sandpile.org -- x86 architecture -- control registers

x86 architecture
control registers

CR0...15

name

6
3

6
2

6
1

6
0

5
9

5
8

5
7

5
6

5
5

5
4

5
3

5
2

5
1

5
0

4
9

4
8

4
7

4
6

4
5

4
4

4
3

4
2

4
1

4
0

3
9

3
8

3
7

3
6

3
5

3
4

3
3

3
2

3
1

3
0

2
9

2
8

2
7

2
6

2
5

2
4

2
3

2
2

2
1

2
0

1
9

1
8

1
7

1
6

1
5

1
4

1
3

1
2

1
1

1
0

MSW

reserved

N
E

E
T

T
S

E
M

M
P

P
E

CR0

reserved

P
G

C
D

N
W

reserved

A
M

W
P

reserved

N
E

E
T

T
S

E
M

M
P

P
E

CR1

reserved

CR2

page fault virtual address

32-bit
CR3

reserved

page directory base

reserved

P
C
D

P
W
T

res.

page directory pointer table base (if CR4.PAE=1)

64-bit
CR3

reserved

PML4 base ^#1

reserved

P
CD

P
WT

res.

PCID
(implies PCD=PWT=0)

CR4

reserved

U
IN
TR

P
K
S

C
E
T

P
K
E

S
M
A
P

S
M
E
P

K
L

OS
X
SA
VE

PC
ID
E

FS
GS
BA
SE

S
E
E

S
M
X
E

V
M
X
E

VA
57

U
M
I
P

OS
XM
EX

OS
FX
SR

P
C
E

P
G
E

M
C
E

P
A
E

P
S
E

D
E

T
S
D

P
V
I

V
M
E

CR5

reserved

CR6

reserved

CR7

reserved

CR8

reserved

TPR

CR9

reserved

CR10

reserved

CR11

reserved

CR12

reserved

CR13

reserved

CR14

reserved

CR15

reserved

note

description

The number of actually implemented bits depends on the number of physical address bits.
The remaining bits are reserved if less than 52 physical address bits are implemented.

XCR0
name	6 3	6 2	6 1	6 0	5 9	5 8	5 7	5 6	5 5	5 4	5 3	5 2	5 1	5 0	4 9	4 8	4 7	4 6	4 5	4 4	4 3	4 2	4 1	4 0	3 9	3 8	3 7	3 6	3 5	3 4	3 3	3 2
name	3 1	3 0	2 9	2 8	2 7	2 6	2 5	2 4	2 3	2 2	2 1	2 0	1 9	1 8	1 7	1 6	1 5	1 4	1 3	1 2	1 1	1 0	9	8	7	6	5	4	3	2	1	0
XCR0	r e s	L W P	reserved
XCR0	reserved													XT D A T	XT C F G	H W P	A L B R	U IN TR	H D C	C E T S	C E T U	EN QC MD	P K R U	T P C S	V 16 ... 31	V 5 1 2	K r e g	BN DC SR	B r e g	Y M M	X M M	X 8 7