xxxxxxxxh, 00001321h, Cs segment selector/flags register (cs_sel_msr), 00001322h, Ss segment selector/flags register (ss_sel_msr), 00001323h, Ds segment selector/flags register (ds_sel_msr)
AMD Geode™ LX Processors Data Book
131
CPU Core Register Descriptions
33234H
5.5.2.23 Segment Selector/Flags MSRs
The Segment Selector/Flags MSRs provide access to the segment selector and segment flags parts of a segment register.
The contents of segment registers should be accessed using MOV or SVDC/RSDC.
ES Segment Selector/Flags Register (ES_SEL_MSR)
CS Segment Selector/Flags Register (CS_SEL_MSR)
SS Segment Selector/Flags Register (SS_SEL_MSR)
DS Segment Selector/Flags Register (DS_SEL_MSR)
FS Segment Selector/Flags Register (FS_SEL_MSR)
GS Segment Selector/Flags Register (GS_SEL_MSR)
LDT Segment Selector/Flags Register (LDT_SEL_MSR)
Temp Segment Selector/Flags Register (TM_SEL_MSR)
TSS Segment Selector/Flags Register (TSS_SEL_MSR)
IDT Segment Selector/Flags Register (IDT_SEL_MSR)
GDT Segment Selector/Flags Register (GDT_SEL_MSR)
MSR Address
00001320h
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
MSR Address
00001321h
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
MSR Address
00001322h
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
MSR Address
00001323h
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
MSR Address
00001324h
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
MSR Address
00001325h
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
MSR Address
00001326h
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
MSR Address
00001327h
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
MSR Address
00001328h
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
MSR Address
00001329h
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
MSR Address
0000132Ah
Type
R/W
Reset Value
xxxxxxxx_xxxxxxxxh
Segment Selector/Flags MSR Register Map
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
RSVD
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
G
B/D
RSVD
AV
L
RSVD
P
DPL
S
X
E/C
W/R
A
SELECTOR
TI
RPL
Segment Selector/Flags MSR Bit Descriptions
Bit
Name Description
63:32
RSVD
Reserved.
31
G
Limit Granularity Bit.
30
B/D
Stack Address Size / Code Default Size.
29
RSVD
Reserved.
28
AVL
Available. Bit available for operating system use.
27:24
RSVD
Reserved.
23
P
Present.
22:21
DPL
Descriptor Privilege Level.
20
S
Non-System Descriptor.