Vol. 3C 35-101

MODEL-SPECIFIC REGISTERS (MSRS)

28

Electrical Design Point Log 
When set, indicates that the EDP Status bit has asserted since the 

log bit was last cleared.
This log bit will remain set until cleared by software writing 0.

29

Turbo Transition Attenuation Log
When set, indicates that the Turbo Transition Attenuation Status 

bit has asserted since the log bit was last cleared.
This log bit will remain set until cleared by software writing 0.

30

Maximum Efficiency Frequency Log 
When set, indicates that the Maximum Efficiency Frequency Status 

bit has asserted since the log bit was last cleared.
This log bit will remain set until cleared by software writing 0.

63:31

Reserved.

680H

1664

MSR_

LASTBRANCH_0_FROM_IP

Core

Last Branch Record 0 From IP (R/W)
One of 32 pairs of last branch record registers on the last branch 

record stack. The From_IP part of the stack contains pointers to 

the source instruction . See also:
• Last Branch Record Stack TOS at 1C9H

• Section 17.6 and record format in Section 17.4.8.1

0:47

From Linear Address (R/W)

62:48

Signed extension of bits 47:0.

63

Mispred

681H

1665

MSR_

LASTBRANCH_1_FROM_IP

Core

Last Branch Record 1 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

682H

1666

MSR_

LASTBRANCH_2_FROM_IP

Core

Last Branch Record 2 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP. 

683H

1667

MSR_

LASTBRANCH_3_FROM_IP

Core

Last Branch Record 3 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

684H

1668

MSR_

LASTBRANCH_4_FROM_IP

Core

Last Branch Record 4 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

685H

1669

MSR_

LASTBRANCH_5_FROM_IP

Core

Last Branch Record 5 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

686H

1670

MSR_

LASTBRANCH_6_FROM_IP

Core

Last Branch Record 6 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

687H

1671

MSR_

LASTBRANCH_7_FROM_IP

Core

Last Branch Record 7 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

688H

1672

MSR_

LASTBRANCH_8_FROM_IP

Core

Last Branch Record 8 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

689H

1673

MSR_

LASTBRANCH_9_FROM_IP

Core

Last Branch Record 9 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

68AH

1674

MSR_

LASTBRANCH_10_FROM_IP

Core

Last Branch Record 10 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

Table 35-12.   MSRs in Next Generation Intel Atom Processors Based on the Goldmont Microarchitecture (Contd.)

Address

Register Name

Scope

Bit Description

 Hex

Dec